USG Block of Cutaneous Nerves of the Arm

Cangzhou Hospital of Integrated Traditional Chinese and Western Medicine200 enrolled

Overview

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.

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 Type

OBSERVATIONAL

Enrollment

200

Conditions

Nerve Block

Interventions

Ultrasound-Guided Plane BlockPROCEDURE

Ultrasound-Guided Plane Block Medial Brachial Cutaneous and the Intercostobrachial Nerves

Conventional BlockPROCEDURE

Conventional Block Medial Brachial Cutaneous and the Intercostobrachial Nerves

Eligibility

Sex: ALLMin age: 18 YearsMax age: 65 YearsHealthy volunteers:

Medical Language ↔ Plain English

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

Locations (1)

Cangzhou Hospital of Integrated Traditional Chinese and Western Medicine

Cangzhou, Hebei, China

Outcomes

Primary Outcomes

Number of participants with complete anesthesia

Number of participants with complete anesthesia of the arm in region innervated by the MBCN and the ICBN

Time frame: At time 20 minutes after the medial brachial cutaneous nerve and the intercostobrachial nerve block

Secondary Outcomes

Number of participants with complete anesthesia, with reduced sensitivity and with absence of anesthesia

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

Time frame: At times 5, 10, 15, 20 minutes after the achievement of the medial brachial cutaneous nerve block and the intercostobrachial nerve block

Volume of local anesthetic

The volume (in milliliters) of 1% lidocaine used for the medial brachial cutaneous nerve and the intercostobrachial nerve block

Time frame: After nerve block immediately

Tourniquet tolerance

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

Time frame: 3 hours after the achievement of the medial brachial cutaneous nerve block and the intercostobrachial nerve block

Good ultrasound view of theses nerves before and after the injection of the local anesthetic

Number of participants (of the ultrasound-guided group) with good ultrasound view of theses nerves before and after the injection of the local anesthetic

Time frame: 5 minutes after the achievement of the medial brachial cutaneous nerve block and the intercostobrachial nerve block

Data from ClinicalTrials.gov

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