Bibliografías temáticas / Active uterine contraction

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Literatura académica sobre el tema "Active uterine contraction"

Autor: Grafiati

Publicado: 14 de diciembre de 2024

Última modificación: 31 de julio de 2025

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Artículos de revistas sobre el tema "Active uterine contraction"

Weiner, C. P., L. P. Thompson, K. Z. Liu, and J. E. Herrig. "Pregnancy reduces serotonin-induced contraction of guinea pig uterine and carotid arteries." American Journal of Physiology-Heart and Circulatory Physiology 263, no. 6 (1992): H1764—H1769. http://dx.doi.org/10.1152/ajpheart.1992.263.6.h1764.

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Because platelet activation and serotonin have been implicated in preeclamptic hypertension, we investigated the effect of pregnancy on the contractile response to this agent. Prior studies have shown that the vascular contractions to norepinephrine, angiotensin II, and thromboxane are reduced during normal pregnancy by the altered release of endothelium-derived vasoactive substances. We hypothesized that the contraction to serotonin would also be reduced during pregnancy by an endothelium-dependent mechanism. Isolated ring segments from uterine and carotid arteries of near-term pregnant and n

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Chiang, Yi-Fen, Hui-Chih Hung, Hsin-Yuan Chen, et al. "The Inhibitory Effect of Extra Virgin Olive Oil and Its Active Compound Oleocanthal on Prostaglandin-Induced Uterine Hypercontraction and Pain—Ex Vivo and In Vivo Study." Nutrients 12, no. 10 (2020): 3012. http://dx.doi.org/10.3390/nu12103012.

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Primary dysmenorrhea is a common occurrence in adolescent women and is a type of chronic inflammation. Dysmenorrhea is due to an increase in oxidative stress, which increases cyclooxygenase-2 (COX-2) expression, increases the concentration of prostaglandin F2α (PGF2α), and increases the calcium concentration in uterine smooth muscle, causing excessive uterine contractions and pain. The polyphenolic compound oleocanthal (OC) in extra virgin olive oil (EVOO) has been shown to have an anti-inflammatory and antioxidant effect. This study aimed to investigate the inhibitory effect of extra virgin o

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Rita Aninora, Novia, Joserizal Seridji, and Meilinda Agus. "Correlation of Calcium Levels With The Strenght of Uterus Contraction on The Active Phase of First Stage Labor." Journal of Midwifery 3, no. 2 (2018): 76. http://dx.doi.org/10.25077/jom.3.2.76-83.2018.

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Contributing factor to uterus contraction mechanism is the imbalance of the extracellular calcium level. When extracellular calcium level is inadequate, response of the myometrium to oxytocin decreased and the calcium influx inter-cell membranes are suppressed, thus inhibit uterine contractions. The aim of this research is to know the correlation between levels of calcium and the strength of uterine contraction in the active phase of first stage labor. This was a cross-sectional analytic correlative study in the Dr. Rasidin Hospital Padang and UPTD Health Laboratory in West Sumatra province, i

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Ducros, Laurent, Philippe Bonnin, Bernard P. Cholley, et al. "Increasing Maternal Blood Pressure with Ephedrine Increases Uterine Artery Blood Flow Velocity during Uterine Contraction." Anesthesiology 96, no. 3 (2002): 612–16. http://dx.doi.org/10.1097/00000542-200203000-00017.

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Background During labor, ephedrine is widely used to prevent or to treat maternal arterial hypotension and restore uterine perfusion pressure to avoid intrapartum fetal asphyxia. However, the effects of ephedrine on uterine blood flow have not been studied during uterine contractions. The purpose of the study was to assess the effects of ephedrine on uterine artery velocities and resistance index using the Doppler technique during the active phase of labor. Methods Ten normotensive, healthy parturients with uncomplicated pregnancies at term received intravenous ephedrine during labor to increa

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Burton, M. J., H. E. Dziuk, M. L. Fahning, and R. Zemjanis. "Myometrial activity during natural and dexamethasone-induced parturition in the cow." American Journal of Veterinary Research 48, no. 1 (1987): 37–44. https://doi.org/10.2460/ajvr.1987.48.01.37.

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SUMMARY Myometrial activity was monitored during natural and dexamethasone-induced parturition in 8 Holstein dairy cattle, using strain gauge transducers. Four gauges were attached to the serosal surface of the gravid uterine horn, dividing it into thirds. Parturition was induced in 2 of 4 heifers and 2 of 4 cows (group 1); the remaining animals were allowed to calve spontaneously (group 2). Chains of low-amplitude contractions (repeated small deviations from base line) were detected before parturition was induced, and these were more common at distended parts of the uterus. Uncharacteristical

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Kuzminykh, Tatyana U., Vera Yu Borisova, Igor P. Nikolayenkov, Georgy R. Kozonov, and Gulrukhsor Kh Tolibova. "Role of biologically active molecules in uterine contractile activity." Journal of obstetrics and women's diseases 68, no. 1 (2019): 21–27. http://dx.doi.org/10.17816/jowd68121-27.

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Hypothesis/aims of study. Myometrial relaxation and contraction require synchronous cellular interactions. At present, it has been established that the coordination of myometrial contractile activity is carried out by a conduction system constructed from gap junctions with intercellular channels. There are no clinical data on inhibiting (nitric oxide synthase) and activating (connexin-43) factors of uterine contractile activity in the myometrium during pregnancy and parturition in the published literature. This study was undertaken to measure the expression levels of nitric oxide synthase, adh

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Kim, Dong Joon, Young Joon Ki, Bo Hyun Jang, Seongcheol Kim, Sang Hun Kim, and Ki Tae Jung. "Clinically relevant concentrations of dexmedetomidine may reduce oxytocin-induced myometrium contractions in pregnant rats." Anesthesia and Pain Medicine 15, no. 4 (2020): 451–58. http://dx.doi.org/10.17085/apm.20036.

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Background: Recently, there have been some trials to use dexmedetomidine in the obstetric field but concerns regarding the drug include changes in uterine contractions after labor. We aimed to evaluate the effects of dexmedetomidine on the myometrial contractions of pregnant rats.Methods: In a pilot study, the contraction of the myometrial strips of pregnant Sprague-Dawley rats in an organ bath with oxytocin at 1 mU/ml was assessed by adding dexmedetomidine from 10-6 to 10-2 M accumulatively every 20 min, and active tension and the number of contractions were evaluated. Then, changes in myomet

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Shin, Young K., Young D. Kim, and Joseph V. Collea. "The Effect of Propofol on Isolated Human Pregnant Uterine Muscle." Anesthesiology 89, no. 1 (1998): 105–9. http://dx.doi.org/10.1097/00000542-199807000-00017.

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Background Propofol is an alternative to thiopental as an intravenous induction agent for cesarean section. Because it has relaxant effects on vascular and other smooth muscles, the authors set out to determine whether propofol has any effect on pregnant human uterine smooth muscle in an isolated preparation. Methods Myometrial specimens were excised from 10 parturients undergoing elective cesarean section. The muscle strips were suspended in tissue baths and isometric tension was recorded. After establishment of rhythmic contractions in the buffer solution as a control, propofol (0.5 to 10 mi

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Setiawati, Intan, Santi Sofiyanti, and Diyan Indrayani. "INTRAPARTUM NIPPLE STIMULATION TO INCREASE CONTRACTION IN PRIMIPARITY: EVIDENCE BASED CASE REPORT." INTERNATIONAL CONFERENCE ON INTERPROFESSIONAL HEALTH COLLABORATION AND COMMUNITY EMPOWERMENT 5, no. 2 (2024): 251–55. http://dx.doi.org/10.34011/icihcce.v5i2.292.

