Endovascular stenting of superficial femoral artery stenosis and occlusions: results and risk factor analysis.
OBJECTIVE
To determine the early and midterm results of femoro-popliteal angioplasty with adjunctive stenting and to identify factors affecting early and continuing success.


METHODS
Sixty-nine consecutive balloon angioplasty procedures on the superficial femoral artery (SFA) were performed in 60 limbs and 55 patients in the operating theater. Fifty-two percent of lesions were occlusions, and 87% involved the distal half or the whole segment of the SFA. Immediate endovascular stenting was used in all procedures, involving the placement of 105 stents, with a mean stented length of 13.8 cm. Twenty-nine procedures (43%) were performed for critical ischemia. Three-monthly duplex ultrasound was used for follow up assessment, with stenosis of > 50% defined as the endpoint for failure. The patient demographic and biochemical data, and procedural details were correlated with success criteria according to Society of Vascular Surgery standards.


RESULTS
Initial technical success by intent to treat was 92%, with four procedure-related complications and no deaths. Initial success by anatomic, hemodynamic and clinical criteria were 98.3, 96.7 and 93.3% respectively (92.2, 90.6 and 87.5% by intent to treat). Cumulative primary patency at 6, 12, and 24 months was 73.1, 62.6 and 53.8%, and secondary patency 84.9, 72.1 and 72.1% correspondingly. Significant factors relating to inferior patency were occlusions, stented segment length > 10 cm, procedure in claudicants, and the use of the Memotherm stent.


CONCLUSIONS
Angioplasty and stenting of the superficial femoral artery has acceptable primary and secondary patency rates even in the presence of long stenosis and occlusions. A duplex surveillance program is recommended for early detection and timely treatment of restenosis.
Department of Surgery, The University of Hong Kong Medical Centre, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, PR China. wkcheng@hku.hk
S W
SW
Cheng
A C
AC
Ting
J
J
Wong
D000368:Aged; D000369:Aged, 80 and over; D000800:Angioplasty, Balloon; D001157:Arterial Occlusive Diseases / Q000628:therapy*; D003251:Constriction, Pathologic; D005163:Factor Analysis, Statistical; D005260:Female; D005263:Femoral Artery; D006801:Humans; D015993:Life Tables; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D015607:Stents; D016896:Treatment Outcome