Apparatus for delivering humidified gases

• US 20070079826A1
• Filed: 09/17/2003
• Published: 04/12/2007
• Est. Priority Date: 09/17/2002
• Status: Abandoned Application

• Current Assignee: Fisher & Paykel Healthcare Limited
• Original Assignee: Fisher & Paykel Healthcare Limited
• Inventors: Dickinson, Philip, Makinson, Ian, Kramer, Martin, Biggs, Philip
• Application Number:
  US10/526,698
• Publication Number:
  US 20070079826A1
• Time in Patent Office: Days
• US Class Current: 128/200.140
• CPC Class Codes: A61M 16/0066 Blowers or centrifugal pumps
• CPC Class Codes: A61M 16/109 the humidifying liquid or the beneficial agent
• CPC Class Codes: A61M 16/16 Devices to humidify the respiration air A61M16/1045 takes precedence

Abstract

An apparatus for delivering humidified gases has a connection manifold (8) adapted to connect with inlet (5) and outlet (6) ports of a slide-on water chamber (2) in a single slide on motion. Connection of the gases inlet (5) and gases outlet (6) ports as well as any additional electrical and/or pneumatic connections are all made in the same slide on motion. The water chamber (2) may include inwardly extending elongate extension tubes (30,31) and at least one of the extension tubes may also have an air bleed aperture (33) to aid filling of the chamber (2).

Claims

1. An apparatus for use in humidified gases delivery treatment comprising:

a housing,

a pressurised gases supply within said housing,

a pressurised gases outlet in said housing in fluid connection with said pressurised gases supply and adapted to make fluid connection with an inlet of a heatable water chamber in order to provide gases flow to said chamber,

a humidified gases return in said housing, adapted to make fluid connection with an outlet of said chamber in order to receive humidified gases from said chamber,

a chamber heating means connected to said housing and, said housing includes a humidifier engagement locating said chamber adjacent said chamber heating means, said chamber heating means adapted to vaporise liquid water in said water chamber in order to provide water vapour to said gases flow passing through said water chamber,

a patient outlet in said housing, in fluid connection with said humidified gases return in order to receive humidified gases from said humidified gases return and provide humidified gases to said patient outlet, said patient outlet being in fluid connection with or adapted to make fluid connection with a breathing conduit for delivery of humidified gases to a patient, and wherein

said humidification chamber has a base, and said chamber is engagable with said humidifier engagement via a single motion, and said single motion of engagement urges the base of said humidification chamber adjacent and in contact with said chamber heating means and makes a first fluid connection between said pressurised gases outlet and said humidifier inlet, and makes a second fluid connection between said humidified gases return and said humidifier outlet, with said first and second fluid connections being made in the direction of said single motion.

2. An apparatus for use in humidified gases delivery treatment as claimed in claim 1, wherein said pressurised gases outlet and said inlet of a said humidifier have between them first complementary male and female connectors, having a preferred insertion direction for completing a fluid connection by engagement of the male and female connectors,

said humidified gases return and said outlet of said humidifier have between them second complementary male and female connectors, having a preferred insertion direction for completing a fluid connection by engagement of the male and female connectors, said preferred insertion direction of said first connectors being the same as said preferred insertion direction of said second connectors, and being the same as at least the direction of a terminal part of said single motion.

3. An apparatus for use in humidified gases delivery treatment as claimed in claim 2 wherein said inlet of said humidifier and said outlet of said humidifier are each a female port,

and said pressurised gases outlet and said humidified gases return are each a resilient tubular projection fitting within respective female ports with said chamber engaged.

4. An apparatus for use in humidified gases delivery treatment as claimed in claim 3 wherein said protruding tubes of said pressurised gases outlet and humidified gases return have substantially parallel axis of extension, said chamber heating means includes a substantially planar heating plate, and said axis of extension of said tubes are at least substantially parallel with the plane of said heating plate.

5. An apparatus for use in humidified gases delivery treatment as claimed in any one of claims 1-4 wherein said patient outlet includes a connector for receiving a breathing hose and at least one auxiliary electrical connection plug or socket or pneumatic connection plug or prot, for a simultaneous connection when connecting a breathing circuit having complementary electrical or pneumatic connectors.

6. A humidifier chamber for use with a gases humidification apparatus comprising:

a container, with a surrounding wall and top, and an open bottom,

a heat conductive base enclosing said open bottom of said container,

a gases inlet to said container,

a gases outlet to said container,

a first elongate flow tube extending into said humidifier container from the inner periphery of said gases inlet, with an opening at a distal end of said flow tube being spaced from said wall of said chamber,

a second elongate flow tube extending into said humidifier container from the inner periphery of said gases outlet, with an opening at a distal and of said flow tube being spaced from said wall of said chamber,

said first and second flow tubes being substantially parallel to each other, and substantially parallel to said base of said chamber, and

said gases inlet and said gases outlet facing the same direction, a preferred insertion direction, and

said preferred insertion direction is substantially parallel to the said base of said chamber, such that

said humidifier chamber may make operable engagement with a heater base in a single motion,

and fluid connection with said gases outlet and said gases inlet, being also made in said single motion.

7. A humidifier chamber as claimed in claim 6, wherein said opening of said first flow tube faces a direction transverse to an axis of said first flow tube, and said opening of said second flow tube faces a direction transverse to an axis of said second flow tube.

8. A humidifier chamber as claimed in claim 7, wherein said transverse direction is not downwards.

9. A humidifier chamber as claimed in claim 7, wherein said transverse direct is upwards.

10. A humidifier chamber as claimed in claim 6, wherein said chamber further includes a baffle between said first flow tube and said second flow tube.

11. A humidifier chamber as claimed in claim 10, wherein said baffle extends from the roof of said chamber and terminates below the surface of water in said chamber when said chamber is filled to a maximum intended water level for use.

12. A humidifier chamber as claimed in claim 6, wherein said second tube includes an air bleed orifice, said air bleed orifice being located in the top of said second elongate flow tube, and located toward the end of the elongate flow tube adjacent said gases outlet.

13. A humidifier chamber as claimed in any one of claims 6 to 12, wherein said gases inlet and said gases outlet of said humidifier chamber are each a female port, and

said humidifier chamber is generally cylindrical, and said female ports open out to the cylindrical surface adjacent the top of the cylindrical wall.

14. (canceled)

15. (canceled)