Tourniquet release for hemostasis increases bleeding. A randomized study of 77 knee replacements

Area of Science:

• Orthopedic Surgery
• Surgical Hemostasis
• Clinical Trials

Background:

• Tourniquet use is common in knee replacement surgery to control bleeding.
• The optimal timing for tourniquet release for hemostasis remains debated.
• Understanding blood loss implications is crucial for patient outcomes.

Purpose of the Study:

• To evaluate the impact of tourniquet release timing on blood loss during primary knee replacement.
• To assess the effect on transfusion requirements and hemoglobin levels.
• To determine the efficacy of early versus late tourniquet release for hemostasis.

Main Methods:

• Prospective, randomized study of 77 primary knee replacement operations.
• Patients were divided into two groups based on tourniquet release timing: before or after wound closure.
• Intraoperative and postoperative blood loss, and transfusion needs were meticulously recorded.

Main Results:

• Group I (early release) experienced significantly higher average blood loss (858 mL) compared to Group II (late release) (589 mL) (p = 0.01).
• In cementless prostheses subgroup, early release also correlated with greater blood loss (1022 mL vs. 646 mL) (p = 0.01).
• No significant differences were observed in median blood units transfused or postoperative hemoglobin decrease between groups.

Conclusions:

• Tourniquet release for hemostasis before wound closure in knee replacement surgery is not effective.
• The findings suggest that current practices of early tourniquet release may lead to increased blood loss.
• Further research may be needed to optimize hemostatic strategies in total knee arthroplasty.