Dynamic splint for post-operative treatment of flexible implant arthroplasty of the fingers

• US 6,093,162 A
• Filed: 11/16/1998
• Issued: 07/25/2000
• Est. Priority Date: 11/16/1998
• Status: Expired due to Fees

• Current Assignee: The Arthritis Society BC and Yukon Division
• Original Assignee: The Arthritis Society BC and Yukon Division
• Inventors: Fairleigh, Angela, Duruisseau, Eugene
• Primary Examiner(s): LEWIS, KIM M
• Application Number:
  US09/192,377
• Time in Patent Office: 617 Days
• Field of Search: 602/5, 602/16, 602/20, 602/21, 602/6, 602/7, 602/30, 128/877-880, 623/57, 623/63, 623/64, 601/33, 601/40, 482/44, 482/47, 482/49
• US Class Current: 602/22
• CPC Class Codes: A61F 5/013 for the arms, hands or fingers A61F5/0118 takes precedence

Abstract

An improved splint for post-operative treatment of a patient following flexible implant arthroplasty of the fingers. The splint is sizeable to a patient'"'"'s hand, and features controls for the degree of flexion and extension of each finger, as well as for the alignment of the splint with the natural pivot axis of the finger joint(s) which have been repaired.

Claims

1. A splint for post-operative treatment of at least one surgically repaired joint of a patient'"'"'s fingers, the repaired joint being located at the union between two finger bones and having a natural pivot axis about which the bones move relative to one another when in anatomically correct alignment, said splint comprising:

(a) a brace securable to a forearm of the patient;

(b) at least one finger support for engaging a finger of the patient containing the repaired joint, wherein said finger support is moveable about a support pivot axis to permit movement of the finger between extended and flexed positions; and

(c) an adjustment frame coupling said finger support to said brace for adjusting the position of said support pivot axis until it is substantially coaxial with the natural pivot axis of the repaired joint.

2. The splint of claim 1, wherein the width, height and length of said adjustment frame are independently adjustable.

3. The splint of claim 1, wherein said adjustment frame is pivotally coupled to said brace.

4. The splint of claim 1, wherein said adjustment frame further comprises:

(a) a rod pivotally coupled to said brace and extending transversely between opposite sides of said splint; and

(b) at least one side frame sidably coupled to said rod and lockable at a selected transverse position thereon.

5. The splint of claim 4, wherein said adjustment frame further comprises at least one side bar extending longitudinally alongside the patient'"'"'s hand which is slidably coupled to said side frame and is lockable at a selected longitudinal position.

6. The splint of claim 4, wherein said rod is pivotally coupled to an undersurface of said brace and extends underneath said brace.

7. The splint of claim 6, wherein said adjustment frame comprises a pair of side frames, each side frame extending upwardly and outwardly from said rod to a respective side of said splint.

8. The splint of claim 7, wherein said adjustment frame comprises a pair of side bars, wherein each side bar is slidably coupled to an upper end of a respective side frame.

9. The splint of claim 8, comprising a pair of said finger supports, wherein each finger support is pivotally coupled to a forward end of one of said side bars.

10. The splint of claim 9, wherein each said finger support is an assembly comprising:

(a) a rigging arm pivotally coupled to said side arm and extending inwardly therefrom above the finger in said extended position; and

(b) a sling adjustably connectable to said rigging arm for supporting the finger.

11. The splint of claim 10, wherein said finger support further comprises:

(a) a spar slidable transversely on said rigging arm and lockable at a selected transverse position, said spar having a support rod which extends longitudinally; and

(b) a sling holder slidable longitudinally on said spar, wherein said sling is detachably connectable to said spar.

12. The splint as defined in claim 11, wherein each finger support comprises a pair of said rigging arms independently pivotable relative to said side bar, wherein said rigging arms extend at different elevations above the hand of the patient in said extended position.

13. The splint as defined in claim 12, wherein said adjustment frame further comprises a plurality of flexion locks, wherein each of said locks releasably maintains one of said rigging arms at a selected angular position between said extended and flexed positions.

14. The splint of claim 1, wherein said brace comprises:

(a) an elongated stay conformable to the contour of the patient'"'"'s forearm; and

(b) a flexible armlet receiving said stay and releasably fastenable around the patient'"'"'s forearm.

15. The splint of claim 1, wherein said finger support is pivotally coupled to a forward end of said adjustment frame.

16. The splint of claim 1, wherein said finger support is biased toward said extended position.

17. The splint of claim 16, wherein said adjustment frame further comprises a flexion lock for releasably locking said finger support at a selected angular position between said extended and flexed positions.

18. The splint of claim 17, further comprising an adjustable stop for restraining rearward pivoting motion of said finger support in said extended position.

19. The splint as defined in claim 1, further comprising a clamp extending underneath said brace, wherein said brace and said adjustment frame are independently pivotally connected to said clamp by first and second ball joint connectors.

20. A splint for post-operative treatment of a patient following metacarpophalangeal joint arthroplasty, the metacarpophalangeal joint being located at the union of two finger bones and having a natural pivot axis about which the bones move relative to one another when in anatomically correct alignment, said splint comprising:

(a) a brace secureable to a forearm of the patient;

(b) a finger support for engaging at least one finger of the patient near the patient'"'"'s metacarpophalangeal joint, wherein said finger support is moveable about a support pivot axis to permit movement of the finger between extended and flexed positions; and

(c) an adjustment frame coupling said finger support to said brace for adjusting the position of said support pivot axis until it is approximately aligned coaxial with the natural pivot axis of the metacarpophalangeal joint.

21. A splint for dynamically supporting at least one finger joint of a patient, the finger joint being located at the union between two finger bones and having a natural pivot axis about which the bones move relative to one another when in anatomically correct alignment, said splint comprising:

(a) a brace securable to a forearm of the patient;

(b) at least one finger support for engaging a finger of the patient containing the finger joint, wherein said finger support is moveable about a support pivot axis to permit movement of the finger between extended and flexed positions; and

(c) an adjustment frame coupling said finger support to said brace for adjusting the position of said support pivot axis until it is substantially coaxial with the natural pivot axis of the finger joint.

22. The splint as defined in claim 21, further comprising biasing means for biasing said finger support toward said extended position, wherein said biasing means applies a biasing force to the patient'"'"'s finger bones in a direction substantially perpendicular to the longitudinal axis thereof throughout the range of motion of the patient'"'"'s finger between the extended and flexed positions.

23. The splint as defined in claim 21, wherein said splint comprises first, second, third and fourth finger supports, each of said finger supports for supporting one of the patient'"'"'s fingers, wherein each of said first, second, third and fourth finger supports is pivotably coupled to said adjustment frame and is independently moveable relative thereto.

24. A hand splint for wear by a patient comprising:

(a) a brace securable to a forearm of the patient;

(b) at least one finger support for engaging a finger of the patient, wherein said finger support is moveable about a support pivot axis to permit movement of the patient'"'"'s finger between extended and flexed positions; and

(c) an adjustment frame coupling said finger support to said brace for adjusting the position of said support pivot axis, wherein said adjustment frame comprises a rod pivotally coupled to the brace and extending transversely between opposite sides of said splint and at least one side frame slidably coupled to said rod and lockable at a selected transverse position.

25. The hand splint as defined in claim 24, wherein said adjustment frame further comprises at least one side bar extending longitudinally alongside the patient'"'"'s hand which is slidably coupled to said side frame and is lockable at a selected longitudinal position, wherein said at least one finger support is pivotally coupled to said side bar.