Controlled pressure perfusion equipment and pressure adjusting method

Abstract

The invention provides controlled pressure perfusion equipment and a pressure adjusting method, and relates to the technical field of medical instruments, and the controlled pressure perfusion equipment comprises a perfusion device and an air pressure adjusting device matched with the perfusion device; the infusion device comprises an infusion bottle, a first cavity, a second cavity and an infusion needle which are sequentially communicated through a liquid flow channel; a first liquid flow channel is arranged between the infusion bottle and the first cavity; a second liquid flow channel is arranged between the first cavity and the second cavity, and the air pressure adjusting device corresponds to the infusion bottle, the first cavity and the second cavity and is used for adjusting air pressure of the infusion bottle, the first cavity and the second cavity so as to control flow parameters of liquid output from the infusion needle. According to the controlled pressure filling equipment and the pressure adjusting method, the flow parameters of the liquid output from the filling needle can be controlled, the pressure can be adjusted as needed through the air pressure adjusting device, then the flowing state of the liquid is kept stable, and the problems caused by unstable pressure are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a controlled pressure perfusion device and a pressure regulating method. Background Art

[0002] In the medical field, it is often necessary to use liquid circulation to remove cut tissue fragments. For example, in ophthalmic surgery, cut intraocular tissue fragments usually need to be removed from the eyeball through circulating fluid, and the circulation method usually requires the insertion of an irrigation and aspiration needle into the eyeball to complete the circulation of the fluid.

[0003] Conventional perfusion generally adopts the method of controlled pressure perfusion. Taking ophthalmic surgery as an example, the liquid is injected into the eyeball by pressurizing the infusion bottle. However, this method has a disadvantage, that is, the flow rate of liquid suction usually needs to be changed according to the doctor's needs, so the perfusion end needs to change the pressure to change the perfusion flow and keep the intraocular pressure constant. However, due to the large volume of the infusion bottle, the pressure changes too slowly. In this way, when the suction flow changes rapidly, the pressure in the infusion bottle changes too slowly and cannot keep up with the suction change speed, making the intraocular pressure unstable, which in turn causes various problems and brings a bad experience to patients. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a controlled pressure perfusion device and a pressure regulation method to alleviate the above technical problems.

[0005] In a first aspect, an embodiment of the present invention provides a controlled pressure perfusion device, which includes a perfusion device and an air pressure regulating device matched with the perfusion device; the perfusion device includes an infusion bottle, a first cavity, a second cavity and a perfusion needle which are connected in sequence through a liquid flow channel; wherein a first liquid flow channel is arranged between the infusion bottle and the first cavity, and the first liquid flow channel can connect and disconnect the infusion bottle and the first cavity; a second liquid flow channel is arranged between the first cavity and the second cavity, and the second liquid flow channel can connect and disconnect the first cavity and the second cavity; the air pressure regulating device corresponds to the infusion bottle, the first cavity and the second cavity respectively, and is used to adjust the air pressure of the infusion bottle, the first cavity and the second cavity to control the flow parameters of the liquid output from the perfusion needle.

[0006] In combination with the first aspect, an embodiment of the present invention provides a first possible implementation scheme of the first aspect, wherein the above-mentioned air pressure regulating device includes an air pressure regulator, and a plurality of air pressure regulating units connected to the air pressure regulator; the air pressure regulator is used to respond to the air pressure regulation operation so as to respectively adjust the air pressure of the infusion bottle, the first cavity and the second cavity through the air pressure regulating unit.

[0007] In combination with the first possible implementation of the first aspect, an embodiment of the present invention provides a second possible implementation of the first aspect, wherein the above-mentioned air pressure regulating unit includes a first air pressure regulating unit corresponding to the infusion bottle, a second air pressure regulating unit corresponding to the first cavity, and a third air pressure regulating unit corresponding to the second cavity.

[0008] In combination with the first aspect, an embodiment of the present invention provides a third possible implementation of the first aspect, wherein the first liquid flow channel is configured with a first switch valve; the first switch valve is used to achieve connection and disconnection between the infusion bottle and the first cavity.

[0009] In combination with the first aspect, an embodiment of the present invention provides a fourth possible implementation of the first aspect, wherein the second liquid flow channel is provided with a second switch valve; the second switch valve is used to realize the connection and disconnection between the first cavity and the second cavity.

[0010] In combination with the first aspect, the embodiment of the present invention provides a fifth possible implementation of the first aspect, wherein the volume of the first cavity is greater than the volume of the second cavity.

[0011] In combination with the first aspect, the embodiment of the present invention provides a sixth possible implementation of the first aspect, wherein the diameter of the second liquid flow channel is greater than the diameter of the perfusion needle.

[0012] In combination with the first aspect, an embodiment of the present invention provides a seventh possible implementation of the first aspect, wherein the first cavity is provided with a first liquid level sensor; the first liquid level sensor is used to measure the flow parameters at the outlet position of the first cavity.

[0013] In combination with the first aspect, an embodiment of the present invention provides an eighth possible implementation of the first aspect, wherein the second cavity is provided with a second liquid level sensor; the second liquid level sensor is used to measure the flow parameters at the outlet position of the second cavity.

[0014] In a second aspect, an embodiment of the present invention further provides a pressure regulation method, which is applied to the controlled pressure perfusion equipment described in the first aspect, wherein the controlled pressure perfusion equipment comprises a perfusion device and an air pressure regulation device matched with the perfusion device; the perfusion device comprises an infusion bottle, a first cavity, a second cavity and a perfusion needle connected in sequence through a liquid flow channel; the method comprises: the air pressure regulation device responds to an air pressure regulation operation; and the air pressure of the infusion bottle, the first cavity and the second cavity is adjusted according to the air pressure regulation operation to control the flow parameters of the liquid output from the perfusion needle.

[0015] The embodiments of the present invention bring the following beneficial effects:

[0016] The controlled pressure perfusion equipment and pressure regulation method provided in the embodiments of the present invention include a perfusion device and an air pressure regulation device matched with the perfusion device in the controlled pressure perfusion equipment, and the perfusion device includes an infusion bottle, a first cavity, a second cavity and a perfusion needle which are connected in sequence through a liquid flow channel, and the air pressure regulation device corresponds to the infusion bottle, the first cavity and the second cavity respectively, and is used to adjust the air pressure of the infusion bottle, the first cavity and the second cavity to control the flow parameters of the liquid output from the perfusion needle. At the same time, the pressure can be adjusted as needed through the air pressure regulation device, so as to keep the flow state of the liquid stable to avoid problems caused by unstable pressure.

[0017] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A structural block diagram of a controlled pressure perfusion device provided by an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the structure of a perfusion device provided by an embodiment of the present invention;

[0022] Figure 3 A flow chart of a pressure regulation method provided by an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the use of a pressure regulation method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0025] At present, conventional perfusion in surgery generally adopts controlled pressure perfusion. Taking ophthalmic surgery as an example, the liquid is injected into the eyeball by pressurizing the infusion bottle. However, due to the large volume of the infusion bottle, the pressure changes too slowly. In this way, when the suction flow rate changes rapidly, the pressure in the infusion bottle changes too slowly and cannot keep up with the suction change speed, making the intraocular pressure unstable, which in turn causes various problems and brings a bad experience to patients.

[0026] Based on this, a controlled pressure perfusion device and a pressure regulation method provided in an embodiment of the present invention can effectively alleviate the above technical problems.

[0027] To facilitate understanding of this embodiment, a controlled pressure perfusion device disclosed in an embodiment of the present invention is first introduced in detail.

[0028] In a possible implementation, an embodiment of the present invention provides a controlled pressure perfusion device. Specifically, the controlled pressure perfusion device includes a perfusion device and a gas pressure regulating device matched with the perfusion device.

[0029] For ease of understanding, Figure 1 A structural block diagram of a controlled pressure perfusion device is shown, Figure 1 As shown, a filling device 10 and a gas pressure regulating device 20 are shown.

[0030] Specifically, the perfusion device 10 includes an infusion bottle 101, a first cavity 102, a second cavity 103 and a perfusion needle 104 which are sequentially connected through a liquid flow channel.

[0031] Among them, a first liquid flow channel 105 is arranged between the infusion bottle 101 and the first cavity 102, and the first liquid flow channel 105 can connect and disconnect the infusion bottle 101 and the first cavity 102, that is, the first liquid flow channel can realize the liquid circulation between the infusion bottle 101 and the first cavity 102, for example, it can connect the infusion bottle 101 and the first cavity 102, and can also disconnect the connection state between the infusion bottle 101 and the first cavity 102.

[0032] Furthermore, a second liquid flow channel 106 is provided between the first cavity 102 and the second cavity 103, and the second liquid flow channel 106 can connect and disconnect the first cavity 102 and the second cavity 103; that is, the second liquid flow channel is similar to the first liquid flow channel, and can realize the liquid flow between the first cavity 102 and the second cavity 103, for example, it can connect the first cavity 102 and the second cavity 103, and can also disconnect the connection state between the first cavity 102 and the second cavity 103.

