nonspecific pattern and PRISM in PFT
- related: PFT and lung functions
- tags: #literature #pulmonology
- nonspecific: reduced FEV1 or FVC and normal FEV/FVC ratio and normal TLC
- reduced effort: not breathing all the way out. (flow volume curve concave towards end?)
- early restriction: FVC smaller but RV the same
- early obstruction: small airway disease, FVC smaller and RV increased. FEV/FVC has not started to fall yet.
- PRISM: preserved ratio impaired spirometry. This is when the TLC is not measured