Comparison between metal cup and silicone rubber cup vacuum extractor.

A total of 400 primiparous patients who were delivered by vacuum extractor were studied. The patients were divided in two groups: Group A included 200 patients who were delivered by metal cup vacuum extractor and Group B consisted of 200 patients who were delivered by rubber cup vacuum extractor. There were no statistically significant differences in the mean maternal age, mean gestational age, mean neonatal birth weight, indications for operative delivery, occipital positions and head stations between the two groups. No differences were found in the rates of birth canal trauma (11% vs. 12.5%), major neonatal scalp trauma (6.5% vs. 5.5%), neonatal jaundice (15.5% vs. 13.5%) and Apgar score. From this study we can conclude that both metal and silicone cups are equally satisfactory for vacuum extraction.