[0033] Furthermore, the liquid flow channel connected between the second cavity and the perfusion needle can be called the third liquid flow channel, and the above-mentioned air pressure regulating device 20 corresponds to the infusion bottle 101, the first cavity 102 and the second cavity 103 respectively, and is used to adjust the air pressure of the infusion bottle 101, the first cavity 102 and the second cavity 103 to control the flow parameters of the liquid output from the perfusion needle.

[0034] The controlled pressure perfusion equipment provided by the embodiment of the present invention includes a perfusion device and an air pressure regulating device matched with the perfusion device, and the perfusion device includes an infusion bottle, a first cavity, a second cavity and a perfusion needle which are connected in sequence through a liquid flow channel, and the air pressure regulating device corresponds to the infusion bottle, the first cavity and the second cavity respectively, and is used to adjust the air pressure of the infusion bottle, the first cavity and the second cavity to control the flow parameters of the liquid output from the perfusion needle. At the same time, the pressure can be adjusted as needed through the air pressure regulating device, so as to keep the flow state of the liquid stable to avoid problems caused by unstable pressure.

[0035] In actual use, in order to achieve air pressure regulation of the infusion bottle 101, the first cavity 102 and the second cavity 103, the above-mentioned air pressure regulation device includes an air pressure regulator and multiple air pressure regulation units connected to the air pressure regulator; wherein the air pressure regulator is used to respond to the air pressure regulation operation so as to adjust the air pressure of the infusion bottle, the first cavity and the second cavity respectively through the air pressure regulation unit.

[0036] In specific implementation, the above-mentioned air pressure regulator as a controller of the air pressure regulating device can respond to the air pressure regulating operation. Specifically, the controller can be connected to the operation control, and the operation control is for the medical staff to adjust. The controller generally includes a control circuit composed of a program counter, an instruction register, an instruction decoder, a timing generator and an operation controller, which can complete the air pressure regulation operation. For example, the air pressure regulation operation of the medical staff is to adjust the air pressure of at least one of the infusion bottle, the first cavity and the second cavity in response to the air pressure regulation operation, so that the flow parameters of the liquid finally output from the perfusion needle meet the actual use requirements.

[0037] Furthermore, the flow parameters of the liquid output by the perfusion needle generally include liquid flow rate and / or liquid flow rate. Taking ophthalmic surgery as an example, the liquid output by the perfusion needle can be directly perfused into the eye tissue, thereby achieving the purpose of controlling intraocular pressure.

[0038] Furthermore, the air pressure regulating unit includes a first air pressure regulating unit corresponding to the infusion bottle, a second air pressure regulating unit corresponding to the first cavity, and a third air pressure regulating unit corresponding to the second cavity.

[0039] For ease of understanding, Figure 1 On the basis of Figure 2 Also shown is a structural schematic diagram of a perfusion device, including an infusion bottle 101, a first cavity 102, a second cavity 103 and a perfusion needle 104, as well as a first air pressure regulating unit 201 corresponding to the infusion bottle 101, a second air pressure regulating unit 202 corresponding to the first cavity 102, and a third air pressure regulating unit 203 corresponding to the second cavity 103.

[0040] further, Figure 2 Also shown are a first liquid flow channel 105 , a second liquid flow channel 106 , and a third liquid flow channel 109 .

[0041] In specific implementation, the above-mentioned air pressure regulating unit is used to adjust the air pressure of the infusion bottle 101, the first cavity 102, and the second cavity 103 respectively, and in order to achieve the purpose of air pressure regulation, the air pressure regulating unit generally includes an air supply structure, an exhaust structure, and a regulating structure, etc.

[0042] Further, if Figure 2 As shown, the first liquid flow channel 105 is equipped with a first switch valve 105a; the first switch valve 105a is used to achieve the connection and disconnection between the infusion bottle and the first cavity, that is, the first switch valve is used to achieve the circulation and disconnection between the infusion bottle and the first cavity. Similarly, the second liquid flow channel 106 is equipped with a second switch valve 106a; the second switch valve 106a is used to achieve the connection and disconnection between the first cavity and the second cavity, that is, the second switch valve 106a is used to achieve the circulation and disconnection between the first cavity and the second cavity.

[0043] In actual use, according to actual use requirements, the volume of the second cavity is generally between 5 mL and 60 mL, and the volume of the first cavity is greater than the volume of the second cavity.

[0044] Furthermore, the diameter of the second liquid flow channel is generally larger than the diameter of the perfusion needle to meet the liquid flow requirements.

