CN114073794A - Oxygen controller and automatic control system - Google Patents

Abstract

The invention relates to an oxygen controller and an automatic control device, comprising a continuous blood purification filter and an oxygen controller, wherein the continuous blood purification filter is communicated with the oxygen controller through a pipeline, the oxygen controller comprises a pressure regulating device and an oxygen input device, and the automatic control device is used for automatically monitoring the liquid level in the oxygen controller. The invention provides oxygen for the patient in a mode other than the lung, has small damage to the body of the patient, and has small economic burden for the patient and simple operation of medical staff.

Description

Oxygen controller and automatic control system

Technical Field

The invention relates to a medical appliance, in particular to an oxygen controller and an oxygen delivery system.

Background

The oxygen in the air is absorbed by the human body through the lung, once the lung has problems, the oxygen deficiency of the human body can occur, so that a lot of patients can be clinically treated by oxygen inhalation, but the problem of the oxygen deficiency of the patient cannot be solved even if the patient inhales oxygen in many cases, even the high-concentration oxygen inhalation aggravates the lung injury, and therefore a solution for oxygen inhalation of patients with severe lung injury is urgently needed clinically.

At present, a solution exists in clinic, namely ECMO (external pulmonary disease), but ECMO treatment has great damage to the body of a patient, great operation difficulty, extremely high cost and great management difficulty, so that the ECMO treatment is clinically used only when the lung of the patient is not damaged, and some families have to give up treatment for economic reasons. Therefore, the treatment scheme not only brings great pain to the patient, but also is a great test to the family and the medical staff of the patient.

In fact, when the patient starts to suffer lung injury and the patient has to use ECMO in the process of the patient, the condition of the patient is developed step by step, and the patient suffers great pain in the process, because the patient needs to increase the concentration of oxygen inhaled into the lung when the patient can not improve the oxygen demand of the patient body by normal oxygen inhalation, more oxygen is absorbed through undamaged lung tissues, and the high-concentration oxygen can cause injury to the lung tissues, and when the inhaled oxygen concentration exceeds 50%, the higher the inhaled oxygen concentration is, the greater the injury to the lung is. When the lungs are further damaged and the absorbed oxygen does not meet the body's oxygen demand, the inhaled oxygen concentration has to be increased further, so the patient has a vicious circle and treatment with ECMO is not considered until the final lung damage is such that the extremely high concentration (oxygen concentration 100%) of oxygen does not meet the patient's body requirements.

Therefore, the oxygen can be provided for the patient through the outside of the lung in the early stage that the patient can not improve the oxygen deficiency by oxygen inhalation, the damage to the body of the patient is small, the economic pressure is low, and the operation of medical staff is simple.

Disclosure of Invention

In order to solve the problems, the invention provides an oxygen therapy system, which has the basic principle that blood of a patient is pumped out from a great vein, the pumped blood passes through a semipermeable membrane in a continuous blood purification filter, oxygen is simultaneously sent to the semipermeable membrane through an oxygen controller, the oxygen is dispersed into the blood flowing in the filter through the semipermeable membrane, carbon dioxide in the blood can be dispersed to the outside of the membrane, so that the gas exchange of the blood is realized, and the blood with the gas exchange is finally returned to the body of the patient, so that the patient achieves the process of oxygen therapy outside the body.

An oxygen controller comprises an oxygen input device, a pressure regulating device and a liquid level sensing device for sensing the liquid level change in a cavity of the oxygen controller, wherein the pressure regulating device is arranged above the cavity; the oxygen input device is communicated with the outside through an oxygen tube, and the oxygen input device also comprises an oxygen tube opening and closing element.

Furthermore, the force application element is a spring, the pressure adjusting device further comprises a rotating head, the upper end of the spring is connected with the rotating head, and the lower end of the spring is connected with the pressing block.

Further, the rotary head is connected to the rotary pump.

Furthermore, the liquid level sensing device is a buoyancy adjusting device, the buoyancy adjusting device comprises a floater and a supporting rod, the floater is arranged at the lower part of the supporting rod, and two ends of the supporting rod are respectively provided with a rubber head.

Further, the liquid level sensing device is a liquid level receptor arranged outside the cavity, and the cavity is transparent or semitransparent.

