منابع مشابه
Inhibitory effects of isradipine on uterine contractions in pregnant rats
Objective: To investigate the effects of isradipine, which is a calcium channel blocker, on late pregnant rats’ myometrium under in vitro conditions. Methods: Stripes were obtained from the myometriums of pregnant rats which were decapitated on the 18 days of gestation. The effects of isradipine on myometrium were investigated in four groups and four cumulative doses: 1 ng/ml, 10 ng/ml, 0.1 μg/...
متن کاملShape and Type of Uterine Contractions at Premature Detachment: Uterine Behavior Abruption Placenta
Although premature separation of normally implanted placenta is considered the most serious complication of pregnancy, knowledge of uterine behaviour during this condition is meager, on the basis of electronic recording of intra-uterine pressure two type of contraction pattern has been identified. In type I uterine tonus has values below 30mmHg with a frequency of 4-9 contractions per 10 m...
متن کاملPhysiology and electrical activity of uterine contractions.
Presently, there is no effective treatment for preterm labor. The most obvious reason for this anomaly is that there is no objective manner to evaluate the progression of pregnancy through steps leading to labor, either at term or preterm. Several techniques have been adopted to monitor labor, and/or to diagnose labor, but they are either subjective or indirect, and they do not provide an accur...
متن کاملLinking Myometrial Physiology to Intrauterine Pressure; How Tissue-Level Contractions Create Uterine Contractions of Labor
The mechanisms used to coordinate uterine contractions are not known. We develop a new model based on the proposal that there is a maximum distance to which action potentials can propagate in the uterine wall. This establishes "regions", where one action potential burst can rapidly recruit all the tissue. Regions are recruited into an organ-level contraction via a stretch-initiated contraction ...
متن کاملAlgorithm for Detection of Uterine Contractions from Electrohysterogram
At present, the most widespread method of monitoring of uterine contractions activity during pregnancy and labour is the external tocography. This mechanical method, however, has limited value resulting from its low accuracy and sensibility. Recent progress in new techniques of perinatal monitoring requires more precise method of monitoring uterine activity. The most promising seems to be the e...
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ژورنال
عنوان ژورنال: The Lancet
سال: 1881
ISSN: 0140-6736
DOI: 10.1016/s0140-6736(02)36324-4