This study compared the simulated workplace protection factors (SWPFs) between NIOSH-approved N95 respirators and P100 respirators, including two models of filtering facepiece respirator (FFR) and two models of elastomeric half-mask respirator (EHR), against sodium chloride particles (NaCl) in a range of 10 to 400 nm. Twenty-five human test subjects performed modified OSHA fit test exercises in...

There are limited data on the use of masks and respirators to reduce transmission of influenza. A systematic review was undertaken to help inform pandemic influenza guidance in the United Kingdom. The initial review was performed in November 2009 and updated in June 2010 and January 2011. Inclusion criteria included randomised controlled trials and quasi-experimental and observational studies o...

We report the case of a 7 year old girl who developed central hypoventilation following pertussis and who was treated by negative pressure ventilation using a new portable tank respirator. We believe this is the first reported case of central hypoventilation following pertussis successfully treated by intermittent negative pressure ventilation.

This study compared the simulated workplace protection factors (SWPFs) between NIOSH-approved N95 respirators and P100 respirators, including two models of filtering facepiece respirator (FFR) and two models of elastomeric halfmask respirator (EHR),against sodium chloride particles (NaCl) in a range of 10 to 400 nm. Twenty-five human test subjects performed modified OSHA fit test exercises in a...

It is of interest that the history of body-enclosing chambers for the treatment of respiratory diseases goes back to at least 1885, when H. F. Williams, an American physician, aided by an engineer friend, used this principle in administering aerosol therapy to patients with pulmonary infections.’ A year later Williams reported that cyclic changes in pressure around the body could be used to pro...