Wearables Meet Emergency Medicine
Consumer wearable devices, from Apple Watches to Fitbits to continuous glucose monitors, are generating health data that EMS providers encounter with increasing frequency. Patients may show you their device data during assessments, and some wearables can detect conditions that prompt 911 calls. Understanding these technologies helps you integrate their data into your clinical assessment.
Relevant Wearable Technologies for EMS
Smartwatch ECG and Heart Rate Monitoring
Devices like the Apple Watch and Samsung Galaxy Watch can record a single-lead ECG, detect atrial fibrillation, identify high and low heart rates, and alert users to irregular rhythms. When a patient presents their smartwatch ECG, treat it as supplementary data. It can provide valuable information about the rhythm at the time of symptom onset (which may have resolved by the time you arrive), but it does not replace your 12-lead ECG or clinical assessment.
Continuous Glucose Monitors (CGMs)
CGMs like the Dexcom and Libre systems provide real-time glucose readings and trend data. In diabetic patients, CGM data can show you whether the blood glucose is rising or falling and how rapidly. This trend information can help guide your treatment decisions, though always confirm with a finger-stick glucometer before treating, as CGM readings can lag behind actual blood glucose by 5 to 15 minutes.
Fall Detection and Emergency SOS
Many smartwatches can detect falls and automatically call 911 if the wearer does not respond. EMS providers are increasingly responding to calls generated by these automated systems. Some of these calls are legitimate emergencies; others are false activations triggered by physical activity or accidental impacts.
Integrating Wearable Data into Assessment
- Ask patients if they use any health monitoring devices during your history-taking
- Review device data if it is relevant to the chief complaint (rhythm history for palpitations, glucose trends for diabetic emergencies)
- Document any wearable device data you reviewed and how it influenced your clinical decision-making
- Remember that consumer devices are not medical-grade instruments; use them as supplementary information, not as primary diagnostic tools
- Photograph the device screen if it shows relevant data (with patient consent) for hospital handoff
Future Implications
Remote patient monitoring is expanding beyond consumer wearables. Home-based monitoring systems for heart failure patients, COPD patients, and post-surgical patients are generating data that can trigger EMS responses when parameters exceed thresholds. As these systems become more common, EMS providers will need to understand how to access and interpret this data in the field.