86 results about "Airway structure" patented technology

A laryngeal mask airway device is provided that incorporates a video sensor, such as a CCD, CMOS or NMOS imaging chip, arranged to provide an image of the laryngeal inlet or other airway structures. The video sensor is electrically coupled to a reusable processing unit that receives the signals generated by the video sensor and generates a digital image of the interior of the patient's airway, thereby enabling the clinician to have immediate optical confirmation of the position of the mask aperture relative to the laryngeal inlet from the moment of insertion of the device.

A method for measuring tubular anatomical structures, for example lung airways, comprises isolating by at least one segmentation process a given tubular anatomical structure of interest and measuring at least one attribute of the structure of interest. A system for measuring lung airways using acquired image data is provided. The system comprises an imaging device for acquiring the image data and an image processing device coupled to the imaging device. The imaging processing device is configured for isolating by at least one segmentation process a given airway of interest, fitting an inner ellipse to an inner boundary of the given airway and an outer ellipse to an outer boundary of the airway structure using statistical techniques at a given point in the airway, and further configured for generating measurements of the given airway using the inner and outer ellipses.

The present invention concerns a method for determining optimised parameters for mechanical ventilation, MV, of a subject, comprising: a) obtaining data concerning a three-dimensional image of the subject's respiratory system; b) calculating a specific three-dimensional structural model of the subject's lung structure from the image data obtained in step a); c) calculating a specific three-dimensional structural model of the subject's airway structure from the image data obtained in step a); d) calculating a patient-specific three-dimensional structural model of the subject's lobar structure from the lung model obtained in step b); e) modeling by a computer, the air flow through the airway, using the models of the airway and lobar structure of the subject obtained in steps c) and d) at defined MV parameters; f) modeling by a computer, the structural behavior of the airway and the interaction with the flow, using the models of the airway and lobar structure of the subject obtained in steps b) and c) at defined MV parameters; g) determining the MV parameters which lead to a decrease in airway resistance and hence an increase in lobar mass flow for the same driving pressures according to the model of step d), thereby obtaining optimized MV parameters. It also relates to a method for assessing the efficacy of a treatment for a respiratory condition.

The invention discloses a personalized airway stent manufacturing technology.A personalized airway stent is manufactured by utilizing a CT image to reestablish an airway stenosis model of a patient, expanding the stenosis of the airway model in three-dimensional numerical model reestablishment software by 20%-40% and then outwards expanding the wall face of the outmost side of the processed airway model by 10% to form the outer wall of the stent.A three-dimensional numerical model of the personalized airway stent is designed through the processing.Finally, the personalized airway stent model is imported into a 3D printer, and silicone and other medical biological materials are injected to manufacture the personalized stent conforming to the airway structure of the patient.Three-dimensional modeling is performed according to airway stenosis of different patients, the personalized airway stents are designed, and the shortcomings and defects that existing commercial airway stents difficultly fit the airways of the patients and granulation tissue proliferation is easily caused are overcome.

The invention discloses a technology integrating 3D printing and silicone injection molding of an individualized airway stent mold.The technology achieves preparation of individualized medical airway stents.According to the technology, a real airway model of a patient is extracted and reestablished based on a CT image of the patient, then the individualized airway stent mold is obtained based on the model through computer aided design and the 3D printing, and finally the individualized airway stent conforming to the airway structure of the patient is prepared through silicone casting so as to reduce the risk of airway restenosis.

The invention relates to an application of ammonia to an SOFC battery and an application apparatus of the application. The application is characterized by comprising a step 1 of ammonia gas heating and a step 2 of ammonia gas decomposition. A heating and decomposition apparatus comprises a first pressure-reducing valve, a first solenoid valve, a high-temperature-exhaust-gas discharging cylinder, a heat exchange chamber, an annular high-temperature-resistant stainless-steel coil pipe, a temperature inductor, a safety vent valve, a gas-mixing chamber, a decomposition chamber, a spiral airway structure, gas dispersing and burning nozzles with igniters, a second solenoid valve, a second pressure-reducing valve, a third solenoid valve, a fourth solenoid valve, and a drying and purifying devices. The application has advantages that ammonia is free of carbon and can be used as fuel, and therefore, the 'carbon poisoning' phenomenon of an SOFC catalyst is completely overcome; during a hydrogen production process through ammonia gas decomposition, no vapor is required, so that requirements for devices and water resources are reduced; and fuel gas heating is adopted, so that the SOFC battery can be applied to a mobile device. Waste heat is utilized, and energy is effectively saved.

