US5694946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for in vivo monitoring of physiological pressures
Assignee: St Jude Medical Systems AB
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Filing: 1994-06-23
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Granted: 1997-12-09
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Expires: 2014-06-23
Abstract
Abstract The present invention provides a method of diagnosing damaged intervertebral disks by measuring pressure in a plurality of disks and comparing the different pressures to ascertain the damaged disk. Another method provides for localising a damaged intervertebral disk by measuring pressure in a first disk suspected to be damaged, and measuring the pressure in disks surrounding the suspected disk, comparing the different pressures and diagnosing the damaged disk or simultaneously registering how vertebrae move relative to one another.
Inventors
- 👤 Lars Tenerz
- 👤 Bertil Hoek
- 👤 Svante Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:46
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/03; A61B5/032; A61B5/45; A61B5/4514
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
25 words
A method of diagnosing damaged intervertebral disks, comprising: measuring pressures in a plurality of disks, and comparing the different pressures to ascertain the damaged disk.
Claim 2
Independent Claim
25 words
A method of diagnosing damaged intervertebral disks, comprising: measuring pressures in a plurality of disks, and comparing the different pressures to ascertain the damaged disk.
Claim 3
Independent Claim
58 words
A method of localising a damaged intervertebral disk, comprising the steps of: a) measuring the pressure in a first disk suspected to be damaged, b) measuring the pressure in the disks surrounding the suspected disk, c) comparing any difference in pressure among the disks, and d) diagnosing the disk with a differing pressure to be the damaged disk.
Claim 4
Independent Claim
58 words
A method of localising a damaged intervertebral disk, comprising the steps of: a) measuring the pressure in a first disk suspected to be damaged, b) measuring the pressure in the disks surrounding the suspected disk, c) comparing any difference in pressure among the disks, and d) diagnosing the disk with a differing pressure to be the damaged disk.
Claim 5
Dependent Claim
17 words
The method as claimed in claim 2, comprising measuring the pressure in at least two adjacent disks.
Claim 6
Dependent Claim
14 words
The method claimed in claim 2, including measuring the pressure of the disks simultaneously.
Claim 7
Dependent Claim
18 words
The method as claimed in claim 3, including measuring the pressure in at least three closely adjacent disks.
Claim 8
Dependent Claim
16 words
The method as claimed in claim 3, including measuring the pressure in four closely adjacent disks.
Claim 9
Independent Claim
31 words
A method of localising a damaged intervertebral disk, comprising, measuring the pressure in a first disk suspected to be damaged, and simultaneously registering how the vertebrae move relative to each other.
Claim 10
Independent Claim
31 words
A method of localising a damaged intervertebral disk, comprising, measuring the pressure in a first disk suspected to be damaged, and simultaneously registering how the vertebrae move relative to each other.
Claim 11
Dependent Claim
13 words
The method of claim 7, including registering the vertebrae movement by roentgen stereophotogrammetry.
References Cited (Backward Citations)
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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) | 2000-12-08 | 2001-06-09 | 2001-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-08 | 2005-06-09 | 2005-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-08 | 2009-06-09 | 2009-12-09 | $7700.00 | Window Closed / Lapsed |