Adductor Canal Mid-thigh and Adductor Canal Distal Thigh: Is Cutaneous Sensory Blockade Similar Among Block Techniques?

• Status: Terminated
• Trial end date: 2020-03-23
• Target enrollment: 0
• Participant gender: All

Summary

This is a randomized noninferiority interventional study to determine the equivalence of two adductor canal block (ACB) methods: mid-thigh and distal thigh in patients undergoing medial foot, medial ankle, or medial leg surgery. Sixty eight patients will be identified during their orthopedic presurgical clinic visit, anesthesia preoperative clinic visit or Day Surgery Unit (Zale Lipshy Hospital, Clements University Hospital, and University of Texas Southwestern Outpatient Surgery Center) for eligibility. Eligible individuals may be introduced to the study in the orthopedic presurgical clinic or the anesthesia preoperative clinic by staff. After consent patients will be randomized (break-seal method) to receive either a mid-thigh or distal thigh block using ropivacaine prior to foot, ankle, or leg surgery. The following measurements will be obtained to determine the change in sensory distribution: pinprick test with Neuropen, maximum voluntary isometric contraction before and after block, postoperative pain scores (24 hrs and at discharge) and postoperative opiate consumption.

• Phase: Phase 4
• Accepts Healthy Volunteers?: Accepts Healthy Volunteers

Details

• Lead Sponsor: University of Texas Southwestern Medical Center
• Treatments: Ropivacaine

Criteria

Inclusion Criteria:

• Adults aged 18 years or older

• Individuals undergoing surgery of the medial foot, medial ankle, or medial leg for which the anesthetic plan includes an adductor canal nerve block

Exclusion Criteria:

1. Any known deficit of the ipsilateral lumbar nerve roots, ipsilateral lumbar plexus, ipsilateral femoral nerve, obturator nerve or saphenous nerve including diabetic peripheral neuropathy

2. Any local disorder of the skin or otherwise where blockade is to be performed

3. Body mass index >50

4. American Society of Anesthesiologists (ASA) classification greater than 3

5. Allergy to amide local anesthetic medications

6. Pregnancy

7. Incarceration

8. Inability to understand study procedures including inability to understand the English language