The liquid level sensor is connected to the signal receiver through the control circuit, converts the fluctuation value of the liquid level into an electric signal and transmits the electric signal to the signal receiver through the circuit, the signal receiver transmits the signal to the instruction center, and the instruction center respectively sends an instruction to the rotary pump.

Furthermore, the oxygen input device comprises an oxygen output tube, a switch rod, a switch and an oxygen input tube, one end of the switch rod is connected with the buoyancy regulating device, and the other end of the switch rod is connected with the switch.

Furthermore, the oxygen input device comprises an oxygen tube and an oxygen tube clamp, the oxygen tube is connected to the pipeline, and the oxygen tube clamp is connected to the instruction center through a control circuit.

The invention also provides an automatic control system for the oxygen controller, which is characterized by comprising a command center and a signal receiver, wherein the command center is respectively connected with the rotary pump of the pressure regulating device and the gas clamp on the ventilation pipeline through control lines; the signal receiver is connected with the liquid level sensing device through a control circuit; the command center is connected with the signal receiver through a control line.

Further, the oxygen controller comprises an oxygen input device, a pressure regulating device and a liquid level sensing device for sensing the change of the liquid level in the cavity of the oxygen controller, wherein the pressure regulating device is arranged above the cavity, a through hole is formed between the pressure regulating device and the cavity, a pressure applying block of the pressure regulating device is positioned on the through hole, and a force applying element is connected to the pressure applying block; the oxygen input device is communicated with the outside through an oxygen tube, and the oxygen input device also comprises an oxygen tube opening and closing element.

The invention also provides an oxygen therapy system, which comprises the continuous blood purification filter and the oxygen controller, wherein the continuous blood purification filter and the oxygen controller are communicated with each other through a pipeline.

Furthermore, the continuous blood purification filter comprises a shell and a semipermeable membrane arranged in the shell, wherein the filter is divided into an inner space and an outer space by the semipermeable membrane, an input pipe and an output pipe are respectively arranged at the upper end and the lower end of the shell, and the input pipe and the output pipe are respectively communicated with the inside of the membrane; the blood of the patient enters the membrane of the blood purifying filter through the input tube of the filter, and after dialysis in the membrane, the blood leaves the filter from the output tube and flows back to the patient.

Has the advantages that: the oxygen therapy system of the present invention uses a continuous blood purification filter (CRRT) in combination with an oxygen controller to accomplish the oxygen therapy of a patient. The oxygen therapy system can effectively provide oxygen for the patient through the outside of the lung, has small damage to the body of the patient, has small economic pressure and is simple to operate by medical staff. ECMO requires the implantation of two large lines in the patient, whereas the present invention utilizes CRRT to implant only one line. The present invention is used when the patient inhales oxygen at a concentration of over 50%, which is good for the patient because the patient's lungs may be damaged by the inhalation of high concentrations of oxygen.

Drawings

Fig. 1 is a schematic structural diagram of a first oxygen input device.

Fig. 2 is a schematic view of the internal structure of the oxygen input device.

Fig. 3 is a schematic structural diagram of a second oxygen input device.

Detailed description of the preferred embodiments

The following is a brief description by way of example with reference to the accompanying drawings.

The oxygen delivery system as shown in fig. 1 includes a continuous blood purification filter and an oxygen controller. The continuous blood purification filter and the oxygen control device are communicated with each other through pipelines 4 and 8.

The continuous blood purifying filter is a common hemodialyzer or CRRT filter, and comprises a shell 32, and semipermeable membranes 34 and 41 arranged in the shell, wherein the filter is divided into an inner membrane 33 and an outer membrane 42 by the semipermeable membranes, the upper end and the lower end of the shell are respectively provided with an input pipe 31 and an output pipe 35, and the input pipe and the output pipe are respectively communicated with the inner membrane 33. The patient's blood enters the membrane 33 of the blood purification filter through the inlet tube 31 of the filter, dialyzes through the membrane 33 of the membranes 34 and 41, and then leaves the filter from the outlet tube 35 to flow back to the patient. The membranes 34 and 41 are semi-permeable membranes, for example, selected from the group consisting of common hemodialysis membranes, which only allow small molecule substances such as gases, water, inorganic salts, inflammatory mediators, etc. to pass through. Therefore, blood cells and macromolecular substances cannot permeate to the outside of the membrane 42 through the semipermeable membranes 34 and 41, carbon dioxide in blood can diffuse to the outside of the membrane, and oxygen outside the membrane can diffuse to the inside of the membrane to be combined with red blood cells, so that gas exchange is completed. The upper part and the lower part of the side wall of the shell are respectively provided with a connecting port which is respectively connected with the pipelines 4 and 8.

