The minimum effective midthigh tourniquet pressure

Area of Science:

• Orthopedic Surgery
• Surgical Hemostasis
• Neurophysiology

Background:

• Tourniquet use in lower extremity surgery is common for achieving a bloodless field.
• Inadequate tourniquet pressure can lead to insufficient hemostasis, while excessive pressure risks nerve injury.
• Determining the minimum effective tourniquet pressure is crucial for balancing surgical efficacy and patient safety.

Purpose of the Study:

• To establish the minimum effective midthigh tourniquet pressure required for optimal hemostasis during lower extremity surgery.
• To identify a pressure threshold that minimizes the risk of nerve compression and subsequent nerve damage.

Main Methods:

• Investigated various tourniquet pressures applied at the midthigh level of the operated extremity.
• Determined the lowest tourniquet pressure that successfully achieved adequate hematosis (bloodlessness).

Main Results:

• The minimum effective tourniquet pressure was established at 90-100 mm Hg above the preoperative systolic arm pressure.
• This resulted in an average tourniquet pressure of 210 mm Hg for effective surgical hemostasis.

Conclusions:

• A midthigh tourniquet pressure of 90-100 mm Hg above systolic arm pressure is effective for lower extremity surgery.
• This pressure range aids in preventing nerve damage by avoiding excessive compression while ensuring adequate hemostasis.