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US 10,206,690 B2Granted
Bone and tissue marker
AssigneeSmith & Nephew, Inc.
InventorPaul Alexander Torrie
Life of this patent
Estimating the term…
Abstract
The present invention concerns a marker for bones, particularly for marking irregularities in the femoral head. There is described a surgical instrument having a shaft including a handle towards a proximal end and an arm towards a distal end. The arm includes a template, and the arm and/or template further includes tissue marking means for marking differences in the curvature of a tissue surface.
Claims23
A surgical marking instrument comprising:
- a shaft having a proximal end, a distal end, and a longitudinal axis extending therebetween, a handle being coupled to the proximal end of the shaft;
- an arm pivotally connected towards a distal end of the shaft, the arm having first and second opposing surfaces and dimensioned to fit between a head and socket of a joint, the second surface of the arm comprising a curved template, a curvature of the template configured to engage a complementary surface of a normal curvature of the joint head, the template further defining a recess located towards a proximal end of the arm;
- a rod or wire attached to the proximal end of the arm for inducing rotation of the arm about the pivotal connection;
- and
- a radio frequency electrode fitted to the recess;
- wherein the arm is connected to the shaft closer to a midpoint between the proximal end and a distal end of the arm to allow the template to change orientation relative to the longitudinal axis of the shaft;
- wherein the template is further configured to allow a user to observe a difference in the normal curvature of the joint head defined by gaps between the template and an abnormal curvature of the joint head as the template is moved over the surface;
- and
- wherein, when the template encounters the difference in the normal curvature, the electrode is configured to mark a perimeter of the difference.
6 more elements
A surgical marking instrument comprising:
- a shaft having a proximal end, a distal end, and a longitudinal axis extending therebetween, a handle being coupled to the proximal end of the shaft;
- an arm pivotally connected towards a distal end of the shaft, the arm having first and second opposing surfaces and dimensioned to fit between a head and socket of a joint, the second surface of the arm comprising a curved template, a curvature of the template configured to engage a complementary surface of a normal curvature of the joint head, the template further defining a recess located towards the proximal end of the arm;
- a radio frequency electrode fitted to the recess;
- a hollow tubular member dimensioned to receive the shaft and adapted to move axially along the shaft, an opening of the tubular member being axially elongated between a distal end at a distal end of the tubular member and a proximal end disposed proximally of the arm;
- wherein the arm is connected to the shaft closer to a midpoint between proximal and distal ends of the arm to allow the template to change orientation relative to the longitudinal axis of the shaft;
- wherein the template is further configured to allow a user to observe a difference in the normal curvature of the joint head defined by gaps between the template and an abnormal curvature of the joint head as the template is moved over the surface;
- and
- wherein, when the template encounters the difference in the normal curvature, the electrode is configured to mark a perimeter of the difference.
5 more elements
Dependencies are inferred from the claim text.