164 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.

An interface for positive pressure respiratory therapy includes a mask assembly having a mask seal and a mask shell. The mask assembly is positioned lower than and exposes a bridge of the user's nose. The mask seal includes first and second portions on respective first and second sides of a nasal region that contact opposing sides of the user's nose. The first and second portions each include supports that help maintain a shape of the mask seal. A pair of covers can be supported relative to the mask assembly and adjacent a respective one of the first and second portions of the mask seal. The covers limit expansion of the first and second portions of the mask seal in response to pressurized air within the mask seal. The supports of the first and second portions can transfer load from the mask seal to the covers.

The invention discloses a constant-frequency positive-pressure superposition high-frequency oscillation supporting device and method applied to a breathing machine, and belongs to the technical field of medical breathing machines, and the constant-frequency positive-pressure superposition high-frequency oscillation supporting device comprises a monitoring module for monitoring physical state data of a patient; the evaluation module is used for evaluating whether auxiliary sputum excretion operation needs to be carried out or not according to the physical state data; the equipment control module is used for determining ventilation parameters of the ventilation equipment and foam driving parameters of the foam driving equipment according to the body state data; the ventilation equipment is used for providing ventilation airflow and ventilation pressure for the patient according to the ventilation parameters; the lung sputum monitoring module is used for monitoring the lung sputum discharge state of the patient and adjusting foam driving parameters according to the lung sputum discharge state. According to the breathing machine, the combination of ventilation and sputum excretion functions of the breathing machine is realized through a method of combining a foam-driven sputum excretion technology with a ventilation technology.

The invention relates to a sucking massage structure and a massager, and belongs to the technical field of massage equipment. The sucking massage structure comprises a first massage opening, a second massage opening and a pneumatic control assembly, and the first massage opening and the second massage opening are used for being attached to the skin of a massage part; the pneumatic control assembly is respectively communicated with the first massage opening and the second massage opening; the air control assembly alternately blows and sucks air to the skin of the massage part through the first massage opening and the second massage opening so as to apply positive pressure and negative pressure. The pneumatic control assembly is configured to apply opposite air pressure to the skin of the massage part through the second massage opening when positive pressure or negative pressure is applied to the skin of the massage part through the first massage opening; the first massage opening and the second massage opening share at least part of the side wall. According to the sucking massage structure provided by the embodiment of the invention, the massage effect can be improved, and better use experience can be provided for a user.

A method of manufacturing a patient interface for sealed delivery of a flow of air at a continuously positive pressure with respect to ambient air pressure to an entrance to the patient's airways includes collecting anthropometric data of a patient's face. Anticipated considerations are identified from the collected anthropometric data during use of the patient interface. The collected anthropometric data is processed to provide a transformed data set based on the anticipated considerations, the transformed data set corresponding to at least one customised patient interface component. At least one patient interface component is modelled based on the transformed data set.

A patient interface device to deliver continuous positive pressure gas from a ventilator to a user's nasal airway, which includes a front chamber section, a sealing structure, a ventilation component, and a positioning stabilizer. The front chamber section is bent towards one side of the user's face to form a main chamber and has at least one opening to install the ventilation component. The sealing structure has two shaped single-layer wall protrusions and communicates with the main chamber of the front chamber section. The ventilation component includes a noise reduction material, a ventilation component body, and a port cover. The positioning stabilizer is configured to be set on both ends of the front chamber section to provide a connection between components to secure the patient interface device. When in use, the exhaled waste gas is discharged into an external environment through the ventilation component.

