- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04925505
Perfusion Index for Predicting Brachial Plexus Block Success Under General Anesthesia
Usefulness of Pulse Oximeter Perfusion Index for Predicting the Success of Interscalene Brachial Plexus Blockade Under General Anesthesia
Study Overview
Status
Conditions
Intervention / Treatment
Detailed 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.
Study Type
Enrollment (Estimated)
Contacts and Locations
Study Locations
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Seoul, Korea, Republic of, 08308
- Department of Anaesthesiology and Pain Medicine, Korea University Guro Hospital
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Sampling Method
Study Population
Description
Inclusion Criteria:
- 20-70 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.
Study Plan
How is the study designed?
Design Details
- Observational Models: Case-Control
- Time Perspectives: Prospective
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
BPB success
The study included patients aged between 20 and 70 yr who are to undergo elective shoulder surgery under general anesthesia.
Patients undergo general anesthesia induction before the interscalene block is performed.
Ultrasound-guided interscalene brachial plexus block will be performed in anesthetized patients before surgery.
PI monitor will be applied to both blocked and non-blocked limbs using two separate oximeters.
And the SUCCESS (or failure) of the block will be confirmed by (1) 30% change of heart rate and blood pressure after incision during operation, and (2) pain score, motor and sensory function test after surgery in the post-anesthesia recovery unit.
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Ultrasound-guidance, interscalene brachial plexus blocks, in-plane technique, perineural injection, 0.5% ropivacaine 12.5ml and 0.2% lidocaine 12.5ml
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BPB failure
The study included patients aged between 20 and 70 yr who are to undergo elective shoulder surgery under general anesthesia.
Patients undergo general anesthesia induction before the interscalene block is performed.
Ultrasound-guided interscalene brachial plexus block will be performed in anesthetized patients before surgery.
PI monitor will be applied to both blocked and non-blocked limbs using two separate oximeters.
And the (success or) FAILURE of the block will be confirmed by (1) 30% change of heart rate and blood pressure after incision during operation, and (2) pain score, motor and sensory function test after surgery in the post-anesthesia recovery unit.
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Ultrasound-guidance, interscalene brachial plexus blocks, in-plane technique, perineural injection, 0.5% ropivacaine 12.5ml and 0.2% lidocaine 12.5ml
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Perfusion Index
Time Frame: change between before and 15 minutes after brachial plexus block
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perfusion index measured applied to both blocked and non-blocked limbs using two separate oximeters
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change between before and 15 minutes after brachial plexus block
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Heart rate
Time Frame: change between before and 5 minutes after incision of surgical procedure
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heart rate in bpm during operation
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change between before and 5 minutes after incision of surgical procedure
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Blood pressure
Time Frame: change between before and 5 minutes after incision of surgical procedure
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blood pressure in mmHg during operation
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change between before and 5 minutes after incision of surgical procedure
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Pain score
Time Frame: 1 hour after surgery
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Numeric rating scale for pain on a 0-10 scale where 0=no pain and 10=unbearable pain
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1 hour after surgery
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Sensory function test on supraclavicular nerve and axillary nerve
Time Frame: 1 hour after surgery
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0-2 scale where 0=no block; 1=analgesia (patient can feel touch, not cold); 2=anesthesia (patient cannot feel touch)
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1 hour after surgery
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Motor function test on supraclavicular nerve and axillary nerve and
Time Frame: 1 hour after surgery
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0-2 scale where 0 = no block; 1 = paresis; 2 = paralysis
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1 hour after surgery
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Collaborators and Investigators
Sponsor
Publications and helpful links
General Publications
- Abdelnasser A, Abdelhamid B, Elsonbaty A, Hasanin A, Rady A. Predicting successful supraclavicular brachial plexus block using pulse oximeter perfusion index. Br J Anaesth. 2017 Aug 1;119(2):276-280. doi: 10.1093/bja/aex166.
- Misamore G, Webb B, McMurray S, Sallay P. A prospective analysis of interscalene brachial plexus blocks performed under general anesthesia. J Shoulder Elbow Surg. 2011 Mar;20(2):308-14. doi: 10.1016/j.jse.2010.04.043. Epub 2010 Aug 13.
- Marhofer P. Regional blocks carried out during general anesthesia or deep sedation: myths and facts. Curr Opin Anaesthesiol. 2017 Oct;30(5):621-626. doi: 10.1097/ACO.0000000000000504.
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 2021GR0104
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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