92 results about "Positive pressure" patented technology

The invention discloses an automatic positive pressure tube sealing device and a tube washing device in the technical field of medical auxiliary instruments. The automatic positive pressure pipe sealing device comprises a liquid supply mechanism, the liquid supply mechanism comprises a liquid storage pipe and a pushing assembly, and the pushing assembly is arranged in a containing cavity of the liquid storage pipe. The pushing assembly comprises a piston and a pushing rod, the piston is arranged in the containing cavity, an elastic piece is arranged between the pushing rod and the piston, mechanical energy generated when the pushing rod moves is converted into stable elastic potential energy, the elastic piece is used for slowly releasing the elastic potential energy, and the piston can apply pressure to liquid in the liquid storage pipe for a long time; the liquid in the liquid storage tube is in a positive pressure state for a long time and can be in a positive pressure state relative to the blood pressure of a human body for a long time, and blood is prevented from flowing back to the venous catheter. After the push rod moves towards the piston by a certain distance, the push rod and the liquid storage pipe can be kept relatively fixed, the elastic piece can release elastic potential energy in the direction close to the piston, the elastic potential energy of the elastic piece completely acts on the piston, and automatic pipe sealing operation is achieved.

Disclosed herein is a pulsating aspiration system including a catheter and a pump system. The catheter includes an outer wall, a proximal portion, a distal portion, and an inner wall dividing the proximal portion into a central main lumen and an auxiliary lumen. The pump system is in fluid communication with the catheter and independently controls negative and positive fluid pressures within the central main and auxiliary lumens to generate a pulsating aspiration waveform at the distal end of the catheter that is variable between a maximum aspiration pressure and a maximum positive pressure. The maximum aspiration pressure can be generated at the distal end of the catheter when the resulting pressure is solely negative fluid pressure, and the maximum positive pressure can be generated at the distal end of the catheter when the positive fluid pressure balances the negative fluid pressure.

Fluid reservoir (113; 213; 313) for an aspiration line (107) of a medical system, wherein the aspiration line (107) serves to aspirate a fluid from a surgical site on a living being by means of a fluid pump of the medical system in a suction direction, comprising: - a shell (214; 314) enclosing a chamber (219; 319) designed to hold a fluid; - a separating element (215; 315) that divides the chamber (219; 319) into a first sub-chamber (219a; 319a) and a second sub-chamber (219b; 319b); - a first fluid connection (220; 320) designed to fluidically connect the first subchamber (219a; 319a) to an outer surface of the shell (214; 314), and designed to be connected to a first part (107a) of the aspiration line (107) to be connected to the fluid pump; - a second fluid port (222; 322) designed to fluidically connect the second subchamber (219b; 319b) to the outer surface of the shell (214; 314), and designed to be connected to a second part (107b) of the aspiration line (107) to be directed towards the surgical site; and - a backflow preventer that the separating element (215; 315) has to fluidically connect the first subchamber (219a; 319a) with the second subchamber (219b; 319b), wherein the backflow preventer is designed to prevent a flow of fluid from the first subchamber (219a; 319a) into the second subchamber (219b, 319b) in the opposite direction to the suction direction, and wherein the separating element is a flexible separating element (215; 315), and the flexible separating element (215; 315) is designed in such a way as to achieve a pumping effect of the fluid reservoir (113; 213; 313) in the second subchamber (219b; 319b) when the flexible separating element (215; 315) is deformed by a certain positive pressure difference between the first subchamber (219a; 319a) and the second subchamber (219b; 319b), which enables the conveyance of a certain fluid delivery volume, characterized by the fact that the specific fluid flow volume is chosen depending on the type of operation performed on a living being.

A patient interface for delivering a flow of air at positive pressure relative to ambient air pressure to an entrance to the patient's airways to ameliorate sleep disordered breathing comprises a seal-forming structure to form a seal with a region of the patient's face surrounding an entrance to the patient's airways, a positioning and stabilising structure to provide a force to hold the seal-forming structure in a therapeutically effective position on the patient's head, and a connector assembly adapted to connect to an air circuit. The connector assembly comprises a loop member removably and releasably secured in an aperture of an attachment region of the patient interface and an elbow assembly connected to the air circuit and repeatedly connectable to and detachable from the loop member. The elbow assembly comprises an elbow member and a clip member. The clip member comprises a structure separate and distinct from the elbow member and is connected to the elbow member and releasably connects the elbow assembly to the loop member, the elbow member forming a seal with the loop member when the elbow assembly and loop member are connected to each other.

