TELESCOPING IM NAIL AND ACTUATING MECHANISM
First Claim
1. A length adjustable intramedullary nail system, comprising:
- an intramedullary nail, comprising;
a proximal outer body;
a distal body having a portion received by the proximal outer body;
a threaded shaft coupled to the distal body to rotate relative thereto;
an inner magnet received by the proximal outer body and coupled to the threaded shaft; and
a threaded block coupled to the proximal outer body, the threaded shaft passing through the threaded block such that rotation of the inner magnet and the threaded shaft causes relative axial movement between a) the inner magnet, the threaded shaft and the distal body and b) the proximal outer body.
1 Assignment
0 Petitions
Accused Products
Abstract
A length-adjustable IM nail system includes a telescoping IM nail with proximal and distal bodies. An inner magnet within the proximal body is connected to a threaded rod which, in turn, is connected to the distal body. The threaded rod passes through a threaded block which is connected to the proximal body. The position of the distal end of the threaded rod is fixed with respect to the distal body, but may rotate freely within this fixed position. An actuator is also disclosed that includes a pair of rotating magnets disposed in an angular relationship with each other and the axis of the IM nail and the patient'"'"'s limb. Rotation of these outer magnets in the same direction results in rotation of the inner magnet and threaded rod and a telescoping axial movement of the threaded block and proximal body with respect to the distal body.
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Citations
23 Claims
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1. A length adjustable intramedullary nail system, comprising:
an intramedullary nail, comprising; a proximal outer body; a distal body having a portion received by the proximal outer body; a threaded shaft coupled to the distal body to rotate relative thereto; an inner magnet received by the proximal outer body and coupled to the threaded shaft; and a threaded block coupled to the proximal outer body, the threaded shaft passing through the threaded block such that rotation of the inner magnet and the threaded shaft causes relative axial movement between a) the inner magnet, the threaded shaft and the distal body and b) the proximal outer body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for adjusting the length of an intramedullary nail, comprising:
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placing an actuator about a patient'"'"'s limb such that an outer magnet of the actuator is disposed relative to an intramedullary nail located within the patients limb, the intramedullary nail including first and second bodies configured for relative axial movement and an inner magnet; and rotating the outer magnet to impart rotation to the inner magnet that results in relative axial movement of the first and second bodies to adjust the length of the intramedullary nail. - View Dependent Claims (13, 14, 15)
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16. An actuator, comprising:
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at least two magnets; and a linkage coupling the at least two magnets and configured to impart rotation to the first and second outer magnets in the same direction; and a user interface that displays the magnitude of axial distraction or axial compaction of an intramedullary nail caused by rotation of the magnets. - View Dependent Claims (17, 18, 19, 20)
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21. An actuator, comprising:
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at least one magnet having an axis oriented to be non-parallel to an axis of an intramedullary nail, the magnet being configured for rotation about the magnet axis; and a user interface that displays the magnitude of axial distraction or axial compaction of an intramedullary nail caused by rotation of the magnet. - View Dependent Claims (22, 23)
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Specification