High-frequency electrotome generator based on FPGA (Field Programmable Gata Array)

Abstract

The invention relates to a high-frequency electrotome generator based on an FPGA (Field Programmable Gata Array). A power supply provides direct-current voltage signals to a radio frequency generation module; the direct-current voltage signals are subjected to resonant amplification of the radio frequency generation module and rectification of a half bridge circuit to be changed to high-voltage alternating-current radio frequency singles to be output, and then the output signals are transmitted to a biological organization by a radiation electrode and a backward channel; an impedance detection unit is used for detecting the impedance of the biological organization and transmitting impedance parameters to an FPGA main control unit; according to the impedance parameters, the FPGA main control unit regulates the duty ratio of SPWM (Sinusoidal Pulse Width Modulation) waves in real time; and then the SPWM waves are output to the radio frequency generation module. A controller disclosed by the invention can realize accurate control and is high in response speed, easy to modify, capable of programming in situ, strong in universality and stable in performance; and more importantly, by virtue of the large-scale FPGA, a microprocessor, a special hardware algorithm unit, a special waveform generation unit and a signal acquisition and processing unit are all integrated on a single chip, so that the high-frequency electrotome generator becomes a special integral electronic control system.

Description

technical field [0001] The invention relates to a surgical instrument, in particular to an FPGA-based high-frequency electric knife generator. Background technique [0002] High-frequency electric knife is widely used, not only in direct vision surgery, such as general surgery, thoracic surgery, brain surgery, ENT surgery, maxillofacial surgery, but also in various endoscopic surgery , Such as: laparoscopy, prostatectomy, gastroscopy, cystoscopy, hysteroscopy and other operations. The high-frequency electrosurgical generator is its core component. At present, traditional high-frequency electrosurgical units widely use single-chip microcomputers to control the whole machine to implement automatic adjustment of power waveforms, voltages, and currents under various functions, as well as detection of various safety indicators. However, compared with digital control, there are also some disadvantages: there are many control circuit components and complex models; analog devices ...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems that there are many high-frequency electrosurgical control circuit components, complex models, easy aging of analog devices, and single control method, and proposes a FPGA-based high-frequency electrosurgical generator, which utilizes FPGA programmability and uses SPWM The modulation method controls the frequency, amplitude and power of the RF output signal through a resonant half-bridge inverter circuit, making it suitable for the cutting and / or coagulation required by biological tissue

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