The Primary Patency and Fracture Rates of Self-Expandable Nitinol Stents Placed in the Popliteal Arteries, Especially in the P2 and P3 Segments, in Korean Patients.
10.3348/kjr.2011.12.2.203
- Author:
Il Soo CHANG
1
;
Hyun Keun CHEE
;
Sang Woo PARK
;
Ik Jin YUN
;
Jae Joon HWANG
;
Song Am LEE
;
Jun Seok KIM
;
Seong Hwan CHANG
;
Hong Geun JUNG
Author Information
1. Department of Radiology, Konkuk University Hospital, Seoul 143-729, Korea.
- Publication Type:Original Article
- Keywords:
Artery;
Stent;
Intervention;
Fluoroscopy;
Fracture;
Angioplasty
- MeSH:
Aged;
Aged, 80 and over;
Alloys;
Angiography;
Arterial Occlusive Diseases/radiography/*therapy/ultrasonography;
Chi-Square Distribution;
Female;
Fluoroscopy;
Humans;
Korea;
Leg/blood supply;
Male;
Middle Aged;
Peripheral Vascular Diseases/radiography/*therapy/ultrasonography;
*Popliteal Artery;
Prosthesis Failure;
Retrospective Studies;
*Stents;
Tomography, X-Ray Computed;
Ultrasonography, Doppler, Color;
Ultrasonography, Doppler, Duplex;
Vascular Patency
- From:Korean Journal of Radiology
2011;12(2):203-209
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: We wanted to evaluate the status of self-expandable nitinol stents implanted in the P2 and P3 segments of the popliteal artery in Korean patients. MATERIALS AND METHODS: We retrospectively analyzed 189 consecutive patients who underwent endovascular treatment for stenoocclusive lesions in the femoropopliteal artery from July 2003 to March 2009, and 18 patients who underwent stent placement in popliteal arterial P2 and P3 segments were finally enrolled. Lesion patency was evaluated by ultrasound or CT angiography, and stent fracture was assessed by plain X-rays at 1, 3, 6 and 12 months and annually thereafter. RESULTS: At the 1-month follow-up, stent fracture (Type 2) was seen in one limb (up to P3, 1 of 18, 6%) and it was identified in seven limbs at the 3-month follow-up (Type 2, Type 3, Type 4) (n = 1: up to P2; n = 6: P3). At the 6-month follow-up, one more fracture (Type 1) (up to P3) was noted. At the 1-year follow-up, there were no additional stent fractures. Just four limbs (up to P2) at the 2-year follow-up did not have stent fracture. The primary patency was 94%, 61% and 44% at 1, 3 and 6 months, respectively, and the group with stent implantation up to P3 had a higher fracture rate than that of the group that underwent stenting up to P2 (p < 0.05). CONCLUSION: We suggest that stent placement up to the popliteal arterial P3 segment and over P2 in an Asian population can worsen the stent patency owing to stent fracture. It may be necessary to develop a stent design and structure for the Asian population that can resist the bending force in the knee joint.
