Process for the adjustment of a switchable flow limiting apparatus, and an apparatus operating according to the process

• US 5,667,504 A
• Filed: 10/11/1994
• Issued: 09/16/1997
• Est. Priority Date: 10/08/1993
• Status: Expired due to Term

• Current Assignee: Codman Neuro Sciences Sarl
• Original Assignee: Carl-Zeiss-Stiftung
• Inventors: Baumann, Hans, Otto, Karl-Heinz, Peters, Jorg-Roger, Graczyk, Wolfgang, Hinrichs, Kai-Jurgen
• Primary Examiner(s): Bockelman, Mark
• Application Number:
  US08/321,638
• Time in Patent Office: 1,071 Days
• Field of Search: 604/65, 604/66, 604/67, 604/131, 604/152, 604/891.1, 604/249, 128/903, 607/32
• US Class Current: 604/891.1
• CPC Class Codes: A61M 2205/3523 using telemetric means
• CPC Class Codes: A61M 5/14276 specially adapted for implantation
• CPC Class Codes: A61M 5/16877 Adjusting flow; Devices for setting a flow rate
• CPC Class Codes: Y10S 128/903 Radio telemetry

Abstract

A process and an apparatus for adjustment of a switchable, flow-limiting device for limited flow of liquids or gases employs a remote service device. The flow-limiting device and the service device are spatially separated and there is no bodily connection between the two. Energy necessary for adjustment of the flow-limiting device is transmitted from the service device into an infusion pump that contains the flow-limiting device. The flow-limiting device is a valve having three stable operating positional states. The valve can only be switched while energy is being transmitted from the service device.

Claims

1. Process for adjustment of a switchable, flow-limiting device inside a patient'"'"'s body having at least three stable operating states for limited flow of liquids or gases by means of a service device outside said patient'"'"'s body, said flow-limiting device and said service device being spatially separated with no bodily connection between said service device and said flow-limiting device comprising:

establishing different flow rates for said liquids or gases by means of different throttle paths arranged to follow said flow-limiting device in a device that includes said flow-limiting device, and,

transmitting energy needed for adjustment of said flow-limiting device from said service device into said device that includes said flow-limiting device,

thereby switching said flow-limiting device among said at least three stable operating states to switch said flow of said liquids or gases from one throttle path arrangement to another only during a duration of said energy transmission.

2. Process for the adjustment of a switchable flow-limiting device according to claim 1, wherein said device that includes said flow-limiting device is an infusion pump for implantation into a patient'"'"'s body for treatment of the patient with medicament, said infusion pump having at least one puncture point for filling a supply container to store a selected medicament, further comprising:

transporting said selected medicament from said supply container to said flow-limiting device by means of a liquid transporting arrangement, and

introducing said selected medicament from said supply container into said patient'"'"'s body by means of said throttle paths.

3. Process for the adjustment of a switchable, flow-limiting device according to claim 2, further comprising measuring filling-level values of said supply container with a sensor and storing said filling-level values intermediately in a memory in said infusion pump.

4. Process for the adjustment of a switchable, flow-limiting device according to claim 1, wherein said switchable flow-limiting device comprises a valve having at least three stable positional operating states.

5. Process for the adjustment of a switchable, flow-limiting device according to claim 1, wherein said energy transmitting step comprises transmitting energy only intermittently.

6. Process for the adjustment of a switchable, flow-limiting device according to claim 1, wherein said switching step comprises moving a piston within said flow-limiting device between two stable end positions in an interior of said flow-limiting device and a third stable position achieved by combination of magnetic holding force and restoring spring force.

7. Process for the adjustment of a switchable, flow-limiting device according to claim 6, further comprising retaining said switchable, flow-limiting device in said stable positions without drawing electric current.

8. Process for the adjustment of a switchable, flow-limiting device according to claim 1, wherein said energy transmitting step comprises transmitting said energy inductively.

9. Process for the adjustment of a switchable, flow-limiting device according to claim 1, further comprising transmitting intermediately stored data from an interior of an infusion pump that includes said flow-limiting device to said service device by means of a data transmission device having portions located in said infusion pump and in said service device.

10. Process for the adjustment of a switchable, flow-limiting device according to claim 1, wherein said energy transmitting step comprises transmitting energy inductively by means of absorption telemetry.

11. Apparatus for adjustment of the flow of liquids or gases inside a patient'"'"'s body, comprising:

a device inside said patient'"'"'s body including a flow-limiting device,

and a service device outside said patient'"'"'s body that enables switching of said flow-limiting device,

wherein said flow-limiting device is a switchable flow-limiting device having at least three stable operating states,

said flow-limiting device and said service device being spatially separated with no bodily connection between said flow-limiting device and said service device,

a plurality of throttle paths arranged to follow said flow-limiting device in said device that includes said flow-limiting device, and

a device for transmitting energy needed for adjustment of said flow-limiting device from said service device to switch said flow of said liquids or gases from one throttle path arrangement to another only during the duration of energy transmission from said service device,

said flow-limiting device comprising a piston in a chamber within said flow-limiting device and an integrated leaf spring structure for mounting and guiding said piston,

said piston being stable in three positional operating states, and

said chamber having at least one lateral intake and at least two end faces with a central opposed outlet on each of said at least two end faces.

12. Apparatus according to claim 11, wherein said piston comprises a permanent magnet further comprising a separately acuatable electromagnet having a coil former on each side of said at least two end faces.