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Background: Bezold Jarisch reflex is important cause of hypotension and bradycardia which occur after spinal anaesthesia. This reflex is elicited by stimulation of peripheral serotonin receptors 5- hydroxytryptamine (5- HT3 type). These receptors have antinociceptive effect, which is confirmed by many studies.The two most commonly used 5HT3 antagonist are ondansetron and granisetrone. Very few comparative studies of the two drugs on the effect after spinal anaesthesia are available.Methods: Ninety adulted patients of either sex aged 18-58 years scheduled for elective infraumbilical surgeries were randomly allocated in three groups to receive intravenous ondansetron 4mg, granisetrone 2mg or normal saline in equal volume 5mins before spinal anesthesia. Hemodynamic changes and time to sensory motor onset and regression were evaluated.Results: There was statistically significant difference in fall of systolic diastolic and mean blood pressure among the three groups. Time to two segment regression of sensory block and time to regression to S1 was faster in ondansentron (76.6±17.2mins, 176±22mins) and granisetrone group (69±17.3mins, 165±19.2mins) in comparision to control group(77.4±24.3mins, 178±21mins) which was statistically significant also p value-0.019, 0.0001 respectively.Conclusions: The prophylactic therapy with 4mg i.v. ondansetron, given five minutes before spinal anaesthesia appears to be significantly most effective and safe for attenuating haemodynamic response after spinal anaesthesia without affecting the duration of sensory block in patients undergoing infraumbilical surgeries.
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Background: Although, the concept of laparoscopic surgeries has revolutionised the surgical practice and has markedly reduced the incidence of complications especially postoperative pain. However, the menace of postoperative pain still remains challenge, especially in first 24 hours. The present study was conducted to comparatively analyse the postoperative pain and sedation using intravenous dexmedetomidine and intravenous esmolol during laparoscopic cholecystectomy.Methods: Study was conducted on 90 adult patients aged 18-60 years of ASA grade I or II of both genders, scheduled for laparoscopic cholecystectomy under general anaesthesia. Patients were randomized into three groups of 30 patients each. Patients of group A received esmolol infusion (loading: 1 mg/kg and maintenance: 5-15 µg/kg/min), patients of group B received dexmedetomidine infusion (loading: 0.7 µg/kg and maintenance: 0.4 µg/kg/hour) and group C (control group) received normal saline infusion. During the post-operative period of 24 hours, patient were monitored for sedation using Ramsay sedation score like pain, using visual analogue score (VAS), incidence of post-operative nausea and vomiting and use of any drug for pain, vomiting and any other side effect.Results: Frequency of pain was highest in group C at all post periods, followed by group A and was least in group B. The mean sedation score of group B was comparatively higher as compared to both group C and group A.Conclusions: The inference authors drew was that dexmedetomidine is better analgesic with aurousable sedation.
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Background: In laparoscopic surgeries, insufflation with carbon dioxide triggers vagal afferents on the bowel and peritoneum which induces emesis by activating the vomiting center. It is hypothesized that combined antiemetics with different sites of activity would be more effective than one drug alone for the prophylaxis against PONV. So, the present study was planned to compare the efficacy of granisetron, dexamethasone and combination of granisetron with dexamethasone to prevent PONV.Methods: This randomized prospective double-blind study was performed on 120 patients, aged between 18 and 58 years of ASA physical status I and II of either sex undergoing laparoscopic surgeries under general anesthesia. Patients were randomized in three groups, group I (granisetrone 2 mg I.V.), group II (dexamethasone) 8 mg I.V., group III (granisetrone+dexamethasone) 2 mg+8 mg I.V. with 40 patients in each group. Complete response, incidence of nausea, vomiting, and rescue antiemetic were recorded at specified intervals.Results: A complete response (defined as no PONV and no need for another rescue antiemetic) was achieved in 75% of the patients given granisetron, 70% in dexamethasone and in 92.5% of the patients given granisetron plus dexamethasone (P <0.05). The overall cumulative incidences (0-24 hours) of PONV were 10 (25%) in the granisetron, 12 (30%) in the dexamethasone and 3 (7.5%) in the combination group. No difference in adverse events were observed in any of the groups.Conclusions: The prophylactic therapy of granisetron 2 mg plus dexamethasone 8 mg just before induction of anaesthesia is significantly effective in prevention of PONV in patients undergoing laparoscopic surgeries.
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Background: The improved understanding of origin of abdominal and shoulder pain after laparoscopic procedures led to the use of intra peritoneal and port site instillation of local anaesthetic to reduce post-operative pain. Combinations of intraperitoneal local anaesthetics with many opioids have been studied in past and it was proved that they provide additional analgesic benefits. Material and methods: 106 ASA grade I and II patients of age 20 to 60 years of either sex weighing 40 to 70 kg undergoing laparascopic cholecystectomy under general anaesthesia were enrolled for the present study after written informed consent and institutional ethical committee cleareance. Patients were randomized into two groups , Group I (n=53): Patients received 30ml of 0.5% ropivacaine with 2ml Normal Saline. Group II (n=53): Patients received 30ml of 0.5% ropivacaine with fentanyl 100 mcg (2 ml). General anaesthesia was standardized. VAS, VRS scores, hemodynamics, total amount of rescue analgesic and side effects were noted at regular intervals. Results: VAS and VRS score were significantly lower in ropivacaine plus fentanyl group in comparisons to ropivacaine alone group at most of the time intervals. Hemodynamics was comparable between the two groups. Total Rescue analgesic were also significantly ow in ropivacaine plus fentanyl group side effects were comparable between two group. Conclusion: Intraperitoneal instillation of ropivacaine with fentanyl reduces not only the intensity of visceral, parietal and shoulder pain but also the total rescue analgesic dose consumption.