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Uterine contraction

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https://www.readbyqxmd.com/read/29240650/oxytocin-use-in-labor-legal-implications
#1
Susan Drummond
Oxytocin is one of the most commonly used medications in obstetrics and has been associated with claims of negligence in cases of adverse outcomes. Errors involving intravenous oxytocin administration for induction or augmentation of labor are most commonly dose related and include failure to avoid or treat tachysystole or failure to asses or treat a fetal heart rate pattern indicative of disruption in oxygenation. Clinicians should be knowledgeable regarding pharmacokinetics of oxytocin and the effect of uterine contractions on fetal oxygenation as well as safe titration of oxytocin to achieve the desired effect while minimizing harm...
December 13, 2017: Journal of Perinatal & Neonatal Nursing
https://www.readbyqxmd.com/read/29229922/comparison-of-electrohysterogram-signal-measured-by-surface-electrodes-with-different-designs-a-computational-study-with-dipole-band-and-abdomen-models
#2
Pei Gao, Dongmei Hao, Yang An, Ying Wang, Qian Qiu, Lin Yang, Yimin Yang, Song Zhang, Xuwen Li, Dingchang Zheng
Non-invasive measurement of uterine activity using electrohysterogram (EHG) surface electrodes has been attempted to monitor uterine contraction. This study aimed to computationally compare the performance of acquiring EHG signals using monopolar electrode and three types of Laplacian concentric ring electrodes (bipolar, quasi-bipolar and tri-polar). With the implementation of dipole band model and abdomen model, the performances of four electrodes in terms of the local sensitivity were quantified by potential attenuation...
December 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29217922/effect-of-solanum-nigrun-on-uterus-of-non-gravid-rats
#3
Freddy O Agoreyo, B Rita Ohimai, Magdalene I Omigie
Background: Solanum nigrum is a widely used plant in oriental medicine where it is considered to be antioxidant, anti- inflammatory and diuretic. This study aimed to evaluate the effect of Solanum Nigrum on uterine contractions. Method: Female Wistar Wister albino rats were used for the study. They were housed in a single large cage in an atmospheric controlled environment. Twenty-four hours before every experiment, 0.2 mg/kg of diethylstilbesterol constituted in 1:1 ethanol/water solution, was administered intraperitoneally as a pre-treatment to the rats to induce oestrus...
May 2017: Ethiopian Journal of Health Sciences
https://www.readbyqxmd.com/read/29216912/changes-in-salivary-oxytocin-after-inhalation-of-clary-sage-essential-oil-scent-in-term-pregnant-women-a-feasibility-pilot-study
#4
Yuriko Tadokoro, Shigeko Horiuchi, Kaori Takahata, Takuya Shuo, Erika Sawano, Kazuyuki Shinohara
OBJECTIVES: This pilot study using a quasi-experimental design was conducted to evaluate the feasibility (i.e., limited efficacy, practicality, and acceptability) of our intervention protocol involving inhalation of the scent of clary sage essential oil by pregnant women and measurement of their preinhalation and postinhalation oxytocin levels. RESULTS: Participants were women of singleton pregnancies between 38 and 40 gestation weeks (N = 11). The experiment group (n = 5) inhaled the scent of clary sage essential oil diluted 50-fold with 10 mL of odorless propylene glycol for 20 min...
December 8, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29216636/reduction-of-uterine-perfusion-pressure-induced-redistribution-of-endothelin-receptor-type-b-between-the-intima-and-media-contributes-to-the-pathogenesis-of-pregnancy-induced-hypertension
#5
Yuan Sun, Xicheng Zhang, Zhaolei Chen, Miao Xu, Minghui Ou
BACKGROUND/AIMS: Studies have shown that a change in endothelin receptor expression in the artery is related to pregnancy-induced hypertension (PIH). However, the mechanism underlying this change remains unclear. METHODS: To test whether the distribution of endothelin receptor type-A (ETAR) and type-B (ETBR) plays an important role in PIH, a reduction of uterine perfusion pressure (RUPP) rat model was used to mimic some of the features of PIH; the resulting variable endothelin receptor expression was investigated in the media and intima of the aorta...
