Abstract: A connector (36) is employed in a patient interface (2) that provides a flow of breathable gas to an airway of a patient. The connector includes a support apparatus (48) and a connection apparatus (50). The support apparatus is connected with a source of a breathable gas (4). The connection apparatus is disposed on the support apparatus and is engaged with the cushion. The connection apparatus includes an engagement element (78) and a retention apparatus (80). The engagement element has a frusto-conic engagement surface (84) that is structured to receive against it at least a portion of the cushion. The retention apparatus includes at least a first retention element (86) engaged with the cushion and retaining the at least portion of the cushion in a condition received against the engagement surface.

Abstract: A portable unit for providing automated delivery of medication to a ventilator circuit that runs between a mechanical ventilator and a patient is provided. The portable unit includes: a housing configured to releasably hold an inhaler containing the medication, wherein the inhaler is in fluid communication with the ventilator circuit; an actuator at least partially in the housing and in communication with the inhaler to deliver medication from the inhaler to the ventilator circuit for a respective patient; a controller programmed to control an amount and/or frequency of medication delivery from the inhaler to the ventilator circuit for a respective patient, the controller configured to actuate the actuator to deliver the medication from the inhaler to the ventilator circuit at the programmed amount and/or frequency; and a display for displaying the amount and/or frequency of medication delivery and an amount of medication remaining in the inhaler, wherein the display is dynamically updated by the controller.

Abstract: The processing of gas mixtures, in particular, of respiration gases for ventilated patients. The processing according to the invention relates, in particular, to the use of selective gas separation membranes for the retention of noble gases in the exhaled air of ventilated patients. The gas separation membrane is an active separator which is integrated in a ventilator. The separation membrane separates the noble gases from the remainder of the residual of the exhaled air by selectively retaining the noble gases. Thus, it is possible to provide a ventilator which enables the application of noble gases, in particular xenon, as an anesthetic preferably with low loss and as simple as possible.

Abstract: In a small animal imaging system (10) at least one modality (12) and a docking station (36) are provided. The docking station (36) provides a workspace (47) and docking ports (48) for preparation and holding of anesthetized animals that are awaiting imaging. For the duplication of positions, a subject mold (26) is provided that holds the subject in a reproducible position on a subject bed (16). Vital signs monitoring is also provided for subjects awaiting scans. The bed (16) includes fiducials (28) to aid in registration of like modality images and different modality images. A capsule (14) can encapsulate a single bed (16), or for tandem imaging, the capsule can encapsulate multiple-bed configurations, such as two, three, or four beds (16). For better positioning and ease of user access, a positioner (34) positions the capsule (14) from the rear of the modality (12).

Abstract: A surgical mask for administering and/or scavenging medical gases includes a nasal mask and an oral mask that envelops the nasal mask. The nasal mask is secured to the oral mask and may be removable from it.

Abstract: In an apparatus for collection of waste anesthetic gases, and a method of using such an apparatus, the apparatus has a gas collection chamber with an input port to be connected to an exhaust of an anesthesia delivery system for receiving a first gas flow therefrom that contains a waste anesthetic gas component. An output port from the gas collection chamber is connected to a vacuum system for evacuation of an evacuation gas flow from the gas collection chamber. A bidirectional port leads to and from the gas collection chamber, which has an adsorbing unit connecting the gas collection chamber with an ambient environment surrounding the gas collection chamber. The apparatus provides for safe prevention of discharge of exhaled anesthetic gases into an ambient atmosphere surrounding the apparatus.

Abstract: A vacuum demand valve for controlling flow of exhalation gases from a patient to a vacuum line. The demand valve comprises: a housing having a housing inlet that allows exhalation gases to flow into the housing from a patient, and a housing outlet that allows gases to flow from the housing into the vacuum line; a diaphragm having a flexible skirt and a rigid portion moveable in response to gas pressure in the housing; a sealing member connected to the rigid portion to engage the housing outlet to resist the flow of gases from the housing to the vacuum line. In a first condition, the vacuum line pressure causes the sealing member to engage the housing outlet and in a second condition a predetermined pressure of exhalation gases in the housing causes the sealing member to disengage from the housing outlet.

Abstract: A surgical mask for administering and/or scavenging medical gases includes a nasal mask and an oral mask that envelops the nasal mask. The nasal mask is secured to the oral mask and may be removable from it.

