US 4,232,666 AGranted

Medical breathing apparatus

AssigneeD G T S.r.l.

InventorsAulo Savelli, Francesco Grianti, Giovanni Arcozzi, Leonardo Di Bari

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Abstract

A breathing apparatus having a pair of inspiration manifolds in series disposed with interposition of flow regulating means. A pressure stabilizer and governor is disposed upstream of the pair of inspiration manifolds. The pressure stabilizer employs a constant volume reservoir connected to a source of fluid under pressure and contains a variable volume chamber connected to the first inspiration manifold. A detector is provided for detecting the volume changes of the variable volume member and controlling flow in the inspiration circuit. An expiration circuit is directly connected to the atmosphere with interposition of flow regulating and intercepting means. Provision is made for coupling the expiration circuit to a source of vacuum.

Claims6

Dependent claims

A rate of flow controlled automatic medical breathing apparatus comprising:

means for supplying a respiratory gas mixture including first conduit means wherein said mixture flows;
valve means in said first conduit means for controlling the flow of said respiratory gas mixture into the apparatus;
a first inspiration manifold downstream of said valve means;
a pressure stabilizer and governor means interposed in said first conduit means between said valve means and said first inspiration manifold;
second conduit means downstream of said first inspiration manifold, comprising at least two parallel conduits and having first flow regulating means in each of said parallel conduits;
a second inspiration manifold downstream of said first inspiration manifold, wherein said parallel conduits of said second conduit means are joined;
inspiration means connectable to a patient and including an inspiration conduit connected to said second inspiration manifold;
expiration means connectable to a patient and including an expiration conduit;
and
second flow regulating means in said expiration conduit;
controlling means for controlling said first and second flow regulating means in said second conduit means and said expiration conduit so as to change the inspiration flow and expiration flow for a respiration cycle according to necessities imposed by the various pathological conditions of a patient;
and wherein said pressure stabilizer and governor means further comprises:
a constant volume reservoir;
supply means for supplying a fluid at a preselected pressure into said constant volume reservoir;
a variable volume member inside said reservoir, the interior of said variable volume member being isolated from said constant volume reservoir and connected to said first conduit means downstream of said valve means;
and
detecting and control means for detecting the volume of said variable volume member and controlling said valve means to prevent flow therethrough when a predetermined increased volume is detected and permit flow therethrough when a predetermined decreased volume is detected.

14 more elements

A rate of flow controlled automatic medical breathing apparatus comprising;

means for supplying a respiratory gas mixture including first conduit means wherein said mixture flows;
valve means in said first conduit means for controlling the flow of said respiratory gas mixture into the apparatus;
a first inspiration manifold downstream of said valve means;
a pressure stabilizer and governor means interposed in said first conduit means between said valve means and said first inspiration manifold;
second conduit means downstream of said first inspiration manifold, comprising at least two parallel conduits and having first flow regulating means in each of said parallel conduits;
a second inspiration manifold downstream of said first inspiration manifold, wherein said parallel conduits of said second conduit means are joined;
inspiration means connectable to a patient and including an inspiration conduit connected to said second inspiration manifold;
expiration means connectable to a patient and including an expiration conduit;
and second flow regulating means in said expiration conduit;
controlling means for controlling said first and second flow regulating means in said second conduit means and said expiration conduit so as to change the inspiration flow and expiration flow for a respiration cycle according to necessities imposed by the various pathological conditions of a patient;
and wherein said first flow regulating means in said parallel conduits and said second flow regulating means in said expiration conduit further comprise a plurality of valves responsive to said controlling means, each of said plurality of valves comprising;
a resilient pipe connected in said respective conduits having a gauged throttle member therein;
and
relatively movable members responsive to said controlling means for squeezing said resilient pipe.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/020,718Filed 15 Mar 1979
Priority: IT 21273 A/7816 Mar 1978
Granted: 11 Nov 1980
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

A61M 16/0009
Accessories therefor, e.g. sensors, vibrators, negative pressure: with sub-atmospheric pressure, e.g. during expiration
A61M 16/0051
Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators ; Tracheal tubes: with alarm devices
A61M 16/021
Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators ; Tracheal tubes: operated by electrical means
A61M 16/204
Proportional: used for inhalation control