Medical device delivery sheath
First Claim
Patent Images
1. A catheter comprising a radially expandable tip on a distal end of the catheter, the tip comprising:
- a cuff having a first end and a second end distal to the first end, the second end comprising a plurality of irregular tabs; and
a polymer jacket surrounding the cuff,the cuff and the polymer jacket being adapted to allow the second end of the cuff to expand more easily than the first end of the cuff in response to an axially directed force on the tip of the catheter.
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Accused Products
Abstract
A support member for a catheter sheath is disclosed. The support member has a series of ribs with a distal member having integrated fingers for providing radial compliance. The support member provides sufficient axial stiffness to provide a desired pushability of a minimally invasive device for replacing a heart valve. Various alternative embodiments are also described.
658 Citations
30 Claims
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1. A catheter comprising a radially expandable tip on a distal end of the catheter, the tip comprising:
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a cuff having a first end and a second end distal to the first end, the second end comprising a plurality of irregular tabs; and a polymer jacket surrounding the cuff, the cuff and the polymer jacket being adapted to allow the second end of the cuff to expand more easily than the first end of the cuff in response to an axially directed force on the tip of the catheter. - View Dependent Claims (2, 3, 4, 5)
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6. A delivery tool for endovascularly delivering a replacement heart valve, the delivery tool comprising a sheath comprising:
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a support member comprising a ribcage structure with at least one spine and a plurality of ribs; and a polymer jacket surrounding the support member. - View Dependent Claims (7)
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- 8. A support member for a catheter, the support member comprising a spine and a substantially continuous rib cage substantially along the length of said spine.
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10. An endovascular valve delivery system comprising:
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a deployment tool having a proximal end, a distal end, and a sheath, the sheath having a proximal zone and a distal zone wherein the distal zone of the sheath has a reduced radial stiffness compared to said proximal zone such that the distal zone may be expanded to form a funnel in response to an axially directed force; and an implant releasably engaged to the deployment tool distal end and adapted to be drawn into the sheath by engaging the implant with the sheath to expand the sheath distal zone into a funnel. - View Dependent Claims (11, 12, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A system for endovascular replacement of a heart, the system comprising:
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a handle; a deployment tool attached to said handle, the deployment tool comprising one or more actuation elements extending therethrough; a replacement heart valve releasably engaged to the deployment tool; and a sheath extending substantially over the length of the deployment tool and replacement heart valve, the sheath comprising a support member comprising; a first zone of uniform stiffness, said first zone extending substantially over the entire length of the deployment tool; and a second zone of variable stiffness, said second zone forming a distal tip of the sheath, the second zone being capable of expansion to form a funnel for assisting in the capture of the replacement heart valve. - View Dependent Claims (23)
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24. A method of drawing a replacement heart valve into a deployment system having an inner deployment tool member in sliding engagement with an outer sheath member, the deployment tool member supporting the replacement valve, the sheath member having a radially expandable distal tip, the method comprising the steps of:
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holding one of the members in a substantially stationary position relative to the patient; and moving the other member relative to the stationary member to draw the replacement heart valve within the sheath member. - View Dependent Claims (25, 26, 28)
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29. A method of deploying a replacement heart valve using a deployment system having an inner deployment tool member and an outer sheath member, wherein the deployment tool member and the sheath member are releasably engaged to an implant, the method comprising the steps of:
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moving at least one of the members with respect to the other member to bend a tip of the sheath member; and releasing an engagement between the sheath member and the implant. - View Dependent Claims (30)
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Specification