Factors affecting results after flexor tendon repair in zone II: a multivariate prospective analysis

Area of Science:

• Orthopedic Surgery
• Rehabilitation Medicine
• Biomedical Engineering

Background:

• Flexor tendon repair in zone II presents challenges for functional recovery.
• Early controlled motion is a common rehabilitation strategy.
• Predicting long-term outcomes remains important for patient management.

Purpose of the Study:

• To identify key predictors of functional outcomes 1 year after flexor tendon repair in zone II.
• To determine the influence of early postoperative variables on range of motion and grip strength.

Main Methods:

• A stepwise multiple regression analysis was performed on data from 135 patients.
• 12-13 independent variables were assessed for their influence on five outcome variables.
• Outcomes were measured 1 year after flexor tendon repair with early controlled motion.

Main Results:

• Controlled interphalangeal joint range of motion at 3 weeks postoperatively was the strongest predictor of final active range of motion.
• Age, swelling, number of digits, and number of tendons injured also contributed to predicting active range of motion and extension deficits.
• These factors accounted for 18-19% of the variance in active range of motion and 14-15% in extension deficits.

Conclusions:

• Early interphalangeal joint motion is a critical factor for successful flexor tendon repair outcomes.
• While specific clinical variables are influential, psychological and biological patient factors likely play a significant role in overall recovery.
• Further research into patient-specific characteristics is warranted to optimize rehabilitation protocols.