What is the Full Form of CST ?
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Contraction Stress Test - A compression stress test (CST) is performed close to the furthest limit of pregnancy (34 weeks' incubation) to decide how well the embryo will adapt to the withdrawals of labor. The point is to incite compressions and screen the embryo to check for pulse irregularities utilizing a cardiotocograph. A CST is one sort of antenatal fetal reconnaissance technique.During uterine compressions, fetal oxygenation is declined. Late decelerations in fetal pulse happening during uterine constrictions are related with expanded fetal passing rate, development hindrance and neonatal discouragement. This test evaluates fetal pulse in light of uterine compressions by means of electronic fetal observing. Uterine movement is checked by tocodynamometer.The CST is utilized for its high bad prescient worth. An adverse outcome is profoundly prescient of fetal prosperity and resistance of work. The test has an unfortunate positive prescient worth with bogus positive outcomes in as numerous as 30% of cases. A positive CST shows high gamble of fetal demise because of hypoxia and is a contraindication to work. Patient's obstetricians generally consider employable conveyance in such situations.This "stress test" is normally not performed assuming there are any indications of untimely birth, placenta praevia, vasa praevia, cervical ineptitude, numerous development, past exemplary caesarian segment. Different contraindications incorporate yet are not restricted to past uterine entry point with scarring, past myomectomy entering the uterine hole, and PROM. Any contraindication to work is contraindication to CST.