[특허]Medical device balloons with improved strength properties and processes for producing same

Medical device balloons with improved strength properties and processes for producing same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61M-029/00 A61L-031/06 A61M-025/10 B29C-047/00 B29C-047/86 A61L-031/12 B29C-047/82 B29C-047/88 B29L-031/00
출원번호	US-0331758 (2014-07-15)
등록번호	US-9956321 (2018-05-01)
발명자 / 주소	Wang, Lixiao Lindquist, Jeffrey S. Lee, Pao Nao Chen, John Jianhua Devens, Douglas A.
출원인 / 주소	BOSTON SCIENTIFIC SCIMED, INC.
대리인 / 주소	Seager, Tufte & Wickhem LLP
인용정보	피인용 횟수 : 0 인용 특허 : 58

초록 ▼

A tubular parison for forming a medical device balloon. The parison is formed of a polymeric material, for instance a thermoplastic elastomer. The parison has an elongation at break which is not more than 80% of the elongation of the bulk polymeric material. The elongation of the parison is controlled by altering extrusion conditions. Balloons prepared from the parisons provide higher wall strength and/or higher inflation durability than balloons prepared from conventional parisons of the same material.

대표청구항 ▼

1. An expandable medical balloon, the expandable medical balloon comprising: a balloon wall comprising a thermoplastic elastomer, the balloon having a calculated burst strength of 32,000 psi or greater in a pre-sterilized condition as defined by the following equation: Strength =(P×D/2t)where P = internal pressure when the balloon bursts (kg/cm2)(1 kg/cm2=14.2 psi); D is the exterior diameter (mm) of the balloon when a pressure of 6 kg/cm2 (85.2 psi) is applied; and t is the wall thickness (mm) of the portion of the balloon with the larger exterior diameter. 2. The expandable medical balloon of claim 1 wherein the expandable medical balloon has a calculated burst strength of about 34,000 or greater in a pre-sterilized condition. 3. The expandable medical balloon of claim 1 wherein the expandable medical balloon has a calculated burst strength of about 37,000 or greater in a pre-sterilized condition. 4. The expandable medical balloon of claim 1 wherein the expandable medical balloon has a calculated burst strength of about 32,000 or greater in a post-sterilized condition. 5. The expandable medical balloon of claim 1, the expandable medical balloon comprising poly (ether-block-amide) block copolymer. 6. The expandable medical balloon of claim 1, the expandable medical balloon comprising alternating layers of poly(ether-block-amide) block copolymer. 7. The expandable medical balloon of claim 6 wherein the alternating layers comprise a layer of poly(ether-block-amide) comprising a Shore D hardness of about 70 and a layer of poly(ether-block-amide) comprising a Shore D hardness of about 72. 8. The expandable medical balloon of claim 1, the expandable medical balloon comprising a nominal diameter of about 3 mm at 6 atm. 9. The expandable medical balloon of claim 1 comprising a poly(ether-block-amide) comprising a bulk elongation per ASTM D-638 of about 400%. 10. The expandable medical balloon of claim 1 wherein the thermoplastic elastomer is a poly(ether-block-amide) comprising a Shore D hardness of about 70. 11. The expandable medical balloon of claim 1 wherein the thermoplastic elastomer is a poly (ether-block-amide) comprising a Shore D hardness of about 72. 12. The expandable medical balloon of claim 1 wherein the thermoplastic elastomer is polyester/polyether block copolymer. 13. The expandable medical balloon of claim 1 wherein the thermoplastic elastomer is polyurethane. 14. The expandable medical balloon of claim 1 wherein the thermoplastic elastomer comprises a blend of thermoplastic elastomers. 15. The expandable medical balloon of claim 1 comprising improved resistance to repeat inflation bursts versus a control utilizing the same thermoplastic elastomer extruded to keep a parison elongation at break above 80% of the published elongation of the polymer.

이 특허에 인용된 특허 (58)

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Saab Mark A. (16 Nesmith St. Lawrence MA 01841), Dilatation balloon fabricated from low molecular weight polymers.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Medical device balloons with improved strength properties and processes for producing same 원문보기

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Medical device balloons with improved strength properties and processes for producing same 원문보기

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