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Introduction Normal labor process duration varies between 4 to 24 hours since the occurrence of uterine contractions which cause changes in the cervix. Adequate contractions are needed to induce labor to proceed normally. The active phase of the first stage of labor is considered more tiring and painful because uterine activity increases. In this phase, there is often an increase in adrenaline production which has the potential to inhibit contractions and delay the labor process. Nipple stimulation is one method that can be used to increase uterine contractions. This technique can stimulate th

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Dabiré, Prosper A., Youssoufou Ouédraogo, Abel A. Somé, et al. "Relaxant Effects of the Aqueous Extract of Excoecaria grahamii (Euphorbiaceae) Leaves on Uterine Horn Contractility in Wistar Rats." BioMed Research International 2021 (April 9, 2021): 1–8. http://dx.doi.org/10.1155/2021/6618565.

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In uterine smooth muscle, the effects of Excoecaria grahamii are not yet documented. To fill this gap, we investigated the pharmacological effect of Excoecaria grahamii on the contraction of the rat isolated uterine horns. The isolated segments were exposed to different concentrations of the aqueous extract of Excoecaria grahamii leaves and pharmacological drugs. The results showed that Excoecaria grahamii aqueous extract decreased the amplitude and frequency by concentration-related manner. I C 50 values were 2.4 and 2.6, respectively, for amplitude and frequency. Our study revealed that the

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Tesis sobre el tema "Active uterine contraction"

Nguyen, Trieu Nhat Thanh. "Modélisation et simulation d'éléments finis du système pelvien humain vers un outil d'aide à la décision fiable : incertitude des données et des lois de comportement." Electronic Thesis or Diss., Centrale Lille Institut, 2024. http://www.theses.fr/2024CLIL0015.

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Cette thèse a développé une approche originale pour quantifier les incertitudes liées aux propriétés hyperélastiques des tissus mous, en utilisant à la fois des probabilités précises et imprécises. Le protocole de calcul a été étendu pour quantifier les incertitudes dans les contractions utérines actives lors des simulations du deuxième stade du travail. De plus, une simulation de la descente foetale a été créée, intégrant des données de contraction utérine active basées sur l'IRM et une quantification d'incertitude associée. L'étude a révélé que l'Expansion du Chaos Polynomial (PCE) non intru

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Capítulos de libros sobre el tema "Active uterine contraction"

Kanagalingam, Devendra. "The management of labour." In Oxford Textbook of Obstetrics and Gynaecology, edited by Sabaratnam Arulkumaran, William Ledger, Lynette Denny, and Stergios Doumouchtsis. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780198766360.003.0026.

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Normal labour is a process of spontaneous expulsion of the fetus, placenta, and membranes at term. This process is initiated by complex endocrine mechanisms that cause uterine contractions which lead to effacement and dilatation of the cervix and descent of the fetus, resulting in delivery. About 10% of women go into labour in the preterm period. The progress is dependent on uterine contractions (power), the size and presentation of the fetus (passenger), and the size of the pelvis (passage). For ease of management, the observed labour is artificially divided into three stages. The partogram i

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G. Yaliwal, Rajasri. "Recent Advances in the Use of Uterotonics for the Prevention of Postpartum Hemorrhage." In Childbirth [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.103083.

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Primary postpartum hemorrhage (PPH) is one of the leading causes of maternal morbidity and mortality worldwide. The most common cause of primary PPH is uterine atony. Various uterotonics have been used over the years for the prevention of PPH. Oxytocin, Ergometrine, Misoprostol, and Carboprost have been extensively studied. Recently, Carbetocin, an analog of Oxytocin has been added to the armamentarium of postpartum hemorrhage. However, the optimal route and dose of these drugs are still being studied. Oxytocin induces superior myometrial contractions when compared with Ergometrine, Carboprost

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Karavitaki, Niki, Shahzada K. Ahmed, and John A. H. Wass. "Disorders of the posterior pituitary gland." In Oxford Textbook of Medicine, edited by Mark Gurnell. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780198746690.003.0245.

