Subtalar arthroscopy using a 2.4-mm zero-degree arthroscope: indication, technical experience, and results

Area of Science:

• Orthopaedic Surgery
• Minimally Invasive Procedures
• Foot and Ankle Anatomy

Background:

• The subtalar joint is anatomically complex, presenting challenges in diagnosis and treatment.
• Advancements in arthroscopic technology, particularly smaller diameter arthroscopes, have improved subtalar joint interventions.
• Subtalar arthroscopy is increasingly utilized for both diagnostic and therapeutic purposes.

Purpose of the Study:

• To evaluate the clinical outcomes of patients undergoing subtalar arthroscopy for various subtalar joint disorders.
• To assess the efficacy of a 2.4-mm zero-degree arthroscope in subtalar joint procedures.
• To analyze functional improvements using the American Orthopaedic Foot & Ankle Society (AOFAS) hindfoot score.

Main Methods:

• A prospective study included 6 patients who underwent subtalar arthroscopy between September 2008 and January 2009.
• A 2.4-mm zero-degree arthroscope was used for all procedures.
• American Orthopaedic Foot & Ankle Society (AOFAS) hindfoot scores were collected preoperatively and at 3 and 6 months postoperatively.

Main Results:

• Mean AOFAS hindfoot scores significantly improved from 49.67 preoperatively to 67.33 at 3 months (P = .03) and 75 at 6 months (P = .004).
• Postoperative diagnoses included arthrofibrosis, osteoarthritis, and osteochondral disease.
• The zero-degree arthroscope facilitated easier instrument manipulation and potentially reduced inventory costs.

Conclusions:

• Subtalar arthroscopy with a 2.4-mm zero-degree arthroscope demonstrates positive outcomes for diagnosing and treating subtalar pathologies.
• Significant functional improvement, as measured by AOFAS scores, is observed early and continues post-procedure.
• The zero-degree arthroscope offers advantages in surgical maneuverability and cost-effectiveness.