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Hyponatremia in community-acquired pneumonia
Vinay Nair1, Michael S Niederman, Naveed Masani
1Division of Nephrology, Winthrop-University Hospital, Mineola, NY, USA.
American Journal of Nephrology
|March 16, 2007
Summary
Hyponatremia is a common complication in community-acquired pneumonia (CAP), often present at admission. This condition is linked to more severe illness, higher mortality, and longer hospital stays, highlighting the need for careful electrolyte monitoring.
Area of Science:
- Nephrology
- Pulmonology
- Internal Medicine
Background:
- Community-acquired pneumonia (CAP) frequently leads to hospitalization.
- CAP can cause various renal and electrolyte disturbances.
- Hyponatremia is a notable electrolyte complication in CAP patients.
Purpose of the Study:
- To determine the incidence of hyponatremia in patients with CAP.
- To identify risk factors associated with hyponatremia in CAP.
- To analyze the clinical outcomes related to hyponatremia in CAP.
Main Methods:
- Retrospective review of 342 patients from the Community-Acquired Pneumonia Standardized Order Set study.
- Analysis of patient records to identify hyponatremia at admission and during hospitalization.
- Comparison of clinical characteristics and outcomes between patients with and without hyponatremia.
Main Results:
- Hyponatremia was present in 27.9% of patients at admission, usually mild.
- Patients with hyponatremia showed higher heart rate, WBC count, and pneumonia severity.
- Hyponatremia at admission correlated with increased risk of death and longer hospital stays.
- Hyponatremia developed in 10.5% during hospitalization, often mild and linked to end-stage renal disease or non-isotonic IV fluids.
Conclusions:
- Hyponatremia is a frequent complication of CAP, present upon admission.
- Admission hyponatremia indicates more severe illness, increased mortality, and prolonged hospitalization.
- Hospital-acquired hyponatremia is less common, potentially iatrogenic, and may be reduced by using isotonic saline.
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