Sensing and communications system for use with oxygen delivery apparatus

• US 5,706,801 A
• Filed: 07/28/1995
• Issued: 01/13/1998
• Est. Priority Date: 07/28/1995
• Status: Expired due to Fees

• Current Assignee: Cooltel, Inc. (Chart Industries Incorporated)
• Original Assignee: Caire Incorporated (Niterra Co., Ltd.)
• Inventors: Remes, Scott, Heyl, Larry, Middleton, Dick
• Primary Examiner(s): Millin, Vincent
• Assistant Examiner(s): Deane, Jr., William J.
• Application Number:
  US08/508,980
• Time in Patent Office: 900 Days
• Field of Search: 128/200.24, 128/202.12, 128/202.22, 128/202.26, 128/204.18, 128/204.21, 128/204.22, 128/204.23, 128/204.25, 128/204.29 , 128/205.11, 128/205.12, 128/205.23, 128/205.27, 128/716, 128/719
• US Class Current: 128/202.26
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/021 operated by electrical means A61M16/202 – A61M16/205 take precedence
• CPC Class Codes: A61M 16/0672 Nasal cannula assemblies for oxygen therapy
• CPC Class Codes: A61M 16/101 using an oxygen concentrator
• CPC Class Codes: A61M 2202/0007 introduced into the body
• CPC Class Codes: A61M 2202/0208 Oxygen
• CPC Class Codes: A61M 2202/03 Gases in liquid phase, e.g. cryogenic liquids
• CPC Class Codes: A61M 2205/3389 Continuous level detection A61M2205/3393 takes precedence
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient

Abstract

An oxygen delivery apparatus is used to supply oxygen-enriched air to a patient via a diffuser. A communication module containing an in-line flowmeter and oxygen concentration sensor is provided to measure the flow rate and oxygen concentration of the oxygen-enriched supplied to the patient. The length of a therapy session is also measured. The measured information is stored and periodically transmitted via a communication module including an internal modem to a remote computer system. The remote computer system includes a program that manipulates and stores the data transmitted from the module. Analysis of the data reveals the operational status of the oxygen delivery apparatus and whether the patient is complying with a prescribed regimen of use. The communication modules for a number of users in a given geographic can be monitored for efficient servicing.

Claims

1. A sensing and communications system for use with an oxygen delivery apparatus which delivers oxygen-enriched air to a patient to permit remote compliance monitoring of said oxygen delivery apparatus, comprising:

a) means for measuring a session length during which said oxygen-enriched air is continuously supplied to said patient and measuring data related to the delivered flow rate of oxygen-enriched air from said oxygen delivery apparatus at one or more times during the measured session;

b) means for transmitting said measured delivered flow rate data and session length data to a remote location; and

c) means, at said remote location, for storing information specifying a prescribed regimen of use for said patient including session length and delivered flow rate information, for receiving the transmitted data and comparing it to the prescribed session length and delivered flow rate information to determine patient and oxygen delivery apparatus compliance with the prescribed regimen of use.

2. The sensing and communications system of claim 1 wherein said measuring means includes a restricted orifice in circuit with said delivery apparatus and a sensor for generating a signal which is related to said flow rate by measuring the pressure drop across said orifice.

3. The sensing and communications system of claim 1 wherein said measuring means includes a conduit in circuit with said delivery apparatus and a sensor positioned therein for generating a signal which is related to said flow rate by measuring the temperature of said sensor.

4. The sensing and communications system of claim 1 wherein said measuring means includes clock means for measuring said session length.

5. The sensing and communications system of claim 4 wherein said flow rate and said session length data are periodically transmitted to said remote means, such data being stored in a memory prior to transmission.

6. The sensing and communications system of claim 5 wherein said measuring means further includes means for measuring data related to the oxygen concentration of said oxygen-enriched air supplied to said patient at one or more times during the measured session, such oxygen concentration data being stored in said memory and periodically transmitted to said remote means.

7. The sensing and communications system of claim 1 wherein said remote means includes means for displaying a comparison of said prescribed regimen with the transmitted data to provide an indication of whether the patient and oxygen delivery apparatus are complying with said prescribed regimen.

8. The sensing and communications system of claim 1 wherein said remote means includes a memory for storing the transmitted data for multiple sessions and means for determining whether said oxygen delivery apparatus is trending toward failure based on a comparison of current data with stored data.

