用于阴道助产的新器械的研发与测试。
The development and testing of new instruments for operative vaginal delivery.
作者信息
Elliott B D, Ridgway L E, Berkus M D, Newton E R, Peairs W
机构信息
Department of Obstetrics and Gynecology, University of Texas Health Science Center, San Antonio 78284-7836.
出版信息
Am J Obstet Gynecol. 1992 Oct;167(4 Pt 1):1121-4. doi: 10.1016/s0002-9378(12)80051-2.
OBJECTIVE
Little innovation has occurred in recent years in the instruments available for operative vaginal delivery. The purpose of this study is to develop a technique to test the utility of an investigational device, the obstetric bonnet, and measure the forces it places on the fetal head.
STUDY DESIGN
We constructed a model of the fetal head capable of measuring both compression and vacuum created by an applied device. A total of 18 devices were tested to a maximum traction of 60 pounds.
RESULTS
A significant linear relationship exists between the traction applied and the compression (R2 = 0.42, p = 0.0004) and vacuum (R2 = 0.85, p = 0.0001) created. Compression and vacuum recorded at maximum recommended traction were 1.1 lb/sq in and 31 cm Hg, respectively.
CONCLUSION
These findings explain the mechanics of this interesting device, and demonstrate forces that compare favorably with those known to occur with forceps or vacuum extraction.
目的
近年来，可用于手术阴道分娩的器械几乎没有创新。本研究的目的是开发一种技术，以测试一种研究性器械——产科帽的效用，并测量其对胎儿头部施加的力。
研究设计
我们构建了一个能够测量由应用器械产生的压缩力和真空度的胎儿头部模型。总共对18个器械进行了测试，最大牵引力为60磅。
结果
施加的牵引力与产生的压缩力（R2 = 0.42，p = 0.0004）和真空度（R2 = 0.85，p = 0.0001）之间存在显著的线性关系。在最大推荐牵引力下记录的压缩力和真空度分别为1.1磅/平方英寸和31厘米汞柱。
结论
这些发现解释了这种有趣器械的力学原理，并证明其产生的力与已知的产钳或真空吸引所产生的力相比具有优势。
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