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Multilumen catheter
| Details |
Inventors: Cianci, James P.; Gross, James R.; Beattie, David C.; Nichols, Troy;
Assignee: The Kendall Company (Mansfield, MA)
Primary Examiner: Yasko; John D.
Assistant Examiner: Gutowski; Anthony
Attorney, Agent or Firm: Isaacs; Alvin
A multilumen catheter having a distal portion with a soft tip and reduced cross-section. The multilumen catheter of the present invention includes a flexible, elongated first catheter tube and a flexible, elongated, dual-lumen catheter tube which has a first and second lumens integrally formed and is disposed within the first catheter tube. The cross-section of the dual-lumen catheter tube is smaller than that of the first catheter tube and therefore, an independent, single lumen is defined in the space between the first catheter tube and the dual-lumen catheter tube. The dual-lumen catheter tube extends beyond the distal end of the first catheter tube thereby providing an overall reduced cross-section of the distal portion of the present multilumen catheter. Furthermore, the dual-lumen catheter tube may be formed from a softer material than that of the first cathether tube thereby providing a softer distal portion of the present multilumen catheter. A protective hub encapsulates and secures the proximal ends of the first and dual-lumen catheter tubes, and facilitates fluid communication between each of the lumens and fluid transfer devices. |
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DETAILED DESCRIPTION OF THE INVENTION Referring now to the drawings, one embodiment of the multilumen catheter according to the present invention is shown in FIGS.
1A-1D.
Referring to FIG.
1A the multilumen catheter 10 comprises a flexible, elongated catheter body 12 having a proximal portion 14 and a distal portion 16.
The proximal portion 14 terminates in a hub 40 which secures the catheter body 12 and facilitates fluid communication between the multilumen catheter 10 and fluid transfer devices or pressure monitoring devices via extension tubing 34, 36, 38.
The distal portion 16 includes distal termini 44, 48, 50 which allow fluids entering the multilumen catheter 10 via extension tubing 34, 36, 38 to exit from the multilumen catheter 10.
The flexible elongated catheter body 12 includes a first, flexible, elongated catheter tube 18 and a flexible, elongated, dual-lumen catheter tube 20 disposed within the first catheter tube 18 and abutting a portion of the inner wall 26 of the first catheter tube 18 at least at the proximal end of tube 18.
The dual-lumen catheter tube 20 extends beyond the distal end 22 of the first catheter tube 18.
Suitable materials from which the first 18 and dual-lumen 20 catheter tubes may be made include polyurethane, silicone, nylon and polyvinyl chloride (PVC), polyurethane being preferred.
The dual-lumen catheter tube 20 may be made from a less rigid polyurethane than the first catheter tube 18 thereby providing a softer distal portion 16 of the multilumen catheter 10.
As discussed above, a softer distal portion 16 of the multilumen catheter 10 is less traumatic for the patient.
The outer diameter of the dual-lumen catheter tube 20 is smaller than that of the first catheter tube 18.
Therefore, an independent, single lumen 24 is defined in the space between the inner wall 26 of the first catheter tube 18 and the outer wall 28 of the dual-lumen catheter tube 20.
The single lumen 24 extends throughout the length of the first catheter tube 18.
The dual-lumen catheter tube 20 includes first 30 and second 32 lumens integrally formed such as by extrusion and extending throughout the length of the dual-lumen catheter tube 20
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