Perfusion Index for Predicting Brachial Plexus Block Success Under General Anesthesia

  • STATUS
    Recruiting
  • End date
    Feb 28, 2024
  • participants needed
    70
  • sponsor
    Korea University Guro Hospital
Updated on 25 June 2021

Summary

This study was designed to determine whether the success or failure of interscalene brachial plexus block under general anesthesia can be predicted using perfusion index (PI).

Description

The success of peripheral nerve blocks is usually evaluated by assessment of sensory and motor function; however, this method cannot be applied in the patient who has uncheckable mental status, e.g. general anesthesia, or who is uncommunicable, e.g. different language user.

The perfusion index (PI) is a numerical value for the ratio between pulsatile and non-pulsatile blood flow measured by a special pulse oximeter, and PI had been proved as a useful tool for evaluation of successful supraclavicular nerve block in awake patients as an objective method.

With the use of ultrasound guidance in skilled hands, it is a reasonable option to perform neuraxial and peripheral regional blocks in sedated or anesthetized patients. However, there has been no evidence of applying PI for predicting the success of nerve block in general anesthetized patients.

Details
Condition disorder of shoulder, Shoulder Disease
Treatment Interscalene brachial plexus blocks with ultrasound guidance under general anesthesia
Clinical Study IdentifierNCT04925505
SponsorKorea University Guro Hospital
Last Modified on25 June 2021

Eligibility

Yes No Not Sure

Inclusion Criteria

-70 years old
BMI 20-35 kg.m-2
elective shoulder surgery
ASA physical status I-III

Exclusion Criteria

refusal of the patient
comorbid with serious vascular disease
diabetes
allergy to local anesthetics
patients on regular opioids
peripheral neuropathy
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