Which is more accurate for monitoring Blood Pressure (BP), the Dr. Watch or the Samsung Galaxy Watch?

Blood Pressure Monitoring: Dr. Watch vs. Samsung Galaxy Watch

For accurate blood pressure monitoring, upper arm cuff monitors that measure from the brachial artery are strongly recommended over wrist-based devices like the Dr. Watch or Samsung Galaxy Watch, as these wrist devices have not been adequately validated and are not recommended for routine clinical use. 1

Understanding Blood Pressure Measurement Devices

Types of BP Monitoring Devices

1. Upper Arm Monitors (Recommended)

   • Measure BP at the brachial artery
   • Most reliable and accurate method 1
   • Used in all epidemiological studies of high BP and its consequences
   • Should be the preferred type for most patients

2. Wrist Monitors (Not Recommended)

   • Less reliable than upper arm monitors
   • Require precise positioning at heart level
   • Most have failed validation studies 1
   • Not generally recommended for routine clinical use 1

3. Finger Monitors

   • Found to be very inaccurate
   • Should not be used 1

Why Smartwatch BP Monitors Are Problematic

Neither the Dr. Watch nor the Samsung Galaxy Watch can be recommended for accurate blood pressure monitoring for several critical reasons:

• Wrist-based devices are inherently less accurate than upper arm monitors 1
• Most commercially available wrist monitors have failed validation testing 1
• As few as 6% of commercially available BP measuring devices have been adequately tested 1
• Smartwatch BP monitors typically have not undergone proper validation according to established protocols 1

Validation Standards for BP Monitors

For a BP monitor to be considered accurate, it should:

• Be validated according to protocols from organizations such as:
  • Association for the Advancement of Medical Instrumentation (AAMI)
  • British Hypertension Society (BHS)
  • European Society of Hypertension Working Group 1
• Be listed on validated device databases such as:
  • www.stridebp.org
  • www.validatebp.org 1
  • www.dableducational.org
  • www.bhsoc.org 1

Recommendations for Home BP Monitoring

If you need to monitor your blood pressure at home:

1. Choose a properly validated upper arm monitor 1
2. Have your healthcare provider verify the device accuracy by comparing readings with their clinical device 1
3. Use proper measurement technique:
   • Rest 5 minutes before measurement
   • Sit with back supported and feet flat on floor
   • Position arm at heart level
   • Use appropriate cuff size
   • Take 2-3 readings, 1-2 minutes apart 1
4. Have your device checked for accuracy every 1-2 years 1

Common Pitfalls to Avoid

• Relying on non-validated devices: Most BP monitors on the market have not been properly validated 2, 3
• Improper positioning: Wrist monitors require precise positioning at heart level, which is difficult to maintain consistently 1
• Inaccurate reporting: Consider devices with memory or automatic data transmission 1
• Inappropriate cuff size: Using the wrong size cuff can significantly affect readings 1

In conclusion, while smartwatches like the Dr. Watch or Samsung Galaxy Watch may offer convenience, they cannot be recommended for accurate blood pressure monitoring. For reliable BP measurements that can inform clinical decisions, a validated upper arm monitor remains the standard of care.