Abstract

Background: Shivering is common in cesarean section under neuraxial anesthesia. This study was designed with the aim of investigating and comparing the effect of two different temperatures of Marcaine (6 and 24 C-degrees) on shivering during and after cesarean section. Materials and Methods: In this double-blind clinical trial study, 64 women candidates for cesarean were randomly divided into two groups (32): the group receiving Marcaine with room temperature (24 C-degrees) and the group receiving Marcaine with refrigerator temperature (6 C-degrees). Spinal anesthesia was performed in the sitting position in the space between L4 -L5 and using a 25 G needle. The patient was placed in the supine position. The variables, shivering, central body temperature, systolic, diastolic and mean arterial blood pressure, heart rate, level of sensory block, use of pain reliever supplement and nausea and vomiting after anesthesia were recorded at specific times and compared between two groups. The obtained data were analyzed using SPSS version 22 software. Results: There was no statistically significant difference between the two groups in terms of age distribution and gestational age. Shivering at 30, 45, 60, 75, 90, 105, 120 and 135 minutes after spinal anesthesia was significantly higher in the 6 degree group. In the 6 degree group, grade 3 and 4 tremors at all times, grade 2 at all times except minutes 10, 15, and 60, and grade 1 at all times except minute 75 had a greater and sometimes equal frequency compared to the 24 degree group. The average core body temperature was significantly lower in the 6 degree group at all times. The mean systolic blood pressure at 30 minutes, diastolic blood pressure at 5, 15, and 30 minutes, and mean arterial blood pressure at 20, 30, and 45 minutes after spinal anesthesia were significantly higher in the 6degree group. The two groups had no statistically significant differences in terms of heart rate variables, level of sensory block, use of pain reliever supplements, and nausea and vomiting at any time. Conclusion: According to the results obtained from the present study and similar studies, Marcaine kept at the temperature of the operating room (24 degrees) compared to the temperature of the refrigerator (6 degrees) effectively reduces shivering during and after cesarean section.