Graft deployment assist tool
First Claim
1. A system for delivering and deploying an expandable prosthesis comprising:
- a sheath having a proximal end, a distal end, and a lumen extending between the proximal and distal ends and defining an inner surface;
a delivery catheter slideably disposed within the lumen and having an outer surface in frictional contact with the inner surface of the sheath lumen;
an expandable prosthesis disposed on a distal portion of the delivery catheter and within the lumen of the sheath;
a hemostatic device comprising a housing connected to the proximal end of the sheath and a first seal disposed within the housing and sealingly engaging the delivery catheter; and
a deployment assist device comprising a sleeve and a second seal disposed within the sleeve that is adapted to sealingly engage the catheter,the deployment assist device being movable between a first position in which the sleeve is disposed outside of the hemostatic device housing and the first seal is sealingly engaged with an outer surface of the catheter effecting a first frictional resistance between the housing and the catheter, and a second position in which at least a portion of the sleeve is disposed within the housing between an inner surface of the housing and the outer surface of the catheter,wherein, in the second position, the first seal is sealingly engaged with an outer surface of the sleeve and the second seal is sealingly engaged with the outer surface of the catheter and effecting a second frictional resistance between the deployment assist device and the catheter; and
wherein the second frictional resistance is less than the first frictional resistance between the housing and the catheter, thereby reducing a force necessary to effect relative movement between the sheath and the catheter.
3 Assignments
0 Petitions
Accused Products
Abstract
A delivery system for a medical device may include a sheath, a catheter slideably disposed within the sheath, and a hemostatic device comprising a housing disposed around and sealingly engaged with the sheath by a first seal. A sleeve is slideably coupled to the catheter and comprises a second seal sealingly engaging the catheter. The sleeve is movable between a first position, in which the sleeve is disposed outside of the housing and the first seal is sealingly engaged with an outer surface of the catheter, and a second position in which at least a portion of the sleeve is disposed within the housing between an inner surface of the housing and the outer surface of the catheter, wherein, in the second position, the first seal is sealingly engaged with an outer surface of the sleeve and the second seal is sealingly engaged with the outer surface of the catheter.
26 Citations
21 Claims
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1. A system for delivering and deploying an expandable prosthesis comprising:
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a sheath having a proximal end, a distal end, and a lumen extending between the proximal and distal ends and defining an inner surface; a delivery catheter slideably disposed within the lumen and having an outer surface in frictional contact with the inner surface of the sheath lumen; an expandable prosthesis disposed on a distal portion of the delivery catheter and within the lumen of the sheath; a hemostatic device comprising a housing connected to the proximal end of the sheath and a first seal disposed within the housing and sealingly engaging the delivery catheter; and a deployment assist device comprising a sleeve and a second seal disposed within the sleeve that is adapted to sealingly engage the catheter, the deployment assist device being movable between a first position in which the sleeve is disposed outside of the hemostatic device housing and the first seal is sealingly engaged with an outer surface of the catheter effecting a first frictional resistance between the housing and the catheter, and a second position in which at least a portion of the sleeve is disposed within the housing between an inner surface of the housing and the outer surface of the catheter, wherein, in the second position, the first seal is sealingly engaged with an outer surface of the sleeve and the second seal is sealingly engaged with the outer surface of the catheter and effecting a second frictional resistance between the deployment assist device and the catheter; and wherein the second frictional resistance is less than the first frictional resistance between the housing and the catheter, thereby reducing a force necessary to effect relative movement between the sheath and the catheter.
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2. A system for delivering and deploying a medical device comprising:
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a housing comprising a first seal; a catheter having an outer surface and slideably extending through the housing; a sleeve comprising a second seal; the sleeve being movable between a first position in which the sleeve is disposed outside of said housing and a second position in which at least a portion of the sleeve is disposed within the housing between an inner surface of the housing and the outer surface of the catheter; wherein when the sleeve is in the first position the first seal of the housing is sealingly engaged with the outer surface of the catheter and effects a first frictional resistance between the housing and the catheter, and when the sleeve is in the second position the first seal of the housing is sealingly engaged with an outer surface of the sleeve and the second seal of the sleeve is sealingly engaged with at least a portion of the outer surface of the catheter; wherein the second seal of the sleeve effects a second frictional resistance between the sleeve and the catheter, the second frictional resistance being less than the first frictional resistance. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of reducing a force necessary to effect movement between a housing and a catheter the method comprising:
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providing a delivery device; the delivery device comprising a housing and a catheter slideably extending through the housing, the housing comprising a first seal that exerts a first sealing force against an external surface of the catheter that effects a first frictional resistance to relative movement between the catheter and the housing; and advancing a sleeve over the catheter and through the first seal of the housing, whereby the first seal is decoupled from the catheter and sealingly engages an outer surface of the sleeve, the sleeve at least partially isolating the catheter from the first sealing force, wherein the sleeve comprises a second seal that applies a second sealing force against at least a portion of the external surface of the catheter that effects a second frictional resistance to relative movement between the catheter and the housing, the second frictional resistance being less than the first frictional resistance.
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Specification