Blood Pressure and Heart Rate Measuring Watch

Patent title: Blood pressure and heart rate measuring watch

Patent number: US06084961

Patent filing date: 1979-10-15

Patent issue date: 1982-05-25

Inventor(s):Ronald L. Broadwater Russell R. Haynes Samah A. Mitry

Assignee (if applicable): TECH ENGR AND DESIGN

U.S. classification:  G04G21/025

Claims: 16

Figure 1. This figure shows the watch itself and the sensor on the watch band part.


This invention is a portable blood pressure and heart rate monitoring device that is in a wrist watch format. Blood pressure and heart rate signal is measured by the sensor on the watch that attached to wrist when it’s wear by patient. This wrist can measure systolic and diastolic pressure and heart accurately and quickly, as well as tell time. In addition, with this compact format, patient can wear it in many circumstances and operate it without lots of professional knowledge.

People who like to do exercise and elder people might be interested in this invention.  people who do exercise often might want to know there heart rate in order to control their heart rate in a certain range, so that their exercise effect can be the most ideal for them. For elder people who potentially or actually have heart problems, a portable heart rate and blood pressure monitor like this invention would be ideal for them to monitor their heart condition, so that they can find treatment before the condition become worse.

In order to achieve the monitoring function, a piezoelectric transducer is placed on the watch band. when patient wear it, the transducer attach the radial artery,and it will generate electrical pressure impulse which correspond to the magnitude of blood pressure. The highest impulse is recognized as systolic impulse, and the lowest impulse is recognized as diastolic impulse. Also, a time counter is employed to measure the heart rate. There are also some prior art of this type health monitor. For example, US. Pat. No. 3’807’388. with this device, heart rate is measured by counting heart beat in a known frequency, and the heart beat is then related a particular average heart rate. Since that device does not measure the heart rate directly, it can be somewhat inaccurate.

I choose this patent because smart watch is currently a popular wearable health product, and it’s getting more and more developed. I am surprised that this patent was issued in 1979 which is about 40 years before. It seems this type compact wearable technology is now more commonly accepted by customers. The concept to bring convince of health monitoring from hospital to everyone’s side is a kind of evolution of medical system.

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One thought on “Blood Pressure and Heart Rate Measuring Watch

  1. I wonder whether this device would be accurate with movement. It seems that for reliable readings proper and consistent positioning of the watch as well as tightening of the band would be required for something that relies on pressure sensing via piezoelectric transducers. Do you know whether this concept was ever commercialized?

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