Locking nail and stereotaxic apparatus therefor
First Claim
1. A stereotaxic apparatus for a locking nail comprising two oscillating circuits which are disposed in a recess in an outer surface of the nail along the longitudinal direction of the locking nail and spaced from a cross-bore in the nail, the apparatus having a guide sleeve to place a drill or bone screw which, when the stereotaxic apparatus is in an oriented condition, points to a cross-bore in the locking nail wherein the stereotactic apparatus has:
- three or more oscillating circuits are arranged in a first plane that are equidistant each from a first center located in said plane;
three or more oscillating circuits are arranged in a second plane extending in parallel with said first plane that are equidistant each from a second center located in said second plane;
wherein said first and second planes are arranged towards each other such that a face normal to one of the planes extends through said first and second centers; and
at least two oscillating circuits are arranged at a distance from a straight line extending through said centers and the interconnecting straight line of which, in the condition aligned with said locking nail, is substantially perpendicular to the longitudinal direction of said locking nail wherein an additional excitation coil is provided which emits a HF pulse for an excitation of the oscillating circuits in the locking nail.
5 Assignments
0 Petitions
Accused Products
Abstract
A stereotaxic apparatus for a locking nail which has two oscillating circuits which are disposed along the longitudinal direction of the locking nail. The apparatus has a guide sleeve to place a drill and/or bone screw which, when the stereotaxic apparatus is in an oriented condition, points to a cross-bore in the locking nail. The guide sleeve has three or more oscillating circuits arranged in a first plane that are equidistant each from a first center located in the plane; three or more oscillating circuits are arranged in a second plane extending in parallel with said first plane that are equidistant each from a second center located in said second plane. The first and second planes are arranged towards each other such that a face normal to one of said planes extends through the first and second centers. A pair of oscillating circuits are arranged at a distance from a straight line extending through the centers and the interconnecting straight line of which, in the aligned condition with the locking nail, is substantially perpendicular to the longitudinal direction of the locking nail.
-
Citations
22 Claims
-
1. A stereotaxic apparatus for a locking nail comprising two oscillating circuits which are disposed in a recess in an outer surface of the nail along the longitudinal direction of the locking nail and spaced from a cross-bore in the nail, the apparatus having a guide sleeve to place a drill or bone screw which, when the stereotaxic apparatus is in an oriented condition, points to a cross-bore in the locking nail wherein the stereotactic apparatus has:
-
three or more oscillating circuits are arranged in a first plane that are equidistant each from a first center located in said plane; three or more oscillating circuits are arranged in a second plane extending in parallel with said first plane that are equidistant each from a second center located in said second plane; wherein said first and second planes are arranged towards each other such that a face normal to one of the planes extends through said first and second centers; and at least two oscillating circuits are arranged at a distance from a straight line extending through said centers and the interconnecting straight line of which, in the condition aligned with said locking nail, is substantially perpendicular to the longitudinal direction of said locking nail wherein an additional excitation coil is provided which emits a HF pulse for an excitation of the oscillating circuits in the locking nail. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
- 19. A locking nail comprising a hollow shank having an outer bone contacting surface which has at least one cross-bore for the reception of a bone screw and a recess in the outer bone contacting surface of the bone nail shank the recess having an outwardly facing surface located radially closer to a central longitudinal axis of the nail than the outer bone contact surface, the recess spaced from the at least one cross-bore, two oscillating circuits having different resonant frequencies are mounted in the recess outwardly of the outermost surface thereof, the two oscillating circuits electrically connected in the recess in series, the oscillating circuits being oriented in said recess along parallel axis such that the main direction of radiation of the electromagnetic fields produced extend in parallel to each other, the oscillating circuits responding to a HF pulse into the locking nail by producing the parallel electromagnetic fields.
Specification