Numeric SpO2 Alarm Example

Purpose

This example demonstrates the use of the FHIR Observation resource to represent a numeric SpO2 (oxygen saturation) measurement with an associated alarm system. The resource is designed to monitor SpO2 levels and trigger alerts when the measurement falls outside predefined limits.

Key Features:

1. Profile Conformance:
   • The resource conforms to the PhdNumericObservation profile, ensuring compatibility with the FHIR Personal Health Device (PHD) implementation guide.
2. Alerting System:
   • The SimpleAlerting extension is used to define the alerting behavior:
     • Current Limits: Specifies the acceptable range for SpO2 values (80% to 100%).
     • Operational State: Indicates that the alerting system is active and monitoring the defined limits (Limits-On).
     • Alert Texts: Provides human-readable descriptions for the alerting behavior and threshold notifications.
3. Interpretation:
   • The interpretation element indicates that the measurement is currently in an alarm state (in-alarm).
4. Measurement Details:
   • The valueQuantity element records the SpO2 measurement as 79%, which is below the lower limit of 80%, triggering the alarm.
5. Device and Patient Context:
   • The resource includes references to the associated patient and device, providing context for the measurement.

Use Case:

This example is intended for scenarios where continuous monitoring of SpO2 levels is critical, such as in hospital settings or remote patient monitoring. The alerting system ensures timely notifications when SpO2 levels fall below safe thresholds, enabling prompt intervention.

Generated Narrative: Observation numeric-spo2-alarm

Observation Gateway Device: Device: identifier = IEEE 11073 System Identifier,Bluetooth MAC address,Ethernet MAC address; type = MDC_MOC_VMS_MDS_AHD

Coincident Timestamp Reference: Observation MDC_ATTR_TIME_ABS

Simple Alerting

• currentLimits: 80.0-100.0 %
• alertOperationalState: Limits On
• alertOperationalText: Alerting when SpO2 < 80%
• thresholdNotificationText: SpO2 is below 80%

identifier: 74E8FFFEFF051C00-sisansarahId-urn:oid:1.2.3.4.5.6.7.8.10-149530-20181113175902.00-150588

status: Final

category: Vital Signs, PHD generated Observation

code: MDC_PULS_OXIM_SAT_O2

subject: Sisansarah Lorianthah Piggy (no stated gender), DoB Unknown ( Medical record number)

effective: 2018-11-13 17:59:02-0500

performer: Sisansarah Lorianthah Piggy (no stated gender), DoB Unknown ( Medical record number)

value: 79.0 % (Details: UCUM code% = '%')

interpretation: Measurement in alarm

device: Device: identifier = IEEE 11073 System Identifier: 74-E8-FF-FE-FF-05-1C-00,Bluetooth MAC address: Bluetooth Address as a device identifier#00-1C-05-FF-E8-74; manufacturer = Nonin_Medical_Inc.; serialNumber = 501900083; modelNumber = Model 3230; type = MDC_MOC_VMS_MDS_SIMP

Components