PDF(Pubmed)
Abstract：
OBJECTIVE: Compare thermal variation in the region of the External Acoustic Canal (EAC) and the Round Window (RW) using different rigid endoscopes and light sources in human temporal bones.
METHODS: This is an analytical experimental study using human temporal bones. Thermal variation was assessed during ten minutes, using a thermometer in the region of the EAC and the RW of two temporal bones, right and left. We used three different endoscopes (0° 4-mm, 0° 3-mm and 30° 4-mm) and five intensity/type light source (Halogen 100%, LED 50%, LED 100%, Xenon 50% and Xenon 100% with the same endoscope light fiber.
RESULTS: We found temperature elevations in the EAC and RW in all measurements. Larger caliber endoscopes (4-mm) and light sources at 100% intensity generated higher temperatures, slightly higher in halogen and xenon. The 30° endoscopes tended to put more heat on structures, with little difference in most measurements. We identified greater temperature variations in the EAC of the right and left temporal bones compared to the RW overall. The highest temperature acquired in the present study was in the EAC of the temporal bone with a 4-mm and 30° endoscope, using xenon light source (intensity of 100%), with an increase of 4.51 °C.
CONCLUSIONS: The type of endoscope and light source can influence the thermal variation and the risk of tissue injury during endoscopic ear surgery. Larger endoscopes with xenon and halogen light sources at maximum intensity generate more heat.
METHODS:
METHODS: This is an analytical experimental study using human temporal bones. Thermal variation was assessed during ten minutes, using a thermometer in the region of the EAC and the RW of two temporal bones, right and left. We used three different endoscopes (0° 4-mm, 0° 3-mm and 30° 4-mm) and five intensity/type light source (Halogen 100%, LED 50%, LED 100%, Xenon 50% and Xenon 100% with the same endoscope light fiber.
RESULTS: We found temperature elevations in the EAC and RW in all measurements. Larger caliber endoscopes (4-mm) and light sources at 100% intensity generated higher temperatures, slightly higher in halogen and xenon. The 30° endoscopes tended to put more heat on structures, with little difference in most measurements. We identified greater temperature variations in the EAC of the right and left temporal bones compared to the RW overall. The highest temperature acquired in the present study was in the EAC of the temporal bone with a 4-mm and 30° endoscope, using xenon light source (intensity of 100%), with an increase of 4.51 °C.
CONCLUSIONS: The type of endoscope and light source can influence the thermal variation and the risk of tissue injury during endoscopic ear surgery. Larger endoscopes with xenon and halogen light sources at maximum intensity generate more heat.
METHODS:
摘要：
目的：在人颞骨中使用不同的刚性内窥镜和光源比较外部声管（EAC）和圆窗（RW）区域的热变化。
方法：这是一项使用人类颞骨的分析性实验研究。在十分钟内评估热变化，在EAC和两个颞骨的RW区域使用温度计，右和左。我们使用了三种不同的内窥镜（0°4毫米，0°3-mm和30°4-mm）和五个强度/类型的光源（卤素100％，LED50%,LED100%,50％的氙气和100％的氙气具有相同的内窥镜光纤。
结果：我们在所有测量中发现了EAC和RW的温度升高。较大口径的内窥镜（4毫米）和100％强度的光源产生更高的温度，稍高的卤素和氙气。30°内窥镜倾向于将更多的热量放在结构上，在大多数测量中几乎没有差异。与整个RW相比，我们发现左右颞骨的EAC温度变化更大。本研究中获得的最高温度是在4毫米和30°内窥镜下颞骨的EAC中，使用氙气光源（强度为100％），增加4.51°C
结论：内窥镜和光源的类型会影响内窥镜耳手术中的热变化和组织损伤的风险。具有最大强度的氙气和卤素光源的较大内窥镜产生更多的热量。
方法：
方法：这是一项使用人类颞骨的分析性实验研究。在十分钟内评估热变化，在EAC和两个颞骨的RW区域使用温度计，右和左。我们使用了三种不同的内窥镜（0°4毫米，0°3-mm和30°4-mm）和五个强度/类型的光源（卤素100％，LED50%,LED100%,50％的氙气和100％的氙气具有相同的内窥镜光纤。
结果：我们在所有测量中发现了EAC和RW的温度升高。较大口径的内窥镜（4毫米）和100％强度的光源产生更高的温度，稍高的卤素和氙气。30°内窥镜倾向于将更多的热量放在结构上，在大多数测量中几乎没有差异。与整个RW相比，我们发现左右颞骨的EAC温度变化更大。本研究中获得的最高温度是在4毫米和30°内窥镜下颞骨的EAC中，使用氙气光源（强度为100％），增加4.51°C
结论：内窥镜和光源的类型会影响内窥镜耳手术中的热变化和组织损伤的风险。具有最大强度的氙气和卤素光源的较大内窥镜产生更多的热量。
方法：
