284 results about "Hyperbaric pressure" patented technology

The invention relates to the technical field of water level monitoring, in particular to a visual monitoring system for the condensate water level of a micro-hyperbaric oxygen chamber, which adopts the technical scheme that an internal image of a water receiving box is acquired at a preset frequency, and water mist and reflective interference are eliminated by adopting a dynamic illumination compensation and frequency domain filtering technology; a U-Net deep learning model is integrated, a water level line is segmented through multi-scale feature fusion, foam and impurity artifacts are recognized in combination with time sequence analysis, a water level value is dynamically corrected, graded alarm is triggered according to a water level threshold value, an air conditioner drainage system is linked, traditional image processing and the deep learning model are combined, and detection robustness under complex working conditions is improved. Real water levels and interferents are effectively distinguished through time sequence analysis and physical characteristic modeling, the real-time requirement under the high-pressure environment is met through the model compression and hardware acceleration technology, and absolute reliability of equipment operation is ensured through linkage of a grading early warning mechanism and a drainage system.

Embodiments of the present disclosure provides a respiratory ventilation apparatus including: a main body configured to generate a high pressure gas above atmospheric pressure. The main body may include a noise reduction device, the noise reduction device being configured to reduce a noise generated during an operation of the main body. The noise reduction device may include a gas inlet structure, a noise reduction housing, a blower cavity, and a gas channel. A gas may enter the gas channel through the gas inlet structure. The gas channel may be formed between a sidewall of the noise reduction housing and a sidewall of the blower cavity, and the gas channel may be configured to transfer the gas. The blower cavity may be disposed with at least one cavity gas inlet along a gasflow direction. The gas in the gas channel may enters the blower cavity through the cavity gas inlet.

The invention discloses a high-pressure injection system and method. The high-pressure injection system comprises an equipment body, an injection propelling device, a needle cylinder pipeline suite, a medicine bottle replacing device, a bubble induction sensor, a gravity sensor, a pressure sensor and a control system, wherein the injection propelling device, the needle cylinder pipeline suite, the medicine bottle replacing device, the bubble induction sensor, the gravity sensor and the pressure sensor are installed on the equipment body; wherein the medicine bottle replacing device is used for containing and automatically replacing medicine bottles; the needle cylinder pipeline suite is communicated with the needle cylinder pipeline suite through a puncture outfit, and can selectively suck liquid medicine and continuously inject multiple patients; the injection propulsion device drives a needle cylinder piston to realize precise injection; the bubble induction sensor, the gravity sensor and the pressure sensor are respectively used for monitoring pipeline bubbles, medicine bottle weight and needle cylinder pressure in real time; the control system coordinates all the components, and full-automatic execution of medicine bottle replacement, medicine liquid extraction, pipeline exhaust and injection control operation is achieved. Full automation of the injection preparation process is achieved, the radiography examination efficiency is remarkably improved, the labor intensity of medical workers is reduced, and the safety and accuracy of the injection process are ensured.

The invention discloses a hyperbaric oxygen chamber device capable of being remotely monitored, and relates to the technical field related to hyperbaric oxygen therapy, the hyperbaric oxygen chamber device comprises a chamber body, a door frame is arranged at the front end of the chamber body, an oxygen pumping main machine is arranged on the lower side of the left end of the chamber body, and a monitor is arranged at the upper right corner of the front end of the chamber body; the oxygen pumping main machine and the monitor are both electrically connected with an external power source through wire harnesses, a deck chair is arranged in the cabin body, and a cabin door is arranged in the door frame. After the mechanical connection chain is forcibly interrupted and the pressure returns to normal, the spring mechanism automatically resets to enable the transmission system to be meshed again, so that the connection state of the interlocking assembly in different pressure states is realized, the risk of mistakenly opening the cabin door in a high-pressure environment is physically eliminated, and the failure risk caused by the fact that a traditional oxygen cabin depends on an electronic sensor is avoided; and the medical safety is improved.

