Infusion Pump System

• US 20150367068A1
• Filed: 09/01/2015
• Published: 12/24/2015
• Est. Priority Date: 09/12/2008
• Status: Abandoned Application

• Current Assignee: Sims Company
• Original Assignee: Sims Company
• Inventors: Kawamura, Yasuhiro
• Application Number:
  US14/842,670
• Publication Number:
  US 20150367068A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61M 2005/14208 with a programmable infusion control system, characterised by the infusion program
• CPC Class Codes: A61M 2205/0294 Piezoelectric materials
• CPC Class Codes: A61M 2205/3553 remote, e.g. between patient's home and doctor's office
• CPC Class Codes: A61M 2205/3592 using telemetric means, e.g. radio or optical transmission
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: A61M 2206/22 eliminating pulsatile flows, e.g. by the provision of a dampening chamber
• CPC Class Codes: A61M 5/1407 Infusion of two or more substances
• CPC Class Codes: A61M 5/1411 Drip chambers A61M5/162, A61M5/1689, A61M5/40 take precedence
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/145 using pressurised reservoirs, e.g. pressurised by means of pistons
• CPC Class Codes: A61M 5/165 Filtering accessories, e.g. blood filters, filters for infusion liquids A61M1/14 , A61M1/34, A61M1/3627, A61M1/3679, A61M1/3687 take precedence; needle sets with incorporated air inlet filters A61M5/162
• CPC Class Codes: A61M 5/16804 Flow controllers
• CPC Class Codes: A61M 5/16827 controlling delivery of multiple fluids, e.g. sequencing, mixing or via separate flow-paths infusion of multiple fluids without using a controller A61M5/1407
• CPC Class Codes: A61M 5/16877 Adjusting flow; Devices for setting a flow rate
• CPC Class Codes: A61M 5/16886 for measuring fluid flow rate, i.e. flowmeters
• CPC Class Codes: A61M 5/172 electrical or electronic A61M5/16804, A61M5/16831 take precedence
• CPC Class Codes: G16H 20/17 delivered via infusion or injection
• CPC Class Codes: G16H 40/67 for remote operation

Abstract

There is provided an infusion pump system for delivering a predetermined medical solution at a preset reference infusion speed. The system comprises a medical solution container; an infusion line through which the medical solution is drawn out of the medical solution container; an infusion pump configured to discharge the medical solution via the infusion line. The infusion pump is controlled so that the discharge speed of the infusion pump is computed on the basis of a current discharge speed of the infusion pump and the infusion speed of the medical solution, the resulting discharge speed is corrected by a predefined correction coefficient, and the medical solution is discharged at the corrected discharge speed.

Claims

1. An infusion pump system for infusion of a predetermined medical solution at a preset reference infusion speed, comprising:

(A) a medical solution container configured to contain the medical solution;

(B) an infusion line via which the medical solution is drawn from the medical solution container;

(C) an infusion pump configured to discharge the medical solution via the infusion line;

(D) a reference infusion speed storing unit configured to store the reference infusion speed;

(E) a correction coefficient storing unit configured to store a correction coefficient for use in correction of a variation in a discharge speed of the medical solution, the correction coefficient being predefined in accordance with a degree of medical effect of the medical solution;

(F) an infusion speed measurement unit configured to measure an infusion speed of the medical solution flowing through the infusion line;

(G) a discharge speed computation unit configured for discharge speed computation to compute a discharge speed of the infusion pump for infusion of the medical solution at the reference infusion speed, the discharge speed computation being made at predetermined intervals and with reference to

(i) a current discharge speed of the infusion pump,

(ii) the reference infusion speed stored in the reference infusion speed storing unit, and

(iii) the infusion speed of the medical solution measured by the infusion speed measurement unit;

(H) a discharge speed correction unit configured for discharge speed correction to correct the discharge speed that has been obtained as a result of the discharge speed computation by the discharge speed computation unit, the discharge speed correction being made with reference to

(i) the current discharge speed of the infusion pump and

(ii) the correction coefficient for the medical solution stored in the correction coefficient storing unit; and

(I) a control unit configured to control the infusion pump to make the infusion pump discharge the medical solution at the discharge speed that has been obtained as a result of the discharge speed correction by the discharge speed correction unit.

3. The infusion pump system according to claim 1, further comprising:

an information input unit into which information on an infusion target into which the medical solution is infused is input;

a medical solution information storing unit configured to store usage and dosage of the medical solution;

an infusion speed range computation unit configured for infusion speed range computation to compute an allowable range of the infusion speed for the medical solution, the infusion speed range computation being made with reference to

(i) the information input into the information input unit and

(ii) the usage and dosage of the medical solution stored in the medical solution information storing unit; and

a safe operation unit configured to perform a predefined safe operation when the discharge speed corrected by the discharge speed correction unit does not fall within the allowable range of the infusion speed for the medical solution computed by the infusion speed range computation unit.

4. The infusion pump system according to claim 3, wherein the safe operation unit is configured to trigger an alarm.

5. The infusion pump system according to claim 3, wherein the safe operation unit is configured to control the infusion pump to make the infusion pump discharge the medical solution at the discharge speed corrected by the discharge speed correction unit.

6. The infusion pump system according to claim 3, wherein the safe operation unit is configured to halt the infusion pump discharging the medical solution.

7. The infusion pump system according to claim 1, wherein the infusion pump includes a piezoelectric pump unit comprising at least one piezoelectric pump driven by a piezoelectric element.

8. The infusion pump system according to claim 7, wherein the infusion pump includes a plurality of the piezoelectric pump units arranged in parallel with each other;

a plurality of entry tubes via which the piezoelectric pump units are individually connected to the infusion line, the entry tubes having a cross section smaller than that of the infusion line; and

a bypass tube configured to connect the entry tubes to each other.

9. The infusion pump system according to claim 8, wherein the infusion pump comprises a plurality of groups of the piezoelectric pump units, and the control unit is configured to use different discharge timings to individually control the groups of the piezoelectric pump units.

10. The infusion pump system according to claim 7, further comprising:

a plurality of the medical solution containers each containing a corresponding each of a plurality of the medical solutions;

a plurality of the infusion lines via each of which a corresponding each of the medical solutions is drawn out of the corresponding each of the medical solution containers;

wherein the infusion pump includes one piezoelectric pump unit and a plurality of the entry tubes each connecting a corresponding each of the infusion lines to the piezoelectric pump unit, and a plurality of cut-off valves each provided in a corresponding each of the entry tubes and configured to block the medical solution drawn via the infusion line into the piezoelectric pump unit, and the control unit is configured to control opening and closing of the cut-off valves such that predefined amounts of the medical solutions are drawn into the piezoelectric pump unit from corresponding each of the entry tubes.

11. The infusion pump system according to claim 10, wherein the control unit is configured to close one of the cut-off valves when a predefined negative pressure avoidance time has elapsed after opening of another of the cut-off valves.

12. The infusion pump system according to claim 10, wherein the control unit is configured to intermittently open and close at least one of the cut-off valves each provided in corresponding each of the entry tubes.

13. The infusion pump system according to claim 10, further comprising a biometric information input unit into which biometric information is input, the biometric information being measured in the infusion target into which the medical solution is infused, wherein the control unit is configured to open and close a selected one of the cut-off valves on the basis of the biometric information input to the biometric information input unit.

14. The infusion pump system according to claim 1, further comprising a bypass unit configured to discharge the medical solution via the infusion line, the bypass unit bypassing the infusion pump.

15. The infusion pump system according to claim 1, wherein the infusion pump is arranged inside of the medical solution container such that the infusion pump is positioned inward with reference to the medical solution exit portion via which the infusion line is attached to the medical solution container.

16. The infusion pump system according to claim 15, further comprising a cylinder accommodating therein a medical solution container made of a flexible material;

and a plunger configured to compress the medical solution container accommodated in the cylinder, the cylinder including an air hole via which an inside thereof and an outside thereof are in communication with each other.

17. The infusion pump system according to claim 1, further comprising a deaerating unit provided downstream of the infusion pump and configured to remove an air bubble in the infusion line.

18. The infusion pump system according to claim 1, further comprising a condition input unit into which condition information is input, the condition information being indicative of a condition of the infusion target into which the medical solution is infused;

an information storing unit connected to the condition input unit via a communications device and configured to store the condition information input into the condition input unit; and

at least one information terminal unit connected to the information storing unit and configured to reference the condition information stored in the information storing unit.

2. An infusion pump system for infusion of a predetermined medical solution within a predefined infusion completion time, comprising:

(A) a medical solution container configured to contain the medical solution,

(B) an infusion line via which the medical solution is drawn from the medical solution container;

(C) an infusion pump configured to discharge the medical solution via the infusion line;

(D) a correction coefficient storing unit configured to store a correction coefficient for use in correction of a variation in a discharge speed of the medical solution, the correction coefficient being predefined in accordance with a degree of medical effect of the medical solution;

(E) a remaining amount detection unit configured to detect a remaining amount of the medical solution;

(F) a remaining time measurement unit configured to measure a remaining time before the infusion completion time is reached;

(G) a discharge speed computation unit configured for discharge speed computation to compute a discharge speed of the infusion pump for infusion of the medical solution within the infusion completion time, the discharge speed computation being made with reference to

(i) the remaining amount of the medical solution detected by the remaining amount detection unit and

(ii) the remaining time before the infusion completion time is reached measured by the remaining time measurement unit;

(H) a discharge speed correction unit configured for discharge speed correction to correct the discharge speed obtained as a result of the discharge speed computation by the discharge speed computation unit, the discharge speed correction being made with reference to

(i) a current discharge speed of the infusion pump and

(ii) the correction coefficient for the medical solution stored in the correction coefficient storing unit; and

(I) a control unit configured to control the infusion pump to make the infusion pump discharge the medical solution at the discharge speed that has been obtained as a result of the discharge speed correction by the discharge speed correction unit.