Drug delivery device
AssigneeSociete Industrielle de Sonceboz S.A.
InventorsDavid Staub, Thierry Martin, Nicolas Bailo, Denis Tilloy
Life of this patent
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Abstract
There is described a patch pump comprising a cartridge, a power source, a pump system, a drug delivery device and a control system configured to operate in particular the pump system and the drug delivery device. The pump system includes, on the one hand, a pump having a pump housing containing a pump piston and a valve piston and, on the other hand, a pump drive including a piston motor and a valve motor for driving the pump piston and the valve piston independently from each other through a first and a second transmission. The drug delivery device includes a transdermal delivery system having a needle actuation mechanism configured for transdermal insertion of a cannula.
Claims15
1-25. (canceled)
A pump system for a drug delivery device, comprising a pump drive and a pump having a pump housing comprising inlet and outlet ports and forming a pump chamber containing a pump piston and a valve piston, wherein the pump comprises a valve channel configured to selectively connect and disconnect at least one of the inlet and outlet ports of the pump housing to the pump chamber as a function of the position of the valve piston, wherein the pump piston and the valve piston are linearly slidable along a common axis within the pump chamber, and wherein the valve piston and pump piston are independently actuated.
The drug reconstitution device according to claim 34, when depending upon claim 42, wherein the over-molded part is configured to selectively seal the first and second drug reconstitution ports and the outlet port from the pump chamber.
Method for reconstituting a drug using a pump system comprising a pump drive and a pump having a pump housing comprising first and second ports and an outlet port, the pump housing forming a pump chamber containing a pump piston and a valve piston, wherein the pump comprises a valve channel configured to selectively connect and disconnect at least one of the first and second ports to the pump chamber as a function of the position of the valve piston and wherein the valve piston and the pump piston are independently actuated, the method comprising the following steps:
- i) setting the valve piston in a first axial position in which the first and second ports of the pump housing are in fluid communication;
- ii) urging a first constituent contained in a first container through the valve channel into a second container containing substance second constituent in order to reconstitute the drug inside the second container during a drug reconstitution phase;
- iii) driving the pump piston away from the valve piston along the pump axis to draw the reconstituted drug from the second container into the pump chamber during a chamber filing phase;
- iv) driving the valve piston in a second axial position, upon completion of the chamber filling phase, in which the valve channel is aligned with the outlet port while the first and second ports are closed by the valve piston;
- and
- v) driving the pump piston towards the piston valve along the pump axis to expel the reconstituted drug from the pump chamber, through the valve channel and the outlet port during a drug administration phase.
Dependencies are inferred from the claim text.