Femoral Artery Block for Reduction of Tourniquet Induced Hypertension

Hospital da Luz, Portugal

Status: Not yet enrolling

Conditions: Hypertension; Anesthesia, Conduction; Tourniquets; Anesthetics, Local

Treatments: Other: Femoral artery block

Study type: Interventional

Funder types: Other

Identifiers

NCT05954689

U1111-1293-7325

Details and patient eligibility

About

A randomised controlled trial to assess the impact of femoral artery block on the incidence of tourniquet hypertension in patients receiving cruciate ligament surgery with > 30 minutes of tourniquet under combined anaesthesia (balanced general anaesthesia and femoral nerve blocks).

Enrollment: 50 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• American Society of Anesthesiologists (ASA) physical status I to III
• Receiving cruciate ligament surgery with > 30 minutes of tourniquet
• Combined anesthesia (balanced general anesthesia and femoral nerve block)

Exclusion criteria

• Nerve block contraindications (block site infection, allergic to local anesthetic)
• Tourniquet contraindications (peripheral vascular disease or neuropathy, previous arterial bypass graft)
• Tourniquet inflation time < 30 min
• Patient refusal
• Pregnant patients
• Patients with a active psychiatric disease.

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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50 participants in 2 patient groups

Femoral artery block

Experimental group

Description:

An experienced Anesthesiologist will perform the femoral blocks, under ultrasound guidance with a linear probe and a 50mm (millimeters) or 80mm needle. No nerve stimulator will be used during the block. In both groups, femoral nerve block at the nerve sheath will be performed with 20mL (milliliters) 0.5% ropivacaine. In the interventional group, additionally to the previous block, the needle will be retracted and advanced to the antero-medial side of the femoral artery where 10mL 0.5% ropivacaine will be injected after negative aspiration.

Treatment:

Other: Femoral artery block

No intervention

No Intervention group