Difference between revisions of "PULMONARY FUNCTION TEST-ALGORITHM"
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==Reference(s)== | ==Reference(s)== | ||
Wilkinson, I. (2017). Oxford handbook of clinical medicine. Oxford: Oxford University Press. | Wilkinson, I., Furmedge, D. and Sinharay, R. (2017). Oxford handbook of clinical medicine. Oxford: Oxford University Press. [https://amzn.to/3YHrI6K Get it on Amazon.] | ||
<br/>Feather, A., Randall, D. and Waterhouse, M. (2020). Kumar And Clark’s Clinical Medicine. 10th ed. S.L.: Elsevier Health Sciences. [https://amzn.to/3k7WSW0 Get it on Amazon.] | |||
<br/>Hannaman, R. A., Bullock, L., Hatchell, C. A., & Yoffe, M. (2016). Internal medicine review core curriculum, 2017-2018. CO Springs, CO: MedStudy. | <br/>Hannaman, R. A., Bullock, L., Hatchell, C. A., & Yoffe, M. (2016). Internal medicine review core curriculum, 2017-2018. CO Springs, CO: MedStudy. | ||
<br/>Therapeutic Guidelines. Melbourne: Therapeutic Guidelines Limited. https://www.tg.org.au [Accessed 2021]. | <br/>Therapeutic Guidelines. Melbourne: Therapeutic Guidelines Limited. https://www.tg.org.au [Accessed 2021]. |
Latest revision as of 20:03, 13 March 2023
SUMMARY
1. Anything < 80% of normal is an abnormal finding
2. Look for restrictive disease: TLC < 80% or (if TLC is unknown) FEV1/FVC ≥ 80% & FVC < 80%
3. If restrictive: if the decrease in DLCO is proportional to the decrease in TLC, then it's extra-thoracic; if the decrease in DLCO is disproportionately low compared to the decrease in TLC, then it's intra-thoracic
4. Look for obstructive disease: defined by a disproportionately low FEV1, both FEV1 and FEV1/FVC < 70%
5. If obstructive: if TLC is high, no response to β2-agonist & DLCO is low then it's emphysema; if DLCO is normal and significant response to β2-agonist then it's asthma
6. If both restrictive & obstructive pictures are present, then it's a combination (such as in patients with concomitant asthma & obesity or asthma & sarcoidosis/Langerhans’s histiocytosis)
Reference(s)
Wilkinson, I., Furmedge, D. and Sinharay, R. (2017). Oxford handbook of clinical medicine. Oxford: Oxford University Press. Get it on Amazon.
Feather, A., Randall, D. and Waterhouse, M. (2020). Kumar And Clark’s Clinical Medicine. 10th ed. S.L.: Elsevier Health Sciences. Get it on Amazon.
Hannaman, R. A., Bullock, L., Hatchell, C. A., & Yoffe, M. (2016). Internal medicine review core curriculum, 2017-2018. CO Springs, CO: MedStudy.
Therapeutic Guidelines. Melbourne: Therapeutic Guidelines Limited. https://www.tg.org.au [Accessed 2021].