Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1998-09-25
2000-08-08
Weiss, John G.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820328, 12820514, 12820517, A61M 1600
Patent
active
060986212
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a disposable oxygenating device.
BACKGROUND OF THE INVENTION
In the post operative treatment of patients, it is usually desirable to supply oxygen or oxygen enriched air to a patient for a period of say 5 to 15 minutes to assist in reoxygenating the patient to offset the effects of the anaesthetic. Usually oxygen is available in recovery rooms from suppliers which are capable of delivering oxygen at a rate of about 4 to 6 liters per minute. Unfortunately this is less than the rate of inspiration of a typical adult patient. Some attempts have been made to provide an oxygen storage device which can store oxygen from a relatively low capacity supply so as to be able to deliver the oxygen or oxygen enriched air to the patient at a relatively high rate during inspiration.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a disposable oxygenating device which is capable of delivering oxygen or oxygen rich air to a patient at relatively high flow rates.
According to the present invention there is provided a disposable oxygenating device comprising a body and a collapsible bag coupled thereto, the body including at least first, second and third openings, the first opening being couplable to a source of oxygen, the second opening being couplable to an endotracheal tube or a laryngeal mask or the like, and the third opening being in fluid communication with the interior of the bag. The arrangement is such that in use oxygen enters the body through the first opening and fills the bag so that during the inspiration cycle of the patient, oxygen stored in the bag can be rapidly delivered through the second opening to the endotracheal tube or the laryngeal mask.
The invention also provides a disposable oxygenating device comprising a body and a collapsible bag coupled thereto, the body including first coupling means being couplable to a source of oxygen, second coupling means being couplable to an endotracheal tube, laryngeal mask or the like, a connector to which the bag is connected, an oxygen duct in fluid communication with the first coupling means having an outlet orifice which in use delivers oxygen from the source of oxygen to inflate the bag with oxygen, and an outlet, the arrangement being such that, in use, during an inspiration cycle, oxygen from the bag passes through the second coupling means and, during an expiration cycle, expiration products pass through the body and are expelled through said outlet.
The invention also provides a method of oxygenating a patient having an endotracheal tube or laryngeal mask applied to him or her using a disposable oxygenating device having an inflatable bag comprising coupling the device to the endotracheal tube or laryngeal mask continuously supplying oxygen to the bag thereby inflating the bag with oxygen, permitting the bag to collapse during an inspiration cycle of the patient whereby oxygen from the bag is delivered to the patient through the endotracheal tube or laryngeal mask, and providing an outlet in the device whereby during an expiration cycle products of expiration are permitted to escape the device.
It is preferred that the bag is formed from a film of plastics material. Preferably the material comprises high density polyethylene.
Preferably the film is about 15 microns in thickness.
The bag may have a vent hole near an end thereof remote from the body.
Preferably the bag has a capacity in the range 250 to 500 ml.
Preferably further, the body is injection moulded from plastics material and the bag is adhered, bonded or welded thereto.
It will be appreciated that the device can be constructed of low cost materials so that it is cheap enough for disposal after a single use. This thereby avoids the need for sterilisation and/or autoclaving.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be further described with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a first embodiment of a disposable oxygenating device constructed in accordance with the
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Weiss John G.
Weiss Joseph F.
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