CN113577415A

CN113577415A - Bladder irrigation drainage system and method with pressure regulation and control functions and capable of preventing backflow

Info

Publication number: CN113577415A
Application number: CN202111038261.9A
Authority: CN
Inventors: 孙杰; 金崇熙; 南莲花; 徐成学
Original assignee: Weihai Medison Medical Equipment Co ltd
Current assignee: Weihai Medison Medical Equipment Co ltd
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2021-11-02

Abstract

The invention discloses a bladder irrigation drainage system and a bladder irrigation drainage method with pressure regulation and control and backflow prevention, wherein the irrigation drainage system comprises a water inlet pipe, a drainage pipe and a three-cavity catheter, a water inlet cavity and a drainage cavity are arranged in the three-cavity catheter, the tail end of the three-cavity catheter is provided with a water inlet and a drainage port, the water inlet cavity and the drainage cavity are respectively communicated with the water inlet and the drainage port, and the water inlet cavity and the drainage cavity are respectively communicated with a water inlet interface and a drainage interface which are arranged at the other end of the three-cavity catheter; one end of the water inlet pipe is communicated with the controller, and the other end of the water inlet pipe is communicated with the water inlet cavity of the three-cavity catheter through the water inlet interface; one end of the water discharge pipe is communicated with the controller, and the other end of the water discharge pipe is communicated with the water discharge cavity of the three-cavity conduit pipe through the water discharge interface; the working method of the irrigation drainage system finishes the irrigation work on the bladder of the patient through a plurality of steps; the flushing drainage system provided by the invention is used for monitoring the pressure by the controller and controlling the inflow and the discharge of flushing liquid, so that the manual operation time in the whole process is saved, and the working efficiency is improved.

Description

Bladder irrigation drainage system and method with pressure regulation and control functions and capable of preventing backflow

Technical Field

The invention relates to a drainage system and a method, in particular to a bladder irrigation drainage system and a method with pressure regulation and control functions and capable of preventing backflow.

Background

The bladder irrigation drainage system is mainly used for the operation of bladder pathological changes. In clinical work, when a patient has certain bladder diseases (such as cystitis and bladder tumor), and foreign matters such as blood clots, mucus and bacteria exist in the bladder of the patient after bladder operation is performed on the patient, in order to prevent infection, the inner part of the bladder of the patient needs to be flushed. The bladder irrigation treatment is regular irrigation within a treatment course, and a catheter needs to be placed in the bladder of a patient for a long time, foreign bodies such as blood clots, mucus and bacteria cause the risk of blockage of the catheter in the bladder of the patient, so that the patient can feel uncomfortable and leak urine, the risk of urinary system infection of the patient is increased, and the bladder irrigation is needed at the moment. When the bladder is flushed, along with the injection of flushing liquid into the bladder, the liquid in the bladder is gradually increased, so that the pressure in the bladder is continuously increased, and when the pressure is increased to a certain degree, the reflux of the vesicoureteral can be caused, and the kidney function is influenced. Meanwhile, the liquid in the bladder can also enter the irrigation drainage system in a countercurrent manner to cause irrigation liquid pollution. In the process of bladder irrigation treatment, a doctor or a nurse is required to manually operate an irrigation process in the whole process, patients of different sexes and ages have different bladder volumes due to differences of individuals of the patients, the contrast between the irrigation liquid perfusion amount and the drainage amount, discomfort symptoms of the lower abdominal bladder of the patient and the control of the volume and the pressure of liquid in the bladder are required to be observed by the doctor or the nurse by naked eyes and communicated with the patient to feel urination in time, 3-4 processes are required to be repeated for each time of irrigation, the operation difficulty and the time cost of a bladder irrigation operator are increased, and the pressure of the irrigation liquid in the irrigation process is not controllable.

In order to solve the problems of the liquid backflow phenomenon existing in the bladder irrigation and infusion process, difficulty in controlling the pressure during irrigation and liquid infusion, high operation difficulty, high time cost and the like, a bladder irrigation and drainage system capable of regulating and controlling the irrigation pressure and preventing backflow is urgently needed.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides a bladder irrigation drainage system and a bladder irrigation drainage method with pressure regulation and prevention of backflow.

In order to solve the technical problems, the invention adopts the technical scheme that: a bladder irrigation drainage system with pressure regulation and control and backflow prevention comprises a water inlet pipe, a water outlet pipe, a controller and a three-cavity catheter, wherein an independent water inlet cavity and an independent water outlet cavity are arranged in the three-cavity catheter;

one end of the water inlet pipe is communicated with the controller, and the other end of the water inlet pipe is communicated with the water inlet cavity of the three-cavity catheter through the water inlet interface; one end of the drain pipe is communicated with the controller, and the other end of the drain pipe is communicated with the drain cavity of the three-cavity conduit through the drain interface.

The controller further comprises a pressure sensor, a control device, a water inlet control valve and a water discharge control valve, wherein one end of the water inlet pipe and one end of the water discharge pipe respectively penetrate through the controller, and the opening and closing of the pipelines of the water inlet pipe and the water discharge pipe are controlled by the water inlet control valve and the water discharge control valve respectively in the controller.

Furthermore, the water inlet pipe and the water discharge pipe are respectively provided with a water inlet valve and a water discharge valve, and the water inlet valve and the water discharge valve can be respectively and manually controlled to open and close the water inlet pipe and the water discharge pipe.

Furthermore, an independent balloon inflation cavity is arranged in the three-cavity catheter; the tail end of the balloon inflation cavity is communicated with a balloon which is arranged at a position adjacent to the water inlet and the water outlet; the balloon inflation cavity is communicated with a balloon inflation port at the other end of the three-cavity catheter.

Further, the sacculus is connected with an inflating injector through a sacculus inflating cavity and a sacculus inflating port.

The working method of the bladder irrigation drainage system with the pressure regulation and control functions and the prevention of the reverse flow comprises the following steps:

one end of the water inlet pipe and one end of the water outlet pipe are respectively communicated with the water inlet interface and the water outlet interface at one end of the three-cavity catheter through the water inlet valve and the water outlet valve to respectively form an inflow channel of the water inlet pipe, the water inlet valve, the water inlet interface, the water inlet cavity, the water inlet port and the bladder and an outflow channel of the bladder, the water outlet port, the water outlet cavity, the water outlet interface, the water outlet valve and the water outlet pipe;

when the bladder irrigation and drainage operation is carried out, firstly, irrigation liquid is accessed from an inlet pipe, an inlet valve and a drain valve are manually opened, the irrigation liquid enters an inflow channel and an outflow channel, air in the whole liquid channel is discharged, then the inlet valve and the drain valve are manually closed, the irrigation liquid in the inflow channel and the outflow channel stops flowing, then the tail end of a three-cavity catheter is inserted into the bladder of a patient, an inflation injector is used for pumping a certain volume of air into a balloon inflation inlet at the other end of the three-cavity catheter to enable the balloon to swell, one end of the three-cavity catheter is hung in the bladder of the patient, a controller is started, the inlet valve and the drain valve are manually opened, and because the initial pressure of the bladder irrigation and drainage system during starting does not reach a set pressure value at the moment, a control device respectively sends signals to the inlet control valve and the drain control valve to control the inlet control valve to be opened, the drainage control valve is closed, at the moment, a water inlet pipe, a water inlet valve, a water inlet interface, a water inlet cavity, a water inlet and a bladder liquid passage are in an open state, an outflow channel is in a closed state, a three-cavity catheter continuously conveys flushing liquid into the bladder of a patient, meanwhile, a pressure sensor and a control device in the controller continuously detect the pressure in the liquid passage, the pressure in the bladder and the pressure in the inflow channel of the patient are simultaneously increased along with the increase of the flushing liquid in the bladder of the patient, when the pressure in the bladder of the patient and the pressure in the liquid passage are increased to set pressure values, the control device respectively sends signals to the water inlet control valve and the drainage control valve to control the closing of the water inlet control valve, and the drainage control valve is continuously closed, so that the flushing liquid remained in the bladder of the patient keeps closed for a period of time, and the effects of flushing, disinfection and sterilization are achieved; when the specified retention time is reached, the control device respectively sends signals to the water inlet control valve and the water discharge control valve, the water inlet control valve is controlled to be kept closed, the water discharge control valve is opened, the outflow channel is opened at the moment, and waste liquid which has achieved the flushing and disinfecting effects in the bladder of the patient flows into the containing device connected with the water discharge pipe through the drainage pipe through the outflow channel; when the outflow channel discharges the waste liquid in the bladder, the pressure sensor continuously detects the continuously reduced pressure in the outflow channel, and when the pressure value is reduced to a specified value, the control device respectively sends signals to the water inlet control valve and the water discharge control valve to control the water inlet control valve to be opened and the water discharge control valve to be closed, at the moment, the inflow channel is opened, the flushing liquid enters the inflow channel from the water inlet pipe, and the flushing liquid is conveyed into the bladder; the above process is a single complete bladder irrigation and drainage process, and the process is repeated for three to four times to be a standard treatment of bladder irrigation once.

According to the bladder irrigation drainage system with the pressure regulation and control function and the backflow prevention function, the controller monitors the pressure and controls the inflow and the discharge of the irrigation liquid in the whole irrigation drainage process, so that the time of manual operation in the whole process is saved, the working efficiency is improved, the control of the pressure control and the disinfection retention time is more accurate, and the treatment safety and the comfort of a patient are improved; the controller monitors the pressure and controls the inflow and the discharge of the flushing liquid, so that the pressure of the liquid flowing into the passage is always controlled in a safe range, the inflow passage is closed in time when the pressure rises to a limit value, the problem that the pressure in the bladder possibly existing in the process of infusion of similar products in the prior art is not less than the pressure of the infusion, the phenomenon of backflow of the liquid in the bladder is caused is solved, the pollution of the backflow phenomenon to the flushing liquid is avoided, the urine leakage of a patient can be avoided, and the comfort of the patient is improved.

Drawings

Fig. 1 is a schematic view of the stationary state of the bladder irrigation drainage system with pressure regulation and prevention of reverse flow according to the present invention.

Fig. 2 is a schematic view of the operation state of the bladder irrigation drainage system with pressure regulation and prevention of reverse flow according to the present invention.

Fig. 3 is a schematic diagram of the bladder irrigation drainage system with pressure regulation and prevention of reverse flow according to the present invention.

Fig. 4 is a partially enlarged view of fig. 1 at B.

FIG. 5 is a schematic cross-sectional view A-A of the triple lumen catheter of FIG. 2.

Fig. 6 is a partially enlarged view of fig. 1 at B.

FIG. 7 is a schematic cross-sectional view A-A of the triple lumen catheter of FIG. 2.

In the figure: 1. a water inlet pipe; 2. a drain pipe; 3. a controller; 4. a water inlet valve; 5. a drain valve; 6. a three-lumen catheter; 61. a water inlet interface; 62. a water drainage interface; 63. a water inlet cavity; 64. a drainage cavity; 65. a water inlet; 66. a water outlet; 67. a balloon inflation port; 68. a balloon inflation lumen; 69. a balloon; 7. and (4) inflating the injector.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, a bladder irrigation drainage system with pressure regulation and control and backflow prevention comprises an inlet pipe 1, a drain pipe 2, a controller 3 and a three-cavity catheter 6, wherein the three-cavity catheter 6 is internally provided with an independent inlet cavity 63 and a drain cavity 64, the tail end of the three-cavity catheter 6 is provided with an independent inlet 65 and a separate outlet 66, the inlet cavity 63 and the drain cavity 64 extend in the three-cavity catheter, the tail ends of the inlet cavity 63 and the drain cavity 64 are respectively communicated with the inlet 65 and the outlet 66, and the inlet cavity 63 and the drain cavity 64 are respectively communicated with an inlet connector 61 and a drain connector 62 which are arranged at the other end of the three-cavity catheter 6;

one end of the water inlet pipe 1 is communicated with the controller 3, and the other end is communicated with a water inlet cavity 63 of the three-cavity catheter through a water inlet connector 61; one end of the water discharge pipe 2 is communicated with the controller 3, and the other end is communicated with a water discharge cavity 64 of the three-cavity conduit through a water discharge interface 62.

