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Complete and comprehensive surveillance of maternal mortality and maternal near miss should increase the consistency and accuracy of the data. Extremes of age, pre-existing medical conditions, language barriers, ethnicity, and socioeconomic status are recognized risk factors for maternal and obstetric complications. An important challenge to the identification of maternal near miss outcomes has historically been varying definitions between local, national, and international institutions. The majority of definitions may be classified as clinically based, organ system based, or management/intervention based. Organ-system dysfunction criteria are based on abnormalities detected by laboratory tests, such as platelet levels, and basic critical care monitoring. Complications from pre-existing medical conditions such as chronic heart disease are emerging as an important cause of maternal near miss, as improvements in medical care allow more women to live to reproductive age. Effective prevention policies are necessary to influence the long-term outcomes associated with maternal near miss.
To evaluate the use of routinely collected electronic health data in Medicare claims to identify surgical site infections (SSIs) following hip arthroplasty, knee arthroplasty, and vascular surgery.
Retrospective cohort study.
Four academic hospitals that perform prospective SSI surveillance.
We developed lists of International Classification of Diseases, Ninth Revision, and Current Procedural Terminology diagnosis and procedure codes to identify potential SSIs. We then screened for these codes in Medicare claims submitted by each hospital on patients older than 65 years of age who had undergone 1 of the study procedures during 2007. Each site reviewed medical records of patients identified by either claims codes or traditional infection control surveillance to confirm SSI using Centers for Disease Control and Prevention/ National Healthcare Safety Network criteria. We assessed the performance of both methods against all chart-confirmed SSIs identified by either method.
Claims-based surveillance detected 1.8–4.7-fold more SSIs than traditional surveillance, including detection of all previously identified cases. For hip and vascular surgery, there was a 5-fold and 1.6-fold increase in detection of deep and organ/space infections, respectively, with no increased detection of deep and organ/space infections following knee surgery. Use of claims to trigger chart review led to confirmation of SSI in 1 out of 3 charts for hip arthroplasty, 1 out of 5 charts for knee arthroplasty, and 1 out of 2 charts for vascular surgery.
Claims-based SSI surveillance markedly increased the number of SSIs detected following hip arthroplasty, knee arthroplasty, and vascular surgery. It deserves consideration as a more effective approach to target chart reviews for identifying SSIs.
Infect Control Hosp Epidemiol 2012;33(1):40-49
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