31 results about "Noninvasive ventilation" patented technology

A human-machine synchronization method and device of an invasive ventilator operating in a noninvasive ventilation mode. The method includes steps of: measuring an airway pressure, an inspiratory flow, and an expiratory flow; calculating a gas leakage flow according to a pre-established gas leakage estimation model and by using the airway pressure, the inspiratory flow and the expiratory flow; and compensating a basic flow according to the gas leakage flow. In the above method, the gas leakage flow is estimated by means of the gas leakage estimation model, to compensate the gas leakage, thereby facilitating the noninvasive ventilation of the invasive ventilator and improving the human-machine synchronization.

A ventilator system (100/200/300/400) includes an integrated blower (130/230/330). In one case, the ventilator system includes: an inspiration port (122/222/322) for connection to an inspiratory limb (112/212/312) of a dual-limb patient circuit (110/210/310), and an expiration port (142/242/342) for connection to an expiratory limb (114/214/314) of the dual-limb patient circuit; a gas delivery device (120/220/320) connected to the inspiration port to supply a pressurized flow of gas to the inspiration port to generate a positive pressure; and a blower having an inlet (132/232/332) that is operatively connected to the expiration port and configured to be controlled to selectively supply a negative pressure level between 4 and 120 cmH₂O to the expiration port, and an outlet (134/234/334) to exhaust gas received from the expiration port. In another case, the ventilator system includes a blower to generate positive pressure/flow to augment flow for noninvasive ventilation.

The invention belongs to a detection system (01) for a noninvasive ventilation interface and particularly relates to a detection system for evaluating the air leakage and the comfortableness of interfaces such as a nasal mask, a mouth-nose mask and a full-face mask (08) for noninvasive ventilation by combining three-dimensional structure characteristics of human heads. The detection system comprises a detection air source (02), a human head three-dimensional model (03), a simulation trachea (05), a lung model (04) and a micro processing unit (07), wherein the detection air source (02) can be used for generating a designated ventilation waveform; the human head three-dimensional model (03) can be used for detecting the surface stress; the simulation trachea (05) and the lung model (04) are connected with the human head three-dimensional model and allow sensors (06) to be placed; and the micro processing unit (07) can be used for evaluating the air leakage and the comfortableness of the head and the face. The air leakage is detected by comparing the preset ventilation waveform of the air source with the actually-detected waveform of the trachea model, and the stresses of the mask worn at different positions of the head are measured by a plurality of pressure sensors arranged on the head model and are compared with a human tolerance threshold, and thus the comfortableness of the mask is judged.

The invention belongs to an experimental platform (1) for noninvasive ventilation leak detection and particularly relates to a device which achieves leak real-time detection due to synchronous monitoring and processing of pressure and flow at different points of a breathing route during the noninvasive ventilation process. A system of the experimental platform for the noninvasive ventilation leakage detection comprises a breathing machine control system which can achieve breathing machine functions, a leak detection module (02) which comprises a plurality of flow sensors, pressure sensors and a data acquisition card, a LabVIEW based micro processing and display unit (03), a face mask and a fixing device (04) thereof, a simulation trachea (05) and a lung model (06). According to the experimental platform for the noninvasive ventilation leak detection, synchronous monitoring and processing of multi-channel flow and pressure signals are achieved due to driving and filter circuits of the flow sensors and pressure sensors and a data acquisition and processing algorithm and three selectable leak real-time detection methods which comprise a leak branch circuit based flow detection method, a breathing branch circuit based flow difference value detection method and a face mask front-rear end flow difference value detection method are achieved through connection of three different breathing structures.

The present invention provides a control method integrating oxygen production and assisted respiration, which is used to produce oxygen and provide non-invasive ventilation, comprising the following steps: a. A micro-control unit controls the compressor to produce oxygen and detects changes in pressure and flow; b. The micro-control unit The control unit judges whether it is an inhalation action or an exhalation action based on the change of pressure and flow rate. If it is an inhalation action, then execute step c and step d. If it is an exhalation action, then execute step e; c, the micro control unit controls The oxygen delivery device outputs oxygen; d, the micro control unit controls the oxygen delivery device to stop outputting oxygen, and controls the fan to perform the inhalation action; e, the micro control unit controls the fan to perform the exhalation action. The invention can realize the integrated process of oxygen production and assisted respiration.

