HFS: HEPA Filter Scrubber 99.97% HEPA filter and integral fan. Units have different capacities generally 5-600 cfm in ORs, larger units in anteroom - up to 1200 cfm
Connect HFU discharge to existing low return grille
Substerile room with blanket warmer. Seal off low return grille
HFS ~600 cfm
Remove this door so that substerile room is open to the anteroom Seal off low return grille
OR 16 1500 cfm SA
Existing room pressure monitor - use to verify OR pressure is positive relative to anteroom
Scrub Sinks
OR 15 1350 cfm SA
HFS ~600 cfm Temporary barrier wall with 54" door (clearance of 42" door will not. Angle walls as needed to clear doors, wall- or ceiling-mounted devices. Verify fire protection sprinkler coverage. Seal wall all around to existing construction. Walls shown angled here in order to avoid other doors in corridor - can be straight or angled, as needed
Temporary duct connection from HFS, blowing through temp partition into sterile corridor
Arrows indicate intended airflow direction Anteroom - Negative Pressure: orange area is considered contaminated during any procedure with infectious patient in either OR.
Seal off existing diffusers & grilles
Adjust airflow of two HFS to achieve negative pressure in anteroom, relative to sterile corridor
Temporary Modifications to prepare two-room surgery suite for airborne infectious isolation 22 March 2020