Catheter devices for chronic total occlusion recanalisation

A catheter device for recanalisation of an occlusion in a vessel, comprising:

• a catheter shaft extending along a longitudinal axis having a distal end portion,
• a proximal balloon arranged at the distal end portion, the proximal balloon being sized for anchoring the catheter shaft in the vessel and for opening the occlusion, wherein the proximal balloon has a balloon interior into which a fluid medium can be introduced to expand the proximal balloon,
• a distal balloon arranged at the distal end portion distally from the proximal balloon, the distal balloon being sized for initially opening the occlusion, wherein the distal balloon has a balloon interior into which a fluid medium can be introduced in order to expand the distal balloon,
• a guide wire lumen surrounded by the catheter shaft,
• a guide wire configured to be guided in the guide wire lumen, and
• an opening at the distal end portion of the catheter shaft via which the guide wire can be guided out from the guide wire lumen and from the catheter shaft, wherein
• the opening is arranged such that the guide wire can extend with a portion of the guide wire outside the distal balloon.