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2005 National Healthcare Quality Report

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Hospital-acquired blood stream infections (BSIs)

Measure Source

Centers for Medicare & Medicaid Services (CMS), Medicare Patient Safety Monitoring System (MPSMS).


2.33 Percent of discharged patients with hospital-acquired blood stream infections, United States, 2002 and 2003.

Data Source

  1. CMS, MPSMS, inpatient medical records: for abstracted data related to the index hospital stay.
  2. CMS Medicare Administrative Data: used for 30-day post-procedure mortality.


All patients in MPSMS sample discharged from the hospital during the specified periods who did not have evidence of a BSI on admission.


Subset of the denominator with BSI acquired during the index hospital stay.


A hospital acquired BSI is determined by documentation of the following:

  1. At least 1 blood culture, drawn more than 2 days after admission, and positive for at least 1 of the following pathogens: Staphylococcus aureus, Escherichia coli, Coagulase negative Staphylococcus, Enterococcus species, Klebsiella species, Pseudomonas aeruginosa, beta-hemolytic Streptococcus, Enterobacter species, Viridans-group Streptococci, Candida and all other fungi, atypical mycobacteria, Acinetobacter, Citrobacter freundii, Proteus mirabilis, and Serratia marcescens
  2. A physician diagnosis of BSI. The detailed specifications for this criterion differ between 2002 and 2003 due to differences in the collected data elements

In order to attain greater consistency between 2002 and 2003 data, the analytic approach used to produce these tables differs from earlier years of the NHQR.

Adverse events associated with hip joint replacement due to degenerative conditions. Ventilator associated pneumonia (VAP) events.


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