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Implantable non-invasive rate-adjustable pump
| Details |
Inventors: Torgerson, Nathan A.; McMullen, Raymond F.;
Assignee: Medtronic, Inc. (Minneapolis, MN)
Primary Examiner: Mendez; Manuel
Assistant Examiner:
Attorney, Agent or Firm: Arnold, White & Durkee
In accordance with the present invention, an implantable pump is programmed non-invasively by means of a programmer that communicates flow rate information by means of radio frequency telemetry or other methods of non-invasive telemetry. The programmer also supplies power to the implantable pump during programming. The implanted rate-adjustable pump that receives rate information and power by telemetry preferably does not include a battery or any other type of internal power supply, relying only on the energy obtained from the programmer through telemetry. |
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DETAILED DESCRIPTION As explained in more detail below, the implantable non-invasive rate adjustable pump of the present invention overcomes the above-noted and other shortcomings of prior implantable pumps.
In accordance with the present invention, an implantable pump is programmed non-invasively by means of a programmer that communicates flow rate information by means of radio frequency telemetry or other methods of non-invasive telemetry.
The programmer also supplies power to the implantable pump during programming.
The implanted rate-adjustable pump that receives rate information and power by telemetry preferably does not include a battery or any other type of internal power supply, relying only on the energy obtained from the programmer through telemetry.
The implanted telemetry rate-adjustable pump is "powered up" during programming.
To power up the device, the telemetry head of a programmer is placed over the patient's skin in the area in which the pump had been implanted.
A telemetry signal then is received by an antenna in the pump, and associated circuitry in the pump is powered up.
In other words, the programmer telemetry head sends a signal through the patient's skin in the area in which the pump is implanted.
A generally flat coil of wire or other suitable receiving station inside the implanted unit proximate the patient's skin receives the signal, and a voltage is formed in the coil.
This voltage, which in general remains as long as the programmer head and signal are in place, serves as a power source for the pump, thus eliminating the need for an internal battery.
Powering up a device using telemetry signals is not uncommon in certain medical applications unrelated to drug infusion pumps, e.
g.
, implantable pulse generators and the like.
With those devices, as with drug infusion pumps, there is a desire to make the devices as small as possible for patient comfort.
Thus, with certain model stimulators, like the Xtrel.
TM.
and Mattrix.
TM.
implantable stimulators, commercially available from Medtronic, Inc
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Heart Surgery 
