Delivery device

Patent metadata

Field	Value
Publication number	US-9149379-B2
Application number	US-87917607-A
Country	US
Kind code	B2
Filing date	Jul 16, 2007
Priority date	Jul 16, 2007
Publication date	Oct 6, 2015
Grant date	Oct 6, 2015

Abstract

A delivery device for deploying an expandable prosthesis and method of use thereof are described. The delivery device comprises an outer catheter that is capable of retracting in a proximal direction and resheathing over the prosthesis in a distal direction. The device comprises a drive pulley that can engage a particular gear set to retract the outer catheter and expose the prosthesis. The drive pulley can also engage another gear set to resheath the outer catheter and recapture the prosthesis between the inner and the outer catheter. A directional switch enables the device to operate between the two modes.

First claim

The invention claimed is:

1. An apparatus for delivering an intraluminal device, comprising:
a gear and pulley mechanism comprising a first gear set and a second gear set;
a drive pulley adapted to be alternatively mechanically coupled to the first gear set and the second gear set; and
a sheath disposed over an inner elongate member, the sheath being in mechanical communication with the drive pulley and adapted to retract in a proximal direction and resheath in a distal direction,
wherein the drive pulley is configured to be mechanically coupled to the second gear set to move the sheath in a proximal direction relative to the inner elongate member to enable at least partial deployment of the intraluminal device,
wherein the drive pulley is configured to be mechanically coupled to the first gear set to move the sheath in the distal direction relative to the inner elongate member to enable resheathing of a partially deployed intraluminal device, and
further comprising a trigger, the trigger comprising a generally straight rack, the rack being translatable and adapted to engage with a main drive gear, the main drive gear being affixed to a drive shaft, wherein the first gear set comprises a first drive gear and the second gear set comprises a second drive gear, the first drive gear and the second drive gear each comprising one-directional roller clutch bearings, the drive shaft extending through the roller clutch bearings and mechanically coupled thereto, wherein the first drive gear engages a first idle gear, and the first idle gear engages a first pulley gear, wherein the second drive gear engages a second pulley gear, the first pulley gear and the second pulley gear being adapted to rotate in opposite directions in response to translation of the rack, the drive pulley being adapted to be alternatively mechanically coupled to the first pulley gear and the second pulley gear, and
further wherein a pulley shaft extends through each of the first pulley gear, the second pulley gear, and the drive pulley, the first pulley gear and the second pulley gear each being translatable relative to the drive pulley along an axis of the pulley shaft, wherein a first directional switch is aligned with the axis of the pulley shaft and coupled to the first pulley gear, the first directional switch being adapted to simultaneously move the first pulley gear into engagement with the drive pulley and the second pulley gear out of engagement with the drive pulley, and wherein a second directional switch is aligned with the axis of the pulley shaft and coupled to the second pulley gear, the second directional switch being adapted to simultaneously move the second pulley gear into engagement with the drive pulley and the first pulley gear out of engagement with the drive pulley.

2. The apparatus of claim 1 , wherein the sheath is capable of resheathing the intraluminal device after being up to about 95% deployed.

3. The apparatus of claim 1 , further comprising a stabilizing element extending along a longitudinal axis of the inner elongate member and the sheath, the stabilizing element fixating the position of the intraluminal device during movement of the sheath relative to the inner elongate member.

4. The apparatus of claim 3 , wherein the stabilizing element is a retaining wire configured to be mechanically engaged with the intraluminal device, the retaining wire being proximally movable to disengage from the intraluminal device.

5. The apparatus of claim 1 , wherein a belt is wound around the drive pulley and coupled to the sheath.

6. The apparatus of claim 5 , further comprising a shuttle fixedly connected to a straight length of the belt and fixedly connected to the sheath, the belt thereby translating longitudinal movement to the sheath along the straight length of the belt as the belt is driven by the drive pulley.

7. The apparatus of claim 6 , wherein the belt comprises a first set of teeth adapted to engage with a second set of teeth of the shuttle.

8. The apparatus of claim 6 , wherein the shuttle comprises an opening receiving the inner elongate member therethrough, the inner elongate member extending towards a proximal end of the apparatus, the inner elongate member being fixedly connected to the proximal end of the apparatus.

9. The apparatus of claim 8 , wherein a proximal end of the inner elongate member comprises a luer fitting, a lumen extending through each of the luer fitting and the inner elongate member.

10. The apparatus of claim 1 , wherein the first pulley gear and the second pulley gear are each slidable along the pulley shaft to engage and disengage with the drive pulley.

11. The apparatus of claim 1 , the sheath being coupled to a belt, the belt being wound around at least 180 degrees of the drive pulley to prevent substantial slippage there between.

12. The apparatus of claim 11 , wherein the belt comprises teeth that engage teeth of the drive pulley.

13. The apparatus of claim 11 , further comprising two idlers, the two idlers being disposed on opposite sides of the drive pulley and configured to wrap the belt around the drive pulley.

14. An apparatus for delivering an intraluminal device, comprising:
a gear and pulley mechanism comprising a first gear set and a second gear set, the first gear set and the second gear set each comprising a plurality of gears rotatable about parallel axes;
an inner elongate member, the inner elongate member being fixed at a proximal end to a handle assembly;
an outer elongate sheath disposed over the inner elongate member, the outer elongate sheath being coupled to a belt wound around a drive pulley, the outer elongate sheath adapted to be actuated by the first gear set rotating the drive pulley in a first rotational direction so as to move the elongate outer sheath in a distal direction relative to the inner elongate member, the outer elongate sheath being adapted to be actuated by the second gear set rotating the drive pulley in a second rotational direction opposite the first rotational direction so as to move the elongate outer sheath in a proximal direction relative to the inner elongate member; and
a stabilizing element extending along a longitudinal axis of the inner elongate member and the outer elongate sheath for fixating the position of the intraluminal device during movement of the outer elongate sheath relative to the inner elongate member, wherein the stabilizing element is an elongate retaining wire configured to be mechanically engaged with the intraluminal device, the retaining wire passing through a proximal crown of the intraluminal device, the retaining wire being proximally movable to disengage from the proximal crown of the intraluminal device;
wherein the first gear set comprises an idle gear, the idle gear mechanically coupled to a first pulley gear;
wherein the second gear set comprises a second drive gear mechanically coupled to a second pulley gear; and
wherein the drive pulley is adapted to be alternatively mechanically coupled to the first pulley gear and the second pulley gear, wherein a pulley shaft extends through each of the first pulley gear, the second pulley gear, and the drive pulley, the first pulley gear and the second pulley gear each being translatable relative to the drive pulley along an axis of the pulley shaft, wherein a first directional switch is aligned with the axis of the pulley shaft and coupled to the first pulley gear, the first directional switch being adapted to simultaneously move the first pulley gear into engagement with the drive pulley and the second pulley clear out of engagement with the drive pulley, and wherein a second directional switch is

Assignees

• Keady Fionan
• O'Sullivan Donagh
• Cook Medical Technologies Llc

Inventors

• Keady Fionan
• O'Sullivan Donagh

Classifications

• A61F2002/9534

  for repositioning of stents · CPC title

• F16H19/06

  comprising {flexible members, e.g. an} endless flexible member · CPC title

• A61F2/9517

  handle assemblies therefor · CPC title

• F16H2019/0681

  the flexible member forming a closed loop · CPC title

• A61F2002/9528

  for retrieval of stents · CPC title