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Clinical Trial Summary

This study aim to calculate the minimal effective ropivacaine concentration required achieve successful analgesic interscalene block in 90% of patients (MEAC90)


Clinical Trial Description

- Before induction of general anesthesia, all patients will receive interscalene block using 15ml of ropivacaine which concentration will be based on the response of the previous patient. - Based on biased-coin design up-down sequential method: if patient has pain free recovery, a successful block, the next patient will be randomized to receive either the same ropivacaine concentration or a concentration 0.01% w/v less. However, if he has an unsuccessful block, the next patient will receive a concentration 0.01% w/v higher. - Patients with pain free recovery will be considered to have positive response. - Patients' responses will be analyzed to calculate the MEAC90. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT04833296
Study type Interventional
Source Healthpoint Hospital
Contact
Status Not yet recruiting
Phase Phase 4
Start date May 1, 2021
Completion date September 30, 2021

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