Marking device with retractable cannula
First Claim
1. A marking device, comprising:
- a handle having a handle proximal end and a handle distal end and defining a hollow interior;
a cannula having a cannula distal region that includes a cannula distal end having a distal opening, the cannula being configured for slidable movement between an extended position where the cannula distal end having the distal opening extends beyond the handle distal end and a retracted position where the cannula distal end having the distal opening is received within the hollow interior;
a stylet having a stylet distal region that includes a stylet distal end, the stylet being configured for slidable movement between a ready position where the stylet distal end is proximal of the cannula distal end to form a marker recess in the cannula between the cannula distal end and the stylet distal end and an implant position where the stylet distal end extends into the marker recess to at least the distal opening in the cannula distal end;
an imaging marker located within the marker recess; and
an actuator having a cannula mount and a stylet mount, the stylet mount configured to slidably support the stylet in the handle and the cannula mount configured to slidably support the cannula in the handle, the actuator configured to define an initial condition wherein the cannula is in the extended position and the stylet is in the retracted position in the extended cannula, wherein starting from the initial condition with the cannula in the extended position, the actuator being configured to sequentially effect movement of the stylet from the ready position to the implant position to eject the imaging marker from the marker recess through the distal opening and to secure the cannula mount and a stylet mount together such that the stylet mount is fixed to the cannula mount so as to operably couple the stylet and the cannula together when the stylet is moved to the implant position, and then effect a simultaneous unitary retraction of the cannula mount, the cannula, the stylet mount, and the stylet after ejection of the imaging marker from the distal opening in the cannula distal end.
3 Assignments
0 Petitions
Accused Products
Abstract
A marking device according to one embodiment of the invention comprises a handle, a cannula having a cannula distal end and slidably mounted to the handle, and a stylet having a stylet distal end and slidably mounted to the handle in the cannula. The stylet distal end is spaced proximally of the cannula distal end to form a marker recess that receives an imaging marker. The marking device further comprises an actuator operably coupled to the cannula to effect retraction of the cannula into the handle following implantation of the imaging marker. The imaging marker can be implanted by advancing the stylet relative to the cannula to eject the imaging marker from the marker recess, or the cannula can be retracted relative to the stylet to expose the imaging marker.
594 Citations
15 Claims
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1. A marking device, comprising:
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a handle having a handle proximal end and a handle distal end and defining a hollow interior; a cannula having a cannula distal region that includes a cannula distal end having a distal opening, the cannula being configured for slidable movement between an extended position where the cannula distal end having the distal opening extends beyond the handle distal end and a retracted position where the cannula distal end having the distal opening is received within the hollow interior; a stylet having a stylet distal region that includes a stylet distal end, the stylet being configured for slidable movement between a ready position where the stylet distal end is proximal of the cannula distal end to form a marker recess in the cannula between the cannula distal end and the stylet distal end and an implant position where the stylet distal end extends into the marker recess to at least the distal opening in the cannula distal end; an imaging marker located within the marker recess; and an actuator having a cannula mount and a stylet mount, the stylet mount configured to slidably support the stylet in the handle and the cannula mount configured to slidably support the cannula in the handle, the actuator configured to define an initial condition wherein the cannula is in the extended position and the stylet is in the retracted position in the extended cannula, wherein starting from the initial condition with the cannula in the extended position, the actuator being configured to sequentially effect movement of the stylet from the ready position to the implant position to eject the imaging marker from the marker recess through the distal opening and to secure the cannula mount and a stylet mount together such that the stylet mount is fixed to the cannula mount so as to operably couple the stylet and the cannula together when the stylet is moved to the implant position, and then effect a simultaneous unitary retraction of the cannula mount, the cannula, the stylet mount, and the stylet after ejection of the imaging marker from the distal opening in the cannula distal end. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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2. A marking device, comprising:
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a handle having a handle proximal end and a handle distal end and defining a hollow interior; a cannula having a cannula distal end defining an opening and having a cannula distal tip, the cannula slidably mounted to the handle, the cannula being configured for slidable movement between an extended position where the cannula distal tip extends beyond the handle distal end and a retracted position where an entirety of the cannula is received within the hollow interior; a stylet having a stylet distal end and slidably mounted to the handle, and the stylet being configured for slidable movement between a ready position where the stylet distal end is proximal of the cannula distal end to form a marker recess in the cannula between the cannula distal end and the stylet distal end and an implant position where the stylet distal end extends into the marker recess to at least the opening in the cannula distal end; an imaging marker located within the marker recess; and an actuator operably coupled to the stylet and the cannula, the actuator configured to define an implant condition wherein the cannula is in the extended position and the stylet is in the implant position, wherein in a sequence beginning from the implant condition, the actuator configured to effect simultaneous retraction of the cannula and the stylet in unison to position both the cannula distal end defining the opening and the stylet distal end within the hollow interior of the handle.
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13. A marking device comprising:
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a handle having a handle proximal end and a handle distal end and defining a hollow interior; a cannula having a cannula distal end and a cannula distal tip, the cannula slidably mounted to the handle, the cannula being configured for slidable movement between an extended position where the cannula distal tip extends beyond the handle distal end and a retracted position where the cannula distal tip is received within the hollow interior; a stylet having a stylet distal end located in the cannula proximal of the cannula distal end to form a marker recess in the cannula between the cannula distal end and the stylet distal end, the stylet having an implant position wherein the stylet distal end extends from the cannula distal end; an imaging marker located within the marker recess; and an actuator operably coupled to the stylet and the cannula, the actuator configured to define an implant condition wherein the cannula is in the extended position and the stylet is in the implant position, wherein in a sequence beginning from the implant condition, the actuator configured to effect simultaneous retraction of the cannula and the stylet in unison to position an entirety of both the cannula and the stylet within the hollow interior of the handle. - View Dependent Claims (14, 15)
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Specification