[0045] In addition, if Figure 2 The first cavity is also provided with a first liquid level sensor 107, which is used to measure the flow parameters at the outlet of the first cavity. The second cavity is also provided with a second liquid level sensor 108, which is used to measure the flow parameters at the outlet of the second cavity.

[0046] In actual use, the first liquid level sensor and the second liquid level sensor can measure the liquid flow rate and / or liquid flow rate of the corresponding outlet, and display the measured data for the user to view, and adjust the air pressure based on the data. In addition, the first liquid level sensor and the second liquid level sensor can also communicate with the air pressure regulator of the air pressure regulating device, transmit the measured data to the air pressure regulator, display it on the air pressure regulator, and enable the air pressure regulator to automatically adjust the air pressure based on the measured data. The specific data processing situation can be set according to the actual use situation, and the embodiment of the present invention does not limit this.

[0047] Furthermore, based on the above embodiments, an embodiment of the present invention also provides a pressure regulation method, which is applied to the controlled pressure perfusion equipment provided in the above embodiments, wherein the controlled pressure perfusion equipment includes a perfusion device and an air pressure regulating device matching the perfusion device; the perfusion device includes an infusion bottle, a first cavity, a second cavity and a perfusion needle which are connected in sequence through a liquid flow channel.

[0048] Specifically, Figure 3 A flow chart of a pressure regulation method is shown, the method comprising the following steps:

[0049] Step S302, the air pressure regulating device responds to the air pressure regulating operation;

[0050] Step S304: adjusting the air pressure of the infusion bottle, the first cavity, and the second cavity according to the air pressure adjustment operation to control the flow parameters of the liquid output from the perfusion needle.

[0051] In actual use, the above-mentioned pressure regulation method in the embodiment of the present invention is mostly used in surgery to perform perfusion treatment on the required tissue. For example, in ophthalmic surgery, the liquid bottle is injected into the eyeball by pressurizing, and the controlled pressure perfusion equipment is generally used in a mounted manner for infusion, that is, the perfusion device includes an infusion bottle, a first cavity, a second cavity and a perfusion needle which are mounted and connected in sequence from top to bottom.

[0052] For ease of understanding, Figure 4 A schematic diagram of a pressure regulation method is shown, and for ease of explanation, Figure 4 , which shows the connection between the first cavity, the second cavity and the perfusion needle, and a schematic diagram of the liquid circulation in the first cavity and the second cavity, wherein, for the convenience of explanation, Figure 4 In the figure, only the numbers of a few structures are shown in A.

[0053] Specific as Figure 4 As shown, the entire usage process is Figure 4 The ABCDE cycle in which Figure 4In the figure, the horizontal shaded area indicates that there is liquid at that location. Taking the example of injecting liquid into the eye during ophthalmic surgery, the following process is involved:

[0054] (1) The liquid in the first cavity and the second cavity of the perfusion device is Figure 4 In the state A, at this time, the first switch valve 105a is opened, the second switch valve 106a is closed, and the second cavity 103 is filled with liquid.

[0055] The third air pressure regulating unit 203 pushes the liquid from the second cavity 103 into the eye, and the liquid flow rate can be measured through the second liquid level sensor, and the liquid flow rate can also be measured. According to the demand for flow change, it can be fed back to the air pressure regulator to control the increase or decrease of the third air pressure regulating unit 203, so as to achieve the purpose of controlling intraocular pressure.

[0056] At the same time, the air pressure of the first cavity is set to atmospheric pressure or lower pressure, and the first air pressure regulating unit 201 pushes the liquid from the filling bottle (not shown in the figure 4) into the first cavity 102, and stops when the first liquid level sensor detects that the first cavity is full of liquid. Figure 4 As shown in B.

[0057] (2) When reaching Figure 4 As shown in B, the liquid in the second chamber will be exhausted. At this time, the first switch valve needs to be closed, and then the air pressure in the first chamber is set to be greater than the air pressure in the second chamber, and then the second switch valve is opened to enter Figure 4 The state shown in C.

[0058] at this time, Figure 4 In C, since the air pressure in the second cavity does not change and the pressure difference between the air pressure in the second cavity and the intraocular pressure does not change, the flow rate continues to be constant and the intraocular pressure does not change.

