EP0145166A2
Expired / Lapsed
EP
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Medical device comprising a shape memory alloy
Assignee: Raychem Corp
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Filing: 1984-10-12
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Granted: —
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Expires: 2004-10-12
Abstract
Abstract Medical devices which are currently proposed to use elements made from shape memory alloys may be improved by the use of stress-induced martensite alloy elements instead. The use of stress-induced martensite decreases the temperature sensitivity of the devices, thereby making them easier to install and/or remove.
Inventors
- 👤 James Jervis
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-22 22:54
CPC Classifications
A; A61; A61C; A61C7/00; A61C7/12; A61F; A61F2/00; A61F2/01; A61B; A61B17/00; A61B17/064; A61B17/0642; A61B17/08; A61B17/56; A61B17/58; A61B17/68; A61B17/72; A61F2/02; A61F2/24; A61F2/2409; A61F6/00; A61F6/06; A61F6/14; A61L; A61L27/00; A61L27/02; A61L27/04; A61L31/00; A61L31/02; A61L31/022; A61C2201/00; A61C2201/007; A61F2/04; A61F2/06; A61F2/07; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30092; A61F2210/00; A61F2210/0014; A61F2210/0019; A61L2400/00; A61L2400/16
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
40 words
A medical device intended for use within a mammalian body, or in such proximity to a mammalian body that the device is substantially at body temperature, which device comprises an alloy element which displays stress-induced martensite at said body temperature.
Claim 2
Dependent Claim
40 words
A medical device intended for use within a mammalian body, or in such proximity to a mammalian body that the device is substantially at body temperature, which device comprises an alloy element which displays stress-induced martensite at said body temperature.
Claim 3
Dependent Claim
27 words
A device according to claim 1 which is a heart valve, the alloy element being a ring employed to hold a sewing cuff onto the valve body.
Claim 4
Dependent Claim
29 words
A device according to claim 1 which is a catheter, the alloy element being the catheter or a part thereof which causes the catheter to assume a bent shape.
Claim 5
Dependent Claim
11 words
A device according to claim 3 which is a tracheal catherter.
Claim 6
Dependent Claim
20 words
A device according to claim 1 which is an intrauterine contraceptive device or a bone plate, or a marrow nail.
Claim 7
Dependent Claim
19 words
A device according to claim 1 which is a dental arch wire, or a bone staple or a clip.
Claim 8
Independent Claim
47 words
A method of installing a pseudoelastic shape-memory alloy medical device within a mammalian body, or in such proximity to a mammalian body that the device is substantially at body temperature wherein the pseudoelastic shape-memory alloy medical device displays reversible stress-induced aartensite at body temperature, the method comprising:
Claim 9
Independent Claim
47 words
A method of installing a pseudoelastic shape-memory alloy medical device within a mammalian body, or in such proximity to a mammalian body that the device is substantially at body temperature wherein the pseudoelastic shape-memory alloy medical device displays reversible stress-induced aartensite at body temperature, the method comprising:
Claim 10
Dependent Claim
67 words
deforming the medical device into a deformed shape different from a final shape, said deforming occurring by the formation of stress-induced martensite; restraining the deformed shape of the medical device by the application of a restraining means; positioning the medical device and restraining means within, or in proximity to, the body; removing the restraining means; isothermally transforming the device from the deformed shape into the final shape.--
Claim 11
Dependent Claim
67 words
deforming the medical device into a deformed shape different from a final shape, said deforming occurring by the formation of stress-induced martensite; restraining the deformed shape of the medical device by the application of a restraining means; positioning the medical device and restraining means within, or in proximity to, the body; removing the restraining means; isothermally transforming the device from the deformed shape into the final shape.--
Claim 12
Independent Claim
120 words
A method of installing a medical device within a mammalian body, or in such proximity to a mammalian body that the device is substantially at body temperature, the method comprising: manufacturing the medical device from a pseudoelastic shape-memory alloy wherein the pseudoelastic shape-memory alloy medical device displays reversible stress-induced martensite at body temperature; deforming the medical device into a deformed shape different from a final shape, said deforming occurring by the formation of stress-induced martensite; restraining the deformed shape of the medical device by the application of a restraining means; positioning the medical device and restraining means within, or in proximity to the body; removing the restraining means; isothermally transforming the device from the deformed shape into the final shape.--
Claim 13
Independent Claim
120 words
A method of installing a medical device within a mammalian body, or in such proximity to a mammalian body that the device is substantially at body temperature, the method comprising: manufacturing the medical device from a pseudoelastic shape-memory alloy wherein the pseudoelastic shape-memory alloy medical device displays reversible stress-induced martensite at body temperature; deforming the medical device into a deformed shape different from a final shape, said deforming occurring by the formation of stress-induced martensite; restraining the deformed shape of the medical device by the application of a restraining means; positioning the medical device and restraining means within, or in proximity to the body; removing the restraining means; isothermally transforming the device from the deformed shape into the final shape.--
Claim 14
Dependent Claim
115 words
A medical device assembly for use within a mammalian body or in such proximity to a mammalian body that the medical device is substantially at body temperature, comprising: a medical device and a restraining means; said medical device being made of a pseudoelastic shape-memory alloy displaying reversible, stress-induced martensite at body temperature; said medical device being deformed by the formation of stress-induced martensite into a shape different from a final shape and then restrained in the deformed shape by said restraining means; said medical device and said restraining means being positioned in the body whereupon the restraining means is removed and the medical device isothermally transforms from the deformed shape into the final shape. ***********************************************
Claim 15
Dependent Claim
115 words
A medical device assembly for use within a mammalian body or in such proximity to a mammalian body that the medical device is substantially at body temperature, comprising: a medical device and a restraining means; said medical device being made of a pseudoelastic shape-memory alloy displaying reversible, stress-induced martensite at body temperature; said medical device being deformed by the formation of stress-induced martensite into a shape different from a final shape and then restrained in the deformed shape by said restraining means; said medical device and said restraining means being positioned in the body whereupon the restraining means is removed and the medical device isothermally transforms from the deformed shape into the final shape. ***********************************************
References Cited (Backward Citations)
No citation records indexed.
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