Hip joint device

Patent metadata

Field	Value
Publication number	US-2024382314-A1
Application number	US-202418786807-A
Country	US
Kind code	A1
Filing date	Jul 29, 2024
Priority date	Jul 10, 2009
Publication date	Nov 21, 2024
Grant date	—

Abstract

A locking member for implantation in a hip joint of a patient is provided. The hip joint has a caput femur integrated with a collum femur having a center axis extending longitudinal along the collum and caput femur in the center thereof. The locking member is adapted to assist in the fixation of a medical device, having an artificial hollow caput femur surface, to the collum and/or caput femur, wherein said artificial caput femur surface comprises at least one extending portion adapted to clasp a portion of the caput and/or collum femur, and wherein said locking member comprises an element adapted to lock said artificial caput femur surface such that the caput femur remains clasped and restrained in said artificial caput femur surface.

First claim

1 . A locking member for implantation in a hip joint of a patient, the hip joint having a caput femur integrated with a collum femur having a center axis extending longitudinal along the collum and caput femur in the center thereof, wherein said locking member is adapted to assist in the fixation of a medical device, having an artificial hollow caput femur surface, to the collum and/or caput femur, wherein said artificial caput femur surface comprises at least one extending portion adapted to clasp a portion of the caput and/or collum femur, and wherein said locking member comprises an element adapted to lock said artificial caput femur surface such that the caput femur remains clasped and restrained in said artificial caput femur surface.

2 . The locking member according to claim 1 , wherein said locking member is adapted to lock in at least a first and a second locking position, and wherein said locking member is adapted to; in said first locking position, lock a first artificial caput femur surface having at least one extending portion, to a caput femur and/or collum femur, and in said second locking position, lock a second smaller artificial caput femur surface having at least one extending portion, to the caput and/or collum femur.

3 . The locking member according to claim 1 , wherein said locking member is adapted to lock in at least a first and a second locking position, wherein said locking member is adapted to, in said first locking position, lock an artificial caput femur surface having at least one extending portion to a caput and/or collum femur, and wherein said locking member is adapted to, in said second locking position, lock said artificial caput femur surface tighter to the caput and/or collum femur.

4 . The locking member according to claim 1 , wherein said locking member is adapted to lock in at least a first and a second locking position, and wherein said locking member is adapted to; in said first locking position, lock an artificial caput femur surface having at least one extending portion, to a first size caput and/or collum femur, and in said second locking position, lock said artificial caput femur surface, to a second smaller size caput femur and/or collum femur.

5 . The locking member according to claim 1 , wherein said locking member comprises a loop-shaped element adapted to be connected in situ for creating said loop shape surrounding the caput and/or collum femur, when implanted.

6 . The locking member according to claim 5 , wherein said loop shaped element is adapted to have a first locking state, in which said loop shape has a first inner circumference, and wherein said loop shaped element is further adapted to have a second locking state, in which said loop shaped element has a second smaller inner circumference.

7 . The locking member according to claim 6 , wherein said loop shaped element is adapted to further have a third locking state, in which said loop shape has a third inner circumference being smaller than said first and second inner circumference.

8 . The locking member according to claim 5 , wherein said locking member is further adapted to be arranged in an area extending a distance beyond the maximum diameter of the caput femur.

9 . The locking member according to claim 5 , wherein said loop shaped element is an element selected from: a cord, a wire and a band.

10 . The locking member according to claim 1 , wherein said locking member comprises a first and second engagement member, and wherein said first engagement member is adapted to engage said second engagement member, when implanted.

11 . The locking member according to claim 10 , wherein said first and second engagement members are adapted to mechanically self connect by introducing a male part of said first engagement member into a female part of said second engagement member.

12 . The locking member according to claim 10 , wherein said first and second engagement members are fixated to the artificial caput femur surface on the inside thereof.

13 . The locking member according to claim 10 , wherein said first and second engagement members are fixated to the artificial caput femur surface on the outside thereof.

14 . The locking member according to claim 10 , wherein said artificial caput femur surface comprises at least one slit, and wherein said first and second engagement members are fixated to the artificial caput femur surface on two different sides of said slit, respectively.

15 . The locking member according to claim 10 , wherein said first and second engagement members are fixated to said artificial caput femur surface, on extending portion thereof.

16 . The locking member according to claim 5 , wherein said loop shaped element comprises a first and second end, and wherein said first and second ends are adapted to be connected to form said loop shaped element using an engagement member comprising two pivotable locking parts.

17 . The locking member according to claim 16 , wherein said first locking part is pivotably attached both to said first end of said locking member and to said second locking part.

18 . The locking member according to claim 17 , wherein said second locking part is attached to said first locking part in a point arranged substantially in the middle of said first locking part.

19 . The locking member according to claim 16 , wherein said first and second locking member ends are arranged overlapping each other when locked together.

20 . The locking member according to claim 1 , wherein said locking member is adapted to be fixated to the artificial caput femur surface, perpendicularly to said center axis of the caput and collum femur and adapted to partially surround the caput and/or collum femur and clasp the caput and/or collum femur.

21 - 120 . (canceled)

Assignees

• Forsell Peter

Inventors

• Forsell Peter

Classifications

• A61F2002/30818

  castellated or crenellated · CPC title

• A61F2002/30616

  Sets comprising a plurality of prosthetic parts of different sizes or orientations · CPC title

• A61F2/2814

  Bone stump caps · CPC title

• A61F2002/305

  Snap connection · CPC title

• A61F2002/30469

  using band clamps · CPC title