US 8,997,741 B2Granted

Respiration system

AssigneeDräger Medical GmbH

InventorsRalf Heesch, Henryk Schnaars

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Abstract

A respiration system feeds an anesthetic gas having, a density ρgas, with a Y-piece for connection to a patient, with a respiration circuit having an inspiration branch and an expiration branch, which extend away from the Y-piece. A first supply line from a branch in the expiration branch leads to an anesthetic gas discharge valve and a second supply line from the branch leads to a reservoir. A too high pressure, opposing expiration, cannot build up in the expiration branch and losses of anesthetic gas are kept to a minimum. A prestressing device exerts a prestressing force onto the valve body of the anesthetic gas discharge valve against the effect of gravity. The mass mvalve and the prestressing force determine a threshold pressure in the anesthetic gas discharge line that results in an opening of the anesthetic gas discharge valve.

Claims20

Dependent claims

A respiration system for feeding an anesthetic gas having a density ρgas, the system comprising:

a Y-piece for connection to a patient;
a respiration circuit with an inspiration branch and an expiration branch, which extend away from the Y-piece;
a branching in the expiration branch;
an anesthetic gas discharge valve;
a first supply line connected from the branching and leading to the anesthetic gas discharge valve;
a reservoir;
a second supply line connected from the branching and leading to the reservoir, said second supply line having a cross-sectional area Asupply line 2 and a length lsupply line 2, wherein:
the anesthetic gas discharge valve comprises a valve body having a mass which is pressed, by means of the effect of gravity, towards the first supply line against a circular-ring-shaped valve seat having a diameter;
and
the anesthetic gas discharge valve includes a prestressing means for exerting a prestressing force onto the valve body against the effect of gravity, so that the mass and the prestressing force determine a threshold pressure about which the pressure in the first supply line has to lie at least above that on the side of the anesthetic gas discharge valve facing away from the first supply line to open the anesthetic gas discharge valve.

7 more elements

A respiration system for feeding an anesthetic gas having a density ρgas, the system comprising:

a Y-piece for connection to a patient;
a respiration circuit with an inspiration branch and an expiration branch, which extend away from the Y-piece;
a branching in the expiration branch;
a reservoir;
a reservoir line connected from the branching and leading to the reservoir, said second supply line having a cross-sectional area Asupply line 2 and a length lsupply line 2;
an anesthetic gas discharge line connected from the branching;
an anesthetic gas discharge valve connected to the anesthetic gas discharge line, the anesthetic gas discharge valve comprises a circular-ring-shaped valve seat having a dimension, a valve body having a mass which is pressed, by means of the effect of gravity toward the circular-ring-shaped valve seat, the valve body being acted on by fluid pressure in the anesthetic gas discharge line in a direction against the effect of gravity and being acted on by atmospheric pressure in a direction of the effect of gravity and a prestressing means for exerting a prestressing force onto the valve body against the effect of gravity, so that the mass and the prestressing force determine a threshold pressure of the fluid pressure in the anesthetic gas discharge line that results in an opening of the anesthetic gas discharge valve.

4 more elements

A respiration system for feeding an anesthetic gas having a density ρgas, the system comprising:

a Y-piece for connection to a patient;
a respiration circuit with an inspiration branch and an expiration branch, which extend away from the Y-piece;
a branching in the expiration branch;
a reservoir;
a reservoir line connected from the branching and leading to the reservoir, said second supply line having a cross-sectional area Asupply line 2 and a length lsupply line 2;
an anesthetic gas discharge line connected from the branching;
an anesthetic gas discharge valve connected to the anesthetic gas discharge line, said anesthetic gas discharge valve comprising a circular-ring-shaped valve seat having a dimension, a valve body having a mass which is pressed, by means of the effect of gravity toward the circular-ring-shaped valve seat, the valve body being acted on by fluid pressure in the anesthetic gas discharge line in a direction against the effect of gravity and being acted on by atmospheric pressure in a direction of the effect of gravity and a prestressing means for exerting a prestressing force onto the valve body against the effect of gravity, so that the mass and the prestressing force determine a threshold pressure of the fluid pressure in the anesthetic gas discharge line that results in an opening of the anesthetic gas discharge valve, said valve body having a valve body surface facing in the direction of the effect of gravity, said prestressing means engaging said valve body surface.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/359,821Filed 27 Jan 2012
Priority: EP 1117208830 Jun 2011
Published: US 2013/0025595 A131 Jan 2013
Granted: 7 Apr 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

A61M 16/0816
Bellows; Connecting tubes ; Water traps; Patient circuits: joints or connectors
A61M 16/0833
Joints or connectors: t- or Y-type connectors, e.g. Y-piece
A61M 16/0891
Circuit type: closed circuit, e.g. for anaesthesia
A61M 16/208
Valves specially adapted to medical respiratory devices: non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves