Control system for a stent delivery system
First Claim
1. A control system for controlling movement of a stent delivery system having a first shaft and a second shaft, the second shaft movable relative to the first shaft, the control system comprising:
- a housing having a chamber formed therein;
a first drive at least partially positioned and movable within the housing and operably connected to the first shaft, the first drive being movable in response to a change in pressure within the chamber, the first drive contacting a first portion of an interior wall of the housing and forming a first seal;
a second drive at least partially positioned and movable within the housing and operably connected to the second shaft, the second drive being movable in response to the change in pressure within the chamber, the second drive contacting a second portion of the interior wall of the housing and forming a second seal;
a pressure controller operably connected to the housing the pressure controller changing the pressure within the chamber to move the second drive relative to the first drive;
a first spring biasing the first drive; and
a second spring biasing the second drive;
wherein movement of the second drive relative to the first drive in a first direction causes the second shaft to move relative to the first shaft to expand a stent operably connected thereto and movement of the second drive relative to the first drive in a second direction causes the second shaft to move relative to the first shaft to reconstrain the stent from an expanded configuration to a constrained configuration.
3 Assignments
0 Petitions
Accused Products
Abstract
A control system for controlling movement of a stent delivery system, a stent delivery system and a method for controlling movement of a stent delivery system are provided. The control system includes a housing having a chamber formed therein, a first drive at least partially positioned within the housing and operably connected to the first shaft of the delivery system and a second drive at least partially positioned within the housing and operably connected to the second shaft. The control system also includes a pressure controller operably connected to the housing and configured to change the pressure within the chamber. The first drive and the second drives are movable in response to the pressure change within the chamber and movement of the second drive relative to the first drive causes the second shaft to move relative to the first shaft to expand or constrain a stent operably connected thereto.
20 Citations
15 Claims
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1. A control system for controlling movement of a stent delivery system having a first shaft and a second shaft, the second shaft movable relative to the first shaft, the control system comprising:
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a housing having a chamber formed therein; a first drive at least partially positioned and movable within the housing and operably connected to the first shaft, the first drive being movable in response to a change in pressure within the chamber, the first drive contacting a first portion of an interior wall of the housing and forming a first seal; a second drive at least partially positioned and movable within the housing and operably connected to the second shaft, the second drive being movable in response to the change in pressure within the chamber, the second drive contacting a second portion of the interior wall of the housing and forming a second seal; a pressure controller operably connected to the housing the pressure controller changing the pressure within the chamber to move the second drive relative to the first drive; a first spring biasing the first drive; and a second spring biasing the second drive; wherein movement of the second drive relative to the first drive in a first direction causes the second shaft to move relative to the first shaft to expand a stent operably connected thereto and movement of the second drive relative to the first drive in a second direction causes the second shaft to move relative to the first shaft to reconstrain the stent from an expanded configuration to a constrained configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A stent delivery system comprising:
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a first shaft; a second shaft, the second shaft movable relative to the first shaft and coaxially extending within the first shaft; a stent having a first end portion operably connected to the first shaft by a first constraining member and a second end portion operably connected to the second shaft by a second constraining member so that the first and second constraining members, in response to movement of the second shaft to the first shaft, apply a longitudinal tension to or release the longitudinal tension from the first end portion of the stent and the second end portion of the stent; and a control system comprising; a housing having a chamber formed therein; a first drive at least partially positioned and movable within the housing and operably connected to the first shaft; a second drive at least partially positioned and movable within the housing and operably connected to the second shaft; a biasing member, the biasing member comprising a spring; and a pressure controller operably connected to the housing, the pressure controller changing the pressure within the chamber and to move the second drive relative to the first drive so that movement of the second drive relative to the first drive in a first direction causes the second shaft to move relative to the first shaft to expand the stent operably connected thereto and movement of the second drive relative to the first drive in a second direction causes the second shaft to move relative to the first shaft to reconstrain the stent from an expanded configuration to a constrained configuration so that the longitudinal tension is applied to the first end portion and the second end portion of the stent in the constrained configuration by movement of the second drive relative to the first drive in the second direction. - View Dependent Claims (13, 14, 15)
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Specification