Granted Patent B2

US 12,616,821 · App. 18/380,787 · Granted May 5, 2026

Inventor: Andrew Bunney (Minneapolis, MN)

A61M27/00A61M3/0283A61M25/0032A61M25/007A61M25/0097A61M25/0102A61M25/09A61M29/00

Abstract

Claims (28)

1 . A system for draining an abscess, the system comprising:

a catheter having a first lumen and a second lumen; and

a stiffener sized to fit inside the first lumen, wherein the stiffener defines:

a channel sized to fit the second lumen such that a distal end of the stiffener can pass into and through the first lumen of the catheter with the second lumen positioned in the channel of the stiffener while the stiffener slides through the first lumen; and

a guidewire passage positioned at a center of a diameter defining the stiffener.

2 . The system of claim 1 , wherein the catheter defines a first lumen inlet at the distal end of the catheter, wherein the stiffener defines a dilator at the distal end of the stiffener, and wherein the stiffener is sized such that the dilator extends out of the first lumen inlet when the catheter and dilator are combined to be inserted into a patient.

3 . The system of claim 2 , wherein the second lumen further comprises a second lumen outlet at the distal end of the catheter, the first lumen inlet and the second lumen outlet are coplanar.

4 . The system of claim 2 , wherein the first lumen inlet is farther from a proximal end than a second lumen outlet.

5 . The system of claim 2 , wherein a second lumen outlet is farther from a proximal end than the first lumen inlet.

6 . The system of claim 1 , wherein the channel is defined along a perimeter edge of the stiffener.

7 . The system of claim 1 , wherein the second lumen is positioned inside the first lumen.

8 . The system of claim 1 , wherein the second lumen is coupled to an interior surface of the first lumen.

9 . The system of claim 1 , wherein a wall of the first lumen further comprises a plurality of side holes.

10 . The system of claim 1 , wherein the catheter further comprises a plurality of voids extending from the first lumen through an outer wall to a space exterior of the first lumen.

11 . The system of claim 1 , wherein the catheter further comprises:

a first lumen outlet at a proximal end of the catheter; and

a second lumen inlet at the proximal end of the catheter.

12 . The system of claim 11 , further comprising a hub positioned at the proximal end of the catheter, the hub comprising:

an inlet conduit coupled to the second lumen inlet; and

an outlet conduit coupled to the first lumen outlet.

13 . The system of claim 1 , wherein a portion at the distal end of the catheter conforms to at least one of a C-shape or a spiral shape responsive to a removal of the stiffener.

14 . The system of claim 1 , further comprising a tip coupled to and extending from the distal end of the first lumen, the tip narrowing to a diameter less than the diameter of the first lumen.

15 . A system for draining an abscess, the system comprising:

a catheter sized and configured for percutaneous use in draining the abscess, the catheter defining a drainage lumen and an irrigation lumen;

a negative pressure source configured to be connected to the drainage lumen at a proximal end of the catheter;

an irrigation source configured to be connected to the irrigation lumen at the proximal end of the catheter, wherein the irrigation source is configured to irrigate the abscess while the negative pressure source operates to drain the abscess;

a stiffener sized to fit inside the drainage lumen about the irrigation lumen, the stiffener comprising a channel positioned at an outer diameter of the stiffener and configured to allow the channel of the stiffener to pass about the irrigation lumen as the stiffener passes into and through the drainage lumen, the stiffener comprising a guidewire passage positioned at a center of the outer diameter defined by the stiffener; and

a guidewire configured to engage the guidewire passage to couple to the stiffener.

Continuity (2)

References Cited (17)