Oxygen delivery system

• US 20080110462A1
• Filed: 11/10/2006
• Published: 05/15/2008
• Est. Priority Date: 11/10/2006
• Status: Abandoned Application

• Current Assignee: Delphi Technologies, Inc. (Aptiv PLC)
• Original Assignee: Delphi Technologies, Inc. (Aptiv PLC)
• Inventors: Chekal, Michael P., McClain, Michael S., Pelletier, Dana G.
• Application Number:
  US11/595,375
• Publication Number:
  US 20080110462A1
• Time in Patent Office: Days
• US Class Current: 128/204.26
• CPC Class Codes: A61M 16/10 Preparation of respiratory gases or vapours
• CPC Class Codes: A61M 16/101 using an oxygen concentrator
• CPC Class Codes: A61M 16/107 in the inspiratory path
• CPC Class Codes: A61M 16/209 Relief valves
• CPC Class Codes: A61M 2016/0021 with a proportional output signal, e.g. from a thermistor
• CPC Class Codes: A61M 2016/0039 in the inspiratory circuit
• CPC Class Codes: A61M 2202/0208 Oxygen
• CPC Class Codes: A61M 2230/42 Rate
• CPC Class Codes: B01D 2253/108 Zeolites
• CPC Class Codes: B01D 2256/12 Oxygen
• CPC Class Codes: B01D 2257/102 Nitrogen
• CPC Class Codes: B01D 2259/402 using two beds
• CPC Class Codes: B01D 2259/4533 for medical purposes
• CPC Class Codes: B01D 53/0454 Controlling adsorption controlling temperature swing adsorption B01D53/0462, controlling pressure swing adsorption B01D53/047

Abstract

An oxygen delivery system includes first and second sieve beds configured to selectively receive a supply fluid and separate a substantially oxygen-rich fluid therefrom. A patient conduit having a patient outlet is in alternate selective fluid communication with the sieve beds. The system includes a breath-detection device in fluid communication with the patient conduit, configured to calculate a rate of breathing and to trigger, in response to a breath detection, an output of a predetermined volume of the substantially oxygen-rich fluid alternately from a respective one of the sieve beds. The system also includes a device configured to measure the output flow rate at predetermined intervals. The output, having a target flow rate and a flow rate, occurs during a respective dynamically adjusted patient oxygen delivery phase, which is dependent upon the target flow rate, the output flow rate, and/or the breathing rate.

Claims

1. An oxygen delivery system, comprising:

a supply fluid containing oxygen;

a first sieve bed and a second sieve bed, each in selective fluid communication with the supply fluid, each of the first and second sieve beds configured to selectively receive the supply fluid during a predetermined supply period, and each further configured to separate a substantially oxygen-rich fluid from the supply fluid;

a patient conduit in alternate selective fluid communication with the first and second sieve beds, the patient conduit having a patient outlet;

a breath-detection device in fluid communication with the patient conduit and configured to trigger an output, having a target flow rate and a flow rate, of a predetermined volume of the substantially oxygen-rich fluid alternately from a respective one of the first sieve bed or the second sieve bed via the patient outlet during a respective dynamically adjusted patient oxygen delivery phase in response to a breath inhalation, the breath detection device further configured to calculate a rate of breathing; and

a device in fluid communication with the patient conduit and configured to measure the output flow rate at predetermined intervals;

wherein each of the respective dynamically adjusted patient oxygen delivery phases is dependent upon at least one of the output target flow rate, the output flow rate, the breathing rate, or combinations thereof.

2. The oxygen delivery system of claim 1 wherein the respective one of the first sieve bed or the second sieve bed is configured to transmit, after the respective dynamically adjusted oxygen delivery phase, at least a portion of a remaining amount of the substantially oxygen-rich fluid to a respective other of the second sieve bed or the first sieve bed.

