INFUSION CONTROL DEVICE

• US 20120053556A1
• Filed: 08/26/2010
• Published: 03/01/2012
• Est. Priority Date: 08/26/2010
• Status: Active Grant

• Current Assignee: B Braun Melsungen AG (B. Braun Holding GmbH & Co. KG)
• Original Assignee: B Braun Melsungen AG (B. Braun Holding GmbH & Co. KG)
• Inventors: Lee, Freddie Eng Hwee
• Granted Patent: US 9,132,233 B2
• Time in Patent Office: Days
• US Class Current: 604/500
• CPC Class Codes: A61M 2005/1402 Priming
• CPC Class Codes: A61M 2005/1403 Flushing or purging
• CPC Class Codes: A61M 2005/1405 Patient controlled analgesia [PCA]
• CPC Class Codes: A61M 2039/0009 Assemblies therefor designed for particular applications, e.g. contrast or saline injection, suction or irrigation
• CPC Class Codes: A61M 2205/273 preventing reuse, e.g. of disposables
• CPC Class Codes: A61M 39/284 Lever clamps
• CPC Class Codes: A61M 5/141 with capillaries for restricting fluid flow
• CPC Class Codes: A61M 5/16809 by repeated filling and emptying of an intermediate volume pressure infusion using positive displacement pumps A61M5/142
• CPC Class Codes: A61M 5/16877 Adjusting flow; Devices for setting a flow rate

Abstract

A medical fluid control device includes an actuator that is selectively operable to cause fluid to be delivered from a fluid source to a patient at a basal rate of flow via a first flow path, or cause a bolus dose of fluid to be delivered from a bolus reservoir to the patient via a second flow path.

Claims

1. A device for controlling the delivery of a fluid from a fluid source to a patient, the device comprising:

a first flow path between the fluid source and the patient, the first flow path for delivering fluid from the fluid source to the patient at a basal rate of flow;

a second flow path between the fluid source and the patient, the second flow path including;

a bolus reservoir;

a bolus valve disposed between the bolus reservoir and the patient;

a first branch in which the fluid source is in fluid communication with the bolus reservoir and the bolus valve; and

a second branch in which the fluid source is in fluid communication with a branch valve, the bolus reservoir and the bolus valve; and

an actuator that is selectively operable to place the device in one of at least the following modes;

a priming mode in which the bolus valve and the branch valve are open and fluid flows through the first flow path, the first branch of the second flow path, and the second branch of the second flow path;

a fill mode in which the bolus valve is closed and the branch valve is open and fluid flows from the fluid source to the bolus reservoir via the second branch of the second flow path; and

a standby mode in which the bolus valve and the branch valve are closed and fluid flows between the fluid source and the patient via the first flow path.

2. The device of claim 1, wherein, in the standby mode, the actuator is selectively further operable to open the branch valve and apply pressure to the bolus reservoir to cause fluid stored in the bolus reservoir to flow to the patient.

3. The device of claim 2, wherein, in the standby mode, the actuator is selectively further operable to be depressed responsive to user action.

4. The device of claim 1, wherein the first flow path includes a basal restrictor tube.

5. The device of claim 4, wherein the basal restrictor tube is dimensioned to allow fluid flow through the first flow path at the basal rate of flow.

6. The device of claim 1, wherein the device is configured to allow filling of the bolus reservoir while fluid is being delivered to the patient via the first flow path.

7. The device of claim 1, wherein the first branch includes a branch restrictor tube dimensioned to allow fluid flow at a bolus filling rate.

8. The device of claim 7, wherein the bolus filling rate is preselected based on a desired amount of time needed to fill the bolus reservoir with fluid from the fluid source via the first branch of the second flow path.

9. The device of claim 7, wherein, in the standby mode, fluid flows between the fluid source and the bolus reservoir via the first branch of the second flow path until the bolus reservoir is filled.

10. The device of claim 1, wherein the actuator is selectively rotatable to place the device in one of at least the following modes:

the priming mode, the fill mode, and the standby mode.

11. The device of claim 1, wherein the bolus valve and the branch valve are pinch tubes.

12. The device of claim 1, wherein the actuator is a knob operable by the patient.

13. The device of claim 1, wherein the fluid source is an infusion pump.

14. A method for controlling the delivery of fluid from a fluid source to a patient using a device having a first flow path and a second flow path parallel to the first flow path, the method comprising:

providing fluid to the patient via the first flow path at a basal rate of flow;

in response to actuation by an actuator, allowing delivery to the patient of fluid stored in a bolus reservoir disposed along the second flow path.

15. The method of claim 14, wherein allowing delivery of fluid stored in the bolus reservoir includes opening a bolus valve disposed along the second flow path between the bolus reservoir and the patient.

16. The method of claim 14, further comprising filling the bolus reservoir with fluid from the fluid source while fluid is being provided to the patient via the first flow path.

17. The method of claim 16, wherein filling the bolus reservoir includes providing fluid flow from the fluid source to the bolus reservoir via a first branch of the second flow path.

18. The method of claim 16, wherein filling the bolus reservoir includes providing fluid flow from the fluid source to the bolus reservoir via a second branch of the second flow path.

19. The method of claim 18, wherein providing fluid flow via the second branch of the second flow path includes opening a branch valve disposed along the second branch.