Is Perfusion Index an Indicator of Block Success in Ultrasound-guided Infraclavicular Brachial Plexus Block

Carpal Tunnel Syndrome Clinical Trial

Official title:

Comparison of Block Success in Patients Undergoing Ultrasound-guided Infraclavicular Brachial Plexus Block With Bilateral Upper Extremity Perfusion Index

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT04921891
• Other study ID #: 2014-86
• Status: Completed
• Phase: N/A
• Start date: April 15, 2014
• Est. completion date: October 30, 2014

Study information

• Verified date: June 2021
• Source: Bakirkoy Dr. Sadi Konuk Research and Training Hospital
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The infraclavicular nerve block, which is frequently preferred in upper extremity surgeries, provides additional advantages such as reduction in opioid consumption by providing analgesic effect in the postoperative period as welll. The success of peripheral nerve blocks is usually assessed by subjective feedback from the patient, and patient cooperation is needed. The aim of this study is to assess whether the perfusion index level, which can be measured noninvasively, can be a predictor of the infraclavicular block success.

Description:

Thirty patients who were operated on for carpal tunnel syndrome under infraclavicular brachial plexus block were included in our study. After the procedure, at 10-minute intervals, the sensory block was assessed by a pinprick test, and the motor block was assessed by the ability to flex the hand and the forearm. In addition, PI and skin temperature were measured 0-10-20-30 minutes after the block and at postoperative 2, 4, and 6 hours. 30 minutes after the measurements, the surgical procedure was allowed to begin in patients with successful block.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 30
• Est. completion date: October 30, 2014
• Est. primary completion date: April 15, 2014
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 75 Years

Eligibility

Inclusion Criteria:

• Ages of 18-75

• Patients who will diagnose with carpal tunnel syndrome by electroneuromyography (ENMG), and will undergo unilateral surgery under elective conditions

• ASA I-II-III patients

Exclusion Criteria:

• Patients who will refuse this method

• Neurological deficits,

• Diabetes mellitus,

• Local anesthetic allergy,

• Morbidly obese,

• Peripheral vascular disease, coronary artery disease, or coagulopathy

Related Conditions & MeSH terms

• Carpal Tunnel Syndrome
• Perfusion Index

Intervention

Procedure:
• Infraclavicular nerve block
The investigators performed an infraclavicular nerve block to the operated arm group to provide anesthesia.
• Without nerve block
The upper extremity without block was assigned as the control group, and a comparison was made between the two upper extremities.

Locations

Country	Name	City	State
Turkey	Bakirkoy Dr. Sadi Konuk Research and Training Hospital	Istanbul	Bakirkoy

Sponsors (1)

Lead Sponsor	Collaborator
Bakirkoy Dr. Sadi Konuk Research and Training Hospital

Country where clinical trial is conducted

Turkey, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Evaluation of whether perfusion index is a reliable and objective method to indicate block success	Perfusion index was measured up to 6 hours after the procedure.	6 hours postprocedurly
Secondary	Determining of a cut-off value for PI and PI ratio for a successful block.	There may be changes in the cut-off value depending on the applied plexus area, local anesthesia, volume and concentration of LA and the applied assistive technique (ultrasound or nerve stimulator). For both this reason and due to the high variability in the PI values, the PI ratio was calculated to predict block success.	Up to 6 hours after the procedure