Chang K S, Farrell R T, Snellen J W, King F G
Can Anaesth Soc J. 1984 Nov;31(6):690-4. doi: 10.1007/BF03008769.
The thermal insulation properties of metalized plastic sheeting (MPS), clear polyethylene sheeting (CPS) and 100 per cent polyester thermal bed blanket (TBB) were tested and compared quantitatively using direct calorimetry. The experiments were carried out on individual subjects sitting in a whole body calorimeter and covered first with a TBB bag up to the neck. Then the three materials were tested, one at a time, over the original TBB up to the neck. The temperature of the calorimeter was set at normal operating room temperature of 18 degrees C. MPS provided the greatest reduction in sensible heat loss (SHL) of all three materials tested. The total SHL saving provided by an MPS over TBB was 29.7 per cent and was statistically highly significantly different from that provided by a CPS or TBB over TBB (the difference is 9.6 and 9.9 per cent, respectively, p less than 0.001 for both). While the SHL saving provided by a CPS over TBB was 20.1 per cent, and a TBB over TBB was 19.8 percent, the difference of 0.3 per cent is statistically not significant (p greater than 0.5). An additional finding was that MPS is electrically conductive on one side. Precautions must be taken when it is used on patients connected to electrical devices. Also, insensible perspiration trapped inside the bag can be as much as 10 g X hour-1 and may become a problem when the patient is wrapped in MPS for an extended period of time.
使用直接量热法对镀金属塑料薄膜（MPS）、透明聚乙烯薄膜（CPS）和100%聚酯保暖床罩（TBB）的保温性能进行了测试并定量比较。实验在全身热量计中就座的个体受试者身上进行，首先用TBB袋覆盖至颈部。然后依次测试这三种材料，每次一种，覆盖在原有的TBB之上至颈部。热量计的温度设定为手术室正常工作温度18摄氏度。在测试的所有三种材料中，MPS在显热损失（SHL）方面降低幅度最大。MPS相对于TBB所节省的总SHL为29.7%，与CPS或TBB相对于TBB所节省的显热损失在统计学上有极显著差异（差异分别为9.6%和9.9%，两者p均小于0.001）。虽然CPS相对于TBB所节省的SHL为20.1%，TBB相对于TBB所节省的SHL为19.8%，但0.3%的差异在统计学上不显著（p大于0.5）。另一个发现是MPS一侧具有导电性。当用于连接电气设备的患者时必须采取预防措施。此外，袋子内积聚的不显性出汗量可达每小时10克，当患者长时间用MPS包裹时可能会成为一个问题。
