a b s t r a c t Ó 2017 Publishing services by Elsevier B.V. on behalf of Egyptian Society of Anesthesiologists. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Background: Shivering is one of the most stressful complications for both the surgeon and the anesthesiologist during neuraxial anesthesia. The aim of this prospective randomized double blinded study was to evaluate the effectiveness of preoperative administration of granisetron, dexmedetomidine, and tramadol in prevention of shivering in patients undergoing elective operations with subarachnoid anesthesia. Methods: 320 patients ASA I or II aged between 18 and 65 years scheduled for elective operations under subarachnoid block were included in the study. They were divided randomly into four equal groups, and 10 min before performance of subarachnoid block, patients in group G (n = 80) received 40 lg/kg intravenous infusion of granisetron in 100 ml of normal saline, patients in group D (n = 80) received 0.5 lg/kg intravenous infusion of dexmedetomidine in 100 ml of normal saline, patients in group T (n = 80) received 1 mg/kg intravenous infusion of tramadol in 100 ml of normal saline, and patients in group C (n = 80) received 100 ml of normal saline as control. The following parameters were assessed: heart rate, mean arterial blood pressure, SPo2 and core temperature at the following times: 0 time, 5 min,10 min, 15 min, then every 15 min till end of the surgery. The incidence and intensity of shivering during the operation were recorded. Results: Study found statistically significant decrease in the incidence of shivering in group G, group D, and group T in comparison with group C without statistical significant difference between group G, group D, and group T. There was no statistical significant difference in the core temperature between the four groups. Conclusion: Preoperative administration of granisetron, dexmedetomidine, and tramadol was effective in decreasing the incidence and intensity of post subarachnoid shivering without increasing the incidence of the side effects.

To cite this article: Ahmed Zein El Abdein Mohamed (2016) Assessment of the analgesic potency of ropivacaine 0.2% versus ropivacaine 0.5% in transversus abdominis plane block after cesarean deliveryAbstract Background: Transversus abdominis plane (TAP) block provides sensory block from T6 to L1. It is one of the most widely used regional analgesic techniques and important component of multimodal approach for postoperative analgesia in multiple lower abdominal surgeries. Objective: To compare between the analgesic potency of ropivacaine 0.2% and ropivacaine 0.5% when used in transversus abdominis plane (TAP) block for post operative analgesia after cesarean delivery. Patients and methods: Fifty parturients with American society of Anesthesiologists Physical Status I or II aged between 25 and 35 years undergoing cesarean delivery with general anesthesia were included in this prospective, randomized, double blind study. They were randomly divided into 2 groups according to the concentration of ropivacaine used in TAP block. The 1st group received bilateral 20 ml of 0.2% ropivacaine while the 2nd received the same volume of 0.5% ropivacaine at the end of the surgery. Intensity of postoperative pain at rest and during movement, time to 1st analgesic request, total dose of tramadol used, time to 1st mobilization from bed, parturients satisfaction of pain management, and complications of TAP block were recorded. Results: Visual Analogue Scale (VAS) at rest and during movement, time to 1st analgesic request, total dose of tramadol, time to 1st mobilization from bed, patients satisfaction of pain management were comparable between the two groups. Conclusion: Ropivacaine 0.2% when used in TAP block provided postoperative analgesia similar to ropivacaine 0.5% in TAP block after cesarean delivery.

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