Kushtagi Pralhad, Naragoni Shashibala
Department of Obstetrics & Gynaecology, Kasturba Medical College & Hospital, Manipal.
J Indian Med Assoc. 2002 Apr;100(4):234-6.
Recording of foetal heart tracing on cardiotocogram for 30 minutes was done in 500 women on admission in labour and contraction mediated responses were recorded as labour admission test (LAT). Subjects were also stratified into high or low risk groups based on antenatal factors. Seventy-seven out of 500 labour cases (36 out of 433 cases with reactive, 16 out of 37 with suspicious and 25 out of 30 cases with ominous LATs) manifested foetal distress. Eighty-two per cent of antenatal high risk and 89% of low risk pregnancies showed reactive LATs. The LAT was found to have high specificity (93%) and negative predictive value (91%). However, the sensitivity and positive predictive values were lower (53% and 61% respectively). Patients with pre-existing risk factors showed intrapartum foetal distress by 3 hours of reactive LAT, whereas the ones with no antenatal risk factors did not develop foetal distress till 6 hours after reactive LAT. Reactive LAT tracing is of some predictive value; at least for the first few hours after admission in labour.
对500名入院待产的女性进行了30分钟的胎儿心脏产程图记录，并将宫缩介导反应记录为产程入院试验（LAT）。根据产前因素，受试者还被分为高风险或低风险组。500例分娩病例中有77例（433例反应型病例中的36例、37例可疑病例中的16例以及30例不祥LAT病例中的25例）出现胎儿窘迫。82%的产前高风险妊娠和89%的低风险妊娠显示为反应型LAT。发现LAT具有高特异性（93%）和阴性预测值（91%）。然而，敏感性和阳性预测值较低（分别为53%和61%）。有既往危险因素的患者在反应型LAT出现3小时后出现产时胎儿窘迫，而无产前危险因素的患者在反应型LAT出现6小时后才出现胎儿窘迫。反应型LAT记录具有一定的预测价值；至少在入院待产的最初几个小时内是这样。
