Catheter with changeable number of lumens

Details Catheter with changeable number of lumens Catheter with changeable number of lumens

A - Human Necessities

61

M

A61M 25/00 (2006.01) A61M 25/06 (2006.01)

Patent

CA 2101857

A catheter assembly (10) is provided. An attachment structure (22) has a proximal end portion (24) of an outer cannula (28) attached to it. A needle (18) is insertable through the outer cannula (28) and the attachment structure (22). An inner cannula (52) is attached to an inner cannula attachment region of the attachment structure (22). The inner cannula (52) is insertable axial- ly through the attachment structure (22). The attachment structure (22) can comprise two hubs (38) one for the outer cannula (28) and the other for the inner cannula (52), the two hubs (38) being attachable to one another to form the overall attachment struc- ture (22). A valve structure (70) is associated with the attachment structure (22), suitably with the outer cannula hub (22). The valve structure (70) normally closes communication between an access passage in the attachment structure (22) and the outer can- nula lumen (34).

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