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Relevant bibliographies by topics / Elbow instability

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Academic literature on the topic 'Elbow instability'

Author: Grafiati

Published: 7 June 2025

Last updated: 17 July 2025

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Journal articles on the topic "Elbow instability"

1

O'Driscoll, Shawn W. "ELBOW INSTABILITY." Hand Clinics 10, no. 3 (1994): 405–15. http://dx.doi.org/10.1016/s0749-0712(21)01179-3.

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Graf, Dimitri N., Benjamin Fritz, Samy Bouaicha, and Reto Sutter. "Elbow Instability." Seminars in Musculoskeletal Radiology 25, no. 04 (2021): 574–79. http://dx.doi.org/10.1055/s-0041-1735467.

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AbstractThe stability of the elbow is based on a combination of primary (static) and secondary stabilizers (dynamic). In varus stress, the bony structures and the lateral ulnar collateral ligament (LUCL) are the primary stabilizers, and in valgus stress, the ulnar collateral ligament (UCL) is the primary stabilizer. The flexor and extensor tendons crossing the elbow joint act as secondary stabilizers. Elbow instability is commonly divided into acute traumatic and chronic instability. Instability of the elbow is a continuum, with complete dislocation as its most severe form.Posterolateral rotatory instability is the most common elbow instability and can be detected at imaging both in the acute as well as the chronic phase. Imaging of suspected elbow instability starts with radiographs. Depending on the type of injury suspected, it is followed by magnetic resonance imaging (MRI) or computed tomography evaluation for depiction of a range of soft tissue and osseous injures. The most common soft tissue injuries are tears of the LUCL and the radial collateral ligament; the most common osseous injuries are an osseous LUCL avulsion, a fracture of the coronoid process, and a radial head fracture.Valgus instability is the second most common instability and mostly detected in the chronic phase, with valgus extension overload the dominant pattern of injury. The anterior part of the UCL is insufficient in valgus extension overload due to repetitive medial tension seen in many overhead throwing sports, with UCL damage readily seen at MRI.

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Adams, Julie E. "Elbow Instability." Hand Clinics 36, no. 4 (2020): 485–94. http://dx.doi.org/10.1016/j.hcl.2020.07.013.

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Vollans, Sam R., and Roger P. van Riet. "Elbow instability." Orthopaedics and Trauma 30, no. 4 (2016): 310–16. http://dx.doi.org/10.1016/j.mporth.2016.05.011.

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Lee, Guy A., Stephen D. Katz, and Mark D. Lazarus. "Elbow Valgus Stress Radiography in an Uninjured Population." American Journal of Sports Medicine 26, no. 3 (1998): 425–27. http://dx.doi.org/10.1177/03635465980260031401.

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Valgus instability of the elbow joint is a clinical diagnosis. However, many authors describe valgus stress radiographs as an aid in making this diagnosis. We studied valgus stress radiographs of 20 men (40 elbows) and 20 women (40 elbows), none with a history of elbow trauma or instability. The medial ulnohumeral distance was measured with no stress, valgus stress by gravity, and an applied valgus stress of 25 N (approximately 5 pounds). Measurements were made with the elbow positioned in extension and in 30° of flexion. The increase in medial ulnohumeral gapping with either gravity or 5 pounds of stress was statistically significant at both extension and 30° of flexion compared with the unstressed condition. The difference in ulnohumeral gapping between gravity stress and 5 pounds of valgus stress in extension and in 30° of flexion was also significant. We found no differences with regard to hand dominance or sex. We conclude that uninjured elbows have significant medial ulnohumeral gapping on valgus stress radiography. Although this is an important tool in diagnosing valgus instability of the elbow, it may yield a false-positive assessment of valgus instability. Valgus stress radiographs comparing contralateral elbows may reduce the false-positive rate since there appears to be no significant difference in medial ulnohumeral gapping between the two elbows.

