RU97112201A - PARTICLE FEEDING SYSTEM - Google Patents

Claims (13)

1. A needleless syringe containing a housing (13, 17; 28) including a cavity (14, 18; 30), the upper end of which is connected or designed to connect to a gas source (10) under pressure, which can be sharply introduced into the cavity, the lower end the cavity ends behind the bistable diaphragm (21, 32), which is arranged to move between the inverted position, in which it represents a concavity outside the housing for containing particles (23, 33) of the therapeutic agent, and turned inside out curved outward position, and the device This is done in use in this way, when they are introduced into the cavity under pressure, the diaphragm instantly passes from its inverted position to its inside-out position and throws particles out.  2. The syringe according to claim 1, in which the upper end of the cavity (14, 18; 30) is initially closed by a rupture membrane (20), which, when exposed to gas under sufficient pressure, is capable of bursting and sharply releasing gas into the cavity.  3. The syringe according to claim 1 or 2, in which the cavity (14, 18; 30) initially contains a gas that is lighter than air.  4. A syringe according to any one of the preceding paragraphs, in which particles (23, 33) of the therapeutic agent are located at the concavity of the inverted diaphragm.  5. The syringe according to claim 4, in which the particles in concavity are covered with a retractable safety shield (35).  6. A syringe according to claim 4, in which the particles in the cavity are coated with a thin protective film (22), through which the particles easily and simply penetrate after their release.  7. A syringe according to any one of the preceding paragraphs, in which the cavity-containing body is a tubular nozzle (14, 18) and the diaphragm (21) is formed adjacent to the lower end of the nozzle and faces essentially the axial direction of the nozzle.  8. The syringe according to claim 7, in which the tubular gasket (26) protrudes from the nozzle below the diaphragm.  9. A syringe according to any one of paragraphs. 1-6, in which the cavity containing body is a catheter (28).  10. A syringe according to claim 9, in which the diaphragm (32) is formed on the side wall of the catheter body, so that after turning the diaphragm inside out particles (33) receive lateral movement from the body.  11. The product for therapeutic use, containing the syringe block according to any one of the preceding paragraphs, the block contains a domed diaphragm, on the concave side of which the particles of the therapeutic agent are fixed, and the diaphragm itself is adapted for sharp turning inside out under the influence of a gaseous shock wave supplied to the curved side domes, whereby particles are pushed out of the diaphragm.  12. The product according to claim 11, in which the particles are sealed between the concave side of the diaphragm and a covering protective film that is sealed on the diaphragm.  13. A method of therapeutic treatment by injecting particles of a therapeutic agent into body tissue, comprising the steps of forming particles in the concave side of the domed diaphragm and supplying a gaseous shock wave to the curved side of the dome, as a result of which the dome sharply turns inside out and ejects the particles out of the diaphragm.