《英文msh词典》Vacuum Extraction Deliveries
[入口词] Vacuum Extraction Deliveries
[主题词] Vacuum Extraction,Obstetrical
[英文释义] Removal of the fetus from the uterus or vagina at or near the end of pregnancy with a metal traction cup that is attached to the fetus' head. Negative pressure is applied and traction is made on a chain passed through the suction tube. (From Stedman,26th ed & Dorland,28th ed)