QUICK RELEASE DEPLOYMENT HANDLE FOR MEDICAL DEVICES

• US 20140277349A1
• Filed: 03/12/2014
• Published: 09/18/2014
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Inventors: Vad, Siddharth
• Granted Patent: US 9,827,121 B2
• Time in Patent Office: Days
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2002/9665 with additional retaining means

Abstract

A deployment handle for an expandable medical device, a handle having a proximal end, a distal end, and a lumen/passageway extending between the proximal and distal ends; an inner cannula; and a tension mechanism located inside the handle and secured to the inner cannula so that the inner cannula rotates when the tension mechanism is actuated.

Claims

1-20. -20. (canceled)

21. A deployment handle assembly for a stent graft delivery device comprising:

a tubular handle having a proximal end and a distal end and a lumen extending longitudinally therebetween;

an inner cannula having a proximal end and a distal end, and wherein at least a portion of the distal end of inner cannula extends longitudinally through handle lumen;

a stent graft carried on the proximal end of the inner cannula;

a torsion mechanism proximal the distal end of the inner cannula, the torsion mechanism configured to impart axial rotation of the inner cannula relative to the handle;

an actuation mechanism positioned at the distal end of the handle, the actuation mechanism having a first position in which the actuation mechanism is engaged with the inner cannula to prevent axial rotation of the inner cannula and a second position in which the actuation mechanism is disengaged from the inner cannula to permit axial rotation of the inner cannula relative to the handle;

wherein the axial rotation of the inner cannula permits release of at least a portion of the stent graft from the delivery device.

22. The deployment handle of claim 21 wherein the torsion mechanism comprises a coiled element.

23. The deployment handle of claim 21 wherein the actuation mechanism comprises at least one of a pin, rod, wing nut, screw and spring.

24. The deployment handle of claim 21 wherein the actuation mechanism further includes a safety mechanism preventing the actuation mechanism from inadvertently disengaging from the inner cannufa to prevent inadvertent axial rotation of the inner cannula.

25. The deployment handle of claim 24 wherein the safety mechanism comprises a linear member releaseably engageable with the distal end of the handle, the safety mechanism configured to prevent inadvertent rotation of actuation mechanism.

26. The deployment handle of claim 21 wherein the torsion mechanism is axially rotated relative to the handle to impart tension in the torsion mechanism.

27. The deployment handle of claim 26 wherein tension in the torsion mechanism is maintained when the actuation mechanism is in the first position engaged with the inner cannula.

28. The deployment handle of claim 27 further comprising a slideable lever having a first position which maintains the actuation mechanism in its first position engaged with the inner cannula thereby maintaining the tension in the tension mechanism.

29. The deployment handle of claim 28 wherein the slideable lever is moveable to a second position, and wherein movement of the lever to the second position operable to release tension in the tension mechanism, resulting in axial rotation of inner cannula.

30. The deployment handle of claim 21 further comprising an outer cannula disposed about an outer surface of the inner cannula, wherein the outer cannula is axially rotatable relative to the inner cannula.

31. The deployment handle of claim 21 wherein the handle further comprises a trigger wire pusher slideably disposed at least partially within the lumen of the handle, the trigger wire pusher having a proximal end, a distal end, and a lumen extending between the proximal and distal ends;

and a

32. The deployment handle of claim 31 further comprising a trigger wire knob disposed distally of the distal end of the trigger wire pusher, wherein the trigger wire knob is longitudinally slideable within the lumen of handle between a first proximal position and a second distal position;

and at least one trigger wire having a proximal end attached to stent graft and a distal end attached to the trigger wire knob.

33. The deployment handle of claim 32 wherein movement of the trigger wire knob from the first position to the second position moves the trigger wire distally.

34. The deployment handle of claim 32 wherein the proximal end of the trigger wire disengages from stent graft when trigger wire knob is in the second distal position, thereby releasing at least a portion of stent graft from the delivery device.

35. A method for deploying an expandable medical device, the method comprising:

providing a handle, wherein the handle comprises a proximal end and a distal end and a lumen extending longitudinally therebetween;

an inner cannula having a proximal end and a distal end, and wherein at least a portion of the distal end of inner cannula extends longitudinally through handle lumen;

a torsion mechanism at the distal end of the inner cannula, the torsion mechanism configured to impart axial rotation of the inner cannula relative to the handle;

an actuation mechanism positioned at the distal end of the handle, the actuation mechanism having a first position in which the actuation mechanism is engaged with inner cannula to prevent axial rotation of the inner cannula and a second position in which the actuation mechanism is disengaged from inner cannula to permit axial rotation of the inner cannula relative to the handle,

actuating the actuation mechanism from a first position to a second position to permit axial rotation of the inner cannula; and

releasing at least a portion of an expandable medical device carried on the proximal end of the inner cannula.

36. The method of claim 35 wherein the handle further comprises a trigger wire pusher that is located partially inside the handle lumen, wherein a proximal portion of a trigger wire is releasably engaged with the expandable medical device and a distal portion of the trigger wire is configured to engage the trigger wire pusher, the method further comprising retracting the trigger wire pusher in a distal direction thereby releasing the proximal portion of the trigger wire from the expandable medical device.

37. The method of claim 35 wherein the handle further comprises an outer cannula disposed about an outer surface of the inner cannula and wherein the actuation mechanism is engaged with the outer cannula, the method further comprising actuating the actuation mechanism from a first position to a second position to permit axial rotation of the outer cannula thereby releasing at least a portion of an expandable medical device carried on the proximal end of the outer cannula.

38. The method of claim 35 wherein the handle further comprises safety mechanism configured to prevent the actuation mechanism from inadvertently disengaging from the inner cannula thereby preventing inadvertent axial rotation of the inner cannula, the method further comprising removing the safety mechanism prior to actuating the actuation mechansim.

39. The method of claim 35 wherein the expandable medical device is a stent graft.