Neuromuscular Blockade Clinical Trial
Official title:
The Reversal of Residual Neuromuscular Blockade After Neostigmine and Half-dose Sugammadex: A Comparison With Standard Reversal of Full-dose Neostigmine
Sugammadex may prevent residual neuromuscular blockade by providing rapid reversal at the end of the operation. Our goal is to compare the half-dose use of sugammadex for reversing residual blockade after administration of neostigmine and atropine to the routine use of reversal medication.
Background: Postoperative residual neuromuscular block (PONB) may be observed in patients in the recovery room after surgery, and this event causes significant adverse events such as respiratory muscle weakness, decreased tidal volumes causing hypoxemia, reintubation, prolonged mechanical ventilation, and possible risk for a cardiopulmonary arrest. Goal: The study investigators hypothesized to investigate the effects of the half-dose use of sugammadex for reversing residual blockade after administration of neostigmine and atropine and compare these results to the routine full-dose use neostigmine and atropine. The Study Design: The study investigators planned to perform a prospective, single-blinded, randomized trial. The study Protocol: The investigators enrolled patients undergoing lower abdominal tumor resection surgery under general anesthesia who fulfill our inclusion criteria. The study is single-blinded because the anesthesia resident, anesthesia technician, and anesthesia personnel, including the data collector, were blinded to the randomization. The supervising anesthesiologist was also a data collector, and she was not blinded to the study protocol. The randomization into two groups required the use of a computer system. The study investigators performed a random allocation sequence by the use of randomized block design codes that are generated from a computer. Afterward, the study investigators opened an opaque and sealed envelope that contained the generated codes and randomly divided patients into two groups. During this process, they made sure that all study personnel was blinded to the randomization. The study investigators divide patients into two groups after the randomization process, and the groups are as follows: The first group of 48 patients is called Group N. In this group of patients, and we administer intravenous neostigmine 0.05 mg/kg and atropine 0.02 mg/kg in a single syringe before extubation. The second group of 50 patients is called Group N+S. In Group N+S, the study investigators administered the standard reversal medications of intravenous neostigmine 0.05 mg/kg and atropine 0.02 mg/kg. Three minutes later, the study 'investigators administered an intravenous bolus dose of 1 mg/kg sugammadex in a different syringe prepared earlier as a reversal agent. The Study Measurement of Parameters. The patients require general anesthesia induction with an intermediate-acting neuromuscular blocking age, rocuronium, at a dose of 0.06 mg/kg intravenously. After induction of anesthesia and before administration of rocuronium, the investigators monitored train-of-four (TOF) counts using a monitoring device of neuromuscular blockade at the patient's ulnar nerve. For this purpose, they placed two surface electrodes above the ulnar nerve near the wrist. To monitor the nerve stimuli at the adductor pollicis muscle using acceleromyography (TOF Watch SX, Schering-Plough Ireland, Dublin, Ireland). After induction of general anesthesia, the TOF Watch device provided 50-Hz tetanic stimulation for 5 seconds, and one minute after this tetanic stimulation, it offered a train-of-four (TOF) stimulation. Depending on the TOF-watch-related parameters, they decided to administer rocuronium, the neuromuscular agent, or not. At the end of the surgery, all anesthetics needed to be discontinued, including inhalational agents who were sevoflurane and nitrous oxide. Once the end-tidal concentration of sevoflurane reached a 0.4-0.6% level, the investigators administered the previously randomized reversal study drug. For the administration of the reversal agents, there was a need for a TOF count of 2 observed in the TOF Watch device. A TOF count of 2 in TOF Watch monitoring provided information of a shallow neuromuscular block. The Collected Parameters. They observed the clinical signs of recovery using several parameters. These parameters are level of consciousness, head-lift test, ability to sustain head lift, general muscle weakness, laryngospasm, and desaturation. The study investigators collected the periods between the last dose of intravenous rocuronium and administering a reversal agent, administering a reversal agent to extubation, and administering a reversal agent to operating room discharge. These periods were in minutes. They also collected the recovery periods between the start of helping reversal agent to the recovery of TOF ratio < 0.9 to 0.7 and TOF ratio ≥ 0.9, which were in minutes. They collected hemodynamical data, including; noninvasive mean arterial pressure, heart rate measurements, and peripheral oxygen saturation values before and subsequently at 2, 5, 10, and 30 minutes after administering the reversal drugs and in the recovery room. The primary outcome was the incidence of a train-of-four (TOF) ratio less than 0.9 at tracheal extubation. The secondary outcomes were periods between the start of administering reversal agents and extubation or operating room discharge in minutes to achieve recovery of TOF ratio < 0.9 to 0.7 and TOF ratio ≥ 0.9. ;
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