Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Hamman-Rich syndrome laboratory findings
Introduction
Overview
Overview
There are no diagnostic laboratory findings associated with acute interstitial pneumonitis. However, routine laboratory tests may help in identifying alternative diagnoses rather than making a diagnosis of acute interstitial pneumonitis, include abnormal arterial blood gases, physiologic lung testing, complete blood count, and sputum examination, and microbiologic tests.
Laboratory findings
Laboratory findings
Laboratory findings consistent with the diagnosis of acute interstitial pneumonitis include:
- Abnormal ABG
- May indicate hypoxia, hypercapnia, and respiratory acidosis.
- Spirometry[1]
- May indicate a restrictive pulmonary disease.
- A FEV1/FVC ratio > 80% indicates restrictive disease.
- Peak flow assessment
- May be below normal range which is 100 liters/minute for men, and 80 liters/minute for women.
- CBC
- May indicate anemia, neutrophilia, elevated ESR, elevated CRP, and elevated immunoglobulin.
- Microbiologic tests:
- Influenza testing using nasopharyngeal aspirates
- Serologic tests for atypical pneumonias (eg, Coccidioides, Chlamydia, coronavirus)
- Urinary antigen tests for Streptococcus pneumoniae and Legionella
- Serologic tests for detection of autoimmune diseases
- Abnormal sputum analysis
- May contain bacteria, such as mycobacterium tuberculosis or inorganic particles, such as asbestos bodies or organic particles.
- Pneumocystis jirovecii immunofluorescence
References
References
- ↑ Chetta A, Marangio E, Olivieri D (2004). “Pulmonary function testing in interstitial lung diseases”. Respiration. 71 (3): 209–13. doi:10.1159/000077416. PMID 15133338.
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Chandrakala Yannam, MD [2]