Abstract: A device for adsorbing and desorbing anesthetic shall be improved in respect of the anesthetic supply. A sampling device (16) for removing a gas volume of the breathing gas and an anesthetic dispenser (18) are connected to the breathing gas line (8) between the adsorption filter (9) and the patient (10) in such a way that the gas volume removed and the gas volume supplied are compensated.

Abstract: A surgical mask for administering and/or scavenging medical gases includes a nasal mask and an oral mask that envelops the nasal mask. The nasal mask is secured to the oral mask and may be removable from it.

Abstract: The present invention provides a gas absorbing system which comprises: an inlet pipe, a gas accommodating section into which gas enters through the inlet pipe, and a negative pressure exhausting pipe which exhausts the gas in the gas accommodating section to external device by using negative pressure wherein the gas accommodating section comprises a first chamber which is provided with air holes in the side wall for discharging the gas in the gas accommodating section or allowing external air entering the gas accommodating section. The gas absorbing system according to the present invention not only can effectively prevent the system internal gas from discharging directly to environment to endanger the health of patients and medical care personnel, but also can reduce the variation of the pressure inside the system when an abnormal incident occurs, so as to prevent it from influencing the safety of the patient to the most extent.

Abstract: A process and a device are provided for separating carbon dioxide from a breathing gas mixture by means of a “Fixed Site Carrier” membrane. The breathing gas mixture is guided in the device on a side of a selective, semipermeable membrane, which is provided with amine groups, which are bound covalently to a polymer. Through the membrane, the transport of the components of the gas mixture can take place. The membrane is selected to be such that the permeability for CO2 is substantially higher than the permeability for the other gas components of the breathing gas mixture. The membrane has or is associated with means for guiding the gas, which acts to guide the gas mixture on one side along the membrane. The membrane separates volume areas in which different CO2 partial pressures prevail from one another.

Abstract: An anaesthesia apparatus has a control unit that controls a gas flow of a flushing gas through at least part of the anaesthesia apparatus so as to flush anaesthetic agent from the apparatus when the apparatus is not connected to a patient. In this way the remaining anaesthetic agent can be removed from the anaesthesia apparatus after use before connecting another patient. Pre-use check of the apparatus can be performed automatically.

Abstract: A heat exchange module comprising a number of substantially parallel and spaced apart heat exchange elements is provided. One or more surfaces of the heat exchange elements may be coated with a dessicant. The module can be manufactured so that first and second surfaces of the module are curved. The module may be used as part of a face mask or other garment that positions the module within the respiratory air stream of a user. The module may be inserted in a mesh sleeve provided as part of the garment. The module may also be used as part of other forms of clothing that protect the face and in protective helmets, or as part of outdoor or survival equipment.

Abstract: The present invention provides a gas absorbing system which comprises: an inlet pipe, a gas accommodating section into which gas enters through the inlet pipe, and a negative pressure exhausting pipe which exhausts the gas in the gas accommodating section to external device by using negative pressure wherein the gas accommodating section comprises a first chamber which is provided with air holes in the side wall for discharging the gas in the gas accommodating section or allowing external air entering the gas accommodating section. The gas absorbing system according to the present invention not only can effectively prevent the system internal gas from discharging directly to environment to endanger the health of patients and medical care personnel, but also can reduce the variation of the pressure inside the system when an abnormal incident occurs, so as to prevent it from influencing the safety of the patient to the most extent.

Abstract: Xe exhaled from a patient is recovered with a polymeric membrane.

Abstract: Method and device for scavenging tainted escape gas at a location proximate the patient's mouth (24) before that gas diffuses into, or otherwise reaches the personal breathing space (32, 35) of attending health care providers (38, 39). The scavenging device (50) includes, but is not limited to a suction arrangement (52) suspendable from a patient's nasal mask (40) used for administering gaseous analgesia or anesthetic such as nitrous oxide to the patient (20). A suction inlet (54) is positionable proximate the patient's mouth (24) and an exhaust outlet (56) is provided that is interconnectable with a vacuum source (46).

Abstract: An anesthetic gas scavenging system is provided. The system includes a housing having one or more apertures placed proximate to a patient's mouth and a vacuum source interconnected with the housing for excavating anesthesia exhaled by the patient. The housing can take the form of a circular tube and can be positioned to rest about a patient's neck. The housing can have closed ends attachable together about a patient's neck. Alternatively, the housing can take on other desired shapes, and can be suspended on a strap about a patient's neck to rest on the patient's chest.

