Fluid Conveyance Safety Devices, Methods, and Systems

Patent metadata

Field	Value
Publication number	US-2019344007-A1
Application number	US-201916520944-A
Country	US
Kind code	A1
Filing date	Jul 24, 2019
Priority date	Oct 26, 2010
Publication date	Nov 14, 2019
Grant date	—

Abstract

A vascular access device may include a blood circuit having an arterial blood line and a venous blood line. The venous blood line is connected to a first access needle and the arterial blood line is connected to a second access needle. The venous blood line is connected to an access component affixed to the second access needle and configured such that when the second access needle is used to infuse blood into a patient, the access component is positioned to withdraw blood and convey it into the venous line. The withdrawn blood may also be conveyed to an air detector to detect withdrawal of the second access needle.

First claim

What is claimed is:

1 . A needle set for a two needle vascular access, comprising:
a first dual-lumen needle with arterial and venous ports; a second dual-lumen needle with arterial and venous ports; an arterial line with an arterial connector connected to the first and second dual-lumen needle arterial ports; and a venous line with an venous connector connected to the first and second dual-lumen needle venous ports.

2 . The needle set according to claim 1 , wherein the needles have blunt tips suitable for buttonhole access.

3 . The needle set according to claim 2 wherein the arterial port(s) are connected to an annular spaced between inner and outer cannulas of the dual-lumen needle(s).

4 . The needle set according to claim 3 wherein the arterial port(s) are connected to an annular spaced between inner and outer cannulas of the dual-lumen needle(s).

5 . The needle set according to claim 1 wherein the dual-lumen needles have an inner cannula extending beyond an outer cannula.

6 . The needle set according to claim 5 wherein the arterial port(s) are connected to an annular spaced between inner and outer cannulas of the dual-lumen needle(s).

7 . The needle set according to claim 1 wherein the arterial port(s) are connected to an annular spaced between inner and outer cannulas of the dual-lumen needle(s).

8 . The needle set according to claim 1 , wherein the each of the first and second dual-lumen needles comprises:
a first resin winged hub and a first metal cannula, the first winged hub having a first hub port; a second resin winged hub and a second metal cannula, the second winged hub having a second hub port; the first needle set cannula being larger than the second; the first and second needle set winged hubs each having first and second cylindrical portions, the first extending along a base of the respective cannula and the second extending away from the respective cannula and forming an opening adapted for receiving a tube; a junction part having first and second recessed ports sized and shaped to receive the first and second cylindrical portions; the first needle set second cylindrical portion being inserted in the junction part first recessed port and the second needle set first cylindrical portion being inserted in the junction part second recessed port such that the second metal cannula extends into the first metal cannula; the junction part having a third recessed port in fluid communication a channel that includes an annular spaced between the first and second metal cannulas, the channel being fluidly isolated from the lumen of the second metal cannula; the junction part further being configured that the second hub port is available for direct connection to a tube to form a channel with the lumen of the second metal cannula and the third recessed port is available for connection to another tube.

9 . A dual-lumen needle, comprising:
an inner cannula having an inner lumen; an outer cannula having an inner lumen; a hub having first and second ports, the hub being configured to support the inner and outer cannulas with the outer cannula in coaxial relation to the inner cannula thereby defining an annular channel between the inner and outer cannulas; the hub being further configured to define a first fluid channel connecting the first port with the inner cannula inner lumen and second fluid channel connecting the annular channel to the second port; wherein the inner and outer cannulas are blunt tip needles adapted for use with buttonhole-type vascular accesses and the inner cannula extends through and beyond the outer cannula at a distal end thereof extending away from the hub.

10 . The dual-lumen needle of claim 9 , wherein the hub is a rigid structure such that the inner and outer cannulas are held in fixed relation to each other.

11 . The dual-lumen needle of claim 10 , wherein the inner and outer cannulas are metal and the hub is of resin.

12 . The dual-lumen needle of claim 10 wherein the hub has a T shape with one of the first and second ports on a crossbar opposite the inner and outer cannulas and the other of the first and second ports on a stem of the hub.

13 . The dual-lumen needle of claim 9 , wherein the inner and outer cannulas are metal and the hub is of resin.

14 . The dual-lumen needle of claim 13 wherein the hub has a T shape with one of the first and second ports on a crossbar opposite the inner and outer cannulas and the other of the first and second ports on a stem of the hub.

15 . The dual-lumen needle of claim 9 wherein the hub has a T shape with one of the first and second ports on a crossbar opposite the inner and outer cannulas and the other of the first and second ports on a stem of the crossbar.

16 . The dual-lumen needle of claim 9 wherein the hub has a Y shape.

17 . A vascular access device, comprising:
a blood circuit having an arterial blood line and a venous blood line; the venous blood line being connected to a first access needle and the arterial blood line being connected to a second access needle; the venous blood line being connected to an access component affixed to the second access needle and configured such that when the second access needle is used to infuse blood into a patient, the access component is positioned to withdraw blood and convey it into the venous line.

18 . The vascular access device of claim 17 , wherein second access needle is a dual-lumen needle and the access component is a lumen of the dual-lumen needle.

19 . The vascular access device of claim 17 , wherein the access component is further configured to convey withdrawn blood to an air detector.

Assignees

• Nxstage Medical Inc

Inventors

• Turk Jr Joseph E
• Burbank Jeffrey H
• Brugger James M

Classifications

• A61M1/3659 Primary

  Cannulae pertaining to extracorporeal circulation · CPC title

• Y10T29/49879

  Spaced wall tube or receptacle · CPC title

• A61M2005/1588

  having means for monitoring, controlling or visual inspection, e.g. for patency check, avoiding extravasation · CPC title

• A61M5/3243

  being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel (devices for protecting guide needles in combination with catheters A61M25/0612) · CPC title

• A61M1/3656

  Monitoring patency or flow at connection sites; Detecting disconnections · CPC title