Apparatus for delivery of humidified gases therapy, associated methods and analysis tools

• US 7,086,399 B2
• Filed: 05/28/2003
• Issued: 08/08/2006
• Est. Priority Date: 05/29/2002
• Status: Active Grant

• Current Assignee: Fisher & Paykel Healthcare Limited
• Original Assignee: Fisher & Paykel Healthcare Limited
• Inventors: Makinson, Ian Douglas, Young, Alex, Bond, David Alan
• Primary Examiner(s): Bennett, Henry
• Assistant Examiner(s): Lopez, Amadeus
• Application Number:
  US10/446,594
• Publication Number:
  US 20040016430A1
• Time in Patent Office: 1,168 Days
• Field of Search: 128/201.13, 128/203.12, 128/203.16, 128/203.17, 128/203.26, 128/203.27, 128/203.29, 128/204.14, 128/204.17, 128/204.18, 128/206.21, 128/206.28, 128/207.11, 128/920, 128/923, 128/204.22, 128/204.23, 128/200.11, 128/200.14, 128/204.21, 239/338, 261/DIG.65, 261/129, 261/154, 122/4.A, 122/4.R, 122/5.5 A, 122/7.B, 122/13.01, 122 133- 192, 122/33, 122/487, 122/DIG.7, 422123-124
• US Class Current: 128/204.21
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 16/10 Preparation of respiratory gases or vapours
• CPC Class Codes: A61M 16/1075 by influencing the temperature A61M16/1045 takes precedence
• CPC Class Codes: A61M 16/109 the humidifying liquid or the beneficial agent
• CPC Class Codes: A61M 16/1095 in the connecting tubes
• CPC Class Codes: A61M 16/16 Devices to humidify the respiration air A61M16/1045 takes precedence
• CPC Class Codes: A61M 2016/0039 in the inspiratory circuit
• CPC Class Codes: A61M 2205/3368 Temperature

Abstract

Apparatus for delivery of humidified gases therapy includes a humidifier. A recorder records. An output interface allows for outputting of the recorded data. The recorder may also record data indicative of patient compliance with the humidified gases therapy. The apparatus may determine patient compliance from sensed delivered flow.

Recorded humidity and compliance data retrieved from the apparatus are useful in methods for improving the efficacy of humidified gases therapy or diagnosing problems with the efficacy of humidified gases therapy.

Claims

1. Apparatus for delivery of humidified gases therapy, said apparatus including:

a humidifier, said humidifier having a humidity setting selector, operable by said patent to set and adjust a desired humidity level;

a blower, said blower having a range of operating speeds, and delivering a substantially constant pressure across a wide flow range, for an unvaried operating speed,

a flow sensor providing an output indicative of flow delivered by said apparatus,

means for producing user compliance data, calculated from said output of said flow sensor and said operating speed of said blower,

data recording means, said data recording means recording humidity data and said user compliance data, said humidity data indicative of the humidity of gases delivered by the apparatus, and

an output interface means for outputting said recorded user compliance data and humidity data.

2. An apparatus for delivery of humidified gases therapy as claimed in claim 1 wherein said humidity data is derived from said humidity setting.

3. An apparatus for delivery of humidified gases as claimed in claim 2 wherein said user compliance data is determined by comparing said output from said flow sensor to an upper flow limit and a lower flow limit appropriate for the operating speed at that time and recording the total time during the operating cycle of said apparatus when said output is within said upper flow limit and said lower flow limit.

4. An apparatus for delivery of humidified gases as claimed in claim 3 wherein said output indicative of flow delivered is recorded as an average flow over a set time period.

5. An apparatus for delivery of humidified gases as claimed in claim 4 wherein a compliance counter in said data recording means is incremented if said average flow is between said upper and lower limits over said time period.

6. An apparatus for delivery of humidified gases therapy as claimed in claim 1 wherein said humidity data is derived from a humidity sensor.

7. An apparatus for delivery of humidified gases as claimed in claim 6 wherein said user compliance data is determined by comparing said output from said flow sensor to an upper flow limit and a lower flow limit appropriate for the operating speed at that time, and recording the total time during the operating cycle of said apparatus when said output is within said upper flow limit and said lower flow limit.

8. An apparatus for delivery of humidified gases as claimed in claim 7 wherein said output indicative of flow delivered is recorded as an average flow over a set time period.

9. An apparatus for delivery of humidified gases as claimed in claim 8 wherein a compliance counter in said data recording means is incremented if said average flow is between said upper and lower limits over said time period.

10. An apparatus for delivery of humidified gases as claimed in claim 1 wherein said user compliance data is determined by comparing said output from said flow sensor to an upper flow limit and a lower flow limit appropriate for the operating speed at that time, and recording the total time during the operating cycle of said apparatus when said output is within said upper flow limit and said lower flow limit.

11. An apparatus for delivery of humidified gases as claimed in claim 10 wherein said output indicative of flow delivered is recorded as an average flow over a set time period.

12. An apparatus for delivery of humidified gases as claimed in claim 11 wherein a compliance counter in said data recording means is incremented if said average flow is between said upper and lower limits over said time period.