The oxygen controller comprises a pressure adjusting device, a buoyancy adjusting device and an oxygen input device which are arranged in a shell 26 (5 shown in the figure is also the shell and is consistent with the shell 26), wherein the pressure adjusting device and the buoyancy adjusting device are vertically arranged in the shell 26 from top to bottom, the buoyancy adjusting device is movably connected with a switch rod 10 of the oxygen input device, and as shown in figure 1, the switch rod 10 is connected with a clamp 13 at the lower end of the buoyancy adjusting device. The oxygen controller communicates with the continuous blood purification filter through lines 4 and 8.

When the continuous blood purification filter works, the inside of the membrane has a large positive pressure, so that water in the blood can permeate to the outside of the membrane. Thus, not only a certain oxygen space outside the membrane is ensured, but also a corresponding pressure outside the membrane, which is achieved by the pressure regulating device. The pressure adjusting device comprises a rotating head 1 and a pressure head 3 which are arranged in a shell, and a spring 2 is arranged between the rotating head 1 and the pressure head 3. The housing includes an air hole 22 communicating with the outside and a control air hole 23 communicating with the buoyancy adjusting means. The rotor head 1 is adjustably mounted on the top wall of the housing 26, i.e. the rotor head is movable up and down by adjustment to adjust the degree of paralytic compression between the rotor head and the pressure head. The mounting of the rotator head 1 on the housing includes, but is not limited to, a threaded fit, a push-pull fit, etc. The degree of expansion and contraction of the spring 2 is controlled by the rotary head 1 so as to change the gas pressure of the gas outside the membrane 42 of the filter, and the pressure head 3 is pushed to rise through the control gas hole 23. For example, when the spin head is rotated more upward, the pressure applied to the spring between the spin head 1 and the pressure head 3 is smaller, and the pressure of the gas for changing the outer membrane 42 of the filter to push the pressure head 3 upward through the control air hole 23 becomes smaller. When the spin head is screwed down more, the pressure applied to the spring between the spin head 1 and the pressure head 3 will be greater, and the pressure of the gas changing the outer membrane 42 of the filter will increase by pushing the pressure head 3 up through the control gas hole 23.

If the pressure outside the membrane 42 is too high to be discharged from the system in time, a large amount of gas will be squeezed into the membrane 33 and enter the body with the blood, causing an air embolism. The pressure outside the membrane 42 must be maintained within a certain pressure range.

The user can adjust the degree of deformation of the spring to adjust the pressure threshold of the pressure regulating device, which corresponds to the pressure maintained outside the membrane 42. When the gas pressure outside the membrane 42 of the filter exceeds a preset pressure threshold, the gas in the oxygen delivery system can flush the pressure head 3, and oxygen in the oxygen delivery system enters the pressure regulating device through the control gas hole 23 and is discharged out of the oxygen delivery system from the exhaust hole 22 of the pressure regulating device.

The buoyancy adjusting device is arranged in the buoyancy control device chamber 6 and comprises a support rod 25 in the housing, the two ends of the support rod are respectively provided with a rubber head 24 and a rubber head 29, a float 7 is arranged on the support rod 25, and the preferred float is arranged at the lower part of the support rod.

The buoyancy adjusting device is located below the pressure adjusting device control air hole 23. The lower end of the buoyancy regulating device supporting rod 25 is connected to one end of the switching rod 10 of the oxygen input device.

The oxygen controller is also provided with a waste liquid outlet, and in a preferred design, the bottom of the shell at the other end of the shell 26 opposite to the control air hole 23 is provided with a waste liquid outlet 28. The waste opening may discharge liquid from the housing 26 as desired.

