Screw-driven handles and systems for fiducial deployment

Patent metadata

Field	Value
Publication number	US-9770262-B2
Application number	US-201514712524-A
Country	US
Kind code	B2
Filing date	May 14, 2015
Priority date	Jun 9, 2014
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

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 rotatable housing portion or member configured for incrementally or otherwise controlledly deploy 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.

First claim

We claim:

1. A screw-driven handle for a fiducial deployment system including a fiducial deployment needle extending distally from the screw-driven handle and retaining for distal deployment in a controlled serial manner a plurality of fiducials, the fiducial deployment needle including a single lumen; where the screw-driven handle comprises:
an advancement mechanism for said fiducial deployment system, the advancement mechanism comprising:
an elongate handle member defining a central longitudinal axis and a handle lumen;
an elongate rotatable housing member that encloses a portion of the elongate handle member and defining an inner wall having helical housing threads;
a screw member disposed in the elongate rotatable housing member and defining an outer wall having helical screw threads; and
a stylet disposed longitudinally through the single lumen of the fiducial deployment needle, extending proximally through the handle lumen and at least a portion of the elongate rotatable housing member, wherein the stylet is affixed to the screw member, and further comprising a guide bar, wherein the guide bar and the stylet are longitudinally slidable relative to the elongate handle member.

2. The screw-driven handle of claim 1 , wherein the guide bar is formed on and extends in a distal direction from the screw member and extending proximally through at least a portion of the handle member, wherein the guide bar prevents rotation of the screw member relative to the stylet and prevents rotation of both the screw member and the stylet relative to the fiducial deployment needle.

3. The screw-driven handle of claim 1 , wherein the screw member is longitudinally movable in a housing lumen of the elongate rotatable housing member.

4. The screw-driven handle of claim 3 , wherein the screw member advances or withdraws longitudinally within the housing lumen when rotational force is applied to the elongate rotatable housing member as the elongate rotatable housing member's inner wall having helical housing threads interacts with the screw member's outer wall having helical screw threads.

5. The screw-driven handle of claim 4 , wherein a single full rotation of the elongate rotatable housing member effects distal movement of the stylet by a distance corresponding to a distal-needle-end deployment of a predetermined number of the plurality of fiducials.

6. The screw-driven handle of claim 1 , further comprising a connector plate formed at a proximal end of the elongate handle member.

7. The screw-driven handle of claim 6 , wherein the elongate rotatable housing member further defines a recessed portion formed on the inner wall.

8. The screw-driven handle of claim 7 , wherein the connector plate is held in place by the recessed portion formed on the inner wall of the elongate rotatable housing member.

9. The screw-driven handle of claim 1 , wherein the elongate handle member extends longitudinally through at least a portion of the elongate rotatable housing member.

10. The screw-driven handle of claim 1 , wherein the elongate handle member further defines a laterally protruding handle portion at a proximal end of the elongate handle member.

11. The screw-driven handle of claim 10 , wherein the elongate rotatable housing member further defines a laterally protruding housing portion at the distal end of the housing member.

12. The screw-driven handle of claim 11 , wherein the elongate rotatable housing member is rotatably engaged to the handle member by the laterally protruding housing portion engaging with the laterally protruding handle portion.

13. A medical device handle configured for controlled lengthwise stylet advancement through a cannula, the medical device handle comprising:
an elongate handle body defining a longitudinal handle lumen;
an elongate cannula attached directly or indirectly to a proximal end portion of the elongate handle body, the elongate cannula defining a longitudinal cannula lumen in mechanical communication with the longitudinal handle lumen;
a rotatable elongate housing body defining a longitudinal housing lumen, the elongate housing body enclosing a portion of the elongate handle body;
a threaded screw member disposed within the longitudinal housing lumen; and
a stylet extending distally from the threaded screw member into the longitudinal cannula lumen, configured such that rotation of the elongate housing body effects a longitudinal movement of the threaded screw member and the stylet relative to the longitudinal housing lumen and the longitudinal handle lumen, and further comprising a guide bar, wherein the guide bar and the stylet are longitudinally slidable relative to the elongate handle member.

14. The medical device handle of claim 13 , wherein a 360-degree rotation of the elongate housing body is effective to move the stylet distally by a predetermined increment corresponding to the deployment of a predetermined number of fiducials from a distal end of the elongate cannula.

15. The medical device handle of claim 13 , further comprising a connector portion formed at the proximal end of the elongate handle body.

16. The medical device handle of claim 15 , wherein the elongate cannula is attached to the connector portion.

17. The medical device handle of claim 13 , wherein the elongate handle body further defines a longitudinally protruding connector portion as an integral portion of the elongate handle body.

18. The medical device handle of claim 17 , wherein the elongate cannula is attached to the longitudinally protruding connector portion.

Assignees

• Cook Medical Technologies Llc

Inventors

• Clancy Michael
• Mcgrath Darach
• Campbell Triona
• Mulcahy Patrick
• Keady Fionan
• Toomey Ciaran

Classifications

• A61B2090/3987

  Applicators for implanting markers · CPC title

• A61B90/39

  Markers, e.g. radio-opaque or breast lesions markers · CPC title

• A61B2090/0807

  Indication means · CPC title

• A61B17/3468 Primary

  for implanting or removing devices, e.g. prostheses, implants, seeds, wires (devices for implanting seeds A61M37/0069) · CPC title

• A61B2090/0804

  Counting number of instruments used; Instrument detectors · CPC title