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Uterine contraction

Everett F Magann, Kinsey I Dinnel, Nader Z Rabie, Amanda L Shoemaker, Nirvana A Manning
BACKGROUND A spontaneous intra-amniotic hemorrhage is rarely encountered during pregnancy. The correct diagnosis and management are problematic because of the infrequency of this condition and the high likelihood of a misdiagnosis. CASE REPORT A primigravida with an uncomplicated pregnancy and a normal targeted ultrasound presented late in the second trimester of pregnancy with antepartum bleeding of unknown origin. A repeat ultrasound was suggestive of an abdominal wall defect (gastroschisis). The patient continued to have antepartum bleeding and developed uterine contractions and abdominal pain necessitating frequent visits to labor and delivery...
October 20, 2016: American Journal of Case Reports
Sarah M Holmen, Tiki Bakhshi, Maria M Molina, Larissa F Weir
BACKGROUND: Chorioamniotic membrane separation (CMS) is a rare finding that is commonly preceded by invasive fetal procedures. The presence of CMS can also be associated with uncommon maternal or fetal conditions as well as preterm delivery, amniotic band syndrome, umbilical cord complications, and fetal and neonatal death. It is classified as a high-risk antepartum condition due to the significant fetal morbidity and mortality that may ensue. CASE REPORT: A 40-year-old gravida 5 para 1212 at 35 weeks presented for antepartum fetal testing...
October 2016: Military Medicine
Chen-Yu Wang, Yu-Ju Lai, Kwei-Shuai Hwang, Chi-Huang Chen, Mu-Hsien Yu, Huei-Tsung Chen, Her-Young Su
OBJECTIVE: Neutropenia developed after continuous intravenous infusion of ritodrine hydrochloride (Yutopar) for preterm uterine contractions in a twin pregnancy. We successfully returned the low neutrophil count to the normal range after discontinuation of infusion of ritodrine and treatment with granulocyte colony stimulating factor (G-CSF). CASE REPORT: A 34-year-old woman with twin pregnancy was treated with ritodrine for preterm uterine contractions at 27 weeks and 6 days gestation...
October 2016: Taiwanese Journal of Obstetrics & Gynecology
Ayaka Kawabe, Liangcheng Wang, Atsuko Kikugawa, Yuko Shibata, Kenichi Kuromaki, Akiyoshi Takagi
OBJECTIVE: Uterine rupture is a rare but serious obstetric complication. However, prediction and diagnosis at an early stage remain difficult. Herein, we report a case of primary uterine rupture found earlier by a specific symptom. CASE REPORT: A 29-year-old patient was scheduled to undergo a cesarean section (CS) due to placenta previa. However, at Week 35, she began experiencing abdominal pain and uterine contractions. Subsequently, she began experiencing severe pain, which was enhanced by fetal movements...
October 2016: Taiwanese Journal of Obstetrics & Gynecology
Eduardo Fernández-Martínez, Héctor Ponce-Monter, Luis E Soria-Jasso, Mario I Ortiz, José-Antonio Arias-Montaño, Guillermo Barragán-Ramírez, Cynthia Mayén-García
Uterine relaxation is crucial during preterm labor. Phosphodiesterase-4 (PDE-4) inhibitors have been proposed as tocolytics. Some thalidomide analogs are PDE-4 inhibitors. The aim of this study was to assess the uterus-relaxant properties of two thalidomide analogs, methyl 3-(4-nitrophthalimido)-3-(3,4-dimethoxyphenyl)-propanoate (4NO2PDPMe) and methyl 3-(4-aminophthalimido)-3-(3,4-dimethoxyphenyl)-propanoate (4APDPMe) and were compared to rolipram in functional studies of spontaneous phasic, K⁺-induced tonic, and Ca(2+)-induced contractions in isolated pregnant human myometrial tissues...
October 7, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
A Mas, L Stone, P M O'Connor, Q Yang, D T Kleven, C Simon, C L Walker, A Al-Hendy
Despite the high prevalence and major negative impact of uterine fibroids (UFs) on women's health, their pathogenesis remains largely unknown. While tumor initiating cells (TICs) have been previously isolated from UFs, the cell of origin for these tumors in normal myometrium has not been identified. We isolated cells with Stro1/CD44 surface markers from normal myometrium expressing stem cell markers Oct-4/c-kit/nanog that exhibited the properties of myometrial stem/progenitor-like cells (MSCs). Using a murine model for UFs, we showed that the cervix was a hypoxic "niche" and primary site (96%) for fibroid development in these animals...