A working method of a bladder irrigation drainage system with pressure regulation and backflow prevention comprises the following steps:

one end of the water inlet pipe 1 and one end of the water outlet pipe 2 are respectively communicated with the water inlet interface 61 and the water outlet interface 62 at one end of the three-cavity conduit 6 through the water inlet valve 4 and the water outlet valve 5 to respectively form an inflow channel of the water inlet pipe 1, the water inlet valve 4, the water inlet interface 61, the water inlet cavity 63, the water inlet 65, the bladder and an outflow channel of the bladder, the water outlet 66, the water outlet cavity 64, the water outlet interface 62, the water outlet valve 5 and the water outlet pipe 2, the pressure sensor and the control device are connected into the water outlet pipe 2 and are communicated with the water outlet pipe 2, the pressure in the whole inflow and outflow channels is monitored in real time, and pressure data are uploaded to the control device for analysis;

when the bladder irrigation and drainage operation is carried out, firstly, the irrigation liquid is accessed from the water inlet pipe 1, the water inlet valve 4 and the water discharge valve 5 are manually opened, the irrigation liquid enters the inflow channel and the outflow channel to discharge the air in the whole liquid channel, then the water inlet valve 4 and the water discharge valve 5 are manually closed, the irrigation liquid in the inflow channel and the outflow channel stops flowing, then the tail end of the three-cavity catheter 6 is inserted into the bladder of a patient, a certain volume of air is injected into the balloon inflation inlet 67 at the other end of the three-cavity catheter 6 by using the inflation injector 7 to swell the balloon 69, one end of the three-cavity catheter 6 is hung in the bladder of the patient, the controller 3 is started, the water inlet valve 4 and the water discharge valve 5 are manually opened, because the initial pressure of the bladder irrigation and drainage system during starting does not reach the set pressure value far, the control device respectively sends signals to the water inlet control valve and the water discharge control valve, the water inlet control valve is controlled to be opened, the water discharge control valve is controlled to be closed, at the moment, the water inlet pipe 1, the water inlet valve 4, the water inlet interface 61, the water inlet cavity 63, the water inlet 65 and the bladder liquid passage are in an open state, the outflow channel is in a closed state, the three-cavity catheter 6 continuously conveys the flushing liquid into the bladder of the patient, while the pressure sensor and the control device inside the controller 3 continuously detect the pressure inside the fluid passage, the pressure inside the patient's bladder and the pressure inside the inflow channel increase simultaneously with the increase of the flushing fluid inside the patient's bladder, when the pressure in the bladder and the pressure in the liquid channel of the patient are increased to a set pressure value, the control device respectively sends signals to the water inlet control valve and the water discharge control valve to control the water inlet control valve to be closed, and the water discharge control valve is kept closed continuously, so that the flushing liquid remained in the bladder of the patient is kept for a period of time, and the effects of flushing, disinfecting and sterilizing are achieved; when the specified retention time is reached, the control device respectively sends signals to the water inlet control valve and the water discharge control valve, the water inlet control valve is controlled to be kept closed, the water discharge control valve is opened, the outflow channel is opened at the moment, and waste liquid which has already been subjected to the washing and disinfection effects in the bladder of the patient flows into the accommodating device connected with the drainage pipe 2 through the outflow channel; when the outflow channel discharges the waste liquid in the bladder, the pressure sensor continuously detects the continuously reduced pressure in the outflow channel, and when the pressure value is reduced to a specified value, the control device respectively sends signals to the water inlet control valve and the water discharge control valve to control the water inlet control valve to be opened and the water discharge control valve to be closed, at the moment, the inflow channel is opened, the flushing liquid enters the inflow channel from the water inlet pipe 1 again, and the flushing liquid is conveyed into the bladder; the above process is a single complete bladder irrigation and drainage process, and the process is repeated for three to four times to be a standard treatment of bladder irrigation once.

The first embodiment,

In the embodiment, the controller 3 comprises a pressure sensor, a control device, a water inlet control valve and a water discharge control valve, one ends of a water inlet pipe 1 and a water discharge pipe 2 respectively penetrate through the controller 3, and the opening and closing of the pipelines of the water inlet control valve and the water discharge control valve are respectively controlled by the water inlet control valve and the water discharge control valve in the controller 3.

Example II,

The utility model provides a possess pressure control and prevent bladder irrigation drainage system against current, is provided with into water valve 4, drainage valve 5 respectively on oral siphon 1, the drain pipe 2 in this embodiment, can be respectively to the switching of oral siphon, drainage valve manual control oral siphon, drain pipe.

Example III,

A bladder irrigation drainage system with pressure regulation and control and backflow prevention is disclosed, in the embodiment, a three-cavity catheter 6 is internally provided with an independent water inlet cavity 63, a water discharge cavity 64 and a balloon inflation cavity 68; the tail end of the balloon inflation cavity 68 is communicated with a balloon 69, and the balloon 69 is arranged at a position adjacent to the water inlet 65 and the water outlet 66; the balloon inflation cavity 68 is in turn in communication with a balloon inflation port 67 at the other end of the three-lumen catheter 6. The balloon 69 is connected with the inflation syringe 7 through the balloon inflation cavity 68 and the balloon inflation port 67. There are two arrangements of the water inlet chamber 63, water discharge chamber 64, and balloon inflation chamber 68, as shown in fig. 4-7.

Example four,

As shown in fig. 1 to 3, the bladder irrigation drainage system with pressure regulation and backflow prevention in the present embodiment comprises a water inlet pipe 1, a water outlet pipe 2, a controller 3, a water inlet valve 4, a water outlet valve 5, a three-cavity catheter 6, and an inflation syringe 7. The controller 3 mainly comprises a pressure sensor, a control device, a water inlet control valve and a water discharge control valve, wherein one end of the water inlet pipe 1 and one end of the water discharge pipe 2 penetrate through the controller 3 respectively, the opening and closing of the pipelines of the water inlet pipe 1 and the water discharge pipe 2 are controlled by the water inlet control valve and the water discharge control valve in the controller 3 respectively, the other ends of the water inlet pipe 1 and the water discharge pipe 2 are connected with one ends of the water inlet valve 4 and the water discharge valve 5 respectively, and the opening and closing of the water inlet pipe 1 and the water discharge pipe 2 can be controlled manually by the water inlet valve 4 and the water discharge valve 5 respectively.

The three-cavity catheter 6 mainly comprises a water inlet connector 61, a water discharge connector 62, a water inlet cavity 63, a water discharge cavity 64, a water inlet 65, a water discharge port 66, a balloon inflation port 67, a balloon inflation cavity 68 and a balloon 69, and the cross section of the three-cavity catheter 6 is shown in fig. 5 and respectively comprises three independent cavity channels of the water inlet cavity 63, the water discharge cavity 64 and the balloon inflation cavity 68. As shown in fig. 4, the end of the three-chamber conduit 6 is provided with an opening, which is an independent water inlet 65 and an independent water outlet 66, the water inlet chamber 63 and the water outlet chamber 64 extend to the end of the three-chamber conduit 6 and are respectively communicated with the water inlet 65 and the water outlet 66, and the water inlet chamber 63 and the water outlet chamber 64 are respectively communicated with the water inlet connector 61 and the water outlet connector 62 at the other end of the three-chamber conduit 6. The balloon 69 is arranged at a position adjacent to the water inlet 65 and the water outlet 66 and is communicated with the balloon inflation cavity 68, the balloon inflation cavity 68 is communicated with the balloon inflation port 67 at the other end of the three-lumen catheter 6, the balloon 69 is tightly attached to the outer wall of the catheter in a natural state, when the tail end of the three-lumen catheter 6 is inserted into the bladder of a patient through the urethra, the inflation syringe 7 is used for inflating the balloon inflation port 67, gas enters the balloon 69 through a channel between the balloon inflation port 67 and the balloon inflation cavity 68, the balloon 69 is inflated, and the inflated balloon 69 can be hung in the bladder of the patient to prevent the tail end of the three-lumen catheter 6 from falling out of the bladder of the patient as shown in fig. 3.

As shown in fig. 2, the other ends of the inlet pipe 1 and the outlet pipe 2 are respectively communicated with the inlet port 61 and the outlet port 62 at the other end of the three-cavity conduit 6 through the inlet valve 4 and the outlet valve 5, so as to respectively form an inlet passage of the inlet pipe 1, the inlet valve 4, the inlet port 61, the inlet cavity 63, the inlet port 65, the bladder 8 and an outlet passage of the bladder 8, the outlet port 66, the outlet cavity 64, the outlet port 62, the outlet valve 5, and the outlet pipe 2, and the pressure sensor and the control device are connected to the outlet pipe 2 and are communicated with the outlet pipe 2, so that the pressure in the whole inlet and outlet passages is monitored in real time, and pressure data is uploaded to the control device for analysis. When the bladder irrigation and drainage operation is carried out, firstly, the irrigation liquid is accessed from the water inlet pipe 1, the water inlet valve 4 and the water discharge valve 5 are manually opened, the irrigation liquid enters the inflow channel and the outflow channel to discharge the air in the whole liquid channel, then the water inlet valve 4 and the water discharge valve 5 are manually closed, the irrigation liquid in the inflow channel and the outflow channel stops flowing, then one end of the three-cavity catheter 6 is inserted into the bladder of a patient, a certain volume of air is injected into the balloon inflation inlet 67 at the other end of the three-cavity catheter 6 by using the inflation injector 7 to enable the balloon 69 to be inflated, one end of the three-cavity catheter 6 is hung in the bladder of the patient, the controller 3 is started, the water inlet valve 4 and the water discharge valve 5 are manually opened, and because the initial pressure of the bladder irrigation and drainage system for starting at the moment does not reach the set pressure value far, the control device respectively sends signals to the water inlet control valve and the water discharge control valve, controlling the water inlet control valve to be opened, closing the water discharge control valve, keeping the water inlet pipe 1, the water inlet valve 4, the water inlet interface 61, the water inlet cavity 63, the water inlet 65 and the bladder liquid passage in an open state, keeping the outflow channel in a closed state, continuously delivering the flushing liquid into the bladder of the patient by the three-cavity catheter 6, continuously detecting the pressure in the liquid passage by a pressure sensor and a control device in the controller 3, simultaneously increasing the pressure in the bladder and the inflow channel of the patient along with the increase of the flushing liquid in the bladder of the patient, sending signals to the water inlet control valve and the water discharge control valve by the control device respectively when the pressure in the bladder and the liquid passage of the patient is increased to a set pressure value, controlling the water inlet control valve to be closed, keeping the water discharge control valve to be closed continuously, keeping the liquid remained in the bladder of the patient for a period of time, and achieving the effects of flushing, disinfecting and sterilizing, when the specified retention time is reached, the control device respectively sends signals to the water inlet control valve and the water discharge control valve, the water inlet control valve is controlled to be kept closed, the water discharge control valve is opened, the outflow channel is opened, and waste liquid which has been subjected to the washing and disinfection effects in the bladder of the patient flows into a containing device (not shown in the figure) connected with the drainage pipe 2 through the outflow channel. When the outflow channel discharges the waste liquid in the bladder, the pressure sensor continuously detects the continuously reduced pressure in the channel, and when the pressure value is reduced to a specified value, the control device respectively sends signals to the water inlet control valve and the water discharge control valve, controls the water inlet control valve to be opened, controls the water discharge control valve to be closed, and then opens the inflow channel, and then the flushing liquid enters the inflow channel from the water inlet pipe 1 to convey the flushing liquid into the bladder. The above procedure is a single complete bladder irrigation drainage procedure, which is typically repeated three to four times for a standard treatment of one bladder irrigation.

