Prediction, visualization, and control of drug delivery by multiple infusion pumps

Patent metadata

Field	Value
Publication number	US-10758672-B2
Application number	US-201515310313-A
Country	US
Kind code	B2
Filing date	May 14, 2015
Priority date	May 15, 2014
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

The subject technology is embodied in a method for predicting a delivery rate of a plurality of drugs dispensed by multiple infusion pumps at a delivery point. The method includes receiving one or more operating parameters related to multiple drug pumps and a carrier fluid pump, wherein each of the drug pumps dispenses a drug, and the carrier fluid pump dispenses a carrier fluid. The method also includes determining a delivery rate of a first drug at the delivery point. This can be done by predicting time variation of a concentration of the first drug at the delivery point based on a mathematical model of a mixed flow through a fluid path that terminates at the delivery point. The mixed flow includes the drugs and the carrier fluid. The model includes the operating parameters and a plurality of flow-parameters related to the mathematical model of the mixed flow.

First claim

What is claimed is:

1. A method comprising:
receiving, at a processing device, one or more operating parameters related to:
a first drug pump that dispenses, into a fluid path, a first drug,
at least a second drug pump that dispenses, into the fluid path, at least a second drug, and
a carrier fluid pump that dispenses, into the fluid path, a carrier fluid,
wherein the fluid path carries a mixed flow comprising the first drug, the second drug, and the carrier fluid;

determining, by the processing device, a delivery rate of the first drug at a delivery point by predicting time variation of a concentration of the first drug at the delivery point based at least on a mathematical model of the mixed flow, wherein the mathematical model includes the one or more operating parameters and a plurality of flow parameters related to propagation of the mixed flow; and
varying, by the processing device in response to a target delivery rate of the first drug being greater than the determined delivery rate of the first drug, a first drug flow rate of the first drug to be higher than a corresponding a target first drug flow rate associated with the target delivery rate of the first drug while maintaining a concentration of the first drug at a target drug concentration and while varying a second drug flow rate of the second drug relative to a target second drug flow rate and a carrier fluid flow rate of the carrier fluid relative to a target carrier fluid flow rate such that a delivery rate of the second drug is maintained within an allowable range.

2. The method of claim 1 , further comprising controlling the first drug flow rate and the carrier fluid flow rate such that a particular drug delivery profile for the first drug is achieved at a future time point.

3. The method of claim 1 , further comprising determining the first drug flow rate and the carrier fluid flow rate at a given time point such that a particular drug delivery profile for the first drug is achieved at a future time point.

4. The method of claim 1 , further comprising receiving data indicative of a flow rate of the mixed flow at a particular portion of a delivery path to the delivery point.

5. The method of claim 1 , further comprising triggering at least one alarm upon detecting that at least one of i) a current flow rate for the first drug, ii) a current flow rate for the second drug, iii) a current flow rate for the carrier fluid, or iv) a predicted drug delivery profile is outside a corresponding pre-defined desired or safe range.

6. The method of claim 1 , wherein the mathematical model includes one or more user-input parameters on a flow of the first drug, a flow of the second drug, or a flow of the carrier fluid.

7. The method of claim 1 , wherein the plurality of flow parameters related to the propagation of the mixed flow includes parameters characterizing one or more of i) radial diffusion, ii) axial diffusion, iii) laminar flow through the fluid path, or iv) a physical or chemical property of the first drug or the second drug.

8. The method of claim 1 , wherein the mathematical model includes structural parameters representing characteristics of at least one of the first drug pump, the second drug pump, the carrier fluid pump, or the fluid path.

9. The method of claim 8 , wherein the structural parameters include a dead volume associated with the fluid path.

10. The method of claim 9 , wherein the dead volume is empirically determined by examining a series of candidate empirical dead volumes and selecting one that best fits a control curve in a least squares sense.

11. The method of claim 8 , further comprising accessing a storage device that stores the structural parameters.

12. The method of claim 1 , further comprising identifying at least one of the first drug pump, the second drug pump, the carrier fluid pump, or the fluid path based on an identifier.

13. The method of claim 12 , wherein the identifier is a radio frequency identification (RFID) tag or a barcode.

14. The method of claim 1 , wherein varying the second drug flow rate to be relative the target second drug flow rate comprises varying the second drug flow rate to be higher than the target second drug flow rate.

15. A method comprising:
receiving, at a processing device, information on drug flow rates related to multiple drug pumps that dispense at least two drugs and information on a carrier fluid flow rate related to a carrier fluid pump that dispenses a carrier fluid flow, the multiple drug pumps comprising a first drug pump that dispenses a first drug flow comprising a first drug of the at least two drugs and a second drug pump that dispenses a second drug flow comprising a second drug of the at least two drugs, and the drug flow rates comprising a first drug flow rate for the first drug flow and a second drug flow rate for the second drug flow; and
controlling, by the processing device, a delivery profile of the at least two drugs at a delivery point by adjusting the drug flow rates of the at least two drugs and the carrier fluid flow rate, wherein adjusting the drug flow rates of the at least two drugs and the carrier fluid flow rate comprises:
varying, by the processing device, the first drug flow rate to be higher than a corresponding a target first drug flow rate associated with a target delivery rate of the first drug while maintaining a concentration of the first drug at a target drug concentration and while varying the second drug flow rate relative to a target second drug flow rate and the carrier fluid flow rate of the carrier fluid relative to a target carrier fluid flow rate such that a delivery rate of the second drug is maintained within an allowable range.

16. The method of claim 15 , wherein controlling the delivery profile comprises controlling the delivery profile to achieve the delivery profile at a future time point.

17. The method of claim 15 , further comprising determining the drug flow rates and the carrier fluid flow rate at a given time point such that the delivery profile is achieved at a future time point.

18. The method of claim 15 , further comprising receiving data indicative of a flow rate of a mixed flow comprising the first drug flow, the second drug flow, and the carrier fluid flow at a particular portion of a delivery path to the delivery point.

19. The method of claim 15 , further comprising triggering at least one alarm upon detecting that at least one of i) a current drug flow rate for the first drug flow, ii) a current drug flow rate for the second drug flow, iii) a current carrier fluid flow rate for the carrier fluid flow, or iv) a predicted drug delivery profile is outside a corresponding pre-defined desired or safe range.

20. The method of claim 15 , wherein controlling the delivery profile comprises controlling the delivery profile based at least on a mathematical model of a mixed flow through a fluid path that terminates at a delivery point for the at least two drugs, the mixed flow comprising the at least two drugs and the carrier fluid, and the mathematical model including one or more operating parameters and a plurality of flow parameters related to propagation of the mixed flow.

21. The method of claim 20 , wherein the mathematical model includes one or more user-input parameters on at least one of the first drug flow, the second drug flow, or the carrier fluid flow.

Assignees

• Massachusetts Gen Hospital

Inventors

• Peterfreund Robert A
• Parker Michael
• Lovich Mark A
• Sims Nathaniel M

Classifications

• A61M2205/52

  with memories providing a history of measured variating parameters of apparatus or patient · CPC title

• A61M2205/581

  by audible feedback · CPC title

• A61M2205/50

  with microprocessors or computers · CPC title

• G16H20/17

  delivered via infusion or injection · CPC title

• A61M2205/3379

  Masses, volumes, levels of fluids in reservoirs, flow rates · CPC title