Cannula for use in drug delivery systems

Details Cannula for use in drug delivery systems Cannula for use in drug delivery systems

A - Human Necessities

61

J

A61J 1/20 (2006.01) A61M 5/14 (2006.01) B65D 25/08 (2006.01)

Patent

CA 2119124

The present invention provides an improved cannula (22) that can be used to reconstitute powdered drugs in a drug delivery system. Furthermore, the present invention provides a cannula (22) and drug delivery system incorporating same. To this end, the present invention provides a cannula structure for use in a reconstitution of a powdered drug comprising a cannula (22) leaving a first end (26) and a second end (28), and defining a channel in an interior thereof between the first and second ends (26, 28). The first end (26) is closed and includes a member (27) for piercing a septum (42). The cannula (22) includes at least two slots (50a, 50b) providing fluid communication between the channel and an exterior of the cannula (22). The slots (50a, 50b) are located in juxtaposition to the first end (26) and have a width; as measured along a length of the cannula (22), that is less than a length, as measured around the cannula (22). The slots (50a, 50b) also have a minimum projected area equal to or greater than the cross-sectional area of the channel.

La présente invention concerne une canule améliorée (2) qui peut être utilisée pour reconstituer des médicaments en poudre dans des systèmes d'administration de médicaments. De plus, la présente invention concerne une canule (22) et un système d'administration de médicaments comprenant celle-ci. A cette fin, la présente invention fournit une structure de canule destinée à la reconstitution d'un médicament en poudre comprenant une canule (22) présentant une première extrémité (26) et une seconde extrémité (28), et définissant un canal intérieur entre les première et seconde extrémités (26, 28). La première extrémité (26) est fermée et comprend un élément (27) pour percer un septum (42). La canule (22) comprend au moins deux fentes (50a, 50b) assurant une communication fluide entre le canal et l'extérieur de la canule (22). Les fentes (50a, 50b) jouxtent la première extrémité (26) et ont une largeur mésurée le long de la canule (22) qui est inférieure à la longueur mesurée autour de la canule (22). Les fentes (50a, 50b) ont également une surface de projection minimale égale ou supérieure à la surface transversale du canal.

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