4 8 S U P P L E M E N T T O O U T P A T I E N T S U R G E R Y M A G A Z I N E A P R I L 2 0 1 6
sealed and cleared, one of the units releases a fine hydrogen peroxide solution
mist into the air, which then settles and disinfects the room's surfaces. The sec-
ond device in the room breaks down the hydrogen peroxide into oxygen and
water when the cycle is complete. The process takes roughly 1.5 hours, so
Johns Hopkins uses the system in high-risk patient rooms, though Dr. Perl says
it could also be used in the OR for terminal cleaning or after especially risky
cases (involving a patient with known Clostridium difficile, for example).
The hydrogen peroxide system can get in "all of the nooks and crannies," says
Dr. Perl. Her research has shown that patient rooms treated with the hydrogen
peroxide disinfection units had a 64% reduction in the number of patients who
later were contaminated with drug-resistant organisms (osmag.net/C3kGEa).
While the system Dr. Perl uses employs hydrogen peroxide vapor (HPV) tech-
nology, other systems on the market use aerosolized hydrogen peroxide (aHP) or
activated ionized hydrogen peroxide (AIHP). Systems with aHP technology use a
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+Clostridium difficile spores (C. diff) (ATCC# 43598) and Pseudomonas aeruginosa (Pseudomonas) (ATCC# 15442)
