Patent ID: 9211385
Filing Date: 2015-12-15
Classification: A61M

Abstract:
1. A tracheostomy cannula comprising an outer cannula tube, wherein the outer cannula tube has a bend with a radially inward side and a radially outward side of the outer cannula tube, and a tube lumen, and a tube wall and an axis extending parallel to the tube wall in the tube lumen, and a distal end and a proximal end, and a first window region having at least one opening in the side of the tube wall of the outer cannula tube, characterised in that the outer cannula tube has, in axially displaced relationship with the first window region, at least a second window region separate from the first window region having at least one opening in the tube side wall; the tracheostomy cannula being further characterised in that the tracheostomy cannula has an inner cannula tube having a tube wall and a tube lumen, which inner cannula tube can be inserted into the outer cannula tube; wherein the inner cannula tube has a first and second inner window regions corresponding to the first and the second window regions of the outer cannula tube and having at least one opening in the inner cannula tube wall which at least partially respectively overlaps in the axial direction with the respective first window region or the second window region of the outer cannula tube; further characterised in that the distal portion of the inner cannula tube terminates in sealing engagement with the distal portion of the outer cannula tube, further characterised in that the second window region of the outer cannula tube is arranged displaced relative to the first window region of the outer cannula tube in the peripheral direction of the outer cannula tube about the axis thereof, and characterised in that at least one of the first window region and the second window region of the outer cannula tube have a plurality of openings in the tube wall.