Role of isothermic irrigation on preservation of body temperature in endoscopic ureteral stone surgery under spinal anesthesia

the patients were randomly divided into two groups by sealed envelope technique. the irrigation fluid was given at room temperature to the control group and the irrigation fluid for the study group was at body temperature. the irrigation fluid was heated by an incubator set at 37 celcius degrees and was protected in a non permenant heat protecting bag. The temperature of the irrigation solution was controlled by a digital thermometer by the study stuff. Room temperature, patient's body temperature were recorded before spinal anesthesia. Spinal anesthesia was performed by an anesthesiologist who was unaware of the heat of the irrigation fluid at L4-L5 interspace with 15mg 0.5% hyperbaric bupivacaine. the body temperature and the hemodynamic parameters were recorded each minute for the first 10 minutes and at 5 minute intervals till 30 minute after spinal anesthesia and at the end of the operation. the spinal anesthesia was monitored with loss of sensation to pinprick test at midclavicular line and recorded at the same time points with temperature measurements.