Chittawatanarat Kaweesak, Akanitthaphichat Siriwasan
Department of Surgery, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
J Med Assoc Thai. 2009 Nov;92(11):1428-33.
Hypothermia is a common complication in the hypovolemic patient. Warm intravenous fluids have proven valuable at preventing this complication during volume replacement. The microwave oven is considered an applicable alternative method for warming fluids but no protocol has been established.
To evaluate the efficacy and affected variables of the microwave oven in warming crystalloid fluids and to determine the appropriate formula for calculating the warming duration.
The important variables influencing the operation of the microwave oven include the difference between the crystalloid fluid and room temperature, the microwave oven's capability, variations in microwave irradiation, and fluid shaking. The appropriate formula for calculating warming duration is: Duration (sec) = Volume (cc) x 4.2j.g(-1).K(-1) x Raised temperature DeltaT (K) x 1.1 (Adjusted power) / Mivcwrowave power (W).
The microwave oven is a safe and practical method for warming crystalloid fluids.
体温过低是低血容量患者常见的并发症。在容量替代过程中，温热的静脉输液已被证明对预防该并发症有价值。微波炉被认为是一种适用的液体加温替代方法，但尚未建立相关方案。
评估微波炉加温晶体液的疗效和影响变量，并确定计算加温持续时间的合适公式。
影响微波炉操作的重要变量包括晶体液与室温的差异、微波炉的功率、微波辐射的变化以及液体摇晃。计算加温持续时间的合适公式为：持续时间（秒）=体积（立方厘米）×4.2焦耳·克⁻¹·开⁻¹×升高温度ΔT（开）×1.1（调整功率）/微波功率（瓦）。
微波炉是加温晶体液的一种安全实用的方法。
