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Japan supercomputer shows humidity affects aerosol spread of coronavirus

FILE PHOTO: computer image created by Nexu Science Communication together with Trinity College in Dublin, shows a model structurally representative of a betacoronavirus which is the type of virus linked to COVID-19, better known as the coronavirus linked to the Wuhan outbreak, shared with Reuters on February 18, 2020. NEXU Science Communication/via REUTERS

TOKYO (Reuters) – A Japanese supercomputer showed that humidity can have a large effect on the dispersion of virus particles, pointing to heightened coronavirus contagion risks in dry, indoor conditions during the winter months.

The finding suggests that the use of humidifiers may help limit infections during times when window ventilation is not possible, according to a study released on Tuesday by research giant Riken and Kobe University.

The researchers used the Fugaku supercomputer to model the emission and flow of virus-like particles from infected people in a variety of indoor environments.

Air humidity of lower than 30% resulted in more than double the amount of aerosolised particles compared to levels of 60% or higher, the simulations showed.

The study also indicated that clear face shields are not as effective as masks in preventing the spread of aerosols. Other findings showed that diners are more at risk from people to their side compared to across the table, and the number of singers in choruses should be limited and spaced out.

The research team led by Makoto Tsubokura has previously used the Fugaku supercomputer to model contagion conditions in trains, work spaces, and class rooms.

Reporting by Rocky Swift; Editing by Michael Perry

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Reflow Medical Receives Approval in Japan for the Wingman Catheter to Cross Chronic Total Occlusions (CTOs) in Peripheral Artery Disease

Reflow Medical, Inc., a California-based medical device company, announced that Japan’s Pharmaceuticals and Medical Devices Agency (PMDA) has approved the Wingman™ CTO Catheter. Reflow Medical has partnered with Century Medical, Inc. (CMI), a leading medical device distributor based in Tokyo, to introduce the Wingman CTO Catheter in Japan.

This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20201008005741/en/

Wingman CTO Catheter (Photo: Business Wire)

The Wingman Catheter crosses peripheral CTOs using an extendable beveled tip. The physician controls the advancement and activation of the tip to create a channel to help penetrate, or cross, the occlusion with a guidewire, enabling further treatment of the lesion with therapeutic devices. The catheter is compatible with the physician’s preferred guidewire and procedural technique.

Approval by Japan’s PMDA follows the completion of the Wing-IT CTO clinical trial, a prospective, international, multicenter study that treated 85 patients and followed them for 30 days. The Wingman Catheter was able to demonstrate a 90% crossing rate when up to two previous guidewires could not cross the CTOs, meeting its primary safety and efficacy endpoints.

“We are very excited to launch the Wingman CTO catheter in the Japanese market,” said CMI President and CEO Takahiko Motani. “This product should have a significant impact on the Japanese peripheral market by helping physicians address specific treatment challenges within a growing patient population. We look forward to providing this new and unique device in partnership with Reflow Medical, Inc.”

“Reflow Medical focuses their efforts on developing technologies based on physicians’ needs,” said John R. Laird, MD, of Adventist Heart and Vascular Institute in St. Helena, California. Dr. Laird was the principal investigator for the study. “We rely on Reflow for real clinical evidence when utilizing the technology.”

“It is an honor for our device to have gained approval by Japan’s PMDA,” noted Reflow Medical Co-founder and CEO Isa Rizk. “We are grateful for the opportunity to partner with a fantastic organization like Century Medical.”

Reflow’s Wingman Crossing Catheter received clearance from the U.S. Food and Drug Administration for the expanded CTO indication for the Wingman Crossing Catheter in March 2020 after completing the Wing-IT clinical trial.

About Reflow Medical, Inc.

Reflow Medical, Inc. is a private company focused on empowering physicians through the design and development of innovative and effective technologies for cardiovascular disease. Reflow is developing a family of products to treat cardiovascular disease.

About Century Medical, Inc.

Century Medical, Inc. (CMI) is one of the largest independent medical device distributors in Japan, with more than 40 years of experience marketing medical devices. CMI has been a pioneering force, successfully introducing many new technologies to the Japanese healthcare community. Century Medical, Inc, is a wholly owned subsidiary of ITOCHU Corporation.

About Chronic Total Occlusions (CTO) in Peripheral Artery Disease (PAD)

Chronic total occlusions (CTO) of the lower extremities are found in 40% of symptomatic peripheral artery disease (PAD) patients. Endovascular options for the treatment of a CTO can be complex; conventional wire and catheter technique have a