A Coding System for Reoperations Following Total Ankle Replacement and Ankle Arthrodesis

Area of Science:

• Orthopedic Surgery
• Arthroplasty
• Reconstructive Surgery

Background:

• Repeated surgeries indicate primary surgical failure and incur significant costs.
• A standardized system is needed to classify and analyze reoperations in end-stage ankle arthritis.
• Existing classification systems may not adequately capture reoperation details for ankle procedures.

Purpose of the Study:

• To introduce a novel classification system for reoperations following end-stage ankle arthritis surgery.
• To analyze and compare reoperation rates between ankle arthrodesis and total ankle replacement.
• To establish the reliability of the new classification system for clinical use.

Main Methods:

• A prospective cohort study followed 213 ankle arthrodeses and 474 total ankle replacements from 2002-2010.
• Reoperations were identified, operating reports reviewed, and each coded using the new system.
• Inter- and intraobserver reliability of the coding system was assessed by 6 experienced surgeons.

Main Results:

• Overall, 74.8% of procedures required no reoperation.
• Total ankle replacement had a significantly higher reoperation rate (30.2%) compared to ankle arthrodesis (14.1%).
• Reoperations within the ankle joint were more common after total ankle replacement (26.1%) than arthrodesis (4.7%).
• The new coding system demonstrated high interobserver (ICC=0.89) and intraobserver (ICC=0.92) reliability.

Conclusions:

• The proposed classification system is reliable and offers a standardized framework for assessing ankle surgery reoperations.
• The system facilitates a better understanding of reoperation causes, potentially improving future surgical outcomes.
• Higher reoperation rates in total ankle replacement warrant further investigation into failure mechanisms.