Catheter aperture with attachable structure
View Patent ↗An elongate catheter shaft is provided, having a side port aperture through a side wall of the catheter shaft between proximal and distal ends of the shaft. The side port aperture is open to a lumen. Embodiments of the present invention are directed to attached structures disposed in the side port aperture. The attached structures described herein are directed to biasing the catheter shaft in the region of a side port aperture in a straight or curved configuration that resists undesired flexure in the region of the side port aperture and to providing ease of wire guide passage.
1. A catheter device comprising an elongate shaft,
said elongate shaft comprising:
a proximal end;
a distal end;
a first lumen extending through at least a portion of the shaft and defined by a wall;
an aperture through the wall, open to the first lumen;
said aperture disposed between the proximal and distal ends, the shaft including at least one continuous portion adjacent the aperture such that the proximal and distal ends include a continuous shaft between them; and
an overlay disposed at least partially in the aperture, the overlay including an access port open to the first lumen, said access port being configured for passage of a wire guide therethrough, wherein an external diameter of the elongate shaft comprises a consistent external diameter along a shaft length from a region proximal of the overlay through a region distal of the overlay, such that the external shaft diameter along the overlay is no greater than the external shaft diameter immediately proximal of the overlay and immediately distal of the overlay.
2. The catheter device of claim 1 , wherein the overlay is constructed comprising a composition selected from a group consisting of polymer, radio-opaque material, metal, composite, ceramic, materials that have substantially the same composition as the shaft, and any combination thereof.
3. The catheter device of claim 1 , wherein the overlay comprises a material that is stiffer than material comprised by a shaft region adjacent the overlay.
4. The catheter device of claim 1 , wherein the access port of the overlay comprises a surface that is angled from a proximal exterior portion of the overlay to a distal portion of the overlay immediately adjacent the first lumen.
5. The catheter device of claim 1 , wherein the access port of the overlay comprises a generally cylindrical passage angled from a more proximal upper portion to a more distal lower portion of the overlay.
6. The catheter device of claim 1 , wherein the overlay further comprises an open passage generally continuous with the first lumen.
7. The catheter device of claim 1 , wherein the overlay is attached to the catheter device by overmolding, thermal bonding, adhesive bonding, mechanical attachment, or any combination thereof.
8. The catheter device of claim 1 , wherein the overlay comprises a prefabricated structure.
9. The catheter device of claim 1 , wherein the overlay is fabricated on the elongate shaft.
10. The catheter device of claim 1 , wherein the access port is smaller than the aperture.
11. A method of providing a side port aperture with a support structure, comprising the steps of:
providing an elongate catheter shaft, the catheter shaft comprising a lumen therethrough and a wall surrounding the lumen;
providing a side port aperture while leaving a shaft portion that is, continuous from proximal to distal of the aperture;
providing a support structure, the support structure comprising
a body configured to fit into at least a portion of the side port aperture;
a fenestration through the body, the fenestration providing an angled path from an upper side of the body therethrough to the lower side; and
attaching the support structure to the catheter shaft such that at least a portion of the support structure is disposed in the side port aperture and the fenestration of the support structure provides an opening to the lumen, said fenestration being smaller than the side port aperture, wherein an external diameter of the elongate shaft comprises a consistent external diameter along a shaft length from a region proximal of the support structure through a region distal of the support structure, such that the external shaft diameter along the support structure is no greater than the external shaft diameter immediately proximal of the support structure and immediately distal of the support structure.
12. A catheter device comprising a continuous elongate shaft,
said elongate shaft comprising:
a proximal end;
a distal end;
a first lumen extending through at least a portion of the shaft and defined by a wall;
an aperture through the wall, open to the first lumen;
said aperture disposed between the proximal and distal ends, occupying less than a complete circumference of the continuous shaft;
an attachment disposed at least partially in the aperture, the attachment comprising an access port open to the first lumen, said access port being configured for passage of a wire guide therethrough, wherein an external diameter of the elongate shaft comprises a consistent external diameter along a shaft length from a region proximal of the attachment through a region distal of the attachment, such that the external shaft diameter along the attachment is no greater than the external shaft diameter immediately proximal of the attachment and immediately distal of the attachment.
13. The catheter device of claim 12 , wherein the attachment is a selected one of an insert or an overlay.