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Related Experiment Videos

Difficulty in predicting bacteremia in elderly emergency patients.

P B Fontanarosa1, F J Kaeberlein, L W Gerson

  • 1Department of Emergency Medicine, Northeastern Ohio Universities College of Medicine, Rootstown.

Annals of Emergency Medicine
|July 1, 1992
PubMed
Summary

Bacteremia in elderly patients is difficult to predict using clinical signs alone. Altered mental status, vomiting, and elevated WBC band forms are key indicators, but clinical assessment remains unreliable for diagnosing bloodstream infections in older adults.

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Area of Science:

  • Geriatric Medicine
  • Infectious Diseases
  • Emergency Medicine

Background:

  • Bacteremia is a serious condition in elderly patients, often presenting with non-specific symptoms.
  • Early identification of bacteremia is crucial for timely treatment and improved patient outcomes.

Purpose of the Study:

  • To characterize the clinical presentation of bacteremia in elderly patients.
  • To identify clinical factors that predict the presence of bacteremia in this population.

Main Methods:

  • Retrospective review of emergency department (ED) and hospital records for 750 elderly patients (65-99 years).
  • Comparison of patients with positive blood cultures (n=79) versus sterile blood cultures (n=136).
  • Logistic regression analysis to identify independent predictors of bacteremia.

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Main Results:

  • The prevalence of bacteremia was 10.6%, with Escherichia coli being the most common pathogen.
  • Independent predictors of bacteremia included altered mental status, vomiting, and WBC band forms >6%.
  • The model incorporating these factors showed high sensitivity (0.85) but low specificity (0.46) and positive predictive value (0.16).

Conclusions:

  • Elderly patients often lack specific clinical features indicative of bloodstream infections.
  • Clinical indicators alone are unreliable for predicting bacteremia in the geriatric ED population.
  • Further diagnostic tools are needed for accurate bacteremia detection in older adults.