Poor quality test results. When do you accept them?
The ATS/ERS have published standards for most Pulmonary Function tests. These standards include the criteria that are used for assessing test quality. What these standards don’t address howev…
The ATS/ERS have published standards for most Pulmonary Function tests. These standards include the criteria that are used for assessing…
24 Oct 2012 October 24, 2012 by Richard Johnston • Leave a comment
What do you say to your patients and how do you say it?
Pulmonary Function testing is almost unique among medical tests in that it requires maximum effort and cooperation from the patient for quality results. The better you are able to communicate…
Pulmonary Function testing is almost unique among medical tests in that it requires maximum effort and cooperation from the patient…
22 Oct 2012 October 22, 2012 by Richard Johnston • Leave a comment
DL/VA is really K in disguise
One misconception about DLCO results that I’ve heard over and over is that DLCO/VA is DLCO “adjusted” for lung volume and that using it is a way of “normalizing” DLCO…
One misconception about DLCO results that I’ve heard over and over is that DLCO/VA is DLCO “adjusted” for lung volume…
18 Oct 2012 October 18, 2012 by Richard Johnston • Leave a comment
Evaluating spirometry predicted equations for the elderly
I’ve mentioned previously that the PFT Lab I am associated with recently went through a major hardware and software update. As part of this update we decided to change spirometry…
I’ve mentioned previously that the PFT Lab I am associated with recently went through a major hardware and software update.…
12 Oct 2012 October 12, 2012 by Richard Johnston • Leave a comment
Is the MVV clinically relevant?
The respiratory system is in part a mechanical pump or bellows. The Maximum Voluntary Ventilation test (MVV, aka Maximum Breathing Capacity, MBC) is intended to measure the maximum ventilation a…
The respiratory system is in part a mechanical pump or bellows. The Maximum Voluntary Ventilation test (MVV, aka Maximum Breathing…
10 Oct 2012 October 10, 2012 by Richard Johnston • Leave a comment
The FIVC can reveal expiratory obstruction
This spirometry report came across my desk today.
This spirometry report came across my desk today.
6 Oct 2012 October 6, 2012 by Richard Johnston • Leave a comment
Supine spirometry
If you are not already performing supine spirometry you should consider adding it to your arsenal of tests. Other than an exam table no new equipment is needed to perform…
If you are not already performing supine spirometry you should consider adding it to your arsenal of tests. Other than…
4 Oct 2012 October 4, 2012 by Richard Johnston • Leave a comment
Lung volume measurements and software smarts.
Many years ago I used to think that lung volume measurements were the easy part of PFTs. As time has gone on I’ve seen that getting accurate lung volume measurements…
Many years ago I used to think that lung volume measurements were the easy part of PFTs. As time has…
3 Oct 2012 October 3, 2012 by Richard Johnston • Leave a comment
Why haven’t computerized interpretations gotten any better?
Almost all pulmonary function test systems seem to come with a module that can perform a computerized interpretation of PFT results. Their accuracy has been studied occasionally, often by the…
Almost all pulmonary function test systems seem to come with a module that can perform a computerized interpretation of PFT…
25 Sep 2012 September 25, 2012 by Richard Johnston • Leave a comment
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