Method and systems for the delivery of oxygen enriched gas
Described herein are various embodiments of an oxygen concentrator system and method of delivering oxygen enriched gas to a user. In some embodiments, oxygen concentrator system includes one or more components that improve the efficiency of oxygen enriched gas delivery during operation of the oxygen concentrator system. In some embodiments, time measurements based on the penultimate breath taken by the user are used to alter the oxygen delivery parameters.
1. A method for controlling release of oxygen enriched gas to a user of an oxygen concentrator that has a sleep mode and an active mode, comprising:
measuring the time between a plurality of successive breaths, wherein a breath is determined to begin when a drop in pressure is measured using a pressure sensor coupled to an outlet of a conduit coupling the user to an oxygen enriched gas source;
determining an average time between each of the successive breaths, wherein the time between the penultimate breath and the last breath is not used to determine the average time;
setting an inspiration breath pressure threshold for the pressure sensed by the pressure sensor based on the determined average time, including:
setting the inspiration breath pressure threshold to an active mode breath pressure threshold in response to a determination that the average time is less than a predefined time, and
setting the inspiration breath pressure threshold to a sleep mode breath pressure threshold in response to a determination that the average time is greater than the predefined time, wherein the sleep mode breath pressure threshold is lower than the active mode breath pressure threshold;
measuring the time since the penultimate breath and the time since the last breath in the sleep mode and determining a sum of the time since the penultimate breath plus the time since the last breath; and
automatically controlling release of oxygen enriched gas to the user in response to an evaluation that determines whether the sum is greater than a function of the determined average time.
2. The method of claim 1 , wherein the predefined time is between about 8 seconds and about 12 seconds.
3. The method of claim 1 , wherein the function of the determined average time is a constant times the determined average time, wherein the constant is between 1.5 and 2.5.
4. The method of claim 1 , further comprising measuring the time since the penultimate breath, wherein if two breaths are not received within a predetermined time, a false breath time is added to the successive breaths from which the average time between each of the successive breaths is determined.
5. The method of claim 1 , wherein the method comprises measuring the time between at least six successive breaths, wherein the time between the 5th breath and the 6th breath is not used to determine the average time.
6. The method of claim 1 , wherein adjusting the inspiration breath pressure threshold based on the average time is performed automatically.
7. The method of claim 1 , wherein the automatically controlled release of oxygen enriched gas controls release to the user every 3-4 seconds.
8. The method of claim 7 , wherein the time between each automatically controlled release of oxygen enriched gas is varied randomly between 3-4 seconds.
9. The method of claim 7 , wherein the time between each automatically controlled release of oxygen enriched gas is varied by a constant amount, cycling between 3-4 seconds.
10. The method of claim 1 , wherein the automatically controlled release of oxygen enriched gas to the user is discontinued if a breath is detected from the user.
11. The method of claim 1 , wherein the oxygen enriched gas source is an oxygen concentrator system.
12. The method of claim 1 , wherein the oxygen enriched gas source is an oxygen tank.
13. An oxygen concentrator apparatus, comprising:
a pressure sensor, the pressure sensor configured to detect a breath pressure of a user; and
a processor coupled to the pressure sensor and configured to execute non-transitory program instructions, and wherein the program instructions configure the processor to execute the method for controlling release of oxygen enriched gas according to claim 1 .
14. The oxygen concentrator apparatus of claim 13 , further comprising an oxygen sensor coupled to the processor, wherein the oxygen sensor is capable of detecting oxygen in a gas during use.
15. The oxygen concentrator apparatus of claim 13 , wherein the oxygen concentrator weighs less than 5 lbs.
16. The oxygen concentrator apparatus of claim 13 , further comprising:
at least two canisters; and
gas separation adsorbent disposed in the at least two canisters, wherein the gas separation adsorbent separates at least some nitrogen from air in the canister to produce oxygen enriched gas.
17. A method for controlling release of oxygen enriched gas to a user of an oxygen concentrator, comprising:
measuring the time between a plurality of successive breaths;
measuring the time since a penultimate breath was taken and the time since a last breath, wherein a breath is determined to begin when a drop in pressure is measured using a pressure sensor coupled to an outlet of a conduit coupling the user to an oxygen enriched gas source;
determining an average time between each of the successive breaths, wherein the time between the penultimate breath and the last breath is not used to determine the average time;
determining a sum of the time since the penultimate breath plus the time since the last breath; and
automatically controlling release of oxygen enriched gas to the user in response to an evaluation that determines whether the sum is greater than a function of the determined average time.
18. The method of claim 17 , wherein the automatically controlling release of oxygen enriched gas controls release of oxygen enriched gas to the user every 3-4 seconds.
19. The method of claim 17 , wherein the time between each automatically controlled release of oxygen enriched gas is varied randomly between 3-4 seconds.
20. The method of claim 17 , wherein the time between each automatic controlled release of oxygen enriched gas is varied by a constant amount, cycling between 3-4 seconds.
21. The method of claim 17 , wherein the automatically controlled release of oxygen enriched gas to the user is discontinued if a breath is detected from the user.
22. The method of claim 17 , wherein the oxygen enriched gas source is an oxygen concentrator system.
23. The method of claim 17 , wherein the oxygen enriched gas source is an oxygen tank.
24. An oxygen concentrator apparatus, comprising:
a pressure sensor configured to detect a breath pressure of a user, the pressure sensor coupled to an outlet of a conduit for coupling the user to an oxygen enriched gas source; and
a processor coupled to the pressure sensor and configured to:
measure the time between a plurality of successive breaths;
measure the time since a penultimate breath was taken and the time since a last breath, wherein a breath is determined to begin when a drop in pressure is measured using the pressure sensor;
determine an average time between each of the successive breaths, wherein the time between the penultimate breath and the last breath is not used to determine the average time;
determine a sum of the time since the penultimate breath plus the time since the last breath; and
automatically control release of oxygen enriched gas to the user in response to an evaluation that determines whether the sum is greater than a function of the determined average time.
25. The oxygen concentrator apparatus of claim 24 , wherein the automatically controlled release of oxygen enriched gas controls release of oxygen enriched gas to the user every 3-4 seconds.
26. The oxygen concentrator apparatus of claim 24 , wherein the time between each automatically controlled release of oxygen enriched gas is varied randomly between 3-4 seconds.
27. The oxygen concentrator apparatus of claim 24 , wherein the time between each automatically controlled release of oxygen enriched gas is varied by a constant amount, cycling between 3-4 seconds.
28. The oxygen concentrator apparatus of claim 24 , wherein the automatically controlled release of oxygen enriched gas to the user is discontinued if a breath is detected from the user.