345 results about "Anesthetic gases" patented technology

An electronic anesthesia delivery apparatus for mixing a carrier gas and first and second anesthetic agents comprises a chassis having an electronic vaporizer, the vaporizer having a first anesthetic chamber and a second anesthetic chamber retaining the first anesthetic agent and the second anesthetic agent, a carrier gas input port in flow communication with the first anesthetic chamber and the second anesthetic chamber, a precision orifice and an electronic control valve corresponding to each of the chambers being downstream of the gas input port, each of the chambers having a conduit in flow communication with the carrier gas input port, each of the conduits extending into each of the chambers below an upper level of anesthetic agent, wherein the carrier gas passes through a porous diffuser near an end of the conduit and bubbles through the anesthetic agent, the chamber further comprising an anesthetic gas outlet port, an electronic touchscreen display for controlling carrier gas flow rate to the first anesthetic chamber and the second anesthetic chamber, the electronic touchscreen display further allowing control of concentrations of the anesthetic agent in an anesthesia to a patient by intermittently opening and closing of the electronic control valve, a circuit board having an input / output portion, the circuit board in electronic communication with the electronic touchscreen display, the input / output portion receiving temperature of the anesthetic agent, the electronic anesthesia delivery apparatus allowing use of a first anesthetic agent while a second anesthetic agent is one of either replaced or substituted in the second chamber.

The present invention relates to the field of medical devices used in the procedures of orotracheal or nasotracheal intubation. Oral or nasal endotracheal intubation procedures are commonly employed to secure a controlled airway and to deliver inhalant oxygen, anesthetic gases, and other therapeutic agents into the trachea and lungs of human and veterinary patients. Such intubation procedures carry a significant risk of dental injury resulting from contact between the laryngoscope blade used for visualization during intubation. The present invention provides an apparatus to reduce dental injury including a modified laryngoscope blade and a disposable insert which is designed to be received and retained in a single step by the modified laryngoscope blade. The disposable insert may be quickly secured by the user, and reduces both direct pressure and shear forces on the maxillary incisor teeth when the laryngoscope blade is placed in a patient's mouth during intubation.

The present invention prevents the leakage of anesthetic gas, and enables in vivo observation of a specimen such as small laboratory animals over a long period of time. An anesthetizing chamber comprises a chamber main body for housing a specimen such as a laboratory animal; an anesthetic gas supply part for supplying anesthetic gas to the chamber main body; and an anesthetic gas recovery part for recovering the anesthetic gas that is supplied into the chamber main body from the anesthetic gas supply part; wherein a transparent window is provided to at least the chamber main body.

The present invention relates to the field of medical devices used in the procedures of orotracheal or nasotracheal intubation. Oral or nasal endotracheal intubation procedures are commonly employed to secure a controlled airway and to deliver inhalant oxygen, anesthetic gases, and other therapeutic agents into the trachea and lungs of human and veterinary patients. Such intubation procedures carry a significant risk of dental injury resulting from contact between the laryngoscope blade used for visualization during intubation. The present invention provides an apparatus to reduce dental injury including a modified laryngoscope blade and a disposable insert which is designed to be received and retained in a single step by the modified laryngoscope blade. The disposable insert may be quickly secured by the user, and reduces both direct pressure and shear forces on the maxillary incisor teeth when the laryngoscope blade is placed in a patient's mouth during intubation.

To provide a catalyst obtained by loading at least one noble metal selected from the group consisting of rhodium, ruthenium and palladium on a support selected from silica and silica alumina, and a method for decomposing nitrous oxide using the catalyst thereof. The catalyst for decomposing nitrous oxide of the present invention cannot be easily affected by a volatile anesthetic contained in a waste anesthetic gas, can recover the activity by activation and regeneration even when deteriorated, and can reduce the amount of NOx generated to less than the allowable concentration.

A non-invasive method of treating cerebral ischemia, involving the use of non-inhaled, intra-nasally delivered carbon dioxide (CO2), alone or in combination with other gases to augment cerebral perfusion and improve outcome following a stroke is provided. A vasodilator gas is delivered intranasally, alone or in combination with a second gas, for prolonged periods of time without systemic absorption. The second gas may be selected from NO, hydrogen, xenon, anesthetic gases, oxygen, nitrogen, nitrous oxide, carbon monoxide, or air. The treatment selectively increases cerebral perfusion and provides neuroprotection in the treatment of cerebral ischemia.

