Continuous vs Liposomal Bupivacaine Interscalene Block for Proximal Humeral Fracture (CLIP)

Single shot injection of 10ml 1.33% LB; Due to the milky colour of LB, syringe containing the LB will be covered; Followed by placement of indwelling catheter in ISB; Catheter will be connected to a fixed-rate portable elastometric pump ( Easy pump, ®) upon arrival in the recovery room by the nurse; The pump will be filled with 300ml NS; The default fixed rate of infusion will be 5ml/hr; Both the pump and the clamp will be covered by an aluminium foil; Catheter and pump will be removed on post-operative day 2

Single shot injection of 10 ml 0.25% SB in ISB; In order to have blinding to the drug injected, syringe containing SB will be covered; followed by placement of indwelling catheter in ISB; Catheter will be connected to a fixed-rate portable elastometric pump ( Easy pump, ®) upon arrival in the recovery room by the nurse; The pump will be filled with 300ml 0.2% SB; The default fixed-rate of infusion will be 5ml/hr; Both the pump and the clamp will be covered by an aluminium foil; Catheter and pump will be removed on post-operative day 2