Hong Kong Digital Health Infrastructure and Data Standards
English with a size of 2.67 MBHong Kong Healthcare and Life Expectancy 2024
Hong Kong maintains exceptional health standards, with a life expectancy in 2024 of 85.42 years (83.13 for males and 88.79 for females). The annual healthcare expenditure is approximately HK$109.5 billion, accounting for 19% of government spending. Public services are provided by the Hospital Authority (HA) and the Department of Health (DH), complemented by private clinics and hospitals.
The Role of the Hospital Authority (HA)
The Hospital Authority is a statutory body established in 1990. Its primary roles include managing public hospitals and implementing clinical IT systems. Key IT contributions include:
- Automation and Enterprise Resource Planning (ERP)
- Pharmacy Billing and Revenue Collection (PBRC)
- Clinical alerts and outbreak management
Health Information Management and Governance
Managing health information involves mitigating risks such as availability, privacy, and obsolescence. Governance is managed through bodies like the ITGC, CIPSG, ERP PSC, and ITAC. The system supports 53,000 staff and millions of daily transactions for Hong Kong's 7.1 million residents. Notably, all systems have been developed in-house since 1990.
| Category | Examples | Purpose |
|---|---|---|
| Clinical | CMS (Clinical Management), LIS (Labs), RIS (Radiology), ePR | Support orders, results, imaging, and clinical summaries |
| Business | HRPS (HR/Payroll), PBRC (Pharmacy/Billing), FMRS (Facilities) | Administration, staffing, procurement, and billing |
| Informational | CDW, CDARS | Data warehousing for analytics, reporting, and surveillance |
Evolution of ePR and eHRSS
The Public-Private Interface – Electronic Patient Record Sharing Pilot Project (PPI-ePR) was launched by the Hospital Authority in 2006 as a one-way system. This evolved into the eHRSS in 2016, a two-way, opt-in model. Key functions include summaries, laboratory results, radiology, and dispensing records.
Understanding EHR vs. EHRS
- EHR (Electronic Health Record): A database of an individual’s healthcare data collected during medical encounters.
- EHRS (Electronic Health Record System): The supporting software system that enables the functions needed to create and maintain an EHR.
Clinical Decision Support Systems
Data Standards and Interoperability
Storing vast amounts of medical data requires robust standards to ensure compatibility:
- Functional Interoperability: Agreement on message formats and APIs, such as HL7 v2 messages or FHIR APIs.
- Semantic Interoperability: Use of common terminologies like SNOMED-CT for clinical concepts, LOINC for labs, and ICD for classification to ensure data is computable.
HL7 and Archetypes
HL7 is based on ISO 13606, which is broken into components and sub-components. These systems typically use archetypes, which serve as basic templates for data structure.
HL7 v2 Message Structure
An HL7 v2 message is line-based, where each line represents a segment. For example:
MSH|^~\&|SendingApp|SendingFac|ReceivingApp|ReceivingFac|202501011230||ORU^R01|12345|P|2.3
PID|1||123456^^^Hosp^MR||DOE^JOHN||19800101|M|||123 Main St^^City^HK
OBR|1||67890|TEST^Blood Test
OBX|1|NM|GLU^Glucose||5.6|mmol/L|3.9-6.1|N- MSH: Message header containing metadata and encoding characters.
- PID: Patient identification and demographics.
- OBR: Order details (e.g., lab order).
- OBX: Observation/result (value, units, and reference range).
- Delimiters:
|for fields,^for components,&for sub-components,~for repeats, and\as the escape character.
The DIKW Pyramid in Healthcare
- Data: Raw measurements (e.g., glucose = 5.6 mmol/L).
- Information: Data in context (e.g., a trend over three readings).
- Knowledge: Interpretation (e.g., the patient’s glucose is within control).
- Wisdom: Applying knowledge to clinical decisions (e.g., adjusting a long-term care plan).
Modern Trends and AI Assistance
Modern healthcare now emphasizes preventive care. The Hospital Authority is currently investigating the integration of AI assistance within the medical field to enhance service delivery.
Clinical Terminologies and Classifications
- SNOMED-CT: (Systematized Nomenclature of Medicine Clinical Terms) A comprehensive clinical terminology started in 1965. It is a global language for recording clinical facts.
- LOINC: (Logical Observation Identifiers Names and Codes) A universal standard for identifying medical laboratory observations started in 1994. It follows a six-axis model: Component, Kind of Property, Timing, System, Scale, and Method.
- ICD: (International Classification of Diseases) Used primarily for insurance billing and statistical classification where highly specific clinical data is less critical than in SNOMED-CT.
