Littérature scientifique sur le sujet « Groin injuries »
Créez une référence correcte selon les styles APA, MLA, Chicago, Harvard et plusieurs autres
Consultez les listes thématiques d’articles de revues, de livres, de thèses, de rapports de conférences et d’autres sources académiques sur le sujet « Groin injuries ».
À côté de chaque source dans la liste de références il y a un bouton « Ajouter à la bibliographie ». Cliquez sur ce bouton, et nous générerons automatiquement la référence bibliographique pour la source choisie selon votre style de citation préféré : APA, MLA, Harvard, Vancouver, Chicago, etc.
Vous pouvez aussi télécharger le texte intégral de la publication scolaire au format pdf et consulter son résumé en ligne lorsque ces informations sont inclues dans les métadonnées.
Articles de revues sur le sujet "Groin injuries"
1
Dowson, D. J. « Hip and groin pain in sub-elite South African footballers ». South African Journal of Sports Medicine 27, no 4 (25 mai 2016) : 114. http://dx.doi.org/10.17159/2413-3108/2015/v27i4a1265.
Texte intégralRésumé :
Background. Groin injuries are common in football. This can be attributed to the nature of the sport involving rapid accelerations, decelerations, abrupt directional changes and kicking. Groin injuries require lengthy rehabilitation times and predispose players to further injuries. Previous groin injury is a risk factor for future groin injuries, suggesting players are inadequately rehabilitated or the original cause has not been addressed. Objectives. To describe the prevalence, nature and treatment patterns of groin injuries in sub-elite players, and to investigate differences in hip strength and range of motion between players with and without a history of groin injury. Method. Thirty sub-elite, senior university male players were interviewed and questioned regarding groin injuries sustained in the preceding three years. They were assessed using the HAGOS questionnaire, and underwent isokinetic hip flexion/extension strength, adductor squeeze and range of motion tests. Results. Seventeen players (57%) reported having a previous groin injury, with an average score of 83 (16) [mean (SD)] on the HAGOS, compared with 92 (5) for non-injured players. Of the previously injured players, 29% did not seek treatment from a medical professional. Injuries included adductor strain (35%), inguinal-related (18%), iliopsoas-related (12%) and hip joint pathology (6%). The average time off was 25 days. There were no significant differences in isokinetic hip flexion/extension strength, adductor strength and range of motion. Conclusion. The prevalence of groin injuries in this population is relatively high (57%) and requires lengthy rehabilitation time. The HAGOS is a suitable tool to identify groin pain in this population within the sports and recreation and quality of life subscales. Isokinetic hip strength and range of motion testing lacked sensitivity in detecting deficits in players with a previous groin injury. Only two-thirds of injured players consulted a medical practitioner, increasing the likelihood that rehabilitation was inadequate. It is therefore recommended that player/coach education regarding injury management improve in order to reduce subsequent injuries. Keywords. HAGOS, groin injury, prevalence, range of motion, isokinetic strength
2
Trentacosta, Natasha, Dai Sugimoto et Lyle J. Micheli. « Hip and Groin Injuries in Dancers : A Systematic Review ». Sports Health : A Multidisciplinary Approach 9, no 5 (7 août 2017) : 422–27. http://dx.doi.org/10.1177/1941738117724159.
Texte intégralRésumé :
Context: Injury data on hip and groin injuries vary, and these injuries are often misrepresented or overlooked for more commonly seen injuries, such as those to the foot and ankle. Objective: To provide a systematic review of the injury rates of hip and groin pathology in dancers and look to establish a better understanding of the occurrence of hip and groin injuries in the dancer population. Data Sources: A literature search was performed using PubMed and CINAHL databases for articles published between 2000 and 2016. Study Selection: Inclusion criteria consisted of (1) documentation of the number of hip and/or groin injuries, (2) study population consisting of dancers whose training included some level of ballet, and (3) studies of levels 1 through 3 evidence. Study Design: Systematic review. Level of Evidence: Level 3. Data Extraction: A single reviewer identified studies that met the inclusion criteria. The number of overall injuries, hip/groin injuries, study participants, injured participants, training hours per week, mean age of study group, injury definition, injury reporting method, and study time frame were extracted. Results: Thirteen unique studies were included in the descriptive analysis. Of the 2001 dancers included in this study, 3527 musculoskeletal injuries were seen in 1553 dancers. Of these, 345 injuries were localized to the hip and groin region (overall rate, 17.2%). An incidence rate of 0.09 hip and groin injuries per 1000 dance-hours was seen in the selected cohort studies. Of 462 professional dancers, 128 hip/groin injuries were recorded, for an injury rate of 27.7%. Of the 1539 student dancers, 217 hip/groin injuries were recorded, for an injury rate of 14.1% ( P < 0.01). Conclusion: Data on hip and groin injuries have many limitations. However, these injuries represent an important health issue for dancers of all skill levels, encompassing 17.2% of musculoskeletal injuries seen in dancers. An increasing rate of hip/groin injuries is seen in professional dancers compared with students.
3
Lynch, Scott A., et Per A. F. H. Renstr??m. « Groin Injuries in Sport ». Sports Medicine 28, no 2 (1999) : 137–44. http://dx.doi.org/10.2165/00007256-199928020-00006.
Texte intégral
4
Peck, David M. « Treating Atypical Groin Injuries ». Physician and Sportsmedicine 26, no 7 (juillet 1998) : 65. http://dx.doi.org/10.1080/00913847.1998.11440428.
Texte intégral
5
DUPRÉ, THOMAS, FILIP GERTZ LYSDAL, JOHANNES FUNKEN, KRISTIAN R. L. MORTENSEN, RALF MÜLLER, JAN MAYER, HARTMUT KRAHL et WOLFGANG POTTHAST. « Groin Injuries in Soccer ». Medicine & ; Science in Sports & ; Exercise 52, no 6 (juin 2020) : 1330–37. http://dx.doi.org/10.1249/mss.0000000000002243.
Texte intégral
6
Karlsson, Jon, Leif Swärd, Peter Kälebo et Roland Thomée. « Chronic Groin Injuries in Athletes ». Sports Medicine 17, no 2 (février 1994) : 141–48. http://dx.doi.org/10.2165/00007256-199417020-00006.
Texte intégral
7
Biomeley, N., et B. De Morton. « Examination techniques for groin injuries ». Journal of Science and Medicine in Sport 12 (janvier 2009) : S77. http://dx.doi.org/10.1016/j.jsams.2008.12.185.
Texte intégral
8
Serner, Andreas, Johannes L. Tol, Nabil Jomaah, Adam Weir, Rodney Whiteley, Kristian Thorborg, Matthew Robinson et Per Hölmich. « Diagnosis of Acute Groin Injuries ». American Journal of Sports Medicine 43, no 8 (14 mai 2015) : 1857–64. http://dx.doi.org/10.1177/0363546515585123.
Texte intégral
9
Tyler, Timothy F., Holly J. Silvers, Michael B. Gerhardt et Stephen J. Nicholas. « Groin Injuries in Sports Medicine ». Sports Health : A Multidisciplinary Approach 2, no 3 (29 avril 2010) : 231–36. http://dx.doi.org/10.1177/1941738110366820.
