IMPROVED STRETCH ELASTOMER PUMP FOR THE INFUSION SYSTEM Russian patent published in 2017 - IPC A61M5/152 

FIELD: medicine.

SUBSTANCE: elastomeric pump for the infusion unit contains a central rod with a cylindrical body and a stretchable elastomeric tube. The cylindrical body has a first end and an opposing second end, a length, a constant outer diameter defining the first radius, a central channel extending along the entire length of the rod, a first port located between the first end and the second end and extending from the outer diameter to the central channel, for the fluid, a fill port located at the first end and communicating with mentioned channel and an output port located at the second end and communicating with mentioned channel. A stretchable elastomeric tube is disposed around a central rod between its first and second ends and coaxially with the overlapping of the first port. The tube is sealed to the central rod at its ends and has an initial internal diameter defining a second radius corresponding to the first radius, length, which is less than the length of the central rod, and the wall thickness, chosen taking into account the second radius. The variants of performing the pump, differing in the characteristics of the elastomeric tube, are disclosed.

EFFECT: providing long-term outpatient administration of pharmaceutical fluids at a controlled rate.

14 cl, 8 dwg, 11 tbl