5 results about "High-frequency ventilation" patented technology

This invention relates to the field of high-frequency ventilator technology and discloses a high-frequency ventilator operating method based on flow control. The high-frequency ventilator sequentially outputs multiple average airway flow rates of the same or different magnitudes and with the same or different durations according to a set periodic pattern. The airway flow rate output is stable during the expiratory and inspiratory phases, and the average airway flow rate can be output at the same or different magnitudes during different inspiratory and expiratory phases. The output gas flow rate of the high-frequency ventilator can be independently adjusted periodically between different ventilation flow rate levels within different durations. In high-frequency ventilation, the flow control-based high-frequency ventilation method can precisely control the gas flow rate and time. Flow control ventilation can better control changes in airway pressure. By setting appropriate flow rates and times, the delivery volume of the device can be accurately estimated to reduce airway pressure and risks, and lower the possibility of barotrauma.

The invention relates to the technical field of high-frequency ventilation methods, in particular to a high-frequency ventilation method and system for preventing lung injury, comprising: acquiring historical control parameters of a high-frequency ventilator during anesthesia within a preset time period; real-time ventilation information is obtained, and correlation evaluation is conducted on the standardized historical control parameters and the real-time ventilation information; accumulating the real-time ventilatory capacity data in a time dimension, comparing the real-time ventilatory capacity data with a preset total ventilatory capacity requirement during anesthesia, and determining a standard grade based on a comparison difference; a first control strategy, a second control strategy and a third control strategy are generated according to the standard grade, and control parameters of the high-frequency breathing machine are optimized; and performing real-time driving control on the high-frequency breathing machine based on the optimized control parameter group. The problem of risks of volume injury, pressure injury and the like in the prior art is solved, the amplitude, the frequency, the average airway pressure and the inhaled oxygen concentration are dynamically optimized in the whole anesthesia process, and the total lung stretching amount is always kept within a safe range.

The utility model relates to the technical field of in vitro diagnosis automation equipment, in particular to a hard bronchoscope sheath applied to multiple scenes. The hard bronchoscope sheath comprises a bronchoscope sheath main body lumen; the double-path ventilation input airway is arranged on the endoscope sheath main body lumen and comprises a ventilation input airway interface and two input airway pipelines which are independent from each other; and the two input airway pipelines are respectively communicated with the ventilation input airway interface. Free switching of an independent constant-frequency ventilation input function, an independent high-frequency ventilation input function and a constant-frequency and high-frequency superposition ventilation input function can be achieved through the two ventilation input air channels. According to the constant-frequency and high-frequency superimposed ventilation input, the advantages of superimposed ventilation can be played in the breathing and interventional therapy operation process, and retention of carbon dioxide can be effectively reduced through high-frequency and constant-frequency superimposed ventilation. The problems that in the prior art, a hard bronchoscope sheath is single in function and cannot meet medical requirements of different scenes are solved.

The invention discloses a breathing machine, a real-time leakage rate estimation method and system thereof and a storage medium, a breathing machine loop, a patient airway, a lung and leakage are modeled into a physical system, and a leakage coefficient can be estimated in real time at the same time by continuously monitoring equipment end flow and airway pressure and utilizing a parameter estimation algorithm. The problem that leakage compensation fails due to the fact that the zero flow point cannot be detected in the high-frequency ventilation mode is thoroughly solved, and the application range of the precise leakage compensation technology is expanded to all ventilation modes.

The invention discloses a bronchoscope sheath with an injection mechanism, the bronchoscope sheath comprises a straight tube type bronchoscope sheath main body and an operation joint, four joints are uniformly arranged on the periphery of the operation joint along the circumferential direction, the four joints are an air injection joint and a monitoring joint which are horizontally arranged in a left-right opposite manner, and the four joints are a first instrument joint and a second instrument joint which are vertically opposite; the gas injection connector comprises a high-frequency ventilation connector, a constant-frequency ventilation connector and a first connector exhaust hole, the monitoring connector comprises a gas collection and analysis connector, a gas pressure collection connector and a second connector exhaust hole, and the high-frequency ventilation pipeline and the constant-frequency ventilation pipeline are each of a three-section structure composed of a straight pipe section, a flow guide taper section and a straight pipe section. The problems that an existing bronchoscope sheath instrument is insufficient in connector, inconvenient to insert and connect and poor in airflow conveying effect, and the airway of a patient is easily affected by sudden pressure change when the connector is inserted and pulled are solved, simultaneous operation and rapid insertion and connection of multiple instruments are achieved, and the ventilation efficiency and safety are improved.