Hensman C, Hanna G B, Drew T, Moseley H, Cuschieri A
Department of Surgery, Ninewells Hospital and Medical School, University of Dundee, Scotland.
Surg Endosc. 1998 Apr;12(4):335-7. doi: 10.1007/s004649900665.
Skin burns and ignition of drapes have been reported with the use of cold light sources. The aim of the study was to document the temperature generated by cold light sources and to correlate this with the total radiated power and infrared output.
The temperature, total radiated power, and infrared output were measured as a function of time at the end of the endoscope (which is inserted into the operative field) and the end of the fiber optic bundle of the light cable (which connects the cable to the light port of the endoscope) using halogen and xenon light sources.
The highest temperature recorded at the end of the endoscope was 95 degrees C. The temperature measured at the optical fiber location of the endoscope was higher than at its lens surface (p < 0.0001). At the end of the fiber optic bundle of light cables, the temperature reached 225 degrees C within 15 s. The temperature recorded at the optical fiber location of all endoscopes and light cables studied rose significantly over a period of 10 min to reach its maximum (p <0.0001) and then leveled off for the duration of the study (30 min). The infrared output accounted only for 10% of the total radiated power.
High temperatures are reached by 10 min at the end of fiber optic bundle of light cables and endoscopes with both halogen and xenon light sources. This heat generation is largely due to the radiated power in the visible light spectrum.
有报道称使用冷光源会导致皮肤灼伤和手术巾着火。本研究的目的是记录冷光源产生的温度，并将其与总辐射功率和红外输出相关联。
使用卤素光源和氙气光源，在内窥镜末端（插入手术区域）和光缆光纤束末端（连接光缆与内窥镜光端口）测量温度、总辐射功率和红外输出随时间的变化。
内窥镜末端记录到的最高温度为95摄氏度。在内窥镜光纤位置测得的温度高于其透镜表面（p<0.0001）。在光缆光纤束末端，温度在15秒内达到225摄氏度。在研究的所有内窥镜和光缆的光纤位置记录的温度在10分钟内显著上升至最高值（p<0.0001），然后在研究持续期间（30分钟）趋于平稳。红外输出仅占总辐射功率的10%。
使用卤素光源和氙气光源时，光缆和内窥镜的光纤束末端在10分钟内会达到高温。这种热量产生主要归因于可见光谱中的辐射功率。
