Distance for Interscalene Block

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

25 participants

Study Classification

OBSERVATIONAL

Study Start Date

2012-02-29

Study Completion Date

2014-03-26

Brief Summary

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Patients experience significant postoperative pain following shoulder surgery, Single shot interscalene block is used in ambulatory shoulder surgery for its advantages that include significant reduction in acute pain and analgesic requirements, prolonged time to first analgesic request, decreased incidence of nausea, as well as earlier hospital discharge.The process of 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. These facts raised concerns and several authors stated that maybe the anesthesiologists should be more careful, keep a safe distance from the nerve, and inject the local anesthetics into fascial planes containing the nerve and not attempt to place the needle in close proximity to the nerve. This study is designed to determine the maximal effective distance away from the nerve for the injection to be effective.

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Detailed Description

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Conditions

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Regional Anesthesia Inter Scalene Block Post Operative Analgesia

Study Design

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Observational Model Type

OTHER

Study Time Perspective

PROSPECTIVE

Eligibility Criteria

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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
* severe respiratory disease
* inability to understand the informed consent and demands of the study

Minimum Eligible Age

18 Years

Maximum Eligible Age

85 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No