Provided herein are medical devices, assemblies, and methods for circulating materials within a medical device. The adapter includes a shaft, a cannula, a female orifice lock, a male conical surface, and threads, all designed for reversible engagement and material circulation. The assembly incorporates the adapter and is designed for use with a variety of medical devices, including bone screws. The method includes engaging a medical device having a pressurizing device and a scaffold with the adapter and circulating material in the medical device via negative or positive pressure. These innovations provide a versatile approach to circulating materials within a medical device, which can be beneficial in a variety of medical procedures and therapies and can increase the efficiency and effectiveness of material circulation.

This application discloses a pressure supply device, relating to the technical field of organoids. The pressure supply device includes: a housing having an installation cavity; a positive pressure supply assembly disposed within the installation cavity, including: a first pipe, a first pump, and a first proportional valve, the first pipe having a first gas inlet and a first gas outlet, the first gas inlet being for communication with a gas source, the first gas outlet being for communication with a positive pressure interface of a culture box, the first pump and the first proportional valve being both installed in the first pipe, and the first proportional valve being located between the first pump and the first gas outlet; and a negative pressure supply assembly disposed within the installation cavity, including: a second pipe, a second pump, and a second proportional valve, the second pipe having a second gas inlet and a second gas outlet, the second pump and the second proportional valve being both installed in the second pipe, the second proportional valve being located between the second pump and the second gas inlet, and the second gas inlet being for communication with a negative pressure interface of a culture box.

This utility model discloses a positive and negative pressure switching fresh air system, comprising: an intake fan connected to an air distribution box via pipes, the air distribution box connected to the intake valves of each room via pipes and silencers; a return fan connected to a collection box via pipes, the collection box connected to the return air valves of each room via pipes; when the intake fan is turned on and all the intake and return air valves of all rooms are fully open, all rooms are in a positive pressure state; when the return fan is turned on and all the intake and return air valves of all rooms are fully open, the return air volume is greater than the intake air volume, and all rooms are in a negative pressure state; when both the intake and return air fans are fully open, if room 1 opens its intake valve and closes its return air valve, room 1 is in a positive pressure state; if room 2 opens its return air valve and closes its intake valve, room 2 is in a negative pressure state; positive pressure rooms prevent virus intrusion, and negative pressure rooms prevent virus spillover; infected individuals live in negative pressure rooms, and uninfected individuals live in positive pressure rooms, which can prevent cross-infection among family members and is very suitable for the current virus transmission situation.

A mechanical ventilation system comprises a plurality of ventilation therapy sub-systems. Each of the ventilation therapy sub-systems is adapted to assist a respiratory function of the patient. The system also comprises a detector of the respiratory drive of the patient, an operator interface receiving one or more control parameters, and a main controller. The main controller assigns a therapeutic contribution to each of the ventilation therapy sub-systems based on the respiratory drive of the patient and on the control parameters. The controller modulates the respiratory drive of a patient by controlling each of the plurality of the ventilation therapy sub-systems according to its assigned therapeutic contribution. Distinct ventilation therapy sub-systems may apply negative pressure on the abdomen of the patient, deliver a non-pressurizing inspiratory flow to the patient, or induce a positive pressure in the airways of the patient.

The invention relates to the technical field of medical instruments, in particular to a tuberculosis ward atomization respirator with a negative pressure collection function, comprising: a mask assembly, the mask assembly comprises a breathing mask and a sealing strip, and the breathing mask is internally provided with an air pressure sensor for identifying air pressure change; the atomization assembly is connected with the mask assembly and used for intermittently conveying atomized medicine into the breathing mask. During expiration, the airflow adjusting assembly does not hinder the gas flow rate of the gas feeding pipe, the gas flow rate is increased, and a low-pressure area is formed at the position of the pressure-adjustable one-way valve assembly, so that the pressure-adjustable one-way valve assembly does not hinder communication of the exhaust pipe and the negative-pressure pipe; the exhaust gas in the breathing mask is exhausted outwards through the exhaust pipe and the negative pressure pipe, the airflow adjusting assembly reduces the gas flow rate of the gas feeding pipe at the end of expiration, negative pressure collection is not conducted on the gas in the breathing mask at the end of expiration any more, namely positive pressure is provided at the end of expiration, and early closure of pulmonary alveoli is avoided.

