RATCHET-SLIDE HANDLE AND SYSTEM FOR FIDUCIAL DEPLOYMENT
First Claim
1. A ratcheted handle for a fiducial deployment system comprising:
- a fiducial deployment needle configured to retain and to distally deploy, in a controlled serial manner, a plurality of fiducials;
an advancement mechanism for said fiducial deployment, the advancement mechanism comprising;
an elongate handle member defining a central longitudinal axis;
a stylet disposed longitudinally through the needle, extending proximally into the handle member;
a central rack member affixed to the stylet and longitudinally movable in the handle, the central rack member including a plurality of laterally-protruding teeth; and
at least one tooth-engagement actuation memberdisposed movably through a wall of the handle member andengaged into contact with at least one tooth of the rack.
3 Assignments
0 Petitions
Accused Products
Abstract
Embodiments include a fiducial deployment system with a handle configured for actuation of same. A fiducial may include one or more protuberances configured to engage one or more slots in a needle of the system. The needle may be configured to deliver a plurality of fiducials to a target location in serial fashion, one at a time. In certain embodiments, echogenic placement of fiducials may present certain advantages. The handle includes an actuation mechanism with a toothed rack and actuation member(s) configured for incrementally or otherwise controlledly deploying one or more fiducials at a time by advancing a stylet through and/or retracting the body of a slotted needle in which fiducials are disposed with a fiducial protrusion extending into the needle slot, which also includes retaining structures that do not impede the needle lumen.
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Citations
20 Claims
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1. A ratcheted handle for a fiducial deployment system comprising:
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a fiducial deployment needle configured to retain and to distally deploy, in a controlled serial manner, a plurality of fiducials; an advancement mechanism for said fiducial deployment, the advancement mechanism comprising; an elongate handle member defining a central longitudinal axis; a stylet disposed longitudinally through the needle, extending proximally into the handle member; a central rack member affixed to the stylet and longitudinally movable in the handle, the central rack member including a plurality of laterally-protruding teeth; and at least one tooth-engagement actuation member disposed movably through a wall of the handle member and engaged into contact with at least one tooth of the rack. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A medical device handle configured for controlled incremental lengthwise stylet advancement through a cannula such as a fiducial needle, the handle comprising:
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an elongate outer handle body defining a longitudinal handle lumen; an elongate cannula attached directly or indirectly to a distal end of the handle body, the cannula defining a longitudinal cannula lumen in mechanical communication with the handle lumen; a rack member, including a plurality of longitudinally-aligned protruding teeth, where the rack member is disposed—
and is distally spring-biased—
within the handle lumen;a stylet extending distally from the rack member into the cannula lumen; and at least one actuation member with a portion of the actuation member engaging against one of or between two or more of the plurality of teeth, where actuating of the actuation member by moving it transversely against, and/or longitudinally relative to, the teeth is effective to move the rack distally by a predetermined increment.
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Specification