Measuring Forces in Suture Techniques for Wound Closure

Area of Science:

• Dermatology
• Surgical Techniques
• Biomechanical Analysis

Background:

• Sutures are primary for wound closure, but improper technique can impair healing.
• High-tension wound management lacks detailed mechanical property data for various suture techniques.
• Preventable complications include dehiscence, infection, and ischemic necrosis due to excessive tension.

Purpose of the Study:

• To compare the forces exerted by five common suture techniques.
• To evaluate these forces within a standardized wound tension model.
• To provide mechanical insights for selecting appropriate suture methods.

Main Methods:

• A standardized neoprene wound model was developed using the ForceTRAP system (0-20 N).
• Five suture techniques (single, horizontal mattress, vertical mattress, pulley, modified pulley) were tested.
• Pulling forces were measured using a Hook-in-Force sensor, with 10 repetitions per technique by three operator levels.

Main Results:

• Mean maximum pulling forces varied significantly: pulley (3.46 N), modified pulley (4.52 N), single (5.69 N), vertical mattress (7.25 N), and horizontal mattress (8.11 N).
• The mean force increase on the skin ranged from 0.80 N (pulley) to 0.96 N (vertical mattress).
• The pulley suture demonstrated the lowest mean maximum pulling force.

Conclusions:

• The pulley suture technique requires significantly less pulling force compared to single, horizontal mattress, and vertical mattress techniques.
• Mechanical properties of suture techniques are critical factors in wound healing and complication prevention.
• Consideration of these biomechanical properties can guide the selection of optimal suture methods for different wound types.