Texte intégralRésumé :
Context: An in-season groin injury may be debilitating for the athlete. Proper diagnosis and identification of the pathology are paramount in providing appropriate intervention. Furthermore, an adductor strain that is treated improperly can become chronic and career threatening. Any one of the 6 muscles of the adductor muscle group can be involved. The degree of injury can range from a minor strain (grade 1), where minimal playing time is lost, to a severe strain (grade 3), in which there is complete loss of muscle function. Persistent groin pain and muscle imbalance may lead to athletic pubalgia. Evidence Acquisition: Relevant studies were identified through a literature search of MEDLINE and the Cochrane database from 1990 to 2009, as well as a manual review of reference lists of identified sources. Results: Ice hockey and soccer players seem particularly susceptible to adductor muscle strains. In professional ice hockey and soccer players throughout the world, approximately 10% to 11% of all injuries are groin strains. These injuries have been linked to hip muscle weakness, a previous injury to that area, preseason practice sessions, and level of experience. This injury may be prevented if these risk factors are addressed before each season. Conclusion: Despite the identification of risk factors and strengthening intervention for athletes, adductor strains continue to occur throughout sport. If groin pain persists, the possibility of athletic pubalgia needs to be explored, because of weakening or tears in the abdominal wall muscles. A diagnosis is confirmed by exclusion of other pathology.
10
Schilders, E. « (iii) Groin injuries in athletes ». Current Orthopaedics 14, no 6 (novembre 2000) : 418–23. http://dx.doi.org/10.1054/cuor.2000.0148.
Texte intégralThèses sur le sujet "Groin injuries"
1
Gibbon, Wayne William. « The anatomical basis of groin pain in athletes ». Thesis, University of South Wales, 2006. https://pure.southwales.ac.uk/en/studentthesis/the-anatomical-basis-of-groin-pain-in-athletes(d31a3834-df5d-4bf9-86ce-1d3fcbaf34cd).html.
Texte intégralRésumé :
This thesis is the culmination of a program of research which initially began in 1995. It reflects a major professional interest in the imaging of sports injuries which developed gradually over the 10 year period between 1992 to 2001, based upon previous clinical experience and expertise in the management of musculoskeletal injuries and their anatomical and pathomechanical origins. The central theme of study relates to the use of cross-sectional imaging techniques to investigate the pathoanatomical basis for groin pain in althletes with particular reference to professional soccer players with chronic groin pain. The current thesis is based around two key postulates. Firstly, that most of the commonly diagnosed causes of groin pain in professional athletes are anatomically and functionally linked and, secondly, that modern cross-sectional imaging can demonstrate both the correct diagnosis and the underlying biomechanical causes. The program of study consists of three different but linked project themes. The first investigates the scope of the problem, i.e. the differential diagnosis and prevalence of groin pain in professional soccer players. The second investigates the precise "normal" anatomy, i.e. the gross topographical anatomy of the pubic symphysis and parasymphyseal regions as actually exists rather than the regional anatomy that appears in classical anatomical texts. The third builds upon the first two projects and, investigates the underlying pathomechanical processes using magnetic resonance imaging. The study results suggest that a unifying mechanism of injury exists which partly explains the diagnostic and therapeutic difficulties that occur in athletes with groin pain. It also demonstrates that better understanding of the true pubic symphyseal anatomy allows a more accurate diagnosis to be made and that magnetic resonance imaging can demonstrate the relevant underlying pathoanatomy. The thesis adds significantly to the body of scientific knowledge related to this important sports-related, clinical condition.
2
Visser-Maritz, Karien. « Knee kinematics during a single-leg drop-landing in sports participants with chronic groin pain ». Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86507.
Texte intégralRésumé :
Thesis (MScPhysio)--Stellenbosch University, 2014.ENGLISH ABSTRACT: Introduction: Groin injuries are among the top six injuries in contact sports and may lead to career ending chronic pain. Research on the role of knee kinematics in developing chronic groin pain in sport is scarce. Objective: The purpose of this study was to determine if there are differences in knee kinematics during a single-leg drop-landing in sports participants with chronic groin pain compared to asymptomatic controls. Methodology: A descriptive study was conducted. Twenty active sports’ participants were recruited from soccer and rugby clubs situated around the Cape Peninsula area, Western Cape, South Africa. The three-dimensional (3D) knee kinematics of ten cases with chronic groin pain and ten asymptomatic controls was analysed. Knee kinematics was analysed in the FNB-3D Vicon Laboratory at Stellenbosch University, using an eight camera Vicon system. A positive adductor squeeze test was used as a diagnostic test to include cases with chronic groin pain. Each participant performed six single-leg drop landings. The main outcome measure was 3D knee kinematics at initial foot contact and at the lowest vertical position of the drop landing. The following sub-groups were analysed: seven unilateral groin pain cases compared to their seven matched controls; three bilateral groin pain cases where their most painful leg and least painful leg were compared to their matched controls, respectively. Descriptive statistical techniques were used for all outcome measures; means and standard deviations (SD) were calculated, followed by a Student’s t-test to determine significant differences between the cases and controls. For all outcomes with p-values equal to or below 0.05, the effect size was calculated using the Cohen’s D. Results: The findings of this study indicated a significant difference (p=0.0001) between cases with unilateral groin pain having less knee internal rotation compared to the controls at the lowest vertical position of the drop landing in the transverse plane. Significantly less internal rotation (p<0.0001), was also noted in the cases with bilateral groin pain (in the most painful leg and the less painful leg), although this was noted at foot contact. Cases with bilateral groin pain also had significantly (p<0.001) more knee varus (adduction) during the landing phase. Conclusion: Differences in knee kinematics between sports participants with chronic groin pain and asymptomatic controls were found. These findings imply that the knee joint should be included during assessment and rehabilitation of individuals suffering with chronic groin pain. Due to the cross-sectional study design of the current study, it cannot be stated for certain whether the knee kinematics noted in the groin pain group are causative or as a result of groin pain. Future prospective studies are thus recommended; these studies should focus on the effect of contralateral knee kinematics on the hip adductors and may include exploration of the muscular components during a single-leg drop landing.
