FILTERING SYRINGE Russian patent published in 2018 - IPC A61M5/31 

FIELD: medicine.

SUBSTANCE: present invention relates to a filtering syringe and, in particular to a device obtained by improving the syringe equipped with filtration means for filtering such impurities as ampule glass fragments. Said filtering syringe includes an injection needle, a cylinder and a plunger, and additionally includes a suction flow channel formed from the container with the liquid drug to the cylinder; an injection flow channel formed from the cylinder to the injection needle; filtering means and one-way valve means provided in the suction flow channel; and detachable opening / closing means provided in the injection flow channel, wherein the portion of the suction flow channel, extending from the container with the liquid drug to the filtration means, is formed independently of the outer peripheral surface of the injection needle and the injection flow channel. Said filtering syringe is formed so that the injection needle or injection flow channel is isolated from the suction flow channel, which is in front of the flow from the filtration media, and in which impurities can remain along with the liquid drug, and so that the filtration means and the one-way valve means causing the greatest force required when sucking the liquid drug is provided outside, which makes it possible to absorb a liquid drug with less effort than is required for a conventional syringe, and, therefore, maximizes user friendliness and product quality of the syringe.

EFFECT: prevention of contamination of the injection needle or injection flow channel by impurities is achieved, while ensuring smooth absorption of the liquid drug with little effort.

11 cl, 25 dwg