9. The sensing and communications system of claim 1 wherein said oxygen delivery apparatus is a liquid delivery system.

10. The sensing and communications system of claim 1 wherein said oxygen delivery apparatus is an oxygen concentrator.

11. The sensing and communications system of claim 1 further comprising means for determining whether said oxygen delivery apparatus is in a failure condition and for generating a failure notice which is transmitted to said remote means.

12. A sensing and communications system for use with an oxygen delivery apparatus which delivers oxygen-enriched air to a patient to permit remote compliance monitoring of said oxygen delivery apparatus, comprising:

a) means for measuring data related to the oxygen concentration and delivered flow rate of oxygen-enriched air continuously supplied to said patient during use of said oxygen delivery apparatus;

b) means for periodically transmitting said oxygen concentration and delivered flow rate data to a remote location; and

c) means, at said remote location, for receiving, storing and analyzing said periodically transmitted data to determine the current operational status of said oxygen delivery apparatus and for predicting whether said apparatus is trending toward failure based on a comparison of currently transmitted data with stored transmitted data.

13. The sensing and communications system of claim 12 wherein said measuring means includes a memory in which said delivered flow rate and oxygen concentration data are stored, said stored data being periodically transmitted to said remote means.

14. The sensing and communications system of claim 13 further including processor means for measuring a time to acceptable concentration (TAC), said TAC value being periodically stored in said memory and transmitted to said remote means.

15. The sensing and communications system of claim 13 wherein said means for measuring includes processor means for periodically determining high, low and average flow rates and oxygen concentrations of said oxygen-enriched air supplied to said patient, such data being stored in said memory and periodically transmitted to said remote means.

16. The sensing and communications system of claim 12 wherein said measuring means includes a restricted orifice in circuit with said delivery apparatus and a sensor for generating a signal which is related to said flow rate by measuring the pressure drop across said orifice.

17. The sensing and communications system of claim 12 wherein said measuring means includes a conduit in circuit with said delivering apparatus and a sensor positioned therein for generating a signal which is related to said flow rate by measuring the temperature of said sensor.

18. The sensing and communications system of claim 12 further comprising means for determining whether said oxygen delivery apparatus is in a failure condition and for generating a failure notice which is transmitted to said remote means.

19. The sensing and communications system of claim 12 wherein said oxygen delivery apparatus is an oxygen concentrator.

20. A sensing and communications system for use with a plurality of oxygen delivery apparatus each of which delivers oxygen-enriched air to a patient, comprising:

a) a plurality of sensing and communications modules for use with said home oxygen delivery apparatus, each of said modules including;

i) means for measuring a session length during which oxygen-enriched air is continuously supplied to said patient and measuring data related to the delivered flow rate and oxygen concentration of oxygen-enriched air from said oxygen delivery apparatus at one or more times during the session, and

ii) means for periodically transmitting said flow rate, oxygen concentration and session length data to a remote location; and

b) means, at said remote location, for storing for each oxygen delivery apparatus, patient information specifying a prescribed regimen of use including session length, delivered flow rate and oxygen concentration information, for receiving and storing the transmitted data and for;

i) comparing the transmitted flow rate and session length data to prescribed flow rate and session length data to determine patient compliance with a prescribed regimen of use, and

ii) analyzing said periodically transmitted flow rate and oxygen concentration data to determine both the current operational status of said oxygen delivery apparatus and for predicting whether said apparatus is trending toward failure based on a comparison of currently transmitted data with stored transmitted data.

21. A sensing and communications system for use with an oxygen delivery apparatus that delivers oxygen-enriched air to a patient to permit remote compliance monitoring of said oxygen delivery apparatus, comprising:

a) a clock for measuring a session length during which said oxygen-enriched air is continuously supplied to said patient and a flow sensor for measuring data related to the delivered flow rate of oxygen-enriched air from said oxygen delivery apparatus at one or more times during the session;

b) a transmitter for sending said delivered flow rate data and measured session length to a remote location; and

c) a data processor at said remote location for storing information specifying a prescribed regimen of use for said patient including session length and flow rate information, for receiving the sensed flow rate data and measured session length and comparing it to the prescribed session length and flow rate information to determine patient and oxygen delivery apparatus compliance with the prescribed regimen of use.

22. The sensing and communications system of claim 21 wherein said flow sensor includes a restricted orifice in circuit with said delivery apparatus and a pressure sensitive device for generating a signal which is related to said flow rate by measuring the pressure drop across said orifice.

23. The sensing and communications system of claim 21 wherein said flow sensor includes a conduit in circuit with said delivery apparatus and a temperature sensitive device positioned therein for generating a signal which is related to said flow rate by measuring the temperature of oxygen-enriched air in the conduit.