The invention provides a control method and device for improving the effective utilization ratio of oxygen during noninvasive ventilation. The control method and device are used for improving the synchronization of a ventilator and an oxygen generator by controlling the triggering of the oxygen generator through the ventilator. The control method comprises the following steps: a, acquiring pressure flow data generated when a user breathes; b, judging whether the user performs the inhaling action or not based on the pressure flow data; c, if the user performs the inhaling action, sending oxygen generation or/and oxygen supply control instructions to the oxygen generator; d, receiving feedback information of the oxygen generator in a working state M, wherein the feedback information corresponds to the control instructions. The invention further provides the corresponding control device. Through adoption of the control method and device, the portable noninvasive ventilator and oxygen generator can be cooperatively used when a patient is positioned outside or in other environments, and thus the patient can receive noninvasive positive-pressure ventilation treatment and oxygen therapy at the same time.

The invention is a system that comprises both an Airway and Ventilation device (AV) and an Automated External Defibrillator (AED) device. The system is provided with means for assisting only minimally trained persons to operate it in emergency situations involving respiratory failure and/or cardiac arrhythmias. An integral part of AV of the system is a face mask comprised of two parts—a face attachment unit configured to attach to the patient's face and a mask body that is releasably connected to the face attachment unit by a quick release mechanism allowing quick removal of the mask body from the face attachment unit, leaving only the face attachment unit attached to the patients' face, in order to address urgencies such as vomiting. After vomiting ceases and is cleared, then the mask body may be reattached to continue ventilation.

Determining the lung compliance and lung resistance of a subject undergoing respiratory therapy using non-invasive ventilation requires taking the presence of leaks into account. In particular, variable and unintentional leaks at or near a subject interface appliance may be dynamically determined based on an average resistance of the leak orifice of the subject.

The invention discloses a novel enclosed face mask, which comprises a mask body, wherein an enclosed pad is arranged on a lower edge of the mask body; a connecting pipe is connected to an upper top surface of the mask body; a hang strip ring is sleeved at the connecting pipe; a through hole is formed on the mask body; a sealing cover is arranged at the through hole; one part of the sealing cover is fixedly connected with an outer edge of the through hole and the other part of the sealing cover is arranged on the mask body through a fixing handle on the sealing cover, and a screw is arranged on a part corresponding to a fixing hole on the fixing handle; a nasal feeding tube hole is formed on the sealing cover; a nick is formed on the fixing handle; one end of the nick is communicated with the nasal feeding tube hole; and a gland matched with the nick is arranged at the nick. By the face mask, a stomach tube food injection end which is placed previously is pulled out of the face mask, air leakage at the stomach tube on the face mask and face compression are avoided during noninvasive ventilation, the conditions that the stomach tube is pulled out and noninvasive ventilation treatment is used in order to reduce the air leakage and lighten face compression are avoided, patients are actively rescued, and the workload of medical personnel is reduced.

The invention relates to the technical field of medical breathing equipment, in particular to a humidifier for noninvasive ventilation. The humidifier comprises a bottom case, a heating assembly, a humidifier main body and an upper cover, wherein the humidifier main body is provided with a water box; the heating assembly is fixed at the bottom case; a through hole is formed in the bottom of the humidifier main body; a heating disc of the heater assembly is embedded in the through hole; the heating disc and the bottom of the humidifier main body form the bottom surface of the water box; an air inlet hole and an air outlet hole are formed in the side surface of the water box; the air inlet hole is connected with a flow disturbing device capable of scattering airflow entering the water box. The humidifier for noninvasive ventilation is provided with the flow disturbing device, so that the airflow entering the humidifier can be scattered and fully contacts the water surface in the humidifier; the humidifying effect is good; the integral humidifier main body replaces the separated water box and main body structure in the prior art; the heating effect is better; the structure of the humidifier is simple; the cost is lower.

The invention discloses a noninvasive ventilation hood, which comprises a pressure gauge, a hood and an annular air bag, wherein the hood is connected with the annular air bag and is provided with the pressure gauge, movable air holes, a leak valve and an air inlet; the annular air bag is provided with an air bag charging port; the pressure gauge is provided with a pressure gauge adjusting button. According to the noninvasive ventilation hood, in a ventilation process, the annular air bag can be used for effectively fixing the hood, so that the comfort of a patient can be improved, and the skin of the patient is prevented from being injured by a fixing band of the conventional nose mask; positive end-expiratory pressure is set by adjusting the pressure of the pressure gauge to keep the pulmonary alveolus of the patient in a functional state; meanwhile, the circulation of gas in the hook can be ensured by the leak valve, so that carbon dioxide accumulation is avoided for the patient; the noninvasive ventilation hood is easy to operate and is convenient to use, and the comfort of the patient can be improved while ventilation is ensured.

