USG Block of Cutaneous Nerves of the Arm

Completed

• Conditions: Nerve Block
• Interventions: Procedure: Ultrasound-Guided Plane Block; Procedure: Conventional Block

• Registration Number: NCT03928574
• Lead Sponsor: Cangzhou Hospital of Integrated Traditional Chinese and Western Medicine

Brief Summary

For superficial surgery of anteromedial and posteromedial surfaces of the upper arm, the medial brachial cutaneous nerve (MBCN) and the intercostobrachial nerve (ICBN) must be selectively blocked, in addition to an axillary brachial plexus block. We compared efficacy of ultrasound-guided (USG) versus conventional block of the MBCN and the ICBN.

Detailed Description

The primary objective of our study was to compare the effectiveness of conventional and USG blocks of the MBCN and the ICBN in the axillary fossa. Our hypothesis was that the proportion of patients with complete anesthesia in the entire posteromedial and anteromedial surface of the arm would be greater if a USG technique were used, compared with a conventional technique. The secondary objectives were onset time of complete anesthesia, volume of local anesthetic used for the procedure, tourniquet tolerance during surgery, and ultrasound visibility of MBCN and ICBN.

Study Timeline

• Study First Submitted: 2018-05-08
• Status Verified: 2019-04
• Study Start: 2019-04-01
• Study First Submitted QC: 2019-04-25
• Study First Posted: 2019-04-26
• Primary Completion: 2021-05-01
• Study Completion: 2021-07-01
• Last Update Submitted: 2024-04-08
• Last Update Posted: 2024-04-09

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 200

Inclusion Criteria

• Surgery of the distal upper limb : hand, forearm, lower third of the arm ,including the elbow
• Urgent or planned surgery
• Locoregional anesthesia : axillary brachial plexus block, completed by a medial brachial cutaneous nerve block and an intercostobrachial nerve block

Exclusion Criteria

• Refused to sign informed consent
• Pregnant women
• Allergic to the local anesthetic

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Ultrasound-Guided	Ultrasound-Guided Plane Block	Ultrasound-Guided Plane Block
Conventional	Conventional Block	Conventional Block

Primary Outcome Measures

Name	Time	Method
Number of participants with complete anesthesia	At time 20 minutes after the medial brachial cutaneous nerve and the intercostobrachial nerve block	Number of participants with complete anesthesia of the arm in region innervated by the MBCN and the ICBN

Secondary Outcome Measures

Name	Time	Method
Number of participants with complete anesthesia, with reduced sensitivity and with absence of anesthesia	At times 5, 10, 15, 20 minutes after the achievement of the medial brachial cutaneous nerve block and the intercostobrachial nerve block	Number of participants with complete anesthesia, with reduced sensitivity and with absence of anesthesia at times 5, 10, 15, 20 minutes (except primary outcome) in the areas of the medial brachial cutaneous nerve and the intercostobrachial nerve
Volume of local anesthetic	After nerve block immediately	The volume (in milliliters) of 1% lidocaine used for the medial brachial cutaneous nerve and the intercostobrachial nerve block
Tourniquet tolerance	3 hours after the achievement of the medial brachial cutaneous nerve block and the intercostobrachial nerve block	Number of patients with comfortable feeling, with unpleasant sensations and with pains during surgery, in the areas of the medial brachial cutaneous nerve and the intercostobrachial nerve
Good ultrasound view of theses nerves before and after the injection of the local anesthetic	5 minutes after the achievement of the medial brachial cutaneous nerve block and the intercostobrachial nerve block	Number of participants (of the ultrasound-guided group) with good ultrasound view of theses nerves before and after the injection of the local anesthetic
Bad ultrasound view of theses nerves before the injection and good ultrasound view of theses nerves after the injection of the local anesthetic	5 minutes after the achievement of the medial brachial cutaneous nerve block and the intercostobrachial nerve block	Number of participants (of the ultrasound-guided group) with bad ultrasound view of theses nerves before the injection and good ultrasound view of theses nerves after the injection of the local anesthetic
Bad ultrasound view of theses nerves before and after the injection of the local anesthetic	5 minutes after the achievement of the medial brachial cutaneous nerve block and the intercostobrachial nerve block	Number of participants (of the ultrasound-guided group) with bad ultrasound view of theses nerves before and after the injection of the local anesthetic

Trial Locations

Locations (1)

Cangzhou Hospital of Integrated Traditional Chinese and Western Medicine; 🇨🇳 Cangzhou, Hebei, China