Systems and methods for using nitric oxide in dialysis

Patent metadata

Field	Value
Publication number	US-2025041496-A1
Application number	US-202418886509-A
Country	US
Kind code	A1
Filing date	Sep 16, 2024
Priority date	Dec 16, 2022
Publication date	Feb 6, 2025
Grant date	—

Abstract

A hemodiafiltration (HDF) system is provided for performing HDF treatment. The HDF system includes a mixing system for mixing nitric oxide (NO) with other chemicals to produce a dialysis fluid. The HDF system further includes an extracorporeal blood circuit that includes a filter for separating the dialysis fluid into a dialysate and NO spiked substitution fluid. The extracorporeal blood circuit also includes a dialyzer that receives the dialysate and a blood line connected to the dialyzer. The blood line includes admission points connected to the filter. The admission points are used to administer the NO spiked substitution fluid to the patient during the HDF treatment.

First claim

1 . A method for performing hemodiafiltration (HDF) treatment, comprising:
producing dialysis fluid comprising nitric oxide (NO) for performing the HDF treatment for a patient; and performing the HDF treatment for the patient using an HDF system, wherein the HDF system comprises extracorporeal circuits, wherein the extracorporeal circuits comprise a filter for separating the dialysis fluid into a dialysate and NO spiked substitution fluid, a dialyzer for receiving the dialysate from the filter, and a blood line connected to the dialyzer and comprising one or more admission points for administering the NO spiked substitution fluid during the HDF treatment.

2 . The method of claim 1 , wherein the blood line comprises an arterial blood line and a venous blood line, wherein the arterial blood line feeds blood from the patient to a blood chamber of the dialyzer, wherein the venous blood line provides the blood of the patient from the blood chamber back to the patient, wherein the one or more admission points is an arterial admission point that is on the arterial blood line, and
wherein performing the HDF treatment for the patient comprises:
performing pre-dilution HDF treatment based on using the arterial admission point to provide the NO spiked substitution fluid prior to the blood chamber.

3 . The method of claim 1 , wherein the blood line comprises an arterial blood line and a venous blood line, wherein the arterial blood line feeds blood from the patient to a blood chamber of the dialyzer, wherein the venous blood line provides the blood of the patient from the blood chamber back to the patient, wherein the one or more admission points is a venous admission point that is on the venous blood line, and
wherein performing the HDF treatment for the patient comprises:
performing post-dilution HDF treatment based on using the venous admission point to provide the NO spiked substitution fluid after the blood chamber.

4 . The method of claim 1 , wherein the filter comprises a membrane, a first chamber, and a second chamber, and wherein the filter is configured to separate the dialysis fluid by having a first portion of the dialysis fluid not pass through the membrane and remain in the first chamber and a second portion of the dialysis fluid pass through the membrane to enter the second chamber, wherein the first portion of the dialysis fluid is the dialysate and the second portion of the dialysis fluid is the NO spiked substitution fluid.

5 . The method of claim 4 , wherein the extracorporeal blood circuit further comprises a dialysate line that connects the first chamber of the filter to the dialyzer and a substitution fluid line that connects the second chamber of the filter to the one or more admission points.

6 . The method of claim 1 , wherein producing the dialysis fluid comprising the NO for performing the HDF treatment for the patient comprises:
providing instructions to a nitric oxide source to dispense a set amount of NO to a mixing chamber, wherein the nitric oxide source provides nitric oxide in a gaseous form.

7 . The method of claim 1 , wherein producing the dialysis fluid comprising the NO for performing the HDF treatment for the patient comprises:
providing instructions to a nitric oxide source to dispense a set amount of NO to a mixing chamber, wherein the nitric oxide source provides nitric oxide in a liquid form.

8 . The method of claim 1 , wherein the extracorporeal blood circuit further comprises a pump configured to pump the NO spiked substitution fluid into the one or more admission points, and
wherein providing the instructions to the extracorporeal blood circuit to perform the HDF treatment comprises controlling a rate that the pump supplies the NO spiked substitution fluid into the one or more admission points.

9 . A hemodiafiltration (HDF) system for performing HDF treatment, comprising:
a mixing system, comprising:
a chemical dispenser configured to provide chemicals to a mixing chamber; and
the mixing chamber configured to mix the chemicals to produce a dialysate;
an extracorporeal blood circuit, comprising:
a dialyzer configured to receive the dialysate from the mixing chamber; and
a blood line connected to the dialyzer and comprising one or more admission points, wherein nitric oxide (NO) spiked substitution fluid is administered during the HDF treatment using the one or more admission points; and
a controller configured to:
provide instructions to the mixing system to produce the dialysate; and
provide instructions to the extracorporeal blood circuit to perform the HDF treatment using the dialysate and the NO spiked substitution fluid.

10 . The HDF system of claim 9 , wherein the blood line comprises an arterial blood line and a venous blood line, wherein the arterial blood line feeds blood from the patient to a blood chamber of the dialyzer, wherein the venous blood line provides the blood of the patient from the blood chamber back to the patient, and
wherein the one or more admission points is an arterial admission point that is on the arterial blood line and configured to provide the NO spiked substitution fluid prior to the blood chamber for pre-dilution HDF treatment.

11 . The HDF system of claim 9 , wherein the blood line comprises an arterial blood line and a venous blood line, wherein the arterial blood line feeds blood from the patient to a blood chamber of the dialyzer, wherein the venous blood line provides the blood of the patient from the blood chamber back to the patient, and
wherein the one or more admission points is a venous admission point that is on the venous blood line and configured to provide the NO spiked substitution fluid after the blood chamber for post-dilution HDF treatment.

12 . The HDF system of claim 9 , wherein the NO spiked substitution fluid comprises nitric oxide that is from a nitric oxide source, and wherein the nitric oxide source provides the nitric oxide in a liquid form.

13 . The HDF system of claim 9 , wherein the NO spiked substitution fluid comprises nitric oxide that is from a nitric oxide source, and wherein the nitric oxide source provides nitric oxide in a gaseous form.

14 . The HDF system of claim 9 , wherein the extracorporeal blood circuit further comprises:
a pump configured to pump the NO spiked substitution fluid into the one or more admission points, and wherein providing the instructions to the extracorporeal blood circuit to perform the HDF treatment comprises controlling a rate that the pump supplies the NO spiked substitution fluid into the one or more admission points.

15 . A hemodiafiltration (HDF) system for performing HDF treatment, comprising:
a controller configured to:
provide instructions to produce dialysate; and
provide instructions to perform the HDF treatment using the dialysate and nitric oxide (NO) spiked substitution fluid; and
an extracorporeal blood circuit, comprising:
a dialyzer configured to receive the dialysate; and
a blood line connected to the dialyzer and comprising one or more admission points for administering the NO spiked substitution fluid during the HDF treatment.

16 . The HDF system of claim 15 , wherein the blood line comprises an arterial blood line and a venous blood line, and
wherein the one or more admission points is an arterial admission point that is on the arterial blood line and configured to administer the NO spiked substitution fluid prior to the dialyzer for pre-dilution HDF treatment.

17 . The HDF system of claim 15 , wherein the blood line comprises an arterial blood line and a venous blo

Assignees

• Fresenius Medical Care Holdings Inc

Inventors

• Crook Nathan
• Andersen Ryan
• Colvin Kylie

Classifications

• B01D61/243

  Dialysis · CPC title

• A61M2202/0275

  Nitric oxide [NO] · CPC title

• A61M1/3413

  Diafiltration · CPC title

• A61M1/3479

  by dialysing the filtrate · CPC title

• A61M1/3455

  Substitution fluids · CPC title