Method for manipulating dosage control apparatus

• US 20040055648A1
• Filed: 12/30/2002
• Published: 03/25/2004
• Est. Priority Date: 09/20/2002
• Status: Active Grant

• Current Assignee: Advanced Neuromodulation Systems Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: Advanced Neuromodulation Systems Incorporated (Abbott Laboratories Incorporated)
• Inventors: Erickson, John
• Granted Patent: US 6,966,325 B2
• Time in Patent Office: Days
• US Class Current: 137/554
• CPC Class Codes: A61M 2005/14208 with a programmable infusion control system, characterised by the infusion program
• CPC Class Codes: A61M 2205/3507 with implanted devices, e.g. external control
• CPC Class Codes: A61M 39/22 Valves or arrangement of valves A61M39/02, A61M39/0247, A61M39/16 take precedence; regulating valves in infusion systems A61M5/16881; in devices worn by the patient for the reception of urine, faeces, catamenial or other discharge, or in colostomy devices A61F5/4405
• CPC Class Codes: A61M 5/14216 Reciprocating piston type
• CPC Class Codes: A61M 5/14276 specially adapted for implantation
• CPC Class Codes: A61M 5/16881 Regulating valves on-off valves, e.g. clamps A61M39/28
• CPC Class Codes: F04B 49/225 with throttling valves or valves varying the pump inlet opening or the outlet opening
• CPC Class Codes: Y10T 137/0318 Processes
• CPC Class Codes: Y10T 137/8242 Electrical
• CPC Class Codes: Y10T 137/86389 Programmer or timer
• CPC Class Codes: Y10T 137/88062 Coaxial oppositely directed seats

Abstract

The invention is directed to a method and circuitry for controlling dosage rates of a treatment solution. An electric pulse is directed through a coil, inducing a magnetic field and causing a valve to open. A subsequent set of pulses is directed through the coil to maintain the position of the valve. Between pulses, the coil motivates current to flow. Energy associated with the current is captured in a collection circuitry. The method and circuitry may also interpret a signal induced in the coil by an externally applied magnetic field such as that produced by an MIR. The method and circuitry may provide an electric signal to counteract the externally applied magnetic field or to produce a degaussing field.

Claims

1. A method for controlling the flow rate of a treatment solution, the method comprising:

producing an initial electric pulse;

inducing a magnetic field with a coil using the initial electric pulse;

motivating two armatures, using the magnetic field, to move from a closed position against the force of at least one spring whereby a path for fluid flow is provided; and

providing a subsequent set of electric pulses, the subsequent set of electric pulses maintaining the magnetic field above a threshold below which the armatures return to the closed position.

2. The method of claim 1, wherein the step of producing the initial electric pulse is performed by activating two switches electrically coupled to opposite sides of the coil.

3. The method of claim 1, wherein the step of producing the subsequent set of electric pulses is performed by activating two switches electrically coupled to opposite sides of the coil.

4. The method of claim 1, further comprising:

collecting energy from current produced by inductance in the coil during periods between pulses of the subsequent set of pulses.

5. The method of claim 4, wherein the step of collecting energy is performed with a capacitor.

6. The method of claim 5, wherein the capacitor is electrically aligned with the flow of current produced by inductance in the coil through the activation of at least one switch.

7. The method of claim 1, wherein the method is performed by an implanted device located within a patient.

8. The method of claim 1, further comprising:

determining a schedule for flow of a treatment solution in accordance with a prescribed dosage.

9. The method of claim 8, wherein the steps of producing the initial electric pulse and producing the subsequent set of electric pulses are performed in accordance with the schedule to produce a time averaged flow rate of the treatment solution such that the prescribed dosage is achieved.

10. A method for controlling the flow rate of a treatment solution, the method comprising:

determining a flow rate of a treatment solution in compliance with a prescribed dosage;

producing an initial electric pulse;

inducing a magnetic field with a coil with the initial electric pulse;

motivating two armatures to move from a closed position against the force of at least one spring whereby a path for fluid flow is provided;

providing a subsequent set of electric pulses, the subsequent set of electric pulses maintaining the magnetic field above a threshold below which the armatures return to the closed position; and

collecting energy from current produced by inductance in the coil during periods between pulses of the subsequent set of pulses.

11. The method of claim 10, wherein the step of producing the initial electric pulse is performed by activating two switches electrically coupled to opposite sides of the coil.

12. The method of claim 10, wherein the step of producing the subsequent set of electric pulses is performed by activating two switches electrically coupled to opposite sides of the coil.

13. The method of claim 10, wherein the step of collecting energy is performed with a capacitor.

14. The method of claim 13, wherein the capacitor is electrically aligned with the flow of current produced by inductance in the coil through the activation of at least one switch.

15. The method of claim 10, wherein the method is performed by an implanted device located within a patient.

16. The method of claim 10, wherein the steps of producing an initial electric pulse and producing a subsequent set of electric pulses are performed in accordance with the schedule to produce a time averaged flow rate of the treatment solution such that the prescribed dosage is achieved.

17. A circuitry for controlling the flow of at least one treatment solution, the circuitry comprising:

a power source;

a first switch coupled to the positive node of the power source;

a second switch coupled to the negative node of the power source; and

a coil associated with a valve associated with an implantable dosage control system, a first connection of the coil electrically coupled to the first switch and a second connection of the coil electrically coupled to the second switch, the coil inducing a magnetic field that opens the valve when the first and second switch are activated.

18. The circuitry of claim 17, further comprising:

a third switch electrically coupled to the first connection of the coil and the negative node of the power source;

a diode electrically coupled to the second connection of the coil and the positive node of the power source; and

a collection circuitry electrically coupled to the power source, the collection circuitry collecting energy when the first and second switches are open and the third switch is closed.

19. The circuitry of claim 18, further comprising:

a control circuitry electrically coupled to the third switch, the control circuitry operably closing the third switch in accordance with the valleys of a set of electric pulses directed through the coil whereby current induced by inductance in the coil is collected by the collection circuitry.

20. The circuitry of claim 17, further comprising:

a control circuitry electrically coupled to the first and second switches, the control circuitry closing the first and second switches to produce an initial electric pulse in the coil, the coil inducing a magnetic field that operably opens the valve when the first and second switch are activated; and

the control circuitry operating the first and second switches to produce a subsequent set of electric pulses in the coil, the coil alternately discharging and inducing the magnetic field such that the magnitude of the magnetic field is maintained above a threshold below which the valve would close.