A method for measuring tubular anatomical structures, for example lung airways, comprises isolating by at least one segmentation process a given tubular anatomical structure of interest and measuring at least one attribute of the structure of interest. A system for measuring lung airways using acquired image data is provided. The system comprises an imaging device for acquiring the image data and an image processing device coupled to the imaging device. The imaging processing device is configured for isolating by at least one segmentation process a given airway of interest, fitting an inner ellipse to an inner boundary of the given airway and an outer ellipse to an outer boundary of the airway structure using statistical techniques at a given point in the airway, and further configured for generating measurements of the given airway using the inner and outer ellipses.

The invention discloses a high-supercharged engine air passage structure optimization design method based on data driving. The method comprises steps that parameterization design is conducted on an air valve installation angle in an air passage, the inner diameter of an air valve seat, the inner diameter of an air valve seat ring, an air passage throat flow section and a cylinder cover / air inlet pipe interface, and a CAD model is established; a one-dimensional, two-dimensional and three-dimensional CFD simulation matrix is established based on the parameters; based on a simulation result of the CFD simulation matrix, an ML machine learning algorithm is carried out to complete establishment of a model ML classification model and an ML regression model; and the ML classification model and the ML regression model carry out qualitative and quantitative evaluation on the airway structure optimization level respectively. According to the intelligent model established by adopting the method,the flowing performance of the air passage is predicted based on data driving, and the optimal design of the air passage structure can be optimally or optimally performed.

The invention relates to an air duct structure for a cast coil and a manufacturing method for the air duct structure and belongs to the technical field of production of transformers. The technical scheme is that: the manufacturing method comprises the following steps of: 1, after a wire part (6) of the coil is wound, placing a plurality of airway plates (9) outside the wire part (6), directly winding an outer mixed layer (3) consisting of glass fiber grids and glass fiber woven belts, and casting epoxy resin on the coil; and 2, after casting is finished, drawing out the airway plates to form a barrel-shaped resin layer with an airway structure outside the coil. The invention has the advantages that: compared with the air duct structure of an immersion dry time transformer, the air duct structure for the cast coil has the advantages of attractive and clean appearance, convenience for process, no occurrence of dispersing or dropping off and the like; and the resin layer is a good insulating material, so when the air duct is wound outside the cast coil, the resin layer like a set of insulating cylinder is added outside the coil, the insulating structure of the coil is enhanced, and the insulating level of the transformer is enhanced.

The invention provides a making method of a transbronchoscopic lymph node puncture training model using three-dimensional printing. The making method comprises the following steps: firstly, acquiringstructural information of throats, tracheas and bronchi of different persons through CT and three-dimensional reconstruction techniques, and making a plurality of airway models conforming to a real clinical anatomical structure via a three-dimensional printing technique; then, making simulated lymph nodes stuck on corresponding positions of the outer sidewalls of bronchi, a simulated jaw model aswell as a shell for sheltering and fixing a bronchus model; and finally, assembling various parts in accordance with anatomical positions, and covering the outermost layer with the shell. According tothe making method of the transbronchoscopic lymph node puncture training model using three-dimensional printing provided by the invention, the airway structures of the training model are highly similar to the structure of a real case, and the various airway structures in the training model are different in structure and difficulty degree, so that a training process is closer to a real clinical operating environment, and the difficulty of the training process is gradually improved; therefore, the training effect is enhanced.

The invention belongs to the field of bronchoscope intervention, and particularly relates to a bronchoscope automatic intervention method in a tracheal disease diagnosis and treatment operation, the method comprises the following steps: S1, acquiring data through CT scanning to complete three-dimensional reconstruction of a bronchus model; s2, carrying out data processing on the human bronchial tube and measuring and analyzing a reconstructed model; and S3, realizing an automatic intervention process of the bronchoscope. According to the bronchoscope automatic intervention method in the tracheal disease diagnosis and treatment operation, firstly, data are obtained through CT scanning to complete three-dimensional reconstruction of the bronchus model, then the reconstructed model is measured and analyzed, and finally the automatic intervention process of the bronchoscope is achieved according to the analysis result. The problems that in the bronchoscope interventional diagnosis and treatment process, airway structures of people of different age groups are different, focus positions are uncertain and the like are solved, a corresponding theoretical basis is provided for clinic, instability and uncertainty existing in manual operation are avoided, operation risks are reduced, and operation quality is improved.

