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Abstract：
OBJECTIVE: To create an aerosol containment mask (ACM) for common otolaryngologic endoscopic procedures that also provides nanoparticle-level protection to patients.
METHODS: Prospective feasibility study .
METHODS: In-person testing with a novel ACM.
METHODS: The mask was designed in Solidworks and 3D printed. Measurements were made on 10 healthy volunteers who wore the ACM while reading the Rainbow Passage repeatedly and performing a forced cough or sneeze at 5-second intervals over 1 minute with an endoscope in place.
RESULTS: There was a large variation in the number of aerosol particles generated among the volunteers. Only the sneeze task showed a significant increase compared with normal breathing in the 0.3-µm particle size when compared with a 1-tailed t test (P = .013). Both the 0.5-µm and 2.5-µm particle sizes showed significant increases for all tasks, while the 2 largest particle sizes, 5 and 10 µm, showed no significant increase (both P < .01). With the suction off, 3 of 30 events (2 sneeze events and 1 cough event) had increases in particle counts, both inside and outside the mask. With the suction on, 2 of 30 events had an increase in particle counts outside the mask without a corresponding increase in particle counts inside the mask. Therefore, these fluctuations in particle counts were determined to be due to random fluctuation in room particle levels.
CONCLUSIONS: ACM will accommodate rigid and flexible endoscopes plus instruments and may prevent the leakage of patient-generated aerosols, thus avoiding contamination of the room and protecting health care workers from airborne contagions.
METHODS: 2.
METHODS: Prospective feasibility study .
METHODS: In-person testing with a novel ACM.
METHODS: The mask was designed in Solidworks and 3D printed. Measurements were made on 10 healthy volunteers who wore the ACM while reading the Rainbow Passage repeatedly and performing a forced cough or sneeze at 5-second intervals over 1 minute with an endoscope in place.
RESULTS: There was a large variation in the number of aerosol particles generated among the volunteers. Only the sneeze task showed a significant increase compared with normal breathing in the 0.3-µm particle size when compared with a 1-tailed t test (P = .013). Both the 0.5-µm and 2.5-µm particle sizes showed significant increases for all tasks, while the 2 largest particle sizes, 5 and 10 µm, showed no significant increase (both P < .01). With the suction off, 3 of 30 events (2 sneeze events and 1 cough event) had increases in particle counts, both inside and outside the mask. With the suction on, 2 of 30 events had an increase in particle counts outside the mask without a corresponding increase in particle counts inside the mask. Therefore, these fluctuations in particle counts were determined to be due to random fluctuation in room particle levels.
CONCLUSIONS: ACM will accommodate rigid and flexible endoscopes plus instruments and may prevent the leakage of patient-generated aerosols, thus avoiding contamination of the room and protecting health care workers from airborne contagions.
METHODS: 2.
摘要：
目的：为耳鼻喉科普通内镜手术制造一种气溶胶防护罩（ACM），同时为患者提供纳米颗粒水平的保护。
方法：前瞻性可行性研究。
方法：使用新型ACM进行面对面测试。
方法：面罩是在Solidworks中设计并3D打印的。对10名健康志愿者进行了测量，这些志愿者戴着ACM，同时反复阅读彩虹通道，并在1分钟内以5秒的间隔用内窥镜进行强迫咳嗽或打喷嚏。
结果：志愿者之间产生的气溶胶颗粒数量差异很大。与单尾t检验相比，在0.3μm的粒径下，只有打喷嚏任务显示出显着增加（P=.013）。对于所有任务，0.5-µm和2.5-µm的粒径均显示出显着增加，而两个最大的颗粒尺寸，5和10µm，均无显著增加(P均<0.01)。随着吸力的关闭，30例事件中的3例（2例打喷嚏事件和1例咳嗽事件）颗粒计数增加，面具的内外。随着吸力的开启，30个事件中的2个事件在掩模外部具有颗粒计数的增加,而掩模内部的颗粒计数没有相应的增加。因此,粒子数的这些波动被确定为是由于室内粒子水平的随机波动。
结论：ACM将容纳刚性和柔性内窥镜以及器械，并可能防止患者产生的气溶胶泄漏，从而避免房间受到污染，并保护医护人员免受空气传染。
方法：2.
方法：前瞻性可行性研究。
方法：使用新型ACM进行面对面测试。
方法：面罩是在Solidworks中设计并3D打印的。对10名健康志愿者进行了测量，这些志愿者戴着ACM，同时反复阅读彩虹通道，并在1分钟内以5秒的间隔用内窥镜进行强迫咳嗽或打喷嚏。
结果：志愿者之间产生的气溶胶颗粒数量差异很大。与单尾t检验相比，在0.3μm的粒径下，只有打喷嚏任务显示出显着增加（P=.013）。对于所有任务，0.5-µm和2.5-µm的粒径均显示出显着增加，而两个最大的颗粒尺寸，5和10µm，均无显著增加(P均<0.01)。随着吸力的关闭，30例事件中的3例（2例打喷嚏事件和1例咳嗽事件）颗粒计数增加，面具的内外。随着吸力的开启，30个事件中的2个事件在掩模外部具有颗粒计数的增加,而掩模内部的颗粒计数没有相应的增加。因此,粒子数的这些波动被确定为是由于室内粒子水平的随机波动。
结论：ACM将容纳刚性和柔性内窥镜以及器械，并可能防止患者产生的气溶胶泄漏，从而避免房间受到污染，并保护医护人员免受空气传染。
方法：2.
