Portable infusion system including step switch mechanism for valve control
An infusion system, portable technology, applied in the field of connecting drug delivery unit and driving unit, can solve large-scale expensive and complicated problems
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[0037] figure 1 Dosing unit 100 and drive unit 200 are shown, as well as liquid drug reservoir 300 . It should be noted that only those structural and functional elements are shown which in view of the disclosure of the invention are particularly relevant. Other units such as electronic control units, power supplies, user interfaces etc. are usually present as well.
[0038] The dosing unit 100 comprises a metering pump unit 110 comprising a dosing cartridge having an aperture and a piston (elements not separately numbered) as described above in the overview. In the proximal front wall of the drug cartridge, a hole is arranged as a fluid port coupled to pump port 127a. The dosing unit also comprises a valve unit which can be alternately in the filling state 120b or the discharging state 120a. During operation, the valve unit repeatedly switches between these states. The reservoir 300 is fluidly coupled to the valve unit via the fill port 127b of the valve unit. The patien...
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