The invention provides a one-way bioreactor sampling connecting device and application thereof, and relates to the technical field of bioreactor culture, the one-way bioreactor sampling connecting device comprises a sealing cover, a sampling pipe penetrating through the sealing cover, a sampling pipeline communicated with the sealing cover, and a pressure adjusting pipeline; a sample in the bioreactor is guided to a sample collecting device through a sampling pipeline, the sampling pipeline can enable liquid in the bioreactor to flow into the sample collecting device through a peristaltic pump, the sampling pipeline is closed, and the liquid cannot flow back into the bioreactor; the pressure adjusting pipeline can be used for carrying out pressure maintaining air tightness detection on the sampling bottle, and also can be used for sampling through the liquid outlet end of the sampling pipe after compressed air is introduced for pressurization to enable the pressure in the bottle to be positive pressure. The technical problems that in the prior art, repeated negative pressure pumping sampling is needed, flow cutoff is likely to happen, bubbles are generated, the biochemical characteristics of samples are affected, backflow is likely to be caused, and operation is complex and pollution is caused are solved.

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.

The invention relates to an orthopedic device comprising a main part with a first surface which is provided with at least one adhesive region. At least one recess is provided in the main part, said at least one recess being at least partly formed behind the adhesive region and being provided with a pressure and / or suction connection. The first surface is designed to be at least partly suctioned into the recess when negative pressure is applied in the at least one recess and / or pushed out when positive pressure is applied.

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.

The invention discloses a closed positive pressure connector, and relates to the technical field of medical machinery. Comprising a shell, an input port and an output port are formed in the upper end and the lower end of the shell respectively, a piston is arranged in the shell, the periphery of the top of the piston is attached to the inner wall of the shell in a sealed mode to form a positive pressure cavity, a push plate is connected to the bottom of the piston through a bearing, and a first elastic piece is installed between the bottom of the push plate and a bottom solid area of the shell; a pushing mechanism is mounted on one side in the piston and comprises a first mounting groove, a push rod is connected into the first mounting groove through a second elastic piece, a sealing push plate is fixedly connected to the top of the push rod and sleeves the periphery of the connecting column, and a connecting groove is formed in the bottom of the push rod; and a pull-back assembly is mounted in the connecting groove, so that constant pressure is always kept in the positive pressure cavity, and blood backflow and thrombus formation are effectively avoided.

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.

Provided herein is a device comprising a cuirass, which includes a shell, at least one sensor, a pressure creation means for providing at least one of a negative pressure or a positive pressure within the shell, and a controller operably connected to the pressure creation means, wherein the controller is adapted to receive an input signal from the at least one sensor and adapted to provide an output signal to the pressure creation means, and wherein the pressure creation means is adapted to provide a greater or lesser amount of pressure within the shell in response to the output signal. Also provided are methods of use.

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.

An interface for positive pressure respiratory therapy includes a mask assembly having a mask seal and a mask shell. The mask assembly is positioned lower than and exposes a bridge of the user's nose. The mask seal includes first and second portions on respective first and second sides of a nasal region that contact opposing sides of the user's nose. The first and second portions each include supports that help maintain a shape of the mask seal. A pair of covers can be supported relative to the mask assembly and adjacent a respective one of the first and second portions of the mask seal. The covers limit expansion of the first and second portions of the mask seal in response to pressurized air within the mask seal. The supports of the first and second portions can transfer load from the mask seal to the covers.

The invention relates to the technical field of medicine spraying equipment, in particular to medicine spraying equipment for clinical nursing of a patient. The device comprises a medicine storage tank, a suction assembly is arranged in the medicine storage tank, the end, away from the medicine storage tank, of the suction assembly is connected with a driving assembly, and the driving assembly is connected with a spraying assembly and a liquid discharging assembly; when the piston is located in the hollow rod, negative pressure is generated on the side close to the main push rod, positive pressure is generated on the side away from the main push rod, increased air pressure is diffused into the medicine storage tank through the fixed suction pipe and the movable suction pipe, meanwhile, the stirring blades are driven by diffusion airflow and rotate at the layering position of the suspension type medicine, and therefore the medicine at the L-shaped outlet is mixed. The second branch pipe connected with the negative pressure side of the hollow rod is always in an open state, so that air pressure on the negative pressure side of the hollow rod is diffused to the suction nozzle, the suction nozzle continuously sucks saliva secreted by a patient due to invasion of foreign matters into the mouth, and the saliva flows into the collecting bottle along the direction of the suction nozzle, the second branch pipe, the third branch pipe and the collecting bottle.

