A catheter for intravascular use has a blood inlet and a blood outlet, and includes a membrane arranged in the catheter in such a way that at least one part of the blood flowing into the catheter via the blood inlet during operation comes into contact with the membrane. The membrane allows an exchange of at least one substance between a carrier medium and the blood. The carrier medium is a carrier fluid in which the substance to be exchanged can be dissolved, and the catheter includes a delivery device that is designed to at least partially compensate for a pressure difference between the blood inlet and the blood outlet during operation. A method for removing at least one substance from venous blood for diagnostic purposes uses a device of this type.

The present disclosure describes intravascular oxygenation systems and methods with one or more of improved oxygen diffusion flux, improved resistance to bubble formation on the surface of non-porous hollow fibers, and reduced size. The systems and methods include a pneumatic inlet coupled to a pneumatic source that provides a gas containing oxygen at a high pressure. A plurality of hollow fiber membranes (HFM) are in pneumatic communication with the pneumatic inlet to receive the gas containing oxygen and with an outlet to exhaust a partially deoxygenated gas. An electronic controller drives the motor to oscillate the plurality of HFMs to cause a diffusive flux of the gas containing oxygen from the plurality of HFMs into a region of interest of a subject. The electronic controller may drive the motor according to an oscillation pattern, which may include a macro-oscillation with superimposed micro-oscillations.

The present disclosure relates to intracorporeal gas exchange systems and methods in conditions associated with hypoxia and hypercarbia. The present disclosure envisages an intracorporeal oxygenation system comprising a blood oxygenator having a blood compartment and a gas compartment. The blood and gas compartments are separated by a gas permeable barrier so as to allow exchange of carbon dioxide in blood in the blood compartment with oxygen in the gas compartment. The system comprises a catheter device for insertion in a blood vessel of human comprising an interior portion and an exterior portion wherein the interior portion (100a) comprises an annular housing, a plurality of capillary conduit, a pumping device, an air sensing device, a blood sensor and a collar. The present disclosure also relates to a method of oxygenating a deoxygenated blood in a human and also to a method for treating a human suffering from hypoxia or hypercarbia.

The present disclosure relates to intracorporeal gas exchange systems and methods in conditions associated with hypoxia and hypercarbia. The present disclosure envisages an intracorporeal oxygenation system comprising a blood oxygenator having a blood compartment and a gas compartment. The blood and gas compartments are separated by a gas permeable barrier so as to allow exchange of carbon dioxide in blood in the blood compartment with oxygen in the gas compartment. The system comprises a catheter device for insertion in a blood vessel of human comprising an interior portion and an exterior portion wherein the interior portion (100a) comprises an annular housing, a plurality of capillary conduit, a pumping device, an air sensing device, a blood sensor and a collar. The present disclosure also relates to a method of oxygenating a deoxygenated blood in a human and also to a method for treating a human suffering from hypoxia or hypercarbia.