Disposable anesthesia-breathing circuit unit

Claim 2

In an anesthesia gas delivery system for providing an anesthetic gas to a patient including a face mask, first and second conduit means, connector means to connect said first and second conduit means to said face mask, said first conduit means receiving fluid exhaled from the patient, first check valve means connected to said first conduit means to prevent a reverse flow of the exhaled fluid in said first conduit means, a breathing bag associated with said first check valve mean, relief valve means in fluid communication with said first check valve means, exhalation check valve means in fluid communication with said relief valve means, absorber means receiving the exhaled fluid, fluid inlet means for adding fluid to the exhaled fluid, anesthetic vaporizer means receiving the exhaled fluid and adapted to provide fluid for inhalation, said anesthetic vaporizer communicating with said second conduit means, and a filter means removing extraneous particles from fluid circulating in the system, the improvement wherein the face mask, connector means, first and second conduit means and the filter means are disposable and readily detachable from said first check valve means and said vaporizer means after use.

Claim 3

An anesthesia gas delivery system as defined in claim 1 wherein said face mask has a first element comprising a relatively thin molded plastic face piece having: an edge surface; a first integral surface extending outwardly from said edge surface on one side of and toward the center of said face piece; a second integral surface extending from said one side and toward the center of said face piece from said first surface; a nose-accommodating portion extending from said second surface on said one side and having an opening formed thereinbelow said nose-accommodating portion; and a second element comprising a foamed plastic compressible cushion secured to and extending from the other side of said face piece to engage the surface of the face surrounding the nose and mouth.

Claim 4

An anesthesia gas delivery system as defined in claim 2 wherein said cushion is coated with a conductive material.

Claim 5

An anesthesia gas delivery system as defined in claim 2 wherein said cushion has a relatively thick bottom secured to said other side of said face piece and tapers toward a thinner face-engaging surface.

Claim 6

An anesthesia gas delivery system as defined in claim 2 wherein said face mask is provided with integrally formed projections extending from said one side thereof to receive straps for holding said face mask to the face.

Claim 7

An anesthesia gas delivery system as defined in claim 1 wherein said first conduit means has one end connection for coupling to the first check valve means and a flexible tube extending from said one end connection; said second conduit means has one end connection for coupling to the anesthetic vaporizer means and a flexible tube extending from its said one end connection; and said connector means comprises a coupler having first and second opEnings connected to the free ends of said flexible tubes of said first and second conduit means, respectively, and a third opening connected to said face mask.

Claim 8

An anesthesia gas delivery system as defined in claim 6 wherein said coupler comprises: a cross tube having end openings and an opening intermediate its ends; an integral tube extending from said tube having access to said intermediate opening, said intermediate tube connected to said face mask; and a connector tube swiveled on each end of said cross tube around said end openings providing the connections to said free ends of said flexible tubes of said first and second conduit means.

Claim 9

An anesthesia gas delivery system as defined in claim 7 wherein said filter means is connected to said flexible tube of said first conduit means to constitute its said one end connection.

Claim 10

An anesthesia gas delivery system as defined in claim 7 wherein said filter means is provided on said coupler.

Claim 11

An anesthesia gas delivery system as defined in claim 7 wherein said filter means is connected to said flexible tube of said second conduit means.

Claim 12

An anesthesia gas delivery circuit as defined in claim 1 wherein said breathing bag is readily detachable from association with said first check valve means and is disposable.

Claim 13

An anesthesia gas delivery circuit as defined in claim 11 wherein said breathing bag comprises a plurality of panels joined along their edges and made of antistatic material and at least one panel including a conductive portion.

Claim 14

An anesthesia gas delivery circuit as defined in claim 11 wherein said breathing bag comprises a plurality of panels joined along their edges made of an antistatic material.

Claim 15

An anesthesia gas delivery circuit as defined in claim 11 wherein said breathing bag comprising four panels joined along their edges.

Claim 16

An anesthesia gas delivery circuit as defined in claim 12 wherein said breathing bag includes a neck and a bushing joined to said neck.

Claim 17

In an anesthesia gas delivery system for providing an anesthetic gas to a patient including a gas communication means adapted to be placed in contact with a patient, connector means in gas flow relation to said communication means and having a pair of connector elements, first and second conduits each having one end in gas flow relation to a respective one of said pair of connector elements, said first conduit receiving fluid exhaled from the patient, first check valve means connected to said first conduit to prevent a reverse flow of exhaled fluid in said first conduit, a breathing bag associated with said first check valve means, relief valve means in gas flow relation to said first check valve means, exhalation check valve means in gas flow relation to said relief valve means, absorber means in gas flow relation to said relief valve means, fluid inlet means for adding an additional fluid to the gas flow, anesthetic vaporizer means in gas flow relation to said absorber means, said anesthetic vaporizer being connected to said second conduit to provide fluid for inhalation to the patient, and a filter means removing extraneous particles from the gas flow through the system, the improvement wherein the gas communication means, connector means, first and second conduits and the filter means are disposable and readily detachable from said first check valve means and said anesthetic vaporizer means.

Claim 18

In an anesthesia gas delivery system for providing an anesthetic gas to a patient including a gas communication means adapted to be placed in contact with a patient, connector means in gas flow relation to said communication means and having a pair of connector elements, first and second conduits each having one end in gas flow relation to a respective one of said pair of connector elements, said first conduit receiving fluid exhaled from the patient, first check valve means connected to said first conduit to prevent a reverse flow of exhaled fluid in said first conduit, a breathing bag associated with said first check valve means, relief valve means in gas flow relation to said first check valve means, exhalation check valve means in gas flow relation to said relief valve means, absorber means in gas flow relation to said relief valve means, fluid inlet means for adding an additional fluid to the gas flow, anesthetic vaporizer means in gas flow relation to said absorber means, said anesthetic vaporizer being connected to said second conduit to provide fluid for inhalation to the patient, and a filter means removing extraneous particles from the gas flow through the system, the improvement wherein the gas communication means, connector means, first and second conduits and the filter means are disposable and readily detachable from said first check valve means and said anesthetic vaporizer means.

Claim 19

The system set forth in claim 16 wherein said communication means is a face mask and said mask comprises a conductive plastic face piece and a foam plastic cushion adapted to resiliently conform to the facial contour of the patient and having a gas supply tube attachment means and wherein the cushion has a conductive coating.

Claim 20

The system set forth in claim 16 wherein said connector means has a Y configuration and comprises a hollow tee element having a leg and a head with the leg of said tee element connecting to said communication means, and said connector elements are rotatably fitted on opposite ends of the head and wherein said connector means is made of electrically conductive plastic material.

Claim 21

The system set forth in claim 16 wherein said first and second conduits are corrugated tubes made of electrically conductive material.