HUMIDIFICATION APPARATUS HAVING RFID TAG SENSOR AT PATIENT END OF GAS PATHWAY

• US 20110088693A1
• Filed: 01/23/2008
• Published: 04/21/2011
• Est. Priority Date: 01/23/2007
• Status: Active Grant

• Current Assignee: Fisher & Paykel Healthcare Limited
• Original Assignee: Fisher & Paykel Healthcare Limited
• Inventors: Alami, Nordyn, Cheung, Dexer Chi Lun, Somervell, Andrew Robert Donald, Quill, Christopher Simon James
• Granted Patent: US 10,124,141 B2
• Time in Patent Office: Days
• US Class Current: 128/203.14
• CPC Class Codes: A61M 16/0069 the speed thereof being controlled by respiratory parameters, e.g. by inhalation
• CPC Class Codes: A61M 16/06 Respiratory or anaesthetic masks
• CPC Class Codes: A61M 16/0683 Holding devices therefor
• CPC Class Codes: A61M 16/0875 Connecting tubes
• 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 16/161 with means for measuring the humidity
• CPC Class Codes: A61M 2016/0027 pressure meter
• CPC Class Codes: A61M 2016/0033 electrical
• CPC Class Codes: A61M 2016/1025 the O2 concentration
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/276 preventing unwanted use
• CPC Class Codes: A61M 2205/3368 Temperature
• CPC Class Codes: A61M 2205/3569 sublocal, e.g. between console and disposable
• CPC Class Codes: A61M 2205/3592 using telemetric means, e.g. radio or optical transmission
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2205/6018 providing set-up signals for the apparatus configuration
• CPC Class Codes: A61M 2205/6054 : Magnetic identification systems
• CPC Class Codes: A61M 2210/0618 : Nose

Abstract

A breathing circuit for delivering heated, humidified gases to a patient for medical purposes is described, comprising a humidifier chamber holding a quantity of water, a blower unit that delivers a pressurised gases stream to the chamber inlet, and a control system that adjusts output parameters of the breathing circuit, the circuit including a heater plate which heats the water in the chamber so that gases flowing through the chamber become heated and humidified, the circuit also including a gases transportation pathway and patient interface to convey heated humidified gases to a patient, the gases transportation pathway including an RFID tag located at the patient end which senses a parameter of the gases passing through the pathway, the control system including an RFID interrogator interrogating and receiving data relating to the sensed parameter from the RFID tag in real time, and adjusting the output parameters of the breathing circuit accordingly.

Claims

1. A breathing circuit for the delivery of heated, humidified gases to a patient for medical purposes, comprising:

a humidifier chamber adapted to hold a quantity of water and having an inlet and an outlet to allow gases to flow through said humidifier chamber,

a blower unit adapted to in use deliver a stream of pressurised gases to the inlet of said humidifier chamber,

a control system configured to adjust one or more output parameters of said breathing circuit,

a heater plate which in use is located adjacent to said humidifier chamber and which is adapted to heat said quantity of water in said humidifier chamber so that said gases flowing through said chamber become heated and humidified,

a gases transportation pathway connected to said outlet of said humidifier chamber to convey said gases flow to said patient, said gases transportation pathway having a patient interface adapted to supply said patient with said gases flow, said gases transportation pathway having an RFID tag located at or close to the patient end of said gases transportation pathway, said RFID tag adapted to sense a parameter of said gases passing through said gases transportation pathway, said control system having an RFID interrogator adapted to interrogate and receive data from at least one RFID tag in real time, said RFID interrogator receiving data relating to said sensed parameter, said control system adjusting the output parameters of said breathing circuit according to said received data.

7. A breathing circuit as claimed in claim 1 wherein said output parameters adjusted by said control system are any combination of;

fan speed, heater plate power output, breathing conduit heater wire power output.

8. A breathing circuit as claimed in claim 7 wherein said gases transportation pathway is a breathing conduit with an integral heater wire, said heater wire dual-configured to provide heat to the inside surface of said breathing conduit, and also to act as an aerial for said RFID tag.

9. A breathing circuit as claimed in claim 8 wherein said RFID tag is also configured to act as a patient interface identifier.

10. A breathing circuit as claimed in claim 9 wherein said patient interface is one of a nasal cannula, a nasal mask, a full face mask, a trachostomy fitting.

11. A breathing circuit as claimed in claim 10 wherein said control system has a number of pre-set identification profiles, said RFID interrogator interrogating said RFID tag and identifying which type of said patient interface is connected to said blower unit, said control system automatically adjusting the initial value of said output parameters depending on said identified component.

12. A breathing circuit as claimed in claim 11 wherein at least one RFID tag in each component of said breathing circuit contains data relating to an expiry date for that component, said control system in use interrogating said RFID tag and comparing the present date to said expiry date and initiating an alarm condition if said expiry date has passed.

13. A breathing circuit as claimed in any one of claims 1 and 7-12 wherein said RFID tag is of the semi-passive or active type, and said integral heater wire is configured to provide power to said RFID tag.

14. A breathing circuit as claimed in any one of claims 1 and 7-12 wherein said RFID tag is of the semi-passive or active type, and has an integral power supply.

15. A breathing circuit as claimed in claim 13 wherein said blower unit also has user-operable control adapted to allow a user to set output parameters of said 30 breathing circuit.

16. A breathing circuit as claimed in claim 15 wherein said user-set output parameters are one or both of gases temperature and gases humidity.

30. A breathing circuit as claimed in claim 14 wherein said blower unit also has user-operable control adapted to allow a user to set output parameters of said breathing circuit.

31. A breathing circuit as claimed in claim 30 wherein said user-set output parameters are one or both of gases temperature and gases humidity.

52. A breathing circuit as claimed in claim 1. wherein said RFID tag is configured to act as a gases temperature sensor and is positioned in said patient interface to sense the temperature of gases passing through said patient interface.

53. A breathing circuit as claimed in claim 1 wherein said RFID tag is configured to act as a gases pressure sensor and is positioned in said patient interface sense the pressure of gases passing through said patient interface.

54. A breathing circuit as claimed in claim 1 wherein said RFID tag is configured to act as a gases flow sensor and is positioned in said patient interface to measure the flow rate of gases passing through said patient interface.

55. A breathing circuit as claimed in claim 1 wherein said RFID tag is positioned in said interface is configured to measure the oxygen content of gases passing through said patient interface.

56. A breathing circuit as claimed in claim 1 wherein said RFID tag is positioned in said patient interface and is configured to measure the humidity of gases passing through said patient interface.

2-6. -6. (canceled)

17-29. -29. (canceled)

32-51. -51. (canceled)

57-59. -59. (canceled)