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• W57794469 abstract "Postoperative shivering and hypothermia are common problems seen In patients recovering from anaesthesia. Both of these post-operative conditions are dangerous to the recovering patient and require intcrvention. Although there are various techniqucs available to treat postoperative shivering and the underlying hypothema, the incidence of occurrence is still unacceptable. The aim of this study was to test the hypotheses that applying radiant heat on the blush area inhibits shivering, as well as inhibiting peripheral vasoconstriction, thereby increasing the effectiveness of the convective rewarming technique. In a vasodilated individual more heat energy is transferred to thc venous blood in the periphery, and therefore, to the patient's core. Applying radiant heat to the blush area activates the trigerninal nerve heat sensors. This heat stinlulation overrides thc cold sensors' input to the hypothalamus, and thereby lowers the vasoconstriction and shivering thresholds. This mechanism thus helps to prevent vasoconstriction of the pcriphery, as well as inhibiting shivering. Post-operative cardiac surgical patients were divided into two rewarming groups consisting of 1. the convective rewarming technique (BH) (n=16), 2. the combination of convective rewarming technique and radiant heat (41) on the blush area (RH) (n=17). Both groups were investigated from entry into the postanaesthetic recovery room to normothennia, by continually measuring core temperature (Tc, T), mean skin temperature (Tsk, T), forearm-fingertip temperature gradient (Tsk-gr), and shivering by the VOSS scale and electromyography (EMG). Patients with radiant hcat required significantly less rewarming time (p=0.0016), with the rewarming rate ( T h i n ) being significantly higher (p=0.004). There was no difference between groups in mean skin temperatures at minute 1, but the radiant heat group was significantly warmer (p<0.0001) at minutes 26, 52, and 72. The foream-fingertip temperature gradlent measurc which reflects peripheral vasoconstriction indicated there was no statistical difference between groups at minute 1, but the radiant heat group was significantly less vasoconstricted (p=0.0072) at minutes 25, 50, and 70. The radiant heat group shivered significantly (p=0.000023) less often and less severely than the convective heat group by the VOSS measure. Collectively these results strongly support using radiant heat as an integral rewarming technique for postoperativc cardiac surgical patients. This study found that applying radiant heat on the blush area inhibits shivering and peripheral vasoconstriction, thereby leading to a more effective postoperative rewarming technique. Clinically these findings translate into a healthier postoperative recovery for patients." @default.
• W57794469 created "2016-06-24" @default.
• W57794469 creator A5019512609 @default.
• W57794469 date "1997-01-01" @default.
• W57794469 modified "2023-09-28" @default.
• W57794469 title "The rewarming effects of radiant heat on the blush area in postoperative cardiac surgical patients" @default.
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