5100A Arteriosclerosis detection system

Time：2017-06-06

Function：

1. Pulse Wave Velocity, (PWV)

2. Ankle Brachial Pressure Index (ABI)

Characteristic:

1、Pulse Wave Velocity, (PWV)

（1）、PWV(Pules Wave Velocity)： 

PWV calculated formula and clinic assessment standard:

PWV = distance/time difference(Δt) 

(2) Clinical significance

The reduction of arterial elasticity is the composite reaction of early vascular wall damage that is caused by various cardiovascular risk factors. It not only the early vascular pathological markers with high specificity and sensitivity, but a king of high risk factor, which take part in the evolution and occurrence of cardiovascular disease. Therefore, the non-invasive measurement of the Artery elastic functional system examination has been a popular research topic. The pulse wave velocity measurement is regular indicator of the non-invasive measurement of the Artery elastic functional system examination. PWV, as a non-invasive measurement, can early detect dysfunctions of the artery, and synthetically reflect various risk factors of vascular damage.  

   (3) The range of normal and abnormal PWV value

The value of PWV increases with the increase of age, its reference Value is 1400cm/s.

According to assessment of American College of Cardiology medical scientific report (1993):

l PWV<1400cm/s: normal value.

l 1400cm/s ≤ PWV ≤ 1800cm/s: mild peripheral arteriosclerosis.

  2. Ankle Brachial Pressure Index (ABI)

 (1) ABI = 

    (2) Clinical significance

The use of ABI can help to non-invasively assess the open of lower limb arterial blood vessels, and can predict a variety of cardiovascular and cerebrovascular events, it is more accurate and more objective to measure arteriosclerosis than applying a single PWV value. This is because, if the arterial is stenosis or occlusion, the pulse wave will be blocked in the occlusion site, so the pulse wave transmission will slow down. At this time, regardless of the extent of arteriosclerosis, PWV sometimes may always show a normal or lower value, which mislead the diagnosis of disease. While the ABI will be significantly reduced. From the value of ABI, we can find the occlusion of lower extremity arteries. Therefore, the ABI index can be used as a complement to PWV, which provide more comprehensive prediction of arteriosclerosis.

In normal situation, ABI≥1. If ABI＜1, lower extremity artery may have stenosis occlusive lesions. If ABI＜0.5, lower extremities have severe ischemia. If conditions permit, lower extremity blood supply should be reconstructed in time.

(3) Normal ABI range is 0.9 - 1.4

PACKING LIST

TYPE BX-5100A ARTERIOSCLEROSIS DETECTING SYSTEM