An apparatus for treating respiratory disorders in a patient is disclosed. The apparatus includes a pressure generator configured to deliver a flow of air at positive pressure through a patient interface to an airway of the patient, a sensor configured to generate a signal representative of a respiratory flow of the patient, and a controller. And a controller configured to control the pressure generator to deliver a ventilation therapy with a base pressure and pressure support through the patient interface, an apnea being detected from the signal representative of a respiratory flow of the patient, controlling the pressure generator to deliver one or more detected breaths to the patient during the apnea, determining patency of the airway of the patient from a waveform of the respiratory flow signal responsive to one of the one or more detected breaths, an effective duration of the apnea is calculated based on the patency of the airway, and a setpoint of the base pressure for the ventilation therapy is adjusted in response to the apnea based on the effective duration of the apnea.

The invention discloses a double-cavity type positive pressure oxygen bag and a using method thereof. A double-cavity type positive pressure oxygen bag comprises an oxygen bag base body, and the interior of the oxygen bag base body is divided into an oxygen supply cavity and a positive pressure pressurization cavity through a separation film; the oxygen supply cavity is connected with an input end used for being in butt joint with an oxygen source, and the input end is connected with a first control switch. The oxygen supply cavity is connected with an output end used for being in butt joint with the input end of a patient. The output end is connected with a barometer, a second control switch and a flow meter. The positive pressure pressurization cavity is connected with an extension pipe, and the extension pipe is in butt joint with the inflation balloon and the atmosphere through switching of a three-way valve. According to the oxygen bag, a traditional oxygen bag base body is divided into the two cavities, and then pressure supply of stable output gas in the oxygen supply cavity can be provided through the positive pressure pressurization cavity.

An anaesthetic gas capture device housing two reusable canisters that safely capture volatile agents from the exhaust of an anaesthetic machine while maintaining a safe connection to a hospital AGSS and enabling the anaesthetic machine to continue to work in an active AGSS mode, without alteration, the device comprises or can be connected to suction means for drawing gas exhausted from a machine to the device, the suction means operates upstream of the capture canisters, the device is configured so that the suction means pushes gas through the canisters under positive pressure in series and agent extraction occurs under positive pressure, the device is pneumatically decoupled from the anaesthetic machine so that the device cannot apply vacuum pressure to the anaesthetic machine.

The application provides a micro-liquid injection system and a method thereof, and relates to the technical field of medical devices, and solves the technical problem of inconvenient use of an injection device for subretinal drug injection used in the prior art. The system comprises an injection cylinder, a piston, a connecting hose, a transfusion connector, a needle, and a connecting piece. The piston is arranged in the injection cylinder. The injection cylinder is connected with the needle through the transfusion connector and the connecting hose. The injection cylinder is connected with a vitreous body cutting and ultrasonic emulsification integrated machine (hereinafter referred to as a vitreous body cutting machine) through the connecting piece. The application provides a micro-liquid injection system. By adding the transfusion connector, unidirectional conduction and instantaneous positive pressure can be generated, so that the injection of bubbles can be avoided as much as possible when an ophthalmologist or the like performs drug injection. The connecting hose is arranged between the injection cylinder and the needle, the distance between the injection cylinder and the needle is increased, and a nurse can observe the display on the syringe to remind the doctor of the drug injection amount.

A system for controlling the flow of fluid through a medical device may include a medical device having a lumen that extends to a distal end of the medical device; a fluid source configured to supply fluid having a positive pressure to the lumen of the medical device; and a flow controller configured to apply a negative pressure to the fluid within the lumen, wherein the flow controller is triggered to apply the negative pressure upon a lowering of the positive pressure from the fluid source.

A method is for producing individual dosing quantities of a powdered product via a drum dosing device. A dosing drum has a dosing opening on its circumference. In an ejection position, an ejection process is effected, the dosing opening being subjected to a positive pressure and the dosing quantity being thereby ejected from the opening, and an associated ejection reference time-point being determined. The individual mass of an ejected dosing quantity and an associated measurement reference time-point are determined via the measuring device. An actual time period is ascertained from the difference between the measurement reference time-point and the ejection reference time-point and compared with a specified time period. In dependence on the comparison, an adaptation of the positive pressure for a subsequent ejection process is performed such that the level of the positive pressure is increased if the actual time period is too great.

