Implantable infusion pump
First Claim
1. Implantable infusion pump for dosed emission of medicines into the human body,comprising a pump chamber formed by a lower chamber portion and an upper chamber portion connected thereto, wherebythe pump chamber is separated by a flexible membrane into two sectional chambers, of which the first sectional chamber is defined by the upper chamber portion and the membrane and is formed as the medicine reservoir, the upper chamber portion comprises a refill aperture sealed by at least one pierceable septum which is locked between a septum holder part connected to the upper chamber portion and the upper chamber portion,the medicine reservoir is connected through an outlet aperture and an outlet reducer means with an outlet catheter andthe second sectional chamber is defined by the lower chamber portion and the membrane and is formed as a pressure chamber to accommodate a motive substance, and wherein internal pressure strain is generated under normal operating load;
- the infusion pump comprising;
the lower chamber portion and the upper chamber portion being in engagement by at least two associated connections, one of which being a main connection located proximal to said chambers and the other of which being an ancillary connection located distal to said chambers whereby thethe main connection substantially supports the infusion pump against said internal pressure strain generated under normal operating load and, in the case of deformation of the lower chamber portion, the upper chamber portion and the septum holder part or slippage between the upper chamber portion and the lower chamber portion caused by a pressure increase above normal operating pressure and in the case of failure or deflection of the main connection, the ancillary connection is subjected to corresponding stress and supports the infusion pump against the pressure overload.
6 Assignments
0 Petitions
Accused Products
Abstract
The invention concerns an implantable infusion pump for dosed emission of medicines into the human body comprising a pump chamber formed by an upper chamber portion (3) and a lower chamber portion (2), whereby said pump chamber is divided by a flexible membrane (6) into a pressure chamber (8) and a medicine reservoir (7). Refill apertures (12, 14) covered by septa (13, 15) are further provided. The septa (13, 15) are hermetically clamped by holders (4, 5). According to the invention, catch connections are used as main connections (31, 32, 33) and as ancillary connections (34, 35) for the connection of the pump components (2, 3, 4, 5), whereby the main connections (31, 32, 33) substantially support the interior pressure strain generated under normal operating load and the locked ancillary connections (34, 35) are hereby not or only nimimally brought into operation due to respective arrangement and dimensioning of the catch members. The ancillary connections (34, 35) are only activated in the case of a further pressure increase due to overload or failure of the main connections (31, 32, 33).
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Citations
9 Claims
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1. Implantable infusion pump for dosed emission of medicines into the human body,
comprising a pump chamber formed by a lower chamber portion and an upper chamber portion connected thereto, whereby the pump chamber is separated by a flexible membrane into two sectional chambers, of which the first sectional chamber is defined by the upper chamber portion and the membrane and is formed as the medicine reservoir, the upper chamber portion comprises a refill aperture sealed by at least one pierceable septum which is locked between a septum holder part connected to the upper chamber portion and the upper chamber portion, the medicine reservoir is connected through an outlet aperture and an outlet reducer means with an outlet catheter and the second sectional chamber is defined by the lower chamber portion and the membrane and is formed as a pressure chamber to accommodate a motive substance, and wherein internal pressure strain is generated under normal operating load; - the infusion pump comprising;
the lower chamber portion and the upper chamber portion being in engagement by at least two associated connections, one of which being a main connection located proximal to said chambers and the other of which being an ancillary connection located distal to said chambers whereby the the main connection substantially supports the infusion pump against said internal pressure strain generated under normal operating load and, in the case of deformation of the lower chamber portion, the upper chamber portion and the septum holder part or slippage between the upper chamber portion and the lower chamber portion caused by a pressure increase above normal operating pressure and in the case of failure or deflection of the main connection, the ancillary connection is subjected to corresponding stress and supports the infusion pump against the pressure overload. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- the infusion pump comprising;
Specification