US4665906A
Expired / Lapsed
US
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Medical devices incorporating sim alloy elements
Assignee: Medtronic Inc
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Filing: 1986-05-21
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Granted: 1987-05-19
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Expires: 2006-05-21
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 elments 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 E. Jervis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:22
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/14; A61B; A61B17/00; A61B17/064; A61B17/0642; A61B17/08; A61B17/56; A61B17/58; A61B17/68; A61B17/72; A61C; A61C7/00; A61C7/12; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2409; A61F6/00; A61F6/06; A61F6/14; A61L27/00; A61L27/02; A61L27/04; A61L31/02; A61L31/022; A61C2201/00; A61C2201/007; A61F2/0004; A61F2/01; 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
114 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 martensite at body temperature, the method comprising: 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 2
Independent Claim
114 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 martensite at body temperature, the method comprising: 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 3
Independent Claim
123 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 at least partly 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 4
Independent Claim
123 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 at least partly 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 5
Dependent Claim
117 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 at least partly 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 6
Dependent Claim
117 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 at least partly 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 7
Dependent Claim
38 words
The medical device assembly of claim 3 wherein said medical device comprises a heart valve having a valve body, a sewing cuff and a pseudoelastic shape-memory alloy ring employed to hold the sewing cuff onto the valve body.
Claim 8
Dependent Claim
14 words
The medical device assembly of claim 3 wherein said medical device comprises a catheter.
Claim 9
Dependent Claim
14 words
The medical device assembly of claim 5 wherein said catheter is a tracheal catheter.
Claim 10
Dependent Claim
16 words
The medical device assembly of claim 3 wherein said medical device comprises an intrauterine contraceptive device.
Claim 11
Dependent Claim
15 words
The medical device assembly of claim 3 wherein said medical device is a bone plate.
Claim 12
Dependent Claim
15 words
The medical device assembly of claim 3 wherein said medical device is a marrow nail.
Claim 13
Dependent Claim
16 words
The medical device assembly of claim 3 wherein said medical device is a dental arch wire.
Claim 14
Dependent Claim
15 words
The medical device assembly of claim 3 wherein said medical device is a bone staple.
Claim 15
Dependent Claim
14 words
The medical device assembly of claim 3 wherein said medical device is a clip.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |