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CBET: Healthcare Information Technology

CBET · Work through your exam, one topic at a time.

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Healthcare Information Technology

Why it matters

Medical devices increasingly live on hospital networks, so the CBET exam tests whether you can connect a device to the IT infrastructure without breaking either one. Know the roles of EHR/EMR, PACS, the laboratory information system (LIS), and pharmacy systems, and how data move between them.

Core concepts to master

  • Standards and interfaces: HL7 (clinical/administrative messaging), DICOM (medical imaging), FHIR (modern web-based interoperability), and IEEE 802.11 for wireless. Know which standard fits which data type - this is a frequent question.
  • Networking basics: IP addressing, DHCP (automatic address assignment), DNS (name resolution), VLANs (segmenting device traffic), switches vs routers, and wired vs wireless security.
  • Device integration: bedside monitors to central stations, infusion pumps to the EHR, and the concept of a device integration/connectivity engine.
  • Security and privacy: HIPAA Privacy Rule (use/disclosure of protected health information) vs Security Rule (administrative, physical, technical safeguards); encryption, authentication, least privilege, and patching.
  • Risk management for networked devices: IEC 80001-family concepts - inventory, risk assessment, and change control before connecting a device to the network.
  • Downtime and backup: what happens when the network fails, and how devices behave.

Traps

Mixing HL7 and DICOM; assuming HIPAA only means passwords; confusing a VLAN with a VPN; and forgetting that a device’s network configuration change is a change-control event requiring documentation and often vendor coordination.

Rule of thumb

Identify the data type first, then the standard, then the transport. Images → DICOM; orders, results, and ADT messages → HL7; web/app interoperability → FHIR; wireless link → 802.11. Then ask who owns the endpoint and who owns the network.

Worked example

A CT scanner cannot send studies to the archive. Verify the device’s IP/gateway and DICOM AE titles and destination port, confirm the PACS is reachable (ping), then check the DICOM service logs. Do not start by rebooting the scanner - verify the path first.