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  • Title: A Prospective Randomized Study of Paravertebral Blockade in Patients Undergoing Robotic Mitral Valve Repair.
    Author: Neuburger PJ, Ngai JY, Chacon MM, Luria B, Manrique-Espinel AM, Kline RP, Grossi EA, Loulmet DF.
    Journal: J Cardiothorac Vasc Anesth; 2015 Aug; 29(4):930-6. PubMed ID: 25620765.
    Abstract:
    OBJECTIVE: The aim of this study was to evaluate the addition of paravertebral blockade to general anesthesia in patients undergoing robotic mitral valve repair. DESIGN: A randomized, prospective trial. SETTING: A single tertiary referral academic medical center. PARTICIPANTS: 60 patients undergoing robotic mitral valve surgery. INTERVENTIONS: Patients were randomized to receive 4-level paravertebral blockade with 0.5% bupivicaine before induction of general anesthesia. All patients were given a fentanyl patient-controlled analgesia upon arrival to the intensive care unit, and visual analog scale pain scores were queried for 24 hours. On postoperative day 2, patients were given an anesthesia satisfaction survey. MEASUREMENTS AND MAIN RESULTS: After obtaining institutional review board approval, surgical and anesthetic data were recorded perioperatively and compared between groups. Compared to general anesthesia alone, patients receiving paravertebral blockade and general anesthesia reported significantly less postoperative pain and required fewer narcotics intraoperatively and postoperatively. Patients receiving paravertebral blockade also reported significantly higher satisfaction with anesthesia. Successful extubation in the operating room at the conclusion of surgery was 90% and similar in both groups. Hospital length of stay also was similar. No adverse reactions were reported. CONCLUSIONS: The addition of paravertebral blockade to general anesthesia appears safe and can reduce postoperative pain and narcotic usage in patients undergoing minimally invasive cardiac surgery. These findings were similar to previous studies of patients undergoing thoracic procedures. Paravertebral blockade alone likely does not reduce hospital length of stay. This may be more closely related to early extubation, which is possible with or without paravertebral blockade.
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