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

Claim 0:
1. A sampling unit to be used in a system for transcutaneous blood gas measurement, comprising:
a sensor unit, a tube and a pump, the pump enabling a gas flow into the sampling unit through the tube and to the sensor unit, the sensor unit configured to measure a gas composition of the gas flow, the sampling unit 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;
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.