December 6, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29208689/gestation-changes-sodium-pump-isoform-expression-leading-to-changes-in-ouabain-sensitivity-contractility-and-intracellular-calcium-in-rat-uterus
#6
Rachel V Floyd, Ali Mobasheri, Susan Wray
Developmental and tissue-specific differences in isoforms allow Na+, K+-ATPase function to be tightly regulated, as they control sensitivity to ions and inhibitors. Uterine contraction relies on the activity of the Na+, K+ATPase, which creates ionic gradients that drive excitation-contraction coupling. It is unknown whether Na+, K+ATPase isoforms are regulated throughout pregnancy or whether they have a direct role in modulating uterine contractility. We hypothesized that gestation-dependent differential expression of isoforms would affect contractile responses to Na+, K+ATPase α subunit inhibition with ouabain...
December 2017: Physiological Reports
https://www.readbyqxmd.com/read/29207782/prediction-of-delivery-in-women-with-threatening-preterm-labour-using-phosphorylated-insulin-like-growth-factor-binding-protein-1-and-cervical-length-using-transvaginal-ultrasound
#7
Amrita Kumari, Vandana Saini, P K Jain, Mamta Gupta
Introduction: Preterm delivery remains a challenge in Obstetrics as it is responsible for significant cause of perinatal morbidity and mortality. At present there is no standard test for prediction of preterm labour for timely referral to a center with NICU facilities. Aim: To evaluate the effectiveness of the cervical phosphorylated insulin like growth factor binding protein-1(phIGFBP-1), cervical length measurement and combination of phIGFBP-1 with cervical length for Predicting Preterm Labour (PTL)...
September 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/29196050/alpha-tocopherol-succinate-increases-cyclooxygenase-2-activity-tissue-specific-action-in-pregnant-rat-uterus-in-vitro
#8
Anna Kothencz, Judit Hajagos-Tóth, Adrienn Csányi, Róbert Gáspár
AIMS: Lipid soluble vitamin E plays a role in several physiological mechanisms, however, the mechanism of this action is controversial. We investigated how tocopherol (α-tocopherol acid succinate) influences the effects of cyclooxygenase inhibitors (COXi) in the smooth muscles. MAIN METHODS: The contractility of the samples from 22-day-pregnant myometrium and non-pregnant myometrium and trachea was determined in an isolated organ bath in vitro. The activity of cyclooxygenase enzymes (COX) was also measured in the tissues...
November 28, 2017: Life Sciences
https://www.readbyqxmd.com/read/29191291/tocolysis-present-and-future-treatment-options
#9
REVIEW
Joshua D Younger, Elena Reitman, George Gallos
In the United States, the generally accepted indication for tocolytic therapy centers on suppression of preterm labor. This may be in the form of preventative therapy with progesterone in women with prior spontaneous preterm birth or as an acute intervention to suppress established uterine contractions associated with cervical change occurring at less than 37 weeks gestation. This article seeks to apply this perspective to tocolytic therapy. Here, we provide a review of current tocolytic options and what the last decade of discovery has revealed about the regulation of myometrial excitability and quiescence...
December 2017: Seminars in Perinatology
https://www.readbyqxmd.com/read/29190763/in-vitro-activity-of-spirulina-platensis-water-extract-against-different-candida-species-isolated-from-vulvo-vaginal-candidiasis-cases
#10
Antonella Marangoni, Claudio Foschi, Matteo Micucci, Rogers Alberto Nahui Palomino, Tullia Gallina Toschi, Beatrice Vitali, Luca Camarda, Mara Mandrioli, Marta De Giorgio, Rita Aldini, Ivan Corazza, Alberto Chiarini, Roberto Cevenini, Roberta Budriesi
The high incidence of vulvo-vaginal candidiasis, combined with the growing problems about azole resistance and toxicity of antifungal drugs, highlights the need for the development of new effective strategies for the treatment of this condition. In this context, natural compounds represent promising alternatives. The cyanobacterium Spirulina platensis, a blue-green alga, exhibits antimicrobial activities against several microorganisms. Nevertheless, only few data about the antifungal properties of Spirulina platensis are available and its potential toxic effects have not been largely investigated...
