A Novel Technique to Assess Soft-Tissue Redundancy Over the Proximal Interphalangeal Joint

Area of Science:

• Orthopedic Surgery
• Hand Surgery
• Reconstructive Surgery

Background:

• Failed restoration of proximal interphalangeal joint (PIPJ) motion can be linked to excess soft tissue.
• Quantifying redundant skin is crucial for understanding treatment outcomes.

Purpose of the Study:

• To quantify the area of redundant skin over the proximal interphalangeal joint (PIPJ) in a healthy population.
• To establish normative values for skin redundancy for comparative analysis.

Main Methods:

• A novel technique was used to measure redundant skin in 200 healthy volunteers.
• Skin area over the PIPJ was measured for index, middle, ring, and small fingers.
• A standardized ratio was developed to compare post-traumatic skin redundancy.

Main Results:

• Skin redundancy varied by finger, with greater redundancy in men's ring fingers.
• Body Mass Index (BMI) significantly affected skin redundancy in the middle, ring, and small fingers.
• Normative values for skin redundancy were generated by gender and BMI.

Conclusions:

• Established normative values can help surgeons explain treatment progress.
• These values aid in determining hand therapy effectiveness and optimal surgical timing.
• Understanding soft-tissue equilibrium is key for successful PIPJ motion restoration.