Maximal Distance for Successful Supraclavicular Block

The Maximum Effective Needle-to-Nerve Distance for Anesthetic Ultrasound-Guided Supraclavicular Brachial Plexus Block

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 Overview

• Status: Unknown
• Conditions: Ultrasound; Supraclavicular Block; Regional Anesthesia

• Study Type: Observational
• Enrollment (Anticipated): 44

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 85 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

Patients undergoing upper limb surgery surgery (hand, forearm, elbow)

Description

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

Study Plan

How is the study designed?

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
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	30 minutes

Secondary Outcome Measures

Outcome Measure	Time Frame
•The onset time of sensory and motor block	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.	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.	up to 48 hours post operative.

Collaborators and Investigators

• Sponsor: Tunisian Military Hospital

Study record dates

Study Major Dates

• Study Start: May 1, 2015
• Primary Completion (Anticipated): July 1, 2015
• Study Completion (Anticipated): August 1, 2015

Study Registration Dates

• First Submitted: February 27, 2015
• First Submitted That Met QC Criteria: March 3, 2015
• First Posted (Estimate): March 9, 2015

Study Record Updates

• Last Update Posted (Estimate): May 13, 2015
• Last Update Submitted That Met QC Criteria: May 12, 2015
• Last Verified: March 1, 2015

More Information

Terms related to this study

• Other Study ID Numbers: TunisianMH