A remote detection device for implanted heart pacemaker and bidirectional data transmission method

Abstract

The invention discloses a remote metering device for implanted cardiac pacemaker and the bi-directional data transmission method. The external master control unit of said remote metering device emits frequency-modulated wave to internal impulsator thorugh carrier frequency oscillator with automatic following and adjusting generated frequency and LC series resonance circuit; the LC series resonance circuit of internal impulsator can receive and emit data, when emitting data, it can emit remote metering data of internal master control unit to switch pipe to change the load of LC parallel resonance circuit, regulates radio-frequency carrier load of external controller through jigger coupling and emits remote metering data got by passing receiving circuit of controller to master control unit of program controller. When the external program controller at work, it can provide current of 1 milliammeter for internal impulsator, which can maintain normal work and bi-directional data transmission when ther is not enough powder in internal battery.

Description

Technical field [0001] The invention relates to a telemetry system for an active implantable medical device, in particular to an implantable cardiac pacemaker telemetry device and a two-way data transmission method. Background technique [0002] Active implantable medical devices represented by cardiac pacemakers have been used for decades. Modern implantable cardiac pacemaker therapy systems generally consist of two parts: one part is a microelectronic measurement and control device implanted in the body, including corresponding catheter electrodes and sensors to form a closed-loop control system for the ECG, usually called a pulse generator; The other part is a device placed outside the body that uses radio frequency communication to program the pulse generator in the body and receive telemetry data, usually called an in vitro programmer. [0003] The pulse generator implanted in the body and the power supply battery are sealed in a metal titanium shell, and the working life is...

AI Technical Summary

Problems solved by technology

US Patent (US Patent 4,571,589: Biomedical implant with high speed, low power two-way telemetry) discloses a pacemaker that uses load modulation to achieve passive data transmission, but the technical solution described uses a fixed radio frequency carrier frequency, so it is difficult to Solve the problem of detuning and low coupling coefficient, so the radio frequency modulation signal sent by the programmer to the pacemaker is very weak, and cannot provide the pacemaker with the energy required for telemetry work, and the receiving circuit of the pacemaker needs to amplify the received signal and shaping, which also increases the overhead of pacemaker hardware design

[0005] To sum up, although the passive transmission mode of load modulation has advantages in the wireless transmission of implant device data, and has been successfully applied to some implantable neuromuscular stimulators packaged in non-metallic materials, There are still some problems that need to be solved for implant devices such as pacemakers that are encapsulated in metal shells.

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