Navigation Links
Face Masks for Patients May Leak, Spread Germs
Date:10/9/2009

Health-care workers should take precautions, especially given H1N1 pandemic, experts say

FRIDAY, Oct. 9 (HealthDay News) -- Health-care workers, take note: Hospital patients using positive pressure ventilation masks to help them breathe may be spreading germs every time they exhale, a new study finds.

The masks can leak exhaled air up to one meter from patients receiving treatments, spreading contagious respiratory illness within a hospital, researchers say. This may be of particular concern if the patient has the highly contagious H1N1 swine flu.

"Health-care workers should take adequate respiratory precautions -- wearing N95 masks and personal protective equipment -- when providing noninvasive ventilatory support to patients with pneumonia of unknown etiology complicated by respiratory failure, including patients with pandemic H1N1 influenza," said lead researcher Dr. David S. Hui, from the department of medicine and therapeutics at the Chinese University of Hong Kong.

The report is published in the October issue of Chest.

For the study, Hui's team measured air leakage from two commonly used positive pressure ventilation masks, the Respironics ComfortFull 2 mask and the Image3 mask. The test was done on a patient simulator, which mimicked a patient with lung injury.

These masks fit over the patient's nose and mouth and provide a continuous flow of air at a steady pressure to help the patient breathe. They are used for patients with heart failure, chronic obstructive pulmonary disease (COPD), asthma and sleep apnea in addition to pneumonia.

With both models and using negative pressure, the researchers found substantial exposure to exhaled air occurs within one meter of patients receiving non-invasive ventilation in an isolation room. But far more leakage and room contamination occurred from the Image 3 mask, especially at higher pressures, Hui said.

Hui said the study results argue for avoiding the use of high pressure, which will lead to more exhaled air dispersion, and "exhalation devices, which will lead to widespread exhaled air dispersion."

Dr. Roland Schein, professor of medicine in the division of pulmonary, critical care and sleep medicine at the University of Miami Leonard M. Miller School of Medicine, said it is well-known that these masks can spread contagious germs.

"The concern has always been with open systems and highly infectious pathogens. People within a certain range are at risk and need to take precautions to reduce those risks," Schein said.

This study has defined how far those germs can spread, he added.

Health-care workers caring for patients using these masks should take precautions, including face masks and protective clothing, Schein said. This is especially important now with "the concerns about H1N1 and other respiratory pathogens," he said.

More information

For more information on respiratory protection, visit the U.S. Occupational Health and Safety Administration.



SOURCES: David S. Hui, M.D., department of medicine and therapeutics, the Chinese University of Hong Kong; Roland Schein, M.D., professor, division of pulmonary, critical care and sleep medicine, University of Miami Leonard M. Miller School of Medicine; October 2009 Chest


'/>"/>
Copyright©2009 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Surgical masks vs. N95 respirators for preventing influenza among health care workers
2. Surgical Masks Help Ward Off Flu, Maybe
3. Nurses File Cal-OSHA Complaint After Hospital Refuses to Supply Swine Flu Masks for Units with Infected Patients
4. Viroblock SA Reports a 99% Boost of Efficacy of Facemasks Against H5N1
5. Silver Shield Masks Assist in the Fight Against Flu
6. Will Face Masks Protect Against Swine Flu?
7. ReStockIt.com Greatly Cutting Prices on Hand Sanitizers, Masks to Help Combat Swine Flu Epidemic
8. Study unmasks how ovarian tumors evade immune system
9. Handwashing, Masks Beat Drugs at Fighting Flu
10. Genomic Health Announces Data Confirming Manual Microdissection of Biopsy Cavities Is Essential for Accurate Recurrence Risk Assessment in Early-Stage Breast Cancer Patients
11. Patients who received donated pacemakers survive without complications
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/25/2016)... ... June 25, 2016 , ... Experts from the American Institutes ... Research Meeting June 26-28, 2016, at the Hynes Convention Center in Boston. , ... advance care planning, healthcare costs and patient and family engagement. , AIR researchers ...
(Date:6/25/2016)... ... 2016 , ... "With 30 hand-drawn hand gesture animations, FCPX users can easily ... of Pixel Film Studios. , ProHand Cartoon’s package transforms over 1,300 hand-drawn pictures ... . Simply select a ProHand generator and drag it above media or text in ...
(Date:6/25/2016)... ... June 25, 2016 , ... ... non-athletes recover from injury. Recently, he has implemented orthobiologic procedures as a method ... —Johnson is one of the first doctors to perform the treatment. Orthobiologics are ...
(Date:6/24/2016)... ... June 24, 2016 , ... A recent article published June 14 ... The article goes on to state that individuals are now more comfortable seeking to ... operations such as calf and cheek reduction. The Los Angeles area medical group, Beverly ...
(Date:6/24/2016)... ... 2016 , ... Marcy was in a crisis. Her son James, eight, was out of control. ... and physically. , “When something upset him, he couldn’t control his emotions,” remembers Marcy. ... rocks at my other children and say he was going to kill them. If ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... ANGELES , June 23, 2016 ... CAPR ), a biotechnology company focused ... therapeutics, today announced that patient enrollment in its ... in Duchenne) has exceeded 50% of its 24-patient ... enrollment in the third quarter of 2016, and ...
(Date:6/23/2016)... PARK RIDGE, Ill. and INDIANAPOLIS ... caliber of students receiving a Lilly Diabetes Tomorrow,s Leaders ... hands. The 2016 scholarship winners, announced today online at ... refused to let type 1 diabetes stand in the ... Lilly Diabetes has supported the Foundation,s scholarship program since ...
(Date:6/23/2016)... Pa. , June 23, 2016 The ... in an outpatient dialysis facility.  Treatments are usually 3 ... 6 hours per visit, including travel time, equipment preparation ... a patient, but especially grueling for patients who are ... of a skilled nursing and rehabilitation centers for some ...
Breaking Medicine Technology: