Apparatuses, Systems, And Methods For Inserting Catheters Having Enhanced Stiffening And Guiding Features

Patent metadata

Field	Value
Publication number	US-2019240453-A1
Application number	US-201916384509-A
Country	US
Kind code	A1
Filing date	Apr 15, 2019
Priority date	Jul 14, 2014
Publication date	Aug 8, 2019
Grant date	—

Abstract

A catheter assembly including a multi-lumen catheter, a stylet, and a guide-wire. The multi-lumen catheter includes a first lumen in fluid communication with a first distal opening and a second lumen in fluid communication with a second distal opening. The stylet is designed for insertion through the first lumen, having a length greater than a length of the first lumen such that a distal portion of the stylet can extend distal of the first distal opening. The distal portion of the stylet can include a stylet distal opening, a stylet proximal opening in communication with the stylet distal opening, and an expandable portion. The expandable portion can include a first expansion side and a second expansion side at least partially separable from the first expansion side. The stylet proximal opening can be formed through the first expansion side.

First claim

What is claimed:

1 . A catheter assembly, comprising:
a multi-lumen catheter, comprising:
a first lumen in fluid communication with a first distal opening; and
a second lumen in fluid communication with a second distal opening;
a stylet designed for insertion through the first lumen, the stylet having a length greater than a length of the first lumen such that a distal portion of the stylet can extend distal of the first distal opening, the distal portion of the stylet comprising:
a stylet distal opening;
a stylet proximal opening in communication with the stylet distal opening; and
an expandable portion comprising a first expansion side and a second expansion side at least partially separable from the first expansion side, the stylet proximal opening formed through the first expansion side; and
a guide-wire designed for insertion through the second lumen, the stylet proximal opening, and the stylet distal opening.

2 . The catheter assembly according to claim 1 , wherein the expandable portion includes an expansion slit, the first expansion side and the second expansion side separable along the expansion slit.

3 . The catheter assembly according to claim 2 , wherein the expansion slit travels through an entire width of the distal portion of the stylet.

4 . The catheter assembly according to claim 1 , wherein the distal portion of the stylet is tapered from a first width at a proximal end of the distal portion to a second width less than the first width at a distal end of the distal portion.

5 . The catheter assembly according to claim 1 , wherein the first expansion side has a flat surface and the second expansion side has a curved surface.

6 . The catheter assembly according to claim 5 , wherein the stylet proximal opening tapers from a first width at a proximal end to a second width less than the first width at a distal end.

7 . A method of using the catheter assembly according to claim 1 , comprising:
positioning the guide-wire in a blood vessel with a distal end of the guide-wire at a desired location; inserting the stylet through the first lumen of the multi-lumen catheter such that the distal portion of the stylet extends distal of the first distal opening of the multi-lumen catheter; feeding a proximal end of the guide-wire through the stylet distal opening, the stylet proximal opening, and the second lumen of the multi-lumen catheter; and guiding the multi-lumen catheter the stylet together over the guide-wire to the desired location.

Assignees

• Bard Inc C R

Inventors

• Loesener German
• Prechtel Ericka J

Classifications

• A61M2025/0031

  characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment · CPC title

• A61M1/3661

  for haemodialysis · CPC title

• A61M25/0009

  Making of catheters or other medical or surgical tubes · CPC title

• A61M25/0102 Primary

  Insertion or introduction using an inner stiffening member, e.g. stylet or push-rod · CPC title