AFRIKAANSE OPSOMMING: Inleiding: Lies beserings is een van die top ses beserings in kontak sport en kan lei tot chroniese lies pyn en selfs die be-eindigging van ‘n sportloopbaan. Navorsing oor die rol van knie kinematika in die ontwikkeling van chroniese liesbeserings in sport is skaars. Doelwit: Die doel van hierdie studie was om te bepaal of daar verskille in die knie kinematika is tydens 'n enkel been val landing in sport deelnemers met chroniese lies pyn in vergelyking met gesonde kontroles. Metode: 'n Beskrywende studie was uitgevoer. Twintig aktiewe sport deelnemers is gewerf van rugby en sokker sportklubs geleë rondom die Kaapse Skiereiland, Wes-Kaap, Suid-Afrika. Die 3D knie kinematika van tien gevalle met chroniese lies pyn en tien asimptomatiese bypassende kontroles is ontleed. Knie kinematika was ontleed in die FNB-3D Vicon Laboratorium by die Universiteit van Stellenbosch, met behulp van 'n agt-kamera Vicon stelsel. 'n Positiewe Adduktor druk toets was gebruik as 'n diagnostiese toets om gevalle met chroniese lies pyn in te sluit. Om die knie kinematika te analiseer, het elke deelnemer ses enkel been val landings uitgevoer . Die belangrikste uitkomsmeting was 3D knie kinematika by die aanvanklike voet kontak en by die laagste vertikale posisie van die enkel-been val landing. Die volgende sub-groepe was ontleed: sewe unilaterale lies pyn gevalle in vergelyking met hul sewe bypassende kontroles; drie bilaterale lies pyn gevalle waar hul mees pynlike been, sowel as minder pynlike been onderskeidelik vergelyk was met hul bypassende kontroles. Beskrywende statistiese tegnieke was gebruik vir alle uitkoms maatreëls; gemiddeldes en standaardafwykings (SA) was bereken, gevolg deur 'n Studente’s t-toets om beduidende verskille tussen die gevalle en kontroles te bepaal. Vir al die uitkomste met p-waardes gelyk of onder 0.05, is die effekgrootte bereken deur die Cohen’s D. Resultate: Die bevindings van hierdie studie dui op 'n beduidende verskil (p=0,0001) tussen gevalle met unilaterale lies pyn met minder interne knie rotasie in vergelyking met die kontroles by die laagste vertikale posisie van die val landing in die dwars vlak. Aansienlik minder interne rotasie (p<0,0001), is ook opgemerk in gevalle met bilaterale lies pyn (in die mees pynlike been en die minder pynlik been), alhoewel tydens voet kontak. Gevalle met bilaterale lies pyn het ook betekenisvol (p <0.001) meer knie varus (adduksie) tydens die landingsfase gehad. Gevolgtrekking: Verskille bestaan in die knie kinematika tussen sport deelnemers met chroniese liesbesering pyn en gesonde kontroles. Hierdie bevindinge impliseer dat die knie behoort ingesluit te word tydens die assessering en rehabilitasie van individue met chroniese lies pyn. As gevolg van die deursnee-studie ontwerp van hierdie studie, kan dit nie bevestig word of die knie kinematika die oorsaak van die chroniese pyn is nie. Toekomstige voornemende studies word dus aanbeveel, hierdie studies moet fokus op die effek van die kinematika van die kontralaterale knie op die heup adduktore en kan moontlik die ondersoek van die spier kinetika tydens hierdie aktiwiteit insluit.
3
Janse, van Rensburg Lienke. « Pelvic kinematics during single-leg drop-landing in sports participants with chronic groin pain ». Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86697.
Texte intégralRésumé :
Thesis (MScPhysio)--Stellenbosch University, 2014.ENGLISH ABSTRACT: Introduction: Chronic groin injuries are common among athletes and have the potential to lead to chronic and career-ending pain. There is no evidence available whether pelvic kinematics can be perceived as a risk factor in developing chronic groin pain in sport or be the cause of further injuries of the lower quadrant or lumbar spine. Objective: The purpose of this study was to determine if there are any differences in pelvic kinematics of active sports participants with chronic groin pain compared to healthy controls during a single-leg drop-landing. Methodology: A descriptive study was conducted. The three-dimensional (3D) pelvic kinematics of ten cases with chronic groin pain and ten asymptomatic controls was analyzed. Pelvic kinematics was analyzed at the FNB 3D Vicon Laboratory at Stellenbosch University using an eight camera Vicon system. A physical examination, including functional movements, posture analysis, hip, knee and ankle passive range of motion measurements, sacro-iliac tests and anthropometric measurements was done by two physiotherapists prior to the 3D analysis. To analyze the pelvic kinematics, each participant performed six single-leg drop-landings. The main outcome measure was 3D pelvic kinematics at initial foot contact (IFC) and foot contact at lowest vertical position (LVP). The following sub-groups were analyzed: seven with unilateral groin pain and three with bilateral groin pain; the latter was further divided into those with the most painful leg and the least painful leg. Mean and standard deviations (SD) for pelvic kinematics were calculated and significant differences between sub-groups were determined using two-tailed Student’s t-tests. The Cohen’s D effect size calculator was used to calculate the effect size of significant differences in pelvic kinematics between case and control groups. Results: The findings indicated a significant difference (p=0.03) in frontal plane pelvic kinematics at IFC for the unilateral group. The most painful groin group showed significant differences at IFC (p=0.004) and at LVP (p=0.04) in the frontal plane pelvic kinematics. The least painful groin group showed a significant difference at LVP (p=0.01). All cases landed with pelvic downward lateral tilt during the landing phase compared to matched controls. The groin pain group with bilateral pain showed significant differences at IFC (p < 0.001) and LVP (p=0.005) for the most painful groin; and the least painful groin at IFC (p=0.01) and LVP (p=0.01) in the sagittal plane pelvic kinematics. The bilateral groin pain group showed an increase of anterior pelvic tilt in the sagittal plane during the landing phase when compared to matched controls. Increased internal pelvic rotation in the transverse plane was significant for the unilateral group at IFC (p=0.04) and for the most painful groin group at IFC (p < 0.001) and LVP (p < 0.001) compared to matched controls. Conclusion: Results from this study shows that pelvic kinematic changes in the frontal, sagittal and transverse planes do occur in patients with chronic groin pain when compared to controls. This may imply that muscle weakness around the hip and pelvis may contribute to the development of chronic groin pain in active sports participants. Rehabilitation of these muscles should be taken into consideration when treating patients with chronic groin injuries. Further research should be focused on muscular recruitment patterns in sports participants with groin pain to critically define the muscular causal factors in more depth.
AFRIKAANSE OPSOMMING: Inleiding: Kroniese lies beserings is ‘n algemene verskynsel onder die aktiewe sport populasie. Dit mag tot kroniese pyn lei en het die potensiaal om ‘n sport loopbaan te be-eindig. Tans, is daar geen verdere navorsing beskikbaar oor die invloed van bekken kinematika op onderste ledemaat beserings asook die moontlike oorsaak tot kroniese lies pyn in atlete nie. Oogmerk: Die doel van hierdie studie was om vas te stel watter verskille in die bekken kinematika ontstaan tussen aktiewe sport deelnemers met kroniese lies pyn teenoor aktiewe sport deelnemers sonder enige pyn of beserings tydens ‘n enkel been aftrap beweging. Metodologie: Tien deelnemers met kroniese lies pyn en tien asimptomatiese deelnemers is gebruik om die verskille tussen die 3D bekken kinematika te bepaal. Die FNB 3D Vicon Lab by die Stellenbosch Universiteit is gebruik vir die data analise en insameling. Deelnemers het ‘n fisiese ondersoek ondergaan wat die voglende ingesluit het: funksionele bewegings, postuur analise, omvang van beweging van die heup, knie en enkel, toetse ter uitsluiting van die ilio-sakrale gewrig asook antropometriese aftmetings. Elke deelnemer is versoek om ses enkel-been aftrap sessies te doen. Die hoof uitkomsmeting was die bekken hoeke in the frontale vlak by inisiële voet kontak (IVK) asook die voet kontak teen die laagste vertikale posisie (LVP). Resultate: Die resultate wys ’n beduidende verskil (p=0.03) in die frontale vlak vir bekken kinematika by IVK vir die unilaterale groep. Die mees geaffekteerde been wys ’n beduidende verskil by IVK (p=0.004) en by LVK (p=0.04) in die frontale vlak vir bekken kinematika. Die groep met die minste geaffekteerde been toon ’n beduidende verskil by LVP (p=0.01). Alle simptomatiese deelnemers het met die bekken in afwaartse bekken kanteling geland tydens die landings fase. Die groep met bilaterale pyn toon ’n beduidende verskil by IVK (p < 0.001) en by LVP (p=0.005) vir die mees geaffekteerde been en vir die minste geaffekteerde been by IVK (p=0.01) en LVP (0.01) in die sagittale vlak vir bekken kinematika. Die bilaterale groep met kroniese lies pyn land met meer anterior bekken kanteling in die sagittale vlak gedurende die landings fase teenoor die asimptomatiese groep. Interne bekken rotasie was beduidend meer vir die unilaterale groep by IVK (p=0.04) en vir die mees geaffekteerde been by IVK (p < 0.001) en LVP (p < 0.001) teenoor asimptomatiese deelnemers. Gevolgtrekking: Die resultate van hierdie studie bewys dat daar wel ‘n verskil is in die bekken kinematika van deelnemers met kroniese lies pyn teenoor asimptomatiese deelnemers. Hierdie verskille is waarneembaar in die frontale, sagittale en transverse vlakke. Dit impliseer dat spier swakheid van die bekken en heup spiere ‘n bydrae mag he tot die ontwikkeling van kroniese lies beserings in atlete. Rehabilitasie van bogenoemde spiere is belangrik in die behandeling van kroniese lies beserings. Verdere navorsing oor spier aktiverings patrone in aktiewe, sports deelnemers met kroniese lies pyn word benodig, om die oorsprongs faktore te ondersoek.
