| abstract |
Described is an infusion pump comprising electronic infusion regulating means with wired or wireless communication means and a power source, a medicament bag ( 7 ) and an infusion device, said infusion device being in fluid communication with said medicament bag ( 7 ) and comprising two valves ( 1, 2 ), a pressure cavity ( 4 ) provided between said two valves ( 1, 2 ) and a membrane ( 3 ) covering said cavity ( 4 ), wherein said infusion device comprises at least two active actuators, preferably either made of electroactive polymer so as to form a self actuating membrane ( 3 ) or made of shape memory alloy wire, one of said actuators being adapted to apply pressure to said membrane ( 3 ) for fluid displacement in said cavity ( 4 ), and the other of said actuators being adapted to operate one of said valves which is adapted to passively close in the flow direction of a fluid from said medicament bag ( 7 ) through the cavity ( 4 ), wherein the other of said valves is adapted to, in particular passively, close in a direction opposite to said flow direction. |