Risk assessment of mixed and displacement ventilation (LAF) during orthopedic and trauma surgery on COVID-19 patients with increased release of infectious aerosols.

Kramer A Institute of Hygiene and Environmental Medicine, University Medicine Greifswald, Germany.
Külpmann R Lucerne University of Applied Sciences and Arts, E & A, Horw, Switzerland.
Brunner A Brunner Consulting, Pfaeffikon ZH, Switzerland.
Müller M Center for Musculoskeletal Surgery, Charité - University Medicine Berlin, Germany.
Wassilew G Clinic and Ambulance for Orthopedic and Orthopedic Surgery, University Medicine Greifswald, Germany.