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Effects of interscalene brachial plexus block to intra-operative hemodynamics and postoperative pain for arthroscopic shoulder surgery Full Text
Korean Journal of Anesthesiology, 02/03/2012
Lee HY et al. – Interscalene brachial plexus block (IBPB) effectively controlled the hemodynamic changes that occurred during arthroscopic shoulder surgery as well as post–operative pain.
Methods- After institutional review board approval, 50 consecutive patients that had undergone arthroscopic shoulder surgery under general anesthesia were randomly assigned to one of two groups to evaluate intra–operative hemodynamic changes and post–operative pain control.
- Group 1 patients received an IBPB with 10 ml of normal saline guided by a nerve stimulator before induction, and Group 2 patients received 10 ml of 0.5% ropivacaine hydrochloride with the same technique.
- The heart rate and systolic and diastolic blood pressures were recorded before the incision and 1, 3, 5, 10, and 20 minutes after the incision.
- Pre–operative and post–operative pain was evaluated with a visual analog scale 1, 3, 6, 12, and 24 hours after surgery.
- The patients were given tramadol as a rescue medication option.
- The total volume of tramadol that was injected was also evaluated over the same intervals.
- Group 2 showed significantly lower systolic and diastolic blood pressures and heart rates intra–operatively compared to Group 1 (P < 0.05).
- The visual analog scale pain scores, except at 24 hours after surgery, were significantly lower in Group 2 (P < 0.05).
- The total tramadol consumption significantly reduced in Group 2 (P < 0.05).