Odd results from a leak during a DLCO test
One of our testing systems has been leaking during the breath-holding period of DLCO tests. This has been an on-again, off-again problem caused by a leaking balloon valve. The odd…
One of our testing systems has been leaking during the breath-holding period of DLCO tests. This has been an on-again,…
15 May 2013 May 15, 2013 by Richard Johnston • Leave a comment
Should PFT Lab staff be credentialed?
The issue of PFT staff licensure or certification has recently been a topic of discussion on the LinkedIn Pulmonary Function Studies group and the Diagnostics section of the AARConnect discussion…
The issue of PFT staff licensure or certification has recently been a topic of discussion on the LinkedIn Pulmonary Function…
10 May 2013 May 10, 2013 by Richard Johnston • Leave a comment
FEV6
FEV6 (the volume of air forcefully exhaled after 6 seconds) has been proposed as a replacement or surrogate for FVC in spirometry. Given that using FEV6 would simplify and speed…
FEV6 (the volume of air forcefully exhaled after 6 seconds) has been proposed as a replacement or surrogate for FVC…
7 May 2013 May 7, 2013 by Richard Johnston • Leave a comment
QC and the DLCO Simulator
I’ll start by saying that I am not associated with Hans Rudolph Incorporated in any way. I just think they make a bunch of good products, and more specifically in…
I’ll start by saying that I am not associated with Hans Rudolph Incorporated in any way. I just think they…
10 Apr 2013 April 10, 2013 by Richard Johnston • Leave a comment
Chronotropic Index and O2 Pulse
One of the things that I enjoy most about reviewing cardiopulmonary exercise tests is that I always have to reach back into the basics of physiology in order to get…
One of the things that I enjoy most about reviewing cardiopulmonary exercise tests is that I always have to reach…
24 Mar 2013 March 24, 2013 by Richard Johnston • Leave a comment
DLCO Dilemma
For the last several months I’ve noticed what appears to be a greater than normal number of patient test results where the VA volume from the DLCO test was greater…
For the last several months I’ve noticed what appears to be a greater than normal number of patient test results…
23 Mar 2013 March 23, 2013 by Richard Johnston • Leave a comment
Equipment is not detecting glottal closure and cough
In my last blog on personal spirometers I mentioned that one of the university projects has developed software that assesses spirometry results for ATS-ERS standard including cough, glottal closure…
In my last blog on personal spirometers I mentioned that one of the university projects has developed software that assesses…
16 Mar 2013 March 16, 2013 by Richard Johnston • Leave a comment
Personal spirometers
Peak flow meters, both mechanical and electronic, have been available to asthma patients for years. A number of inexpensive spirometers that meet ATS-ERS standards are now available for little as…
Peak flow meters, both mechanical and electronic, have been available to asthma patients for years. A number of inexpensive spirometers…
4 Mar 2013 March 4, 2013 by Richard Johnston • Leave a comment
Is it time to scuttle the FEF25%-75%?
When we went through our hardware and software upgrade last August, one of the changes we made was to stop reporting the FEF25%-75% (AKA MMEF, MMFR, MMF). The pulmonary physicians…
When we went through our hardware and software upgrade last August, one of the changes we made was to stop…
25 Feb 2013 February 25, 2013 by Richard Johnston • Leave a comment
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