Patent ID: 11963765
Assignee: FOURTH STATE SYSTEMS AB
Field: Medical technology (Instruments)
Classification: CPC A  H | IPC A  H

Claim 12:
13. A system for transcutaneous blood gas measurement for measurement of carbon dioxide, comprising:
a sampling unit including:
a sensor unit,
a tube, and
a pump configured to enable a gas flow into and through the sampling unit and through the tube into and through the sensor unit,

wherein the sensor unit is configured to measure a gas composition of the gas flow,
wherein the sampling unit is configured to during use be attached to the skin of a patient,
wherein the sampling unit is characterized by:
at least one blood gas extraction and mixing cavity in fluid connection with an ambient air inlet and in fluid connection with an outlet configured to be connected to the tube, the at least one blood gas extraction and mixing cavity provided on the side of the sampling unit facing the skin, and
at least one ambient air inlet; wherein the ambient air inlet is arranged to continuously provide ambient air to the at least one blood gas extraction and mixing cavity, and
wherein the combination of the outlet and the tube has an 1-2 times lower flow resistance than the at least one ambient air inlet or the combined flow resistance of a plurality of such ambient air inlets.