Because the operation of inputting and discharging liquid in the whole flushing and drainage flow is to monitor the pressure and control the inflow and the discharge of the flushing liquid by the controller 3, the time of the whole manual operation is saved, the working efficiency is improved, the control of the pressure control and the disinfection retention time is more accurate, and the safety of treatment and the comfort of a patient are improved; the controller 3 monitors the pressure and controls the inflow and the discharge of the flushing liquid, so that the pressure of the liquid flowing into the passage is always controlled in a safe range, the inflow passage is closed in time when the pressure rises to a limit value, the problem that the pressure in the bladder possibly existing in the process of infusion of similar products in the prior art is not less than the pressure of the infusion, the phenomenon of backflow of the liquid in the bladder is caused is solved, the pollution of the backflow phenomenon to the flushing liquid is avoided, the occurrence of urine leakage of a patient can be avoided, and the comfort of the patient is improved.

The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.

Claims

1. A bladder irrigation drainage system with pressure regulation and backflow prevention is characterized in that: the water inlet pipe comprises a water inlet pipe (1), a water outlet pipe (2), a controller (3) and a three-cavity pipe (6), wherein an independent water inlet cavity (63) and a water outlet cavity (64) are arranged in the three-cavity pipe (6), the tail end of the three-cavity pipe (6) is provided with an independent water inlet (65) and a water outlet (66), the water inlet cavity (63) and the water outlet cavity (64) extend in the three-cavity pipe, the tail ends of the water inlet cavity and the water outlet cavity are respectively communicated with the water inlet (65) and the water outlet (66), and the water inlet cavity (63) and the water outlet cavity (64) are respectively communicated with a water inlet connector (61) and a water outlet connector (62) which are arranged at the other end of the three-cavity pipe (6);

one end of the water inlet pipe (1) is communicated with the controller (3), and the other end of the water inlet pipe is communicated with a water inlet cavity (63) of the three-cavity catheter through a water inlet interface (61); one end of the drain pipe (2) is communicated with the controller (3), and the other end of the drain pipe is communicated with a drain cavity (64) of the three-cavity conduit pipe through a drain connector (62).

2. The bladder irrigation drainage system with pressure regulation and prevention of reflux as claimed in claim 1 wherein: the controller (3) comprises a pressure sensor, a control device, a water inlet control valve and a water discharge control valve, wherein one ends of the water inlet pipe (1) and the water discharge pipe (2) respectively penetrate through the controller (3) and are respectively controlled by the water inlet control valve and the water discharge control valve to open and close the pipelines in the controller (3).

3. The bladder irrigation drainage system with pressure regulation and prevention of reflux as claimed in claim 1 wherein: and the water inlet pipe (1) and the water outlet pipe (2) are respectively provided with a water inlet valve (4) and a water outlet valve (5), and the water inlet valve and the water outlet valve can be respectively and manually controlled to be opened and closed.

4. The bladder irrigation drainage system with pressure regulation and prevention of reflux as claimed in claim 1 wherein: an independent balloon inflation cavity (68) is arranged in the three-cavity catheter (6); the tail end of the balloon inflation cavity (68) is communicated with a balloon (69), and the balloon (69) is arranged at a position adjacent to the water inlet (65) and the water outlet (66); the balloon inflation cavity (68) is communicated with a balloon inflation port (67) at the other end of the three-cavity catheter (6).

5. The bladder irrigation drainage system with pressure regulation and prevention of reflux as claimed in claim 4, wherein: the balloon (69) is connected with the inflation injector (7) through a balloon inflation cavity (68) and a balloon inflation port (67).

