Patent ID: 8048059
Filing Date: 2011-11-01
Classification: A61M

Abstract:
1. A catheter comprising: a first conduit defining a first lumen having a first proximal end and a first distal end portion concluding in a first distal tip; a second conduit defining a second lumen having a second proximal end and a second distal end portion concluding in a second distal tip extending distally beyond the first distal tip and having a generally circular cross section, wherein the second distal tip comprises a generally internally concave portion having formed therein at least two slits together bisecting the second distal tip and wall sections thereof, the slits extending proximally from the second distal tip for a selected length, whereby the slit-divided portions of the second distal tip are movable apart; and a septum separating the first and second lumens, wherein wall sections of the first and second distal tips define respective first and second valves that are normally closed and are openable in response to relative pressure imbalances inside and outside the respective first and second lumens, but wherein the second valve only opens outwardly, under positive pressure inside the second lumen.