Clinical Informatics Certification Clinical Decision Support Systems 3 — Questions and Answers
Question 1: An infobutton in an EHR MOST directly supports which CDS function?
- Linking context-sensitive clinical reference information at the point of care (Correct answer)
- Alerting clinicians to critical lab values
- Automating medication reconciliation
- Providing order sets for common diagnoses
Correct answer: Linking context-sensitive clinical reference information at the point of care
Infobuttons use the clinical context (patient data, active order) to surface relevant reference information from external knowledge resources.
Question 2: Which architecture allows third-party CDS tools to integrate with an EHR using FHIR APIs without modifying the EHR source code?
- CDS Hooks (Correct answer)
- HL7 v2 messaging
- Direct Trust framework
- SMART on FHIR standalone launch
Correct answer: CDS Hooks
CDS Hooks is a standard that enables external CDS services to receive EHR context via FHIR and return cards to the clinician's workflow.
Question 3: A clinical pharmacist notices a CDS drug-allergy alert fires for a penicillin allergy when cephalosporins are ordered, even for patients whose allergy is documented as 'rash only.' This BEST represents a need to improve:
- Alert stratification by allergy severity (Correct answer)
- Knowledge base vendor contract terms
- EHR downtime procedures
- Laboratory interface mapping
Correct answer: Alert stratification by allergy severity
Stratifying alerts by allergy severity (e.g., anaphylaxis vs. rash) reduces unnecessary alerts while maintaining safety for high-risk patients.
Question 4: Which of the following is an example of a passive CDS intervention?
- A reference summary displayed in the sidebar of a patient chart (Correct answer)
- A mandatory hard stop before ordering a contraindicated drug
- A pop-up requiring justification before signing a high-dose opioid order
- An automated page to the on-call physician for a critical potassium value
Correct answer: A reference summary displayed in the sidebar of a patient chart
Passive CDS presents information without interrupting workflow, such as reference content visible without requiring clinician interaction.
Question 5: The HITECH Act incentivized meaningful use of CDS primarily through which mechanism?
- Financial incentives for EHR adoption and demonstrating CDS use in qualifying measures (Correct answer)
- Mandatory FDA approval of all clinical decision support algorithms
- Requiring CDS audits by The Joint Commission
- Establishing a federal CDS knowledge repository
Correct answer: Financial incentives for EHR adoption and demonstrating CDS use in qualifying measures
HITECH's Meaningful Use program tied financial incentives to demonstrating use of certified EHRs with specific CDS functions like drug-interaction checking.
Question 6: Which type of clinical knowledge representation is MOST appropriate for encoding a complex branching guideline with conditional logic?
- Decision tree or rule-based logic (Correct answer)
- Narrative text summary
- LOINC code mapping
- HL7 v2 ADT message
Correct answer: Decision tree or rule-based logic
Decision trees and rule-based representations capture if-then-else branching logic that mirrors complex clinical guideline recommendations.
Question 7: During a CDS implementation project, a 'pre-post' study design is used to evaluate effectiveness. What is the PRIMARY limitation of this approach?
- Inability to control for concurrent changes that may affect outcomes (Correct answer)
- Lack of patient-level data
- Insufficient statistical power for alert studies
- Regulatory restrictions on pre-post study designs
Correct answer: Inability to control for concurrent changes that may affect outcomes
Pre-post designs cannot isolate the CDS effect from other simultaneous changes in practice, policy, or patient population.
Clinical Informatics Certification Clinical Decision Support Systems 3
An infobutton in an EHR MOST directly supports which CDS function?