Anesthesia: Essays and Researches 2018 12(2):328-332
Context: In day-to-day practice, subarachnoid block remains the most common type of anesthesia. Bupivacaine is commonly used local anesthetic of neuraxial blockade, though earlier 5% xylocaine and now ropivacaine and levobupivacaine are also used. Additives such as opioids and α2agonists are also used. We are using neostigmine as an additive with bupivacaine to see the duration of postoperative analgesia. Aims: To compare the efficacy of intrathecal hyperbaric bupivacaine with neostigmine when compared to hyperbaric bupivacaine with normal saline with regard to time of onset and duration of sensory and motor blockade, time to two-segment regression. Settings and Design: Randomized, double-blinded study. Subjects and Methods: One hundred patients admitted for lower abdominal and lower limb surgeries done under spinal anesthesia (SA) during the period of February 2015–August 2016. Statistical Analysis Used: Data were entered into Microsoft excel data sheet and analyzed using SPSS 22 version. Categorical data were represented in the form of frequencies and proportions. Chi-square was used as a test of significance. Continuous data were represented as a mean and standard deviation. Independent t-test was used as a test of significance to identify the mean difference between two groups. Results: Mean onset of sensory blockade with neostigmine group was 174.1 ± 107.1 s and in normal saline group 171 ± 35.6 s. Mean onset of motor blockade with neostigmine group was 197.4 ± 111.6 s and in normal saline group was 219.4 ± 73.2 s. Mean two-segment regression with neostigmine group was 110.6 ± 22.7 s and in normal saline group was 71.5 ± 17.1 min. Duration of analgesia with neostigmine group was 336.3 ± 54.5 min and in normal saline group was 188.8 ± 18.4 min. Conclusions: Intrathecal neostigmine is associated with significantly prolonged sensory, motor blockade, and effective postoperative analgesia.
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