A Comparative Study Between Infraclavicular and Axillary Blocks for Assessment of Motor Power Using Handgrip Dynamometer

NCT ID: NCT05325372

Last Updated: 2023-04-28

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 52 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2022-04-15
• Study Completion Date: 2023-04-26

Brief Summary

Hand Surgery is surgery of the hand, the wrist, and the peripheral nerves of the upper limb. Many different types of surgeries can be performed on the hand, depending on the underlying cause of the problem such as Closed reduction and fixation, Tendon repair, Skin grafts, Skin flaps, Carpal Tunnel Release, and ganglion removal. Hand surgery is usually associated with marked postoperative pain. Ultrasound-guided regional anesthesia is usually performed in patients undergoing hand surgery.

This study aims to compare Ultrasound-guided infraclavicular block and axillary block and assess the degree of motor power and duration by testing hand grip strength using a hydraulic hand dynamometer in patients undergoing hand surgery.

Objectives:

To determine the degree of a motor block using a hydraulic hand dynamometer. To Estimate time needed to regain full motor activity. To identify whether ultrasound-guided axillary block may preserve motor function to a greater extent than infraclavicular blocks.

Detailed Description

This randomized control trial is designed to include (52) patients ASA physical status I, II patients ranging from(18) to(60)years old scheduled for hand surgery

Patients meeting the inclusion criteria will be randomly assigned to receive either:

Group I: axillary block technique (n=26) (group A) GroupII: infraclavicular block technique( n=26)(group B) Anesthesia management After arrival to the anesthetic room, An 18-gauge intravenous cannula will be placed at the forearm contralateral to the operated arm, standard monitoring will be used (non-invasive arterial blood pressure, ECG, pulse oximetry) while performing the block and throughout the surgical procedure. Premedication will be given intravenously in the form of 0.03 mg/kg midazolam. 1 g paracetamol iv will be given for all patients Under aseptic conditions, a preliminary scan will be performed using siemens acuson x 300 ultrasound with 8-14 MHz linear transducer. A 50-mm block needle 22 gauge will be used. (SonoPlex Stim Cannula, Germany) All blocks will be given by one researcher using 20 ml of drug 0.25% bupivacaine (10 ml 0.5% bupivacaine + 10 ml normal saline).

Axillary block

Patients in group A will be placed in the supine position with the arm to be blocked abducted and externally rotated. After sterilization of the axilla, the Ultrasound probe with a linear high frequency (8-14 MHZ) transducer will be placed parallel to the anterior axillary fold at the axilla to identify the axillary artery and to identify the hyperechoic median, ulnar, and radial nerves in relation to the axillary artery. The musculocutaneous nerve which supplies the skin of the lateral side of the forearm had to be blocked also. It is found between the biceps brachii and coracobrachialis muscles. Lidocaine 1% was infiltrated subcutaneously 1 cm lateral to the probe. The needle is inserted in-plane from the anterior aspect and directed toward the posterior aspect of the axillary artery. All four nerves in the axillary region will be blocked. A local anesthetic will be administered adjacent to each of the four nerves (at least 5 ml for each).

Infraclavicular block

Patients in group B will be placed in the supine position with the head turned away from the side to be blocked. The arm is abducted to 90 degrees and the elbow flexed. the skin is disinfected and the transducer is positioned in the parasagittal plane to identify the axillary artery. Surrounding the artery are the three cords of the brachial plexus: the lateral, posterior, and medial cords. The needle is inserted in-plane short-axis technique from the cephalad end of the probe, with the insertion point just inferior to the clavicle. A local anesthetic will be injected posterior to the axillary artery to achieve a U-shaped distribution around the artery (cephalad, caudad, and posterior).

Injection of 5 ml lidocaine 2% will be also used in all patients to eliminate tourniquet pain and pain in the area of distribution of intercostobrachial nerve in case of use of a tourniquet

Block assessment

After completion of all block procedures. A formal assessment of block efficacy will be performed by an independent observer who will be masked to each subject's group allocation every 10 min after needle removal for 30 min. surgery will be started once surgical anesthesia will be achieved at any time point or until 30 min had elapsed. if surgical anesthesia will not be achieved at 30 min the block will be considered failed and general anesthesia will proceed.

Sensory blockade of the musculocutaneous, median, radial and ulnar nerves will be graded according to the previously validated 3 point scale using a cold test: respectively: 0 = no perception, 1 = decreased sensation, or 2 = normal sensation. A successful blockade is defined as a complete sensory blockade (i.e., sensory block score = 0) within 30 minutes of completing the block. If complete sensory blockade will not be achieved within 30 minutes, the affected subject will be excluded from the study and categorized as a block failure. The subject was offered a supplementary nerve block if there is sufficient time before surgery, or general anesthesia will be proceeded to achieve surgical anesthesia.

