FLUID INJECTION DEVICE Russian patent published in 2023 - IPC A61M5/20 

FIELD: medical technology.

SUBSTANCE: invention relates to medical technology, namely to a device for introducing a fluid medium. The device contains a cylinder (16, 116), which has an open outlet end (17), a piston (36), which can move between the front and rear extreme positions in the cylinder (16, 116) and connects to the piston rod (35), which protrudes in the first direction for the rear end of the cylinder (16, 116) opposite the open outlet end (17) and is directed to the receiving unit (10), a non-return valve (18) closing the open outlet end (17), and a load generating device (S) that connects to the piston rod (35, 135) and is placed in the receiving unit (10). In this case, the load generating device (S), when the piston (36) is in its forward extreme position, can move the piston rod (35, 135) in the action of applying the load in the first direction until the piston (36) is in its rear extreme position, in order to thereby fill the cylinder (16, 116) with the fluid to be injected, and in order to pre-apply the load to the piston rod (35, 135) in the direction of the open outlet end (17). In this case, the load generating device (S), when the piston (36) is in its rear extreme position, can release the piston rod (35, 135) in the output operation, and, consequently, the piston (36) moves opposite to the first direction to its front extreme position due to the applied preload, and, in the process, the fluid in the cylinder (16, 116) is discharged through a non-return valve (18). In this case, the cylinder (16, 116) together with the non-return valve (18) is presented in the form of a replaceable front assembly (13, 14), which is connected in a detachable way to the receiving unit (10).

EFFECT: expansion of the range of medical equipment.

15 cl, 17 dwg