Toe, finger systolic pressure measurement


The SysToe is suitable for toes, as part of the diagnosis or monitoring of arterial occlusive disease of the lower limbs, as for the fingers of the hand during the assessments of arteriovenous fistulas.

The SysToe represents an ingenious application of infrared photoplethysmography (PPG) coupled to a unique algorithm, developed and patented by Atys Medical. By means of a photoelectric cell, PPG detects changes in the blood flow in the vessels in the skin.

SysToe, by virtue of its reliability, ease of use and affordable price, enables toe and finger pressure measurement to be conveniently and readily performed by all health professionals (angiologists, nephrologists, diabetologists, vascular specialists, wounds department,…).


Ease of use

The user installs the occlusion cuff on the proximal phalanx of the toe or finger.

He/she positions the sensor with its cuff on the distal phalanx.

He/she presses the START key.

Finally, he/she validates the pressure displayed on the SysToe.

The measurement of systolic pressure with SysToe is easily achievable even outside the vascular laboratory.


Comfort in use

The cuffs are inflated and deflated automatically by the device and not by the user.



The SYSTOE is powered by a battery.

It weighs less than 0.5 kg.

It is easily transportable.

The measurement of the digital systolic pressure can be carried out indifferently in an examination room or at the patient bed.


Precision and sensitivity

The SysToe is able to measure pressures below 20 mmHg.

The occlusion cuff is deflated automatically at a controlled rate that ensures good measurement accuracy.

Clinical tests on 200 patients performed at the Nimes University hospital have demonstrated the reliability of the SysToe compared to laser Doppler. This study is published in "European Journal of Vascular and Endovascular Surgery" .

In less than two minutes, the toe pressure is available on the screen as well as the systolic pressure index if the brachial pressure is known.

précision systoe

Comparison with ankle pressure

The toe systolic pressure shows a good agreement with the ankle systolic pressure but it has the advantage of remaining measurable and reliable in patients with calcification lesions of the arterial wall.

For diabetic foot, ABI greater than 0.6 has little predictive value and needs to be replaced or supplemented by TBI.