Patent ID: 8777890

Claim:
A method for administering a liquid medical substance in a vein, comprising: inserting an intrabody device having an intrabody device tip and at least one administration duct and at least one withdrawing duct into a target venous lumen; performing the following while moving the intrabody device tip along said target venous lumen: applying, at a first direction, a medical liquid quantity of a liquid medical substance in an ejection pressure for ablating said venous lumen via at least one outlet of said at least one administration duct in said intrabody device tip for the administering of said liquid medical substance toward a venous wall at said target venous lumen; and applying a suction pressure to withdraw at a second direction a residue quantity of a residue of said liquid medical substance from said target venous lumen: via said at least one withdrawing duct, said suction pressure is applied via first and second inlets of said at least one withdrawing duct in said intrabody device tip; wherein a relation between said ejection pressure, said medical liquid quantity and said first direction and said suction pressure, said residue quantity and said second direction limits the medical liquid quantity within said venous lumen to a limited space of less than 4 cubic centimeter centered around any of the at least one outlet while the intrabody device tip is moved along said target venous lumen; wherein said at least one outlet is placed along said at least one administration, between said first inlet and said second inlet; wherein said withdrawing and said administering are performed simultaneously.