Comparison between the conventional Malmström extractor and a new extractor with Silastic cup

Area of Science:

• Obstetrics and Gynecology
• Perinatal Medicine
• Surgical Instruments

Background:

• Instrumental delivery is often necessary for fetal distress or uterine inertia.
• Vacuum extraction is a common method for instrumental delivery.
• Comparing different vacuum extraction devices is crucial for optimizing obstetric outcomes.

Purpose of the Study:

• To compare the efficacy and safety of the Silastic cup versus the conventional Malmström instrument for vacuum-assisted delivery.
• To evaluate extraction time, fetal scalp injuries, and success rates between the two instruments.

Main Methods:

• A randomized controlled trial involving 100 women requiring instrumental delivery.
• Participants were assigned to either the Malmström instrument or the Silastic cup.
• Outcomes included extraction time, fetal scalp injuries, failure rates, and Apgar scores.

Main Results:

• The Silastic cup demonstrated shorter extraction times and fewer fetal scalp injuries.
• However, the Silastic cup exhibited a higher rate of extraction failure, especially in the occiput posterior fetal position.
• No significant differences in Apgar scores were noted between the two groups.

Conclusions:

• The Silastic cup offers advantages in reducing extraction time and fetal scalp trauma.
• Its higher failure rate, particularly in specific fetal positions, necessitates careful consideration.
• Both instruments appear to yield similar neonatal outcomes regarding Apgar scores.