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Shalaby, M. A., and M. Y. A. Younan. "Limit Loads for Pipe Elbows Subjected to In-Plane Opening Moments and Internal Pressure." Journal of Pressure Vessel Technology 121, no. 1 (1999): 17–23. http://dx.doi.org/10.1115/1.2883661.

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The purpose of this study is to determine limit loads for pipe elbows subjected to inplane bending moments that tend to open the elbow (i.e., increase its radius of curvature), and the influence of internal pressure on the value of the limit load. Load-deflection curves were obtained, and from these curves plastic collapse and instability loads at various values of internal pressure were determined. This was done for different pipe bend factors (h = Rt/r2) using the nonlinear finite element analysis code (ABAQUS) with its special elbow element. A set of limit curves was generated from the results. These curves show the variation of collapse and instability loads with internal pressure for different elbows. Collapse loads were found to increase and then decrease with increasing pressure for all the elbow geometries studied. Instability loads were difficult to reach because of the large stiffening effect of the elbow cross-sectional deformation, and they were generally found to decrease with increasing pressure.

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TEZUKA, KAZUSHI, YUKINORI TOMODA, TOKUHIDE DOI, et al. "BASEBALL ELBOW AND ELBOW JOINT INSTABILITY." Japanese Journal of Physical Fitness and Sports Medicine 37, no. 1 (1988): 37–45. http://dx.doi.org/10.7600/jspfsm1949.37.37.

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Tashjian, Robert Z., and Julia A. Katarincic. "Complex Elbow Instability." Journal of the American Academy of Orthopaedic Surgeons 14, no. 5 (2006): 278–86. http://dx.doi.org/10.5435/00124635-200605000-00003.

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Graf, Dimitri N., Benjamin Fritz, Samy Bouaicha, and Reto Sutter. "Erratum: Elbow Instability." Seminars in Musculoskeletal Radiology 25, no. 04 (2021): e1-e1. http://dx.doi.org/10.1055/s-0041-1740231.

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Hutchinson, M. R. "ELBOW INSTABILITY - GYMNASTICS." Medicine & Science in Sports & Exercise 34, no. 5 (2002): S96. http://dx.doi.org/10.1097/00005768-200205001-00536.

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Dissertations / Theses on the topic "Elbow instability"

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Charalambous, Charalambos P. "Posterolateral rotatory elbow instability : biomechanical effects of surgery upon the radial head." Thesis, University of Manchester, 2009. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.551310.

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Mihaltchev, Pavel. "Control of posture and stability of the double-joint (Shoulder/Elbow) arm." Thèse, 2003. http://hdl.handle.net/1866/14480.

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Sandman, Emilie. "Subluxation de la tête radiale suite au malalignement du cubitus proximal : une étude biomécanique." Thèse, 2014. http://hdl.handle.net/1866/11251.

