Aspiration pneumonia laboratory tests: Difference between revisions
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==Overview== | ==Overview== | ||
Different laboratory tests might be used in patients with aspiration pneumonia. [[Sputum]] analysis including [[Gram staining|gram stain]] and culture must be done in patients with [[cough]]. [[Arterial blood gas|ABG]] may show acute [[hypoxemia]] and decreased mixed venous [[oxygen saturation]]. [[Complete blood count|CBC]] shows [[leukocytosis]] with left shift or [[leukopenia]], [[anemia]], or [[thrombocytopenia]]. | |||
==Laboratory Tests== | ==Laboratory Tests== | ||
===Routine Tests=== | ===Routine Tests=== | ||
Findings in routine blood tests are based on the severity of the disease and the cause, they can include the following:<ref name="SolomonWunderink2014">{{cite journal|last1=Solomon|first1=Caren G.|last2=Wunderink|first2=Richard G.|last3=Waterer|first3=Grant W.|title=Community-Acquired Pneumonia|journal=New England Journal of Medicine|volume=370|issue=6|year=2014|pages=543–551|issn=0028-4793|doi=10.1056/NEJMcp1214869}}</ref> | Findings in routine blood tests are based on the severity of the disease and the cause, they can include the following:<ref name="SolomonWunderink2014">{{cite journal|last1=Solomon|first1=Caren G.|last2=Wunderink|first2=Richard G.|last3=Waterer|first3=Grant W.|title=Community-Acquired Pneumonia|journal=New England Journal of Medicine|volume=370|issue=6|year=2014|pages=543–551|issn=0028-4793|doi=10.1056/NEJMcp1214869}}</ref> | ||
*[[Leukocytosis]] with left shift (in cases of bacterial pneumonia) | *[[Complete blood count|CBC]] shows: | ||
*[[Leukopenia]] (in cases of atypical pneumonia) | **[[Leukocytosis]] with left shift (in cases of bacterial pneumonia) | ||
*[[Eosinophilia]] (in cases of [[eosinophilic pneumonia]]) | **[[Leukopenia]] (in cases of atypical pneumonia) | ||
*[[Anemia]] | **[[Eosinophilia]] (in cases of [[eosinophilic pneumonia]]) | ||
**[[Anemia]] | |||
**[[Thrombocytopenia]] | |||
*[[Hyponatremia]] | *[[Hyponatremia]] | ||
*Elevated [[BUN]] | *Elevated [[BUN]] | ||
* | *[[ABG]] may show: | ||
*[[ | **Acute [[hypoxemia]] | ||
**Normal to low partial pressure of [[carbon dioxide]] | |||
**Decreased mixed venous oxygen saturation if a patient is in [[Sepsis|septic shock]] | |||
**Decreased [[Bicarbonate|HCO<sub>3</sub>]] | |||
**High [[Lactic acidosis|lactate level]] if a patient is in [[Sepsis|septic shock]] | |||
===Sputum Gram Stain and Culture=== | ===Sputum Gram Stain and Culture=== | ||
*Sputum samples should be obtained in all patients with productive [[cough]]. | *[[Sputum]] samples should be obtained in all patients with productive [[cough]]. | ||
*Gram | *[[Gram staining|Gram stain]] and culture should be performed to assess the causative agent and guide the therapy. | ||
==References== | ==References== | ||
{{Reflist|2}} | {{Reflist|2}} | ||
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[[Category:Medicine]] | |||
[[Category:Pulmonology]] | |||
[[Category:Up-To-Date]] | |||
[[Category:Emergency medicine]] | |||
Latest revision as of 20:29, 29 July 2020
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Aspiration pneumonia Microchapters | |
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Diagnosis | |
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Treatment | |
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Aspiration pneumonia laboratory tests On the Web | |
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American Roentgen Ray Society Images of Aspiration pneumonia laboratory tests | |
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Risk calculators and risk factors for Aspiration pneumonia laboratory tests | |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1];Associate Editor(s)-in-Chief: Sadaf Sharfaei M.D.[2]
Overview
Different laboratory tests might be used in patients with aspiration pneumonia. Sputum analysis including gram stain and culture must be done in patients with cough. ABG may show acute hypoxemia and decreased mixed venous oxygen saturation. CBC shows leukocytosis with left shift or leukopenia, anemia, or thrombocytopenia.
Laboratory Tests
Routine Tests
Findings in routine blood tests are based on the severity of the disease and the cause, they can include the following:[1]
- CBC shows:
- Leukocytosis with left shift (in cases of bacterial pneumonia)
- Leukopenia (in cases of atypical pneumonia)
- Eosinophilia (in cases of eosinophilic pneumonia)
- Anemia
- Thrombocytopenia
- Hyponatremia
- Elevated BUN
- ABG may show:
- Acute hypoxemia
- Normal to low partial pressure of carbon dioxide
- Decreased mixed venous oxygen saturation if a patient is in septic shock
- Decreased HCO3
- High lactate level if a patient is in septic shock
Sputum Gram Stain and Culture
- Sputum samples should be obtained in all patients with productive cough.
- Gram stain and culture should be performed to assess the causative agent and guide the therapy.
References
- ↑ Solomon, Caren G.; Wunderink, Richard G.; Waterer, Grant W. (2014). "Community-Acquired Pneumonia". New England Journal of Medicine. 370 (6): 543–551. doi:10.1056/NEJMcp1214869. ISSN 0028-4793.