4
Sawle, Leanne. « The development and evaluation of a dynamic elastomeric fabric orthosis to support the management of athletic pelvic/groin injury ». Thesis, University of Plymouth, 2015. http://hdl.handle.net/10026.1/4307.
Texte intégralRésumé :
Athletic pelvic/groin injuries can be difficult to define, diagnose and therefore manage. These injuries are often the result of multifactorial dysfunction, making them susceptible to becoming chronic. Transverse pelvic belts have shown effectiveness in reducing pain and improving function in athletes with pelvic/groin pain, but there may be better alternatives. Exploring different pelvic belt configurations with athletes with pelvic/groin pain confirmed the role of a transverse belt but also found that diagonal belts produced significantly (< 0.05) greater effects upon clinical measures of pain and function. Dynamic elastomeric fabric orthoses (DEFOs) are Lycra®-based orthoses theorised as providing stability and enhancing proprioception. A DEFO was designed to apply diagonal force to the pelvic girdle and mimic transverse belt application. In a series of single case studies the DEFO was found to have beneficial effects upon pain and/or function in selected athletes with pelvic/groin pain. Athletes’ subjective reports suggested that balance and power may have also been positively influenced. Further work exploring appropriate measures of athletic balance led to the investigation of the intra-rater reliability of a functional measure; the multiple single-leg hop-stabilisation test. Good to excellent reliability (ICC = 0.85; CI 0.61-0.90) confirmed this measure as being reliable for use in a future study, and highlighted relationships with other factors such as age and training status. The findings of a pilot RCT indicated that with minor revisions this protocol could be effectively implemented in informing a future RCT. Findings also indicated that the DEFO led to moderate to large effect sizes on clinical measures (d = 0.6-1.1) of active straight leg raise and squeeze test force, and negligible to small effects on measures of power and functional balance (d = 0.1-0.3). This thesis therefore outlines the development and initial evaluation of a novel DEFO for supporting the management of athletic pelvic/groin injury. Further work is required to undertake a fully powered RCT, and to explore the mechanistic action of this DEFO.
5
Harwin, Lauren Sandra. « Ankle kinematics and ground reaction force during single leg drop landing in sports participants with chronic groin pain ». Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86520.
Texte intégralRésumé :
Thesis (MScPhysio)--Stellenbosch University, 2014.ENGLISH ABSTRACT: Aims: This study aims to ascertain if there are differences in ankle kinematics and ground reaction force in sports participants with chronic groin pain compared to healthy controls. Methods: A cross sectional descriptive study design was used. Twenty participants - 10 cases with chronic groin pain and 10 healthy controls participated. The 10 cases included participants with unilateral pain (n=7) and bilateral pain (n=3). For analysis, the bilateral pain group was divided into the most and less painful side. The study was conducted at the FNB 3D Motion Analysis Laboratory, Stellenbosch University. Sagittal plane kinematics and VGRF was analysed during a single leg drop landing. Results: The group with unilateral groin pain had a higher peak force compared to the matched side of the controls. The bilateral pain groups had less plantarflexion at foot contact (most affected p=<0.001; least affected p=<0.001) and total range of motion (p=<0.05) compared to the control group. The bilaterally injured groin pain groups demonstrated less peak force when compared to controls. Conclusion: This is the first study to indicate alterations in ankle kinematics and VGRF and that these changes are more apparent in sports participants with bilateral pain. Less range of motion during the landing task illustrated by the bilateral pain group suggests less effective force absorption of the distal segments. In the bilateral groups it suggests that force attenuation may have occurred high up the kinetic chain which may place more strain on the groin. Clinically rehabilitation of the athlete with chronic groin pain should include the distal segments of the lower limb. Further research should be conducted in larger groups.
AFRIKAANSE OPSOMMING: Doelstellings: Hierdie studie poog om vas te stel of daar verskille in enkelbeweging en grondvloer-reaksiekrag is in deelnemers van sport met chroniese liespyn in vergelyking met gesonde kontrole deelnemers. Metode: ‘n Deursnee beskrywende studieontwerp is gebruik. Twintig deelnemers, 10 gevalle met chroniese liespyn en 10 gesonde kontrole het deelgeneem. Die 10 gevalle het ingesluit deelnemers met eensydige pyn (n=7) en bilaterale pyn (n=3). Vir die analise, is die bilaterale pyngroep verdeel in die mees en mins geaffekteerde kant. Die studie is gedoen by die FNB3D Beweginsanalise-laboratorium, Universiteit van Stellenbosch. Sagitaal-platvlak kinematiek en vertikale reaksiekrag is geanaliseer gedurende ‘n enkele beenlanding. Resultate: Die groep met eensydige liespyn het ‘n hoër piekkrag gehad in vergelyking met dieselfde kant van die kontrolegroep. Die bilaterale pyngroep het minder plantaarfleksie met voetkontak getoon (mees geaffekteer p=<0.001; minste geaffekteer p=<0.001) en totale beweginsomvang (p=<0.05) in vergelyking met die kontrolegroep. Die bilateraal-liesbeseringsgroep het minder piekkrag getoon in vergelyking met die kontrolegroep. Gevolgtrekking: Hierdie is die eerste studie om veranderings in enkelbeweging en grondreaksiekrag aan te toon, asook dat hierdie veranderinge meer opvallend is in persone wat aan sport deelneem wat bilaterale pyn ondervind. Verminderde beweginsomvang gedurende die landingstaak deur die bilaterale pyngroep suggereer minder effektiewe kragabsorpsie van die distale segmente. In die bilaterale groep suggereer dit dat kragvermindering waarskynlik hoog op die kinematiese ketting voorgekom het wat weer meer stremming op die lies plaas. Kliniese rehabilitasie van die atleet met chroniese pyn behoort die distale segmente van die onderste ledemaat in te sluit. Verdere navorsing behoort in groter groepe uitgevoer te word.
6
Dare, Michael Robert. « Investigation of hip kinematics in adult sports participants during single leg drop landing with chronic groin pain ». Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86334.
