Intramedullary devices and methods of deploying the same
First Claim
1. ) A method of effecting a reamed deployment of an internally locking intramedullary nail within a fractured bone, the method comprising:
- a) inserting a guide wire into a canal of the bone;
b) inserting an elongated sleeve having a plurality of radial openings into the canal of the bone such that said sleeve passes along said guide wire;
c) removing said guide wire from said elongated sleeve;
d) outwardly extending a first set of at least one anchor element through respective radial openings in an oblique position facing one end of said sleeve to anchor against movement in a longitudal direction; and
e) outwardly extending a second set of at least one said anchor element through respective radial openings in an oblique position facing the opposite end of said sleeve to anchor against movement in the opposite longitudal direction.
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Accused Products
Abstract
Internally locking intramedullary nails or devices and methods of deploying internally locking intramedullary nails are disclosed. According to some embodiments, the nail includes a cannulated sleeve, a plurality of anchoring elements, and one or more extension mechanisms for outwardly extending anchoring elements to anchor against movement along an elongated axis of the sleeve. Exemplary methods include but are not limit to methods of securing an internally locking intramedullary nail within a fracture bone, methods of effecting a reamed deployment of an internally locking intramedullary nail, and methods of modifying the extend to which anchoring elements are extended to effect dynamization useful for inducing bone growth. According to some embodiments, the internally locking intramedullary device includes a first extension mechanism operative to outwardly extend at least one anchoring element of a first set of anchoring elements through respective radially openings in the sleeve at an oblique position facing one end of the sleeve to anchor against movement in a longitudal direction and a second extension mechanism independent of or decoupled from the first extension mechanism operative to outwardly extend at least one anchoring element of a second set of anchoring elements through respective radially openings in the sleeve at an oblique position facing the opposite end of the sleeve to anchor against movement in the opposite longitudal direction. According to some embodiments, the intramedullary device includes a differential extension mechanism operative to extend anchoring elements through respective radial openings such that an increase in displacement of individual said anchor elements of first and second groups of anchoring elements generated by operation of the differential extension mechanism is distributed between the first and second groups as a function of resistance encountered by the first and second groups of anchoring elements. Some embodiments of the present invention provide hip prosthetic implant for replacing the proximal portion of a femur, where the implant includes at least one deformable clamping element for outwardly engaging surrounding bone tissue to anchor a stem portion of the implant within the intramedullary canal.
150 Citations
41 Claims
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1. ) A method of effecting a reamed deployment of an internally locking intramedullary nail within a fractured bone, the method comprising:
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a) inserting a guide wire into a canal of the bone;
b) inserting an elongated sleeve having a plurality of radial openings into the canal of the bone such that said sleeve passes along said guide wire;
c) removing said guide wire from said elongated sleeve;
d) outwardly extending a first set of at least one anchor element through respective radial openings in an oblique position facing one end of said sleeve to anchor against movement in a longitudal direction; and
e) outwardly extending a second set of at least one said anchor element through respective radial openings in an oblique position facing the opposite end of said sleeve to anchor against movement in the opposite longitudal direction. - View Dependent Claims (2, 3, 4, 5, 6)
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7. ) A method of securing an internal fixation device within a fractured bone, the method comprising:
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a) inserting an elongated sleeve having a plurality of radial openings into the canal of the bone;
b) outwardly extending a first set of at least one anchor element through respective said radial openings in an oblique position facing one end of said sleeve to anchor against movement in a longitudal direction; and
c) following said extending of said first set of anchor elements, outwardly extending a second set of said anchor elements through respective said radially openings in an oblique position facing the opposite end of said sleeve to anchor against movement in the opposite longitudal direction, - View Dependent Claims (8, 9, 10, 11)
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12. ) A method of fixing a fractured bone, the method comprising:
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a) inserting into a canal of the bone an elongated sleeve having a radial opening on a proximal side and a radial opening on a distal side of said sleeve;
b) through each said radial opening outwardly extending anchor elements to anchor against longitudal movement such that a proximal anchor element is disposed in an oblique position facing one end of said sleeve and a distal anchor element is disposed in an oblique position facing the opposite end of said sleeve;
c) waiting time to allow the bone to at least partially heal; and
d) at least partially retracting only said proximal anchor element to allow axial play between fragments of the bone. - View Dependent Claims (13, 14, 15, 16)
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17. ) An internally locking intramedullary device particularly useful for securing bone fragments, comprising:
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a. an elongate tubular sleeve including plurality of radial openings for insertion into the medullary canal of the bone fragments to be secured; and
b. a plurality of anchoring elements, a first set of at least one said anchoring element coupled to a first extension mechanism operative to outwardly extend at least one said anchoring element of said first set of anchor elements through respective radial openings at an oblique position facing one end of said sleeve to anchor against movement in a longitudal direction, a second set of at least one said anchor element coupled to a second extension mechanism decoupled from said first extension mechanism operative to outwardly extend at least one said anchoring element of said second set through respective radial openings at an oblique position facing the opposite end of said sleeve to anchor against movement in the opposite longitudal direction. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. ) An internally locking intramedullary device particularly useful for securing bone fragments, comprising:
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a. an elongated sleeve including a plurality of radial openings for insertion into the medullary canal of the bone fragments to be secured; and
b. a plurality of anchoring elements coupled to a differential extension mechanism operative to outwardly extend each said anchor element through a said radial opening such that an increase in displacement of individual said anchor elements of first and second groups of said anchoring elements generated by operation of said differential extension mechanism is distributed between said first and second groups as a function of resistance encountered by said first and second groups of anchoring elements. - View Dependent Claims (25, 26, 27, 28)
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29. ) An implant for replacing the proximal portion of a femur, the implant comprising:
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a) a head member having a spherical portion configured for positioning into a hip socket;
b) an elongated stem portion adapted for insertion into the intramedullary canal of the femur joined to said head member; and
c) at least one deformable clamping element for outwardly engaging surrounding bone tissue upon relative linear displacement of two ends of said deformable elongated clamping element towards each other to produce an outward displacement of at least a medial portion of said deformable clamping element thereby securing said elongated stem portion within said intramedullary canal - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification