Granted Patent B1

US 12,048,629 · App. 17/130,055 · Granted Jul 30, 2024

Inventor: Peter Forsell (Lund, SE)

A61F2/3603A61F2/2814A61F2002/2828A61F2002/30462A61F2002/30469A61F2002/30471A61F2002/30495A61F2002/305A61F2002/30545A61F2002/30593A61F2002/30594A61F2002/30616A61F2002/30757A61F2002/30818A61F2/3601A61F2002/3615A61F2220/0025

Abstract

Claims (33)

1. A method for implantation of a locking member 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, the method comprise the following steps;

performing an operation in a hip joint surgically or arthroscopically,

placing an artificial hollow caput femur surface mounted onto caput femur,

placing a locking member for assisting in the fixation of the artificial caput femur surface, 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 the locking member is adapted to be placed onto the artificial caput femur surface at the extending portion,

clasping with the least one extending portion 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

locking by said locking member element said artificial caput femur surface such that the caput femur is

remaining clasped and restrained in said artificial caput femur surface.

2. The method according to claim 1 , wherein said locking member is adapted to lock in at least a first and a second locking position, the method comprising the steps of;

locking in said first locking position, and

locking in second position locking tighter the artificial caput femur surface with at least one extending portion, to the caput and/or collum femur.

3. The method according to claim 1 , wherein said locking member is adapted to lock in at least a first and a second locking position, the method comprising the steps of;

locking in said first locking position a first artificial hollow caput femur surface, and

locking in second position a second smaller artificial caput femur surface with at least one extending portion, to the caput and/or collum femur.

4. The method according to claim 1 using a locking member comprising a loop-shaped element, the method comprise the step of; locking in situ said loop shape surrounding the caput and/or collum femur.

5. The method according to claim 4 , locking said loop shaped element in a first locking state, in which said loop shape has a first inner circumference, and locking said loop shaped element in a second locking state, in which said loop shaped element has a second smaller inner circumference.

6. The method according to claim 1 , wherein said locking member further comprises a medical device comprising, an artificial caput femur surface being hollow, having a major opening adapted to be directed distally and being adapted to replace a caput femur hip joint surface, wherein said artificial caput femur surface further having;

a medical device caput center axis passing through said major opening, being aligned with the caput and collum femur center axis, when said medical device is implanted in a functional position in the hip joint, wherein said medical device comprises a central part and a surrounding part, the central part being aligned with the medical device center axis and the surrounding part surrounding the surface of the caput femur not including the central part, and wherein said medical device further comprises;

an inner surface adapted to have a first distal distance extending perpendicularly from said medical device caput center axis to said inner surface of said surrounding part of said artificial caput femur surface, said first distal distance being shorter than a second proximal distance extending perpendicularly from said medical device caput center axis to said inner surface of said artificial caput femur surface, said second proximal distance extending from a more proximal position on said medical device caput center axis than said first distal distance, being the second proximal distance, when said artificial caput femur surface is implanted in said functional position in the hip joint, the artificial caput femur surface comprise a lock holding member for holding the locking member in its position, the method involves the step of;

placing the artifical caput femur surface onto caput femur during a surgical or arthroscopical operation, a

placing the locking member and

locking said artifical caput femur surface to caput femur,

holding said locking member in place by said lock holding member.

7. A method for implantation at least one medical device 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 the collum femur is placed more distal than caput femur, wherein;

said medical device system comprises two or more medical devices, wherein each of the medical devices comprising:

an artificial caput femur surfaces being hollow, having a major opening adapted to be directed distally, when said medical device is implanted, wherein said artificial caput femur surface is adapted to replace a caput femur hip joint surface, further having;

a medical device caput center axis passing through said major opening, being aligned with the caput femur center axis, when said medical device is implanted in a functional position in the hip joint, wherein said medical device comprises a central part and a surrounding part, the central part being aligned with the medical device center axis and the surrounding part surrounding the surface of the caput femur not including the central part, and wherein said medical device further comprises;

an inner surface adapted to have a first distal distance extending perpendicularly from said medical device caput center axis to said inner surface of the surrounding part of said artificial caput femur surface, said first distal distance being shorter than a second proximal distance extending perpendicularly from said medical device caput center axis to said inner surface of said artificial caput femur surface, said second proximal distance extending from a more proximal position on said medical device caput center axis than said first distal distance, being the second proximal distance, when said artificial caput femur surface is implanted in said functional position in the hip joint, and

a locking member for implantation in a hip joint of a patient, wherein said locking member is adapted to assist in the fixation of said medical device to the collum and/or caput femur, 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, wherein at least one of said artificial caput femur surfaces has a size adapted to replace the caput femur hip joint surface of a corresponding size, wherein the method includes the step of;

surgically or arthroscopically implanting two or more artificial caput femur surfaces to find the right size to lock onto the caput femur.

8. The method according to claim 7 , further comprising two or more locking members, wherein the two locking members have different sizes, when in their locking position, and thus being adapted to lock different artificial caput femur surfaces of different sizes to a caput femur, or an artificial caput femur surfaces to caput femurs of different sizes, such that the caput femur remains clasped and restrained in the artificial caput femur surface, when locked by one of the two or more locking members having the matching size, the method involves the step of; using two or more locking members to lock the artificial caput femur surface of the correct size to the caput femur.

9. The method according to claim 1 , wherein said at least one extending portion is mounted according to at least one of the following alternatives:

a) extending circumferentially discontinuously along said equator line having enough circumferential distance lacking any extending portion and

b) extending with different distal extension in different extending portions or part of such portion of said circumferential extension.

Priority Claims (17)

Continuity (19)