MacKeith S A C, Frampton S, Pothier D D
Department of ENT, St Michael's Hospital, Bristol, UK.
J Laryngol Otol. 2008 Jul;122(7):711-4. doi: 10.1017/S0022215107000734. Epub 2007 Oct 17.
To measure the thermal properties of operative endoscopes used in otorhinolaryngological practice.
A series of endoscopes of varying diameters and angulations were attached to a light source and temperature measurements taken of their shaft and tip; a measurement was also taken 5 mm in front of the endoscope tip.
Temperature changes took place rapidly. The amount of heat produced by the endoscopes was maximal at the tip, with larger diameter endoscopes attaining a higher temperature. Temperatures on the shaft and in front of the tip reached relatively constant temperatures independent of the type of endoscope. The maximum temperature achieved was 104.6 degrees C for the 4 mm, 0 degrees endoscope. Cooling occurred rapidly after the light source was switched off.
The heat produced by some endoscopes is sufficiently great to cause thermal injury to tissues. Awareness of the temperatures produced by these endoscopes should prompt clinicians to actively cool their endoscopes during a procedure, before any thermal injury is caused.
测量耳鼻咽喉科手术中使用的手术内窥镜的热性能。
将一系列不同直径和角度的内窥镜连接到光源上，对其镜杆和尖端进行温度测量；还在内窥镜尖端前方5毫米处进行了测量。
温度变化迅速。内窥镜产生的热量在尖端处最大，直径较大的内窥镜达到的温度更高。镜杆和尖端前方的温度达到相对恒定的温度，与内窥镜的类型无关。4毫米、0度的内窥镜达到的最高温度为104.6摄氏度。光源关闭后冷却迅速。
一些内窥镜产生的热量足以对组织造成热损伤。了解这些内窥镜产生的温度应促使临床医生在手术过程中，在造成任何热损伤之前，积极对内窥镜进行冷却。