The invention discloses multifunctional ultrasonic debridement equipment, and relates to the technical field of medical equipment.The debridement equipment comprises a debridement machine body and a movable trolley, the movable trolley is provided with the debridement machine body, the debridement equipment further comprises a negative pressure unit, the negative pressure unit comprises a drainage tube, the debridement machine body is connected with the drainage tube through a tube body, and the drainage tube is connected with the movable trolley. The end of the drainage pipe is connected with a suction cup body, the side, close to the suction cup body, of the drainage pipe is connected with a backflow pipe, and the end of the backflow pipe is connected with the debridement machine body. The negative pressure is applied to the drainage tube through the debridement machine body, so that the drainage tube conducts drainage operation on seepage on a wound surface, and when the drainage tube is blocked due to blood clots or inactivated tissues, the negative pressure applied to the drainage tube by the debridement machine body is changed into positive pressure until the debridement machine body pushes blockages in the drainage tube. The blockage flows into the debridement machine body from the backflow pipe, so that the blockage of the drainage pipe is cleaned.

The invention discloses a pressure adjusting method and system for double-level respiratory support equipment, and the method comprises the following steps: in the expiration stage of a user, setting expiration positive pressure as initial pressure; detecting the breathing state of the user in real time, and when it is detected that the user enters an inspiration state, performing linear fitting based on the first pressure value to obtain a slope value; a first linear model of the target inspiration positive pressure is established according to the slope value, and the expiration pressure is increased to the target inspiration positive pressure at the initial pressure increasing speed; and in the inspiration stage, the maximum user flow is updated in real time, when the inspiration stage is switched to the expiration stage, a second linear model of the target expiration positive pressure is established based on the maximum user flow, and the target inspiration positive pressure is reduced to the target expiration positive pressure at the initial pressure reduction speed. The technical problem that the pressure boosting or reducing speed of existing bihorizontal respiratory support equipment is too high is solved.

The application discloses a respiratory tract unblocking device for a respiratory system, which comprises a breathing nozzle, a three-way pipe, an adjusting pile, a gas distribution pipe and a water storage bottle. The three-way pipe is rotationally connected with the adjusting pile at the top, fixedly connected with the breathing nozzle at the middle and fixedly connected with the water storage bottle at the bottom. The gas distribution pipe is linearly slidably connected with the water storage bottle and threadedly connected with the adjusting pile. The water storage bottle contains liquid. When a patient needs to unblock sputum, the patient only needs to exhale into the device through the breathing nozzle, so that continuous air bubbles are formed at the bottom of the water. In this process, the positive pressure exhalation can prevent the end of the airway of the patient from collapsing too early. Since the air bubbles are generated one by one, the airway can be shaken in the reverse direction. In addition, the exhalation flow rate can be accelerated, and finally the patient can better unblock the secretion in the airway.

A patient interface for delivering positive pressure respiratory therapy to a patient is disclosed. The patient interface is configured to communicate respiratory gas with the mouth and with one or both nares of the patient. The patient interface comprises a first chamber and a second chamber. The first and second chamber are in fluid communication to enable a flow of respiratory gas from the first chamber to the second chamber within the patient interface. The patient interface further comprises a respiratory gas inlet in fluid communication with the first chamber and a flow valve in fluid communication with the second chamber. Respiratory gas is exhaustible through the flow valve from the second chamber to external of the patient interface. The flow valve is configured to control a respiratory gas flow rate through the flow valve to be within a preferred range across a range of respiratory therapy pressures.

The utility model relates to a medical gas system calibration device which comprises a test module, a control module and a display module, and the control module is connected with the display module. The testing module comprises a testing pipe and a testing assembly, the testing pipe comprises a main pipe and a first branch pipe, the testing assembly comprises a flow meter, a particle counter and an oxygen measuring probe, one end of the main pipe is a positive pressure connecting end, the other end of the main pipe is a negative pressure connecting end, the flow meter is arranged in the main pipe, and a control valve is further arranged on the main pipe part between the flow meter and the positive pressure connecting end; one end of the first branch pipe is communicated with the side face of the positive pressure connecting end of the main pipe, the other end of the first branch pipe is a particle counter connector and is connected with a particle technical device, and a normally-closed first electromagnetic valve is arranged on the first branch pipe; the flow meter, the first electromagnetic valve and the oxygen measuring probe are all connected with the control module. The device is high in integration degree, calibration efficiency can be greatly improved, and field calibration of a centralized oxygen supply system, a centralized suction system and an air supply system in a medical gas system is achieved.

