Thrombotic material extraction

A method for extracting thrombotic material from a head blood vessel comprising:

• providing a catheter in the head blood vessel, the catheter comprising:
• a suction sheath to extract the thrombotic material from a distal side to a proximal side of the catheter;
• an inflation sheath to feed an inflatable balloon to occlude the blood vessel in an inflated state, the inflatable balloon being arranged at a distal end of the inflation sheath;
• wherein the suction sheath has a tubular extension which extends beyond the distal end of the inflation sheath, the length of the extension being defined such that a distal tip of the extension is placed downstream the ophthalmic segment of the internal carotid artery when the distal end of the inflation sheath is placed upstream the ophthalmic segment;
• wherein the distal end of the suction sheath is placed downstream the ophthalmic segment of the internal carotid artery when the distal end of the inflation sheath is placed upstream the ophthalmic segment;
• inflating the balloon upstream the ophthalmic segment;
• extracting the thrombotic material from downstream the ophthalmic segment.

A method for extracting thrombotic material from a head blood vessel comprising:

• providing a catheter in the head blood vessel, the catheter comprising:
• a suction sheath to extract the thrombotic material from a distal side to a proximal side of the catheter;
• an inflation sheath to feed an inflatable balloon to occlude the blood vessel in an inflated state, the inflatable balloon being arranged at a distal end of the inflation sheath;
• wherein the suction sheath has a tubular extension which extends beyond the distal end of the inflation sheath, the length of the extension being defined such that a distal tip of the extension is placed downstream the ophthalmic segment of the internal carotid artery when the distal end of the inflation sheath is placed upstream the ophthalmic segment;
• wherein the distal tip of the extension is placed in the middle cerebral artery when the distal end of the inflation sheath is placed in the petrous part or the cavernous part of the internal carotid artery;
• inflating the balloon in the petrous part or the cavernous part of the internal carotid artery;
• extracting the thrombotic material from the middle cerebral artery.