Method for in vivo monitoring of physiological pressures

• US 5,694,946 A
• Filed: 12/20/1995
• Issued: 12/09/1997
• Est. Priority Date: 06/23/1993
• Status: Expired due to Term

• Current Assignee: Radi Medical Systems AB (Abbott Laboratories)
• Original Assignee: Radi Medical Systems AB (Abbott Laboratories)
• Inventors: Berg, Svante, Tenerz, Lars, Hoek, Bertil
• Primary Examiner(s): HINDENBURG, MAX F
• Application Number:
  US08/557,163
• Time in Patent Office: 720 Days
• Field of Search: 128/748, 128/774, 128/782
• US Class Current: 600/561
• CPC Class Codes: A61B 5/032 Spinal fluid pressure
• CPC Class Codes: A61B 5/4514 Cartilage

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.

Claims

1. 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.

2. 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.

3. The method as claimed in claim 2, comprising measuring the pressure in at least two adjacent disks.

4. The method claimed in claim 2, including measuring the pressure of the disks simultaneously.

5. The method as claimed in claim 3, including measuring the pressure in at least three closely adjacent disks.

6. The method as claimed in claim 3, including measuring the pressure in four closely adjacent disks.

7. 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.

8. The method of claim 7, including registering the vertebrae movement by roentgen stereophotogrammetry.