3. The oxygen delivery system of claim 2 wherein each of the first and second sieve beds is configured to adsorb a substantially oxygen-depleted fluid from the supply fluid during the separating;

and

wherein each of the first and second sieve beds is configured to purge the oxygen-depleted fluid substantially after transmitting the at least a portion of the remaining amount of the substantially oxygen-rich fluid to the respective other of the second or first sieve bed.

4. The oxygen delivery system of claim 1 wherein the breath-detection device includes a pressure sensor configured to monitor a pressure of the substantially oxygen-rich fluid in the patient conduit substantially near the patient outlet and to associate a predetermined drop in the pressure with the breath inhalation.

5. The oxygen delivery system of claim 1, further comprising an alert system configured to emit an alarm if detection of the breath inhalation fails to occur within a predetermined amount of time.

6. The oxygen delivery system of claim 5 wherein the predetermined amount of time ranges from about 15 seconds to about 30 seconds.

7. The oxygen delivery system of claim 1, further comprising a filtration system configured to substantially filter particulate matter from at least one of the supply fluid or the substantially oxygen-rich fluid.

8. A method for delivering oxygen, comprising:

selectively supplying, during a predetermined supply period, a fluid containing oxygen to one of a first purifying system or a second purifying system, each of the purifying systems configured to separate the fluid into a substantially oxygen-rich fluid and a substantially oxygen-depleted fluid;

delivering, to a patient conduit in alternate selective fluid communication with the first purifying system and the second purifying system, an output of the substantially oxygen-rich fluid from the one of the first purifying system or the second purifying system during a dynamically adjusted oxygen delivery phase, in response to a breath inhalation, the output having a target flow rate and a flow rate; and

purging the substantially oxygen-depleted fluid from an other of the second purifying system or the first purifying system substantially during the predetermined supply period and the dynamically adjusted oxygen delivery phase.

9. The method of claim 8, further comprising masking detection of the breath inhalation during the dynamically adjusted oxygen delivery phase and during a predetermined amount of time following the delivery phase.

10. The method of claim 8, further comprising transmitting, from the one of the first purifying system or the second purifying system, at least a portion of a remaining amount of the substantially oxygen-rich fluid to the other of the second purifying system or the first purifying system after the dynamically adjusted oxygen delivery phase.

11. The method of claim 8, further comprising:

monitoring a pressure of the substantially oxygen-rich fluid in the patient conduit; and

associating a predetermined drop in the pressure with the breath inhalation.

12. The method of claim 11, further comprising:

resolving a breathing rate based upon a sequence of a plurality of the breath inhalations; and

adjusting the dynamically adjusted patient oxygen delivery phase based upon at least one of the output target flow rate, the output flow rate, the breathing rate, or combinations thereof.

13. The method of claim 11, further comprising emitting an alarm if breath inhalation fails to occur within a predetermined amount of time.

14. The method of claim 13 wherein the predetermined amount of time ranges from about 15 seconds to about 30 seconds.

15. The method of claim 8, further comprising:

selectively supplying, during an other predetermined supply period, the fluid to the other of the second purifying system or the first purifying system;

delivering, to the patient conduit, an output of the substantially oxygen-rich fluid from the other of the second purifying system or the first purifying system during an other dynamically adjusted oxygen delivery phase, in response to an other breath inhalation; and

purging the substantially oxygen-depleted fluid from the one of the first purifying system or the second purifying system substantially during the other predetermined supply period and the other dynamically adjusted oxygen delivery phase.

16. The method of claim 15, further comprising transmitting, from the other of the second purifying system or the first purifying system, at least a portion of a remaining amount of the substantially oxygen-rich fluid to the one of the first purifying system or the second purifying system after the other dynamically adjusted oxygen delivery phase.

17. The method of claim 8 wherein separating the fluid includes substantially adsorbing the oxygen-depleted fluid from the supply fluid.

18. The method of claim 8, further comprising substantially filtering particulate matter from at least one of the supply fluid or the substantially oxygen-rich fluid before delivering the output.

19. The method of claim 12 wherein adjusting the dynamically adjusted patient oxygen delivery phase is based upon each of the output target flow rate, the output flow rate, and the breathing rate.