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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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Ultrasound-Guided | Ultrasound-Guided Plane Block |
| |
| Conventional | Conventional Block |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Ultrasound-Guided Plane Block | Procedure | Ultrasound-Guided Plane Block Medial Brachial Cutaneous and the Intercostobrachial Nerves |
|
| Measure | Description | Time Frame |
|---|---|---|
| Number of participants with complete anesthesia | Number of participants with complete anesthesia of the arm in region innervated by the MBCN and the ICBN | At time 20 minutes after the medial brachial cutaneous nerve and the intercostobrachial nerve block |
| Measure | Description | Time Frame |
|---|---|---|
| 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 | At times 5, 10, 15, 20 minutes after the achievement of the medial brachial cutaneous nerve block and the intercostobrachial nerve block |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Ruizha Lv, M.D | Cangzhou Hospital of Integrated Traditional Chinese and Western Medicine | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Cangzhou Hospital of Integrated Traditional Chinese and Western Medicine | Cangzhou | Hebei | 061001 | China |
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| Conventional Block | Procedure | Conventional Block Medial Brachial Cutaneous and the Intercostobrachial Nerves |
|
| Volume of local anesthetic | The volume (in milliliters) of 1% lidocaine used for the medial brachial cutaneous nerve and the intercostobrachial nerve block | 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 | 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 | 5 minutes after the achievement of the medial brachial cutaneous nerve block and the intercostobrachial nerve block |
| Bad ultrasound view of theses nerves before the injection and good ultrasound view of theses nerves after the injection of the local anesthetic | 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 | 5 minutes after the achievement of the medial brachial cutaneous nerve block and the intercostobrachial nerve block |
| Bad ultrasound view of theses nerves before and after the injection of the local anesthetic | Number of participants (of the ultrasound-guided group) with 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 |