Wrist Link Blood Pressure Monitor

Selling Points
It is often said even healthy individuals should check their blood pressure several times a day in order to keep tabs on their physical condition. CASIO's new WRIST LINK BLOOD PRESSURE MONITOR now makes healthy living easier than ever before by making it possible to check your blood pressure just about any time and any time throughout the day. An upper arm type Base Unit lets you take highly accurate measurements at home and provides "basic data" that can be transferred send to the Watch monitor. Basic data stored in Watch monitor memory is used for taking quick and easy blood pressure reading while on the go. The Base Unit and Watch provide the perfect combination for monitoring your blood pressure and overall health throughout the day.

Base Unit	Watch
Quick and easy blood pressure measurements at home. Set up mobile unit with personal data. Displays diastolic and systolic blood pressure, and pulse.	Lets you monitor damages in your blood pressure on the go, based on personal data vales input on the base unit. Memory for up to 30 seconds, each containing diastolic and systolic blood pressure, and pulse measurements. Includes timepiece for current time, calendar, and alarm


Measure your blood pressure with the Base Unit, and then use IR data communication to transfer the measured data to the Watch. Then you can use the Watch alone to take readings throughout the day.



	BP-1-1 Resin		BP-1D-7 Resin


Cuff		Base Unit
Arm diameter of 23 to 32 cm		Blood pressure measurement indicating ranges: Pressure: 0 to 300 mmHg Pulse rate: 40 to 180 bmp Pressure settings: 150, 180, 210 mmH Approx. battery life: 150 readings on AA-size (R6P) x 4 Size of case/ total weight 110 x 161 x 67 mm / 250 g (excluding batteries)

How the Watch Measures Blood Pressure

Blood Pressure Readings without Applying Pressure

Basic Operating Principtes

It is a known fact that a strong correlation exists between pulse wave velocity and changes in blood pressure at the upper arm. This Watch uses this fact to estimate blood pressure based on pulse wave transit time.

This means that unlike the Base Unit or other upper arm type blood pressure monitors, this Watch does not require that pressure be applied each time reading is taken.

Pulse Wave Velocity

The change in blood vessel volume over time caused when the heart contracts is called a "pulse wave" ("volume wave"). The time it takes for the pulse wave to reach a particular part of the body is the "pulse wave transit time (PWTT)," and the speed that the pulse travels is called the "pulse wave velocity." This watch measures the pulse wave transit time at the tip of the finger placed on a sensor, and uses this information to estimate blood pressure.

Pulse Wave Transit Time (PWTT) measurement

There are sensors that provide the data required to calculate blood pressures as described below.
The Watch's electro-potential sensor (the Watch's sensor where you place your finger is the negative terminal while the back of the watch in contact with your wrist is the positive terminal) detects the electrical signals generated right about the time the heart contracts. This electrical signal is the starting point of the pulse wave transit time. The Watch calculates the time between the electrical signal generated by the hearbeat and detection of the pulse wave at the fingertip placed on the Watch's sensor to determine the pulse wave transit time.



1 This sensor detects when a pulse wave reaches your fingertip. 2 This sensor is the negative electrode used for detecting differences in the body's electro-potential. *3 The entire back of the Watch acts as a positive electrode, which is used for detecting differences in the body's electro-potential.

Why is basic data nessary?

Though pulse wave velocity and blood pressure are roughly proportional, there tend to be slight differences from person to person. Because of this, the relationship between the measured blood pressure value and the pulse wave velocity of the particular individual for whom blood pressure readings are to be taken must be measured (using the Base Unit) and sent to the Watch so it knows what allowances need to be made for that indiviual. This relationship, which is different for each person, is called "basic data". The Watch must have correct basic data (measured pulse wave velocity data) in order to calculate proportional blood pressure values.

Note:

* It is important to remember that correct blood pressure measurements are impossible unless you correctly set your basic data. * The message XSET on the display of the Watch indicates that there is no basic data in the Watch's memory. You cannot use the Watch tot ake blood pressure readings while this message is on the display. * The Base Unit is required in order to set basic data.