新生児生物学ジャーナル

概要

Head to Shoulder Interval in 92 Cases Normal Birth with Good Baby Condition by Two Step Shoulder Delivery Method

Hongyu Zhang and Yi Ling

Purpose of investigation: Observation of natural process of head to shoulder interval by waiting for at least one contraction (two-step method) after head delivered in normal birth.
Method: From 1st to the end of mar. In 2015 at Haikou maternal and child hospital in China, women in vaginal delivery meet the criteria were recorded by video from head crown to shoulder and to body delivered. 92 cases normal vaginal birth with normal baby condition were recorded, video tapes were transfer to computer then replayed and observed. Interval of head crown to head delivery and head to shoulder delivery, babies' activities during birth were recorded from video at same time.
Result: 1. The mean time of head to shoulder interval by waiting for a contraction is (71.043 ± 61.015) sec, mean+2Std. =193.073sec, 95% CI (15.65-229.15) sec. 2. 55.43 % (51/92) percent interval of head to shoulder were less than 60 sec, 39.1% (36/92) were over 60sec and less than 190 sec. 5.4 %( 5/92) over 190 sec. 3. 71.734% (66/92) shoulders were emerged from perineum, 15.217% (14/92) transversely, 13.04% (12/92) emerged from under pubic. 4. 22 % percent babies breathed before shoulder delivery, some after, some did not cry at all, but had normal heartbeat and breath Patten.
Conclusion: 1. Head to shoulder delivery interval is longer than 60 sec by two step method of shoulder delivery. The majority shoulders emerged from perineum rather from under pubic. 96.73% (89/92) cases shoulders were delivered at the first contraction after head delivered, only 3.27% (3/92) cases had delivered by twice contractions. 2. Babies activities during delivery of shoulder included breath, making faces, sucking, bubble from noses and mouth, and the color of the face, all those signs indicated the normal live birth.