Split-tip catheter including lateral distal openings

• US 10,258,732 B2
• Filed: 01/08/2016
• Issued: 04/16/2019
• Est. Priority Date: 10/26/2007
• Status: Active Grant

• Current Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: Gregersen, Colin S., Moehle, Ryan T., Patterson, Ryan C.
• Primary Examiner(s): Gilbert, Andrew M
• Application Number:
  US14/991,858
• Publication Number:
  US 20160121040A1
• Time in Patent Office: 1,194 Days
• CPC Class Codes: A61M 1/3653 Interfaces between patient blood circulation and extra-corporal blood circuit
• CPC Class Codes: A61M 1/3659 Cannulae pertaining to extracorporeal circulation
• CPC Class Codes: A61M 1/3661 for haemodialysis
• CPC Class Codes: A61M 2025/0031 characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment
• CPC Class Codes: A61M 2025/0037 characterized by lumina being arranged side-by-side
• CPC Class Codes: A61M 2025/0681 Systems with catheter and outer tubing, e.g. sheath, sleeve or guide tube
• CPC Class Codes: A61M 2202/0021 removed from and reintroduced into the body, e.g. after treatment
• CPC Class Codes: A61M 25/0029 characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports catheter shaft surface irregularities A61M2025/006
• CPC Class Codes: A61M 25/003 characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves catheter tips A61M25/0067
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
• CPC Class Codes: A61M 25/0194 Tunnelling catheters
• CPC Class Codes: A61M 25/09 Guide wires

Abstract

A split-tip catheter for placement within the vasculature of a patient and for use in hemodialysis or other suitable procedures. In one embodiment, the split-tip catheter includes a catheter body defining a first lumen and a second lumen, and a split distal region extending from a distal end of the catheter body. The split distal region includes an arterial segment defined by an outer wall enclosing an arterial segment lumen, the arterial segment lumen in fluid communication with the catheter body first lumen, and a venous segment defined by an outer wall enclosing a venous segment lumen, the venous segment lumen in fluid communication with the catheter body second lumen, the venous segment outer wall extending from the catheter body distal end to a distal nose portion. The distal nose portion may taper distally from a first outer perimeter to a second outer perimeter smaller than the first outer perimeter.

Claims

1. A split-tip catheter, comprising:

a catheter body including a first lumen and a second lumen; and

a split distal region extending from a distal end of the catheter body, comprising;

an arterial segment defined by an outer wall enclosing an arterial segment lumen, the arterial segment lumen in fluid communication with the catheter body first lumen, the arterial segment outer wall extending from the catheter body distal end to a distal end of the arterial segment, the arterial segment having a first length; and

a venous segment defined by an outer wall enclosing a venous segment lumen, the venous segment lumen in fluid communication with the catheter body second lumen, the venous segment outer wall extending from the catheter body distal end to a distal nose portion, the venous segment having a second length longer than the first length, the distal nose portion including;

a venous channel in fluid communication with the venous segment lumen, the venous channel terminating in a venous distal opening;

a guidewire channel terminating in a guidewire distal opening discrete and spaced from the venous distal opening; and

wherein a longitudinal axis of the guidewire channel is aligned with a longitudinal axis of the arterial segment lumen when the split distal region is in a delivery configuration.

2. The split-tip catheter according to claim 1, wherein the venous segment outer wall includes a planar side extending from the catheter body distal end to the distal nose portion, wherein the arterial segment outer wall includes a planar side extending from the catheter body distal end to the arterial segment distal end, and wherein the arterial segment outer wall planar side is in contact with the venous segment outer wall planar side along an entire length thereof in the delivery configuration.

3. The split-tip catheter according to claim 2, wherein the venous segment outer wall and the arterial segment outer wall together, in the delivery configuration, define a continuous columnar outer surface along the first length of the arterial segment.

4. The split-tip catheter according to claim 3, wherein the delivery configuration is maintained by a guidewire extending through the arterial segment lumen and the guidewire channel.

5. The split-tip catheter according to claim 1, wherein the venous segment includes a venous lateral opening proximal of the distal nose portion, wherein the arterial segment includes an arterial lateral opening proximal of the arterial segment distal end, and wherein each of the venous lateral opening and the arterial lateral opening is defined by a compound-angle cross cut.

6. The split-tip catheter according to claim 5, wherein the each of the venous lateral opening and the arterial lateral opening is skived such that a longitudinal axis thereof defines an acute angle with respect to a longitudinal axis of the respective venous segment or arterial segment and such that a lateral flow direction is imparted to fluid outflowing therefrom.

7. The split-tip catheter according to claim 6, wherein the longitudinal axis of the venous lateral opening is angularly disposed with respect to the longitudinal axis of the arterial lateral opening.

8. The split-tip catheter according to claim 1, wherein each of the arterial segment and the venous segment includes a plurality of lateral openings.

9. The split-tip catheter according to claim 1, wherein the distal nose portion tapers distally from a first outer perimeter to a second outer perimeter smaller than the first outer perimeter, the distal nose portion first outer perimeter greater than an outer perimeter of the venous segment outer wall.

10. The split-tip catheter according to claim 9, wherein the guidewire distal opening is circumscribed by the distal nose portion outer wall at the second outer perimeter.

11. The split-tip catheter according to claim 1, wherein an inner wall in the distal nose portion separates the guidewire channel from the venous segment lumen along an entire length of the venous segment.

12. The split-tip catheter according to claim 1, wherein the arterial segment distal end has a rounded shape providing a smooth contour.

13. The split-tip catheter according to claim 1, wherein the catheter body includes a pre-curved configuration.