Adaptive system for blood fluid removal

Patent metadata

Field	Value
Publication number	US-9750862-B2
Application number	US-201213424533-A
Country	US
Kind code	B2
Filing date	Mar 20, 2012
Priority date	Apr 29, 2011
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

Methods for monitoring patient parameters and blood fluid removal system parameters include identifying those system parameters that result in improved patient parameters or in worsened patient parameters. By comparing the patient's past responses to system parameters or changes in system parameters, a blood fluid removal system may be able to avoid future use of parameters that may harm the patient and may be able to learn which parameters are likely to be most effective in treating the patient in a blood fluid removal session.

First claim

What is claimed is:

1. A method carried out by a blood fluid removal system, comprising:
initiating a blood fluid removal session, using a blood fluid removal device, with initial system parameters;
acquiring a first set of data regarding one or more patient physiological parameters, wherein the one or more patient physiological parameters include at least one of pH and concentration of an electrolyte;
storing the first data set in a most effective to date data set memory;
associating the initial system parameters in an increased effectiveness lookup table with the first data set;
adjusting at least one parameter of the blood fluid removal session by adjusting the blood fluid removal system to arrive at adjusted system parameters;
acquiring a second set of data regarding the one or more patient physiological parameters after the at least one parameter of the blood fluid removal session has been adjusted; and
determining which of the first and second set of data includes at least one value closer to a target value; storing in the increased effectiveness lookup table data regarding the data set having at least one value closer to the target value; and associating data regarding the adjusted system parameters with the data set having at least one value closer to the target value; and
repeating the process beginning with acquiring a first set of data regarding one or more patient physiological parameters;
storing the first data set in a least effective to date data set memory;
associating the initial system parameters in a decreased effectiveness lookup table with the first data set prior to adjusting the at least one parameter of the blood fluid removal session;
determining which of the first and second set of data includes at least one value further from the target value; storing in the decreased effectiveness lookup table data regarding the data set having at least one value further from the target value; and associating data regarding the adjusted system parameters with the data set having at least one value further from to the target value;
replacing the data in the least effective to date data set with the data from the data set having at least one value further from the target value; and
continuing the blood fluid removal session with the system parameters in the most effective to date data set;
wherein the blood fluid removal system performs at least one blood fluid removal process selected from the group consisting of ultrafiltration, hemofiltration, hemodialysis, hemodiafiltration and peritoneal dialysis.

2. The method of claim 1 , further comprising:
further adjusting at least one parameter of the blood fluid removal session to arrive at further adjusted system parameters;
acquiring a third set of data regarding the one or more patient physiological parameters after the at least one parameter of the blood fluid removal session has been further adjusted; and
determining which of the first and third sets of data includes at least one value and storing in the increased effectiveness lookup table data regarding the data set and associating data regarding the further adjusted system parameters with the data set having at least one value closer to the target value.

3. The method of claim 1 , further comprising:
further adjusting at least one parameter of the blood fluid removal session to arrive at further adjusted system parameters;
acquiring a fourth set of data regarding the one or more patient physiological parameters after the at least one parameter of the blood fluid removal session has been further adjusted; and
determining which of the first, second and fourth set of data includes at least one value further from the target value; and storing in the decreased effectiveness lookup table data regarding the data set having at least one value further from the target value and associating data regarding the further adjusted system parameters with the data set having at least one value further from the target value.

4. The method of claim 1 , further comprising:
acquiring a fifth set of data regarding one or more patient physiological parameters;
comparing the fifth data set to the increased effectiveness lookup table; and
determining whether at least one parameter of the data set stored in the increased effectiveness table is within a predetermined range of the fifth data set; and adjusting the system parameters associated with the data set stored in the increased effectiveness lookup table if the at least one parameter of the data set stored in the increased effectiveness lookup table is within the predetermined range of the fifth data set.

5. The method of claim 1 , further comprising:
stopping the blood fluid removal session;
acquiring a sixth set of data regarding one or more patient physiological parameters;
comparing the sixth data set to the increased effectiveness lookup table; and
initiating a second blood fluid removal session with the system parameters associated with the data set stored in the increased effectiveness lookup table if at least one parameter of a data set stored in the increased effectiveness lookup table is within a predetermined range of at least one parameter of the sixth data set.

6. The method of claim 1 , wherein the at least one of the one or more patient parameters also include at least one parameter selected from the group consisting of blood pressure and heart rate.

7. The method of claim 1 , wherein the electrolyte is potassium.

8. The method of claim 1 , wherein the system parameters comprise one or more of fluid removal rate and concentration of one or more electrolyte.

9. A non-transitory computer-readable medium comprising instructions that, when executed by a blood fluid removal device, cause the device to
initiate a blood fluid removal session with initial system parameters;
acquire a first set of data regarding one or more patient physiological parameters, wherein the one or more patient physiological parameters include at least one of pH and concentration of an electrolyte;
store the first data set in a most effective to date data set memory;
associate the initial system parameters in an increased effectiveness lookup table with the first data set;
adjust at least one parameter of the blood fluid removal session by adjusting the blood fluid removal system to arrive at adjusted system parameters;
acquire a second set of data regarding the one or more patient physiological parameters after the at least one parameter of the blood fluid removal session has been adjusted; and
determine which of the first and second set of data includes at least one value closer to a target value; store in the increased effectiveness lookup table data regarding the data set having at least one value closer to the target value; and associate data regarding the adjusted system parameters with the data set having at least one value closer to the target value;
repeat the process beginning with acquiring a first set of data regarding one or more patient physiological parameters;
store the first data set in a least effective to date data set memory;
associate the initial system parameters in a decreased effectiveness lookup table with the first data set prior to adjusting the at least one parameter of the blood fluid removal session;
determine which of the first and second set of data includes at least one value further from the target value; store in the decreased effectiveness lookup table data regarding the data set having at least one value further from the target value; and associate data regarding the adjusted system parameters with the data set having at least one value further from to the target value;
replace the data in the least effective to date data set with

Assignees

• Gerber Martin
• Burnes John
• Lyu Suping
• Manda Venkatesh R
• Pudil Bryant
• Medtronic Inc

Inventors

• Gerber Martin
• Burnes John
• Lyu Suping
• Manda Venkatesh R
• Pudil Bryant

Classifications

• A61B5/14546

  for measuring analytes not otherwise provided for, e.g. ions, cytochromes · CPC title

• A61B5/14535

  for measuring haematocrit · CPC title

• B01D2321/12

  Use of permeate · CPC title

• A61B2560/0223

  of calibration, e.g. protocols for calibrating sensors · CPC title

• A61M2205/3523

  using telemetric means · CPC title