Cardiac pacemaker device

• US 20070282383A1
• Filed: 05/17/2007
• Published: 12/06/2007
• Est. Priority Date: 06/02/2006
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Koyama, Jun
• Granted Patent: US 8,838,244 B2
• Time in Patent Office: Days
• US Class Current: 607/33
• CPC Class Codes: A61N 1/37512 Pacemakers
• CPC Class Codes: A61N 1/3787 from an external energy source

Abstract

It is necessary to periodically replace a cell of an implantable-type cardiac pacemaker device, which causes suffering to a patient as often as a cell is replaced. Thus, it is an object of the present invention to dispense with cell replacement of the cardiac pacemaker device. A cardiac pacemaker device of the present invention has an antenna and a battery built-in, and an electric power is transmitted to the built-in antenna from outside a body by an electromagnetic wave to store the electric power in the battery. With the use of the electric power stored in the battery, a main body of the pacemaker device can operate. If necessary, the electric power can be supplied wirelessly from outside and a surgery for exchanging a cell becomes unnecessary; therefore, a patient'"'"'s suffering can be relieved.

Claims

1. A cardiac pacemaker device comprising:

a first circuit for supplying an electric signal to a heart;

a second circuit for detecting a residual amount of a battery; and

an antenna for charging the battery,

wherein the battery is connected to the first and second circuits.

2. A cardiac pacemaker device according to claim 1,

wherein the second circuit comprises an A/D conversion circuit, a clock generation circuit, and a logic circuit which are connected to each other.

3. A cardiac pacemaker device according to claim 1, wherein each circuit of the cardiac pacemaker device comprises a transistor, the transistor including a semiconductor layer formed on an insulating surface.

4. A cardiac pacemaker device according to claim 1, wherein a chassis of the cardiac pacemaker device is formed of a resin material.

5. A cardiac pacemaker device according to claim 4, wherein the chassis is coated with a diamond-like-carbon film.

6. A cardiac pacemaker device comprising:

a first circuit for supplying an electric signal to a heart;

a second circuit for detecting a residual amount of a battery;

a third circuit for controlling the residual amount of the battery; and

an antenna for charging the battery,

wherein the battery is connected to the first, second, and third circuits.

7. A cardiac pacemaker device according to claim 6,

wherein the second circuit comprises an A/D conversion circuit, a clock generation circuit, and a logic circuit which are connected to each other.

8. A cardiac pacemaker device according to claim 6, wherein each circuit of the cardiac pacemaker device comprises a transistor, the transistor including a semiconductor layer formed on an insulating surface.

9. A cardiac pacemaker device according to claim 6, wherein a chassis of the cardiac pacemaker device is formed of a resin material.

10. A cardiac pacemaker device according to claim 9, wherein the chassis is coated with a diamond-like-carbon film.

11. A cardiac pacemaker device comprising:

an atrium detection amplifier circuit for detecting and amplifying an electrocardiogram of an atrium;

a chamber detection amplifier circuit for detecting and amplifying an electrocardiogram of a chamber;

a controller circuit for outputting an abnormal signal when an arhythmia is detected into which amplification signals of the atrium detection amplifier circuit and the chamber detection amplifier circuit is inputted to measure the electrocardiograms and calculate a pulse cycle, as well;

a pulse generation circuit for outputting an electric pulse which stimulates a heart when the abnormal signal is inputted into the controller circuit;

a battery for supplying an electric power to the atrium detection amplifier circuit, the chamber detection amplifier circuit, the controller circuit, and the pulse generation circuit;

an internal antenna for receiving a wireless signal transmitted from an external device;

a rectifying and smoothing circuit converting the wireless signal received by the internal antenna into direct current;

a charge circuit for generating current based on an electric power of the rectifying and smoothing circuit and charging the battery; and

a charge control circuit for monitoring the battery so as not to be charged too much, and for controlling the charge circuit and suppressing the charge amount when the charge amount is overcharged.

12. A cardiac pacemaker device according to claim 11, further comprising:

a residual amount detection circuit for monitoring a voltage of the battery and converting the voltage into a digital signal; and

a modulation circuit for modulating the wireless signal when the digital signal is inputted are included,

wherein the residual amount detection circuit transmits a residual amount signal.

13. A cardiac pacemaker device according to claim 11, wherein each circuit of the cardiac pacemaker device comprises a transistor, the transistor including a semiconductor layer formed on an insulating surface.

14. A cardiac pacemaker device according to claim 11, wherein a chassis of the cardiac pacemaker device is formed of a resin material.

15. A cardiac pacemaker device according to claim 14, wherein the chassis is coated with a diamond-like-carbon film.