The utility model relates to the technical field of medical instruments, in particular to a pulmonary artery wedge pressure balloon. The pulmonary artery wedge pressure balloon comprises a catheter and a balloon body, one end of the catheter is provided with an inclined and elastic bent section, the balloon body is arranged on the outer wall of the end of the bent section, an airflow cavity channel communicated with an inner cavity of the balloon body is formed in the catheter, and the airflow cavity channel penetrates out of the side wall of the other end of the catheter. The pulmonary artery pressure detector has the advantages that the structural design is simple and reasonable, the use cost is low, and the pulmonary vessel pressure information of a pulmonary artery hypertension patient can be effectively detected, so that medical staff can judge the drug effect of administration according to the information or accurately evaluate the interventional operation of the patient.

The invention relates to the technical field of material processing, and particularly relates to a control method of a cold isostatic pressing device, which realizes stable control of dynamic adjustment of pressurization, pressure maintaining and pressure relief stages through multi-parameter cooperative monitoring so as to improve the control efficiency of the cold isostatic pressing device. According to the invention, through detection from surface inspection to internal characteristics, no leakage and correct placement of materials can be ensured, pressurization safety supervision is carried out from a pressurization angle, so that the pressure in the high-pressure bin is stably increased according to a standard pressure increasing rate and a standard real-time pressure value, and the pressure in the high-pressure bin is increased along with a segmented pressure maintaining treatment process. According to the method, the control precision and strategy are adjusted in stages, the full-period requirement of materials from rapid densification to stress release is matched, the problem of excessive densification or insufficient densification caused by traditional constant-pressure pressure maintaining is solved, meanwhile, pressure relief is managed in real time, the backflow rate of hydraulic oil is controlled, and the working efficiency is improved. Material damage caused by too high speed of the high-pressure section is avoided, and the overall pressure reduction time is shortened.

The invention relates to the technical field of medical data processing, in particular to an aortic dissection rupture risk early warning method based on a CTA image, and the method comprises the steps: determining the blood pressure abnormity trend representation degree corresponding to a target patient according to the systolic pressure distribution condition of the target patient in a preset historical time period, and predicting a possible high pressure time interval; obtaining a CTA image of a target patient, and determining a precursor rupture early warning index, a new rupture spread degree and a blood pressure image correlation degree; and on the basis of the systolic pressure, the overall correlation coefficient and the current CTA image of the target patient in the current period, aortic dissection rupture risk early warning is realized through a pre-trained aortic dissection rupture risk early warning network. When the network is used, the systolic pressure, the overall correlation coefficient and the current CTA image in the current period are combined, so that the richness of network input data is enriched, and the accuracy of aortic dissection rupture risk early warning is improved.

The invention relates to the field of medical auxiliary instruments, in particular to an automatic debridement waste collecting and nursing device in operating room nursing, which comprises a collecting pipe, the collecting pipe is communicated with a collecting head, and a pressure cavity is embedded in the edge of the collecting head; the pressure cavity communicates with a transmission mechanism used for transmitting power, the transmission mechanism is connected with a high-pressure power source, and the transmission mechanism is provided with a power output end and a trigger end. The separating mechanism is used for carrying out solid-liquid separation on waste; the cleaning mechanism is used for conveying cleaning liquid to the collecting head; the power output end is in transmission connection with the collecting head, and the power output end is used for extruding the collecting head to achieve sealing when the pressure cavity is pressed. When the pressure cavity is pressed to a preset stroke, the trigger end triggers the high-pressure power source to release power so as to drive the separation mechanism and the cleaning mechanism to operate, and solid-liquid separation and collection and runner cleaning are achieved. The debridement device is used for achieving debridement integrated operation; operation interruption is reduced, and labor intensity of nursing staff is reduced.

