41 results about "Anaesthetic gas" patented technology

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.

The invention discloses a method for measuring the tidal volume of an anaesthetic machine, which can effectively improve the measurement accuracy of medical anaesthetic machine in measuring the tidal volume breathed in or out by patients. The method comprises the following steps: (1) the average value measured by a flow sensor at the prior breathing-out or breathing-in stage is calculated; (2) the flow value of patients at the current breathing-out or breathing-in stage are collected; (3) the flow value of patients at the current breathing-out or breathing-in stage deducts the average value measured by the flow sensor at the prior breathing-out or breathing-in stage and the integration are accumulated in the whole breathing-out or breathing-in stage, thereby obtaining breathing-out or breathing-in tidal volume value; all factors interfering the flow measurement are compensated in real time so as to prevent the measurement results from being affected by the component, the pressure, the temperature, atmospheric pressure and environmental temperature thus achieving the purpose of correctly measuring the breathing-out or breathing-in tidal volume, greatly improving the controllability of anaesthetic effect and realizing the purpose of the method.

A device for measuring oxygen uptake and carbon dioxide production by a respiring subject based on the use of absorption spectroscopy. An absorption spectrometer using cavity enhanced absorption spectroscopy at 763 nm to measure oxygen concentration and direct absorption or wavelength modulation spectroscopy at 2.0035 μm for carbon dioxide concentration is incorporated into a breathing tube in proximity to the respiring subject. This provides measurements of oxygen and carbon dioxide concentration with a good temporal resolution which can be combined with measurements of flow rate as a function of time to obtain oxygen uptake and carbon dioxide production on a breath-by-breath basis. The device can also measure the concentration of water vapor and of anaesthetic gases in exhaled breath.

An apparatus and method for maintaining patient temperature during an anaesthetic procedure. Patients, particularly small patients, can lose body temperature when undergoing surgery or other procedures where they are anaesthetized. The process of breathing the cool anaesthetic gas contributes to the temperature loss of the patient. An anaesthetic apparatus is arranged to warm the gas being provided for the patient to breathe, to facilitate maintaining body temperature. An inspired limb of an anaesthetic circuit comprises tubing with a heating conductor for heating the inspired gas.

The invention relates to the technical field of inhalation anaesthetic equipment, and discloses an inhalation anaesthetic mask which comprises a shell I. The right side wall of the shell I is fixedlyconnected with an air intake pipe, the left side wall of the shell I is fixedly connected with a pipeline I, the pipeline I is fixedly connected with a mask body I, a sealing mechanism is arranged onthe bottom end surface of the mask body I, a condensed water collecting device is further arranged in the mask body I, a reminder device and an anesthetic return flow device are arranged between the mask body I and the shell I, and a mixing device is arranged in the shell I. By reducing the contact area between the bottom surface of a sealing ring and the face of a patient, and when the tension provided by an elastic band is constant, the pressure between the sealing ring and the face of the patient is increased, the risk of anesthetic gas leakage caused by non tight fitting of the mask and the face of the patient due to the face deformation of the hare-lip patient is reduced, the sealing between the mask body I and the face of the patient is enhanced, the anesthetic gas leakage is effectively reduced, and the condition that a surgery is affected caused by the fact that the depth of anesthesia is affected due to insufficient anesthesia dose due to the anesthetic gas leakage is avoided.

The present invention provides improved anesthesia delivery systems that consistently and reliably deliver anesthesia gas to multiple gas outlets. The systems are particularly useful for anesthetizing multiple mammals and living specimens to be imaged by a low-light level imaging system. The anesthesia delivery systems are suitable for use with conventional oxygen sources, and convert the high pressures associated with a conventional oxygen source to lower pressures suitable for use with small mammals and suitable for combination with an anesthesia gas at low flow rates. The systems include an anesthesia gas source that combines anesthesia gas with the oxygen. The combination of anesthesia gas and oxygen is supplied to one or more multiple outlets.

The invention discloses an anesthetic dosage calculation method for anesthetics. The system comprises a control center, wherein the control center internally comprises a calculation module, a recording module and a query module; the front end of the control center is in network connection with a monitoring module; the front end of the control center is further connected with an input module; the rear side of the control center is connected with a display module. The anesthetic dosage calculation method disclosed by the invention has the beneficial effects that the dosage of gaseous anesthetics in the whole anesthesia process can be accurately calculated, errors caused by manual calculation are avoided, the accuracy and precision of liquid anesthetic dosage calculation results are effectively improved, the anesthesia gas concentration and mixed gas flow are obtained, and the dosage of gaseous anesthetics in the whole anesthesia process is obtained through calculation and summation; or the anesthesia gas concentration and mixed gas flow at each anesthesia phase can be measured, the dosage of gaseous anesthetics at each anesthesia phase is obtained through calculation, and then the dosage of gaseous anesthetics in the whole anesthesia process can be determined after summation.