October 14, 2016: Stem Cells
Jerrie S Refuerzo, Fransisca Leonard, Nataliya Bulayeva, David Gorenstein, Giuseppe Chiossi, Alejandra Ontiveros, Monica Longo, Biana Godin
Preterm labor caused by uterine contractions is a major contributor to neonatal morbidity and mortality. Treatment intended to reduce uterine contractions include tocolytic agents, such as indomethacin. Unfortunately, clinically used tocolytics are frequently inefficient and cross the placenta causing fetal side effects. Here we show for the first time in obstetrics the use of a targeted nanoparticle directed to the pregnant uterus and loaded with a tocolytic for reducing its placental passage and sustaining its efficacy...
October 11, 2016: Scientific Reports
Marion W C Vlemminx, Hinke de Lau, S Guid Oei
PURPOSE: Timely diagnosing a uterine rupture is challenging. Based on the pathophysiology of complete uterine wall separation, changes in uterine activity are expected. The primary objective is to identify tocogram characteristics associated with uterine rupture during trial of labor after cesarean section. The secondary objective is to compare the external tocodynamometer with intrauterine pressure catheters. METHODS: MEDLINE, EMBASE, and the Cochrane library were systematically searched for eligible records...
October 8, 2016: Archives of Gynecology and Obstetrics
H Li, M Diao, J Ni, P Li, Q Zhu, Y L Wan, Y S Ma, X M Lin
BACKGROUND: Serotonin (5-HT) is known to play an important role in regulating uterine contractions. However, the specific receptors involved have not been well characterized. We evaluated whether 5-HT3 receptors exist in human myometrium, and their effects on myometrial contractility when stimulated by a 5-HT3 agonist. METHODS: Four tissue samples taken from patients undergoing hysterectomy (n=2) and elective cesarean delivery (n=2) were used to detect expression of 5-HT3 receptors on the myometrium using western blotting...
September 9, 2016: International Journal of Obstetric Anesthesia
Priyanka Jha, Viktoriya Paroder, Winnie Mar, Jeanne M Horowtiz, Liina Poder
Placental masses are uncommonly identified at the time of obstetric ultrasound evaluation. Understanding the pathologies presenting as placental masses is key for providing a differential diagnosis and guiding subsequent management, which may include additional imaging with magnetic resonance (MR) imaging. Potential benign entities include chorioangiomas and teratomas. Larger chorioangiomas can cause fetal cardiovascular issues from volume overload. Placental mesenchymal dysplasia has an association with fetal anomalies and detailed fetal evaluation should be performed when it is suspected...
September 30, 2016: Abdominal Radiology
Pamela Angle, Christine Kurtz Landy, Jasmine Djordjevic, Jon Barrett, Alanna Kibbe, Saiena Sriparamananthan, Yuna Lee, Lydia Hamata, Alex Kiss
OBJECTIVES: The Angle Labor Pain Questionnaire (A-LPQ) is a new, condition-specific, multidimensional psychometric instrument which measures the most important dimensions of women's childbirth pain experiences using 5 subscales: The Enormity of the Pain, Fear/Anxiety, Uterine Contraction Pain, Birthing Pain and Back Pain/Long Haul. This study assessed the A-LPQ's test-retest reliability during early active labor without pain relief. METHODS: Two versions of the A-LPQ were randomly administered during 2 test sessions separated by a 20 minute window...
September 28, 2016: Clinical Journal of Pain
Sung Hye Byun, So Young Lee, Seong Yeon Hong, Taeha Ryu, Baek Jin Kim, Jin Yong Jung
INTRODUCTION: In fetuses who are predicted to be at risk of catastrophic airway obstruction at delivery, the ex utero intrapartum treatment (EXIT) procedure is useful for securing the fetal airway while maintaining fetal oxygenation via placental circulation. Factors, including poor posture of the fetus and physician, narrow visual field, and issues of contamination in the aseptic surgical field, make fetal intubation during the EXIT procedure difficult. Herein, we report our experience of the usefulness of the GlideScope video laryngoscope (GVL) for intubation during the EXIT procedure...
September 2016: Medicine (Baltimore)
Mohammad Ahmed Maher, Tarek Mohammad Sayyed, Nabih Ibrahim Elkhouly
OBJECTIVES: To compare between three different utertonics (oxytocin, carbetocin, and misoprostol) given via three different routes (intra-umbilical, intravenous, and sublingual, respectively) in reducing the need for manual removal of placenta. METHODS: A randomized trial for cases with retained placenta 30 minutes following vaginal delivery. They received intraumbilical oxytocin, intravenous carbetocin, or sublingual misoprostol. Main outcome measures were delivery of the placenta within 30 minutes following drug administration, and need for manual removal of placenta...
September 27, 2016: Journal of Maternal-fetal & Neonatal Medicine
Parisa Yavari Kia, Behzad Baradaran, Mahnaz Shahnazi, Mohammad Asghari Jafarabadi, Vahid Khaze, Shakiba Pourasad Shahrak
BACKGROUND: Preterm birth is a common problem in obstetrics. OBJECTIVE: To measure maternal serum interlukin-6 in mothers with preterm uterine contractions and compare it with cervicovaginal interlukin-6 in the same women. METHODS: In this cross-sectional study, we measured interlukin-6 in the sera and cervicovaginal fluids of 86 women with preterm uterine contractions. All participants had an intact membrane. Interlukin-6 was measured by using ELISA method...