The present application relates to the technical field of shallow and thin layer heavy oil exploitation, and particularly relates to a device and method for developing shallow and thin layer super heavy oil by using aerosol. The technical scheme is as follows: the atomization reactor is installed on the base through the atomization reactor support and is connected with the nitrogen gas pump truck through the nitrogen gas inlet; the other end of the atomization reactor is connected with the flow disturber, and the upper side of the atomization reactor is provided with a plurality of high-pressure atomization nozzles; the medicine injection metering pump is connected with the bottom of the medicine storage tank through the medicine low-pressure pipeline filter, the high-pressure pipeline of the medicine injection metering pump is connected with the high-pressure medicine bag type storage tank through the pressure maintaining overflow valve, and then is connected with the high-pressure atomization nozzles on the upper side of the atomization reactor through the gas-liquid separator. The present application improves the seepage field, reconstructs the pressure field by using nitrogen gas, and supplements the temperature field by using steam, and is a three-stage slug type process method, which can effectively exploit the shallow and thin layer super heavy oil reservoir, synergistically reduces the steam consumption with the steam huff and puff, and reduces the carbon emission by 20%-30%.

This invention discloses a portable dual-purpose drowning prevention and rescue device, relating to the field of rescue devices. It solves the problem that existing portable dual-purpose drowning prevention and rescue devices are difficult to stabilize and float the head during use, resulting in inconvenience and inefficiency. The device includes a fixing mechanism, a rescue mechanism, and two sets of arc-shaped tubes. The fixing mechanism includes shoulder pads, fixing components, and connecting components. The rescue mechanism includes an inflatable bladder and a storage tube. The invention uses the fixing mechanism to connect the two sets of arc-shaped tubes into a ring structure that fits around the neck. The fixing components then secure the shoulder pads to the shoulders, preventing the overall structure from loosening. The rescue mechanism controls the inflation and deflation of the high-pressure gas in the storage tube, allowing the inflatable bladder to inflate as needed, floating the head on both sides and ensuring the head remains stable above the water surface, thus improving rescue efficiency. The overall structure is compact, easy to wear and use, and relatively stable after fixing.

The utility model discloses a portable electric sputum aspirator, which relates to the technical field of sputum aspirators, and comprises a handle, a negative pressure pump, an air pipe and a suction pipe, the negative pressure pump is arranged in the handle, a switch for controlling the negative pressure pump is arranged on the handle, the output end of the negative pressure pump is connected with the air pipe, the portable electric sputum aspirator further comprises a middle cylinder, a partition plate is arranged in the center of the middle cylinder, and the suction pipe is arranged in the middle cylinder. The partition plate divides the middle cylinder into a left cavity and a right cavity which are an auxiliary cavity and a collecting cavity respectively. By arranging the auxiliary cavity and the collecting cavity, the auxiliary cavity and the collecting cavity are isolated through the filter screen, gas enters the auxiliary cavity through the through groove and then is discharged to the outside, sputum directly falls into the collecting barrel, and backflow of the sputum is effectively prevented; the piston block and the spring are arranged in the auxiliary cavity, when the sputum suction cannula is blocked, suction force of the negative pressure pump drives the piston block to move upwards to form a buffer space, mucous membrane damage caused by continuous high pressure is avoided, medical staff can instantly release negative pressure impact force by pulling down the piston rod, blocked sticky sputum can be quickly dredged, and the sputum cleaning effect is improved.

The invention belongs to the technical field of limb heat preservation, and particularly relates to a limb heat preservation device for electromyography examination, which comprises a frame body, the frame body is hollow, a moving plate is longitudinally connected in the frame body in a sliding manner, heat preservation boxes are symmetrically connected to the top wall of the moving plate, and the bottom wall of one heat preservation box is fixedly connected with one side of the top wall of the moving plate. The bottom wall of the other heat preservation box is slidably connected with the top wall of the movable plate, the top wall of the heat preservation box is fixedly connected with a top plate, and the bottom wall of the top plate is fixedly connected with a containing frame. The heat preservation boxes on the two sides are driven to be closed through the gravity of the lower limbs of a patient, the heating cavity conveys heat to the containing frame, uneven temperature, caused by poor blood circulation, of the tail ends of the lower limbs is avoided, the legs of the patient are fixed through airflow, the feet of the patient can also be fixed, and full-chain fixing from the thighs to the soles is achieved; meanwhile, the foot sole and the instep are attached in a self-adaptive mode according to the foot shape of the patient, suspended fixation is formed, and high-pressure airflow can massage the foot sole of the patient.

This invention provides an automated filling device integrating extinguishing agent and high-pressure gas filling functions, relating to the field of fire extinguishing device manufacturing, and particularly to a filling device and method for extinguishing agents and high-pressure gas. The device includes a ball screw stepper motor, a liquid collection chamber, a four-way valve, an operating lever, one-way valve 1, one-way valve 2, and one-way valve 3. The filling device uses a ball screw stepper motor to drive a liquid-pushing piston, controlling the filling amount of extinguishing agent by precisely controlling the piston stroke. The "operating lever + piston groove" design of the filling device integrates the pre-installation, positioning, and final tightening of the seals within the device. The filling device integrates the three key steps of extinguishing agent filling, high-pressure gas pressurization, and bottle mouth seal installation into one device, and achieves function switching through a core component, the four-way valve.

The application discloses a kind of big depth manned submersible emergency breathing system, it is related to diving equipment field, including high-pressure oxygen cylinder, the high-pressure oxygen cylinder is connected with first high-pressure valve body assembly by air pipe, the second sound filter includes sound filter main body, air inlet connecting pipe, the outside of the air inlet connecting pipe is provided with the mounting mechanism for the first sound filter and air pipe connection;The threaded sleeve is distributed with the positioning mechanism for limiting the threaded sleeve.The application is positioned by setting positioning mechanism, by the threaded sleeve is screwed to air pipe and air inlet connecting pipe, air outlet connecting pipe between, at this time, the threaded sleeve can be limited by inserting second positioning pin into annular clamping groove, to increase the stability of air pipe and air inlet connecting pipe, air outlet connecting pipe between connection, then can be made L-shaped connecting rod, threaded sleeve lose positioning simultaneously by connecting mechanism, to provide the convenience for subsequent disassembly, replacement of equipment.

High-pressure vessel (10) with a lining (300) and a composite layer (400) for reinforcing a circumference of the lining (300), wherein the high-pressure vessel (10) has the following: a cylinder part (200) along an axial direction of the high-pressure vessel (10); and Curved parts (100) that are attached to both ends of the cylinder part (200) to surround the high-pressure reservoir (10), wherein the composite layer (400) arranged on the cylindrical part (200) contains a plurality of ring layers (410) and spiral layers (420) that are alternately overlapped, wherein an annular layer (410) that is located closer to the lining (300) has a greater thickness than an annular layer (410) that is located further away from the lining (300), such that the thickness of the annular layers (410) decreases while the distance from the lining (300) increases, and wherein a layer of the composite layer (400) that is located closest to the lining (300) is an annular layer (410) among the plurality of annular layers (410), and wherein a layer of the composite layer (400) that is located furthest from the lining (300) is an annular layer (410) among the plurality of annular layers (410).

The invention discloses a negative pressure suction sheath capable of monitoring high pressure in a renal pelvis, and relates to the technical field of medical instruments, the negative pressure suction sheath comprises a sheath tube body, the end part of the sheath tube body is communicated with a sheath tube joint, and the sheath tube joint comprises a negative pressure joint, an instrument channel, a pressure release valve and a pressure measuring interface; the sheath tube body comprises a pressure measuring channel, a pressure measuring hole and a negative pressure suction channel. Through an independent pressure measuring channel composed of the pressure measuring connector, the pressure measuring channel and the pressure measuring hole, the pressure measuring connector, the pressure measuring channel and the pressure measuring hole are matched with a pressure release valve overflow monitoring mode or an external pressure sensor mode, the pressure change in the renal pelvis is captured in real time, when the pressure is close to or reaches a safety threshold value, medical staff can adjust the perfusion flow and the negative pressure parameter in time, and the operation is convenient. Medical accidents such as renal pelvis tissue swelling and necrosis caused by too high pressure are effectively avoided, so that the pressure in the renal pelvis is maintained within a safe range, the safety of an operation is greatly improved, the stone removing efficiency is improved, and the operation time is shortened.

