A catheter includes a shaft, a sealing balloon, a bifurcation sealing element and a camera. The shaft has a distal end for insertion into a clotted blood vessel of a brain of a patient. The sealing balloon, which is fitted at a proximal section of the distal end, is configured to proximally seal a portion of the clotted blood vessel. The bifurcation sealing element is fitted at the distal end, distally to the sealing balloon, and is configured to seal a bifurcation located at the proximally sealed portion of the clotted blood vessel. The camera, which is fitted at a distal edge of the distal end, is configured to visually image a clot that clots the blood vessel.