A cushion module for a patient interface for delivering positive pressure respiratory therapy to a user. The cushion module has a seal for forming a seal around the mouth and nostrils of the user, and has a housing connected to the seal. The housing and the seal form a cavity configured to receive a flow of pressurized gas. The sealing piece is provided with at least one opening, and the at least one opening is used for communicating the pressurized gas with the user; an inlet through which the pressurized gas is received into the cavity; an outlet through which gas is discharged from the gasket module; and an exhaust conduit configured to extract gas from the user's nostrils through at least one exhaust conduit inlet and direct it to the outlet of the cushion module.

The utility model relates to the technical field of medical instruments, in particular to a disposable negative pressure drainage device convenient to measure, which comprises a drainage tube and a negative pressure balloon, and the drainage tube comprises an adsorption section and a drainage section; a first one-way valve is further arranged between the adsorption section and the drainage section, and when negative pressure suction force is generated in the negative pressure balloon, the first one-way valve is opened, so that the adsorption section is communicated with the drainage section; a positive pressure component is further arranged on the drainage section and used for conveying air into the drainage section. The positive pressure part is used for conveying air into the drainage section, drainage liquid remaining in the drainage section can be concentrated into the negative pressure balloon under pushing of airflow, and therefore metering accuracy can be improved when the total drainage amount in unit time is counted; moreover, after the residual drainage liquid in the drainage section is cleaned, the breeding of bacteria in the drainage section is effectively inhibited, so that the risk of infection of the patient in drainage treatment is reduced.

The invention discloses a culture system, and relates to the technical field of organoids. The culture system comprises a culture device which comprises a first base, an air guide assembly and a first driving mechanism; the first base is provided with a bearing part for bearing a culture box, and the air guide assembly is provided with a plurality of first air ports and a plurality of second air ports which are communicated; the first driving mechanism is mounted on the first base and is used for driving the air guide assembly to move, so that the second air port of the air guide assembly is communicated with or disconnected from the air path interface of the culture box; the imaging device is arranged opposite to the observation window of the culture box along a third direction; the pressure supply device comprises a positive pressure supply assembly and a negative pressure supply assembly, the positive pressure supply assembly is provided with a first gas outlet, and the first gas outlet is communicated with some first gas ports so as to provide positive pressure for the gas guide assembly; the negative pressure supply assembly is provided with a second gas inlet, and the second gas inlet is communicated with the other first gas ports so as to provide negative pressure for the gas guide assembly.

The invention relates to a treatment device for carrying out an intermittent treatment of at least part of the body of a person using negative pressure and / or positive pressure. According to the invention, in order to improve the known treatment device in such a way that, for a given indication of the treatment, the individual constitution of the person to be treated can be automatically appropriately taken into account, a "human-machine interface" is provided in the treatment device which detects selected vital values of the person to be treated in order to, by means of a controller, individually determine the treatment parameters, i.e. the duration of the negative and / or positive pressure phases and the magnitude of the negative and / or positive pressure, taking into account the vital values, in order to thereby achieve optimal treatment results.

The invention relates to the technical field of tissue specimen preservation, in particular to tumor specimen auxiliary storage equipment for tumor surgery. The device comprises a base, the top of the base is rotationally connected with an adjusting sealing cover, a low-temperature cavity is defined by the interior of the adjusting sealing cover and the top of the base, and the top of the adjusting sealing cover communicates with an air inlet; when the tumor specimen in the low-temperature cavity is taken out, the top of the side, away from the axis, of the specimen temporary storage piece is in sliding fit with the inner bottom wall of the sealing block, it is ensured that the space size of the buffer cavity is gradually reduced, and it is ensured that the upper portion of the buffer cavity is always kept sealed, so that a positive pressure space is formed in the buffer cavity; cold air originally coming from the low-temperature cavity in the inner part is discharged from an opening which is opened due to the rising of the sealing block; when a new clinical tumor specimen is stored in the low-temperature cavity, external air in a buffer cavity space below the low-temperature cavity is driven away through the downwards-pressed sealing block.

The utility model belongs to the field of container sealing integrity testing, and particularly discloses a pre-filling needle medicine positive and negative pressure testing support which comprises a support fixing seat and pre-filling needle supports, the pre-filling needle supports are evenly distributed on the periphery of the support fixing seat and connected with the support fixing seat, and a clamping seat can freely move up and down along a trapezoidal guide rail and can be adjusted to a proper position. The position of the clamping seat is locked and fixed through the second knurled screw, the device can adapt to pre-filling needle medicines with different liquid loading quantities, the testing universality and flexibility are improved, the position of the clamping seat is fixed through the second knurled screw, operation is easy and convenient, the position of the pre-filling needle push rod is easy to adjust and fix, the testing efficiency and convenience are improved, and the testing efficiency is improved. The support fixing seat can test a plurality of pre-needle-filling drugs at a time, and the combined and installed support is integrally placed in a closed container for detection, so that the detection efficiency is greatly improved, and the time and the labor cost are saved.

