Sputum Booth & Aerosol Treatment Chamber Custom Air Controls is pleased to present the AeroMed ATC, a negative pressure booth for performing sputum inductions, aerosolized pentamidine treatments, and other cough inducing procedures. In the 1994 Guidelines for Preventing the Transmission of Mycobacterium tuberculosis in Health-Care Facilities, the CDC states, “All cough-inducing procedures performed on patients who may have infectious TB should be performed using local exhaust ventilation devices (e.g., booths or special enclosures) ..." The AeroMed ATC meets or exceeds the CDC recomendations for local exhaust ventilation booths. The patient sits in the booth during the procedure.  Air is drawn into the booth through a pre-filter on the top of the unit.  The air is then drawn past the patient and through a HEPA filter that is located under the seat. The HEPA filter removes airborne particulate contaminants at a removal efficiency of 99.97% on particles 0.3 microns in size.  This filtered air is exhausted from the back of the booth just above the floor.   The process of exhausting filtered air from the treatment chamber creates a negative pressure in the chamber relative to the surrounding area.  This difference in pressure prevents potentially contaminated air from leaving the booth and possibly infecting others.