The TM-ABI system is indicated for use on adult subjects at risk of having or developing peripheral arterial disease (PAD).
TM-ABI system is intended for the rapid measurement of ankle-brachial pressure index (ABPI), or ankle-brachial index (ABI), and pulse volume recording (PVR)/ volume plethysmography in adults.

It is suitable for use in wound care assessment, for assessing symptomatic PAD, and as a screening device for PAD. It may also be used on patients with venous or arterial ulcers prior to the application of compression therapy.

The ankle-brachial index (ABI) is the ratio of the systolic blood pressure measured at the ankle to that measured at the brachial artery.


Originally described by Winsor in 1950, the ABI was initially proposed for the noninvasive diagnosis of lower-extremity peripheral artery disease (PAD).
Later, it was shown that the ABI is an
indicator of atherosclerosis at other vascular sites and can serve as a prognostic marker for cardiovascular events and functional impairment, even in the absence of symptoms of PAD.


- Measurements based on the Plethysmography:  During the inflation and deflation of pressure in the cuffs, the plethysmography related to the change in blood volume in large artery is displayed. The most modern sensors and analogue-to-digital converters allow TM-ABI sensing to 4.6 micrometers of mercury and thus enable accurate results.

- Improved user error detection system: The TM-ABI will alert the operator of any irregularities which have occurred during the measurement process. For example, if the cuff has been poorly placed or if the patient has been moving during the measurement, the error message will be displayed on the screen.

- Objective measurement: TM-ABI’s specially designed algorithm is based on the plethysmographic techniques, which are independent of the operator and therefore ensures objective measuring of blood pressures and ABI . The subjectivity of the operator is thus excluded.

- Repeatable measurement: Regardless of who performs the measurement, whether it is a physician or a nurse, regardless of all the disturbances that come from the office, and whether you can feel the pulse on patient´s ankle or not. The measurement result with TM-ABI will always be the same. The TM-ABI’s software algorithm uses a special protocol where variables are measured and calculated equally for each examination. The measurement of the Ankle-Brachial Index is reliable as well as repeatable and thus very valuable for physicians and patients.

- Fast exam: The TM-ABI measurement time is only 3 minutes.

- Accuracy compared to the doppler method:  Comparing the Ankle brachial Index measured by TM-ABI and by the conventional Doppler probe method, the clinical study returned a coefficient of correlation r= 0.88 (95% CI: from 0.76 to 0.97).

NOTES! TM-ABI has been calibrated with special conic cuffs  and those cuffs are only sold by LD Technology. In case of  use of any other cuff,
LD Technology cannot warranty the accuracy of the measurements.