24. The sensing and communications system of claim 21 wherein said clock includes a microprocessor clock means for measuring said session length.

25. The sensing and communications system of claim 24 wherein said flow rate and said session length data are periodically transmitted to said remote means, such data being stored in a memory prior to transmission.

26. The sensing and communications system of claim 25 further comprising an oxygen sensor for measuring data related to the oxygen concentration of said oxygen-enriched air supplied to said patient, such oxygen concentration data being stored in said memory and periodically transmitted to said remote means.

27. The sensing and communications system of claim 21 wherein said remote data processor includes means for displaying a comparison of said prescribed regimen with the transmitted data to provide an indication of whether the patient is complying with said prescribed regimen.

28. The sensing and communications system of claim 21 wherein said remote data processor includes a memory for storing the transmitted data and means for predicting whether said oxygen delivery apparatus is trending toward failure based on a comparison of current data with stored data.

29. The sensing and communications system of claim 21 wherein said oxygen delivery apparatus is a liquid delivery system.

30. The sensing and communications system of claim 21 wherein said oxygen delivery apparatus is an oxygen concentrator.

31. The sensing and communications system of claim 21 further comprising means for determining whether said oxygen delivery apparatus is in a failure condition and for generating a failure notice which is transmitted to said remote means.

32. A sensing and communications system for use with an oxygen delivery apparatus that delivers oxygen-enriched air to a patient to permit remote compliance monitoring of said oxygen delivery apparatus, comprising:

a) sensors for measuring data related to the delivered flow rate and oxygen concentration of oxygen-enriched air continuously supplied to said patient from said oxygen delivery apparatus;

b) a transmitter for periodically transmitting said delivered flow rate and oxygen concentration data to a remote location; and

c) a computer at said remote location, for receiving, storing and analyzing said periodically transmitted data to determine the current operational status of said home oxygen delivery apparatus and to predict whether said apparatus is trending toward failure based on a comparison of currently transmitted data with stored transmitted data.

33. The sensing and communications system of claim 32 further including a memory in which said delivered flow rate and oxygen concentration data are stored, said stored data being periodically transmitted to said remote computer.

34. The sensing and communications system of claim 33 further including a processor for measuring a time to acceptable concentration (TAC), said TAC value being periodically stored in said memory and transmitted to said remote computer.

35. The sensing and communications system of claim 33 further including a processor for periodically determining high, low and average flow rates and oxygen concentrations of said oxygen-enriched air supplied to said patient, such data being stored in said memory and periodically transmitted to said remote computer.

36. The sensing and communications system of claim 32 wherein said sensors include a restricted orifice in circuit with said delivery apparatus and a pressure sensitive device for generating a signal which is related to said flow rate by measuring the pressure drop across said orifice.

37. The sensing and communications system of claim 32 wherein said sensors include a conduit in circuit with said delivery apparatus and a temperature sensitive device positioned therein for generating a signal which is related to said flow rate by measuring the temperature of said sensor.

38. The sensing and communications system of claim 32 further comprising a processor for determining whether said oxygen delivery apparatus is in a failure condition and for generating a failure notice which is transmitted to said remote means.

39. The sensing and communications system of claim 32 wherein said oxygen delivery apparatus is an oxygen concentrator.

40. A method for remote compliance monitoring of use of an oxygen delivery apparatus that delivers oxygen-enriched air to a patient, comprising:

a) measuring a session length during which said oxygen-enriched air is continuously supplied to said patient;

b) sensing data related to the delivered flow rate of oxygen-enriched air from said oxygen delivery apparatus at one or more times during the measured session;

c) transmitting said sensed flow rate data and measured session length to a remote location;

d) storing at said remote location information specifying a prescribed regimen of use for said patient including session length and flow rate information; and

e) receiving at said remote location the sensed flow rate data and measured session length and comparing it to the prescribed session length and flow rate information to determine patient and oxygen delivery apparatus compliance with the prescribed regimen of use.

41. A method for remote compliance monitoring of use of an oxygen delivery apparatus that delivers oxygen-enriched air to a patient, comprising:

a) measuring data related to the delivered flow rate and oxygen concentration of oxygen-enriched air continuously supplied to said patient from said oxygen delivery apparatus;

b) periodically transmitting said delivered flow rate and oxygen concentration data to a remote location; and

c) receiving, storing and analyzing in a computer at said remote location said periodically transmitted data to determine both the current operational status of said oxygen delivery apparatus and for predicting whether said apparatus is trending toward failure based on a comparison of currently transmitted data with stored transmitted data.