Environmental Support Systems, Inc.

Pioneer Medical Systems, Inc.

Barnum B Lambert

Ralph H Lewis

The present invention is an assisted breathing device which allows a rescuer or emergency care giver to administer mouth-to-mouth type resuscitation to a victim or patient on land or in the water, without the rescuer or emergency care giver having to come in direct contact with the victim or patient's lips, exhaled air or body fluids. The assisted breathing interface device comprises, in combination, a tubular conduit or housing, a slide valve, and a spring or tension loaded valve member on the slide valve. The tubular housing has two open end orifices, at least one defined side wall opening and a central air passageway for the flow of air from a first person (rescuer or emergency aid giver) to a second person (victim or patient) during inflation or inhalation, and from the second person to defined side wall opening(s), and then the atmosphere, during exhalation; a slide valve, with at least one air passageway therein; and a valve member positioned at the air passageway in the slide valve, to control the flow of air through the air passageway on the slide valve. In operation the flow of air through the central passageway in the assisted breathing device is controlled by the slide valve and its valve member positioned at the air passageway in the slide valve, which operates to either open the passageway in the slide valve or close it, so that air can be directed through the central passageway in the device and the passageway in the slide valve from the first person to the second person as needed, but exhaled air from the second person does not return through the passageway in the slide valve to the first person.

Resuscitator-snorkel for land or water use

A disposable CO.sub.2 absorber for applications in rebreathing systems uses a flexible bag-like pouch to contain CO.sub.2 absorbent granules. The pouch includes an intake port having a one-way valve at the top of the pouch and an outlet or exhaust port including a perforated cylindrical tube or perforated disk in the bottom of the pouch. Exhaled gas containing CO.sub.2 passes through the one-way valve at the intake port and contacts the absorbent granules where a chemical reaction bonds the CO.sub.2 with the granules. The residual gas, substantially free of CO.sub.2, passes out of the pouch through the exhaust ports for rebreathing by the user. The flexure of the pouch increases the efficiency with which the CO.sub.2 is absorbed.

Disposable carbon dioxide absorber

A disposable rebreathing canister is disclosed for administering oxygen and anesthesia to patients. The canister essentially comprises a housing for a scrubber, including a manifold plate and a rigid container, and a flexible liner disposed within the rigid container. The liner forms an imperforate barrier between the interior of the rigid container and the manifold plate. A scrubber disposed between the manifold plate and liner chemically reacts with gases conducted to it through one of a pair of coaxial passages formed in the manifold plate. Reacted gases are then moved through a tortuous passage either back to the other one of the coaxial passages or removed through an exhaust port. The interior of the rigid container connects with a source of pressure that allows the flexible liner to be collapsed, thus forcing treated gases, fresh oxygen and anesthesia into the lungs of the patient.

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San Jose, CA, United States of America

Barnum B Lambert