Constant current stimulation circuit, electric stimulator and signal output method of electric stimulator

Abstract

The invention discloses a constant current stimulation circuit, an electric stimulator and a signal output method of the electric stimulator. The constant current stimulation circuit comprises a control module, a switch key, a waveform generation module and a constant current module; the control module is used for adjusting an output waveform trigger signal, an amplitude modulation signal and a frequency modulation signal according to the pressing state of the switch key; the waveform generation module is used for adjusting an output adjustable signal according to the received waveform triggersignal, adjusting the amplitude of the adjustable signal according to the received amplitude modulation signal and adjusting the frequency of the adjustable signal according to the received frequencymodulation signal; and the constant current module is used for processing the received adjustable signal into a constant-current vagus nerve stimulation signal and outputting the constant-current vagus nerve stimulation signal by stimulation probe. According to the technical scheme provided by the invention, the electric signal which is finally output through the stimulation probe and is used forelectrically stimulating the vagus nerve is a constant-current signal, so that the swallowing problem of a patient due to nuclear damage of the vagus nerve caused by low brainstem infarction is improved to the greatest extent.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of medical devices, in particular to a constant current stimulation circuit, an electrical stimulator and a signal output method thereof. Background technique [0002] The incidence of dysphagia caused by low brainstem infarction (such as dorsolateral medulla lesion) is as high as 50%. Low brainstem infarction can be caused by dorsolateral medulla lesion, for example. The damage mechanism of this type of dysphagia is mainly due to bulbar lesion leading to nuclear damage of vagus nerve , affecting the function of the vagus nerve, resulting in weak motility of the pharyngeal constrictor muscles, which may lead to aspiration pneumonia, dehydration or malnutrition in patients, affecting the quality of life of patients, and even life-threatening in severe cases. [0003] In recent years, although the application of peripheral nerve electrical stimulation technology has achieved certain c...

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Problems solved by technology

[0002] The incidence of dysphagia caused by low brainstem infarction (such as dorsolateral medullary lesion) is as high as 50%. Low brainstem infarction can be caused by dorsolateral medullary lesion, for example. The damage mechanism of this type of swallowing disorder is mainly that the lesion of the medulla leads to nuclear damage of the vagus nerve. , affecting the function of the vagus nerve, resulting in weak motility of the pharyngeal constrictor muscles, which may lead to aspiration pneumonia, dehydration or malnutrition in patients, affecting the quality of life of patients, and even life-threatening in severe cases

[0003] In recent years, although the application of peripheral nerve electrical stimulation technology has achieved certain curative effect in the treatment of this type of dysphagia, for the severe dysphagia caused by low brainstem infarction that is clinically difficult to solve, the prominent manifestation in the later stage of the disease is tongue The bone-larynx compound structure has been elevated, but the weakness of pharyngeal peristalsis is obvious, and the residual phenomenon of the epiglottic valley and pyriform sinus is prominent, and the existing electrical stimulation of peripheral nerves cannot effectively solve the problem.

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