September 2016: Iranian Journal of Immunology: IJI
Michele J Grimm
Childbirth is a complicated biomechanical process that many take for granted. However, the delivery forces generated by a mother (uterine contractions and maternal pushing) are strong and have a significant effect on the body and tissues of the fetus, especially during the second stage of labor. Although most infants are born without negative, force-related outcomes, in some infants the normal forces of labor cause an injury that can have either temporary or permanent sequelae. The biomechanical situation is further complicated when an infant's shoulder impacts the maternal pelvis, which provides increased resistance and creates added stresses within the neonatal body and tissues...
September 21, 2016: Clinical Obstetrics and Gynecology
Braganza Veena, Rajinish Samal, Leeberk R Inbaraj, Carolin Elizabeth George
BACKGROUND: Prostaglandins are popular agents for induction of labour, owing to their dual action of cervical ripening and inducing uterine contractions. Sublingual misoprostol offers high efficacy as it bypasses first-pass metabolism. Researchers have proved that intracervical PGE1 is as effective as PGE2 except for increased caesarean rate and hyperstimulation. Limited knowledge is available on the efficacy of sublingual PGE1 and intracervical PGE2. This study was designed to compare the effectiveness of sublingual PGE1 with intracervical PGE2...
October 2016: Journal of Obstetrics and Gynaecology of India
Stéphanie Corriveau, Simon Blouin, Elyse Burt, Eric Rousseau, Jean-Charles Pasquier
OBJECTIVE: The potency of acute montelukast treatment, a leukotriene receptor antagonist, has been demonstrated as tocolytic on in vitro myometrial contractility. This study assessed the ability of a 48h montelukast treatment to modify in vitro contractions under inflammatory conditions in a pregnant rat model. STUDY DESIGN: Pregnant Sprague-Dawley rats were injected intraperitoneally (gestational days 20-22) with lipopolysaccharides (LPS) 200μg/kg (4 treatments at 12h intervals) alone or combined with montelukast 10mg/kg/day or a saline solution for a 48h period...
August 9, 2016: European Journal of Obstetrics, Gynecology, and Reproductive Biology
Kyu-Sang Kyeong, Seung Hwa Hong, Young Chul Kim, Woong Cho, Sun Chul Myung, Moo Yeol Lee, Ra Young You, Chan Hyung Kim, So Yeon Kwon, Hikaru Suzuki, Yeon Jin Park, Eun-Hwan Jeong, Hak Soon Kim, Heon Kim, Seung Woon Lim, Wen-Xie Xu, Sang Jin Lee, Il Woon Ji
Myometrial relaxation of mouse via expression of two-pore domain acid sensitive (TASK) channels was studied. In our previous report, we suggested that two-pore domain acid-sensing K(+) channels (TASK-2) might be one of the candidates for the regulation of uterine circular smooth muscles in mice. In this study, we tried to show the mechanisms of relaxation via TASK-2 channels in marine myometrium. Isometric contraction measurements and patch clamp technique were used to verify TASK conductance in murine myometrium...
September 2016: Korean Journal of Physiology & Pharmacology
Jorge Andrés Carvajal, María José Zambrano, Nur Mónica Theodor, Luis Emilio Moreno, Thiare Rosario Olguín, Paula Sofía Vanhauwaert, Nevenka Belén Rojas, Ana María Delpiano
Many pharmacological agents have been investigated to manage preterm labor; we postulate that a combination of tocolytic drugs may achieve a better effect in the prevention of uterine contractions without dose-dependent adverse effects. The aim of this study was to evaluate the inhibitory effect of dual combinations of tocolytics in vitro. Human myometrium was obtained during elective cesarean sections (term without labor; n = 40). Myometrial strips were placed in organ baths for the measurement of isometric tension...
September 7, 2016: Reproductive Sciences
Sven Wellmann, Andrea Koslowski, Katharina Spanaus, Roland Zimmermann, Tilo Burkhardt
OBJECTIVE: To test whether an oxytocin challenge test raises neonatal levels of copeptin, the C-terminal portion of proarginine vasopressin, a sensitive stress marker elevated in neonates born by vaginal delivery as opposed to elective cesarean delivery. METHODS: In a randomized controlled trial in women with a singleton pregnancy undergoing elective cesarean delivery at greater than 36 weeks of gestation and no contractions or rupture of membranes, we compared arterial umbilical cord plasma concentrations of copeptin between neonates exposed to an oxytocin challenge test before elective cesarean delivery and those administered saline infusion (placebo group)...
October 2016: Obstetrics and Gynecology
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