2017: PloS One
https://www.readbyqxmd.com/read/29175179/effects-of-oxytocin-and-pgf2%C3%AE-on-uterine-contractility-in-cows-with-and-without-metritis-an-in-vitro-study
#11
M Heppelmann, J Volland, C Pfarrer, M Kietzmann, W Bäumer, S Merbach, H-A Schoon, O Wellnitz, M Schmicke, M Hoedemaker, H Bollwein
The aim of this study was to investigate the effects of PGF2α and oxytocin in vitro on myometrial contractility in puerperal uteri. Thirteen puerperal uteri were removed and perfused after euthanasia of cows with (n=7) and without metritis (n=6). Measurement of uterine contractility was done using four piezoelectric crystals, which were implanted into the myometrium along the greater curvature of the uterine horn where fetal implantation occurred during the previous pregnancy. After 30min of equilibration, oxytocin (5 IU) or PGF2α (2...
November 23, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/29154916/acute-intravenous-exposure-to-silver-nanoparticles-during-pregnancy-induces-particle-size-and-vehicle-dependent-changes-in-vascular-tissue-contractility-in-sprague-dawley-rats
#12
A K Vidanapathirana, L C Thompson, M Herco, J Odom, S J Sumner, T R Fennell, J M Brown, C J Wingard
The use of silver nanoparticles (AgNP) raises safety concerns during susceptible life stages such as pregnancy. We hypothesized that acute intravenous exposure to AgNP during late stages of pregnancy will increase vascular tissue contractility, potentially contributing to alterations in fetal growth. Sprague Dawley rats were exposed to a single dose of PVP or Citrate stabilized 20 or 110nm AgNP (700μg/kg). Differential vascular responses and EC50 values were observed in myographic studies in uterine, mesenteric arteries and thoracic aortic segments, 24h post-exposure...
November 20, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/29145270/study-on-the-adverse-effects-following-chemotherapy-for-breast-cancer-diagnosis-during-pregnancy-the-first-case-report-in-china
#13
Xin Ye, Qi He, Xiaoyun Zhou
RATIONALE: Treatment of breast cancer during pregnancy (BCP) remains a challenge to physicians. Surgery and chemotherapy during pregnancy are widely used for the treatment of BCP. Herein, we reported 3 Chinese patients with BCP who underwent chemotherapy during pregnancy and were followed up for adverse effects. PATIENT CONCERNS: Three female patients (case 1, case 2, and case 3) of 37-, 32-, and 28-year-old with breast masses were enrolled. Case 1 had been pregnant for over 4 months, case 2 over 7 months, and case 3 for 7 months...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29142394/antioxidant-phytochemicals-of-opuntia-ficus-indica-l-mill-cladodes-with-potential-anti-spasmodic-activity
#14
Francesco Lanuzza, Francesco Occhiuto, Maria Teresa Monforte, Maria Marcella Tripodo, Valeria D'Angelo, Enza Maria Galati
Background: Opuntia ficus-indica (OFI) (L.) Mill. (Cactaceae), a plant widespread in dry regions of the world, shows interesting biological activities (cicatrizant, antiulcer, anti-inflammatory, and hypolipidemic) and is widely used in traditional medicine. Objectives: Phytochemical analysis and antispasmodic effect of wild OFI cladodes were carried out. Material and Methods: Polyphenols and Vitamin E occurrence, in antioxidant pool of OFI cladodes, were quantified by high-performance liquid chromatography...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29141373/-a-concentration-response-observation-of-hydromorphone-combined-with-ropivacaine-in-labor-analgesia
#15
Y Y Lu, H Huang, W L Mao, R H Liu, M J Hu, L X Shao, M P Hu, J Li
Objective: To investigate the median effective dose (ED(50)) of hydromorphone and the appropriate concentration of ropivacaine combined with hydromorphone in epidural labor analgesia. Methods: One hundred and forty nulliparous women undergoing labor selected for delivery with epidural analgesia were enrolled in our hospital from January to June 2016. The first of top 50 women received 0.12% ropivacaine plus 20 μg/ml hydromorphone complex solution, then sequential women were used the modified sequential method to determine the ED(50) and ED(95) of hydromorphone...
