HANDLE FOR STEPWISE DEPLOYMENT
First Claim
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1. A deployment system for deploying a prosthesis in a duct, comprising:
- an elongate core cylinder for delivering a prosthesis to a predetermined location in the duct;
a prosthesis surrounding the core cylinder;
a sheath surrounding the prosthesis; and
a handle for deploying the prosthesis, the handle comprising;
a base member connected to the core cylinder, the base member having an elongate axis;
a slide member operably connected to the sheath, the slide member being moveable in relation to the base member, whereby, when the slide member is moved in relation to the base member, the sheath is moved in relation to the prosthesis;
an elongate gear rod defining a plurality of serrations, each serration being of equal length, the gear rod being attached to the slide member; and
an activation element pivotally connected to the base member, and a driving element extending from the activation element,wherein, pivotal depression of the activation element causes the driving element to engage one of the serrations on the gear rod and to move the gear rod proximally in relation to the base member, thereby incrementally retracting the sheath from the prosthesis; and
furtherwherein, the activation element is dimensionally configured in relation to the base member and the gear rod such that proximal movement of the gear rod caused by a single depression of the activation element cannot exceed the length of a single serration.
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Abstract
A system for controlled deployment of a prosthesis, in which a sheath is retracted from a prosthesis in a body vessel or duct. The system includes a handle for deploying the prosthesis, the handle comprises a base member fixed to a catheter, and a slide member for sliding past the base member, the slide member being fixed to an end of a retraction member. The slide member includes a serrated gear rod, and the handle is configured such that, when activated, the gear rod moves in relation to the base member by no more nor less than the length of one serration on the gear rod.
60 Citations
25 Claims
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1. A deployment system for deploying a prosthesis in a duct, comprising:
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an elongate core cylinder for delivering a prosthesis to a predetermined location in the duct; a prosthesis surrounding the core cylinder; a sheath surrounding the prosthesis; and a handle for deploying the prosthesis, the handle comprising; a base member connected to the core cylinder, the base member having an elongate axis; a slide member operably connected to the sheath, the slide member being moveable in relation to the base member, whereby, when the slide member is moved in relation to the base member, the sheath is moved in relation to the prosthesis; an elongate gear rod defining a plurality of serrations, each serration being of equal length, the gear rod being attached to the slide member; and an activation element pivotally connected to the base member, and a driving element extending from the activation element, wherein, pivotal depression of the activation element causes the driving element to engage one of the serrations on the gear rod and to move the gear rod proximally in relation to the base member, thereby incrementally retracting the sheath from the prosthesis; and
furtherwherein, the activation element is dimensionally configured in relation to the base member and the gear rod such that proximal movement of the gear rod caused by a single depression of the activation element cannot exceed the length of a single serration. - View Dependent Claims (2, 7, 8, 9, 10, 11, 12)
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- 3. The deployment system of claim 3, wherein the locking element extends substantially perpendicular to the gear rod.
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13. A deployment system for deploying a prosthesis in a duct, comprising:
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an elongate catheter for delivering a prosthesis to a predetermined location in the duct; a prosthesis surrounding the catheter; a sheath surrounding the prosthesis; and a handle for deploying the prosthesis, the handle comprising; a cylinder operably connected to the catheter; a piston operably connected to the sheath, the piston being moveable in relation to the cylinder, whereby, when the piston is moved proximally in relation to the cylinder, the sheath is withdrawn from the prosthesis; an elongate gear rod defining a plurality of serrations, each serration being of equal length, the gear rod being attached to the piston; and a button pivotally connected to the base member; a leaf spring having first and second ends, the leaf spring being connected at the first end to the cylinder and being in contact with the button at the second end, the leaf spring being configured to urge the button to an equilibrium position; wherein, pivotal depression of the button inward from the equilibrium position engages the gear rod and moves the gear rod proximally in relation to the cylinder, thereby incrementally retracting the sheath from the prosthesis. - View Dependent Claims (14, 15, 16)
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17. A deployment system for deploying a prosthesis in a duct, comprising:
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an elongate catheter for delivering a prosthesis to a predetermined location in the duct; a prosthesis surrounding the catheter; a sheath surrounding the prosthesis; and a handle for deploying the prosthesis, the handle comprising; a cylinder operably connected to the catheter; a piston operably connected to the sheath, the piston being moveable in relation to the cylinder, whereby, when the piston is moved proximally in relation to the cylinder, the sheath is withdrawn from the prosthesis; a button pivotally connected to the base member, the button being in contact with a biasing means for biasing the button to an equilibrium position; means for controlling distal movement of the piston in relation to the cylinder, whereby said means for controlling permits the piston to move proximally in relation to the cylinder in a series of incremental displacements in which a succeeding incremental displacement is not capable of being unequal to a preceding incremental displacement. - View Dependent Claims (18)
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19. A method of retracting a sheath to uncover a prosthesis mounted on a catheter, comprising:
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operably attaching the catheter to a base member having a first elongate axis, the base member being positioned proximal to the catheter; operably attaching the sheath to a slide member having a second elongate axis, the slide member being slideable parallel to the first axis; repeatedly depressing an activation element that is pivotally attached to the base member; causing the slide member to move proximally, by no more than the length of a single serration on a gear rod attached to the slide member, with each depression of the activation element; and withdrawing the activation element to an equilibrium position after each depression; whereby, the sheath is incrementally moved proximally to uncover the prosthesis. - View Dependent Claims (20, 21, 22)
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23. A method of retracting a sheath to uncover a prosthesis mounted on a catheter, comprising:
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operably attaching the catheter to a cylinder; operably attaching the sheath to a piston, the piston being slideable within the cylinder; repeatedly depressing a button that is pivotally attached to the cylinder; causing the piston to move proximally with each depression of the button in a series of incremental movements, wherein each succeeding incremental movement is equal to each preceding movement; - View Dependent Claims (24, 25)
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Specification