The oxygen input device comprises an oxygen output pipe 9, a switch rod 10, a switch 11 and an oxygen input pipe 12. The oxygen input device shown in fig. 2 comprises an outer housing 1001 and an inner housing 1002, wherein the inner housing is slidably connected with the outer housing, the inner housing is provided with an oxygen passage 61, the outer housing is connected with oxygen pipes 9 and 12, and the inner wall of the outer housing is provided with an oxygen passage 62 corresponding to the oxygen passage on the inner housing. Reference numeral 10 denotes an arm bar, which is also referred to as a switch lever. When the arm power rod rotates, the inner housing 1002 is driven to rotate in the outer housing, so that a gas channel formed among the oxygen output tube 9, the oxygen channel 62, the oxygen channel 61 and the oxygen input tube 12 is opened or closed. The outer housing 1001 is mounted on the outer housing of the housing 26 of the oxygen therapy device, the outer housing is matched with the inner housing, and a sealing gasket is arranged between the outer housing and the inner housing to ensure the sealing property. The other end of the switch lever 10 is connected to the buoyancy adjusting device.

The medical staff can not be on the side all the time during the work, so the safety of the patient is ensured by the buoyancy adjusting device arranged in the oxygen controller. Because the pressure in the membrane 33 varies during operation with changes in the patient's position, the viscosity of the patient's blood, and the amount of blood clots. Therefore, various problems may occur during the extracorporeal oxygen therapy, resulting in the pressure inside the continuous hemo-evolution filter membrane 33 becoming higher or lower. The change in pressure within the membranes causes the original level of pressure differential between the interior and exterior of the membranes 34 and 41 to be disrupted, which can be problematic if the filter remains in operation. It is necessary to maintain the pressures inside and outside the membranes 34 and 41 in an equilibrium state by human intervention.

When the pressure in the membrane 33 becomes high, the liquid in the membrane 33 is transferred to the outside of the membrane 42, and the liquid level outside the membrane 42 rises. The increased liquid outside the filter membrane 42 enters the oxygen control device through conduit 8, which in turn causes the liquid level in the oxygen delivery controller 26 to rise. As the liquid level in the oxygen delivery controller 26 rises, the buoyancy regulating device in the oxygen delivery controller 26 rises as the liquid level in the oxygen delivery controller 26 rises. When the buoyancy adjusting device rises to the process that the rubber head 24 blocks the control air hole 23, the arm power rod 10 movably connected with the buoyancy adjusting device is driven, and the air switch 11 is closed along with the rotation of the arm power rod 10. After the gas switch 11 is closed, oxygen cannot enter from the gas input pipe and the oxygen output pipe, and cannot exit from the filter. Thus, when the amount of liquid in the membrane 33 flowing into the membrane 42 is limited, the space inside the membrane 42 is occupied by the liquid and gas present therein.

When this occurs, the medical personnel need to adjust the oxygen controller to allow it to operate again. First, the rotary head 1 should be rotated to compress the spring and thereby increase the pressure of the pressure head 3 against the control air hole 23, typically by 3 to 5 mm hg. The change in pressure can also be detected by the waste hydraulic probe 27. When the pressure is adjusted, the arm force rod 10 is rotated to open the gas switch 11, and the buoyancy adjusting device is also moved downwards, so as to drive the rubber head 24 to leave the control air hole 23. When the gas gradually enters the membrane 42, because the pressure of the pressure head 3 on the control air hole 23 is greater than the pressure outside the membrane 42, the liquid outside the membrane 42 gradually transfers to the membrane 33, so that the liquid level of the oxygen therapy controller 26 drops, when the liquid level drops to a required level, the medical staff judges the pressure of the pressure head 3 on the control air hole 23 by observing the liquid level height in the oxygen therapy controller 26, thereby regulating the pressure of the pressure head 3 on the control air hole 23 to be the same as the pressure outside the membrane 42, and restarting the continuous blood evolution filter to start working again.

When the pressure in the membrane 33 is too low, the liquid in the membrane outer 42 will be transferred to the membrane inner 33, and at this time, the liquid level in the oxygen controller housing 26 will drop, so that the buoyancy adjusting device will also drop, and the buoyancy adjusting device will drive the arm bar 10 to rotate downward during the dropping process, so as to close the gas switch 11. Because oxygen is closed, no gas enters, and no gas needs to be discharged, the pressure head 3 can block the control air hole 23 due to the downward elastic force action of the spring 2, so that the membrane outer 42 and the oxygen controller form a closed space, liquid outside the membrane 42 can not continuously enter the membrane, and even if the liquid enters, the liquid can not continuously enter, and a large amount of gas can not enter a blood system. Experiments prove that if more gas enters the membrane at the upper end of the filter, the gas can be extruded by the liquid at the lower end of the filter when the lower end of the filter is provided with a part of liquid. Therefore, when liquid is arranged at the lower end of the filter, a large amount of gas cannot enter the blood system and enter the body of a patient, and the safety of the patient is ensured.

