Vascular access assembly declotting systems and methods

Patent metadata

Field	Value
Publication number	US-11026704-B2
Application number	US-201815910273-A
Country	US
Kind code	B2
Filing date	Mar 2, 2018
Priority date	Mar 6, 2017
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

Methods of declotting vascular access technologies, such as vascular access assemblies that facilitate hemodialysis, are provided. The methods can include disposing a catheter within a patient to access a vascular access assembly within the heart of the patient. The catheter can be coupled to the vascular access assembly such that a clot can be evacuated from within the vascular access assembly via the catheter.

First claim

The invention claimed is:

1. A method of declotting a vascular access assembly within a patient, the method comprising:
inserting a central end portion of a catheter into the patient such that the central end portion of the catheter is disposed within the vasculature of the patient;
coupling the central end portion of the catheter to a central end portion of a vascular access assembly disposed within the vasculature of the patient,
wherein the vascular access assembly is completely disposed within the patient, and
wherein the coupling occurs within the vasculature of the patient; and
evacuating a clot from within a portion of the vascular access assembly via the catheter.

2. The method of claim 1 , further comprising:
applying a suction force on the catheter such that a portion of the suction force is applied on the vascular access assembly to evacuate the clot.

3. The method of claim 1 , further comprising:
flushing a portion of the vascular access assembly such that the clot is displaced from within the vascular access assembly to a lumen of the catheter.

4. The method of claim 1 , further comprising:
displacing the clot from within the vascular access assembly to a lumen of the catheter; and
macerating a portion of the clot as the clot is displaced from within the vascular access assembly to the lumen of the catheter.

5. The method of claim 1 , wherein the central end portion of the catheter is disposed within the right atrium via a jugular vein.

6. The method of claim 1 , wherein the central end portion of the catheter is disposed within the right atrium via a femoral vein.

7. The method of claim 1 , wherein an internal diameter of a portion of the central end portion of the catheter is greater than an external diameter of a portion of the central end portion of the vascular access assembly such that the portion of the central end portion of the catheter is displaceable around the portion of the central end portion of the vascular access assembly.

8. The method of claim 1 , wherein the coupling of the central end portion of the catheter to the central end portion of the vascular access assembly forms a substantially fluid-tight seal.

9. The method of claim 1 , wherein the central end portion of the catheter is substantially J shaped.

10. The method of claim 1 , wherein the central end portion of the catheter is substantially funnel shaped.

11. The method of claim 1 , wherein the central end portion of the catheter comprises a purse string mechanism such that the central end portion of the catheter is transitionable between an open state and a closed state and wherein the central end portion of the catheter is configured to form a seal between an inside surface of the central end portion of the catheter and an outside surface of the central end portion of the vascular access assembly when in the closed state.

12. The method of claim 1 , wherein the vascular access assembly comprises:
a first tubular conduit having a central end portion disposed within a heart of the patient; and
a second tubular conduit having a peripheral end coupled to a vessel of the patient, wherein a peripheral end of the first tubular conduit is releasably coupled to a central end portion of the second tubular conduit such that a flow path extends from the vessel to the heart via the first and second tubular conduits.

13. The method of claim 12 , wherein the vascular access assembly further comprises an adaptor for releasably coupling the first tubular conduit to the second tubular conduit.

14. The method of claim 13 , further comprising:
decoupling the first tubular conduit and the second tubular conduit at the adaptor;
coupling a flushing mechanism to the peripheral end of the first tubular conduit; and
flushing the first tubular conduit such that the clot is displaced from within the first tubular conduit to a lumen of the catheter.

15. A method of removing a clot from a vascular access assembly within a patient, the method comprising:
accessing an internal jugular vein of the patient;
inserting a central end portion of a catheter into the internal jugular vein;
displacing the catheter such that the central end portion of the catheter is disposed within a vena cava or right atrium of a heart of the patient;
coupling the central end portion of the catheter to a central end portion of a vascular access assembly disposed within the vena cava or right atrium,
wherein the vascular access assembly is a fully subcutaneous implant, and
wherein the coupling occurs within the vena cava or right atrium; and
evacuating a clot from within a portion of the vascular access assembly via the catheter.

16. The method of claim 15 , wherein displacing the catheter such that the central end portion of the catheter is disposed within the vena cava or right atrium comprises displacing the central end portion of the catheter through the internal jugular vein, a brachiocephalic vein, and a superior vena cava of the patient.

17. The method of claim 16 , wherein the central end portion of the catheter is substantially J shaped such that the central end portion of the catheter is disposable around the central end portion of the vascular access assembly.

18. The method of claim 15 , further comprising:
sucking the clot from within the vascular access assembly and through the catheter to evacuate the clot from within the vascular access assembly.

19. A method of removing a clot from a vascular access assembly within a patient, the method comprising:
accessing a femoral vein of the patient;
inserting a central end portion of a catheter into the femoral vein;
displacing the catheter such that the central end portion of the catheter is disposed within a vena cava or right atrium of a heart of the patient;
coupling the central end portion of the catheter to a central end portion of a vascular access assembly disposed within the vena cava or right atrium,
wherein the vascular access assembly is a fully subcutaneous implant, and
wherein the coupling occurs within the vena cava or right atrium; and
evacuating a clot from within a portion of the vascular access assembly via the catheter.

20. The method of claim 19 , wherein displacing the catheter such that the central end portion of the catheter is disposed within the vena cava or right atrium comprises displacing the central end portion of the catheter through the femoral vein, an external iliac vein, a common iliac vein, and an inferior vena cava of the patient.

Assignees

• Merit Medical Systems Inc

Inventors

• Hall John William
• Nordhausen Craig

Classifications

• A61M1/3655 Primary

  Arterio-venous shunts or fistulae · CPC title

• A61M25/0068

  Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure · CPC title

• A61B2017/320775

  Morcellators, impeller or propeller like means · CPC title

• A61B17/320758

  with a rotating cutting instrument, e.g. motor driven (A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002) · CPC title

• A61M2025/0019

  Cleaning catheters or the like, e.g. for reuse of the device, for avoiding replacement · CPC title