The invention relates to a closed type return flow channel flow field control method. The closed type return flow channel flow field control method is characterized by comprising the following steps that a, according to design parameter requirements, a hypersonic air inlet duct geometric profile is designed, and the air inlet duct self-starting characteristics are simulated and analyzed; b, basedon different static pressure distribution laws in a compression surface before an inlet of a hypersonic air inlet duct during start / non-start, the pressure difference distribution before and after a shock wave is adopted, and a return flow cavity is formed in the air inlet duct to control a flow field of the air inlet duct; c, the inlet and outlet positions of a return flow channel and cross-sectional parameters of the return flow cavity are subjected to simulated analysis, and the geometric profile parameters of the return flow channel are optimized; and d, the geometric profile parameters ofthe return flow channel are adjusted to determine a final air inlet duct structure. The closed type return flow channel flow field control method can improve the starting ability of the hypersonic air inlet duct at a low Mach number and broadens the range of the working Mach number of the air inlet duct.

A tracheostoma valve (1) comprises a main air passage structure (21, 41, 42) provided with a main valve arrangement. The tracheostoma valve is switchable in response to a spurt of inhalation air from a breathing condition into a speaking condition, while the tracheostoma valve is switchable in response to a spurt of exhalation air from said speaking condition into said breathing condition. The main valve arrangement comprises an at least partly flexible bistable wall portion (22, 23, 24) which has a circumferential bordering edge (23). At least part of the bordering edge forms a hinging means around which the bistable wall portion is hingeable between a first stable position in which an orifice (41) of the main air passage structure is being blocked, and a second stable position in which said orifice is released.

The invention provides a mask capable of being equipped with liquid to filter dust particles. The mask is at least composed of a mask body, an attached air channel structure and a hydrophilic foamingbody. The mask body can be elastically deformed to be attached to the face of a wearer, and breathing airflow generated when the wearer inhales enters an air chamber in the mask only through the attached air channel structure. With the hydrophilic foaming body, absorbed liquid can adsorb dust particles in the breathing airflow so as to filter the dust particles in the breathing airflow and clean the breathing airflow, and a clean breathing environment is provided for a wearer so as to protect the health of the wearer. Besides, the breathing airflow can travel on the attached air passage structure under the condition that the attached air passage structure is hardly subjected to resistance through the breathable passage penetrating through the hydrophilic foaming body, so that the wearer can breathe smoothly, the discomfort is reduced, and the problem that the wearer is difficult to breathe due to the use of a known high-density mask is solved.

The invention discloses a pulmonary airway image segmentation method, a terminal and a storage medium, and belongs to the field of medical image processing. The method comprises the steps of obtaininga target pulmonary airway region in a medical image; based on the target pulmonary airway region, obtaining a backbone structure of a pulmonary airway; based on the backbone structure, determining atleast one starting pixel point for performing search on the medical image; based on each starting pixel point, performing the search in the medical image; in the process of performing the search on the medical image, based on a pipeline coefficient of the pixel points in the medical image, determining first to-be-selected pixel points in the medical image, wherein the pipeline coefficient of thepixel points is used for reflecting pipeline shape features of a preset medical image region where the pixel points are located; and determining image regions represented by all the first to-be-selected pixel points in the medical image as segmented pulmonary airway regions. The method improves the accuracy of the pulmonary airway structure obtained by segmentation, and is used for pulmonary airway image segmentation.

