CATHETER FOR INSERTION INTO A BLOOD VESSEL

摘要

The invention relates to a catheter (10) for insertion into a blood vessel of a living being. The catheter comprises at least one tubular supply line (12) into which a rinsing gas flows continuously, and at least one tubular discharge line (10, 14) from which the rinsing gas continuously entering the supply flows outward. For this purpose, the front ends of the supply and discharge line which are inserted into the blood vessel are fluidically connected. The catheter also comprises at least one membrane (16) which is permeable for blood gases and which part of the supply and/or discharge line of the catheter in contact with the blood. According to the invention, a capillary is arranged in the supply and/or discharge line, one end thereof being connected to a gas analyser arranged outside the human being and the other open end being arranged close to the membrane which is permeable for blood gases. Said open end of the capillary is oriented in such a way that the rinsing gas also flows continuously into the open end of the capillary.