The invention relates to an efficiency evaluation system for noninvasive ventilation equipment. The system comprises a human three-dimensional head model, a simulated trachea, an active simulated lung and a processing unit, wherein one end of the simulated trachea is communicated with a month-nose channel in the three-dimensional head model, and the other end is communicated with the active simulated lung; the three-dimensional head model comprises a hard skeleton layer, a pressure sensor layer and an elastic cladding in sequence from inside to outside; a flow sensor for detecting actual flow entering the active simulated lung is arranged on the simulated trachea; the pressure sensor layer, the flow sensor and the active simulated lung are all communicated with the processing unit. The efficiency evaluation system for noninvasive ventilation equipment evaluates the comfort and the ventilation effectiveness when human face wears the noninvasive ventilation equipment in combination with the three-dimensional anatomic structure feature of human head and the real breathing condition of lungs, and finally evaluates the efficiency of the equipment, thereby providing a help for setting and ventilation mode of the noninvasive ventilation equipment.

The invention discloses a noninvasive ventilation nasal/mask trigger device with a function of guaranteeing pressure trigger sensitivity. The noninvasive ventilation nasal/mask trigger device comprises a pressure trigger mechanism which is closed and a pressure signal conduction mechanism; the pressure trigger mechanism is used for detecting pressure changes; the pressure signal conduction mechanism is connected with the pressure trigger mechanism; the pressure trigger mechanism comprises a pressure sensor or comprises a pressure trigger seat, a fastener and a sensing film; the pressure sensor is capable of converting surface pressure into electrical signals; the pressure trigger seat is fixedly embedded on a cover; the fastener is used for positioning the pressure trigger seat onto the cover; the sensing film fixed between the pressure trigger seat and the fastener is used for sensing the pressure changes; a cavity is formed among the pressure trigger seat, the fastener and the sensing film; the cavity is isolated from a chamber in the cover through the sensing film; the pressure signal conduction mechanism extends into the cavity of the pressure trigger mechanism and transmits transient pressure changes, sensed by the sensing film, of the chamber of the cover to a detector disposed in an noninvasive respirator.

The invention relates to the technical field of medical instruments, and discloses a nose-compression-free noninvasive ventilation mask. The mask comprises a mask body; a compression-free protection mechanism is arranged at the nose position of the mask body; a ventilation connecting pipe is fixedly connected to the center of the top of the mask body; the ventilation connecting pipe is connected with an oxygen catheter through a disassembly and assembly mechanism; the side surface of the mask body fixedly communicates with an air outlet pipe; the compression-free protection mechanism comprisesa skin-friendly layer, a pressure reduction layer and a protection layer; the pressure reduction layer is located between the skin-friendly layer and the protection layer; the skin-friendly layer islocated on the outer side of the mask body; the upper surface of the skin-friendly layer is fixedly connected with the lower surface of the pressure reduction layer; the upper surface of the pressurereduction layer is fixedly connected with the lower surface of the protection layer; and the upper surface of the protection layer is fixedly connected with the nose position of the mask body. According to the nose-compression-free noninvasive ventilation mask, the nose of a patient is free of compression, pressure sores caused to the nose are avoided, and the oxygen catheter can be conveniently and rapidly disassembled and assembled.

The invention relates to the field of auxiliary medical instruments, and particularly relates to a device for ensuring constant air leakage of a noninvasive ventilation loop. The device comprises an air leakage assembly and a ventilation pipeline vertically communicating with the air leakage assembly, wherein an air leakage port is formed in the upper end of the air leakage assembly; a limiting part is arranged on the inner wall of the air leakage assembly; a movable space is defined by the part, close to the air leakage port, of the air leakage assembly and the limiting part; and a pumping part extending outwards through the air leakage port is arranged in the movable space. During noninvasive ventilation, the ventilation loop keeps constant air leakage under different inspiration pressures and expiration pressures, man-machine synchronism can be improved, and dyspnea of a patient can be relieved.

The invention discloses non-invasive ventilation equipment for nasal high-flow humidification oxygen therapy, a control method and a control system, and relates to the technical field of oxygen therapy. An oximeter in the equipment is used for obtaining the oxyhemoglobin saturation of a tester; the target gas output device is used for acquiring the respiratory rate of a tester and outputting gas meeting set conditions; the set conditions comprise a first condition, a second condition and a third condition; the first condition comprises a condition that the oxygen concentration is within a first numerical value range; the second condition is that the temperature and the humidity are in a second numerical value range; the third condition is a condition that the flow is in a third numerical value range; the central control device is used for calculating an ROX index according to the oxyhemoglobin saturation and the respiratory rate and calculating an oxygenation index according to the oxyhemoglobin saturation in the intelligent ventilation mode; and adjusting the first value range, the second value range and the third value range according to the ROX index and the oxygenation index. According to the invention, gas meeting real-time requirements can be provided.