The invention discloses an engine in-cylinder space and near-wall surface visualization air passage steady flow experiment table and an experiment method, which belong to the technical field of air inlet passage testing of automobile engines. A cylinder A and a cylinder B which are completely the same are arranged on an air flow pressure stabilizing box of the experiment table to test a steady flow field in an engine cylinder; visualization of the air cylinder is achieved through the arrangement of the transparent cylinder sleeve, and in the air cylinder B, by means of the characteristic thatsoft silk threads arranged in the transparent cylinder sleeve present different swing forms in an air inlet flow field, the air inlet flow field in the cylinder is tested in combination with the principle that two-dimensional shot pictures of a camera are synthesized into a three-dimensional space graph. And in the cylinder A, an impeller anemograph kit composed of multiple layers of impellers andcorresponding tachometers is used for measuring the vortex ratio of each height in the cylinder. Compared with the prior art, the experiment table provided by the invention has the advantages of simple overall structure, low technical requirements on each test device, low cost for constructing the experiment table, simple test process, the requirement for specialty of testers is not high, the feedback speed of test results is high, and the optimization design of the airway structure can be achieved within a short period.

The invention relates to the field of medical treatment, and discloses a method for preparing a trachea cannula by utilizing digital space reconstruction and the 3D printing technology. The method comprises the following steps: (1) acquiring thin-layer CT data of a patient, reestablishing the anatomic form of the trachea below the skin of the patient, and acquiring editable three-dimensional modeldata; (2) editing the three-dimensional model, and extracting three-dimensional model data of the trachea of the patient; (3) carrying out editing by taking the three-dimensional model data of the trachea of the patient as the basis, and designing the three-dimensional model of the trachea cannula; and (4) after data importing, manufacturing the trachea cannula by adopting the 3D printing technology. According to the method, the thought of preparing the trachea cannula by utilizing digital space reconstruction and the 3D printing technology is provided for the first time in the field, with the technology provided by the invention, the patient can obtain the personalized trachea cannula, the optimized trachea cannula is designed according to the airway structure of the patient, and the stimulation and damage to the airway of the patient are reduced to the minimum.

The invention relates to a charger structure using an airway to combine cold air and hot air adjustment and keeping a constant temperature state; the features are that the charger structure comprises a charger body (1); an airway (2) is arranged in the charger body (1) housing; an air inlet (3) and an air outlet (4) are respectively connected on two ends of the airway (2) and extend outside the charger body (1); a temperature adjusting switch (7) is arranged in the airway (2) between the air inlet (3) and the air outlet (4); the airway structure is reasonably added in a conventional charger structure, so the charger can actively heat up a charging object when the temperature is low and can actively cool down the charging object when the temperature is high, thus reaching the best work state and keep working under the reasonable constant temperature, and greatly prolonging the charging object (storage battery) service life; when the voltage and current have abnormal conditions and the charging object temperature reaches an overly high state, a power supply and power discharge circuit can be cut off, thus protecting the charging object (storage battery), and preventing risks.

The invention discloses a method for making horizontal air outlet directions of two sides of an ion bar consistent in static elimination performance under the same vertical distance, and belongs to the field of static elimination. An air channel in an electrode holder is composed of an air inlet section, a mixing section, a contraction section, a throat opening and an expansion section which are connected in sequence. The tail end of the expansion section forms an electrode holder airway outlet. The air channel outlet is of a horn-shaped opening structure. An air channel of the electrode holder adopts an airflow accelerating structure mode of shrinking and expanding in sequence, so that the volume of the air channel is reduced, and the effect of accelerating the airflow velocity at an outlet of the air channel is achieved. Due to the fact that the injection angle of the outlet of the air channel is increased, a wider electricity elimination range can be obtained. Through changing an air channel structure of the electrode holder, the output state of the ionized airflow of each discharge electrode assembly is improved, so that the output air quantity of each discharge electrode assembly in the length direction of the ion rod is uniform, the airflow motion states of each discharge electrode assembly in the horizontal direction of the two sides of the ion rod are consistent in thesame vertical test distance, and a more balanced and faster electrostatic elimination effect can be achieved.

The invention relates to an airway structure in a hearth of a hard alloy and metal ceramic debinding furnace. The airway structure comprises an air inlet pipe, wherein the air inlet pipe passes through the tail end of the bottom of the hearth upwards, a first air guide pipe, a second air guide pipe and a third air guide pipe are arranged on the upper end of the air inlet pipe located in the hearth, and a fourth air guide pipe is arranged in a position, which is close to the bottom of the hearth, of the air inlet pipe located in the hearth; the first air guide pipe, the second air guide pipe, the third air guide pipe and the fourth air guide pipe are horizontally arranged in the axial direction of the hearth, the first air guide pipe and the third air guide pipe are respectively arranged onboth sides above a sintering area, the second air guide pipe is arranged just above the sintering area, and the fourth air guide pipe is arranged just below the sintering area. By adopting the structure, the uniformity of the carbon content and the volume shrinkage and weight loss rate of products in a debinding process can be guaranteed, and the problem of unstable performance of the matrix of current domestic metal ceramic products is solved.