At this time, the medical staff is required to continue adjusting the oxygen controller. The pressure of the pressure head 3 to the control air hole 23 is adjusted, the rotating head 1 is rotated to reduce the compression of the spring 2, and further the pressure of the pressure head 3 to the control air hole 23 is reduced, and the pressure is 3 to 5 mm Hg smaller than the pressure measured by the waste liquid pressure probe 27. At this time, the pressure outside the membrane 42 is smaller than the pressure inside the membrane 33, the liquid inside the membrane 33 will flow to the outside of the membrane 42, so that the liquid level outside the membrane 42 rises, the liquid level inside the oxygen controller housing 26 also rises, the buoyancy adjusting device rises, the arm rod 10 drives the switch 11 to open the gas passage 9, when the oxygen controller reaches the required level, the pressure of the pressure head 3 to the gas hole 23 is adjusted to be the same as the pressure outside the membrane 42, so that the liquid level is not changed, and the operation can be continued.

Experiments prove that if more gas at the upper end of the filter enters the membrane, as long as the lower end of the filter is provided with a part of liquid, when the gas flows to the lower end of the filter, the gas is extruded out by the liquid at the lower end because the gas is lighter than the liquid, so that when the lower end of the filter is provided with the liquid, a large amount of gas cannot enter a blood system and enter a patient body, and the safety of the patient is ensured.

When treating a patient, all adjustments are based on when there is blood flow in the membrane 33, and if there is no blood flow in the membrane 33 at the same time, the oxygen delivery controller is adjusted after the blood flow in the membrane has been allowed to flow, all probes on the device being the same as probes on the CRRT or hemodialysis machine.

Since the membranes 34 and 41 are life-span, the life span is represented by the pressure difference between the inside of the membrane 33 and the outside of the membrane 42, which is called the trans-membrane pressure. If the transmembrane pressure is too high, the service life is shortened. Therefore, the oxygen controller can be also provided with a pressure probe 27 which can be connected to a waste liquid pressure probe of the CRRT machine, so that when the pressure at the front end 31 and the rear end 35 of the filter is measured by the machine, the machine can calculate the transmembrane pressure at the same time, the machine can determine whether to close the pump blood according to the level of the transmembrane pressure as in the blood purification, thereby ensuring the safety, and can also determine whether to change the filter according to the transmembrane pressure.

The buoyancy and gravity of the float 7 moving up and down are enough to drive the switch rod 10, the switch 11 is matched with the oxygen controller shell 26, and the tightness of the oxygen controller is guaranteed. The switch 11, and thus the buoyancy adjusting means, can be adjusted as needed by the switch lever 10.

Fig. 3 shows an alternative design of the oxygen delivery system of fig. 1, with the addition of automatic control elements. The oxygen delivery system shown in fig. 3 includes a continuous blood purification filter and an oxygen controller.

The continuous blood purification filter and the oxygen control device are in communication with each other via lines 104 and 108.

The continuous blood purification filter is a conventional hemodialyzer or CRRT filter and comprises a filter body 107, a filter housing and a semipermeable membrane disposed within the housing, the semipermeable membrane dividing the filter into two spaces, an inner space and an outer space. The upper end of the shell is an arterial end and is provided with an arterial end input pipe 105, the lower end of the shell is a venous end, and a venous section output pipe 110 is arranged, and the input pipe and the output pipe are respectively communicated with the membrane. The patient's blood enters the membrane of the blood purification filter through the inlet tube of the filter, dialyzes through the membrane 33, and then leaves the filter from the outlet tube to flow back to the patient. A pre-filter pressure probe 106 is provided at the upper end of the filter, and in this embodiment pre-filter pressure probe 106 is attached to arterial end input tube 105. At the lower end of the filter is provided an intravenous end probe 109, in the embodiment shown the intravenous end probe 109 is mounted on the output tube 110 of the venous segment.

The oxygen controller comprises a pressure regulating device, a buoyancy regulating device, an oxygen input device and a control system.