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Le cubitus proximal détient une courbe sagittale unique pour chaque individu, nommée « Proximal Ulna Dorsal Angulation (PUDA) ». Une reconstruction non-anatomique du cubitus proximal, suite à une fracture complexe peut engendrer une malunion, de l’arthrose et de l’instabilité. L’objectif de cette étude était d’évaluer la magnitude de malalignement au niveau de l’angulation proximale dorsale du cubitus qui causerait un malalignement radio-capitellaire, avec et sans un ligament annulaire intact. Afin d’atteindre cet objectif, une étude biomécanique fut conduite sur six spécimens frais congelés avec un simulateur de mouvement du coude. Des fractures simulées au niveau du PUDA, furent stabilisées avec une fixation interne dans cinq configurations différentes. Des images fluoroscopiques furent prises dans différentes positions du coude et de l’avant-bras, avec le ligament annulaire intact, puis relâché. Le déplacement de la tête radiale fut quantifié avec le ratio radio-capitellaire. Une interaction significative fut découverte entre les positions du coude, les angles de malalignement et l’intégrité du ligament annulaire. La subluxation de la tête radiale fut accentuée lors de la déchirure du ligament annulaire. Une augmentation de la subluxation antérieure de la tête radiale fut observée lorsque le malalignement était fixé en extension et lors de mouvements de flexion progressive du coude. D’autre part, un malalignement en flexion et une extension graduelle du coude occasionnait une subluxation postérieure. En conclusion, les résultats ont démontré l’importance d’une reconstruction anatomique du cubitus proximal, car un malalignement de 5 degrés engendre une subluxation de la tête radiale, surtout lors d’une déchirure du ligament annulaire.<br>It has been shown that the proximal ulna has a sagittal bow, named the Proximal Ulna Dorsal Angulation (PUDA), unique for each individual. Non-anatomic reconstruction of the proximal ulna following a complex injury may lead to malunion, arthrosis and instability, hence the importance of understanding its initial anatomy. The purpose of this study was to evaluate the magnitude of angular malalignement at the proximal ulna dorsal angulation that would lead to radiocapitellar malalignement, with and without an intact annular ligament. In order to achieve our goal, a biomechanical study was conducted on six fresh frozen specimens, with an elbow movement simulator. Simulated fractures at the PUDA were stabilized with internal fixation at five different angles. Then, fluoroscopic images were taken in different elbow and forearm positions, first with the annular ligament intact and then released. Radial head displacement was quantified with the Radio-Capitellar-Ratio (RCR). Overall, a significant interaction was found between elbow positions, angles of malalignement and annular ligament integrity. Radial head subluxation was emphasized when the annular ligament was ruptured. Moreover, anterior subluxation of the radial head increased as malalignement was fixed into extension and with progressive elbow flexion. Furthermore, posterior subluxation increased with malalignement into flexion and with elbow extension. In conclusion, our results demonstrate the importance of obtaining an anatomic reconstruction, specific for each individual’s unique proximal ulna dorsal angulation, following a proximal ulna fracture. Indeed, malalignment of 5 degrees can lead to abnormal tracking of the radial head, especially when associated with annular ligament tear.

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Books on the topic "Elbow instability"

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G, Edwards Scott, ed. Acute and chronic elbow instability. Saunders, 2008.

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Salama, Amir, and David Stanley. Chronic instability of the elbow. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199550647.003.05.03.

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Book chapters on the topic "Elbow instability"

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Pederzini, Luigi Adriano, and Felice Di Palma. "Elbow Instability." In Arthroscopy and Sport Injuries. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-14815-1_29.

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Heffernan, John T., Michael O’Brien, and Felix H. Savoie. "Elbow Instability." In Arthroscopy. Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-49376-2_61.

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Park, Min Jung, and Jeffrey Yao. "Elbow Instability." In Musculoskeletal Examination of the Elbow, Wrist, and Hand. CRC Press, 2024. http://dx.doi.org/10.1201/9781003525103-10.

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Codding, Jason L., and Alexander W. Aleem. "Elbow Instability." In The Foundations of Shoulder and Elbow Surgery. CRC Press, 2024. http://dx.doi.org/10.1201/9781003524243-4.

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Kozin, Scott H. "Elbow Instability." In Pediatric Elbow Fractures. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-68004-0_18.

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Bronenberg Victorica, Pedro, Paula Simaro, and Gerardo Luis Gallucci. "Chronic Elbow Instability." In Orthopaedics and Trauma. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-30518-4_99.

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Slutsky, David J. "Midcarpal Instability." In The Elbow and Wrist. CRC Press, 2024. http://dx.doi.org/10.1201/9781003523963-37.

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Marinelli, Alessandro, Enrico Guerra, Marco Cavallo, Michelle Dos Santos Flöter, and Roberto Rotini. "Elbow Dislocation and Instability Classification." In The Elbow. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-27805-6_10.

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Clark, Tyler, Mike O’Brien, and Felix H. Savoie. "Posterolateral Instability in Sportsmen." In Elbow and Sport. Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-48742-6_21.

