Trajectory guide
First Claim
Patent Images
1. A trajectory guide comprising:
- a first clamp member spaced from a second clamp member;
a guide body pivotably connected to the first and second clamp members and defining a guiding surface and a brake surface, the brake surface disposed between the first clamp member and the second clamp member, wherein at least one of the first clamp member and the brake surface defines a convex surface engaged against the other of the first clamp member and the brake surface, wherein the first clamp member and the brake surface diverge from a first end toward a second end and the first clamp member rolls against the brake surface along the convex surface;
a clamp disposed proximate the second end and configured to urge the first clamp member and the second clamp member together at the second end against the brake surface of the guide body and thereby lock the guide body in a selected position; and
a first engagement surface associated with the first clamp member and a second engagement surface associated with the second clamp member, each engagement surface disposed proximate the first end;
wherein the first engagement surface separates from the second engagement surface and the first clamp member is simultaneously clamped against the brake surface at the convex surface to lock the guide body in response to the clamp urging the first clamp member and the second clamp member together at the second end.
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Abstract
A trajectory guide includes a guide body defining a selected trajectory through an entry aperture or opening, engagement surfaces for insertion into the entry aperture, and a fixing mechanism coupling the guide body with the engagement surfaces. The engagement surfaces may be easily fixed within an entry aperture and the guide body positioned in a selected orientation using the fixing mechanism to provide simple mounting of the trajectory guide. In some instances, the engagement surfaces may be fixed within the entry aperture and the guide body fixed in a selected orientation with a single fixation motion.
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Citations
46 Claims
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1. A trajectory guide comprising:
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a first clamp member spaced from a second clamp member; a guide body pivotably connected to the first and second clamp members and defining a guiding surface and a brake surface, the brake surface disposed between the first clamp member and the second clamp member, wherein at least one of the first clamp member and the brake surface defines a convex surface engaged against the other of the first clamp member and the brake surface, wherein the first clamp member and the brake surface diverge from a first end toward a second end and the first clamp member rolls against the brake surface along the convex surface; a clamp disposed proximate the second end and configured to urge the first clamp member and the second clamp member together at the second end against the brake surface of the guide body and thereby lock the guide body in a selected position; and a first engagement surface associated with the first clamp member and a second engagement surface associated with the second clamp member, each engagement surface disposed proximate the first end; wherein the first engagement surface separates from the second engagement surface and the first clamp member is simultaneously clamped against the brake surface at the convex surface to lock the guide body in response to the clamp urging the first clamp member and the second clamp member together at the second end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A surgical trajectory guide comprising:
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means for adjustably defining a trajectory; means for releasably locking the defining means; and means for lockingly engaging a surface that defines an entry aperture; wherein the locking means comprises a fulcrum defined between two opposed braking surfaces, a setting mechanism for urging the two opposed engaging surfaces together, and a retention means for restraining separation of the engaging means disposed between the fulcrum and the engaging means, wherein the locking means simultaneously locks the defining means in a selected position and urges the engaging means toward the surface by clamping the two opposed braking surfaces against each other at the fulcrum in coordination with the retention means. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method of securing a surgical trajectory guide to a patient in a fixed orientation, the trajectory guide comprising a guide carried by a body and a fixation mechanism, the guide being angularly adjustable with respect to the body and lockable by the fixation mechanism, the method comprising:
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inserting a first end of the body into an entry aperture in a skeletal member of the patient; selecting an angular orientation of the body with respect to the entry aperture; selecting an angular orientation of the guide with respect to the body; and simultaneously fixing the body in the selected rotational orientation within the entry aperture and locking the guide in the selected angular orientation with the fixation mechanism by clamping the body against the guide to prevent angular adjustment of the guide with respect to the body and simultaneously urging, the first end of the body apart against an inner periphery of the aperture. - View Dependent Claims (36, 37, 38, 39, 40)
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41. A surgical trajectory guide comprising:
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a guide body defining a guide surface, wherein the guide surface comprises a bore through the guide body; a first engagement member and a second engagement member, the engagement members being associated with the guide body and adapted to be received within an entry aperture in a surgical patient, wherein at least one of the engagement members includes gripping projections on an outer surface thereof; and a fixing mechanism associated with the engagement members, wherein the fixing mechanism comprises a fulcrum defined by the guide body and engaged against the first engagement member; wherein the fixing mechanism squeezes the first engagement member against the fulcrum of the guide body and moves the first engagement member away from the second engagement member by rolling over the fulcrum, whereby the gripping projections of the engagement members may be forced against an inside periphery of the entry aperture to securely angularly fix the surgical trajectory guide to the surgical patient, and whereby the bore defines a trajectory into the entry aperture from an exterior. - View Dependent Claims (42, 43, 44, 45, 46)
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Specification