First experimental results with a new type of stent: the double-coil device

• Published in: Cardiovascular and interventional radiology 2003-05, Vol.26 (3), p.269-272
• Main Authors: Strecker, Ernst-Peter, Song, Ho-Young, Kang, Sung-Gwon, Dongming, Hou, Schumacher, M
• Format: Article
• Language: English
• Subjects: Animals; Blood Vessel Prosthesis; CAROTID ARTERIES; Coated Materials, Biocompatible; DOGS; Equipment Design; Equipment Safety; Femoral Artery - diagnostic imaging; Femoral Artery - surgery; FLOW MODELS; Follow-Up Studies; Hyperplasia - diagnostic imaging; Iliac Artery - diagnostic imaging; Iliac Artery - surgery; Models, Animal; Models, Cardiovascular; NICKEL ALLOYS; PHENOBARBITAL; Radiography; RADIOLOGY AND NUCLEAR MEDICINE; Stents; TITANIUM ALLOYS; Treatment Outcome; Tunica Intima - diagnostic imaging; Tunica Intima - pathology
• ISSN: 0174-1551; 1432-086X
• DOI: 10.1007/s00270-003-2658-1

To introduce a new stent design and evaluate its technical properties. This stent consists of two nitinol wires partially connected to each other. After delivery through a catheter a tube-like helical stent forms within the artery. After experimental tests in flow models regarding mechanical properties, introduction and delivery technique, 15 stents were implanted into iliac, femoral, and carotid arteries of seven dogs. After 3-12 weeks angiographic follow-up stents were explanted for microscopic examination. Stents with expanded diameters of 5-10 mm can be introduced through a 5 Fr catheter with 0.038 inch luminal diameter. Thrombotic vessel occlusion was observed in one iliac artery after incorrect stent placement with diameter mismatch. Fourteen of 15 stents remained patent and revealed minor intimal hyperplasia in the areas of the stent strut connection points as well as some reduction in medial thickness. This new stent design has a small introduction diameter which is independent of the expanded diameter. The stent's principal characteristics may serve as a basis for further special developments.