Stent delivery catheter with retention bands
First Claim
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1. A stent delivery catheter comprising:
- a flexible elongate shaft having proximal and distal ends and a lumen extending there through;
a balloon having a generally cylindrical body with a length, the balloon being sealingly mounted about the shaft distal end in fluid communication with the lumen, the balloon being inflatable to plastically expand a stent to a nominal diameter for implantation of the stent in a vessel of a patient, the balloon being deflatable and wrappable about the shaft to form a deflated profile; and
at least one elastic band being disposed around the balloon body and having;
i) a width substantially narrower than the length of the balloon body, ii) an ability to stretch elastically from a relaxed diameter smaller than the deflated profile to a stretched diameter larger than the nominal diameter, and iii) proximal and distal edges capable of mechanically engaging a stent from inside the stent.
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Abstract
A stent-delivery catheter includes a balloon having a generally cylindrical body and at least one narrow elastic band disposed around the cylindrical body. The balloon may have several elastic bands mounted at spaced apart locations thereon. The elastic bands provide improved grip between the balloon and a stent through increased friction and/or mechanical engagement with the edges of the bands.
104 Citations
14 Claims
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1. A stent delivery catheter comprising:
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a flexible elongate shaft having proximal and distal ends and a lumen extending there through;
a balloon having a generally cylindrical body with a length, the balloon being sealingly mounted about the shaft distal end in fluid communication with the lumen, the balloon being inflatable to plastically expand a stent to a nominal diameter for implantation of the stent in a vessel of a patient, the balloon being deflatable and wrappable about the shaft to form a deflated profile; and
at least one elastic band being disposed around the balloon body and having;
i) a width substantially narrower than the length of the balloon body, ii) an ability to stretch elastically from a relaxed diameter smaller than the deflated profile to a stretched diameter larger than the nominal diameter, and iii) proximal and distal edges capable of mechanically engaging a stent from inside the stent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification