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Background: Subarachnoid anesthesia also known as spinal anesthesia is now considered to be a safe form of anesthesia for lower abdominal and lower limb surgeries. The height of sensory block achieved in spinal anesthesia after drug administration can be altered by changing the position of the patient, and this precisely is the advantage of using hyperbaric local anesthetic drug. Aims and Objectives: The aim of this study is to compare the effect of position - horizontal and Trendelenburg on the height of sensory block in spinal anesthesia. Materials and Methods: After obtaining the institutional ethical clearance, total 66 patients scheduled for lower abdominal surgery under spinal anesthesia were selected and divided into two groups - Group A patients were placed in Trendelenburg position with 20° head down for 40 s and then returned to horizontal position and Group B patients were placed in horizontal position after spinal anesthesia. The level of sensory block was compared among the two groups at different points of time up to 30 min of drug administration. Results: The patients who remained in Trendelenburg position for 40 s after spinal anesthesia achieved a higher level of sensory block earlier as compared to the horizontal group and the maximum block height was two spinal segments higher than that of the horizontal group. Conclusion: From our current study, we can conclude that Trendelenburg position can be used to achieve a higher level of sensory block as compared to horizontal position after successful neuraxial block. [ABSTRACT FROM AUTHOR]

Objectives: This study aimed to evaluate the relative efficacy of prophylactic intravenous (IV) clonidine and tramadol for control of intraoperative shivering following spinal anesthesia. Materials and Methods: After institutional ethical clearance, 142 patients were chosen from either gender, aged 20-60 years, physical status American Society of Anesthesiology Class I and II scheduled for elective infraumbilical surgery under spinal anesthesia. Patients were randomized into two groups: Group C (n = 71) received injection clonidine 50 µg) IV in 100 ml normal saline (NS) over 10 min and Group T (n = 71) received injection tramadol 50 mg IV. In 100 ml NS over 10 min after spinal anesthesia. Results: Incidence of shivering was not significant when compared between the two groups (P > 0.05). The axillary temperatures fell significantly in Group C from the baseline and remained at a significantly lower level up to 60 min after rescue drug was administered in patients who shivered. There was a similar fall in axillary temperature in Group T in patients having shivering, but the difference was not significant. When compared between the two groups among patients who shivered, the difference in fall of temperature was not significant. Side effects such as hypotension, bradycardia, and sedation were significantly more common in clonidine group, whereas nausea was significantly more common patients of tramadol group. Conclusion: Prophylactic administration of both tramadol and clonidine is effective for controlling shivering under spinal anesthesia. However, tramadol is better because of higher response rate, less sedation, and lesser hemodynamic alterations. [ABSTRACT FROM AUTHOR]