Catheter Assembly

A catheter assembly for passing an occlusion in a vessel, comprising:

• a catheter hub;
• a hollow flexible shaft extending between the catheter hub and a distal end, wherein the shaft comprises a cannula lumen with a cannula opening at the distal end, the cannula lumen being configured to guide a cannula, and at least one cutting wire lumen;
• a cutting wire provided inside the shaft, the cutting wire extending through the cutting wire lumen from a cutting wire carrier within the catheter hub to a cutting wire opening at the distal end;
• a cannula carrier, provided within the catheter hub, the cannula carrier being configured to receive a cannula and being aligned with the cannula lumen whereby a cannula can pass through the cannula carrier and through the cannula lumen;
• wherein the cannula carrier and the cutting wire carrier are slideably received within the catheter hub to allow extension and retraction of the respective cannula and cutting wire and the catheter hub is configured to operate selectively in a cutting wire mode and in a cannula mode,
• wherein
• in cutting wire mode a user can act on the cutting wire carrier to move the cutting wire to extend from the cutting wire opening and to be retracted into the shaft;
• in cannula mode the user can act on the cannula carrier to move the cannula to extend from the cannula opening;
• and
• wherein the catheter hub further comprises a blocking mechanism, configured to block movement of the cannula carrier while the cutting wire extends from the cutting wire opening.