Texte intégralRésumé :
Thesis (MScPhysio)--Stellenbosch University, 2014.ENGLISH ABSTRACT: Introduction-Groin injuries are among the top six most cited injuries in soccer and account for 10-18 per cent of all injuries reported in contact sport. Groin pain can result from a variety of pathologies, but according to literature, 63 per cent of groin pain is due to adductor pathology. Objective-The objective of this study was to explore if there are kinematic differences in the hip joint in sports participants with groin pain compared to matched healthy controls. Study design A cross sectional, descriptive study was conducted. Study setting-The study was conducted at the FNB -3D motion analysis laboratory at the University of Stellenbosch, South Africa. Outcome variables-The dependent variables included hip kinematics in the sagittal, frontal and transverse planes at foot strike, lowest vertical point of the pelvis and total range of hip motion during a single leg drop landing. Methodology-The study sample comprised 20 male club level soccer-and, rugby players, running and cycling participants between the ages of 18-55 years of age. Ten of the subjects had chronic groin pain and the other ten were healthy matched controls. An eight-camera Vicon system was used to analyse the kinematics of the hip joint during single leg drop landing. For the purpose of comparison, the data was analysed for participants with unilateral groin pain and matched controls (n=14) and participants with bilateral groin pain and controls (n=6). The full set of data was subdivided for analysis into three distinct sub-groups. Unilaterally injured groin cases (n=7) were matched with seven healthy controls for analysis. Bilaterally injured groin cases (n=3) were matched with three healthy controls. Results-Cases with unilateral groin pain at initial contact had significantly more abduction of the hip joint when compared to controls (p<0.05). The effect size of this difference was large (0.94). Cases with unilateral groin pain also demonstrated greater hip internal rotation while the controls had external rotation (p<0.05) during a drop landing activity. Bilaterally injured groin cases landed with significantly (p=?) greater ranges of hip flexion as well as in significantly (p=?) more hip abduction during a drop landing activity. They also demonstrated greater total range of motion in the frontal plan when compared to controls. Groin pain cases overall demonstrated greater ranges of motion and tended to land in more abduction compared to controls. Conclusion-This study found that during a single leg drop landing, sports participants with unilateral chronic groin pain landed with significantly greater hip abduction and exhibited larger total range of motion in the transverse plane, which may indicate impaired stability of the hip complex when compared to controls.
AFRIKAANSE OPSOMMING: Inleiding-Liesbeserings is een van die top ses mees prominente sokker beserings. Dit beloop 10-18 persent van alle beserings wat in kontaksport aangemeld word. Liespyn kan die gevolg wees van ‘n verskeidenheid patologië, maar volgens die literatuur is 63 persent van liespyn as gevolg adduktor patologie. Doelwitte-Die doelwit van hierdie studie was om ondersoek in te stel of daar enige kinematiese veranderinge in die heupgewrig is in spelers met liespyn in vergelyking met dieselfde vergelykbare spelers sonder liespyn. Studie Ontwerp-‘n Deursnit, beskrywende studie was onderneem. Studie Omgewing-Die studie was uitgevoer by die FNB-3D bewegingsanalise laboratorium van die Stellenbosch Universiteit, Suid-Afrika. Uitkomsveranderlikes-Die afhanklike veranderlikes het in gesluit die heup kinematika in die sagitale, frontale en transvers vlakke met voet kontak endie laagste vertikale punt van die pelvis sowel as die totale heup omvang van beweging gedurende een been landing. Metodologie-Die studie populasie het bestaan uit 20 manlike sokker- en, rugbyspelers, hardlopers en fietsryers tussen die ouderdomme van 18 en 55 jaar. Tien van die deelnemers het kroniese liespyn gehad en die ander tien in die gelyke gesonde groep was sonder liespyn. Die agt kamera Vicon sisteem was gebruik om die kinematika van die heupgewrig te analseer tydens een been landing. Vir die doel om ‘n vergelyking te kan maak, was die data geanaliseer van deelnemers met unilaterale liespyn en die vergelykende groep sonder liespyn (n=14) en deelnemers met bilaterale liespyn en hulle vergelykende groep sonder liespyn (n=6).. Die volledige stel data was onderverdeel in drie afsonderlike sub groepe. Vir die analiese was unilaterale liesbeserings (n=7) vergelyk met sewe deelnemers sonder liespyn in die kontrolegroep. Deelnemers met bilaterale liesbeserings (n=3) was vergelyk met drie in die kontrolegroep. Resultate-Die deelnemers met unilaterale liespyn het met eerste kontak beduidend meer abduksie van die heupgewrig gehad in vergelyking met die kontrolegroep (p<0.05). Die effek van hierdie verskil was groot (0.94). Die deelnemers met unilaterale liespyn het ook ‘n grooter interne rotasie getoon, terwyl die kontrole groep meer eksterne rotasie gedemonstreer het (p<0.05) met landing. Deelnemers met bilaterale liespyn het beduidend (p=?) meer heup fleksie en abduksie omvang van beweging tydens landing. Hulle het ook ‘n groter totale heup omvang van beweging in die frontale vlak gehad in vergelyking met die kontrolegroep. Deelnemers met liespyn het oor die algemeen ‘n grooter omvang van beweging getoon, en was geneig om met meer abduksie van die heup te land as die kontrolegroep. Gevolgtrekking-Die studie toon dat deelnemers met kroniese unilaterale liespyn, tydens een been landing, beduidende meerheup abduksie toon en dat die heup in die transverse vlak meer totale omvang van beweging gebruik wat kan dui op onstabiliteit in die heupkompleks in vergelyking met die kontrolegroep.
7
Morris, Tracy Louise. « Investigation of thoracic spine kinematics in adult sports participants with chronic groin pain during a single leg drop landing task ». Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86314.
Texte intégralRésumé :
Thesis (MScPhysio)--Stellenbosch University, 2014.ENGLISH ABSTRACT: Chronic groin pain is widespread across many sporting disciplines. The aim of our research was to determine if there are kinematic differences of the thoracic spine in active sports people with chronic groin pain, compared with healthy controls. A cross-sectional descriptive design was followed. Participants were required to complete six single leg drop landings with each leg from a 20cm height. The study was done in the 3D Movement Analysis Laboratory at the University of Stellenbosch. Ten male participants with unilateral or bilateral chronic groin pain of more than 3 months duration and 10 asymptomatic males, matched for age and sports participation, were recruited. The main outcome measures were: thoracic spine angle at initial foot contact, maximum thoracic spine angle, range of movement (ROM) (difference between the minimum and maximum values) and thoracic spine angle at lowest vertical point of the pelvis. This was assessed in all 3 movement planes: the sagittal plane (X plane), the coronal plane (Y plane) and the transverse plane (Z plane). The results of our study showed that for the unilaterally affected groin pain group, the cases landed in significantly more thoracic flexion (P<0.001 with large effect size) and were in significantly more thoracic flexion still at the lowest point. Peak thoracic flexion was significantly more in the cases than the controls. (P<0.001 with medium effect size) The same was true for the bilaterally affected group when landing on the most painful side, although this was not statistically significant. There were no significant differences in the frontal or transverse planes. In the bilaterally painful group, axial rotation ROM was significantly reduced when landing on either leg (worst affected side: P=0.040 with medium effect size and least affected side: p=0.006 with large effect size). The same occurred in the unilaterally affected group, although this was not statistically significant. Our study suggests that, in participants with chronic groin pain, there is greater thoracic forward flexion away from neutral during landing and that total axial rotation ROM during landing is diminished.