The embodiment of the invention provides a double-channel flow control valve and positive and negative pressure medical equipment. The double-channel flow control valve comprises a valve body and a valve element, the valve body is provided with a hollow inner cavity, and the valve body is provided with a first input port, a second input port and a first output port; the valve element is arranged in the hollow inner cavity and provided with a first flow channel, and one end of the first flow channel communicates with the first output port. The valve element is movably connected to the hollow inner cavity so that at most one of the first input port and the second input port can communicate with the other end of the first flow channel. When the first input port is communicated with the first flow channel, the first input port, the first flow channel and the first output port form a positive pressure channel; when the second input port communicates with the first flow channel, the second input port, the first flow channel and the first output port form a negative pressure channel. According to the dual-channel flow control valve, rapid switching between a positive pressure channel and a negative pressure channel can be achieved, continuous adjustment of flow or pressure can be achieved, and a flow oscillation waveform or a pressure oscillation waveform meeting requirements can be output.

The utility model relates to medical instrument technical field, concretely relates to a sterile dispensing system. The system includes the filter that outputted to the external medicine dispenser connected in proper order on the air path of valve plate and air pump, and the piston of external medicine dispenser is driven to retreat to inhale liquid medicine after air pump suction drive, and the piston of external medicine dispenser is driven to advance to push out liquid medicine after air pump jet drive, the outlet pipe diameter of air pump is 6~12mm, the valve plate air path pipe diameter is 6~8mm, the filter outlet pipe diameter is 4~6mm, and the power of air pump is less than or equal to 200W, and the filter export wind pressure range is positive pressure 0~0.4Mpa, negative pressure less than or equal to -89Kpa. The sterile dispensing system of the utility model, the outlet pipe diameter of air pump, the valve plate air path pipe diameter and the filter outlet pipe diameter three sizes are special design, and experiment verifies that the system local resistance is small, and the airflow flows smoothly, and the system stability is strong, and the reliability is good.

The oral cavity impression tray comprises a tray body provided with a tray handle and a tongue-shaped plate, the tray body is provided with a first notch and a second notch which correspond to dentitions on the two sides, and a plurality of blocking strips which are used for blocking impression materials and are of the same structure are arranged on the outer sides of the first notch and the second notch. One side of the first notch is connected with a positive pressure pipe for blowing air to the first notch and the second notch, a first overflow frame and a second overflow frame which are located behind the blocking strip are fixedly arranged on the outer side of the first notch and the outer side of the second notch correspondingly, and one side of the second notch is connected with a negative pressure pipe. The negative pressure pipe is provided with a first suction pipe and a second suction pipe which extend into the first overflow frame and the second overflow frame. According to the utility model, the impression material can be prevented from being mistakenly swallowed and sucked at the throat part, the safety of a patient is ensured, the strong negative pressure formed by ultrahigh adaptation of the tray body and mouth mucosa after the impression material is solidified can be removed, and the tray body is ensured to be smoothly taken out.

The embodiment of the invention provides positive-pressure column passing equipment. The positive-pressure column passing equipment comprises a seat body, a pore plate and a positive-pressure assembly, the positive pressure assembly is provided with a gas inlet and a plurality of gas inlet units, each gas inlet unit comprises a gas outlet, a gas inlet cavity and a gas outlet cavity, the gas inlet cavity is communicated with the gas inlet, the gas outlet cavity is communicated with the gas outlet, and the gas outlet corresponds to the mounting hole and is used for allowing gas to enter the solid-phase extraction column. The air inlet unit has a communicating state and a separating state; the gas inlet unit correspondingly abuts against the solid-phase extraction column, so that the gas inlet cavity communicates with the gas outlet cavity, a gas flow path sequentially passing through the gas inlet, the gas inlet cavity, the gas outlet cavity, the gas outlet and the solid-phase extraction column is formed, and the gas inlet unit is in a communicating state; when the gas inlet unit is separated from the solid-phase extraction column, the gas inlet cavity and the gas outlet cavity are separated to cut off the gas flow path, and the gas inlet unit is in a separated state. The positive pressure column passing equipment provided by the embodiment of the invention can reduce the risk of gas leakage.