DEVICE FOR DRUG DELIVERY Russian patent published in 2017 - IPC A61M5/315 

FIELD: medicine.

SUBSTANCE: device contains: a syringe with a body from which a needle extends; an inner casing adapted to move between a retracted position in which the needle projects beyond the distal end of the inner casing and an extended position in which the needle is covered by the inner casing; a support casing configured to hold the body, and also to hold the inner casing in retracted and extended position; a piston rod comprising a piston, wherein the piston rod can be moved from the first position in which the piston rod is withdrawn to the second position in which the drug delivery process is completed, as well as an actuating head. In this case, the actuating head is attached at the proximal end of the piston rod. The support housing comprises a proximal section, the proximal section of the support housing and the actuating head comprising respective indicators providing visual feedback when the piston rod is in the second position. The corresponding indicators are made in the form of coloured marks. The marks are formed as: fragmented marks, the actuating head and the supporting casing correspondingly comprise a plurality of fragmented marks or material colouring, wherein the support casing material is at least sectionally is coloured translucent material or transparent material. The degree of transparency or colour of the translucent material of the support casing substantially corresponds to the degree of transparency or colour of the material of the actuating head.

EFFECT: use of the invention provides feedback on the position of the piston rod after full delivery of the drug substance.

18 cl, 16 dwg