IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0271085
(2011-10-11)
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등록번호 |
US-8377038
(2013-02-19)
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발명자
/ 주소 |
|
출원인 / 주소 |
- Boston Scientific Scimed, Inc.
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인용정보 |
피인용 횟수 :
0 인용 특허 :
21 |
초록
Medical devices, such as catheters, including shape memory materials, are provided, as well as related methods of making and using such medical devices.
대표청구항
▼
1. A catheter comprising: an outer member;an inner member; anda structure located between the outer and inner members, the structure comprising a shape memory polymer and a conductive material on the shape memory polymer,wherein the structure is configured to be spaced from one of the outer member o
1. A catheter comprising: an outer member;an inner member; anda structure located between the outer and inner members, the structure comprising a shape memory polymer and a conductive material on the shape memory polymer,wherein the structure is configured to be spaced from one of the outer member or the inner member at a first temperature, and to contact both the inner and outer members at a second temperature. 2. The catheter of claim 1, wherein at the first temperature, the structure is configured to abut the outer member and be spaced from the inner member, and at the second temperature, the structure is configured to couple the outer member to the inner member, thereby reducing movement of the outer member relative to the inner member. 3. The catheter of claim 1, wherein the structure is a sleeve and a diameter of a portion of the sleeve at the first temperature is larger than a diameter of the sleeve at the second temperature. 4. The catheter of claim 3, wherein the shape memory polymer includes a first portion, a second portion longitudinally adjacent the first portion, and a third portion longitudinally adjacent the second portion, wherein the conductive material is on the second portion only. 5. The catheter of claim 3, wherein the shape memory polymer comprises a first portion, a second portion longitudinally adjacent the first portion, and a third portion longitudinally adjacent the second portion, wherein the conductive material is on the first and third portions only. 6. The catheter of claim 5, wherein the second portion is secured to the outer member. 7. The catheter of claim 1, wherein at least a portion of the shape memory polymer is substantially circular in transverse cross-section at a first temperature and non-circular in transverse cross-section at a second temperature. 8. The catheter of claim 1, wherein the structure is a sleeve and the conductive material extends completely around a perimeter of the sleeve. 9. The catheter of claim 1, wherein the conductive member is connected to a conductor. 10. The catheter of claim 1, wherein the conductive material is selected from the group consisting of metals, alloys, ceramics, and graphite. 11. The catheter of claim 1, wherein the shape memory polymer comprises a polymer that is selected from the group consisting of natural polymers, zein, casein, gelatin, gluten, serum albumin, collagen, polysaccharides, polyhyaluronic acid, poly(3-hydroxyalkanoate)s, alginate, dextran, cellulose, collagen, synthetic polymers, chemical derivatives of collagen, chemical derivatives of cellulose, polyphosphazenes, poly(vinylalcohols), polyamides, polyacrylates, polyalkylenes, polyacrylamides, polyalkylene glycols, polyalkylene oxides, polyalkylene terephthalates, polyvinyl ethers, polyvinyl esters, polyvinyl halides, polyvinylpyrrolidone, polyesters, degradable polymers, polyester amides, polyanhydrides, polycarbonates, polyorthoesters, polylactides, polyglycolides, polysiloxanes, polyurethanes, cellulose derivatives, and mixtures thereof. 12. The catheter of claim 1, wherein the shape memory polymer comprises a polymer that is selected from the group consisting of polynorbomene, polycaprolactone, polyenes, nylons, polycyclooctene (PCO), blends of PCO and styrene-butadiene rubber, polyvinyl acetate/polyvinylidinefluoride (PVAc/PVDF), blends of PVAc/PVDF/polymethylmethacrylate (PMMA), polyurethanes, styrene-butadiene copolymers, polyethylene, trans-isoprene, blends of polycaprolactone and n-butylacrylate, and blends thereof. 13. The catheter of claim 1, wherein the shape memory polymer comprises polycyclooctene. 14. A catheter comprising: an outer member;an inner member; anda structure located between the outer and inner members, the structure comprising a shape memory polymer and a conductive material on the shape memory polymer, wherein the shape memory polymer includes three or more segments, each segment having a different transitional temperature. 15. The catheter of claim 14, wherein the three or more segments are layers. 16. The catheter of claim 14, wherein each segment includes a multiblock copolymer. 17. The catheter of claim 14, wherein a first segment has a transitional temperature of from about 40° C to about 75° C, a second segment has a transitional temperature of from about 37° C to about 55° C, and a third segment has a transitional temperature of from about 15° C to about 25° C. 18. The catheter of claim 14, wherein the conductive material is selected from the group consisting of metals, alloys, ceramics, and graphite. 19. The catheter of claim 14, wherein the shape memory polymer comprises a polymer that is selected from the group consisting of polynorbomene, polycaprolactone, polyenes, nylons, polycyclooctene (PCO), blends of PCO and styrene-butadiene rubber, polyvinyl acetate/polyvinylidinefluoride (PVAc/PVDF), blends of PVAc/PVDF/polymethylmethacrylate (PMMA), polyurethanes, styrene-butadiene copolymers, polyethylene, trans-isoprene, blends of polycaprolactone and n-butylacrylate, and blends thereof.
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