Matsuwaki Clinic Shinagawa, Tokyo, Japan.
Olympus Medical Systems Corporation, Tokyo, Japan.
PLoS One. 2022 Jun 10;17(6):e0268974. doi: 10.1371/journal.pone.0268974. eCollection 2022.
The coronavirus disease pandemic has raised concerns regarding the transmission of infections to healthcare workers. We developed a new protective device to reduce the risk of aerosol diffusion and droplet infection among healthcare workers. Here, we report the results of a theoretical evaluation of the efficacy of this device.
We used suction-capable masks with and without rubber slits, sleeves for the insertion section of endoscopes and treatment tools, and a cover for the control section of the endoscope. To simulate droplet spread from patients, we created a droplet simulation model and an aerosol simulation model. The results with and without the devices attached and with and without the suction were compared.
The droplet simulation model showed a 95% reduction in droplets with masks with rubber slits; furthermore, a reduction of 100% was observed when the insertion sleeve was used. Evaluation of aerosol simulation when suction was applied revealed an aerosol reduction of 98% and >99% with the use of the mask without rubber slits and with the combined use of the mask and insertion sleeve, respectively. The elimination of droplet emission upon instrument removal confirmed that the instrument sleeve prevented the diffusion of droplets. The elimination of droplets upon repeated pressing of the suction button confirmed that the cover prevented the diffusion of droplets.
We developed a device for infection control, in collaboration with a gastrointestinal endoscopist and Olympus Medical Systems Corporation, that was effective in reducing droplet and aerosol diffusion in this initial theoretical assessment.
冠状病毒病大流行引起了人们对感染向医护人员传播的担忧。我们开发了一种新的防护装置，以降低医护人员气溶胶扩散和飞沫感染的风险。在此，我们报告了该设备功效的理论评估结果。
我们使用带和不带橡胶狭缝的吸气口罩、内窥镜和治疗工具的插入部分的套管以及内窥镜控制部分的盖。为了模拟来自患者的飞沫扩散，我们创建了一个飞沫模拟模型和一个气溶胶模拟模型。比较了有和没有设备以及有和没有吸气的结果。
飞沫模拟模型显示带有橡胶狭缝的口罩可将飞沫减少 95%；此外，当使用插入套管时，观察到减少 100%。当应用吸气进行气溶胶模拟评估时，发现使用无橡胶狭缝的口罩和组合使用口罩和插入套管时，气溶胶减少分别为 98%和>99%。器械移除时消除飞沫排放证实了器械套管可防止飞沫扩散。反复按下吸气按钮时消除了飞沫，证实了盖子可防止飞沫扩散。
我们与胃肠内窥镜专家和奥林巴斯医疗系统公司合作开发了一种感染控制装置，在最初的理论评估中，该装置在减少飞沫和气溶胶扩散方面非常有效。