AFRIKAANSE OPSOMMING: Kroniese liespyn kom dikwels en in verskeie sportsoorte voor. Die doel van ons studie was om te bepaal of daar kinematiese verskille van die torakale werwelkolom is in aktiewe sportmense met chroniese liespyn, in vergelyking met gesonde kontroles. ‘n Dwars-deursnit beskrywende studiemetode is gevolg, en uitgevoer in die 3D Beweging Analise Laboratorium, Universiteit van Stellenbosch. Deelnemers moes ses landings op een been doen, met elke been, vanaf 'n 20cm hoogte. Tien mans met eensydige of bilaterale chroniese liespyn vir langer as 3 maande, en 10 asimptomatiese mans (ooreenstemmende ouderdom en sport deelname) het deelgeneem. Die hoof uitkomste wat gemeet is, was torakale werwelkolom krommingshoek by aanvanklike voet-kontak, maksimum torakale werwelkolom krommingshoek, omvang van beweging (OVB) (verskil tussen die minimum en maksimum waardes) en torakale werwelkolom krommingshoek by die laagste punt van die bekken. Dit is beoordeel in al 3 beweging vlakke: die sagittale (X) vlak, die koronale/frontale (Y) vlak en die transversale (Z) vlak. Die resultate van die studie het getoon dat, in die eensydig-geaffekteerde liespyn groep, die deelnemers in beduidend meer torakale fleksie geland het(P < 0.001, met 'n groot effekgrootte), asook met aansienlik meer torakale fleksie by die laagste punt na landing. Piek torakale fleksie was aansienlik meer in die liespyn-gevalle as in die kontroles. (P < 0.001, met middelmatige effekgrootte ) Dieselfde het vir die bilateraalgeaffekteerde groep gegeld wanneer hulle op hul mees pynlike kant geland het, hoewel dit nie statisties beduidend was nie. Daar was geen betekenisvolle verskille in die frontale of transversale vlakke van beweging nie. In die bilateraal pynlike groep, was aksiale rotasie OVB aansienlik verminder wanneer die gevalle op hul pynlikste been óf op hul minder pynlike been geland het ( mees pynlike been : P = 0,040, met 'n middelmatige effekgrootte en minder pynlike been : p = 0,006, met 'n groot effekgrootte ). Dieselfde het in die eensydig-geaffekteerde groep gebeur, hoewel dit nie statisties beduidend was nie. Ons studie dui daarop dat, in deelnemers met chroniese liespyn, daar meer torokale fleksie weg van neutraal tydens landing is en dat die totale aksiale rotasie OVB tydens die landing verminder is, in vergelyking met die kontrolegroep.
8
Sing, Sharlene E. « Suppression of bruchids infesting stored grain legumes with the predatory bug Xylocoris flavipes (Reuter) (hemiptera : anthocoridae) ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq29789.pdf.
Texte intégral
9
Asanga, Cletus Tangwe. « Changes in environment, grain quality, and insect populations in pearl millet, Pennisetum americanum (L.) Leeke, stored in airtight containers or underground pits ». 1985. http://hdl.handle.net/2097/27390.
Texte intégral
10
Yuan-Long, Wang, et 王源龍. « Cryopreservation of In Vitro-Grown Shoot Tips of Papaya (Carica papaya L.), and Effects of Different Pretreatments on Injuries of Shoot Tips ». Thesis, 2004. http://ndltd.ncl.edu.tw/handle/72406544635600388184.
Texte intégralRésumé :
博士國立中興大學
生命科學系
92
Abstract Shoot tips from in vitro-grown plantlets of papaya （Carica papaya L.） were successfully cryopreserved using the methods of desiccation and vitrification. Shoot tips were dissected from 4 to 6-week-old plantlets. In desiccation, plantlets were preculture on MS medium containing 0.5M sucrose, then shoot tips were firstly dehydrated with dry silica gel, and placed into 2 ml cryo-tubes and plunged into liquid nitrogen immediately. In vitrification, shoot tips were loaded in a 2 ml cryo-tube with a solution of 2 M glycerol and 0.4 M sucrose at 25℃ for 20 min, then dehydrated with 1 ml pre-cooled vitrification solution at 4℃ for 60 min, prior to immersing into liquid nitrogen for at least one week. The maximal recovery rate of shoot tips by desiccation is around 38%. However, by means of vitrification, the recovery rate can be increased to over 68%. Successfully cryopreservated shoot tips can, after being warmed, resume growth within 7 days and develop shoots directly without intermediate callus formation. The result showed that shoot tips between 0.8-1.2 mm are the ideal size for vitrification. Also, prolonged storage duration in liquid nitrogen (up to 2 years) did not affect the regeneration rate. The recovery percentages of six cultivars’ shoot tips after vitrification were between 48% to 93%, depending on the cultivars. This study had successfully developed a simple and effective protocol for cryopreservation of papaya shoot tips. The results of TTC test and structure of papaya shoot tips observation showed that, apical meristem has an important effects to the recovery percentages of papaya after dehydration and cryopreserved. The results of this study demonstrated that the damage effect of vitrification solution can be minimized by lowering working temperature from room temperature to 4℃. In addition, applying a loading solution pretreatment has also been proven useful in reducing harm effects during dehydration process.
Livres sur le sujet "Groin injuries"
1
Karow, Russell S. Evaluating grain for livestock feed. Corvallis, Or : Extension Service, Oregon State University, 1985.
Trouver le texte intégral
2
Zakladnoi, G. A. Stored-grain pests and their control. Sous la direction de Ratanova V. F. New Delhi : Oxonian, 1987.
Trouver le texte intégral
3
Weinzierl, Richard A. 1990 insect pest management guide : Stored grain. Urbana, Ill : University of Illinois at Urbana-Champaign, College of Agriculture, Cooperative Extension Service, 1989.
Trouver le texte intégral
4
Giga, D. P. Rural grain storage in Zimbabwe : Problems, loss assessment, and prevention. Harare : Environment and Development Activities (ENDA) Zimbabwe, 1986.
Trouver le texte intégral
5
Thomasson, Gary L. Stored grain pest control : A study manual for certification in stored grain pest control. [Pullman, Wash.?] : Cooperative Extension, Washington State University, 1991.
Trouver le texte intégral
6
Adler, Cornel. Zur Wirkung modifizierter Atmosphären auf Vorratsschädlinge in Getreide am Beispiel des Kornkäfers Sitophilus granarius (L.) (Col., Curculionidae). Aachen : Verlag Shaker, 1993.
Trouver le texte intégral
7
Throne, James Edward. A bibliography of the Rusty Grain Beetle, Cryptolestes ferrugineus (Stephens) (Coleoptera : Cucujidae). [Washington, D.C.?] : U.S. Dept. of Agriculture, Agricultural Research Service, 1987.
Trouver le texte intégral
8
Zakladnoĭ, G. A. Stored-grain pests and their control. New Delhi : Published for the United States Dept. of Agriculture and the National Science Foundation, Washington, D.C., by Amerind Pub. Co., 1986.
Trouver le texte intégral
9
Zakladnoĭ, G. A. Stored-grain pests and their control. Sous la direction de Ratanova V. F. New Delhi : Oxonian, 1987.
Trouver le texte intégral
10
Zakladnoĭ, G. A. Stored-grain pests and their control. Sous la direction de Ratanova V. F. Rotterdam : A.A. Balkema, 1987.
Trouver le texte intégralChapitres de livres sur le sujet "Groin injuries"
1
Hölmich, Per, Lasse Ishøi, Andreas Serner et Kristian Thorborg. « Groin Injuries ». Dans The Sports Medicine Physician, 223–31. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-10433-7_17.
