Ruth Merlin S, Sridharan Nivetha, Rai Ekta, Joselyn Anita S
Department of Anaesthesia, Christian Medical College and Hospital, Vellore, Tamil Nadu, India.
Department of Biostatistics, Christian Medical College and Hospital, Vellore, Tamil Nadu, India.
Saudi J Anaesth. 2020 Apr-Jun;14(2):200-205. doi: 10.4103/sja.SJA_791_19. Epub 2020 Mar 5.
Induction of general anesthesia and mandatory low-ambient temperature in the magnetic resonance imaging (MRI) suite renders the pediatric patient prone to fall in core temperature. Previously done studies have shown mixed results with core temperature showing both rise and fall.
The aim of this study is to evaluate which effect, hypothermia or hyperthermia, predominates in children anesthetized for MRI. Is the change in temperature the same across age groups and for different MRI scanners?.
Prospective, observational study in a tertiary care teaching hospital.
Two hundred and fifty children of age between 1 month and 16 years scheduled for MRI under propofol-based total intravenous anesthesia (TIVA) were recruited. A baseline core temperature (pre-scan) was recorded with the pediatric nasopharyngeal temperature probe after induction of anesthesia and also after the scan in the recovery room.
The study shows that there is a significant fall in temperature of 1.022°C (CI = 0.964, 1.081) following MRI ( < 0.001) but the difference across different age groups and type of MRI scanner used are not significant. There is a significant correlation between duration in the MRI room and a decrease in temperature ( value = 0.003). Using simple linear regression analysis, it is found that if there is a 1-min increase in the duration of MRI, there is a decrease of 0.006°C in temperature.
Vigilant temperature preservation strategies have to be maintained during the time the anesthetized child is present in the MRI suite. MRI compatible active warming devices are warranted especially in high turnover centers.
在磁共振成像（MRI）室进行全身麻醉诱导以及强制保持低环境温度会使儿科患者的核心体温易于下降。先前的研究结果不一，核心体温既有上升也有下降。
本研究的目的是评估在接受MRI麻醉的儿童中，体温过低或过高哪种影响占主导。不同年龄组和不同MRI扫描仪的温度变化是否相同？
在一家三级护理教学医院进行的前瞻性观察研究。
招募了250名年龄在1个月至16岁之间、计划在丙泊酚全静脉麻醉（TIVA）下进行MRI检查的儿童。在麻醉诱导后以及恢复室扫描后，使用儿科鼻咽温度探头记录基线核心体温（扫描前）。
研究表明，MRI检查后体温显著下降1.022°C（CI = 0.964，1.081）（P < 0.001），但不同年龄组和所使用的MRI扫描仪类型之间的差异不显著。在MRI室的停留时间与体温下降之间存在显著相关性（P值 = 0.003）。通过简单线性回归分析发现，如果MRI持续时间增加1分钟，体温会下降0.006°C。
在麻醉儿童处于MRI室期间，必须维持警惕的体温保持策略。特别是在高周转率的中心，需要使用与MRI兼容的主动保暖设备。