[0059] Because the air pressure in the first cavity is higher than that in the second cavity, and the second liquid flow channel is thicker than the perfusion needle, the flow rate will be faster than that in the perfusion needle. Therefore, the liquid in the first cavity is transferred to the second cavity under the action of the pressure difference and gradually fills up the second cavity. At the same time, by detecting the liquid level in the first cavity and the liquid level in the second cavity, their respective flow rates can be calculated. The difference between the two is the perfusion flow rate. The demand for flow rate changes is fed back to the air pressure regulator to adjust whether the air pressure in the second cavity increases or decreases, thereby achieving the purpose of controlling intraocular pressure. After maintaining this state for a period of time, the perfusion device enters Figure 4 The state shown in D.

[0060] (3) When the second cavity is almost full, close the second switch valve first, then adjust the second air pressure regulating unit 202 to make the air pressure in the first cavity to a lower level, and then open the first switch valve. Figure 4The state shown in E, that is, Figure 4 The initial state of A in .

[0061] In the above process, since the air pressure in the second cavity does not change, the pressure difference between the air pressure in the second cavity and the intraocular pressure does not change, so that the liquid flow and intraocular pressure will remain stable and will not jump, which greatly avoids the problems caused by unstable pressure.

[0062] In summary, the pressure regulation method provided in the embodiment of the present invention has the same technical features as the controlled pressure perfusion equipment provided in the above embodiment, so it can also solve the same technical problems and achieve the same technical effects.

[0063] The computer program product of the pressure regulation method provided in the embodiment of the present invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method described in the previous method embodiment. The specific implementation can be found in the method embodiment and will not be repeated here.

[0064] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0066] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0067] Finally, it should be noted that the above embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art can still modify the technical solutions recorded in the above embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A controlled pressure infusion device, characterized in that: The controlled pressure perfusion equipment comprises a perfusion device and a gas pressure regulating device matched with the perfusion device; The perfusion device comprises an infusion bottle, a first cavity, a second cavity and a perfusion needle which are sequentially connected through a liquid flow channel; Wherein, a first liquid flow channel is provided between the infusion bottle and the first cavity, and the first liquid flow channel can connect and disconnect the infusion bottle and the first cavity; A second liquid flow channel is provided between the first cavity and the second cavity, and the second liquid flow channel can connect and disconnect the first cavity and the second cavity; The air pressure regulating device corresponds to the infusion bottle, the first cavity and the second cavity respectively, and is used to adjust the air pressure of the infusion bottle, the first cavity and the second cavity to control the flow parameters of the liquid output from the perfusion needle.

2. The controlled pressure infusion device according to claim 1, characterized in that The air pressure regulating device comprises an air pressure regulator, and a plurality of air pressure regulating units connected to the air pressure regulator; The air pressure regulator is used to respond to the air pressure adjustment operation to adjust the air pressure of the infusion bottle, the first cavity and the second cavity respectively through the air pressure adjustment unit.

3. The controlled pressure infusion device according to claim 2, characterized in that: The air pressure regulating unit includes a first air pressure regulating unit corresponding to the infusion bottle, a second air pressure regulating unit corresponding to the first cavity, and a third air pressure regulating unit corresponding to the second cavity.

4. The controlled pressure infusion device according to claim 1, characterized in that: The first liquid flow channel is provided with a first switch valve; The first switch valve is used to realize the connection and disconnection between the infusion bottle and the first cavity.

5. The controlled pressure infusion device according to claim 1, characterized in that: The second liquid flow channel is provided with a second switch valve; The second switch valve is used to realize the connection and disconnection between the first cavity and the second cavity.

6. The controlled pressure infusion device according to claim 1, characterized in that The volume of the first cavity is greater than the volume of the second cavity.

7. The controlled pressure infusion device according to claim 1, characterized in that The diameter of the second liquid flow channel is greater than the diameter of the perfusion needle.

8. The controlled pressure infusion device according to claim 1, characterized in that The first cavity is provided with a first liquid level sensor; The first liquid level sensor is used to measure the flow parameters at the outlet position of the first cavity.

9. The controlled pressure infusion device according to claim 1, characterized in that: The second cavity is provided with a second liquid level sensor; The second liquid level sensor is used to measure the flow parameters at the outlet position of the second cavity.

10. A pressure regulation method, characterized in that: The controlled pressure perfusion device applied to any one of claims 1 to 9, the controlled pressure perfusion device comprising a perfusion device and a gas pressure regulating device matched with the perfusion device; The perfusion device comprises an infusion bottle, a first cavity, a second cavity and a perfusion needle which are sequentially connected through a liquid flow channel; The method comprises: The gas pressure regulating device is responsive to gas pressure regulating operation; The air pressure of the infusion bottle, the first cavity, and the second cavity is adjusted according to the air pressure adjustment operation to control the flow parameters of the liquid output from the perfusion needle.

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