Effects of preoperative oral carbohydrate solution intake on thermoregulation

Abstract

BackgroundWe aimed to investigate the oral carbohydrate solution administered preoperatively on thermoregulation.Material/MethodsThe study included 40 female patients under general anesthesia. Patients were randomly divided into 2 groups: Group CONT (stopped oral implementation 8 h before the operation) and Group CHO (800ml oral carbohydrate fluid 8 h before the operation and 400ml oral carbohydrate fluid 2 h before the operation). Patients were monitored as standard and temperature probes were placed. Temperatures were recorded immediately before anesthetics induction, 5 min after the anesthetics induction, and in the post-anesthesia care unit (PACU) every 10 min. Mean skin temperature (Tsk), mean body temperature (Tb), and vasoconstriction threshold were estimated.ResultsIn general, we observed a decrease in tympanic temperature and Tb following anesthetic administration in groups, and increase in Tsk, and an increase in all 3 of these levels in the recovery unit. Tympanic temperature was significantly higher at 25, 55, 65, and 95 min after induction in Group CONT compared to Group CHO (p<0.05). Tsk was found to be lower in Group CONT compared to Group CHO in almost all periods. In PACU, it was found that the tympanic temperature was higher in Group CONT compared to Group CHO at 60 min (p<0.05). Postoperative shivering score was found to be significantly higher in Group C (p<0.01). Vasoconstriction threshold was higher in Group CONT than Group CHO.ConclusionsOral carbohydrate solution administered was established to have effects thought to be negative on tympanic temperature, vasoconstriction, and vasoconstriction threshold.

The Effect of Preoperative Oral Carbohydrate or Oral Rehydration Solution on Postoperative Quality of Recovery: A Randomized, Controlled Clinical Trial

“…However, in this study, no surgical procedures had been performed, which may not accurately reflect a clinical practice. In a clinical study that investigated the effects of preoperative CHO intake on thermoregulation, significant decreases in postoperative shivering were reported in the CHO group compared to the control group, but no differences were apparent in intraoperative temperatures [ 20 ]. Preoperative intake of CHO or ORS may have some effect on the prevention of intraoperative hypothermia, but the effects are probably too minor to cause any significant changes in temperature.…”

Effect of Preoperative Oral Carbohydrate Loading on Body Temperature During Combined Spinal-Epidural Anesthesia for Elective Cesarean Delivery

“…Yatabe et al 8 demonstrated in an animal experiment that preoperative oral carbohydrate loading reduced hypothermia in rats during general anesthesia; however, this result was not confirmed in clinical studies. Ozer et al 12 conducted a randomized controlled trial of female patients during general anesthesia for the removal of hysteromyoma. Although the incidence of postoperative shivering was significantly reduced in patients who consumed carbohydrates before surgery compared with the group C, no significant difference in intraoperative body temperature was found between the 2 groups.…”

“…Although the incidence of postoperative shivering was significantly reduced in patients who consumed carbohydrates before surgery compared with the group C, no significant difference in intraoperative body temperature was found between the 2 groups. Ozer et al 12 concluded that if preoperative carbohydrate loading had an effect on the prevention of intraoperative hypothermia, the effect was too small to be measurable and/or clinically significant. In a study by Hamamoto et al, 14 patients who underwent preoperative carbohydrate loading before receiving general anesthesia for laparoscopic colon surgery had a higher Tc than the group C on entering the operating room but had a significantly lower Tc than the group C at 150 minutes after surgery.…”

“…Yatabe et al 8 demonstrated in an animal experiment that preoperative oral carbohydrate loading reduced hypothermia in rats during general anesthesia; however, this result was not confirmed in clinical studies. Ozer et al 12 conducted a randomized controlled trial of female patients during general anesthesia for the removal of hysteromyoma.…”

“…At the same time, skin temperatures at different body parts (chest, arm, 1/2 inner midface of the forearm, ventral face of the distal phalanx of the middle finger, thigh, and calf) were measured, and the mean body surface temperature (Ts1) was calculated using the formula 0.3 × (chest surface temperature + forearm surface temperature) + 0.2 × (thigh surface temperature + calf surface temperature). 12 The actual room temperature (as indicated in the thermostat in the operating room) was recorded. An 18-gauge cannula was used to access the veins of the right upper extremity, and 6% hydroxyethyl starch solution 500 mL (20 mL•min −1 ) was used for coloading and was followed by continuous infusion of lactated Ringer's solution (10 mL•min −1 ).…”