Chapter 88 Quality Assurance and Patient Safety in The Intensive Care Unit
4 List the uses to which severity of illness scoring systems are commonly applied
Stratification: Multiple scoring systems exist to stratify the severity or acuity of illness of critically ill patients. Examples of such classification systems are the:
These systems allow comparison of outcomes related to differing therapeutic approaches and attempt to match patients for severity of illness. The multiple scoring systems have not been compared in a prospective manner. Scoring systems for specific disease processes in critically ill patients exist, such as the risk, injury, failure, loss (complete loss of kidney function × 4 weeks) and end-stage kidney disease (complete loss of kidney function × 3 months) (RIFLE) criteria for kidney injury. Disease-specific scoring systems allow for standardized assessment enabling uniformity for research.
Efficiency of care delivery: Efficiency can be measured only if objective measures of resources are used together with models that define a population’s acuity of illness. It is important that the stratification of illness models have some validity in predicting outcome. These may be provided by the APACHE system and the Therapeutic Intervention Scoring System, among others.
Decision making in clinical management: Decision making may be aided by considering the information provided by scoring systems as these models allow physicians to stratify patients into cohorts. However, clinicians must be cognizant that scoring systems provide population illness overview, not specific patient prognosis. Individual patient data must be used when providing prognostic information for patients and their families.
Economics: Scoring of patients can assist in appropriate billing and reimbursement code application.