November 14, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29131096/women-serum-concentrations-of-the-il-10-family-of-cytokines-and-ifn-%C3%AE-decrease-from-the-third-trimester-of-pregnancy-to-active-labor
#16
José Javier Reyes-Lagos, Miguel Ángel Peña-Castillo, Juan Carlos Echeverría, Gilberto Pérez-Sánchez, Samantha Álvarez-Herrera, Enrique Becerril-Villanueva, Lenin Pavón, Rodrigo Ayala-Yáñez, Ramón González-Camarena, Gustavo Pacheco-López
Labor is regarded as increased myometrial activity with a regular contractility pattern. At this final stage of pregnancy, myometrial quiescence is lost, accompanied by altered immune homeostasis. It is well known that the interleukin (IL)-10 family of cytokines modulates immunological responses mainly in epithelial cells, including the endometrium. To investigate their inflammatory profile during labor, we performed a longitudinal study in a group of healthy pregnant women (n = 20) with uncomplicated pregnancies in the third trimester of pregnancy and during active labor...
2017: Neuroimmunomodulation
https://www.readbyqxmd.com/read/29127939/alkaloids-and-flavonoid-glycosides-from-the-aerial-parts-of-leonurus-japonicus-and-their-opposite-effects-on-uterine-smooth-muscle
#17
Juan Liu, Cheng Peng, Qin-Mei Zhou, Li Guo, Zhao-Hua Liu, Liang Xiong
The crude extract and some Chinese patented medicines of Leonurus japonicus Houtt. have been proven to affect the uterine smooth muscle. L. japonicus injection is widely used in obstetric departments in China for treating postpartum hemorrhage caused by uterine inertia. Bioassay-guided isolation of the 95% EtOH extract of L. japonicus yielded four cyclopeptides, nine alkaloids, and three flavonoid glycosides, including two previously undescribed cyclopeptides, namely, cycloleonuripeptide G and cycloleonuripeptide H...
November 8, 2017: Phytochemistry
https://www.readbyqxmd.com/read/29123862/management-of-maternal-anaphylaxis-in-pregnancy-a-case-report
#18
Yasunobu Tsuzuki, Mitsuo Narita, Masayuki Nawa, Urara Nakagawa, Toshiaki Wakai
Case: A 26-year-old woman (gravida 2, para 1) at 25 weeks' gestation was brought to the emergency department because of anaphylactic symptoms. She reported eating Japanese soba and developed symptoms of dyspnea, generalized itchy rash, abdominal pain, and severe uterine contractions within 15-30 min of eating. She was immediately treated by normal saline infusion, two injections of epinephrine (intramuscularly), and a nebulized short-acting β2-receptor agonist, followed by H1-antihistamine and methylprednisolone...
April 2017: Acute Medicine & Surgery
https://www.readbyqxmd.com/read/29123430/the-use-of-invos%C3%A2-somatic-oximetry-to-measure-variations-in-placental-tissue-oxygenation-in-laboring-healthy-term-parturients-with-epidural-analgesia-an-observational-study
#19
Christian Loubert, Mélissa Ouellette, Valérie Zaphiratos, Issam Tanoubi
Purpose: Near-infrared spectroscopy provides a non-invasive continuous real-time monitoring of tissue oxygen saturation. As uterine contractions during labor may be associated with a transient uteroplacental hypoperfusion, this prospective, observational study investigates the ability of near-infrared spectroscopy to detect variation in uteroplacental oximetry during uterine contractions. Patients and methods: Four Invos™ oximetry probes (Medtronic(®), Minneapolis, MN, USA) per subjects were applied on the placental surface (PLA), the abdomen (MYO), the forearm (ARM) and the leg (LEG), of twenty healthy laboring parturients with epidural analgesia...
2017: Medical Devices: Evidence and Research
https://www.readbyqxmd.com/read/29119736/yimu-san-improves-obstetric-ability-of-pregnant-mice-by-increasing-serum-oxytocin-levels-and-connexin-43-expression-in-uterine-smooth-muscle
#20
Qi-Huan Wang, Shuang Zhang, Li-Meng Qin, Wen-Jun Zhang, Feng-Hua Liu, Jian-Qin Xu, Yun-Fei Ma, Ke-Dao Teng
Prolonged farrowing remains one of the critical challenges in intensive pig farming. This study aims to explore the effects and mechanism of Yimu San (YMS), a Chinese veterinary medicine micro mist, on delivery ability with mouse models. Thirty-two pregnant mice were randomly divided into a control group and low-YMS, med-YMS, and high-YMS groups. The labor process time and stillbirth rate were recorded, the levels of serum oxytocin and prostaglandin E2 (PGE2) were measured with enzyme-linked immunosorbent assay (ELISA)...
2017: Journal of Zhejiang University. Science. B
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