6. A method of operating the bladder irrigation drainage system with pressure regulation and prevention of reflux according to claims 1-5, characterized in that: the method comprises the following steps:

one end of the water inlet pipe (1) and one end of the water outlet pipe (2) are respectively communicated with a water inlet interface (61) and a water outlet interface (62) at one end of the three-cavity catheter (6) through a water inlet valve (4) and a water outlet valve (5) to respectively form a water inlet pipe (1) -the water inlet valve (4) -the water inlet interface (61) -a water inlet cavity (63) -a water inlet (65) -an inflow channel and a bladder-water outlet (66) -a water outlet cavity (64) -a water outlet interface (62) -a water outlet valve (5) -an outflow channel of the water outlet pipe (2), a pressure sensor and a control device are connected to the water outlet pipe (2), the pressure sensor is communicated with the water outlet pipe (2), the pressure in the whole inflow channel and the whole outflow channel is monitored in real time, and pressure data are uploaded to the control device for analysis;

when the bladder irrigation drainage operation is carried out, firstly, irrigation liquid is accessed from a water inlet pipe (1), a water inlet valve (4) and a water discharge valve (5) are manually opened, the irrigation liquid enters an inflow channel and an outflow channel to discharge air in the whole liquid channel, then the water inlet valve (4) and the water discharge valve (5) are manually closed, the irrigation liquid in the inflow channel and the outflow channel stops flowing, then the tail end of a three-cavity catheter (6) is inserted into the bladder of a patient, a certain volume of air is injected into a balloon inflation port (67) at the other end of the three-cavity catheter (6) by using an inflation injector (7) to enable a balloon (69) to be inflated, one end of the three-cavity catheter (6) is hung in the bladder of the patient, a controller (3) is started, the water inlet valve (4) and the water discharge valve (5) are manually opened, and the initial pressure of the bladder irrigation drainage system at the moment does not reach a set pressure value, the control device sends signals to the water inlet control valve and the water discharge control valve respectively to control the water inlet control valve to be opened and the water discharge control valve to be closed, at the moment, the water inlet pipe (1) -the water inlet valve (4) -the water inlet interface (61) -the water inlet cavity (63) -the water inlet (65) -the bladder liquid passage is in an open state, the outflow channel is in a closed state, the three-cavity catheter (6) continuously conveys the flushing liquid into the bladder of the patient, meanwhile, the pressure sensor and the control device in the controller (3) continuously detect the pressure in the liquid passage, the pressure in the bladder of the patient and the pressure in the inflow channel simultaneously rise along with the increase of the flushing liquid in the bladder of the patient, when the pressure in the bladder of the patient and the pressure in the liquid passage rise to the set pressure values, the control device sends signals to the water inlet control valve and the water discharge control valve respectively to control the water inlet control valve and control the water discharge control valve to be continuously closed, the flushing liquid remained in the bladder of the patient is kept for a period of time, so as to achieve the effects of flushing, disinfecting and sterilizing; when the specified retention time is reached, the control device respectively sends signals to the water inlet control valve and the water discharge control valve, the water inlet control valve is controlled to be kept closed, the water discharge control valve is opened, the outflow channel is opened at the moment, and waste liquid which has already achieved the flushing and disinfecting effects in the bladder of the patient flows into the accommodating device connected with the drainage pipe (2) through the outflow channel; when the outflow channel discharges waste liquid in the bladder, the pressure sensor continuously detects the continuously reduced pressure in the outflow channel, when the pressure value is reduced to a specified value, the control device respectively sends signals to the water inlet control valve and the water discharge control valve, the water inlet control valve is controlled to be opened, the water discharge control valve is controlled to be closed, the inflow channel is opened at the moment, the flushing liquid enters the inflow channel from the water inlet pipe (1) again, and the flushing liquid is conveyed into the bladder; the above process is a single complete bladder irrigation and drainage process, and the process is repeated for three to four times to be a standard treatment of bladder irrigation once.