Paul M J, Smeltzer J S
Department of Obstetrics & Gynecology, Washington University School of Medicine, St. Louis, Missouri.
Am J Perinatol. 1991 Nov;8(6):417-20. doi: 10.1055/s-2007-999428.
The use of home uterine activity monitoring for patients at high risk for preterm labor and delivery has become common in clinical perinatology. The ability of the monitoring devices to detect accurately uterine contractions in early pregnancy has not previously been reported. Ten women in labor between 20 and 35 weeks' gestation underwent simultaneous monitoring of uterine activity with a guard-ring tocodynamometer and an intrauterine pressure monitor. When compared with internal monitoring, the external monitor detected 90.8% of uterine contractions with a specificity for uterine quiescence of 98.1%. The predictive value of external monitoring was 97.3% for detecting uterine contractions and 93.6% for recording the absence of uterine contractions. The contractions detected externally were similar in duration: mean 63.7 +/- 23.0 seconds for internal monitoring and 62.2 +/- 22.6 seconds for external monitoring (p greater than 0.05). The intensity of contractions detected externally was less than internally measured contractions, mean difference, 19.7 +/- 15.9 mmHg (p less than 0.001). External tocodynamometry using this guarding tocodynamometer reliably distinguishes between uterine contractions and uterine quiescence in preterm pregnancies but does not adequately measure the intensity of contractions.
在家中对早产和分娩高危患者进行子宫活动监测在临床围产医学中已变得很常见。此前尚未有关于监测设备在妊娠早期准确检测子宫收缩能力的报道。对10名妊娠20至35周的临产妇女同时使用护环式宫缩计和宫内压力监测仪进行子宫活动监测。与内部监测相比，外部监测能检测出90.8%的子宫收缩，子宫静止的特异性为98.1%。外部监测检测子宫收缩的预测值为97.3%，记录无子宫收缩的预测值为93.6%。外部检测到的宫缩持续时间相似：内部监测平均为63.7±23.0秒，外部监测为62.2±22.6秒（p>0.05）。外部检测到的宫缩强度小于内部测量的宫缩，平均差值为19.7±15.9 mmHg（p<0.001）。使用这种护环式宫缩计进行外部宫缩图测量能可靠地区分早产妊娠中的子宫收缩和子宫静止，但无法充分测量宫缩强度。
