Maximal Distance for Successful Supraclavicular Block

Tunisian Military Hospital44 enrolled

Overview

The achievement of peripheral nerve block requires several needle passes, with each of them being at risk of causing nerve injury either by direct trauma or intraneural injection even with the use of the ultrasound. The ultrasound guided supraclavicular brachial plexus block is known to be at risk of pneumothorax and / or nerve injury. This study is designed to determine the maximal effective distance away from the nerve for the injection to be effective.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Regional Anesthesia Ultrasound Supraclavicular Block

Eligibility

Sex: ALLMin age: 18 YearsMax age: 85 Years

Medical Language ↔ Plain English

Inclusion Criteria: * ASA physical status I-III * 18-85 years of age, inclusive * surgery less than 3 hours Exclusion Criteria: * contraindications to brachial plexus block (e.g., allergy to local anesthetics, coagulopathy, malignancy or infection in the area) * existing neurological deficit in the area to be blocked * pregnancy * history of neck surgery or radiotherapy * inability to understand the informed consent and demands of the study

Outcomes

Primary Outcomes

Success of the ultrasound guided supraclavicular block at 30 minutes after injection at a specific distance of the needle tip from the outer sheeth of the nerve

Time frame: 30 minutes

Secondary Outcomes

•The onset time of sensory and motor block

Time frame: the block success will be assessed for each patient every 5 min for 30 mins in the operating room beginning when the needle exits the skin

The proportion of inadequate and failed blocks.

Time frame: the block success will be assessed for each patient every 5 min for 30 mins in the operating room beginning when the needle exits the skin

The presence of other complications such as hematoma, infection, pneumothorax.

Time frame: up to 48 hours post operative.

Data from ClinicalTrials.gov

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