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Chan, Kevin, and George S. Athwal. "Varus Posteromedial Rotatory Instability." In The Unstable Elbow. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-46019-2_6.

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Conference papers on the topic "Elbow instability"

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Al Kork, Samer, Karim Youssef, Sherif Said, Edward Abraham, and Farid Amirouche. "Investigating Elbow Dislocation and Instability: A 3D Finite Element Analysis Approach." In 2025 6th International Conference on Bio-engineering for Smart Technologies (BioSMART). IEEE, 2025. https://doi.org/10.1109/biosmart66413.2025.11046064.

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Salman, Muhamad, Anaheeta Hadjimirzaei, and Sammy Reed. "Popping Elbow Joint: Effects and Results." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-24591.

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Abstract The aim of this research project is to study patients with elbow instability and design a brace that will help with the injury. The idea for this research project was presented by one of the research partners who has suffered from elbow instability for 10 years. Elbow instability is a rare condition that is mostly unspoken about. Many live with this condition without knowing it exists or simply ignoring it. But the effects of this injury are painful and permanent, making it harder to perform daily tasks using the arm. This research will provide data for a possible medical device to help reduce forces on the elbow joint and help reduce pain from elbow instability. To better analyze data for this injury, the elbow joint must be placed under a force test. Two participants volunteered to perform the test by lifting a series of weights. Data for the Electromyograms (EMG) was then collected using only the Trigno Wireless Biofeedback System, placed above the humerus near elbow joint where the injury is most common. Another aspect of this research was to better understand the popping of the elbow joint. A 3D model of the elbow joint was then printed and further analyzed. All gathered data and analytics are used to study how a medical brace could possibly help with patients’ elbow instability. The final goal for this research will be to design and create a brace that will alleviate pain caused by elbow instability in the patient. The brace will allow users to endure repeated popping of the elbow joint while muscles are contracted and relaxed.

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Al Kork, Samer Khodor, Farid Amirouche, Edward Abraham, and Mark Gonzalez. "Development of 3D Finite Element Model of Human Elbow to Study Elbow Dislocation and Instability." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206282.

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The mechanics of elbow dislocation and its stages of dislocation are complex and not well understood. Reconstructing a fall where someone lands on their hand is one of the most challenging problem in biomechanics. Current models which attempt to reconstruct falls usually focus on experimental kinematical conditions that cause the fall coupled with inverse dynamics to determine the joint and muscles forces [1,2] to provide on insight into the joint instability. Our hypothesis based on our experimental investigation is that the mechanism of posterior elbow dislocation is initiated at radial head where the ulna and coronoid fracture followed by anterior tearing of the joint capsule, lateral collateral ligament will then rupture followed by posterior medial collateral ligament rupture and then the medial collateral ligament peeling off the ulna. In this study we developed a quasi-static three-dimensional finite element of human elbow joint, and conducted several cadaveric studies to study elbow dislocation. The FE model is used to investigate how the ligaments, cartilages behave under different flexion, extension of the elbow. Dislocation is investigated as function of different loads and moments applied to the radius-ulna with arm being flexed and configured into a supination or pronation.

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Jang, Youn-Young, Nam-Su Huh, Jae-Uk Jeong, Ki-Seok Kim, and Woo-Yeon Cho. "Stress Intensity Factor and Elastic COD for Circumferential Through-Wall Cracks in the Interface Between an Elbow and a Straight Pipe Under Internal Pressure." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45517.

