The purpose of this study is to determine if a decrease in the standard volume of local anesthetic used to numb your shoulder area before shoulder arthroscopy will provide adequate anesthesia for the procedure and decrease the amount of time until you are ready for discharge from the hospital.
Traditionally, an interscalene block is done either with nerve stimulator or ultrasound guided using 40-60mL of local anesthetic. The study plans to investigate the difference in hand grip strength post-operatively in patients who will receive interscalene blocks with 40mL versus a lower dose (20mL) of local anesthetic. We suspect the lower dose will achieve adequate surgical anesthesia while creating less motor block and thus, increase patient satisfaction, present fewer complications or adverse affects and decrease time in the recovery room.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
154
Anesthetic volume: Investigational group: A 1:1 Mepivacaine 1.5%: Bupivacaine 0.5% mixture for a total of 20 mL
Anesthetic volume: Control group: A 1:1 Mepivacaine 1.5%: Bupivacaine 0.5% mixture for a total of 40 mL
Hospital for Special Surgery
New York, New York, United States
Handgrip Strength
The primary outcome will be handgrip strength as measured by a dynamometer. A reading will be obtained at baseline (before the interscalene block) and 60 minutes post-operative.
Time frame: Difference between between baseline and postoperative.
Patient Readiness to Discharge
Time frame: Participants will be followed every 15 minutes post-surgery until discharged from the hospital (up to 180 minutes)
Duration of Analgesia
Time to pain
Time frame: Postoperative Day 2
Side Effects
Incidence of nausea
Time frame: Postoperative Day 2
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.