Texte intégral
2
Adamczyk, Grzegorz. « Groin Anatomy and Biomechanics ». Dans Sports Injuries, 761–71. Berlin, Heidelberg : Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-36569-0_57.
Texte intégral
3
Adamczyk, Grzegorz. « Groin Anatomy and Biomechanics ». Dans Sports Injuries, 1–12. Berlin, Heidelberg : Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-36801-1_57-1.
Texte intégral
4
Loureiro, Nuno, João Pedro Araújo, Luís Simões et Marco Fonseca. « Groin Pain ». Dans Injuries and Health Problems in Football, 217–25. Berlin, Heidelberg : Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-53924-8_19.
Texte intégral
5
Zdanowicz, Urszula, et Robert Smigielski. « Groin Pain : Neuropathies and Compression Syndromes ». Dans Sports Injuries, 271–74. Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-15630-4_36.
Texte intégral
6
Prasad, Radhika, Omar Abdulla et Philip Robinson. « Athletic Groin Pain ». Dans Imaging of Orthopedic Sports Injuries, 327–52. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/174_2020_254.
Texte intégral
7
Bisciotti, G. N., et P. Volpi. « The Groin Pain Syndrome ». Dans Muscle and Tendon Injuries, 273–82. Berlin, Heidelberg : Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54184-5_25.
Texte intégral
8
Bisciotti, Gian Nicola. « The Groin Pain Syndrome ». Dans Arthroscopy and Sport Injuries, 55–68. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-14815-1_8.
Texte intégral
9
Cugat, Ramón, Roberto Seijas, Oscar Ares, Xavier Cuscó, Pedro Álvarez et Montserrat García-Balletbó. « Common Reasons of Groin Pain in Sports ». Dans Sports Injuries, 723–39. Berlin, Heidelberg : Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-36569-0_58.
Texte intégral
10
Robinson, Richard J., et Philip Robinson. « Pelvis and Groin ». Dans Sports Injuries in Children and Adolescents, 145–62. Berlin, Heidelberg : Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/174_2010_15.
Texte intégralActes de conférences sur le sujet "Groin injuries"
1
Akpinar, Seyda, Parisa Saboori et Graham Walker. « Accelerations and Jerks Associated With Shaken Baby Syndrome ». Dans ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52450.
Texte intégralRésumé :
Shaken Baby Syndrome is a collection of injuries that have been associated with the violent shaking of an infant or small child. These injuries can then lead to serious brain damage or even death. It is therefore important to identify the exact mechanism that leads from the shaking to the observed injuries, but little experimental work has been done in this area. The first part of this study was designed to identify if a correlation exists between the physical characteristics of a person shaking a crash test dummy (CRABI) and the resulting accelerations and jerks associated with the motion of the dummy’s head. This was done by placing a three axis accelerometer in the head and two in the body (one in the chest and one in the groin) of a median twelve month old male dummy to determine the acceleration of the head and body. In particular, the relative angular acceleration and jerk of the head relative to the body was determined, since it was felt to be a better predictor of brain damage than would be the absolute linear acceleration of the head. Similar work has been done in the past; however that study only considered the absolute acceleration of the head, and in only one direction. Since the present study allows the attitude of the head to be determined, a true relative angular acceleration of the head relative to the body was found. Consequently, it was found that no strong correlation existed between the absolute linear acceleration and any body characteristic, however a correlation (R2) of 0.6 was found to exist between the body weight of the shaker and the maximum angular jerk of the dummy’s head relative to its body, as compared to only a correlation of 0.5 when the shaker’s body weight was compared to the absolute linear acceleration of the head. A two dimensional dynamic simulation was also developed that modelled the behavior of a child crash test dummy. The model included the legs, torso, and head of the dummy, and the elastic behavior of the neck. The model was created to allow the associated accelerations and jerks to be determined for inputs of various magnitude and temporal profiles. The model was then validated by comparing the simulation results to the test results obtained from the experimental study described above.
2
Neal, Devin, Mahmut Selman Sakar et H. Harry Asada. « Bioengineered Fascicle-Like Skeletal Muscle Tissue Constructs ». Dans ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80228.
Texte intégralRésumé :
Tissue engineered skeletal muscle constructs have and will continue to be valuable in treating, and testing various muscle injuries and diseases. However a significant drawback to numerous methods of producing 3D skeletal muscle constructs grown in vitro is that muscle cell density as a fraction of total volume or mass, is often significantly lower than muscle found in vivo. Therefore a method to increase muscle cell density within a construct is needed.
3
Berrones Sanz, Luis David, et Victoria Alejandra Muro Báez. « Accidentes viales de los motociclistas en México : subgrupos y factores de riesgo ». Dans CIT2016. Congreso de Ingeniería del Transporte. Valencia : Universitat Politècnica València, 2016. http://dx.doi.org/10.4995/cit2016.2016.2172.
Texte intégralRésumé :
Motorcycling as a means of transportation has grown rapidly in Mexico. In the last decade, the number of motorcycles increased 338.05%, which means that motorbikes represent 5.97% of the total number of vehicles in the country. During this period, however, the annual average shows that 3.16% of motorcyclists had an accident, which is proof that motorcycle riders are vulnerable users with high risks in terms of road safety. The objective of this research is to identify the subgroups of motorcyclers with higher accident risks and to identify risk factors. The sample for the quantitative study included all motorbike riders who died or were injured as a result of a reported road accident, between 2000 and 2014. The sample was obtained using the database at the National Institute for Statistics and Geography and the General Direction of Health Information. Descriptive variables were determined for all the categories and were matched to the death cause to find statistical correlation. These systems of information registrered, during 2014 in Mexico, more than 41,881 accidents and 826 deaths caused by motorcycle accident. The highest number of accidents involved men (P<0.001) between 20 and 30 years old, where 20.55% had head injuries and only 16.59% of bikers were wearing a helmet at the time of the accident. This combination – age 20-30, male gender and not wearing a helmet – seems to be a powerful risk factor. However, accidents are largely underreported due to the fact that the format used to receive attention after suffering a violent attack or injury (SIS-SS-127-P) does not include the motorcycle as an agent of injury. For this reason, it is of the utmost importance to create a reliable statistical system and promote a good road safety culture together with protective factors and safety equipment.DOI: http://dx.doi.org/10.4995/CIT2016.2016.2172
4
Gernand, Jeremy M. « Occupational Safety Implications of the Changing Energy Mix ». Dans ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86678.
Texte intégralRésumé :
Renewable energy and natural gas are displacing coal and nuclear power in many parts of the world as sources of electricity. While, the environmental benefits of such changes seem clear, the impact on worker safety, especially in developed nations is less clear. Coal mining is a relatively dangerous occupation, though one that has grown significantly safer in recent decades. Manufacturing and installation of solar photovoltaic (PV) power may pose less risk to workers on a per hour basis, but the number of worker hours necessary to generate a Megawatt-hour of electricity is currently higher for solar PV than it is for coal-generated power. The implications for the overall occupational burden of accidental deaths and injuries has not been previously detailed. This paper presents the results of a Monte Carlo sensitivity analysis for changes in total worker injuries and injury rates under different assumptions for the future energy mix in developed nations. Projections from the Energy Information Agency (EIA) and other organizations together with documented productivity gains for the various energy industries provide test cases for this analysis. The analysis indicates that future occupational fatality and injury burden of the energy sector is highly dependent on improvements in safety in the expanding industries, while specific projections on the share of specific technologies is less critical. This result highlights the need to invest in occupational risk mitigation in these industries.
