Equipment and method for detecting human bodyload impedance of electric stimulation therapy equipment

Abstract

The invention provides equipment and a method for detecting human bodyload impedance of electric stimulation therapy equipment and belongs to the field of medical equipment. The equipment comprises an amplifier A1, wherein an inverted input end of the amplifier A1 is grounded through a sampling resistor Rs, an output end of the amplifier A1 is connected with a base of an NMOS transistor N1, a forward input end of an amplifier A2 is connected with a source of the NMOS transistor N1, an inverted input end of the amplifier A2 is connected with an output end of the amplifier A2, and the output end of the amplifier A2 outputs current detection voltage. Voltage is taken from a current sampling resistor of a constant-current source circuit, the current detection voltage is obtained after amplification by an amplifying circuit with high input impedance, judgment and calculation are performed on the basis of the obtained current detection voltage, current setting voltage, current sampling resistance as well as power voltage of the constant-current source circuit, and the value of the human bodyload impedance can be obtained. Compared with the method which cannot detect human bodyload impedance value in real time in the prior art, the equipment and the method have the advantages that output current can be regulated according to the human bodyload impedance value, and safety is improved.

Description

technical field [0001] The invention belongs to the field of medical equipment, and in particular relates to a human body load impedance detection equipment and method of electric stimulation treatment equipment. Background technique [0002] Electrical stimulation therapy equipment is suitable for the treatment of various types of pain, limb paralysis caused by brain and limb injuries, swallowing disorders, dysarthria and incontinence. [0003] As the load of electrical stimulation therapy equipment, the impedance (including contact impedance) of human skin and tissue varies in a wide range, possibly ranging from hundreds of ohms to infinity. In order to ensure a fixed and controllable current output for different human body load impedances, most of the existing professional electrical stimulation therapy equipment is of the constant current output type. [0004] In actual use, it often occurs that the electrode pads and the patient's skin fall off, resulting in an open ci...

AI Technical Summary

Problems solved by technology

In this case, when the electrode sheet and the skin are pasted again, the high voltage will cause an unexpected instantaneous large current to the human body, which will sting the skin

[0005] In actual use, poor contact between the electrode pad and the skin often occurs, resulting in excessive impedance, and a high voltage will appear between the two electrode pads.

In this case, when the electrode sheet and the skin are pressed again, the higher voltage will cause an unexpected instantaneous large current to the human body, and if it occurs frequently, it will burn the skin

Images