The pressure regulating device comprises a rotary pump 100, a rotary pump rotating head 101 connected with the rotary pump, the rotary pump rotating head is connected with the elastic device shell 102, and the rotating head 101 and the pressure head 122 are connected with each other through a spring 114. The rotary pump 100 is connected to a command center 124 through a control line 123. The spring exerciser housing 102 is also provided with a gas outlet 121.

The pressure adjusting device and the buoyancy adjusting device are vertically connected, a vent pipe is arranged between the pressure adjusting device and the buoyancy adjusting device, and a gas clamp 103 is arranged on the vent pipe. The gas clamp 103 is connected to a command center 124 by a control line 126.

The buoyancy regulating device comprises a cavity 200 and a liquid level receptor 127 arranged on the cavity. The level sensor 127 is connected to the signal receiver 128 via a control line 129. The chamber 200 communicates with the filter through lines 104 and 108.

The lower end of the buoyancy adjusting device cavity 200 is further provided with a waste liquid end probe 131 and a waste liquid outlet 113, and the waste liquid end probe 131 and the waste liquid outlet 113 both extend out from the shell 130 of the cavity 200. The oxygen input device comprises an oxygen tube 112 and an oxygen tube clamp 111. An oxygen delivery tube 112 is connected to the conduit 108. The oxygen hose clamp 111 is connected to the command center 124 via a control line 132.

The command center 124 is connected with the signal receiver 128 through a control line.

If the pressure in the filter 107 changes, the liquid level in the oxygen controller 130 will change, and when the pressure in the oxygen controller 130 changes, the outside liquid level sensor will detect whether the liquid level is rising or falling, the liquid level sensor 127, the liquid level sensor working principle can be realized by the difference of the speed of the ultrasound in the water and the air, or the refraction principle of the light in the water and the air. The value of the liquid level fluctuation is converted into an electric signal and transmitted to the signal receiver 128 through the line 129, and the signal receiver 128 transmits the signal to the command center 124, and the command center 124 gives commands to the rotary pump 100 and the gas clamps 103 and 111, respectively. The instruction center is a machine for leading current to a gas clamp through a line, the machine can be a clamping motor arranged at the gas clamp, and can also be a machine which is arranged at the gas clamp and can be used for clamping a switch by using the principle of an electromagnet and only generating magnetic force by electrifying, or a wife receiving device or a Bluetooth receiving device and the like are arranged on the gas clamp. When the command center 124 receives a signal indicating that the liquid level in the oxygen controller is falling, it indicates that the pressure in the oxygen controller 130 is greater than the pressure in the membrane of the filter 107, and the command center 124 sends a command to the rotary pump 100 to rotate the rotary head 101, and the spring is stretched to reduce the pressure below the pressure head 122, so as to reduce the pressure in the oxygen controller, raise the liquid level in the oxygen controller 130 to a specified level, and finally find the equilibrium pressure inside and outside the membrane. When the command center 124 receives a signal that the liquid level in the oxygen controller is rising, it indicates that the pressure in the oxygen controller 130 is less than the pressure in the membrane in the filter 107, and the command center 124 sends a command to the rotary pump 100 to rotate the rotary head 101 to compress the spring, so that the pressure head 122 increases the pressure below, thereby increasing the pressure in the oxygen controller, lowering the liquid level in the oxygen controller 130 to a specified level, and finally finding the equilibrium pressure inside and outside the membrane. The intelligent equipment greatly reduces the tedious work of manual adjustment, is more efficient and reduces the oxygen therapy interruption time of patients.

When the liquid level in the oxygen therapy controller is too high or too low during the adjustment process and the adjustment is invalid, the command center 124 simultaneously sends a clamping command to both gas clamps 103 and 111 to ensure the safety of the patient.

When the gas clamps 103 and 111 are closed at the same time, the whole device is checked whether the device is in a usable state, if the device is usable and the patient needs to continue the external oxygen therapy, the instruction center is manually adjusted, and the adjustment is divided into the following two methods:

when the liquid level in the oxygen therapy controller is too low, the regulating command center 124 sends a command to enable the rotary pump 100 to rotate the rotary head 101 to enable the spring to extend, the pressure of the pressure head 122 to the gas hole below the rotary head is reduced, the pressure in the oxygen therapy controller is reduced, liquid in the membrane is transferred to the outside of the membrane, the liquid level in the oxygen therapy controller is further raised, and when the liquid level reaches a certain height, the machine is enabled to enter a working state, and the machine can conduct regulating work according to the set liquid level height.

