Knee distractor

• US 20060149277A1
• Filed: 02/27/2004
• Published: 07/06/2006
• Est. Priority Date: 02/27/2003
• Status: Active Grant

• Current Assignee: Omnilife Science, Inc. (OrthoUnited, Inc.), Universite Joseph Fourier
• Original Assignee: Perception Raisonnement Action en Medecine, Universite Joseph Fourier
• Inventors: Cinquin, Philippe, Lavallee, Stephane, Marmignon, Christophe
• Granted Patent: US 7,635,369 B2
• Time in Patent Office: Days
• US Class Current: 606/90
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 17/155 Cutting femur
• CPC Class Codes: A61B 2017/00557 inflatable A61B2017/22051 takes precedence
• CPC Class Codes: A61B 2017/0268 for the knee

Abstract

The invention relates to a medical instrument (20) comprising a lower plate (22); at least one upper plate (24A, 24B) opposite the lower plate; a spacer means (26) which is disposed between the upper plate and the lower plate and used to permanently hold the upper plate is a substantially parallel position in relation to the lower plate and to move the upper plate away from the lower plate, said means being fully contained between the upper and lower plate, the minimal spacing between the outer surfaces of the upper plate and lower plate being less than 10 millimetres; and flexible control means connected to the spacing means

Claims

1. (canceled)

2. (canceled)

3. (canceled)

4. (canceled)

5. (canceled)

6. (canceled)

7. (canceled)

8. (canceled)

9. A medical instrument (20) comprising:

a lower element (22);

at least one upper element (24A, 24B) facing the lower element;

between the upper element and the lower element, spacing means (26) for permanently maintaining the upper element substantially parallel to the lower element and for \spacing apart the upper element from the lower element, said means being totally contained between the upper element and the lower element, the minimum interval between the external surfaces of the upper element and of the lower element being smaller than 10 millimeters; and

flexible control means connection to the spacing means.

10. The medical instrument of claim 9, comprising two upper elements (24A, 24B) arranged side-by-side and facing the lower element (22), each upper element being associated with spacing means (26).

11. The medical instrument of claim 9, comprising means for measuring the distance between the upper element (24A, 24B) and the lower element (22).

12. The medical instrument of claim 9, comprising means for measuring the forces exerted on the upper element (24A, 24B).

13. The medical instrument of claim 9, in which the spacing means (26) comprise a connection system formed of a series of links (28A, 28B, 28C, 28D) connected to each other and to the lower element (22) and to the upper element (24A, 24B) by pivotal connections (29A, 29B, 30A, 30B).

14. The medical instrument of claim 9, in which the spacing means (26) comprise a connection system formed of four links (28A, 28B, 28C, 28D), two lower inks connected to the lower element (22) by adjacent pivotal connections (29A, 29B), and two upper links connected to the upper element by adjacent pivotal connections, each lower link being connected to an upper link by a pivotal connection (30A, 30B), the connection system further comprising means for maintaining the lower links substantially symmetrical with respect to the median plane perpendicular to the lower element.

15. The medical instrument of claim 9, in which the spacing means (26) comprise a cable actuation means and/or a fluid actuator connected to the lower element (22) and to the upper element.

16. The medical instrument of claim 9, in which the external surface of the upper element (24A, 24B) is planar.

17. The medical instrument of claim 10, in which the lower element (22) and the upper elements (24A, 24B) comprise a recess (40) on the side opposite to the side intended to be closer to the patella (38).