Portable aerosol hood to reduce spread of pathogens during medical procedures

A portable, transparent isolation box that facilitates safe practice of medical procedures on patients with infectious pathogens.
Technology No. 2020-302
IP Status: Provisional Patent Application Filed; Application #: 63/010,880


  • Protection equipment for care providers while performing aerosol generating medical procedures
  • Isolation chamber for patients carrying infectious diseases

Problem Addressed

Healthcare personnel who perform aerosol generating medical procedures such as endotracheal intubation & extubation are at acute risk of exposure to pathogens such as SARS-CoV-2. In addition, 20-30 minute mandatory waiting period between two patients significantly delays procedures and adds to the cost.


Researchers at the University of Minnesota have designed a portable isolation system for facilitating safe delivery of respiratory treatments to patients with highly infectious diseases. This system includes a transparent isolation box consisting of glove ports, a suction port fitted with HEPA filter to create negative pressure, and a partial open front through which the patient's upper body and medical equipment are introduced. The negative pressure created within the box is shown to ensure air flow can only exit through the HEPA filter, collecting infectious aerosolized particles and droplets, while leaving the air outside free of viral particles.

This isolation system has been demonstrated in hospitals to be suitable for performing aerosol generating procedures. Designed by anesthesiologists and engineers, this isolation system represents a realistic, cost-effective approach to rapidly build protection equipment for healthcare providers in direct contact with patients with infectious respiratory pathogens.

Key Benefits & Differentiators

  • Mitigate risk: reduces exposure of infectious aerosols, droplets and splashes from patients to care providers
  • Reduces waiting time between patients
  • Easy cleaning procedure
  • Can be used in ICUs or make-shift beds; portable
  • Easy to manufacture with commercially available parts

Phase of Development

FDA Emergency Use Authorization received on April 13, 2020.


Christopher Hogan, PhD
Professor and Director of Graduate Studies, Mechanical Engineering
External Link (cse.umn.edu)
Hai-Thien Phu, MD
Asish Abraham, MD
Kumar Belani, MD
Professor of Medicine, Department of Anesthesiology
External Link (med.umn.edu)
Thomas Dufresne
Yensil Park, PhD
Ian Marabella
Austin Andrews
Bernard Olson, PhD

Desired Partnerships

Licensee/Manufacturer to support FDA Emergency Use Authorization application.

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