06-07-2011 09:17 AM
At least twice a year, the independent group that certifies the hoods and compounding area also does a pressure monitoring between the buffer area and the ante room. Does that satisfy USP 797, or do continuous pressure guages need to be installed? Thanks again!
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06-08-2011 02:02 PM
It is good that your certifier is checking the pressures twice a year but the chapter requires that the pressure differential be observed and recorded/documented on a daily basis. You can install an inexpensive magnehelic gauge (about $200). I would install one between the buffer and ante areas and ante area to the general pharmacy area. You want to see a "cascading pressure" from the buffer area-->ante area-->general pharmacy.