How posture influences venous blood flow in the lower limbs: results of a study using photoplethysmography

Despite the ongoing treatment, in 10–20% of patients with obliterating diseases of the arteries of the lower limbs, the progression of the disease leads to amputation, with mortality rates being up to 50%.The aim: to determine the effectiveness of MSCT angiography in patients with type-D femoral-popliteal arteries according to TASC II with critical ischemia of the lower extremities and poor condition of outflow tracts for performing arterialization of venous blood flow and / or superimposition of arteriovenous fistula.Material and methods. 145 MSCT angiographic studies were performed for patients with arterial diseases of the lower extremities performed in “RAMSAY Diagnostics Rus”Moscow. For the analysis, 53 (37% of the total) of the patient with lesions of the femoropopliteal segment of Type D according to TASC II were selected. The analysis of the state of the arterial outflow pathways was carried out according to the modified Rutherford classification, where each artery of the shin was maximally assigned 3 points depending on the degree of stenosis, the blood flow resistance was estimated as 0 points – the absence of stenosis or stenosis less than 20%, 1 point stenosis 20–49% 2 points stenosis 50–99%, 3 points – occlusion.Results. The degree of resistance of arteries of outflow tracts of 39 limbs (16 right and 23 left) was calculated in 53 patients: 10 points in 23.7% of cases; 9 points in 5.1%; 8 points – 2.5%; 7 points 18%, 6 points in 5%; 5 points 2.5%; 4 points 15.4%; 3 points 7.7%; 2 points 0; 1 point 20.5%. In patients with poor arterial outflow, with a score greater than 7, there is a high risk of early thrombosis of the prosthesis, so such patients undergo an operation with the formation of an unloading arteriovenous fistula.Conclusion. MSCT angiography of the arteries of the lower extremities is an effective method for determining the severity of arterial damage with an accurate definition of the level, extent, prevalence with the possibility of using different classifications, including TASC II and theRutherford classification. It can be used as a screening, expert method in patients with arterial diseases of the lower extremities, may be an alternative to direct angiography, used to assess patients in the postoperative period.Key words: peripheral arterial disease, outflow score, ball classification of outflow tracts, runoff score, computed tomography, angiography.

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Peculiarities of the reaction of the lower limbs venous blood flow to the orthostatic test in men with arterial hypertension

Medical Council ◽

10.21518/2079-701x-2019-5-86-89 ◽

2019 ◽

pp. 86-89

Author(s):

T. F. Vagapov ◽

V. M. Baev ◽

S. V. Letyagina

Keyword(s):

Blood Flow ◽

Arterial Hypertension ◽

Flow Rate ◽

Femoral Vein ◽

Venous Blood ◽

Test Group ◽

Blood Flow Rate ◽

Lower Limbs ◽

Control Group ◽

Venous Blood Flow

A comparative analysis of the dynamics of lower limb vein angioscopy parameters in case of orthostasis between male patients (age 30–50 years) with arterial hypertension (test group – 60 people) and normal arterial pressure (control group – 27 people) was made. Orthostatic sample in all examined patients was characterized by a reliable increase in the diameter and area of vein section at a decrease in blood flow rate. However, in patients with hypertension the increase in the area of vein section was significantly less than in the control group. In orthostasis, the drop in blood flow rate in the total femoral vein was lower in men with hypertension than in men in the control group. In the great saphenous vein, a larger decrease in blood flow velocity was recorded than in the control group. In hypertension, no increase in the number of refluxes was recorded in orthostasis. Thus, hypertension in men is characterized by altered reaction of venous blood flow to orthostasis in both deep and saphenous veins.

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