The present invention discloses an anti-pulsation balloon fatigue testing device and its testing method, which includes a testing box body, a visualization cylinder body and a pneumatic pressure compensation device. The balloon is connected to a positive pressure regulating valve and a negative pressure regulating valve respectively through air pipes, and solenoid valves are used to control the air flow. When positive pressure is injected into the balloon, the solenoid valve controlling the positive pressure is opened, and the solenoid valve controlling the negative pressure is closed. Conversely, the solenoid valve controlling the positive pressure is closed, and the solenoid valve controlling the negative pressure is opened, so as to achieve the switching state of positive and negative pressures inside the balloon. The testing box body not only provides positive and negative pressures inside the balloon, but also can record the number of cycles. The present invention simulates the environment of blood vessels in the human body through the visualization cylinder body, and realizes the diastolic and systolic functions of the anti-pulsation balloon through the alternating cycle test of positive and negative pressures, so as to realize the fatigue test of the anti-pulsation balloon, and the test is more efficient.

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.

The invention relates to the technical field of medicine changing frames, and discloses a diabetic foot medicine changing frame which comprises a base used for supporting the whole device. The spherical bin is used for forming a semi-closed cavity; the positive pressure mechanism is arranged on the base and the spherical bin, and the positive pressure mechanism is used for providing a positive pressure environment for the spherical bin; the homogeneous feeding mechanism is arranged on the spherical bin, and liquid medicine is sprayed out after being uniformly mixed; and the circulating mechanism is arranged on the homogeneous feeding mechanism, so that the liquid medicine rotates in a reciprocating circulating manner when being sprayed out. According to the dressing change frame for the diabetic foot, the positive pressure mechanism is arranged, hot air in the top supporting column can enter an interlayer cavity through a passing pipe and then is output and blown through an annular exhaust port, so that a positive pressure environment is formed in the spherical bin, pollutants in external air are prevented from entering the spherical bin, and the clean and sterile state of a treated area is kept; and the safety of treatment or operation is improved.

Provided is a medical device for supplying gas of positive pressure to an airway of a patient. The medical device includes a controller that controls supply pressure, and the controller starts pressure reducing control on the supply pressure of gas when a decrease of a flow rate of the gas by a predetermined value from a peak flow rate in an inspiration period of the patient is detected.

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.

The invention discloses preparation equipment and a preparation method of a multi-layer composite medical tube, and relates to the field of forming equipment of medical tubes, the preparation equipment comprises a workbench provided with a plurality of stations, and the stations at least comprise a gum dipping station and a curing station; the impregnation station is provided with a pipe body clamp and a gluing groove, the clamp is used for clamping a prefabricated TPU outer pipe preassembled with a spring layer and a metal braid layer, and pipe cavity gluing is completed through cooperation of a lifting mechanism and the gluing groove. The equipment is provided with a vacuum positive pressure switching device which is used for sucking TPU glue to the inner wall of a pipe in a negative pressure mode and blowing and scraping redundant glue in a positive pressure mode. And the curing station is provided with a curing device, so that rapid cross-linking curing is realized. The method can be used for efficiently preparing the composite medical tube with a stable structure and a uniform adhesive layer, and is suitable for precise medical instruments such as endoscope intubation tubes and the like.

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.

Systems and methods of this disclosure make use of positive pressure to evacuate pipeline product contained within an isolated section of pipeline. In embodiments, an inert fluid is injected at a first location along the isolated section at a pressure above that of a non-isolated section of pipeline The displaced pipeline product, which may be filtered, then flows out of the isolated section at second location along the isolated section and into the non-isolated section. In other embodiments, a pressure differential between the isolated and non-isolated sections is created by lowering a pressure of the non-isolated section below that of the isolated section. The pipeline product may be a liquid, a gas, or a mixture of the two. The composition of product may be monitored as it flows through the isolated section or as it exits the section. Evacuation may be slowed or stopped based upon the composition.

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.