Constant current stimulator and current stimulator system

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...

AI Technical Summary

Problems solved by technology

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

Images