Perfusion Index for Predicting Brachial Plexus Block Success Under General Anesthesia
- Conditions
- Disorder of Shoulder
- Registration Number
- NCT04925505
- Lead Sponsor
- Korea University Guro Hospital
- Brief 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).
- 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.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 70
- 20-70 years old,
- BMI 20-35 kg.m-2,
- elective shoulder surgery,
- ASA physical status I-III
- refusal of the patient,
- comorbid with serious vascular disease,
- diabetes,
- allergy to local anesthetics,
- patients on regular opioids,
- peripheral neuropathy.
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method Perfusion Index change between before and 15 minutes after brachial plexus block perfusion index measured applied to both blocked and non-blocked limbs using two separate oximeters
- Secondary Outcome Measures
Name Time Method Motor function test on supraclavicular nerve and axillary nerve and 1 hour after surgery 0-2 scale where 0 = no block; 1 = paresis; 2 = paralysis
Heart rate change between before and 5 minutes after incision of surgical procedure heart rate in bpm during operation
Sensory function test on supraclavicular nerve and axillary nerve 1 hour after surgery 0-2 scale where 0=no block; 1=analgesia (patient can feel touch, not cold); 2=anesthesia (patient cannot feel touch)
Blood pressure change between before and 5 minutes after incision of surgical procedure blood pressure in mmHg during operation
Pain score 1 hour after surgery Numeric rating scale for pain on a 0-10 scale where 0=no pain and 10=unbearable pain
Trial Locations
- Locations (1)
Department of Anaesthesiology and Pain Medicine, Korea University Guro Hospital
🇰🇷Seoul, Korea, Republic of
Department of Anaesthesiology and Pain Medicine, Korea University Guro Hospital🇰🇷Seoul, Korea, Republic of