When the liquid level in the oxygen delivery controller is too high, the regulation command center 124 sends a command to enable the rotary pump 100 to rotate the rotary head 101, the spring 114 is compressed, the pressure of the pressure head 122 on the gas hole below the pressure head is increased, the command center 124 sends a command to enable the gas clamps 113 and 111 to be opened simultaneously, at the moment, oxygen or air or mixed gas of air and oxygen is input to the outside of the membrane through the oxygen pipe 112, the pressure in the oxygen delivery controller is gradually higher than the pressure in the membrane, liquid outside the membrane is gradually transferred to the membrane, the liquid level is gradually reduced, and finally the machine can be in a working state when the set level is reached, and the command center can be regulated again according to the height of the liquid level.

During the treatment process, the oxygen therapy controller is adjusted to ensure that the blood flow in the membrane is smooth, and the oxygen therapy controller can be adjusted only on the basis of the smooth blood flow.

The clinical application of the oxygen therapy system comprises the following steps. The continuous blood purification filter is pre-filled, and after the physiological saline or the pre-filling liquid is added into the oxygen controller to a certain level, the oxygen controller is connected with the filter. Then the liquid level in the oxygen controller is adjusted to carry out oxygen therapy on the patient.

Claims (10)

1. An oxygen controller comprises an oxygen input device and is characterized by further comprising a pressure adjusting device and a liquid level sensing device for sensing liquid level change in a cavity of the oxygen controller, wherein the pressure adjusting device is arranged above the cavity; the oxygen input device is communicated with the outside through an oxygen tube, and the oxygen input device also comprises an oxygen tube opening and closing element.

2. The oxygen controller of claim 1, wherein the force applying element is a spring, and the pressure regulating device further comprises a swivel head, an upper end of the spring being connected to the swivel head, and a lower end of the spring being connected to the pressure applying block.

3. The oxygen controller of claim 2, wherein the swivel head is connected to a rotary pump.

4. The oxygen controller as claimed in claim 1, wherein the liquid level sensing means is a buoyancy adjusting means comprising a float and a support rod, the float being mounted on a lower portion of the support rod, the support rod having rubber heads at each end thereof.

5. The oxygen controller of claim 1, wherein the level sensing device is a level sensor mounted outside the chamber, and the chamber is transparent or translucent.

6. The oxygen controller as claimed in claim 5, further comprising a signal receiver, a command center and a control circuit, wherein the liquid level receptor is connected to the signal receiver through the control circuit, the liquid level receptor converts the value of the fluctuation of the liquid level into an electric signal to be transmitted to the signal receiver through the circuit, the signal receiver transmits the signal to the command center, and the command center respectively sends commands to the rotary pump.

7. The oxygen controller as claimed in claim 4, wherein the oxygen input means comprises an oxygen output tube, a switch rod, a switch and an oxygen input tube, one end of the switch rod is connected with the buoyancy regulating means, and the other end is connected with the switch.

8. The oxygen controller as claimed in claim 1, wherein the oxygen input means comprises an oxygen tube and an oxygen tube clamp, the oxygen tube is connected to the pipeline, and the oxygen tube clamp is connected to the command center through a control line.

9. An automatic control system for an oxygen controller is characterized by comprising a command center and a signal receiver, wherein the command center is respectively connected with a rotary pump of a pressure regulating device and a gas clamp on a vent pipeline through a control circuit; the signal receiver is connected with the liquid level sensing device through a control circuit; the command center is connected with the signal receiver through a control line.

10. The automated control system of claim 9, wherein the oxygen controller comprises an oxygen input device, a pressure regulating device and a liquid level sensing device for sensing the change of the liquid level in the cavity of the oxygen controller, the pressure regulating device is arranged above the cavity, a through hole is arranged between the pressure regulating device and the cavity, a pressure applying block of the pressure regulating device is positioned on the through hole, and a force applying element is connected to the pressure applying block; the oxygen input device is communicated with the outside through an oxygen tube, and the oxygen input device also comprises an oxygen tube opening and closing element.

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