Abstract:

Aim: was to evaluate morphological features of lesions in lower limb arteries before percutaneous transluminal angioplasty (PTA) and its arterial complications in patients with critical lower limb ischemia (CLI) combined with diabetes mellitus(DM).

Materials and methods: for the period from September 2010 to June 2013, a prospective single-center study was conducted involving 171 patients with CLI and DM (80(47%) men, mean age 64,1[54-68] years, mean HbA1c 8,3[7,4-9,6]%, mean duration of diabetes 16,5[8-23] years, diabetes type 1/2-18/153) who underwent PTA in 193 lower limbs. Myocardial infarction and brain stroke in anamnesis had 53(31%) and 19(11%) patients, respectively Chronic kidney disease (CKD) 3-4 stages had 40 patients(24%), end-stage renal disease - 16 cases (10%). Diagnosis of CLI was based on recommendation of TASC II. Patency of arteries of lower limbs was evaluated by duplex ultrasound (DU) before PTA and during early follow-up period (30 days). PTA in all patients was considered technically successful in restoring continuous arterial flow to the foot of at least one crural artery without residual stenosis >50%.

Results: stenosis>50% and occlusions of tibial arteries were found in all patients. Peripheral arterial disease 4-6 classes according Graziani L. classification was marked in 180(93%) cases. Extensive tibial arterial calcification was found in 123(64%) cases, in patients with residual stenosis (> 50% remaining diameter) -113 (89%). The mean value of transcutaneous oxygen pressure (tcpO2) before PTA was 14,7(8-25) mmHg, after PTA - 35,2 (31-38) mmHg. After PTA , residual stenosis (>50%) in treated arteries was in 125(79,1%) cases, thrombosis in treated arteries - 9(5,7%), intimal dissection - 18(11,4%), incomplete stent disclosure - 3(1,9%), incomplete capture stent area stenosis - 2(1,3%), dislocation of the stent - 1(0,6%). Repeat PTA in the early follow-up period was performed in 15 patients with clinically significant complications (6%).

Conclusion: CLI in diabetic patients is characterized by having severe morphological lesions of lower limb arteries, infrapopliteal arterial calcification. DU plays important role in evaluation of arterial patency and PTA complications in early follow-up period. The high level of residual stenosis of tibial arteries after PTA is associated with chronic complications of diabetes mellitus, including renal insufficiency Timely reintervention in diabetic patients with clinical significant PTA complications promotes optimal arterial patency and permission of CLI in theese cases. 

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