Catheter stylet

• US 5,498,249 A
• Filed: 03/24/1994
• Issued: 03/12/1996
• Est. Priority Date: 03/24/1994
• Status: Expired due to Term

• Current Assignee: Radius International, Inc.
• Original Assignee: Radius International, Inc.
• Inventors: Quinn, Kathryn A.
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): STRIGHT, RONALD K
• Application Number:
  US08/217,447
• Time in Patent Office: 719 Days
• Field of Search: 604/280, 604/264, 604/266, 604/267, 604/164, 604/170, 604/281, 604/282, 128/656-658, 128/772
• US Class Current: 604/528
• CPC Class Codes: A61J 15/00 Feeding-tubes for therapeutic purposes
• CPC Class Codes: A61J 15/0007 inserted by using a guide-wire guide wires A61M25/09
• CPC Class Codes: A61M 25/0102 Insertion or introduction using an inner stiffening member, e.g. stylet or push-rod

Abstract

The present invention is directed to a catheter tube assembly for the internal administration or aspiration of fluids to the body cavity of a patient. The assembly includes a catheter tube and a stylet. The catheter tube has a passage section with the stylet being disposed in the passage section. The stylet has an elongate body portion having distal and proximal ends. The stylet also includes a terminal end. A first leg and a second leg interconnect the body portion to the terminal end. The stylet further includes a support portion located between the body portion and the terminal end. In one aspect of the invention, the support portion and the terminal end from a circular loop.

Claims

1. A catheter tube assembly, comprising:

a) a catheter tube having a passage therein and a stylet disposed in said passage;

b) said stylet including an elongate body portion and an insertion end;

c) said insertion end including a loop and a pair of connecting legs separate from said loop and connecting said loop to said body portion;

d) said loop including a terminal portion, opposed top and bottom portions and a proximal portion opposite said terminal portion;

e) said connecting legs extending between said top and bottom portions of said loop and said elongate body portion, and converging toward said body portion;

f) said terminal portion and said top and bottom portions of said loop forming a terminal end on said stylet;

g) said proximal portion of said loop comprising a support portion for said insertion end of said stylet which is effective to prevent deformation of said loop and said connecting legs, said proximal portion being separate from said connecting legs.

2. The catheter tube assembly of claim 1 wherein said terminal end and said support portion form a circular loop.

3. The catheter tube assembly of claim 2 wherein said connecting legs leg form a V-shape.

4. The catheter tube assembly of claim 2 wherein said stylet is made from wire.

5. A stylet for use in the intubation of a catheter tube, comprising:

a) an elongate body portion having a distal end and a proximal end;

b) a loop having a top portion, a proximal portion, a bottom portion and a distal portion;

c) said loop being connected to said body portion by first and second legs extending between said top and bottom portions of said loop, respectively, and said distal end of said body portion;

d) said proximal portion of said loop comprising a support portion extending between said legs, said proximal portion being separate from said legs;

e) said top, distal and bottom portions of said loop forming a terminal end on said stylet.

6. The stylet of claim 5 wherein said terminal end and said support portion form a circular loop.

7. The stylet of claim 6 formed from a single piece of wire.

8. The stylet of claim 7 wherein said body portion comprises a first segment and a second segment wrapped around each other in a double helix formation.

9. The stylet of claim 6 wherein said first leg and said second leg form a V-shape.

10. The stylet of claim 7 wherein said wire is made from stainless steel.

11. A catheter tube assembly, comprising:

a) a catheter tube having a passage therein and a styler disposed in said passage;

b) said stylet being fabricated of wire and including an elongate body portion having a distal end and a proximal end;

c) a substantially circular loop connected to the distal end of said body portion and having a diameter slightly less than the diameter of said catheter tube passage, said loop defining a plane and said body portion adjacent said loop being substantially coplanar therewith;

d) said substantially circular loop comprising a top portion, a proximal portion, a bottom portion and a distal portion, each of said top, distal and bottom portions of said loop comprising at least two adjacent segments of wire, said proximal portion of said loop comprising one less segment of wire than said top, distal and bottom portions;

e) said body portion comprising a first wire segment and a second wire segment wrapped around each other to form a double helix configuration.

12. The stylet of claim 11 wherein said wire is made from stainless steel.

13. A catheter tube assembly, comprising:

a) a catheter tube having a passage therein and a stylet disposed in said passage;

b) said stylet including an elongate body portion having a distal end and a proximal end;

c) said stylet also including a loop having a top portion, a proximal portion, a bottom portion and a distal portion with each of said top, distal and bottom portions comprising at least two adjacent wire segments and said proximal portion comprising one less segment of wire than said top, distal and bottom portions, said loop defining a plane and said body portion adjacent said loop being substantially coplanar therewith.

14. The stylet catheter tube assembly of claim 13 wherein said proximal portion comprises only a single segment of said wire.

15. A stylet for use in the intubation of a catheter tube, comprising:

a) a stylet including an elongate body portion having a distal end and a proximal end;

c) said stylet also including a loop having a top portion, a proximal portion, a bottom portion and a distal portion with each of said top, distal and bottom portions comprising at least two adjacent wire segments and said proximal portion comprising one less segment of wire than said top, distal and bottom portions, said loop defining a plane and said body portion adjacent said loop being substantially coplanar therewith.