FIELD: medicine.
SUBSTANCE: syringe for multiple doses comprises: first valve, which determines first valve opening pressure, wherein first valve includes an elastic element, forming closed under normal conditions, extended in axial direction, butt valve with inlet and outlet opening; second valve, which determines second valve opening pressure, connected to communicate with outlet chamber for storage of multiple doses of substances; and compression surface to displace between first and second positions, and compression chamber formed between surface of compression and first valve; and connector arranged on distal end of syringe, at least partially surrounding outlet valve and connected with delivery element for introduction of issued dose substance into patient. At that, (i) compression surface displacement in direction from first position to second position creates pressure difference at the first valve, which exceeds first valve opening pressure, and outputs dose of substance in compression chamber via first valve from syringe, and (ii) movement of surface of compression in direction from second position to first position creates pressure difference at second valve, exceeding opening pressure of second valve, and makes another dose of substance to flow from storage chamber through second valve in compression chamber. At that, flexible element is configured to maintain compression chamber and any substance in it tightly isolated from environment while delivering substance through outlet valve joint. At that, outlet valve interface is configured to communicate with delivery element connected to connector, without any structures between them.
EFFECT: proposed is structure of syringe for multiple doses.
32 cl, 20 dwg