Abstract: A gas delivery, evacuation and respiratory monitoring system comprises a face mask having an inflow flapper valve and a fresh-gas inflow tube and an exhaust-gas outflow tube and a gas sampling tube, a fresh gas source and an exhaust-gas scavenging system, a fresh gas supply tube operative coupling the fresh gas source and the face mask, an exhaust-gas hose operatively coupling the scavenging system and exhaust-gas outflow tube, a carbon-dioxide monitoring device, also known as a capnograph and a carbon-dioxide sampling tube operative coupling the capnograph and the mask.

Abstract: A device for exchanging gas volumes in an anesthetic system has an inlet, an outlet, a first chamber arranged between the inlet and the outlet, a second chamber arranged between the inlet and the outlet, a switching valve for selective connection to the first chamber or the second chamber for forming a flow path between the inlet and the outlet, and a controller for controlling the switching valve.

Abstract: An improved respiratory suction apparatus—catheter includes a manifold for attachment to the distal hub of an endotracheal tube to form a respiration circuit, a catheter tube which is displaceable through the manifold and into the endotracheal tube to suction secretions from the tube and lungs, and a valve mechanism disposed adjacent the respiration circuit to minimize the draw of air from the respiration circuit of a patient while the catheter is being cleaned. In a preferred embodiment of the invention, the catheter is cleaned more thoroughly than in the prior art while simultaneously drawing little or no air from the patient's respiration circuit.

Abstract: Breathing equipment with a circuit for breathing gas and with a flat calcium hydroxide absorber (1) is cooled by an evaporating agent with improved cooling. A gas volume flow of at least 60 L per minute is admitted to the outer surface (14) of the calcium hydroxide absorber (1) receiving the evaporating agent by at least one gas delivery device (5). The evaporating agent is delivered to the outer surface (14) of the calcium hydroxide absorber (1) by an admitted pressure from an evaporating agent reservoir (10) via at least one connection line (12).

Abstract: An improved exhalation evacuator (15) having a mask (16) with an inhalation portion (18) and an exhalation portion (19), a delivery conduit (20) communicating with the mask, a return conduit (21) communicating with the mask, the delivery conduit having a supply end (22) and an inlet end (23), the inlet end having an inlet gas passageway (24) and a first connect port (25), the return conduit having an outlet end (26) and an exhaust end (28), the outlet end having an exhaust gas passageway (29) and a second connect port (30), the gas passageway of the delivery conduit communicating with the inhalation portion, the gas passageway of the return conduit communicating with the exhalation portion, the first connect port engaging the exhalation portion, the second connect port engaging the inhalation portion, the first and second connect ports not having a passageway allowing gas to move between the mask and the delivery and return conduits, respectively, the gas inlet passageway and first connect port having an inve

Abstract: An absorber arrangement for an anesthesia apparatus has a docking unit and a cassette unit, removably connected to the docking unit, the docking unit having a valve that shuts off flow paths in the absorber arrangement when the cassette unit is detached from the docking unit. Increased functionality with fewer components is made possible by the valve being formed by a shunt valve adapted to by-pass the flow paths in the absorber arrangement dependent on the position of the cassette unit in the docking unit and the cassette unit is freely positionable between a first position and a second position, the bypass being 100% for the cassette unit in the first position and 0% for the cassette unit in the second position.

Abstract: A process and system are provided for controlling a respirator with a breathing circuit (2), an inspiration branch (10) and an expiration branch (12), in which the gas components needed for the respiration are fed in by a fresh gas metering device (20) via a fresh gas line (9), as a result of which at least the amount of breathing gas consumed can be replenished. A breathing gas delivery unit (1) is provided in the inspiration branch (10) and with a volume flow sensor (13) in the expiration branch (12). The fresh gas utilization of the respirator is improved and the process and system reduces the resistances in the breathing circuit (2) for the patient (3) by the breathing gas delivery unit (1) being returned during the phase of expiration at a speed that depends on the volume flow that is measured by the volume flow sensor (13).

Abstract: An occluder for supporting and preventing escape of anesthesia gases through face masks when not in use includes a C-shaped support base. The base consists of a flat base plate adapted to fit beneath a surgical mattress, a side plate located in a plane normal to that of the base plate which has a height equal to the thickness of a standard surgical mattress, and a top plate which is in a plane parallel to that of the base plate. A solid cylindrical support shaft is integral with and extends upwardly from the top plate. Preferably the cylindrical support shaft has a main body portion approximately 15 mm in diameter and a top portion of reduced diameter which is preferably 13 mm in diameter. The components of the occluder are preferably formed of a non-ferrous metal such as aluminum.

Abstract: A vacuum system for medical tables, primarily comprises a universal arm, attached inhaler masks and a vacuum source. This equipment primarily places the inhaler masks at the sides of patient's mouth. Then, through the vacuum source, the mist surrounding the patient's mouth and the dirty air breathed out by the patient will be inhaled and clean air is released after filtering.

Abstract: A combined nasal anaesthesia breathing mask and oral scavenging hood is provided herein. Such combination includes a nasal anaesthesia breathing mask with inlet means to the nasal anaesthesia mask for connection to a conventional anaesthesia breathing circuit. An oral scavenging hood is operatively associated with or is physically associatable with respect to, the nasal anaesthesia breathing mask for placement over only the mouth of the patient undergoing inhaled sedation. An inlet means is provided to the oral scavenging hood for connection to a conventional scavenging circuit. The inventive concept is that there is no gaseous communication between the nasal anaesthesia breathing mask and the oral scavenging hood. In this way, inhalation of anaesthesia gas can take place simultaneously with the scavenging of exhaled gases.

Abstract: An improved respiratory suction apparatus catheter includes a manifold for attachment to the distal hub of an endotracheal tube to form a ventilation circuit, a catheter tube which is displaceable through the manifold and into the endotracheal tube to suction secretions from the tube and lungs, and a valve mechanism disposed adjacent the ventilation circuit to minimize the draw of air from the ventilation circuit of a patient while the catheter is being cleaned. In a preferred embodiment of the invention, the catheter is cleaned more thoroughly than in the prior art while simultaneously drawing little or no air from the patient's ventilation circuit.

Abstract: A quantitative electroencephalograph (QEEG) based method and system for automatically controlling anesthesia is called a Closed Loop Anesthesia Controller (CLAC). An anesthetic is administered until the patient has attained the desired plane of anesthesia and a QEEG self-norm is then obtained. If the patient's brain waves exceed a confidence interval, centered at the set-point of the self-norm, the administration of the anesthesia is automatically adjusted.

Abstract: A therapeutic gas delivery device includes a monitor having an inlet and an outlet, a source of therapeutic gas in fluid communication with the monitor inlet, and a gas delivery tube in fluid communication with the monitor outlet. The monitor includes a control valve having a normally open port, a normally closed port, and a common port. The common port is connected to the monitor outlet over a gas line and the normally open port and normally closed port are connected to the monitor inlet and atmosphere. The valve is switchable between a first position wherein the therapeutic gas passes through the monitor and a second position wherein atmospheric air or gas passes through the monitor. A flow sensor is placed in the gas line to measure the flow of gas through the second line and produces a signal indicative of the flow of gas through the gas line. A sensor by-pass tube extends around the flow sensor to allow a predetermined portion of the gas to by-pass the flow sensor.

Abstract: A waste anesthesia capture system includes exhaust apparatus having a rate of fluid flow of at least five times the rate of anesthesia gas delivered to a patient, the exhaust apparatus having a capacity of at least ten cubic feet per minute. The system further includes an exhaust conduit in fluid-integral communication, at a first opening, with the exhaust apparatus. Also included is a Y-shaped anesthesia gas conduct formed of a flexible memory-retaining material. A cross-section of a base portion of that conduit has an output in fluid-integral communication with a second opening of the exhaust conduit, and each of two branches of the Y-shaped conduit define longitudinal axes, the axes having a selectable separation in the range of nine inches to two feet, and each open end of the branches defining a diameter in the range of 0.5 to 4.0 inches.

Abstract: An apparatus and method for preventing contamination of the Post Anesthesia Care Unit of A Hospital by the use of a mask sealed to the patient's face and connected by a ventilator circuit to an airator that pulls a vacuum to exhaust the patient's expirations to the outside atmosphere. The disclosure also includes a "oxyvent" which is a tube adapted to be attached to an oxygen tank and to a patient to provide a higher oxygen ratio to the patient and to provide forced ventilation to a patient who has difficulty ventilating.

Abstract: Contaminated air in general anaesthesia is extracted via a hemispherical hood 1 located closely over the patient. The hood 1, which is of a thin-wall transparent-shell form, is mounted for hand-touch variation of its orientation on an arm 2 which is carried by a telescopic column 3 that allows for height adjustment. The arm 2 extends from a unit 18 that allows the hood 1 to be swung horizontally about the column 3, and gas is drawn from the hood 1 near its open mouth 6 via a low-down port 7 (FIGS. 3 to 5) that is coupled through the arm 2 and column 3 to a fan unit 4. Relief 23 of the bottom margin of the hood 1 may be used to enhance access to the patient, and for maneuverability the column 3 is trolley-mounted or adjustable laterally on a fixed track 35 (FIGS. 9 and 10).

