SHORT THROW CENTERED HANDLE FOR STENT DELIVERY SYSTEM
First Claim
1. A stent delivery system comprising:
- an elongate outer tubular shaft including a proximal portion, a distal portion, and a stent attachment portion on the distal portion of the outer shaft, said stent attachment portion configured for attachment to a proximal stent end;
an elongate inner shaft extending longitudinally, coaxially, slidably through the outer elongate tubular shaft including a proximal portion, a distal portion, and a stent receiving portion on the distal portion of the shaft, said stent receiving portion configured for attachment to a distal stent end;
a fixed handle that is fixedly attached to a housing, which housing is configured to house a stent-deployment mechanism; and
a stent deployment mechanism disposed in the housing, the mechanism comprising;
a movable handle configured to be longitudinally slidable relative to the housing;
a first rack member attached to a proximal portion of the inner shaft and comprising a first cog-engaging surface;
a second rack member attached to the movable handle, attached to a proximal portion of the outer shaft, and comprising a second cog-engaging surface; and
a cog rotatably attached to the housing in a manner configured to provide mechanical communication between the first and second cog-engaging surfaces of the first and second rack members;
wherein the inner shaft and the outer shaft are configured to cooperatively apply opposing longitudinal tensile forces to at least a portion of a stent in the constrained configuration with the proximal and distal constraining members each in a first position corresponding to a first relative position of the movable handle, first rack member, and second rack member.
2 Assignments
0 Petitions
Accused Products
Abstract
A stent delivery system and method for implanting a stent are provided. The stent delivery system includes an elongate shaft including a proximal portion, a distal portion, a lumen extending at least partially therethrough, and a stent receiving portion on the distal portion of the shaft. It also includes a stent positioned at the stent receiving portion of the elongate shaft, the stent having a constrained configuration and an expanded configuration. A proximal constraining member and a distal constraining member releasably connected to the stent and having a first position and a second position are also included. The proximal constraining member and the distal constraining member cooperatively apply longitudinal tensile force to at least a portion of the stent with the proximal and distal constraining members each in the first position. A cog and rack mechanism is included to provide mechanical advantage and efficiency during stent deployment.
29 Citations
21 Claims
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1. A stent delivery system comprising:
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an elongate outer tubular shaft including a proximal portion, a distal portion, and a stent attachment portion on the distal portion of the outer shaft, said stent attachment portion configured for attachment to a proximal stent end; an elongate inner shaft extending longitudinally, coaxially, slidably through the outer elongate tubular shaft including a proximal portion, a distal portion, and a stent receiving portion on the distal portion of the shaft, said stent receiving portion configured for attachment to a distal stent end; a fixed handle that is fixedly attached to a housing, which housing is configured to house a stent-deployment mechanism; and a stent deployment mechanism disposed in the housing, the mechanism comprising; a movable handle configured to be longitudinally slidable relative to the housing; a first rack member attached to a proximal portion of the inner shaft and comprising a first cog-engaging surface; a second rack member attached to the movable handle, attached to a proximal portion of the outer shaft, and comprising a second cog-engaging surface; and a cog rotatably attached to the housing in a manner configured to provide mechanical communication between the first and second cog-engaging surfaces of the first and second rack members; wherein the inner shaft and the outer shaft are configured to cooperatively apply opposing longitudinal tensile forces to at least a portion of a stent in the constrained configuration with the proximal and distal constraining members each in a first position corresponding to a first relative position of the movable handle, first rack member, and second rack member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A handle for a stent delivery system, the handle comprising:
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a housing configured to house components of a stent deployment mechanism; a handle member movably attached to the housing; a first rack member fixed to the handle member and disposed longitudinally slidably in the housing, where the first rack member is configured for attachment to a proximal stent end; a rotatable cog attached to the housing, the cog comprising a first cog surface and a second cog surface, wherein the first cog surface is configured in engagement with the first rack member such that a first longitudinal movement of the first rack member will rotate the cog; and a second rack member disposed longitudinally slidably within the housing and configured for attachment to a distal stent end, wherein the second rack member is configured in engagement with the second cog surface such that rotation of the cog will generate a second longitudinal movement of the second rack member in a direction opposite the first longitudinal direction.
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Specification