5
Krebsbach, Meaghen A., et Karim H. Muci-Ku¨chler. « Effect of Initial Surface Concentration on Bacterial Distribution in a Surrogate Ballistic Wound ». Dans ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-64243.
Texte intégralRésumé :
In ballistic injuries, contamination can be carried from the environment, clothing, and skin surface into the wound track. Bacteria and contaminated debris can be introduced into the wound by several means, including physical transport by the projectile or by the suction caused by the formation and collapse of the temporary wound cavity. In this paper, the relationship between initial bacterial concentration on the surface and resultant bacterial distribution along the wound channel is examined using a leg surrogate. Escherichia coli strain K-12 was used to represent skin surface contamination. In order to reduce the possibility of contamination by outside bacteria and assist in colony visualization, the E. coli first underwent a transformation protocol to express Green Fluorescent Protein and to be resistant to the antibiotic ampicillin. Different concentrations of bacteria were pipetted onto circular filter paper and placed onto the surface of a ballistic gelatin leg surrogate, and an 11.43-mm (0.45-in) caliber projectile was shot through the contaminated area into the gel. The “wound track” was sliced into small, evenly spaced samples and the permanent cavity was removed using a biopsy punch, liquefied, and grown on selective lysogeny broth media containing ampicillin. Examination of a normalized bacterial colony count and normalized area covered per segment allowed comparison of variations in the initial concentration, and confirmed that within a range the normalized contamination distribution trend along the “wound track” remained similar. This verification allowed additional confidence in results obtained using this bacteria distribution methodology by eliminating concerns over small variations in initial bacterial concentration.
6
Bernick, Kristin B., et Simona Socrate. « Substrate Dependence of Mechanical Response of Neurons and Astrocytes ». Dans ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53538.
Texte intégralRésumé :
The response of neural cells to mechanical cues is a critical component of the innate neuroprotective cascade aimed at minimizing the consequences of traumatic brain injury (TBI). Reactive gliosis and the formation of glial scars around the lesion site are among the processes triggered by TBI where mechanical stimuli play a central role. It is well established that the mechanical properties of the microenvironment influence phenotype and morphology in most cell types. It has been shown that astrocytes change morphology [1] and cytoskeletal content [2] when grown on substrates of varying stiffness, and that mechanically injured astrocyte cultures show alterations in cell stiffness [3]. Accurate estimates of the mechanical properties of central nervous system (CNS) cells in their in-vivo conditions are needed to develop multiscale models of TBI. Lu et al found astrocytes to be softer than neurons under small deformations [4]. In recent studies, we investigated the response of neurons to large strains and at different loading rates in order to develop single cell models capable of simulating cell deformations in regimes relevant for TBI conditions [5]. However, these studies have been conducted on cells cultured on hard substrates, and the measured cell properties might differ from their in-vivo counterparts due to the aforementioned effects. Here, in order to investigate the effects of substrate stiffness on the cell mechanical properties, we used atomic force microscopy (AFM) and confocal imaging techniques to characterize the response of primary neurons and astrocytes cultured on polyacrylamide (PAA) gels of varying composition. The use of artificial gels minimizes confounding effects associated with biopolymer gels (both protein-based and polysaccharide-based) where specific receptor bindings may trigger additional biochemical responses [1].
7
Grabowski, F. E. « RHEOLOGY AND PRIMARY HEMOSTASIS ». Dans XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643986.
Texte intégralRésumé :
Overview The adhesion-aggregation of platelets to a site of vessel wall injury is a quintessential blood flow phenomenon. Firstly, platelets are driven to the vicinity of the vessel wall by a form of convective diffusion in which red cells both mechanically augment the effective platelet diffusivity (Turitto et al., Ind. Eng. Chem. Fund. 11:216-223, 1972; Grabowski et al., Ind. Eng. Chem. Fund. 11:224-232, 1972) and enhance the near-wall piatelet concentration (Ti11es and Eckstein, Microvasc Res., In press, 1987). Secondly, red cells subjected to physiologic shear forces are capable of secreting sufficient adenine nucleotides to induce primary platelet aggregation without themselves undergoing frank lysis (Reimers et al, Blood 64:1200-1206, 1984). This "humoral" effect of erythrocytes is likely to contribute to primary hemostasis in a shear stress-dependent manner. Thirdly, endothelial cells are able to modulate platelet aggregation at a site of vessel injury by producing prostacyclin (and perhaps other antithrombotic substances) in a manner which increases with vessel shear rate (Grabowski et al, Blood 62:301a, 1983); production for a large range of arterial shear rates appears to be limited by plasma-borne substrate (arachidonate). This manner of production ensures a concentration of prostacyclin in the near-wall region which remains relatively independent of shear rate.Imaging primary hemostasis. In our work, epi-fluorescence videomicroscopy has allowed real time imaging of platelet adhesion-aggregation to a simulated vessel wall injury. The injury model is an endothelial cell monolayer (ECM) across which, prior to ECM exposure to flowing blood, a 6-0 sterile suture is drawn in a direction transverse to flow. Microinjuries result which measure 70 ± 15μm (Mean ± SD) in width. The fluorescent label is the TAB murine monoclonal antibody (courtesy of Dr. R.P. McEver) directed against human platelet GPIIB, together with a fluorescein-conjugated goat F(ab')2 against murine inmunoglobulin. The injured ECM's, grown to confluence on rectangular cover glasses precoated with microfibrillar collagen, comprise one wall of a flow chamber mounted on a vertical microscope stage. On microinjury sites and at shear rates of 100 to 700 sec-1, computer-enhanced video images show adherence, remodelling and growth of chains of platelet aggregates. Aligned with the flow direction, these chains have a spacing of approximately 30)im, a length similar to the average endothelial cell diameter. One may speculate that such chains provide a scaffold for wound healing insofar as they are likely rich in agents chemotactic for leukocytes and in platelet-derived growth factor.Modulatory role of endothelium. When the ECM's are pre treated with 1.0 mM FC lysine acetyl sal icy late (LA), aggregate length increases (P<0.001) up totwo-fold, outflow levels by RIA of serum thromboxane B2 increase (8 of 8 paired runs), and outflow levels of prostacyclin by RIA for 6-Keto PGFiot decrease (5 of 7 paired runs). The Table gives data for one of four similar experiments at 270 sec-1 and following five minutes of flow. These data imply that products of ECM which are inhibitable by aspirin modulate local adhesion-aggregation; their inhibition, as by vasculitis or drugs, may give rise to thrombotic states.Bleeding disorders. Aggregate length is reduced in von Willebrand's disease (4 patients), Hermansky-Pudlak syndrome (2 patients), and after 300 mg oral aspirin (Tablet 4 donors). The reduction in the first two, however, is greater (P<0.01) than that for oral aspirin. With oral aspirin, further, there is a paradoxic increase in the percent platelet coverage of the injury area. Summary. Rheology has profound effects on the rate, structure, and modulation of primary hemostasis. Many of these effects can be studied via real-time, epi-fluorescence videomicroscopy of platelet adhesion-aggregation to a site of injury to an endothelial cell monolayer exposed to flowing blood. The model described has application to the study of thrombotic and hemostatic disorders and unstable angina.