Abstract: Improved nebulizers and aerosol inhalation devices including these nebulizers are provided by this invention. The disclosed nebulizers are suitable for supplying an aerosol mist to a patient and include a liquid inlet for receiving a liquid, a gas inlet for receiving a pressurized gas and an aerosol outlet for providing an aerosol mist. An important aspect of this invention is the addition of gas swirling means or flow controlling means for creating a swirling action or a tangential velocity to the gas forming the aerosol. The nebulizer and other devices of this invention can produce an aerosol mist having an obscuration of at least 10% and a median droplet size of less than 1 .mu.m.

Abstract: Improved aerosol inhalation devices including a nebulizer and a rain-off chamber for returning droplets of liquid medication or diagnostics exhaled by the patient back to the nebulizer for reatomization.

Abstract: An improved filtration device suitable for reducing exhaled particles in an aerosol inhalation device. The filtration device includes a body portion having an interior chamber which communicates with an inlet and outlet opening through the chamber wall. Within the chamber is a substance recovery media designed to capture a portion of the exhaled particles from the patient and for assisting in returning a portion of the captured particles back to the patient, such as by a nebulizer. The filtration device further includes a filter layer located within the interior chamber for filtering out contaminants, such as viruses and bacteria, in the gaseous medium prior to releasing the remaining portion of the gaseous medium into the environment. Aerosol inhalation devices containing such filters are also provided by this invention.

Abstract: An anesthesia circuit stand is able to support an anesthesia circuit fitting, when not attached to a patient or to a patient airway securement device in such a manner that anesthesia vapor and nitrous oxide is prevented from escaping into the environment of an operating room. The stand includes a base portion to which is connected a stalk element. The stalk can be substantially in the form of a cone having a proximal end with a greater diameter than a distal end. Alternatively, the stalk can be in the shape of a generally cylindrical rod. A distal end of the stalk includes a plug portion which has a diameter sufficient to engage the inner diameter of an outlet orifice of an anesthesia circuit elbow in a frictional fit.

Abstract: An anesthesia machine includes a breathing system for delivering a gas mixture, including an anesthetic gas, to a patient for inhalation and for collecting exhaled gas from the patient. A cannister flow communicates with the breathing system and removes carbon dioxide from the exhaled gas. A pressure relief valve includes a housing that defines a chamber in flow communication with the breathing system, a valve member for regulating a flow of gas from the breathing system into the chamber and venting gas into the chamber when pressure in the breathing system exceeds a pressure threshold setting, and a plunger for preventing the flow of gas into the chamber independent of the pressure in the breathing system without changing the pressure threshold setting. The cannister, pressure relief valve, and other components are secured to a manifold having internal flow channels.

Abstract: The invention is directed to an anesthesia arrangement having a pump device for returning preselected gaseous components from an expiration line 2 of the anesthesia apparatus 1 into a first pressure vessel 17. The anesthesia arrangement is so improved that the rinsing losses are minimized and the anesthetic agent is available at constant concentration. The arrangement includes a second pressure vessel 19 connected downstream of the first pressure vessel 17 and a compressor 18 for pumping the gaseous components from the first pressure vessel into the second pressure vessel. The compressor 18 and a cooling unit 20 adjust the operating parameters of pressure and temperature so that at least the anesthetic agent is present in the liquid phase in the second pressure vessel.

Abstract: A downdraft system is used for withdrawing and collecting medical gases, fumes, mists and particulates from the vicinity of a patient's face. Two intakes are located on respective sides of the patient's face, at the cheeks. The intakes extend from temple to chin. They are connected through a ducting system to a source of vacuum for collecting the medical gases. The ducting system is configured to allow the adjustment of the intake positions. The intakes create a flow of air across the patient's face from above the nose to below the mouth so that gases leaking during administration of gases or exhaled by the patient, and fumes, mists or low velocity particulates generated, for example, in orthodontic procedures are captured in the flow across the patient's face into the intakes.

Abstract: An anesthesia waste gas evacuation system having a waste gas collection chamber with an inlet into the chamber at the bottom and a blower at the top for blowing gas from the chamber to an outlet connected to a building ventilation system. Vents are provided to provide communication between the chamber interior and the surrounding atmosphere so that the pressure within the chamber remains substantially at atmospheric pressure avoiding the formation of a sub-ambient pressure within the chamber. The chamber is electrically grounded and is electrically connected to a standpost so as to ground the post as well.

