Dyack C
Obstet Gynecol. 1980 Jul;56(1):123-6.
A series of consecutive midforceps rotations performed using purely rotational forceps is anslyzed. Leff forceps were designed to make forceps application less difficult and rotation less traumatic to mother and fetus. In many cases, rotation was done under local anesthesia and delivery was completely by traction with Simpson or outlet forceps. Cesarean section was done in 4 cases in which easy rotation and delivery were not possible.
对一系列使用纯旋转产钳进行的连续中位产钳旋转进行了分析。左产钳的设计目的是使产钳应用更轻松，对母亲和胎儿的旋转创伤更小。在许多情况下，旋转是在局部麻醉下进行的，分娩完全通过使用辛普森产钳或出口产钳牵引完成。有4例因无法轻松旋转和分娩而进行了剖宫产。