The invention relates to a handheld sphygmomanometer with a shockproof structure. The sphygmomanometer is characterized by comprising an upper shell, a lower shell, an inner shell component, a valve component, an inflation component, a pressurized ball jacket, an airway structure and a shockproof mechanism, wherein the inner shell component is arranged between the upper shell and the lower shell, the shockproof mechanism is arranged between the inner shell component and the upper shell as well as between the inner shell component and the lower shell, the valve component is arranged on the lower portions of the shells and connected with the inflation component through a thread, a sealing ring is arranged between the valve component and the inflation component, and the valve component and the inner shell component are communicated by the airway structure arranged therebetween. The shockproof handheld sphygmomanometer is ingenious in integral structure design, and the shockproof goal is achieved well through a damping principle.

The invention relates to the field of mechanical design and manufacture, and discloses an air inlet structure of a hydraulic retarder ventilator. The upper surface of the ventilator of the present application is connected to the air inlet of the retarder cover, and the lower surface is connected to the air outlet of the electromagnetic proportional valve. , the airway structure is designed with three rotation angles of 90°. When the retarder is not working, the exhaust gas will collide at a right-angle flow rate. There is a storage room for the retarder. When passing through this channel, three collisions and separations are carried out at three right-angle turns. The retarder medium oil and the oil discharged from the retarder gas at high temperature are recovered, which increases the service life of the retarder. and performance.

The invention provides an airway structure and a corresponding oxygen generator using the same. The airway structure includes an outer shell body, an inner shell body, an air guiding member and a fanassembly, wherein air inlet holes are formed in the side surface of the outer shell body, the inner shell body is arranged in the outer shell body, and airflow space is formed between the outer wall of the outer shell body and the inner wall of the inner shell body; the airflow space is divided into an airflow channel by a muffler assembly, an air inlet is formed in the inner shell body, and the air guiding member is disposed outside a first casing; and one end of an air guiding cavity of the air guiding member communicates with the inner cavity of the inner shell body, the other end communicates with the outside, and a fan assembly is disposed in the air guiding cavity, and is used for accelerating discharge of the air. According to the airway structure, the inner shell body is arranged in the outer shell body, and the airflow space is divided into the airflow channel by the muffler assembly, so that the air is prevented from channeling, and noise is reduced; and at the same time, theair is also discharged through the air guiding member, and the heat dissipation efficiency is high.

A pulmonary secretion clearing airway structure and related airway management system is disclosed that has a double lumen portion which each lumen of the double lumen portion operably secured to an airway management system so that inspiratory fluid (air / oxygen mixtures, with or without added water vapor) is delivered to the distal end of the ventilation catheter through one of the two lumens and expired inspiratory fluid, pulmonary secretions, and pulmonary fluids are removed from the patient through the other lumen. The expiratory fluid pathway preferably includes a secretion collection system for removing the pulmonary secretions and the like from the pathway, thereby improving operation and safety of the system. The airway structure can be a ventilation catheter or a supraglottic airway system such as laryngeal mask and the like.

The invention discloses a soft airway structure of an electric driving mining dump vehicle for connecting a rear axle housing and a motor and belongs to the technical field of airway structures. An air source of the rear axle housing is connected with an airway port of a wheel side motor through matching of a soft airway body and a guide rail flange of a guide rail structure mode. The soft airway structure has the advantages that the guide rail flange is of a guide rail structure, and bolt fixing connection only needs to be performed on one side of the soft airway body, so that installation and detaching of the axle housing limited in space can be achieved easily, and maintenance is convenient; the soft airway body adopts a soft connection mode, so that under the circumference that an airway port of the wheel side assembly and the airway port of the rear axle housing are not aligned with each other or cannot be aligned with each other due to manufacture and assembling errors, connection can be achieved. Tightness can be enhanced by combing with a U-shaped limiting groove of the guide rail flange and the limiting plate, the sealing effect is good, further the radiating effect is improved, and stable and reliable support can be provided for the electric driving dump vehicle.