Hess L W, McCaul J F, Perry K G, Howard P R, Morrison J C
Department of Obstetrics and Gynecology, University of Mississippi Medical Center, Jackson.
Obstet Gynecol. 1990 Jul;76(1 Suppl):52S-55S.
Uterine activity monitoring to detect preterm contractions and thus to manage patients in active labor is valuable to the clinician. Uterine activity measured by external devices using the guard ring principle or by standard tocodynamometers has been shown to be accurate concerning the frequency of uterine activity as compared with intrauterine pressure catheter-derived data in the third trimester. In this study, 26 women from 19-34 weeks in documented preterm labor had their uterine activity measured by a standard in-hospital monitor and a Term Guard tocodynamometer simultaneously. The standard monitor reflected 16-91% of the frequency of contractions noted by the Term Guard device, with a reduction in the correlation at gestational ages under 30 weeks. In another 20 patients between 17-36 weeks' gestation, these two methods of external tocodynamometry were compared with a transcervical catheter which measured actual intrauterine pressure and frequency of contractions. There was a good correlation between the Term Guard device and transcervically measured contractions (94.6%). At gestational ages of 28 weeks or less, there was poor performance from standard devices (less than 38% correlation with the intrauterine pressure catheter). These data have important implications for clinicians who monitor preterm patients on an ambulatory basis for early detection of preterm labor and also have clinical impact for the management of patients at early gestational ages in active labor.
监测子宫活动以检测早产宫缩，从而对处于活跃分娩期的患者进行管理，这对临床医生很有价值。与孕晚期通过宫内压力导管获得的数据相比，采用护环原理的外部设备或标准宫缩压力计测量的子宫活动在子宫活动频率方面已被证明是准确的。在本研究中，26名孕周为19 - 34周且记录为早产的女性同时通过标准的院内监测仪和Term Guard宫缩压力计测量子宫活动。标准监测仪反映出的宫缩频率为Term Guard设备记录频率的16% - 91%，在孕周小于30周时相关性降低。在另外20名孕周为17 - 36周的患者中，将这两种外部宫缩测量方法与测量实际宫内压力和宫缩频率的经宫颈导管进行了比较。Term Guard设备与经宫颈测量的宫缩之间存在良好的相关性（94.6%）。在孕周28周及以下时，标准设备表现不佳（与宫内压力导管的相关性小于38%）。这些数据对于在门诊监测早产患者以早期检测早产的临床医生具有重要意义，并且对处于活跃分娩期的早孕患者的管理也具有临床影响。
