Continuous Preperitoneal Infusion of Local Anesthetic (CPA) Versus Epidural Infusion of Local Anesthetic (EA) in Fast-Track Open Colorectal Surgery

Early Rehabilitation After Surgery, Open Colorectal Surgery

Epidural analgesia, Continuous preperitoneal analgesia, Surgery, Open colorectal surgery, Fast-track surgery, ERAS

The purpose of this study is to compare the continuous preperitoneal infusion of local anesthetic and continuous epidural analgesia for postoperative pain management in fast-track open colorectal surgery.

Optimized pain relief allowing early mobilization is a prerequisite for enhanced recovery after surgery. Open colorectal surgery is associated with severe and prolonged postoperative pain, especially during mobilization. No analgesic technique has fulfilled all requirements of optimal efficacy: no side effects, low costs, high patient compliance, and improvement in outcome, and consequently, multimodal analgesic techniques have been introduced with a focus on opioid sparing to improve analgesia and recovery. Epidural analgesia (EA) has shown a marked benefit in controlling pain at mobilization, and significantly improves pain management when compared with systemic patient-controlled morphine analgesia. However, eligible patients may not benefit from it because of technical problems or failure of efficiency. Recently, continuous preperitoneal infusion of local anesthetic (CPA) has been shown to be an effective method to relief pain after open colorectal surgery, to reduced morphine consumption and accelerated postoperative recovery. However, this technique has never been evaluated in a fast-track program (ERAS protocol). Moreover, continuous preperitoneal infusions of local anesthetic and epidural analgesia have never been compared. The purpose of this randomized and double-blinded study is to compare these two techniques on pain control during mobilization, as a prerequisite for enhanced recovery after open colorectal surgery: 1- CPA group: continuous preperitoneal administration of 0.2% ropivacaine using a multilobed catheter positioned between the previously closed parietal peritoneum and the underside of the transversalis fascia + intravenous morphine (patient-controlled analgesia, PCA) as a rescue; 2- EA group: epidural infusion of 0.2% ropivacaine (patient-controlled epidural analgesia, PCEA) + continuous preperitoneal administration of 0.9% saline.

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