Constant current stimulator and current stimulator system
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A current stimulator, stimulator technology, applied in the direction of sensors, medical science, diagnostic recording/measurement, etc., can solve the problems of single mode, inconvenient adjustment error, lack of resistance to changes in external conditions, and maintaining constant stimulation, etc. Ease of diagnosis and the effect of improving the efficiency and quality of diagnosis
Active Publication Date: 2010-12-08
NCC MEDICAL
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However, from the point of view of practical application, the main drawbacks of existing electrical stimulators on the market are: lack of ability to resist changes in external conditions and maintain constant stimulation; single mode, unable to achieve corresponding electrophysiological diagnosis; pulse parameters ( Pulse width, current intensity, frequency) are inconvenient to adjust and have large errors. For example, the pulse amplitude error given in the vagus nerve stimulator manual can reach up to ±25% or more
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[0041] In order to better understand the present invention, the EMG amplifier of the present invention will be described in detail below by way of examples. Those skilled in the art should understand that this does not constitute a limitation on the invention claimed in this application.
[0042] The structural block diagram of the myoelectric current stimulator according to a specific embodiment of the present invention is as follows figure 1 Shown. The myoelectric current stimulator mainly includes MCU, constant current generation control circuit, pulse control circuit, high voltage generation circuit and 485 bus interface. The 485 bus interface is a circuit module that realizes the communication between the MCU and the host computer. The MCU is connected to the constant current generation control circuit through the DAC (digital / analog conversion output) output therein, thereby determining the magnitude of the stimulation current, and the constant current generation control ci...
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Abstract
The invention discloses a constant current stimulator and a current stimulator system. The constant current stimulator comprises an MCU, a pulse control circuit, a high voltage generation circuit, a constant current generation control circuit and a 485 bus interface circuit, wherein the 485 bus interface circuit realizes communication between the MCU and a host; controlled by the MCU, the pulse control circuit outputs pulse current with adjustable pulse width, frequency and direction as stimulated current; the constant current generation control circuit receives the control signal of the MCU to determine the amount of the stimulated current and ensures constant stimulated current; and the high voltage generation circuit is electrically connected with the pulse control circuit and applies direct current voltage on the pulse control circuit to generate strong enough stimulus intensity.
Description
Technical field [0001] The present invention relates to electrophysiological diagnosis equipment, in particular to a constant current stimulator and a current stimulator system. Background technique [0002] Electromyography and evoked potential meters are used to determine the functional status and suspicious lesions of the peripheral neuromuscular system and central nervous system, detect subclinical lesions, and accurately locate lesions. Confirm the diagnosis of peripheral nerve diseases, myelopathy, demyelinating diseases, cervical spondylosis, diabetes, various nerve injuries, rehabilitation treatment evaluation, sensory and motor function evaluation, etc. Clinically, it is widely used in neurosurgery, hand surgery, orthopedics, pediatrics, rehabilitation, endocrinology, anorectal, otology, ophthalmology, urology, sexual function, forensic identification and other departments. [0003] An electrical stimulation system usually consists of three parts: 1. A pulse generator, wh...
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