healthcare-expert

Healthcare Expert

Expert guidance for healthcare systems, medical informatics, regulatory compliance (HIPAA), and health data standards (HL7, FHIR).

Core Concepts

Healthcare IT

• Electronic Health Records (EHR)
• Health Information Exchange (HIE)
• Clinical Decision Support Systems
• Telemedicine platforms
• Medical imaging systems (PACS)
• Laboratory information systems

Standards and Protocols

• HL7 (Health Level 7)
• FHIR (Fast Healthcare Interoperability Resources)
• DICOM (Digital Imaging and Communications in Medicine)
• ICD-10 (diagnostic codes)
• CPT (procedure codes)
• SNOMED CT (clinical terminology)

Regulatory Compliance

• HIPAA (Health Insurance Portability and Accountability Act)
• HITECH Act
• GDPR for health data
• FDA regulations for medical devices
• 21 CFR Part 11 for electronic records

FHIR Resource Handling

from fhirclient import client
from fhirclient.models import patient, observation, medication
from datetime import datetime

# FHIR Client setup
settings = {
    'app_id': 'my_healthcare_app',
    'api_base': 'https://fhir.example.com/r4'
}
smart = client.FHIRClient(settings=settings)

# Patient resource
def create_patient(first_name, last_name, gender, birth_date):
    """Create FHIR Patient resource"""
    p = patient.Patient()
    p.name = [{
        'use': 'official',
        'family': last_name,
        'given': [first_name]
    }]
    p.gender = gender  # 'male', 'female', 'other', 'unknown'
    p.birthDate = birth_date.isoformat()

    return p.create(smart.server)

# Observation resource (vital signs)
def create_vital_signs_observation(patient_id, code, value, unit):
    """Create vital signs observation"""
    obs = observation.Observation()
    obs.status = 'final'
    obs.category = [{
        'coding': [{
            'system': 'http://terminology.hl7.org/CodeSystem/observation-category',
            'code': 'vital-signs',
            'display': 'Vital Signs'
        }]
    }]

    obs.code = {
        'coding': [{
            'system': 'http://loinc.org',
            'code': code,  # e.g., '8867-4' for heart rate
            'display': 'Heart rate'
        }]
    }

    obs.subject = {'reference': f'Patient/{patient_id}'}
    obs.effectiveDateTime = datetime.now().isoformat()

    obs.valueQuantity = {
        'value': value,
        'unit': unit,
        'system': 'http://unitsofmeasure.org',
        'code': unit
    }

    return obs.create(smart.server)

# Search patients
def search_patients(family_name=None, given_name=None):
    """Search for patients by name"""
    search = patient.Patient.where(struct={})

    if family_name:
        search = search.where(struct={'family': family_name})
    if given_name:
        search = search.where(struct={'given': given_name})

    return search.perform(smart.server)

# Get patient observations
def get_patient_observations(patient_id, category=None):
    """Retrieve patient observations"""
    search = observation.Observation.where(struct={
        'patient': patient_id
    })

    if category:
        search = search.where(struct={'category': category})

    return search.perform(smart.server)