The procedural time (seconds) for each block will be recorded. This duration is defined as the interval from the ultrasound transducer's first contact with the subject to the time the block needle exit the skin. Block onset time will be recorded (from a completed injection of local anesthetic until loss of cold sensation) Duration of the block will be recorded, defined as the time from completing injection of the local anesthetic till complete recovery of sensory function, i.e., the cold test will be assessed every 30 min in the postoperative period till patient feel the cold sensation

The motor blockade will be assessed by testing patients' handgrip strength using a hydraulic handgrip dynamometer, baseline measurements will be recorded on both the ipsilateral and contralateral sides. hand grip strength will be measured preoperative, 30 min from a block, and after surgery. postoperative change in handgrip strength in the operative limb as a percent reduction of preoperative baseline strength will be measured. The time needed to regain full motor power will be measured.

All patients will be postoperatively monitored in the post-anesthesia care unit (PACU) for 1 h and thereafter discharged to their wards. Post-operative pain at the incision site will be assessed by visual analog scale (VAS) and a score of more than 3 when recorded will be taken as an endpoint for the duration of block and the patient was given supplementary analgesics i.e. Inj. Diclofenac Sodium 1-1.5 mg/kg intramuscular. Subject satisfaction will be assessed with a standardized question scored on a seven-point Likert scale: "Thinking about your nerve blocks, how satisfied were you with them: where 1 is not at all, 4 is neutral, and 7 is completely satisfied?"

Block related complications will be recorded such as failed block, motor weakness 24 h after the block local anesthetic toxicity, vascular puncture, paraesthesia, and pneumothorax.

Conditions

Hand Surgery; Ultrasound Guided

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: PREVENTION
• Blinding Strategy: QUADRUPLE

Study Groups

Ultrasound guided axillary block

the Ultrasound probe with a linear high frequency (8-14 MHZ) transducer will be placed parallel to the anterior axillary fold at the axilla to identify the axillary artery and to identify the hyperechoic median, ulnar, and radial nerves in relation to the axillary artery. The musculocutaneous nerve which supplies the skin of the lateral side of the forearm had to be blocked also. It is found between the biceps brachii and coracobrachialis muscles. Lidocaine 1% was infiltrated subcutaneously 1 cm lateral to the probe. The needle is inserted in-plane from the anterior aspect and directed toward the posterior aspect of the axillary artery. All four nerves in the axillary region will be blocked. A local anesthetic will be administered adjacent to each of the four nerves (at least 5 ml for each).

Group Type: EXPERIMENTAL

axillary block

Intervention Type: PROCEDURE

it will be given using 20 ml of drug 0.25% bupivacaine (10 ml 0.5% bupivacaine + 10 ml normal saline).

Ultrasound guided infraclavicular block block

The transducer is positioned in the parasagittal plane to identify the axillary artery. Surrounding the artery are the three cords of the brachial plexus: the lateral, posterior, and medial cords. The needle is inserted in-plane short-axis technique from the cephalad end of the probe, with the insertion point just inferior to the clavicle. A local anesthetic will be injected posterior to the axillary artery to achieve a U-shaped distribution around the artery (cephalad, caudad, and posterior).

Group Type: EXPERIMENTAL

infraclavicular block

Intervention Type: PROCEDURE

it will be given using 20 ml of drug 0.25% bupivacaine (10 ml 0.5% bupivacaine + 10 ml normal saline).

Interventions

axillary block

it will be given using 20 ml of drug 0.25% bupivacaine (10 ml 0.5% bupivacaine + 10 ml normal saline).

Intervention Type: PROCEDURE

infraclavicular block

it will be given using 20 ml of drug 0.25% bupivacaine (10 ml 0.5% bupivacaine + 10 ml normal saline).

Intervention Type: PROCEDURE

Other Intervention Names

peripheral nerve block; peripheral nerve block

Eligibility Criteria

Inclusion Criteria

1. Gender both males and females

2. ASA Class I, II

3. Age 18-60 years

4. Patients undergoing minor hand surgery (skin graft, Carpal Tunnel Release, ganglion removal, and lipoma ) expected surgical time of more than 15 min and less than one hour.

Exclusion Criteria

1. Allergy to local anesthetic

2. Infection of the skin at the site of block.

3. Bilateral surgery, neck and clavicle deformities, existing neurological disease chronic pain diagnosis, pre-existing nerve damage, muscle injuries, and tendon injury.

4. Coagulopathy, previous surgery on the operative limb, inability to comprehend study-related procedures, and clinically significant cognitive impairment.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 60 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Cairo University

OTHER

Sponsor Role: collaborator

Kasr El Aini Hospital

OTHER

Sponsor Role: lead

Responsible Party

Ahmed nabih youssef

Lecturer of anesthesia (principal investigator)

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Yasser EL Halafawy, professor

Role: STUDY_DIRECTOR

Anesthesia department , Cairo university

Locations

Kasr Alainy, Cairo University

Cairo, , Egypt

Countries

Egypt

Other Identifiers

MS-529-2021

Identifier Type: -

Identifier Source: org_study_id