The patent application discloses a gas anesthesia system which comprises an anesthesia gas volatilization pot, wherein the anesthesia gas volatilization pot is connected to an anesthetic input pipe, and the end of the anesthetic input pipe stretching into the anesthesia gas volatilization pot is connected to a spraying nozzle; the bottom end of the anesthesia gas volatilization pot is in contact connection to an electronic balance; multiple heaters are disposed on the contact face between the electronic balance and the anesthesia gas volatilization pot; a temperature sensor and an in-pot pressure sensor are disposed in the anesthesia gas volatilization pot; a pressure sensor outside the pot and a flow rate sensor are disposed at a communicating position between the anesthesia gas volatilization pot and a breathing circuit; a micro controller and a display screen connected to the micro controller are disposed in a safety monitoring system; and the electronic balance, the heaters, the pressure sensor and the flow rate sensor are connected to a micro controller.

A chamber for placement over a patient while allowing medical personnel to perform a medical procedure on the patient releasing virus, bacteria, or other contaminants, including a frame forming, supporting, and operatively integrated within a transparent body including a supported arch, an unsupported arch, and a top shield extending between the supported arch and the unsupported arch, wherein the body includes at least one access hole, and wherein the chamber surrounds the patient's head and the unsupported arch deforms around the patient's body in order to capture and exhaust any virus, bacteria, or other contaminants released by the patient during the medical procedure through negative pressure. A method of using the chamber of to perform a medical procedure on a patient. Methods of preventing exposure to waste anesthetic gas released from a patient after surgery, and preventing exposure to ultrafine particles and volatile organic compounds during 3D printer use.

The invention discloses a suction-type anesthesia device of the anesthesiology department. The device mainly comprises a fixing device and a working device, a placement groove is formed in the middleof the surface of the fixing device, and a protection pad is arranged at the front side of the top of the placement groove; sleeves are symmetrically arranged at the rear side of the upper end face ofthe fixing device, first fixing plates are arranged at the left and right sides of the fixing device respectively, and sliding rails are arranged on the first fixing plates; supporting lead screws are arranged above the first fixing plates at the two sides respectively, sliding blocks are arranged below the supporting lead screws, and second fixing plates are arranged at the upper ends of the supporting lead screws; movable blocks penetrate through the supporting lead screws, first sleeves sleeve the movable blocks, and a connection rod is horizontally fixed to one side face of the first sleeve; the connection rods at the two sides are movably connected through second sleeves, cylinder tubes are fixed to the interiors of the second sleeves, an inspiration cover is fixed to the lower portions of the cylinder tubes, a breathing cover is fixed to the lower portion of the inspiration cover, and the working device is located at the right side of the fixing device. In a word, it can be guaranteed that anesthesia gas can smoothly enter the body, the gas released externally is recycled, the applicability is high, the workload of medical personnel is reduced, and the working efficiency isimproved.

The invention relates to the field of medical apparatus and instruments, and especially relates to a gas anesthesia device that can adjust anesthetic concentrations according to needs and reduce the pollution of anesthetic waste gas. An anesthetic gas tank is provided with a first trachea which matches a first valve and a first flowmeter; an oxygen tank is provided with a second trachea which matches a second valve and a second flowmeter; the first trachea and the second trachea communicate with a third trachea that communicates with a mixing mechanism; and an anaesthetic mask respectively communicate with the mixing mechanism and a waste gas recycling device. Through the gas anesthesia device, the anesthetic gas tank and the oxygen tank respectively input anesthetic gas and oxygen to themixing mechanism so as to mix into the anesthetic gas with an appropriate concentration, and then the anesthetic gas can be conveyed to the anaesthetic mask for patients to use; the waste gas breathing out from the patients can be exhausted after treated by the waste gas recycling device; through the control of the first valve and the second valve, the proportion of the anesthetic gas and the oxygen can be conveniently adjusted, so that concentrations can be conveniently adjusted; and as the waste gas recycling device can recycle the waste gas breathing out from the patients, so that pollutioncan be greatly reduced.

Disclosed is a bypass valve comprising a valve body. The valve body has a gas inlet and a gas outlet, wherein a check valve is provided at the air outlet. The check valve comprises a check valve body, a ventilation plate and a first sealing gasket. A first gas passage for gas delivering is provided within the check valve body; ventilation holes are provided on the ventilation plate; the ventilation holes are in communication with the gas outlet; the first sealing gasket is provided between the ventilation plate and the check valve body; and the first gas passage and the ventilation holes are in selective communication with each other via the first sealing gasket. The uni-directional check valve is provided in the gas air outlet in the bypass valve, causing the direction of the gas flow to be unique, overcoming the problem of imprecise concentration of the anaesthetic gas caused by the a gas backflow, and having the advantage of structural technology and better gas tightness.