Ultrasound Guided Adductor Canal Block Versus Femoral Nerve Block for Quadriceps Strength and Fall-risk

St. Luke's-Roosevelt Hospital Center

Status and phase: Completed; Phase 4

Conditions: Quadriceps Muscle Weakness; Fall Risk; Adductor Muscle Weakness

Treatments: Procedure: Ultrasound Guided Femoral Nerve Block; Procedure: Ultrasound Guided Adductor Canal Block

Study type: Interventional

Funder types: Other

Identifiers

NCT01655277

11-202

Details and patient eligibility

About

Our objective was to determine if an ultrasound guided ACB can preserve quadriceps strength, thus minimizing weakness of knee extension compared with ultrasound guided femoral nerve block. Our primary outcome was the percent of maximum voluntary isometric contraction (MVIC) of knee extension preserved at 30 mins after either an ACB or FNB. Secondary outcomes included MVIC of knee extension at 60 min, hip adduction at 30 and 60 mins, and assessment of fall risk with the Berg Balance Scale (BBS) at 30 minutes.

Enrollment: 16 patients

Sex: All

Ages: 18 to 65 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Adults (>18yrs)
• ASA 1-2

Exclusion criteria

• BMI >30
• Allergy to local anesthetics
• Pre-existing gait disturbance
• Pre-existing neuropathy

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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16 participants in 2 patient groups

Adductor Canal block first

Experimental group

Description:

This arm received an ultrasound guided adductor canal block with 15mL of chloroprocaine 3% followed by motor, sensory and balance assessments. Then the patients received an ultrasound guided femoral nerve block with 15mL of chloroprocaine 3% followed by sensory and motor assessments.

Treatment:

Procedure: Ultrasound Guided Femoral Nerve Block

Procedure: Ultrasound Guided Adductor Canal Block

Femoral nerve block first

Experimental group

Description:

This arm received an ultrasound guided femoral nerve block with 15mL of chloroprocaine 3% followed by motor, sensory and balance assessments. Then the patients received an ultrasound guided adductor canal block with 15mL of chloroprocaine 3% followed by sensory and motor assessments.

Treatment:

Procedure: Ultrasound Guided Femoral Nerve Block

Procedure: Ultrasound Guided Adductor Canal Block