US 6,152,132 AGranted

Inspiratory tube for a ventilator

AssigneeSiemens Elema AB

InventorGeorgios Psaros

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Abstract

An inspiratory tube intended to serve as at least part of an inspiratory line in a ventilator, has a tube wall, a distal end, a proximal end, a gas flow channel for carrying a flow of breathing gas and an opening in the wall at a specific distance from one end of the inspiratory tube, this opening being adapted for connection to an expiratory device (40). The inspiratory tube has a constriction in the gas flow channel between distal end of the inspiratory tube and the opening, a first channel that proceeds within the tube wall, generally parallel to the gas flow channel, and which opens into the gas flow channel between the distal end of the inspiratory tube and the constriction, and a second channel that proceeds within the wall, generally parallel to the gas flow channel, which opens into the gas flow channel between the constriction and the opening. The channels can be connected to a pressure gauge for determining the rate of flow and pressure of gas flowing in the gas flow channel.

Claims7

Dependent claims

A breathing tube for use in a breathing-assist system, said tracheal tube comprising:

a tube wall having an interior surface and an exterior surface, said interior surface defining a gas flow channel with a distal end and a proximal end for carrying a flow of breathing gas therein;
said tube wall having an opening therein, proceeding through said tube wall from said interior surface to said exterior surface, at a distance from said distal end;
an expiratory valve disposed in said opening and communicating with ambient air;
said gas flow channel having a constriction therein between said distal end and said opening;
a first channel proceeding within said tube wall substantially parallel to said gas flow channel and opening into said gas flow channel between said distal end and said constriction;
a second channel proceeding within said tube wall substantially parallel to said gas flow channel and opening into said gas flow channel between said constriction and said opening;
and
said first and second channels being adapted for connection to a pressure gauge for determining at least one of flow and pressure of said breathing gas.

5 more elements

Dependencies are inferred from the claim text.