Dual lumen cannula with adjustable length infusion tube

Inventors: Patrick A. Kelly (North Huntingdon, PA); Jerry Stokes (Sarver, PA); Robert G. Svitek (Freeport, PA)

A61M25/0026 A61M25/007 A61M39/105 A61M60/00 A61M1/3659 A61M2025/0031 A61M2025/0039

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Quick Facts

Patent No.: US 12697468
App. No.: 18/483,730
Granted: Aug 4, 2026
Kind: B2

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Abstract

A dual lumen coaxial cannula assembly including a first infusion tube having a proximal end, a distal end, and a sidewall extending circumferentially therebetween, as well as a second drainage tube co-axially aligned with the first infusion tube, the second drainage tube having a proximal end, a distal end, and a sidewall extending circumferentially therebetween. The assembly also includes a connector assembly, which has an inlet portion through which a portion of the first infusion tube is configured to extend and an outlet portion through which a portion of the second drainage tube is configured to extend. The connector assembly is configured to enable selective axial displacement of the first infusion tube through the second drainage tube.

Claims (42)

1 . A dual lumen coaxial cannula assembly comprising:

a first infusion tube having a first elongate body defining a first lumen therethrough, the first infusion tube having a proximal end, a distal end, and a sidewall extending circumferentially therebetween;

a second drainage tube co-axially aligned with the first infusion tube and having a second elongate body with a second lumen defined by a space between the first infusion tube and second drainage tube, the second drainage tube having a proximal end, a distal end, and a sidewall extending circumferentially therebetween;

a connector assembly, wherein the connector assembly comprises a common lumen portion in fluid communication with the second lumen, an outlet portion extending proximally from the common lumen portion and in fluid communication with the second lumen, and an inlet portion through which the first infusion tube is configured to extend, the inlet portion extending proximally from the common lumen at an acute angle from the outlet portion, the common lumen portion being coupled to the second drainage tube and through which the first infusion tube is configured to extend into the second drainage tube, wherein the connector assembly is configured to enable selective axial displacement of the first infusion tube through the second drainage tube;

a first valve positioned circumferentially around a portion of the first infusion tube to secure the first infusion tube relative to the connector assembly, wherein the first valve is a passive valve; and

a second valve positioned circumferentially around another portion of the first infusion tube to secure the first infusion tube relative to the connector assembly, wherein the second valve comprises at least one sensor configured to provide feedback regarding the securement of the first infusion tube relative to the second valve.

2 . The dual lumen coaxial cannula assembly of claim 1 , wherein the first valve is positioned at or near a location where the inlet portion and the outlet portion meet to form the common lumen portion.

3 . The dual lumen coaxial cannula assembly of claim 1 , wherein the second valve is configured as an active valve.

4 . The dual lumen coaxial cannula assembly of claim 3 , wherein the second valve is a Tuohy-Borst valve.

5 . The dual lumen coaxial cannula assembly of claim 1 , wherein the first infusion tube comprises at least a first magnet of a first polarity and a second magnet of the first polarity positioned along the first elongate body, and further wherein the second drainage tube comprises a third magnet of a second polarity positioned proximate to a distal end thereof.

6 . The dual lumen coaxial cannula assembly of claim 5 , wherein the first magnet is positioned to represent a distal length limit of the first infusion tube and the second magnet is positioned to represent a proximal length limit of the first infusion tube.

7 . The dual lumen coaxial cannula assembly of claim 5 , further comprising at least one intermediate magnet positioned between the first magnet and the second magnet on the first infusion tube.

8 . The dual lumen coaxial cannula assembly of claim 1 , wherein the first infusion tube includes a plurality of infusion apertures provided at the distal end, the infusion apertures extending through the sidewall of the first infusion tube.

9 . The dual lumen coaxial cannula assembly of claim 1 , wherein the second drainage tube includes a plurality of drainage apertures provided at the distal end, the drainage apertures extending through the sidewall of the second drainage tube.

10 . A dual lumen coaxial cannula assembly comprising:

a second drainage tube co-axially aligned with the first infusion tube and having a second elongate body with a second lumen defined by a space between the first infusion tube and the second drainage tube, the second drainage tube having a proximal end, a distal end, and a sidewall extending circumferentially therebetween;

a connector assembly, wherein the connector assembly comprises a common lumen portion in fluid communication with the second lumen, the proximal end of the second drainage tube being coupled to the common lumen portion, an outlet portion extending proximally from the common lumen portion and in fluid communication with the second lumen, and an inlet portion extending proximally from the common lumen;

a first valve positioned within the connector assembly at or near a location where the inlet portion and the outlet portion meet to form the common lumen portion;

an embolic protection device positioned between the first valve and the second valve of the connector assembly;

wherein a proximal end portion of the first infusion tube extends proximal of the common lumen portion and through the inlet portion without extending through the outlet portion;

wherein the first infusion tube is axially displaceable within the second drainage tube, and wherein the connector assembly is configured to enable selective axial displacement of the first infusion tube through the second drainage tube.

11 . The dual lumen coaxial cannula assembly of claim 10 , wherein the first valve is positioned circumferentially around the proximal end portion of the first infusion tube to secure the first infusion tube relative to the connector assembly, wherein the first valve is a passive valve.

12 . The dual lumen coaxial cannula assembly of claim 10 , wherein the first infusion tube comprises at least a first magnet of a first polarity and a second magnet of the first polarity positioned along the first elongate body, and further wherein the second drainage tube comprises a third magnet of a second polarity positioned proximate to a distal end thereof.

13 . The dual lumen coaxial cannula assembly of claim 12 , wherein the first magnet is positioned to represent a distal length limit of the first infusion tube and the second magnet is positioned to represent a proximal length limit of the first infusion tube.

14 . The dual lumen coaxial cannula assembly of claim 10 , wherein:

the first infusion tube includes a plurality of infusion apertures provided at the distal end, the infusion apertures extending through the sidewall of the first infusion tube; and

the second drainage tube includes a plurality of drainage apertures provided at the distal end, the drainage apertures extending through the sidewall of the second drainage tube.

15 . A dual lumen coaxial cannula assembly comprising:

a first valve positioned within the connector assembly at or near a location where the inlet portion and the outlet portion meet to form the common lumen portion;

wherein a proximal end portion of the first infusion tube extends proximal of the common lumen portion and through the inlet portion without extending through the outlet portion;

wherein the first infusion tube comprises at least a first magnet of a first polarity and a second magnet of the first polarity positioned along the first elongate body, and further wherein the second drainage tube comprises a third magnet of a second polarity positioned proximate to a distal end thereof.

16 . The dual lumen coaxial cannula assembly of claim 15 , wherein the first magnet is positioned to represent a distal length limit of the first infusion tube and the second magnet is positioned to represent a proximal length limit of the first infusion tube.

17 . The dual lumen coaxial cannula assembly of claim 15 , wherein the first valve is positioned circumferentially around the proximal end portion of the first infusion tube to secure the first infusion tube relative to the connector assembly, wherein the first valve is a passive valve.

18 . The dual lumen coaxial cannula assembly of claim 15 , wherein:

the first infusion tube includes a plurality of infusion apertures provided at the distal end, the infusion apertures extending through the sidewall of the first infusion tube; and

the second drainage tube includes a plurality of drainage apertures provided at the distal end, the drainage apertures extending through the sidewall of the second drainage tube.