Have you checked the math on your reports lately?
Once again my lab was questioned by a research study’s primary investigator and study coordinator about why our lung volume results came out significantly lower than another lab’s. In o…
Once again my lab was questioned by a research study’s primary investigator and study coordinator about why our lung volume…
28 Jun 2015 June 28, 2015 by Richard Johnston • Leave a comment
Using DL/VA (no, no, no, it’s really KCO!) to assess PFT results
Last week I was discussing the use of DL/VA to differentiate between the different causes of gas exchange defects with a physician. DL/VA is DLCO divided by the alveolar volume…
Last week I was discussing the use of DL/VA to differentiate between the different causes of gas exchange defects with…
21 Jun 2015 June 21, 2015 by Richard Johnston • Leave a comment
Selecting the best FEF25-75. Or not.
Oddly enough, I recently got a couple emails on the same day about the FEF25-75 and ended up corresponding for a while with the authors. FEF25-75 is a subject that…
Oddly enough, I recently got a couple emails on the same day about the FEF25-75 and ended up corresponding for…
14 Jun 2015 June 14, 2015 by Richard Johnston • Leave a comment
Hyperoxic CPETs
In patients with lung disease the use of supplemental oxygen during exercise increases oxygen consumption, endurance time and maximum workload, and decreases the sensation of dyspnea without increa…
In patients with lung disease the use of supplemental oxygen during exercise increases oxygen consumption, endurance time and maximum workload,…
9 Jun 2015 June 9, 2015 by Richard Johnston • Leave a comment
Opto-Electronic Plethysmography (OEP)
Although we routinely use mouthpieces, noseclips and occasionally masks for our testing, all of these alter respiration in one way or another. Opto-electronic plethysmography (OEP) is a completely …
Although we routinely use mouthpieces, noseclips and occasionally masks for our testing, all of these alter respiration in one way…
2 Jun 2015 June 2, 2015 by Richard Johnston • Leave a comment
Treadmill protocols
Since I started performing exercise tests I’ve used both treadmills and bicycle ergometers. There are a several reasons that make ergometers somewhat better for exercise testing than treadmil…
Since I started performing exercise tests I’ve used both treadmills and bicycle ergometers. There are a several reasons that make…
24 May 2015 May 24, 2015 by Richard Johnston • Leave a comment
Static reports, dynamic world
Reports are how patient test results are distributed. Paper versions have become less common because reports are now stored electronically in hospital information systems. Even if the way in which…
Reports are how patient test results are distributed. Paper versions have become less common because reports are now stored electronically…
17 May 2015 May 17, 2015 by Richard Johnston • Leave a comment
Transgender PFTs
I was reviewing PFT reports today and noticed that a patient appeared to have had the wrong gender entered in their demographic information. Specifically, the patient had an unambiguously masculine…
I was reviewing PFT reports today and noticed that a patient appeared to have had the wrong gender entered in…
10 May 2015 May 10, 2015 by Richard Johnston • Leave a comment
How does a CPET show a Cardiac Limitation?
Recently a patient was referred to my lab for a CPET by his oncologist. The patient had been complaining of excessive shortness of breath particularly when climbing only a few…
Recently a patient was referred to my lab for a CPET by his oncologist. The patient had been complaining of…
3 May 2015 May 3, 2015 by Richard Johnston • Leave a comment
Welcome to Lung Function
The home of respiratory physiology and diagnostics. The new home for the pftblog forum by Richard Johnston.
Have a question?
Our forum is a welcoming community where you can ask questions around testing, quality improvement and network with colleagues in your region. Start a conversation <a href="https://www.lungfunction.co.uk/forum/" target="_blank">here</a>.