An inhalation mask, an artificial nose unit, an anesthetic gas concentration detector, an extension tube, an anesthesia attachment, and an elastic bag are in communicative connection in sequence. The elastic bag has a mixing chamber formed therein and has an anesthetic inlet, an air inlet, and an outlet port each formed at the boundary to the exterior. The anesthesia attachment includes a hollow structure and an evaporation injector syringe. The outlet port of the elastic bag is in communicative connection with the hollow structure through its opening, and the evaporation injector syringe tightly mates with the interior of another opening. The anesthetic introduced into the mixing chamber is vaporized and then mixed with air introduced from the air inlet into mixed gas. The mixed gas is supplied from the outlet port to the inhalation mask by compressing the elastic bag or other procedures.

A method and apparatus are disclosed for recovering and separating anesthetic gas components from waste anesthetic gases to be purged from a healthcare facility. Prior to a condensation step, a compressor is used to increase the waste anesthetic gas pressure in order to facilitate condensation of anesthetic gas components at higher temperatures and in greater amounts than through condensation at lower pressures. Condensing the anesthetic gas components from the compressed waste anesthetic gas stream is then achieved using conventional condensation systems, which remove anesthetic gases as either liquid condensates or solid frosts. A preferred embodiment of the invention may be used with existing high-flow scavenging or reclamation systems but is more preferably used with low-flow scavenging or reclamation systems, which employ intelligent waste anesthetic gas collection units to minimize the ingress of atmospheric gas when no waste anesthetic gas is to be purged from the healthcare facility.

A method and system for the fractionation and removal of nitrous oxide and other volatile halocarbon gas components from waste anesthetic gases using liquid oxygen are disclosed. Liquid oxygen is warmed for use in a healthcare facility by cooling and condensing waste anesthetic gases. A cold trap / fractionator is provided wherein selective components of the waste anesthetic gas are collected as a frost on the coils of the cold trap / fractionator by desublimation / deposition and / or condensation / solidification. In a periodic batch process, the collected frost is first thawed and the melted liquids or gases are then collected at various increasing temperatures, thereby separating the nitrous oxide and other halocarbon gas components by their varying melting points. The thawed anesthetic components are collected in separate tanks based on their melting points. Warmed by the waste anesthetic gases in the cold trap / fractionator, the oxygen is supplied to the healthcare facility for its normal uses.

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.

A detector for monitoring the low levels of differential pressures and the rate of mass flow rate of gas (air, e.g.) in a duct. The sensor's temperature is maintained at a constant gradient above temperature of the flowing gas, typically 4-7° C. higher. The detector consists of two thermally decoupled sensors—one is the air temperature sensor and the other is a temperature sensor coupled to a heater. The sensors are connected to an electronic servo circuit that controls electric power supplied to the heater. The sensors are positioned outside of the air duct and coupled to the duct via a relatively thin sensing tube protruding inside the duct. The end of the tube has an opening facing downstream of the gas flow, thus being exposed to a static gas pressure. The detector can be employed in fuel burners of the HVAC systems, internal combustion engines, medical equipment to control flow of anesthetic gases, in the security systems to monitor minute changes in air pressure resulted from opening and closing of doors and windows in a protected facility.

The invention relates to an object stage of a multi-modal imaging system, which is characterized in that a lifting table and a slide device are arranged on a revolving stage of the lifting table; a slide block mechanism of a screw mandrel is arranged on the lifting table; the revolving stage is fixed on a slide block; the slide block mechanism of the screw mandrel drives the revolving stage to do up-and-down movement on the lifting table; the revolving stage comprises a mounting bracket; a driving gripper mechanism is arranged on the mounting bracket; the driving gripper mechanism comprises a hollow shaft driven by an electronic motor via a transmission mechanism; the upper end of the hollow shaft is communicated with an inhalator anesthesia apparatus via an anesthetic gas pipe; the lower end of the hollow shaft is provided with a gripper used for fixing a small animal; a driven gripper mechanism corresponding to the driving gripper mechanism is arranged on the mounting bracket; and the driving and the driven gripper mechanisms revolve synchronously. The object stage of the multi-modal imaging system can not only ensure that each detector in the multi-modal imaging system can acquire the full circular information of a tested object, but also keep the vital sign of the tested object in optimum conditions all the time, thus ensuring that the process of multi-modal imaging goes smoothly.

An anesthetic gas intermediate storage unit is provided having a first gas duct for passing through inspiration gas, a second gas duct for passing through expiration gas and an adsorption material (2), which can be influenced electrically, for an anesthetic, which is carried by a gas. The adsorption material is arranged in at least one gas duct for passing through breathing gas, and with a device for admitting expiration gas and inspiration gas alternatingly to the adsorption material (2), at least at an identical area for the intermediate storage of the anesthetic from the expiration gas to the inspiration gas. The device has openings, which divert the expiration gas and inspiration gas flowing in and out such that expiration gas and inspiration gas are admitted to the stationary adsorption material (2) alternatingly at an identical area.

A method and system for removal of nitrous oxide and volatile halocarbon gas components from waste anesthetic gases using a low-flow scavenging or reclamation system preferably including an intelligent waste anesthetic gas collection unit fluidly coupled between each individual anesthetic machine and the waste gas evacuation manifold. Through a system including a collection chamber, a pressure detector, and a exhaust valve which is actuated based on the detected pressure in the collection chamber, the waste anesthetic gas collection unit allows flow to the waste suction manifold only in the presence of waste gas and interrupts all flow into the suction manifold when no waste gas is present.

A detector for monitoring the low levels of differential pressures and the rate of mass flow rate of gas (air, e.g.) in a duct. The sensor's temperature is maintained at a constant gradient above temperature of the flowing gas, typically 4-7° C. higher. The detector consists of two thermally decoupled sensors—one is the air temperature sensor and the other is a temperature sensor coupled to a heater. The sensors are connected to an electronic servo circuit that controls electric power supplied to the heater. The sensors are positioned outside of the air duct and coupled to the duct via a relatively thin sensing tube protruding inside the duct. The end of the tube has an opening facing downstream of the gas flow, thus being exposed to a static gas pressure. The detector can be employed in fuel burners of the HVAC systems, internal combustion engines, medical equipment to control flow of anesthetic gases, in the security systems to monitor minute changes in air pressure resulted from opening and closing of doors and windows in a protected facility.

The invention discloses an anesthetic dosage calculation method and an anesthetic dosage calculation system for an anesthesia machine. The method includes steps: using a monitoring device to measure anesthetic gas concentration and mixed gas flow, and using a main controller to record measuring time; using the main controller to calculate gaseous anesthetic dosage Q according to the anesthetic gas concentration, the mixed gas flow and the measuring time; and using the monitoring device to identify anesthetic gas types, and using the main controller to calculate liquid anesthetic dosage Q corresponding to the gaseous anesthetic dosage Q according to a gas molar volume calculation method. Errors caused by manual calculation can be avoided, accuracy and precision of anesthetic dosage calculation results can be improved effectively, and basis is provided for patient safety guaranteeing, operation costing and medical insurance claim.

The invention discloses a mainstream type synchronous monitoring device and method for multiple kinds of breathing gas concentrations and breathing gas pressure. A light source is controlled to flicker, so that a four-channel infrared sensor outputs modulation signals with a fixed period. Measuring channel voltage and reference channel voltage of the four-channel infrared sensor and an output value of a differential pressure type gas pressure sensor are acquired. The breathing gas concentrations are monitored, and alternating components of all channels are acquired through wave crest and wave trough differential values of all the channels. Measuring data of three measuring channels are adjusted through a correction equation, and an adjusted numerical value of the carbon dioxide channel is obtained, an adjusted numerical value of the nitrous oxide channel and the adjusted numerical value of the ether atmosphere anesthetic gas channel are obtained. The concentrations of different gases are obtained through coefficients obtained through a calibration test and a three-order polynomial. A determined formula is fit according to the previous calibration test and a two-order polynomial through the output value of the gas pressure sensor, and current breathing gas pressure is determined. Real-time speed and breathing flow of breathing flow are obtained. The lung volume is obtained. The multiple kinds of breathing gas concentrations and breathing gas pressure can be synchronous monitored conveniently and fast.

The invention relates to the technical field of medical apparatus and instruments, and discloses an anesthetization spraying device with a quantitative spraying function. The device comprises a shell;a collecting box is fixedly mounted at the top end in the shell; a first exhaust pipe is fixedly connected to the left side of the collecting box; a baffle is hinged to the bottom end in the collecting box; first contact switches are fixedly installed at the top end of the baffle and the inner wall of the collecting box; first springs are fixedly installed at the top end of the baffle and the inner wall of the collecting box; an air bag is fixedly connected to the output end of the collecting box through a hose; a fixed ring is placed on the outer side of the air bag; and four sliding rods arranged at equal intervals are connected to the interior of the fixed ring in a sliding manner. According to the device, the situation that in a ventilation process of a patient in an anesthetization process, atomized airflow interacts with gas exhaled out of the body of the patient, so that the pressure intensity of the patient in the ventilation process is relatively large and shortness of breathof the patient is caused is avoided; and real-time adjustment can be conveniently carried out according to the anesthetic gas demand of the patient.

This invention discloses one paralyse gas type area sort identification device and method, wherein, the device uses multiple measurement filter slice and one reference filter to get multiple measurement signals and one reference signal to get signal to compute different concentration paralyse gas through each channel relative absorptive parameters; the relative absorptive parameter takes look of certain area polymer characters to establish two-dimensional or higher relative absorptive parameters coordinates according to the paralyse gas infrared property and to get each paralyse gas each relative map area.

A method and apparatus are disclosed for recovering and separating anesthetic gas components from waste anesthetic gases to be purged from a healthcare facility. With minimal reliance on the utility infrastructure and supplies of a healthcare facility, the method and apparatus needs only electrical or mechanical power, a source of waste anesthetic gases, and an atmospheric vent in order to operate. A heat exchanger / condenser, which uses a dedicated heat transfer fluid as a refrigerant, is employed to condense anesthetic gas components from the waste anesthetic gases as either liquid condensates or solid frosts. The warmed heat transfer fluid is cooled in a separate refrigeration unit and recycled back to the heat exchanger / condenser. A preferred embodiment of the invention is a self-contained, packaged unit which can be easily accommodated in a physician's office, small animal clinic, dental office or other healthcare facility requiring effective waste anesthetic gas management.

[Problem to be Solved]To provide a process and an apparatus for treating a waste anesthetic gas containing a volatile anesthetic and nitrous oxide, discharged from an operating room. [Means to Solve the Problem]A waste anesthetic gas containing a volatile anesthetic and nitrous oxide is introduced into an adsorbing cylinder filled with an adsorbent, where the volatile anesthetic contained in the waste anesthetic gas is adsorbed and thereby removed, and successively this gas is introduced into a catalyst layer filled with a nitrous oxide decomposition catalyst, where nitrous oxide is decomposed into nitrogen and oxygen.

A demand valve is fixedly and rigidly mounted on an anesthetic gas mixer stand in close proximity to the gas mixer. A single-patient-use disposable breathing and scavenging circuit is adapted to be removably connected to the demand valve output for permitting a patient to breath gas, or a mixture gases, supplied by the gas mixer through a remotely located disposable face mask included as a portion of the breathing circuit. The breathing circuit further includes a scavenger portion for collecting exhaled waste gas from the face mask. The scavenger portion of the circuit also is disposable.

A gas concentration measuring apparatus is in miniaturized form and permits the measurement of anesthetic gas components. A variable interferometer is provided on the basis of a Fabry Perot interferometer (1) wherein the mirrors (2, 3) can be changed in spacing with respect to each other. The mirrors (2, 3) have coatings which make possible the transmission in two spectral ranges (Δλ1, Δλ2).

A method for measuring the anesthetic agent consumption in a ventilation system has a breathing circuit which contains a gas mixer (1) and an anesthetic agent metering device (2). The anesthetic agent quantity, which is consumed over a pregiven time interval in the ventilation system, is determined from the sum of the determined anesthetic gas volume flows in the ventilation system which are integrated over the pregiven time interval.

The invention discloses an anesthetic gas purification device for anesthesiology department clinics. The anesthetic gas purification device comprises a storage can, an oxygen inlet pipe is arranged atthe left end of the storage can, a first one-way valve is arranged at the right end of the oxygen inlet pipe, an anesthetic gas inlet pipe is arranged at the upper end of the side face of the storagecan, a second one-way valve is arranged at the lower end of the anesthetic gas inlet pipe, a PLC is arranged at the front end of the side face of the storage can, an oxygen concentration detector isarranged at the lower end of the side face of the storage can, a connecting pipe is arranged at the right end of the storage can, a valve is arranged at the side face of the connecting pipe, and a filter is arranged at the end, away from the storage can, of the connecting pipe. The anesthetic gas purification device for the anesthesiology department clinics is simple in structure, mixed gas of oxygen and anesthetic gas can be sterilized, disinfected and filtered, the purification effect of the mixed gas is improved, harmful substances in gas are prevented from harming the human body, excessiveanesthetic gas can be adsorbed and purified, and the anesthetic gas purification device is easy to operate and high in practicability.

The invention discloses a multifunctional anesthetic pain conveyer, which comprises an anesthetic gas tank, wherein an oxygen tank is arranged at the lower part of the anesthetic gas tank; one end of each of the anesthetic gas tank and the oxygen tank is connected with a mixed gas tank through a conduit; one side of the mixed gas tank is connected with an air inlet of a mask through an output pipe; electromagnetic valves are arranged at the connected part of the mixed gas tank and the output pipe and the connected part of the anesthetic gas tank and the oxygen tank and a conduit; a sleeve sleeves the surface of the output pipe; and a heating wire is arranged in an inner cavity of the sleeve. Through the arrangement of a gas flow sensor, the amount of the gas conveyed to a patient can be effectively detected, so that the patient is effectively narcotized; through the arrangement of a pressure measuring instrument and an adjusting valve, the gas in the anesthetic gas tank, the oxygen tank and the mixed gas tank can be adjusted and measured under different conditions; and through the arrangement of a gas analyzer, the gas in the mixed gas tank can be effectively detected, so that the patient is effectively diagnosed and treated when the patient utilizes the multifunctional anesthetic pain conveyer.

The invention provides a catalyst obtained by loading at least one noble metal selected from the group consisting of rhodium, ruthenium and palladium on a support selected from silica and silica alumina, and a method for decomposing nitrous oxide using the catalyst thereof. The catalyst for decomposing nitrous oxide of the present invention cannot be easily affected by a volatile anesthetic contained in a waste anesthetic gas, can recover the activity by activation and regeneration even when deteriorated, and can reduce the amount of NOx generated to less than the allowable concentration.

The invention provides an inhalation-anesthesia exposing and monitoring device, which comprises an oxygen or air-oxygen mixed-gas tank, an inhalation-anesthetic volatilizing tank, carrier-gas pipes, a gas inlet hole, an inhalation-anesthetic exposing box, a gas outlet hole, an anesthetic-gas adsorber used in a loop, a multi-parameter anesthetic-gas monitor, an animal body-temperature maintainer, a line, a line access hole, a dissecting microscope, a constant-temperature heating plate, a small-mouse fixing hole, an invasive arterial blood-pressure monitor, a heat-preserving blanket and an operating table, wherein the oxygen or air-oxygen mixed-gas tank, the inhalation-anesthetic volatilizing tank, the inhalation-anesthetic exposing box and the anesthetic-gas adsorber are connected with the multi-parameter anesthetic-gas monitor through the carrier-gas pipes, and the animal body-temperature maintainer is connected with the heat-preserving blanket. The experiments of a plurality of large / small mice can be simultaneously carried out with sufficient and sensitive heat preservation, real-time monitoring and self-heating, and the breathing conditions of the large / small mice under an anesthetic state are observed at any moment. The inhalation-anesthesia exposing and monitoring device has the advantages of reasonable design, simplicity and convenience in operation and strong controllability and not only has the function of anesthetic-concentration monitoring, but also is provided with an anesthetic absorbing device, so that the inhalation-anesthesia exposing and monitoring device is safe and environmentally friendly.