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The posterior pituitary produces arginine vasopressin, which has a key role in fluid homeostasis, and oxytocin, which stimulates uterine contraction during birth and ejection of milk during lactation. Cranial diabetes insipidus is the passage of large volumes of dilute urine due to vasopressin deficient synthesis and/or release. The most common cause is lesions of the neurohypophysis or the hypothalamic median eminence damaging the magnocellular neurons. MRI of the neurohypophysis is required to delineate the cause. Mild polyuria can be managed simply by ensuring adequate fluid intake; treatme

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Pal, Aparna, Niki Karavitaki, and John A. H. Wass. "Disorders of the posterior pituitary gland." In Oxford Textbook of Medicine. Oxford University Press, 2010. http://dx.doi.org/10.1093/med/9780199204854.003.1303.

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The posterior pituitary produces arginine vasopressin, which has a key role in fluid homeostasis, and oxytocin, which stimulates uterine contraction during birth and ejection of milk during lactation. Cranial diabetes insipidus is the passage of large volumes (>3 litres/24 h) of dilute urine (osmolality<300 mOsm/kg) due to vasopressin deficiency, and most commonly occurs as a consequence of trauma or tumour affecting the posterior pituitary. Diagnosed by a water deprivation test revealing urine osmolality less than 300 mOsml/kg with concurrent plasma osmolality more than 290 mOsml/kg aft

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Al-Jindi, Piotr, and Bethany Potere. "Tocolytic Drugs." In Advanced Anesthesia Review, edited by Alaa Abd-Elsayed. Oxford University PressNew York, 2023. http://dx.doi.org/10.1093/med/9780197584521.003.0284.

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Abstract Tocolytic agents are agents that inhibit uterine contraction and allow enough time for corticosteroids to help with lung maturation. They are administered in cases of premature labor between the 22nd and 34th weeks of gestational age. They are divided into betamimetics, calcium channel blockers, cyclooxygenase inhibitors, and magnesium sulfate. Betamimetics can be used for a short period of time; their prolonged use is not recommended due to extensive side effects, including maternal death. They are associated with pulmonary edema, tachycardia, arrhythmias, hyperglycemia, and hypokale

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Actas de conferencias sobre el tema "Active uterine contraction"

Barone, William R., Andrew J. Feola, Pam A. Moalli, and Steven D. Abramowitch. "Viscoelastic Behavior of the Rat Uterine Cervix at Mid-Pregnancy." In ASME 2010 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/sbc2010-19527.

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Preterm labor is the leading cause of neonatal mortality and accounts for 70% of the total cost of neonatal health care. Premature softening of the cervix has been identified as one of the primary causes of preterm labor. As the biochemistry of the cervix is distinct between the proximal and distal portions, the objective of this study was to determine the viscoelastic properties of these portions in mid-pregnancy (Day 15–16) relative to virgin Long-Evans rats. This will serve to establish baseline data for future studies that will aim to induce preterm labor in this model. The cervix was divi

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Yoshida, Kyoko, Claire Reeves, Jan Kitajewski, et al. "Anthrax Toxin Receptor 2 Knock-Out and Wild Type Mouse Cervix Exhibit Time-Dependent Mechanical Properties." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80732.

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The cervix plays a critical role during pregnancy, acting as a mechanical barrier to keep the fetus inside the uterus until term. In a normal pregnancy, it is hypothesized that the cervix gradually softens until uterine contractions occur. At this point, the cervix dramatically ripens and dilates for delivery. Similar to other collagenous tissues, the extracellular matrix (ECM) is the load-bearing component of cervical tissue. It is composed mainly of a cross-linked network of fibril forming collagen, types I and III, embedded in a viscous proteoglycan ground substance. Studies conducted on an

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