The invention discloses a persistent airway opening pillow, which comprises a pillowcase and a pillow inner, wherein the pillowcase is matched with human shoulders in width, and the pillow inner is arranged in the pillowcase; both sides of the pillowcase are respectively provided with a shoulder tube used for a corresponding arm to be inserted to further fix the pillowcase to the shoulders; the pillowcase is provided with a zipper used for installing the pillow inner; elastic pieces used for adjusting the size of each shoulder are respectively arranged on the shoulder tubes and the pillowcase. According to the opening pillow disclosed by the invention, the head, the neck and the shoulders of a patient can be located on the same horizontal line, and therefore an airway is effectively opened, and the noninvasive ventilation effect is improved; under the normal state of a sleep apnea syndrome patient, by using the persistent airway opening pillow, the collapse of the airway can be effectively prevented, and obstructive sleep apnea is relieved; aiming at thoracocyllosis and rachitis people, the opening pillow is capable of the chest and the back from further physiological changes; the required time for nurses during the persistent airway opening process of the airway of the patient is shortened, and the clinical working efficiency is improved.

The discloses a noninvasive ventilation mask capable of assisting in fiber bronchoscope interventional diagnosis and treatment and tracheal intubation via fiberoptic bronchoscopy under the condition of no air leakage and on the basis of ensuring continuous noninvasive mechanical ventilation. The noninvasive positive-pressure ventilation mask comprises a mask body, an air bag and a magnifying lens, the air bag can be guided by a fiber bronchoscope to be inserted into trachea intubation, and the magnifying lens can observe a whole process that an inserting structure enters the air bag and is inserted into the nasal cavity. The air bag is cone-shaped or boss-shaped and the like in a manner that the top of the air bag is larger than the bottom of the same, a round hole allowing the fiber bronchoscope to be inserted into or allowing the trachea intubation guided by the fiber bronchoscope is formed in the top of the air bag, and the top of the air bag can be turned up inwardly with the inserting structure and enters the mask body via the bottom of the air bag, so that distance from the top to the nasal cavity can be shortened.

The invention discloses a head cover for noninvasive ventilation of infant rhinobyon, which comprises a cap body; the lower surface of the cap body is provided with a connecting sleeve, and the insideof the connecting sleeve is provided with a tightening belt; the tightening belt is in the shape of ring, the front side of the outer surface of the connecting sleeve is provided with a fixing plate,and the middle part of the side surface of the fixing plate is provided with a magic sticker rough surface; one end of the side surface of the fixing plate is provided with a first magic sticker hookface; the second magic sticker hook face and the magic sticker rough surface are bonded together and clamped with a second guide pipe; the lower end of a first guide pipe and the lower end of the second guide pipe are sleeved with U-shaped connecting pipes; the side surfaces of the U-shaped connecting pipes are provided with a first ventilating short pipe and a second ventilating short pipe. Thehead cover for noninvasive ventilation of infant rhinobyon is convenient to use, comfortable to wear, and can well fix the oxygen supply pipeline, prevent from dropping from nostril and guarantee smooth breath of infants.

The invention discloses a filter used for the air pressure return pipeline of a non-invasive ventilation synchronous ventilator. One side of the filter body is provided with an inlet pipe interface, and the other side of the filter body is provided with an outlet pipe interface. There is an air filter grille between the filter bodies, a first filter cylinder is provided on the side of the filter body, a first filter element is provided in the first filter cylinder, and a second filter cylinder is provided on the other side of the filter body. A second filter element is arranged in the filter cylinder, and a reversing shaft is arranged on the filter body, and a rotating handle is arranged on the reversing shaft, and the first filter element or the second filter element can be selected to be connected to the air pressure return pipeline by turning the reversing shaft. The filter of the present invention for the air pressure return pipeline of a non-invasive ventilation synchronous ventilator is provided with two filter cylinders on the body, and one of the filter cylinders can be selected to be connected to the air pressure return pipeline by turning the reversing shaft, even if it is The used ventilator can also replace the filter element for the filter, which is fast and convenient.

A noninvasive mouth-nose switchable ventilation mask comprises a mask body, a flip board, a suspension, a facial cover, a bend, an intake connector, a leak cap, a flip board ring and a flip board silicone sealing pad. The mask body is connected with the facial cover. The suspension is disposed on the upper portion of the mask body. A face board of the mask body is provided with an air vent, an air leak and the flip board. The air leak is closed with the leak cap. The air vent is connected with the intake connector through the bend. The intake connector is connected with a respirator. A nasal mask can be used for ventilation during noninvasive ventilation, thereby ensuring a patient the ventilation effect; the nasal mask and a nasal cover can be switched according to the needs of the patient, the switching function is finished through the flip board, the flip board ring and the flip board silicone sealing pad, the sterilization of the nasal cover and nasal mask and transition time in adjustment are avoided; personal needs of patients are met at the premise of ensuring ventilation, comfort is imparted to patients, and time and labor are saved for medical staff.