Split-tip catheter including lateral distal openings

• US 8,696,614 B2
• Filed: 11/11/2011
• Issued: 04/15/2014
• 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., Woodley, William D., Walton, Mark E.
• Primary Examiner(s): Sirmons, Kevin C
• Assistant Examiner(s): GILBERT, ANDREW M
• Application Number:
  US13/294,941
• Publication Number:
  US 20120059304A1
• Time in Patent Office: 886 Days
• Field of Search: 604/28, 604/29, 604/43, 604/93.01, 604/94.01, 604/264, 604/6.16
• US Class Current: 604/29
• 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 is disclosed. In one embodiment, the split-tip catheter includes a catheter body that defines a first lumen and a second lumen. The catheter body further comprises a split distal region, including a venous segment that defines a distal portion of the first lumen and an arterial segment that defines a distal portion of the second lumen. The venous segment includes a recess extending proximally of a nose portion; and a lateral opening in fluid communication with the first lumen. The arterial segment is separate from the venous segment and is removably seatable in the recess provided by the venous segment such that it “nests” therein. The arterial segment also includes a lateral opening in fluid communication with the second lumen.

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 including an arterial lateral opening defined by a compound-angle cross cut; 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 tapering 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, the venous segment including a venous lateral opening defined by a compound-angle cross cut.

2. The split-tip catheter according to claim 1, wherein 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 and arterial segment and such that a lateral flow direction is imparted to fluid outflowing therefrom.

3. The split-tip catheter according to claim 2, wherein the longitudinal axis of the venous lateral opening is angularly disposed with respect to the longitudinal axis of the arterial lateral opening.

4. The split-tip catheter according to claim 1, wherein the distal nose portion includes a venous channel in fluid communication with the venous segment lumen and a guidewire channel separate from the venous channel.

5. The split-tip catheter according to claim 4, wherein the distal nose portion guidewire channel is aligned with the arterial segment lumen when the split distal region is in a nested configuration.

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

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

8. 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; 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 tapering 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, the distal nose portion including a venous channel in fluid communication with the venous segment lumen and a guidewire channel separate from the venous channel along the entire length.

9. The split-tip catheter according to claim 8, 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.

10. The split-tip catheter according to claim 9, wherein 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 and arterial segment and such that a lateral flow direction is imparted to fluid outflowing therefrom.

11. The split-tip catheter according to claim 10, wherein the longitudinal axis of the venous lateral opening is angularly disposed with respect to the longitudinal axis of the arterial lateral opening.

12. The split-tip catheter according to claim 8, wherein the distal nose portion guidewire channel is aligned with the arterial segment lumen when the split distal region is in a nested configuration.

13. The split-tip catheter according to claim 8, wherein the arterial segment distal end has a rounded shape providing a smooth contour.

14. The split-tip catheter according to claim 8, wherein the catheter body includes a pre-curved configuration.