The Effect On The Body Temperature Of Infants During Laparotomy By Different Temperature Setting Of Forced-air Warming System

Objective To explore the effect of different temperature of the forced-air warming system on the prevention of hypothermia during laparotomy of infants.Methods 90 infants undergoing laparotomy under general anesthesia were recruited and divided into three groups randomly with 30 cases each according to admit ting time;when used the force-air warming system intraoperatively,the three gro ups were respectively setting on 45℃(change to 43℃ after 45 minutes automat ically), 43℃and 38℃.The core temperature,heart rate and arterial pressure wer e respectively recorded before anesthesia and every 15 minutes after anesthesia(every 30 minutes after 1 hour).The blood loss,postoperative shivering and an esthesia recovery conditions were recorded simultaneously. The SPSS17.0 statistical software was used for data statistical analysis, and the test level is 0.05. General data were analyzed by descriptive analysis,chi-squaretest, one-way ANOVA and analysis of variance of repeated measurement.Results 1.There was no significant difference on the core temperature between thre e groups before anesthesia. Half an hour after the anaesthetic, the core temper ature of 45℃ group was(36.36±0.22)℃,43℃ group was(36.31±0.24)℃ and 38℃ group was(36.14±0.27)℃.The differences between three groups was statistic ally significant(P<0.01)(The differences between 45℃group and the 38℃grou p was statistically significant).One hour after the anaesthetic, the core temperat ure of 45℃ group was(36.39±0.26)℃,43℃ group was(36.19±0.22)℃ and 38℃ group was(35.96±0.21)℃.The differences between three groups was statistically significant(P<0.01). 2.The hypothermia incidence of 45℃group,43℃group,38℃group was 2/30,5/30,11/30 respectively and the differences between three groups was statisticall y significant(P<0.05). 3.The postoperative shivering incidence of 45℃group,43℃group,38℃group was 0/30,1/30,6/30 respectively and the differences between 45℃group and th e 38℃group was statistically significant(P<0.0167). 4.There was no significant difference between three groups for the heart r ates and mean artcrial pressure at each time point(P>0.05). 5.The time to complete consciousness of 45℃ group was(16.08±5.21)minut es,43℃ group was(20.48±4.47)minutes and 38℃ group was(23.04±5.13)minute s.The differences between three groups was statistically significant(P<0.01).The time totracheal extubation of 45℃ group was(18.95±7.25)minutes,43℃ group was(24.13±7.25)minutes and 38℃ group was(26.43±5.98)minutes.The differences between three groups was statistically significant(P<0.01).Conclusions The forced-air warming system can increase the infants’ peripheral tissue h eat content and reduce the heat losing.So that it will help decrease the intraop erative hypothermia incidence and shorten the anesthesia recovery period.Mean while the effect of the forced-air warming system which was setted 45℃ or 43℃was better than the 38℃ one.