This utility model relates to the field of cleaning equipment technology, and in particular to a high-pressure cleaning device. Its technical solution includes: a base, on which a bracket and a push rod are mounted; a water pump is installed on the side of the base opposite to the push rod; a turbine is installed at the end of the water pump; an inlet pipe is provided on the turbine; the inlet pipe is connected to the bottom of a reagent box inside a reagent tank via a medicine inlet pipe and a conduit; the negative pressure generated by the turbine's rotation automatically draws the reagent from the reagent box into the inlet pipe; an outlet connector is installed at the output end of the turbine; a pressure relief port and a pressure gauge are sequentially arranged between the turbine and the outlet connector; and pulleys are installed at the bottom of the base. This utility model features flexible movement and stable operation thanks to braked casters; a detachable medicine inlet pipe and modular reagent storage facilitate reagent replacement; and a quick-change outlet connector improves nozzle replacement efficiency and equipment versatility.

The present invention relates to a portable fill-type air respirator equipped with a combination fill and multi-stage decompression structure, the emergency air respirator providing air containing oxygen to a patient in case of a fire evacuation or emergency. Specifically, without a separate decompression structure, air is rapidly supplied using a built-in decompression valve, compressed air is refilled through a filling port, and high-pressure compressed air is decompressed in multiple stages so that, at the point of discharge, as decompression has taken place multiple times in a decompression section as well as in a discharge channel, the air is discharged in a state that is comfortable for a user to breathe in. Therefore, the present invention ensures reduction in size and portability by filling a high-pressure container with high-pressure air, and supplies high-pressure air to a user at a stable pressure via multi-stage decompression.

The utility model relates to the technical field of medical instrument related equipment, and discloses a medical instrument disinfection device which comprises a high-pressure steam box, a box body door is rotatably arranged on the front side of the high-pressure steam box, and a plurality of L-shaped plates are evenly arranged on the left inner wall and the right inner wall of the high-pressure steam box in the vertical direction. The horizontal ends of the L-shaped plates are connected with the inner wall of the high-pressure steam box, the L-shaped plates located on the left side and the right side of the high-pressure steam box are opposite, and a detachable storage groove is inserted in the upper portion between the opposite L-shaped plates in a front-back sliding mode. A plurality of through grooves are evenly formed in the inner wall of the bottom of the containing groove, a heat insulation pad is arranged on the front side of the containing groove, a T-shaped rod is arranged on the front side of the heat insulation pad, and the T-shaped rod is made of plastic materials. Compared with the prior art, the device has the advantages of convenience in taking and placing and high continuous operation efficiency.

The application discloses an anti-seepage and anti-explosion automatic control pressure high-pressure injector device and belongs to the field of image contrast diagnosis and treatment equipment. The device comprises a driving pushing unit and an injection cylinder. A hose is connected to the discharge end of the injection cylinder through a joint. A first pressure sensor, a second pressure sensor and a buffer are sequentially installed on the hose. The first pressure sensor is close to the discharge end of the injection cylinder. The buffer is arranged downstream of the second pressure sensor. A movable block in the buffer can divide a liquid channel of the connected hose and a volume-adjustable exchange chamber. The driving pushing unit is transmissionally connected to an injection plug in the injection cylinder and is electrically connected to a control box receiving signals of the two sensors. The application can compare and distinguish two types of faults, i.e. blockage and overload in the cylinder and blockage of the distal pipeline, by means of the double sensors, so that the control system can be stopped in advance for protection, the defects of lagging and poor fault tolerance of single pressure detection and identification can be made up, medical risks such as extravasation of contrast medium, pipeline burst and blood vessel injury can be reduced, the injection pressure is stable and controllable, and medical staff need not to be on duty for a long time.

The hyperbaric chamber 1 has six planar prefabricated panels 2-7 forming a rectangular cuboid. The panels may be preformed in a factory for assembly on site and may be flat and rectangular for transport into existing buildings. The panels may be sized to pass through standard doorways found in health care facilities. Each panel may be a composite of two carbon fibre layers sandwiching a core layer. The core layer may have greater bending stiffness than the carbon fibre layers and may have a layer of polyethylene terephthalate or foam. Each panel may have a peripheral flange 11 at a 45 degree angle to the panel that may have holes 12 for fastenings 13. Each panel may have carbon fibre piles, the number of which increases at or towards the flange from a central area. A metal corner triplet plate may reinforce the flanges at corners. The panels may be square and form a cube.

The utility model belongs to the technical field of medical equipment, and particularly relates to pressurizing atomization equipment which comprises an elastic braided hose used for being connected with a spray head and a peristaltic pump used for increasing the pressure of liquid in the elastic braided hose, and the pressure resistance value of the elastic braided hose does not exceed 2.07 MPa. Compared with an existing high-pressure atomization treatment mode, the high-pressure atomization treatment device is more suitable for carrying out atomization treatment on conventional general tumors, higher in safety, lower in requirement for consumables and beneficial to saving cost.

The utility model relates to the technical field of breathing instruments, in particular to a variable-flow valve terminal structure which comprises a valve terminal valve body, a high-pressure medium channel is formed in the valve terminal valve body in the length direction, and the valve terminal valve body is provided with a plurality of first air channels communicated with the high-pressure medium channel. L-shaped second air channels corresponding to the first air channels are formed in the valve terminal valve body, and electromagnetic valves are arranged at the corresponding ends of the first air channels and the second air channels. A high-pressure medium inlet is formed in one end of the high-pressure medium channel, and a high-pressure monitoring port is formed in the other end of the high-pressure medium channel; a connector is arranged at the end, away from the electromagnetic valve, of the second air channel and connected with an air outlet pipeline, and a resistance piece is arranged at the end, away from the connector, of the air outlet pipeline and used for adjusting the air flow. According to the valve terminal structure, precise control over small-flow gas is achieved, and the convenience of installation of the valve terminal structure is improved.

A valve and multi-vessel evacuation system are provided that allow for evacuating each vessel of a high-pressure vessel array upon activation of a single pressure release device (PRD). Each vessel is fluidly coupled to a respective inlet of the valve and to a respective PRD. Each of the PRDs is fluidly coupled to a secondary inlet of the valve. During normal operation, the valve blocks fluid communication between the vessels and their respective vent lines, and the PRDs block fluid communication between the vessels and the secondary inlet of the valve. When at least one of the PRDs is triggered, pressurized fluid passes through the triggered PRD and flows to the secondary inlet of the valve, at which point the pressurized fluid actuates the valve. With the valve actuated, pressurized fluid from each of the vessels can evacuate to atmosphere through the valve and corresponding vent lines.

The invention discloses a double-bottle intravenous infusion system with an adjustable mechanical constant flow valve, which comprises a compressed air power unit, a mechanical constant flow adjustable valve and an air pressure driving infusion unit, and realizes passive constant-speed infusion through a pure mechanical structure. The compressed air power unit provides an independent high-pressure air source, the mechanical constant-flow adjustable valve is of a three-level structure of pressure reduction and stabilization, laminar flow stabilization and pressure compensation feedback, fluctuation air pressure is converted into constant air flow, and the air pressure driving liquid conveying unit achieves constant-speed liquid output with gas-liquid isolation through a double-layer bottle body structure. And mechanical blockage alarm and overvoltage protection are built in. The device does not need electric power, is high in flow velocity precision, high in stability, free of pollution risk due to gas-liquid isolation, high in system integration degree, portable and long-acting, can support several-hour infusion through single inflation, is suitable for non-electric or non-electric medical scenes such as battlefield first aid, disaster rescue and MRI rooms, and can also be extensively applied to the fields of wound flushing, contrast agent injection and the like.

