Protecting immune suppressed patients from construction generated airborne opportunisticinfectious agents is essential during their hospitalization. During modernization of thehospitals 32-bed bone marrow transplant unit (BMTU), an empty intensive care unit wasretrofitted to BMT ventilation criteria. Filtration, pressurization and room air exchangecriteria were required at 12/h. A condensate particle counter and a digitalpressure gauge were used to assess these criteria.
The ventilation system of a hospital operating theatre is designed to provide a comfortable andhealthy environment for the patient and the surgical team. A healthy environment can beachieved by minimizing the risk of contamination through an appropriate filtration and airdistribution scheme. The design and construction of operating theatres in Hong Kong,including the upgrading of the older ones, are based on the UK Health Building Notes andHealth Technical Memoranda.
The cabin of a commercial aircraft is a high density environment in which occupants are potentially at risk of airborne transmission of Mycobacterium tuberculosis. Trans-continental and trans-oceanic flights are routinely undertaken with hundreds of passengers. During these long flights there is an increased duration of potential exposure to airborne contaminants and bioeffluents. This paper determines a "worst case" risk of tuberculosis infection for the passengers and flight attendants based upon typical design and ventilation parameters of a commercial aircraft.