Device for medical use (100) comprising an injector body without needle (104), at the distal or distal and rear end of which an ampule (101) is connected, containing a medicine to be injected, said device (100) being used to apply a desensitization and/or immunostimulant or any other type of medicine therapy to an underskin tissue, and being characterized in that comprising: - a propulsor element, in example composed of a container in which a compressed gas is contained said container being connected to a opening/closing mechanism of electric and/or mechanic type, activated by an operator, and able to eject said gas with high pressure towards said ampule (101), so that said medicine to be injected is ejected with high pressure inside the underskin tissue - a pressure detector, composed of: a primary container (204), with said ampule (104) contained inside, where the distal end of said primary container (204) is protruding at its front part, and having a spring (205) connected at its rear part a secondary container (206) with said primary container (204) and said spring (205) are contained inside, so that the pressure at the end of the primary container (204) causes a compression of the spring (205), and its displacement is detected by a position of a cursor on a measuring scale that is connected to a first electronic circuit - an electrical conductivity detector, composed of: a first terminal, placed at the right border in the distal end of said primary container (204), and a second terminal, placed at the left border in the distal end of said primary container (204), so that applying a voltage between said first and second terminals a weak electric current is generated, the intensity of which is proportional to the type of tissue that is in touch with the device (100), and said intensity is detected by a second electronic circuit.Linvention concerne un dispositif à usage médical (100) comprenant un corps dinjecteur sans aiguille (104), à lextrémité distale ou à lex
