Term
| What are abnormalities of oxygen exchange most commonly caused by? |
|
Definition
| mismatching of pulmonary ventilation and perfusion or by shunting |
|
|
Term
| obstruction shows what on a PFT? |
|
Definition
1) reduced FEV1
2) Reduced FEV1/FVC ratio |
|
|
Term
| Restriction shows what on a PFT? |
|
Definition
1) low FVC
2) High FEV1/FVC |
|
|
Term
| What is a possible early change in FEF for obstruction? |
|
Definition
FEF 20-75% of FVC
*FEF - Forced Expiratory Flow |
|
|
Term
| How is the severity of obstruction best assessed by? And what are the % indicating severe, moderate, and mild |
|
Definition
FEV1-best assessment
-<50% severe
-50-70% moderate
-higher levels with a reduced FEV/FVC - mild |
|
|
Term
| What excludes pulmonary embolism diagnosis? |
|
Definition
1) Normal D-dimer levels
2) equivocal scan |
|
|
Term
| What is the gold standard for the diagnosis of pulmonary thromboembolism? |
|
Definition
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