Complications Following Aseptic Knee Revision Based on Tourniquet Use

Area of Science:

• Orthopedic Surgery
• Arthroplasty Research
• Surgical Outcomes

Background:

• Tourniquet use in revision total knee arthroplasty (rTKA) improves surgical visualization and cement efficacy.
• Concerns include potential for muscle injury, increased pain, wound complications, and venous thromboembolism (VTE).
• This study evaluates clinical outcomes comparing minimal tourniquet use versus standard tourniquet use in aseptic rTKA.

Purpose of the Study:

• To compare clinical outcomes between aseptic revision total knee arthroplasty (rTKA) performed with minimal tourniquet use versus standard tourniquet use.
• To assess the impact of tourniquet use on blood loss, complications, pain, and opioid consumption.
• To determine if tourniquet use influences reoperation rates and venous thromboembolism (VTE).

Main Methods:

• Retrospective matched cohort study of 100 rTKAs with no/minimal tourniquet use and 100 with standard tourniquet use.
• Statistical analysis included Pearson's chi-square tests, Student's t-tests, and Pearson correlation coefficient (r).
• General Linear Model used to identify significant covariates and the impact of tourniquet use.

Main Results:

• No significant differences observed in estimated blood loss or blood transfusion requirements between groups.
• Incidence of major inpatient events, 90-day VTE, wound complications, and reoperations were similar.
• Higher initial opioid requests and use in the standard tourniquet group, despite similar pain scores; however, later pain and opioid use were lower in the standard group.

Conclusions:

• Tourniquet use in aseptic rTKA may not significantly affect blood loss, complications, VTE, or reoperation rates.
• Observed differences in early postoperative pain and opioid use warrant further investigation.
• Individualized tourniquet application based on patient and surgical factors remains the optimal approach for rTKA.