Spirometry Severity Guidelines PDF
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Uploaded by RockStarSupernova3374
Tarlac State University
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Summary
This document provides guidelines for grading the severity of spirometry abnormalities, categorizing them into mild, moderate, moderately severe, severe, and very severe levels based on FEV₁, TLC, and FVC values. It differentiates between obstructive and restrictive disorders and presents the associated severity grading criteria.
Full Transcript
### Grading of Severity of Any Spirometry Abnormality Based on FEV₁ - After determining the pattern to be obstructive, restrictive, or mixed, FEV₁ is used to grade severity: | Severity Level | FEV₁ | |---|---| | Mild | > 70 (% pred.) | | Moderate | 60-69 | | Moderately Severe |...
### Grading of Severity of Any Spirometry Abnormality Based on FEV₁ - After determining the pattern to be obstructive, restrictive, or mixed, FEV₁ is used to grade severity: | Severity Level | FEV₁ | |---|---| | Mild | > 70 (% pred.) | | Moderate | 60-69 | | Moderately Severe | 50-59 | | Severe | 35-49 | | Very severe | <35 | ### Traditional Method of Grading the Severity of Obstructive and Restrictive Disorders - **Obstructive disorder (based on FEV₁) - Ratio < 0.7** | | FEV₁ | |---|---| | May be a physiologic variant | ≥100 (% pred.) | | Mild | 70-100 | | Moderate | 60-69 | | Moderately severe | 50-59 | | Severe | 35-49 | | Very severe | <35 | - **Restrictive disorder (based on TLC, preferred)** | | TLC | |---|---| | Mild | > 70 (% pred.) | | Moderate | 60-69 | | Severe | <60 | - **Restrictive disorder (based on FVC, in case no lung volume study is available)** | | FVC | |---|---| | Mild | > 70 (% pred.) | | Moderate | 60-69 | | Moderately severe | 50-59 | | Severe | 35-49 | | Very severe | <35 |
