TH67863A - Nails are used within the bone marrow cavity. - Google Patents

Abstract

DC60 (26/02/44) Intramuscular Nail (1) serves to fix the femoral head (10). The intramuscular nail consists of a distal end (2) suited for insertion into the medullary canal, an anterior end (3), and a longitudinal axis (4). A first hole (5) located near the anterior end (3) and cut obliquely to the longitudinal axis (4) serves to receive the femoral head fixation rod (10), with the midpoint (6) of the first hole (5) at an angle between 110 and 150 degrees to the longitudinal axis (4). A second hole (7) located between the first hole (5) and the anterior end (3) and cut obliquely to the longitudinal axis (4) serves to receive the femoral head fixation pin (20). The second hole (7) is constructed to be at least partially shaped in The shape of the elongated hole with width B and length L > B, where the length L of the elongated hole extends in the direction of the longitudinal axis (4), the intramuscular nail (1) serves for fixing the femoral segment. The intramuscular nail consists of a distal end (2) suitable for insertion into the medullary canal, an anterior end (3), and a longitudinal axis (4). The first hole (5), located further towards the anterior end (3) and cut obliquely to the longitudinal axis (4), serves to receive the femoral cap screw (10), with the midpoint (6) of the first hole (5) at an angle between 110 and 150 degrees to the longitudinal axis (4). The second hole (7), located between the first hole (5) and the anterior end (3) and cut obliquely to the longitudinal axis (4), serves to receive the femoral cap screw (20). The second hole (7) is constructed to have at least some partial shape in The shape of a long tapered hole with width B and length L > B, where the length L of the long tapered hole extends in the direction of the longitudinal axis (4).

Claims (15)

1. The internal medulla (1) nail is used for fixation of the femoral segment consisting of A) the distal end (2) suitable for introduction into the medullary canal; B) the anterior end (3); C) the longitudinal axis (4); D) the first hole (5) for receiving the femoral tubercle fixation rod (10) which is placed next to the anterior end (3) and cut obliquely to the aforementioned longitudinal axis (4); E) the midline of the aforementioned first hole (5) which is made at an alpha angle between 30 and 70 degrees to the aforementioned longitudinal axis (4); and F) the hole (7) for receiving the femoral tubercle fixation pin (20) which is placed between the first hole (5) and the anterior end (3) and cut obliquely to the aforementioned longitudinal axis (4). It is notable that G) the second hole (7) is constructed to have a shape at least that It is partially formed into a long, tapered hole with width B and length L > B H). The length L of the long, tapered hole extends in the direction of the axis along the length (4) mentioned above. 2. The nails used inside the bone marrow cavity as requested in claim 1 have a specific characteristic in that the first hole (5) is in the shape of a cylindrical cylinder. 3. The nails used inside the marrow cavity as claimed under either claim 1 or 2 are characterized by the fact that the lateral entrance (13) of the second hole (7) is cylindrical in shape and the central exit (14) of the second hole (7) is elongated in shape. 4. The nails used inside the marrow cavity as claimed under either claim 1 or 2 are characterized by the fact that the lateral entrance (13) and the central exit (14) of the second hole (7) are elongated in shape. 5. The nails used inside the marrow cavity under any one of the claims 1 through 3 are characterized by the width B of the second hole (7) being less than the diameter D of the first hole (5). 6. The nails used inside the marrow cavity as claimed under any of the claims 1 through 5 are characterized by the midline (8) of the second hole (7) making a beta angle between 30 and 70 degrees with respect to the longitudinal axis (4). 7. The nails used inside the marrow cavity under any one of the claims 1 through 5 are characterized by the midline (8) of the second hole (7) making a beta angle between 70 and 90 degrees with respect to the longitudinal axis (4). 8. The nails used inside the bone marrow cavity, as claimed under any one of claims 1 through 7, are characterized by the length L of the tapered hole being between 8 and 12 mm, ideally between 9 and 11 mm. 9. The nails used inside the bone marrow cavity, as claimed under any one of claims 1 through 7, are characterized by the width B of the elongated hole being between 5 and 10 mm, ideally between 6 and 7 mm. 10. The nails used inside the marrow cavity under any of the claims 1 through 9 are characterized in that, in addition to this, at least one third hole (9) is formed off the distal end (2) to receive the distal locking rod (30). 11. The nails used in the marrow cavity under any one of the claims 1 through 10 are characterized by the central axis (6) of the first hole (5) making an alpha angle between 40 and 55 degrees with respect to the longitudinal axis (4). 12. The nails used intra-marrow as claimed under any one of claims 1 through 11 are characterized by an L:B ratio within the range of 1.05 and 2.00, ideally between 1.10 and 1.60. 13. The nails used inside the marrow cavity under any one of the claims 1 through 12 are characterized by the fact that the lateral entrance (13) of the second hole (7) is elongated in shape and the central exit (14) of the second hole (7) is cylindrical in shape. 14. The fixation devices consisting of nails used in the femoral cavity, as requested under any one of the claims 1 to 13, including the femoral capillary screw (10) and femoral capillary pin (20), are characterized by the fact that the femoral capillary pin (20) is 5 mm to 20 mm shorter than the femoral capillary screw (10), which should ideally be 10 mm to 15 mm. 15. The fixation device as claimed in claim 14 is characterized by the diameter of the femoral head locking pin (20) being consistent with the width B of the second hole (7) which is shaped like a long, tapered hole.