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Units for the evaluation of uterine contractility
Author(s) -
PHILLIPS G. F.,
CALDER A. A.
Publication year - 1987
Publication title -
bjog: an international journal of obstetrics and gynaecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.157
H-Index - 164
eISSN - 1471-0528
pISSN - 1470-0328
DOI - 10.1111/j.1471-0528.1987.tb02360.x
Subject(s) - contractility , myometrium , amplitude , measure (data warehouse) , duration (music) , medicine , cardiology , mathematics , biomedical engineering , physics , computer science , uterus , acoustics , optics , database
Summary. An improved system of units is proposed for evaluating the contractile activity of the myometrium. Mean active pressure (in kPa) provides the best overall measure of contractility. This measure is broadly compatible with studies quoting‘uterine activity integral’ in kPa s per 15 min, but may be applied to any period of time. Units are suggested for measuring the amplitude, frequency and duration of contractions. It is shown that these are independent variables, and that mean active pressure is the numerical product of these three components.