Automatic safety occluder

• US 7,998,121 B2
• Filed: 02/05/2010
• Issued: 08/16/2011
• Est. Priority Date: 02/06/2009
• Status: Active Grant

• Current Assignee: Zevex (Moog Incorporated)
• Original Assignee: Zevex (Moog Incorporated)
• Inventors: Stringham, Mark
• Primary Examiner(s): Lucchesi; Nicholas D
• Assistant Examiner(s): VU, QUYNH-NHU HOANG
• Application Number:
  US12/701,467
• Publication Number:
  US 20100204651A1
• Time in Patent Office: 557 Days
• Field of Search: 604/118, 604/250, 604/246, 604/249, 604/151, 251 4- 5, 251/7, 251/90, 251/321, 251/337
• US Class Current: 604/250
• CPC Class Codes: A61M 39/28 Clamping means for squeezing flexible tubes, e.g. roller clamps tube strippers A61M1/83
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/16881 Regulating valves on-off valves, e.g. clamps A61M39/28

Abstract

An automatic safety occluder provides an occluder for an infusion set that is biased in a closed position until an electrical signal is received that causes the occluder to open. Should the occluder fail to be installed correctly, or if power is removed, the occluder will return to its biased closed position, preventing free flow. The occluder may also be placed in an integrated unit such that the automatic safety occluder may attach to the tubing as a unit.

Claims

1. A system for selectively controlling flow through an infusion tube comprising:

a pump having a body and a pumping mechanism;

a recess formed in the pump body for receiving an occluder of an infusion set;

an electric solenoid disposed in communication with the recess;

an infusion set having a tube for delivering a fluid and an occluder disposed thereon; and

wherein the infusion set is mounted in the pump such that the tube engages the pumping mechanism and such that the occluder is positioned in the recess such that actuation of the solenoid actuates the occluder to selectively allow flow through the tube; and

wherein the solenoid is formed as part of an infusion pump, and wherein the occluder is disposable in the infusion pump adjacent the solenoid such that actuation of the solenoid actuates the occluder.

2. The system of claim 1, wherein the occluder comprises:

a body;

a plunger;

a passage through the body;

a passage through the plunger;

wherein the tube passes through the body passage and the plunger passage; and

wherein the plunger moves between a first position wherein the body passage and the plunger passage are in alignment so as to allow flow through the tube and a second position wherein the tube is pinched closed by the body passage and the plunger passage.

3. The system of claim 2, wherein the solenoid presses on the occluder to selectively move the plunger into the first position.

4. The system of claim 2, wherein the occluder is biased into the second position.

5. The system of claim 2, wherein the occluder body has a void for receiving the plunger and wherein the plunger is movable within the void between the first position and a second position.

6. The system of claim 2, wherein the occluder further comprises a biasing element disposed between the body and the plunger for biasing the plunger into the second position.

7. The system of claim 1, further comprising a registration member for aligning the occluder within the pump.

8. The system of claim 7, wherein the registration member aligns the occluder with the solenoid.

9. The system of claim 8, wherein the registration member is part of the occluder.

10. The system of claim 1, wherein the tube engages the pumping mechanism of a pump to move fluid through the tube.

11. The system of claim 1, wherein the solenoid has a biasing member such that, when an electrical current is not applied to the solenoid, the solenoid is biased into a non-actuated position permitting the plunger to move into the second position to prevent flow through the tube.

12. The system of claim 1, wherein the solenoid is a push-pull solenoid.

13. A system for selectively controlling flow through an infusion tube comprising:

a pump having a body and a pumping mechanism;

a recess formed in the pump body for receiving an occluder of an infusion set;

an electric solenoid disposed in communication with the recess;

an infusion set having a tube for delivering a fluid and an occluder disposed thereon; and

wherein the infusion set is mounted in the pump such that the tube engages the pumping mechanism and such that the occluder is positioned in the recess such that actuation of the solenoid actuates the occluder to selectively allow flow through the tube;

wherein the occluder comprises;

a body;

a plunger;

a passage through the body;

a passage through the plunger;

wherein the tube passes through the body passage and the plunger passage; and

wherein the plunger moves between a first position wherein the body passage and the plunger passage are in alignment so as to allow flow through the tube and a second position wherein the tube is pinched closed by the body passage and the plunger passage; and

wherein the solenoid is attached to the plunger and not to the body of the occluder such that actuation of the solenoid will not actuate the occluder if the occluder and solenoid are not constrained to a fixed position.

14. The system of claim 13, wherein a structure defining the recess engages the occluder and the solenoid such that the solenoid actuates the occluder when an electrical signal is applied thereto.

15. The system of claim 13, wherein the solenoid and the occluder are removable from the pump.

16. A system for selectively controlling flow through a tube for delivering fluid to a patient, the system comprising:

a pump having a body, a pumping mechanism and a recess for receiving a tube;

an electric solenoid disposed in communication with the pump body;

a fluid delivery set mounted in the pump, the fluid delivery set having a fluid delivery tube which engages the pumping mechanism and an occluder disposed along the tube for selectively preventing flow through the tube; and

wherein the solenoid is disposed in communication with the occluder such that actuation of the solenoid actuates the occluder to selectively allow flow through the tube;

wherein the occluder comprises a body and a plunger movable within the body, and wherein the tubing extends through the plunger and the body such that the plunger allows fluid to flow through the tubing in the first position and pinches the tubing closed to prevent fluid flow through the tubing when in the second position; and

wherein the solenoid is disposed in communication with the plunger and not to the body of the occluder such that actuation of the solenoid will not actuate the occluder if the occluder and solenoid are not constrained to a fixed position.

17. The system of claim 16, wherein the solenoid presses on the occluder to selectively move the plunger into the first position.