Imani Farsad, Karimi Rouzbahani Hamid Reza, Goudarzi Mehrdad, Tarrahi Mohammad Javad, Ebrahim Soltani Alireza
Department of Anesthesia, Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Department of Epidemiology and Biostatics, School of Public Health, Lorestan University of Medical Sciences, Khorramabad, Iran.
Anesth Pain Med. 2016 Jan 17;6(1):e31046. doi: 10.5812/aapm.31046. eCollection 2016 Feb.
During anesthesia, continuous body temperature monitoring is essential, especially in children. Anesthesia can increase the risk of loss of body temperature by three to four times. Hypothermia in children results in increased morbidity and mortality. Since the measurement points of the core body temperature are not easily accessible, near core sites, like rectum, are used.
The purpose of this study was to measure skin temperature over the carotid artery and compare it with the rectum temperature, in order to propose a model for accurate estimation of near core body temperature.
Totally, 124 patients within the age range of 2 - 6 years, undergoing elective surgery, were selected. Temperature of rectum and skin over the carotid artery was measured. Then, the patients were randomly divided into two groups (each including 62 subjects), namely modeling (MG) and validation groups (VG). First, in the modeling group, the average temperature of the rectum and skin over the carotid artery were measured separately. The appropriate model was determined, according to the significance of the model's coefficients. The obtained model was used to predict the rectum temperature in the second group (VG group). Correlation of the predicted values with the real values (the measured rectum temperature) in the second group was investigated. Also, the difference in the average values of these two groups was examined in terms of significance.
In the modeling group, the average rectum and carotid temperatures were 36.47 ± 0.54°C and 35.45 ± 0.62°C, respectively. The final model was obtained, as follows: Carotid temperature × 0.561 + 16.583 = Rectum temperature. The predicted value was calculated based on the regression model and then compared with the measured rectum value, which showed no significant difference (P = 0.361).
The present study was the first research, in which rectum temperature was compared with that of skin over carotid artery, to find a safe location with easier access and higher accuracy for estimating near core body temperature. Results obtained in this study showed that, using a model, it is possible to evaluate near core body temperature in children, by measuring skin temperature over carotid artery.
在麻醉期间，持续的体温监测至关重要，尤其是在儿童中。麻醉会使体温丧失风险增加三到四倍。儿童体温过低会导致发病率和死亡率上升。由于核心体温的测量点不易获取，因此使用直肠等接近核心的部位。
本研究的目的是测量颈动脉处的皮肤温度，并将其与直肠温度进行比较，以提出一种准确估计接近核心体温的模型。
总共选取了124名年龄在2至6岁之间接受择期手术的患者。测量直肠温度和颈动脉处的皮肤温度。然后，将患者随机分为两组（每组62名受试者），即建模组（MG）和验证组（VG）。首先，在建模组中，分别测量直肠和颈动脉处皮肤的平均温度。根据模型系数的显著性确定合适的模型。将获得的模型用于预测第二组（VG组）的直肠温度。研究第二组中预测值与实际值（测量的直肠温度）之间的相关性。此外，从显著性方面检查这两组平均值的差异。
在建模组中，直肠平均温度和颈动脉平均温度分别为36.47±0.54°C和35.45±0.62°C。最终得到如下模型：颈动脉温度×0.561 + 16.583 = 直肠温度。根据回归模型计算预测值，然后与测量的直肠值进行比较，结果显示无显著差异（P = 0.361）。
本研究是首次将直肠温度与颈动脉处皮肤温度进行比较，以寻找一个更容易接近且准确性更高的安全位置来估计接近核心体温。本研究获得的结果表明，使用一个模型，通过测量颈动脉处的皮肤温度可以评估儿童的接近核心体温。