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Leak-Before-Break (LBB) is one of important approaches applied to nuclear piping design. In the LBB assessment, it is important to evaluate crack instability and to predict leak rate based on a fracture mechanics concept, in which an idealized straight pipes with through-wall cracks (TWCs) are generally considered in the typical LBB analysis. On the other hand, in nuclear piping system, elbows are often connected with straight pipes by welding, in which cracks could occur as well known. Hence, accurate assessment needs to be performed for cracks in weldments joining an elbow and attached straight pipe. In the previous study, it has been revealed that crack instability of a TWC in the interface between an elbow and a straight pipe under bending moment could be different with that of a straight pipe with a TWC depending on a change of pipe thickness, radius of curvature and crack length. Especially, elbows attached to a pipe were more severe than straight pipes for relatively shorter crack length. Thus, a need of engineering solutions for cracks in the interface between an elbow and a pipe is raised for accurate LBB analysis on nuclear piping system. In this present study, stress intensity factor (SIF) and crack opening displacement (COD) are estimated via detailed 3-dimensional finite element (FE) elastic analyses for circumferential TWCs in the interface between an elbow and a straight pipe subjected to internal pressure. The geometric variables (pipe thickness, radius of curvature and crack length) affecting SIFs and CODs were systematically considered in order to cover actual ranges of geometric variables. Also, the effect of elbow on elastic fracture parameters was investigated by comparing the present results with the results from the previous straight pipe solution. Moreover, based on the present FE results, the shape factors (F, V) used for calculating SIFs and CODs are proposed for circumferential TWCs in the interface between an elbow and a pipe. The present results can be used to perform the accurate LBB assessment for nuclear piping system including elbows welded to a straight pipe.

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Spratley, Edward M., and Jennifer S. Wayne. "A Computational Study of Complex Varus Instability of the Human Elbow Joint." In ASME 2010 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/sbc2010-19599.

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The intact human elbow joint is one of the most inherently stable joints of the body with stability conferred through a complex interplay between highly congruous osseous constraints, capsuloligamentous constraints, and active muscle contractions. [1, 2] Deficits in any of these structures can create instabilities that impede normal joint function.

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Qian, Bo, Jinping Chen, Peng Wu, Bin Huang, and Dazhuan Wu. "Study on the Influence of Centrifugal Pump Inlet Flow Field Instability and Methods of Adjustment." In ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ajkfluids2019-4687.

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Abstract The quality of centrifugal pump inlet flow field is an important factor that affecting the performance of pump. Studies have proved that the vortex in the inlet area can also bring an extra flow instability to pump, which results in a hydro-induced vibration. This phenomenon is more common and significant in the pumps with an elbow tube, which is often applied to minimize installation size, before pump inlet. Therefore, it is necessary to look into the influence of inlet flow field instability on pump performance especially the vibration performance. The methods of adjusting pump inlet flow field is also worthy of being studied in the meantime. In this study, the influence of inlet vortex on the performance of centrifugal pump with an elbow inlet tube is investigated by means of CFD analysis. The flow is significantly affected when going through the elbow tube inlet and then turbulence is generated as a result, which enters the impeller at the next moment. The turbulence brings an asymmetrical flow condition at the impeller suction area, which can intensify pressure pulsation and hydro-induced vibration. In order to reduce the turbulence, two modifications on the elbow inlet tube are investigated in this study. A specially designed vane is deployed inside the inlet tube in the MOD1, and the MOD2 is added with two splitter vanes on the basis of the MOD1. The turbulent flow in the elbow inlet tube can be reordered as it is controlled by the vanes. The difference on pump performances that the inlet vane has made is specifically simulated and compared. The flow fields of the inlet tube influenced by the vane is also investigated on the vortex distribution and velocity vector distribution. The MOD1 has a generally smaller pressure fluctuation amplitude than the prototype in the impeller inlet area while the pressure fluctuation amplitude of the MOD2 in the impeller inlet area is stronger than the prototype. It is considered as a consequence of multiple effects, which are, the rise of velocity because of flow area replacement by the vanes making the flow field less stable as well as the wake flow induced by the vanes increasing the instability of the flow field. Therefore, although the flat vanes can help adjusting the flow field, their negative influences also act in the opposite way. It is worthwhile to find the balance between the benefits and the costs in flow field stability of installing adjusting vanes. The selection of parameter, number and installation position needs to be further investigated. The numerical results of the MOD1 are also validated through experimental investigations.

