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Introduction Laparoscopic Live Donor Nephrectomy(LLDN) is becoming an increasingly frequent procedure. The rise in intracranial pressure(ICP) during LLDN has not been measured yet. ICP can be evaluated by measuring ultrasonographic optic nerve sheath diameter(ONSD). Acetazolamide has been found to provide effective analgesia following LLDN. It also helps lowering the raised ICP. Therefore, we planned to study effect of orogastric Acetazolamide on ONSD in patients undergoing LLDN. Methods Forty Donors scheduled for LLDN were randomized preoperatively either into Group A receiving acetazolamide 5mg/kg or Group S receiving normal saline. ONSD was measured at time points:Time 0: In supine position before induction of GA, Time 1: 5 minutes after induction of GA but before giving orogastric acetazolamide, Time 2: 10 minutes after creating pneumoperitoneum, Time 3: 60 minutes after creating pneumoperitoneum, Time 4: Towards end of surgery, just before taking out specimen in modified flank position, Time 5: after extubating in supine position. Results Mean ONSD of left eye(4.42 ± 0.48) in Group S was significantly more than mean ONSD of left eye(4.16 ± 0.15; p-0.036) in Group A at 10 mins after creating pneumoperitoneum in modified flank position. Mean ONSD showed significant increase in group S at 10 and 60 minutes(4.374 ± 0.433mm in group S vs 4.151 ± 0.168 in group A; p-0.042 at 10 mins and 4.336 ± 0.301mm in group S vs 4.149 ± 0.282mm in group A; p-0.050 at 60 mins) after creating pneumoperitoneum as compared to group A. Conclusion Orogastric acetazolamide 5 mg/kg was found to be beneficial in preventing rise in ONSD from 10 minutes to 1 hour of creating pneumoperitoneum in patients undergoing laparoscopic donor nephrectomy under general anaesthesia. Acetazolamide was also found to be effective in reducing postoperative pain.
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CONTEXT: Postoperative sore throat (POST) is a frequent and undesirable complication after general anesthesia with endotracheal intubation. Various pharmacological and non-pharmacological methods with variable success rate are used for attenuating POST. However, no single drug has been universally accepted. AIMS: To compare the effect of betamethasone gel, ketamine gargles and intravenous dexamethasone on the incidence and severity of POST. SETTINGS AND DESIGN: Prospective randomized controlled single-blinded trial conducted at a tertiary care centre. MATERIALS AND METHODS: A total of 100 patients of age 18 to 70 yr, ASA class I and II, scheduled for elective surgeries under general anaesthesia were included and divided randomly in betamethasone, dexamethasone, ketamine and control groups. Endotracheal tubes were lubricated with 0.05% betamethasone gel in betamethasone group, 0.2 mg/kg of dexamethasone was administered intravenously before induction of anaesthesia in dexamethasone group, 40 mg of ketamine gargles mixed with 30 ml of saline was given 5 minutes prior to induction in ketamine group. In the control group, none of the above agents were used. During the 24 hr after the operation, we noted the occurrence and severity of POST, cough and hoarseness. STATISTICAL ANALYSIS USED: The demographic data, surgical time and intubation among the groups were analyzed using one-way analysis of variance. Incidence and severity of POST, cough and hoarseness of voice among the groups were analyzed utilizing Chi-square test. RESULTS: Incidence of POST at one hour was found to be significantly less in betamethasone group (16%) and dexamethasone group (20%) in comparison to the control group (48%). The incidence of POST at 4 hours and 24 hours were found to be comparable. The frequency of hoarseness and cough at 1 hour, 4 hour and 24 hours were similar in all the groups. CONCLUSIONS: Prophylactic betamethasone gel application and intravenous dexamethasone administration before induction of anaesthesia resulted in clinically important and statistically significant decreases in the incidence of POST only in early postoperative period.
