Acute Postoperative Pain Clinical Trial
Official title:
The Efficacy of Bupivacaine 0.125% Versus Bupivacaine 0.25% in Superficial Cervical Plexus Block on Operative Field Visibility for Adults Undergoing Tympanomastoid Surgeries, A Prospective Randomized Controlled Study
Bleeding is one of the most common complications in tympanomastoid surgery that could prolong the time of operation and also might lead to morbidity. Pain is also one of the most annoying complications of tympanomastoid surgeries. Thus, adequate surgical field visualization is utmost important. A bloodless field allows optimal exposure and identification of vital neurovascular structures. Even small bleeding, inconsequential for the patient's volume status, can create great technical difficulty in the confined space of the tympan, leading to prolonged surgery, incomplete procedures, and increased complications. The use of regional nerve blocks as an alternative to hypotensive anesthesia has gained popularity in recent years. The superficial cervical plexus block (SCPB) provides effective analgesia and reduces sympathetic activity, resulting in reduced bleeding and improved surgical conditions. The superficial cervical plexus (SCP) provides sensory innervation to the ear and surrounding structures, reducing pain perception during and after surgery. This is the first randomized controlled clinical trial investigating the effect of combined general anesthesia with SCPB using 0.125% versus 0.25% bupivacaine during tympanomastoid surgery. This study aims to compare the efficacy of two different concentrations of bupivacaine 0.125% & 0.25% in Superficial Cervical Plexus Block in patients undergoing tympanomastoid surgery on operative field visualization, intraoperative hemodynamic stability, and postoperative analgesia. The investigators hypothesize that bupivacaine 0.125% would be non-inferior to bupivacaine 0.25% in achieving optimal surgical field visualization, hemodynamic stability, surgeon satisfaction and postoperative analgesia. This prospective double-blinded study will be carried out on 60 patients between 21 to 70 years, with ASA I-II and undergoing tympanomastoid surgery. Participants were equally divided into two groups: Group A: Patients received SCPB using 0.25% bupivacaine (5ml of bupivacaine 0.5% + 5ml normal saline). Group B: Patients received SCPB using 0.125% bupivacaine (2.5ml of bupivacaine 0.5% + 7.5ml normal saline).
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