Abstract: A face mask includes a cup-shaped body for enclosing an external respiratory organ, such as the nose, of a patient. Flow of a respirable gas into the body and exhaust of expired gas from the body are unidirectional controlled by respiration check valves. A plurality of detachably securable and interchangeable accessory devices adapt the mask for use with selected prior art scavenging devices.

Abstract: An anesthesia scavenging hood is adapted to fit over the head of a surgical patient and to prevent the contamination of operating rooms with waste anesthetic vapor and nitrous oxide gas. The hood enables placement of an endotracheal tube or other breathing or anesthesia circuit into the patient's airway. The hood may be sealed about the endotracheal tube and about the patient. The hood also includes a port having disposed therein a suction tube which communicates waste vapor and gas out of the hood and outside of the operating room with the aid of a vacuum source.

Abstract: A system for collecting and removing leaking anesthesia or analgesia gas from an anesthesia apparatus in an operation theater or the like includes a vacuum source (1) and an anesthesia mask (5) adapted to be placed onto the face of a patient and connected to the anesthesia apparatus by at least one supply and removing device, through which the patient is supplied with a mixture of anesthesia or analgesia gas and air and through which air-gas mixture exhaled by the patient is removed, and a vacuum line (4) connected to the anesthesia mask for removing leaking gas to the vacuum source. A T-shaped joint (10) is connected in the vacuum line (4) and has one opening connected by a branch line (11)to the supply and removing device for removing exhaled gas-air mixture via the vacuum source. A noise damping or reducing device (18) is arranged in the vacuum line to reduce disturbing noise as far as possible.

Abstract: A surgical splatter shield is provided which is adapted to be carried by a suction catheter for effecting the suction of blood from the area being operated on without the customary undesirable splatter of blood. The surgical splatter shield is preferably in the form of an elongated transparent plate which is transversely curved and which is attached to the customary suction catheter. The plate forming the surgical splatter shield has a sleeve permanently or fixedly attached to the edge of a central aperture. The sleeve extends upwardly from the plate and receives a terminal end of the suction catheter in press-fit or snug engagement.

Abstract: An apparatus for removing introduced or exhaled from the mouth and nose area of a patient via a suction device is disclosed. The apparatus includes a first flexible and hollow cylinder having one closed end and one open end and a plurality of small openings grouped together in a central portion of the first cylinder. The open end is attachable to the suction device. The second flexible and hollow cylinder is attachable to the operating table for supporting the first cylinder. A flexible tube extends through the second cylinder to provide rigidity and malleability to the second cylinder. The first cylinder is coupled to the second cylinder.

Abstract: A cartridge loosely containing powdered activated charcoal is connected to a conventional anesthetic administration system of the type commonly used in veterinary surgical facilities. The cartridge is readily supported by a conventional anesthetic cart and is usable in both rebreathing and pass-through operation of the anesthetic-administration system. Gases of vaporized anesthetic substances that typically are released from the pop-off valve of liquid anesthetic containers or in the exhalations from the animal patient are both selectively directed through the activated charcoal without the need for motors, blowers, or other devices requiring power. The invention utilizes commonly available materials such as PVC pipe and end fittings, powdered activated charcoal and fiberglass filter elements, and assorted commercially available pipe fittings.

Abstract: The compact combination oral suction and scavenging apparatus can be operated simultaneously or separately for oral suctioning and expired anaesthetic gases scavenging of a patient under sedation. It includes a main shut off valve for turning the entire apparatus on or off, and a separate shut off valve which can be operated selectively to disable the scavenger portion of the apparatus. A safety relief valve prevents sub-atmospheric or excessively high pressures from building up in the apparatus to affect the normal breathing pattern of a patient. The expiratory valve of the scavenging assembly is housed in a disposable chamber having a disposable transparent snap-on dome shaped cover such that the expiratory valve can be readily monitored visually, and the cover can be easily and quickly removed for manual manipulation or adjustment of the expiratory valve by the anaesthetist.

Abstract: The present invention is directed to an anesthetic evacuation device for use in situations where the anesthetic gasses are exhausted into the room air. More specifically, the invention discloses a device which can be attached to the popoff valve of many of the current anesthesia machines. The device contains and exhausts the excess anesthesia gases to the outside air, preventing any danger to medical personnel who may be in the same room. The system also allows for the rapid exhaust of any leftover gasses following the medical procedure.