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US 9,788,983 B2Granted
Removable sheath assembly for a polymer scaffold
AssigneeAbbott Cardiovascular Systems Inc.
InventorsMark C. Johnson, Annie P. Liu, Erika Danielle Anderson-Bolden
Life of this patent
Estimating the term…
Abstract
A medical device includes a polymer scaffold crimped to a catheter having an expansion balloon. A sheath is placed over the crimped scaffold after crimping to reduce recoil of the crimped polymer scaffold and maintain scaffold-balloon engagement relied on to hold the scaffold to the balloon when the scaffold is being delivered to a target in a body. The sheath is removed by a health professional either by removing the sheath directly or using a tube containing the catheter.
Claims18
An apparatus, comprising:
- a catheter having a distal end;
- a scaffold crimped to a balloon of the catheter, the scaffold having a length;
- and
- a sheath disposed over the scaffold, the sheath comprising a constraining portion and a protecting portion, the constraining portion comprising a first cylinder, a second cylinder, and a frustum between the first and second cylinders, and the constraining portion is configured to slide over the protecting portion;
- wherein the apparatus is configured for being passed through a mammalian body only after the sheath is removed;
- and
- wherein the apparatus is sterilized and contained within a sealed container.
4 more elements
An apparatus, comprising:
- a catheter having a distal end;
- a balloon-expanded scaffold crimped to a balloon of the catheter;
- and
- a sheath disposed over the scaffold and including a constraining sheath and a protecting sheath, wherein both the constraining sheath and the protecting sheath are disposed over an entire length of the scaffold and extend beyond the catheter distal end;
- wherein the constraining sheath includes a first inner diameter and a second inner diameter, greater than the first inner diameter, and a cylindrical portion forms the second inner diameter;
- wherein the apparatus is configured for being passed through a mammalian body only after the constraining and protecting sheaths are removed;
- and
- wherein the apparatus is sterilized and contained within a sealed container.
5 more elements
An apparatus, comprising:
- a catheter;
- a scaffold crimped to a balloon of the catheter;
- a protecting sheath disposed over the scaffold;
- and
- a constraining sheath disposed over the protecting sheath, the constraining sheath including a first cylindrical portion configured to apply a radial constraining force on the scaffold, a second cylindrical portion configured to not apply a radial compressive force on the scaffold, and a frustum disposed between the first and second cylindrical portions;
- wherein both a length of the first cylinder portion and a length of the second cylindrical portion are greater than or about equal to a length of the scaffold;
- wherein the apparatus is configured for being passed through a mammalian body only after the constraining sheath and the protecting sheath are removed;
- and
- wherein the apparatus is sterilized and contained within a sealed container.
6 more elements
Dependencies are inferred from the claim text.