Obstetric forceps dimensions and the newborn head biometry: Time for an update

Area of Science:

• Obstetrics
• Medical Device Design
• Neonatal Health

Background:

• Obstetric forceps, designed in the 1600s for severely molded fetal heads during prolonged labor, have dimensions largely unchanged over 400 years.
• Modern obstetric practice aims to avoid protracted labor, making historical forceps design potentially suboptimal.
• Existing forceps dimensions may not align with current newborn head biometry.

Purpose of the Study:

• To re-evaluate and propose optimized dimensions for obstetric forceps.
• To base new dimensions on contemporary newborn head biometry, specifically biparietal and mentovertical diameters.
• To hypothesize that optimized forceps will reduce neonatal complications and improve maternal outcomes.

Main Methods:

• Systematic review of existing literature on forceps design and neonatal outcomes.
• Original measurements of neonatal mentovertical and biparietal diameters using laser scanning technology.
• Correlation analysis between neonatal head biometry and current forceps dimensions.

Main Results:

• Demonstrated a significant discrepancy between historical forceps dimensions and modern neonatal head biometry.
• Identified specific correlations between biparietal diameter and interblade distance, and mentovertical diameter and blade length.
• Established a rationale for redesigning forceps based on these biometric findings.

Conclusions:

• Current obstetric forceps dimensions are outdated and may not be optimal for contemporary newborns.
• Optimizing forceps dimensions based on neonatal head biometry is proposed as a method to reduce delivery complications.
• Further research and clinical trials are warranted to validate the impact of redesigned forceps on neonatal and maternal outcomes.