Success or failure of the brachial plexus block for any given volume will be determined by the verbal analogue pain scale score obtained 60 minutes after surgical end time. Volumes will be determined by continuous reassessment method.
Age
18–any
Sex
ALL
Healthy volunteers
Accepted
You may be eligible if
Surgical candidate for Arthroscopic rotator cuff surgery
ASA I-III
BMI\<40
Age \>18
You may not be if
Inability to give informed consent
Inability to complete consent process in English
allergy to ropivacaine
neuropathy
contraindications to peripheral nerve block per ASRA guidelines
chronic opioid use
infection at the injection/catheter site
limb restriction due to medical history
history of moderate - severe lung disease.
Clareo Health | Optimal Effective Local Anesthetic Volume for Pain Relief Using Brachial Plexus Block
