Navigation Links
Pilot study reinforces use of portable anteroom HEPA filtration

Washington, DC, May 6, 2008 Amidst an increase in new tuberculosis cases, researchers have begun investigating the effectiveness of new operating room filtration systems designed to protect staff and patients. According to pilot study findings published in the May issue of the American Journal of Infection Control, a supplemental portable anteroom high-efficiency particulate air (PAS- HEPA) filter unit placed outside operating room suites may prevent secondary transmission of airborne microorganisms like Mycobacterium tuberculosis (M. tuberculosis).

The rate of decline in newly reported tuberculosis cases in the U.S. has slowed, said lead study investigator Russell N. Olmsted, MPH, CIC, epidemiologist from Saint Joseph Mercy Hospital in Ann Arbor, MI. This, coupled with the worldwide emergence of even more drug-resistant tuberculosis, reinforces the need for renewed vigilance and surveillance from healthcare professionals. In particular, study results reinforce the need for measures to optimize air particle removal.

Olmsted and colleagues compared the efficiency of freestanding HEPA filtration units to a new portable anteroom system (PAS)-HEPA combination unit in removing harmful airborne infectious pathogens. Freestanding HEPA units were evaluated in the operating room, while the PAS-HEPA unit was placed outside over the main operating room door. Both smoke plume and non-infectious particles similar in size to M. tuberculosis were used to mimic movement of airborne pathogens within highly pressured environments.

We observed interruption of normal patterns of airflow with freestanding HEPA units placed inside the operating room, said Olmsted, adding that instead of being captured by the air-filtration system, smoke plume traveled upward from the operating room table and into the breathing zone of personnel who might be present during a typical surgical procedure.

This suggests an increased potential for occupational exposure to airborne microorganisms as well as an unwanted introduction of contaminants into the patients open surgical site, he explained.

In contrast, deployment of the PAS-HEPA combination unit pulled the smoke downward, away from the operating room table and toward the floor and main door. The second phase of the study (which involved simulated microscopic particles) mirrored these observations; within 20 minutes, over 94% of submicron particles were cleared from the operating room.

The results of Mr. Olmsteds study reinforce the Centers for Disease Control and Prevention (CDC) 2003 guidelines for environmental infection control as well as 2005 guidelines for preventing the transmission of M. tuberculosis in healthcare settings, said Janet E. Frain, RN, CIC, CPHQ, CPHRM, APIC 2008 President and Director, Integrated Services, Sutter Medical Center in Sacramento, CA. These findings should be considered for integration into an overall infection prevention and control program to help ensure both patient and healthcare personnel safety.

Olmsted emphasized that infection prevention professionals should review both of these guidelines along with the compendium of corrections that accompanies the 2005 tuberculosis recommendations, paying particular attention to information regarding the use of portable air filtration units during surgical procedures. The guidelines can be found on the CDC and APIC websites, at and

The investigators concluded that supplemental PAS-HEPA filtration appears to be an effective strategy for containing potential airborne infections. It also offers clinicians the option of deployment at any point in a daily schedule of surgeries and can be moved with the patient to a private recovery room to avoid postoperative transmission, Olmsted said. Nevertheless, he suggested that in order to validate these findings, additional data derived from other facilities are needed. He also cautioned that the use of surrogates to mimic M. tuberculosis made it impossible to truly predict pathogen transmission behavior.


Contact: Liz Garman
Association for Professionals in Infection Control

Related medicine news :

1. Phyhealth Signs Agreement with Advantica EyeCare to Provide Vision Services for Pilot HMO
2. Lake Hospital System Selected as Pilot Site for Health Information Literacy Research Project
3. NovoCure presents results from breast cancer pilot study
4. Researchers pilot new electronic system for infectious illness
5. VA to Pilot Innovative Remote Benefits Delivery Program
6. Phyhealth Concludes $1.5 Million Financing for Launch of Its Pilot Community-Based HMO
7. GHI and HIP Launch Pilot Medical Home Network Project with Support from Commonwealth Fund
8. Rockefeller Universitys Center for Clinical and Translational Science funds pilot studies
9. Pilot error declines as factor in airline mishaps
10. GDAHC Save Lives Save Dollars Initiative Launches Pilot Program for Diabetes Care Management
11. Internet2 Congratulates FCC Rural Health Care Pilot Program Grant Awardees
Post Your Comments:
(Date:10/13/2015)... ... October 13, 2015 , ... ... development solutions for drugs, biologics, consumer health and animal health products, today announced ... will lead a new, dedicated global team of drug development and technology experts. ...
(Date:10/12/2015)... Nashville, TN (PRWEB) , ... October 13, 2015 ... ... the recipients of its biannual Heroes in Recovery Awards at Foundations Recovery Network’s ... Foundations Recovery Network presented the one-of-a-kind awards to Noah Levine and Dean Dauphinais ...
(Date:10/12/2015)... ... October 13, 2015 , ... North American Tool Corporation has been named ... National Meeting in Rosemont, IL on October 4th. , Each year, ... excellence that customers have come to expect from members of IBC’s marketing group. ...
(Date:10/12/2015)... ... ... of the “Check-In and Win a Vacation to Hawaii” Facebook contest at Gold’s Gym ... didn’t believe I could win a free vacation simply by checking in on Facebook every ... and invest in my own health – and now I’m going to Hawaii.” , Thanks ...
(Date:10/12/2015)... ... , ... Amerec , a leader in the steam and sauna industry, ... be displaying custom sauna and steam room solutions at the ISPA Conference & Expo ... customers, SpaEquip is recognized for their ability to assist in the design and implementation ...
Breaking Medicine News(10 mins):
(Date:10/12/2015)... Minn. , Oct. 12, 2015 Device ... a need to help integrate these devices into existing ... of ergonomic healthcare mounting and mobility solutions, has launched ... lightest cart yet, for a wide array of laptops ... Cart SV10 was developed exclusively for Microsoft Surface and ...
(Date:10/12/2015)... , October 12, 2015 ... Forecast to grow at 7.2% CAGR, microscopy ... by rising focus on nanotechnology, technological advancements, ... research report available with ... . --> Complete report ...
(Date:10/12/2015)... England , Oct. 12, 2015 Indivior PLC ... the District of Delaware granted the ... Teva Pharmaceuticals, Abbreviated New Drug Application (ANDA) No. 205299 to ... SUBOXONE® (buprenorphine and naloxone) Sublingual Film (CIII) in ... --> Since August 2013, Indivior has received Paragraph ...
Breaking Medicine Technology: