Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Reexamination Certificate
2000-06-26
2004-10-12
Evanisko, George R. (Department: 3762)
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
C607S060000
Reexamination Certificate
active
06804559
ABSTRACT:
FIELD OF THE INVENTION
The invention concerns an electromedical implant comprising a telemetry device for the exchange of data with an external apparatus and more particularly to a cardiac pacemaker comprising such a telemetry device.
BACKGROUND OF INVENTION
In conventional electromedical implants with a telemetry device for the exchange of data with an external apparatus, such as, for example, cardiac pacemakers, defibrillators, cardioverters or other electronically actuated or controlled implants, the energy for transmission and reception for the telemetry device, including a transmitting device and a receiving device, is usually taken from a previously charged buffer capacitor.
In such a system, if transmission and reception follow in direct succession, the buffer capacitor has to be charged up to a high voltage to have sufficient voltage ready for the second procedure after the voltage drop resulting from the first procedure. Accordingly, the components involved (charge pump, capacitors, voltage regulator) must be designed for a voltage strength which would otherwise not be required in the implant. Such high voltage components increase the implant production costs. In addition, energy is lost because of the poor efficiency of voltage multiplication, which is a problem given the severely limited energy supply in an implant of that kind.
Accordingly, the need exists for an telemetry capable electromedical implant having lower production costs and which has lower energy requirements.
SUMMARY OF THE INVENTION
The invention is directed to an electromedical implant comprising a telemetry device for the exchange of data with an external apparatus where the telemetry device comprises a transmitting device and a receiving device, characterized in that separate energy storage devices are provided for the transmitting and receiving devices.
In such an apparatus, lower production costs and lower energy requirements are obtained if separate energy storage means are provided for the transmitting device and the receiving device, because the separate energy storage means only have to be charged to the voltage necessary for the single procedure involved. Furthermore, less energy is lost through voltage multiplication. Finally, the energy consumption involved in transmission does not influence the energy supply for reception and vice versa so that the procedures can occur in immediate succession, which is desirable for a bidirectional communication protocol. In this respect, an electromedical implant according to the invention is a particularly advantageous in the area of long-range high-frequency telemetry.
In one alternative embodiment, the individual energy storage means are formed by a buffer capacitor. In such an embodiment, the buffer capacitors may be of different sizes and the size of the buffer capacitors are matched to the procedure which is to be supplied thereby, e.g., if a transmission procedure should requires more power than a reception procedure.
In another alternative embodiment, the buffer storage means may be designed such that they can both be charged at the same time depending on the requirements involved in unidirectional or bidirectional operation of the telemetry. In this respect, the buffer storage means are preferably charged immediately prior to a transmission procedure or a reception procedure in order to avoid the energy losses due to loss currents that can occur during relatively long periods of maintaining the charged state.
In still another alternative embodiment, one energy storage means is utilized as a safety reserve for the other energy storage means to improve transmission reliability. In such an embodiment, it is possible for the energy supply to be better utilized because, there would be no need to keep an additional safety reserve capacitor available for use after draining the first energy storage means.
In yet another alternative embodiment, it is possible to implement changes in the utilization of energy from a particular energy storage means using the circuit according to the invention. For example, in one exemplary embodiment, after draining the transmission energy storage means, the circuit could instruct the reception energy storage means to provide power for a renewed safety data transmission operation.
REFERENCES:
patent: 4166470 (1979-09-01), Neumann
patent: 4172459 (1979-10-01), Hepp
patent: 4531527 (1985-07-01), Reinhold, Jr. et al.
patent: 4741341 (1988-05-01), Marach
patent: 5127404 (1992-07-01), Wyborny et al.
patent: 5139028 (1992-08-01), Steinhaus et al.
patent: 5197480 (1993-03-01), Gebhardt
patent: 5246008 (1993-09-01), Mueller
patent: 5292343 (1994-03-01), Blanchette et al.
patent: 5313953 (1994-05-01), Yomtov et al.
patent: 5348008 (1994-09-01), Bornn et al.
patent: 5411031 (1995-05-01), Yomtov
patent: 5411536 (1995-05-01), Armstrong
patent: 5413594 (1995-05-01), Williams
patent: 5522396 (1996-06-01), Langer et al.
patent: 5531774 (1996-07-01), Schulman et al.
patent: 5562713 (1996-10-01), Silvian
patent: 5626630 (1997-05-01), Markowitz et al.
patent: 5702431 (1997-12-01), Wang et al.
patent: 5720770 (1998-02-01), Nappholz et al.
patent: 5729203 (1998-03-01), Oka et al.
patent: 5735887 (1998-04-01), Barreras et al.
patent: 5752976 (1998-05-01), Duffin et al.
patent: 5814089 (1998-09-01), Stokes et al.
patent: 5999857 (1999-12-01), Weijand et al.
patent: 31 39 452 (1982-09-01), None
patent: 39 36 547 (1991-05-01), None
patent: 43 41 903 (1995-06-01), None
patent: 689 22 362 (1995-08-01), None
patent: 196 22 154 (1997-05-01), None
patent: 0 097 264 (1984-01-01), None
patent: 0 340 293 (1989-11-01), None
patent: 0 344 770 (1989-12-01), None
patent: 0 362 611 (1990-04-01), None
patent: 0 450 341 (1991-10-01), None
patent: 0 537 936 (1993-04-01), None
patent: 0 540 154 (1993-05-01), None
patent: 0 607 638 (1994-07-01), None
patent: 0 856 333 (1998-08-01), None
patent: WO91/16696 (1991-10-01), None
patent: WO 97/00708 (1997-01-01), None
patent: WO 98/08567 (1998-03-01), None
patent: WO 98/42407 (1998-10-01), None
The Vibrator Power Supply, pp. 1-6.*
Corresponding European Patent Office search report, dated Dec. 4, 2003, for Application No. 00250200.3.
Duisters et al., “A -90 dB THD Rail-to-Rail Input Opamp Using a New Local Charge Pump in CMOS”, IEEE J. of Solid-State Circuits, vol. 33, No. 7, Jul. 1998, pp. 947-955.
“Read Only Contactless Identification Device”, UEM: EM Microelectronic-Marin, SA, Paper No. H4102, Marin, Switzerland, 2000, pp. 1-6.
Beetz Klemens
Kraus Michael
Lang Berhard
Lang Martin
Nagelschmidt Axel
Biotronik Mess -und Therapiegeraete GmbH & Co. Ingenieurbuero Be
Evanisko George R.
LandOfFree
Electromedical implant does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electromedical implant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electromedical implant will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3308121