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Watanabe, Masahiro, and Kensuke Hara. "Theoretical and Experimental Study on Flow-Induced Vibration of an Overflow Pipe Due to Discharged Fluid Flow." In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77492.

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This paper deals with an experimental study and a theoretical stability analysis on unstable vibration of an overflow pipe due to discharged fluid flow. In the system, the overflow pipe consists of vertical and horizontal pipes and an elbow, which is attached at the bottom of the vertical pipe, and the discharged fluid falls along the inner surface of the vertical pipe and changes the flow direction at the elbow. First, the vibration characteristics and instability region of the unstable vibration are examined by the experiments. The instability region in which the unstable vibration occurs is examined with changing flow rate, vertical pipe length and inlet shape of the overflow pipe. Next, the theoretical stability analysis is conducted. In the theoretical analysis, a theoretical model of the unstable vibration in the vertical direction is developed, and the instability region is shown by the stability analysis.

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Chu, Thomas, Jen M. Ty, Bayram Orazov, et al. "Surgeon Experience Level Affects Mechanics of the Pivot Shift Test for Posterolateral Rotatory Instability of the Elbow." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206560.

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Posterolateral rotatory instability (PLRI) of the elbow occurs secondary to an injury to the lateral ulnar collateral ligament and lateral stabilizing structures [2]. The lateral pivot-shift test (PST) is a clinical examination for diagnosing PLRI [1]. The test involves moving the elbow from full extension to flexion while applying simultaneous supination torque, valgus moment, and axial compression [2]; a positive result is characterized by ulnohumeral subluxation that is seen clinically as posterolateral movement of the radial head and an incongruent radiocapitellar joint [2]. The PST is difficult to reliably reproduce in an office setting [3]. This can be due to patient-guarding or inexperience of the examiner. It is likely that the experienced examiner may perform the test differently from the inexperienced examiner. The PST has not previously been characterized biomechanically in the laboratory. Thus, the objective of this study is to fully characterize the biomechanics of the PST for PLRI. We will evaluate the repeatability of the PST across multiple surgeons and determine how the clinician’s level of training affects their method of testing. These results will be useful in developing training guidelines to standardize PST application as well as to improve accuracy.

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Le Delliou, Patrick, Sébastien Saillet, and Georges Bezdikian. "Large EDF Tests on Aged Cast Duplex Stainless Steel Components: Part II — Full Scale Tests." In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45961.

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Thermal ageing of cast duplex stainless steel primary loops components (elbows, pump casings and branch connections) is a concern for long-term operation of EDF nuclear power plants. The thermal ageing embrittlement results from the microstructural evolution of the ferrite phase (spinodal decomposition), and can reduce the fracture toughness properties of the steel. In addition, it is necessary to consider manufacturing quality and the possible occurrence of casting defects such as shrinkage cavities. In a context of life extension, it is important to assess the safety margins to crack initiation and crack propagation instability. This paper presents two tests conducted by EDF on aged cast duplex stainless steel NPP components, respectively on a full-scale elbow and a branch connection. The main characteristics of the tests are recalled, the results are presented, and finally, the lessons drawn are summarized. These tests and their detailed analyses contribute to validate and justify the methodology used by EDF in the integrity assessment of in-service cast duplex stainless steel components.

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Folco, G., A. Zagarella, M. B. Gallazzi, C. B. Monti, P. Arrigoni, and P. Randelli. "Inter- and Intrareader Reproducibility of a Novel Instability Score of the Lateral Elbow at CT Arthrography: The SMILE Score." In 29th Annual Scientific Meeting of the European Society of Musculoskeletal Radiology (ESSR). Thieme Medical Publishers, Inc., 2022. http://dx.doi.org/10.1055/s-0042-1750623.

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