Gas sampling line
A gas sampling line having a channel for conducting respiratory gases from a patient respiratory interface to a gas monitor, the gas sampling line comprising, i.a., a gas sampling tube comprised of a polyether block amide material, the polyether segments of which comprise polyethyleneoxide. Use of a tube comprised of a polyether block amide material, the polyether segments of which comprise polyethyleneoxide, for sampling of respiratory gases; and a method for sampling of respiratory gases, the method comprising conducting respiratory gases through such a tube. A gas analysis system for analysing respiratory gases, comprising a gas sampling line as defined above and a gas monitor connectable to the gas sampling line.
1. A gas sampling line having a channel for conducting respiratory gases comprising:
a gas sampling tube surrounding a portion of the channel;
a drying assembly extends along the outside of the gas sampling tube, wherein the drying assembly comprises:
a casing comprised of a polyether block amide material, wherein the polyether block amide material comprises polyether segments and polyamide segments, and the polyether segments comprise polyethyleneoxide; and
a hydrophilic member disposed within the casing and being in fluid contact with the channel.
2. The gas sampling line according to claim 1 , wherein the gas sampling tube is made by a material that is not permeable by moisture and/or water.
3. The gas sampling line according to claim 1 , wherein the polyamide segments of the polyether block amide material is selected from the group consisting of polyamide-12, polyamide-11, and polyamide-12.12.
4. The gas sampling line according to claim 1 , wherein the polyether segments and the polyamide segments in the polyester block amide material has a ratio from about 60:40 to about 40:60.
5. The gas sampling line according to claim 1 , wherein the drying assembly further comprises a hydrophobic member disposed across the channel.
6. The gas sampling line according to claim 1 , further comprising:
a patient respiratory interface connector adapted to couple the gas sampling line to a patient respiratory interface; and
a gas monitor connector adapted to couple the gas sampling line to a gas monitor.
7. A method for sampling of respiratory gases, the method comprising conducting respiratory gases through the gas sampling line of claim 1 .
8. The method according to claim 7 , wherein the polyamide segments of the polyether block amide material is selected from the group consisting of polyamide-12, polyamide-11, and polyamide-12.12.
9. The method according to claim 7 , Wherein the first polyester block amide material comprises polyether segments and polyamide segments in a ratio of polyether to polyamide from about 60:40 to about 40:60.
10. The method according to claim 7 , wherein the drying assembly further comprises a hydrophobic member disposed across the channel.
11. A gas analysis system for analysing respiratory gases, comprising a gas sampling line as defined in claim 6 and a gas monitor connectable to the gas sampling line.
12. The gas analysis system according to claim 11 , further comprising a respiratory device connectable to the patient respiratory interface.