A self-contained breathing apparatus (SCBA) is presented that comprises a backframe configured to support a high-pressure air cylinder, a sensor module mounted to the backframe, and a console coupled to the SCBA. The console comprises a pneumatic connection coupled to the high pressure air cylinder, an electronics connection coupled to the sensor module, and a display component. The console is configured to operate in a functional mode and in an equipment check mode. In the equipment check mode, the console is configured to provide equipment check instructions to a user of the SCBA. In the equipment check mode, a sensor signal is received from the sensor module using the electronics connection. A pressure of the high-pressure air cylinder is measured using the pneumatics connection.

The utility model relates to the technical field of filling, and discloses an injection filling machine which comprises a filling pipe connected with filling equipment, a blocking groove is formed in the bottom of the filling pipe, a blocking plug is arranged in the blocking groove, and a circular shaft penetrating through the interior of the filling pipe is installed at the top of the blocking plug. A circular shaft is arranged at the end of the filling pipe, a supporting sleeve piece connected with the inner wall of the filling pipe in a supporting mode is arranged outside the circular shaft in a sleeved mode, a limiting piece is installed at the end of the circular shaft, and a first spring connected between the supporting sleeve piece and the limiting piece in a supporting mode is connected outside the circular shaft in a sleeved mode. When high-pressure conveying of the liquid medicine in the filling pipe is stopped, the sealing plug can quickly recover to block the interior of the blocking groove through the elasticity of the first spring under the condition that no liquid medicine is extruded, and the leakage situation that sealing is not timely due to the fact that the liquid medicine in the filling pipe is close to a port is avoided; therefore, the effect of improving the subsequent canning quality of the liquid medicine bottle is achieved.

The present invention relates to a pharmaceutical composition for preventing or treating pulmonary arterial hypertension, comprising a compound represented by formula I, optical isomers thereof or pharmaceutically acceptable salts thereof as an active ingredient, a method for preventing or treating pulmonary arterial hypertension using the compound, a use of the compound for preventing or treating pulmonary arterial hypertension, and a use of the compound in preparing a medicament for preventing or treating pulmonary arterial hypertension.

The utility model discloses a hydrodynamic debridement handle which comprises a handle body, a debridement tool bit is arranged at the front end of the handle body, the debridement tool bit is connected with an external hydrodynamic debridement system through a high-pressure water pipe and a waste discharge pipe, an annular groove is formed in the outer surface of the handle body, and a film pressure sensor is arranged in the annular groove. An elastic rubber sleeve sleeves the annular groove, when the handle body is held by a hand, the thin film pressure sensor is correspondingly matched with the thumb of the hand, the thin film pressure sensor is electrically connected with an external hydrodynamic debridement system, and the external hydrodynamic debridement system controls the water flow injection pressure of the debridement tool bit according to a feedback signal of the thin film pressure sensor; the water flow injection pressure of the debridement tool bit is adjusted in a hand pressing mode, so that the water flow injection pressure changes along with the change of hand debridement actions of a doctor, the doctor can conduct refined debridement on a wound surface, excessive debridement is avoided, the debridement accuracy and safety are improved, and the satisfaction degree and compliance of a patient are improved.

An apparatus and method for operating and controlling high pressure fluids is disclosed. The apparatus has a discharge chamber for receiving high pressure fluid from a source of high pressure fluid and a dose chamber for receiving a flow of high pressure fluid from the discharge chamber through a flow path from the discharge chamber to the dose chamber, the discharge chamber having an outlet. There is also a working chamber having an inlet end at one end thereof and a dose valve member having an annular sealing face around the inlet end. When the dose valve member is in a closed condition, the sealing face is in contact with an annular seat to seal the outlet; and when the dose valve member is in an open condition, there is a gap between the annular sealing face and the seat to allow high pressure fluid to move from the outlet to the inlet. The high pressure fluid in the discharge chamber at least partially holds the dose valve member in the closed condition until the pressure of the high pressure fluid in the discharge chamber is reduced, whereby the high pressure fluid in the dose chamber unseals the dose valve member to the open position.