c790 Nursing Informatics (WGU) Technical Infrastructure Questions and Answers Latest [100% correct answers]

clinical data repository (CDR) - Answer-is the storage component for all instance data of patient clinical records central versus distributed storage encounter-based versus longitudinal-based storage central storage model - Answer-a single repository is used to store all (or most) clinical data and is used as the primary source for reviewing data. improves the ability of a single application to display data from multiple original sources and locations and provides the capability to perform clinical decision support (CDS) more efficiently across multiple data types usually requires that data collected from secondary systems be transformed (mapped) to a common storage model and terminology before being stored in the repository. distributed storage model - Answer-each data collection application stores its information in its own repository and data are federated through a real-time data access methodology results review application may have to access separate repositories for lab, microbiology, radiology, etc., in order to provide a composite view of information. provides some reliability to the EHR because, for example, if one repository goes down, the user may still be able to access information from the other repositories. It also allows the most efficient storage and access for particular data types and lessens the complexity of having to map data from one system to another. disadvantages: can limit performance, many single points of failure, makes integrated tasks such as CDS much more difficult.Encounter-based (or episodic) storage - Answer-older, hospital based EHRs data are collected according to the current patient encounter and then are usually purged or archived from the repository when the patient is discharged very efficient in terms of system performance for supporting the current encounter because the data in the repository are always the most current and reflect only what has been collected as relevant to the present circumstances longitudinal-based repository - Answer-stores data across all encounters. "cradle to grave" or "womb to tomb" repository because data may extend over the entire lifespan of an individual. disadvantage is that a patient's record (and therefore the entire repository) can grow tremendously large with data that become less relevant over time. master person index (MPI) - Answer-the repository for the information used to uniquely identify each person, patient, or customer of a healthcare enterprise.