Abstract
Background: In laparoscopic surgery, fogging of the lens tip instantly degrades the quality of image and interrupts the flow of surgical maneuvers. External warming devices prevent fogging for a certain length of time, but use of them is troublesome at best. These problems prompted us to develop a fogless mechanism built into the scope so that the fogless image would be continuous and trouble-free. We then conducted several experiments that demonstrate the precise effect it has on the lens tip.
Methods: The infrared radiation pyrometer was used to compare the temperature distribution as well as the temperature change against time of each lens tip of the fogless and ordinary laparoscopes.
Results: The temperature of the lens tip of the ordinary scope did not change, but that of the fogless scope rose to 41°C in 184–208 s.
Conclusions: The fogless mechanism effectively warms the lens tip to a safe temperature that prevents fogging in the intraabdominal environment.
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Received: 11 September 1996/Accepted: 14 December 1996
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Hashimoto, D., Shouji, M. Development of a fogless scope and its analysis using infrared radiation pyrometer. Surg Endosc 11, 805–808 (1997). https://doi.org/10.1007/s004649900458
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DOI: https://doi.org/10.1007/s004649900458