Catheter including arcuate transition region

• US 9,492,634 B2
• Filed: 04/02/2007
• Issued: 11/15/2016
• Est. Priority Date: 03/31/2006
• Status: Active Grant

• Current Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: Moehle, Ryan T., Patterson, Ryan C.
• Primary Examiner(s): SCHMIDT, EMILY LOUISE
• Application Number:
  US11/732,030
• Publication Number:
  US 20070233042A1
• Time in Patent Office: 3,515 Days
• Field of Search: 604/523, 604/43, 604/93.01, 604/284, 604/533, 604/534, 604/4.01, 604/6.16
• US Class Current: 1/1
• 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 25/0021 characterised by the form of the tubing A61M25/0054 takes precedence
• CPC Class Codes: A61M 25/0023 by the form of the lumen, e.g. cross-section, variable diameter
• 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 25/0041 pre-formed, e.g. specially adapted to fit with the anatomy of body channels urethral catheters A61F2/04
• 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 5/1582 Double lumen needles

Abstract

A catheter, with one or more lumens, having a first portion and a second portion and an arcuate transition region extending between the first portion and the second portion. The first portion is nonparallel to the second portion.

Claims

1. A catheter comprising:

a catheter body extending between a distal end and a proximal end and defining at least one lumen, the catheter body including;

a first straight portion, a second straight portion, and an arcuate transition region extending in a continuous helical curve for more than a half revolution between the first straight portion and the second straight portion, the first straight portion crossing the second straight portion for a given reference plane, the arcuate transition region positioned at or near an insertion site into a body of a patient during catheter use.

2. The catheter of claim 1, wherein the helical curve of the arcuate transition region traverses about 225°

.

3. The catheter of claim 1, wherein a separation angle between 0°

and 90°

is formed between a central axis of the first portion and a central axis of the second portion.

4. The catheter of claim 1, wherein the catheter body defines at least two lumens.

5. The catheter of claim 4, wherein the distal end of the catheter body comprises a venous extension leg including a first lumen, and an arterial extension leg including a second lumen.

6. The catheter of claim 4, wherein the first straight portion and the second straight portion are separated by at least one transformation region within which a position of a septum dividing the at least two lumens at least partially changes.

7. The catheter of claim 6, wherein the position of the septum changes in a clockwise direction relative to a distal direction along the catheter.

8. The catheter of claim 6, wherein the position of the septum changes in a counter-clockwise direction relative to a distal direction along the catheter.

9. The catheter of claim 6, wherein the position of the septum changes up to about 360°

.

10. The catheter of claim 1, wherein the proximal end of the catheter body comprises at least one connector.

11. The catheter of claim 10, wherein the proximal end of the catheter body comprises a first connector including a first lumen, and a second connector including a second lumen.

12. The catheter of claim 1, wherein at least a majority of the first straight portion is configured to be disposed outside the body of the patient and, wherein at least a segment of the second straight portion has a length suitable for insertion inside the body of the patient.

13. A catheter comprising:

a catheter body extending between a catheter body first end and a catheter body second end and defining two lumens in a Cartesian x-y-z coordinate system, the catheter body including;

a first portion extending from the catheter body second end along an x-axis in a positive direction to a first end of an arcuate transition region and a second portion extending from a second end of the arcuate transition region in a negative x and negative y direction to the catheter body first end, the arcuate transition region connecting the first portion to the second portion;

wherein, during use, at least a majority of the first portion is disposed outside of a body of a patient and, wherein at least a segment of the second portion has a length suitable for insertion inside the body of the patient; and

wherein an exterior arc angle between a central axis of the first portion and a central axis of the second portion is greater than 180°

when the arcuate transition region is in a substantially unstressed state such that the first portion and the second portion have a common (x,y) coordinate point not at the catheter body first end or catheter body second end when a z axis of the x-y-z coordinate system is oriented parallel to a longitudinal axis of the arcuate transition region such that the arcuate transition region curls around the longitudinal axis.

14. The catheter of claim 13, wherein the catheter body first end includes a non-helical terminus.

15. The catheter of claim 13, wherein the first portion and the second portion are separated by at least one transformation region within which a position of a septum dividing the at least two lumens at least partially changes.

16. The catheter of claim 13, wherein a separation angle between 0°

and 90°

is formed between the central axis of the first portion and the central axis of the second portion in the z-direction.

17. The catheter of claim 13, wherein the exterior arc angle is about 225°

.