CN216703071U

CN216703071U - Peritoneal dialysis system

Info

Publication number: CN216703071U
Application number: CN202121200360.8U
Authority: CN
Inventors: 潘力; 马健东
Original assignee: VR Medical Technology Co Ltd
Current assignee: VR Medical Technology Co Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-06-10
Anticipated expiration: 2031-05-31

Abstract

The embodiment of the utility model discloses a peritoneal dialysis system, which comprises: at least one liquid supply bag for supplying dialysate to abdominal cavity of human body; at least one liquid supply pipeline for guiding dialysate of the liquid supply bag into the abdominal cavity of the human body, wherein one end of the liquid supply pipeline is connected with the liquid supply bag, and the other end of the liquid supply pipeline is connected with a preset pipe in the abdominal cavity of the human body; at least one drainage pipeline for guiding the waste liquid of the abdominal cavity of the human body out of the body, wherein one end of the drainage pipeline is connected with the preset pipe, the other end of the drainage pipeline is a liquid drainage end, and the height of the liquid drainage end from the ground is L4; the drainage pipeline is further connected with a negative pressure generating unit, and the negative pressure generating unit can form a low pressure point at a preset position of the drainage pipeline so as to increase the pressure difference between one end of the drainage pipeline, which is connected with the preset pipe, and the low pressure point. The utility model can be used for carrying out a complete peritoneal dialysis process, and has the advantages of low noise in the working process, low energy consumption, simple structure and low material cost.

Description

Peritoneal dialysis system

Technical Field

The utility model relates to the technical field of peritoneal dialysis equipment, in particular to a peritoneal dialysis system.

Background

Peritoneal Dialysis (PD) is to regularly and regularly inject prepared dialysate into the peritoneal cavity of a patient through a catheter by utilizing the characteristic that the peritoneum is used as a semi-permeable membrane, and because the concentration gradient difference of solutes exists at two sides of the peritoneum, the solute at one side with high concentration moves to the other side with low concentration (diffusion effect); the water moves from the hypotonic side to the hypertonic side (osmosis). The peritoneal dialysis solution is continuously replaced to achieve the purposes of removing in vivo metabolites and toxic substances and correcting water and electrolyte balance disorder. Most of peritoneal dialysis (peritoneal dialysis for short) patients in China are ambulatory continuous peritoneal dialysis (CAPD) patients. CAPD requires 3-4 exchanges of peritoneal dialysis fluid daily, which seriously affects the normal working life of the patient.

With the continuous improvement of the economic level of China and the pursuit of the freedom of life of patients, the selection of more expensive Automatic Peritoneal Dialysis (APD) treatment becomes a new trend. APD broadly refers to all treatments performed by automated machines instead of manually performing a peritoneal dialysis procedure. It can be divided into 4 modes of Nighttime Intermittent Peritoneal Dialysis (NIPD), Intermittent Peritoneal Dialysis (IPD), Continuous Cycle Peritoneal Dialysis (CCPD) and Tidal Peritoneal Dialysis (TPD). Among these 4 modes, NIPD is performed only at night, the patient is in a dry abdominal state during the day, the number of dialysis connection operations is minimized, and the degree of freedom provided to the patient is maximized, which is the most common APD mode.

The present invention relates to an improved Automated Peritoneal Dialysis (APD) system for clinical treatment including parenteral fluid administration in peritoneal dialysis, which is suitable for patients with acute renal failure, patients with chronic renal failure, patients with acute drug poisoning and patients with severe edema, water poisoning and heart failure due to any cause, etc.

Currently, there are two types of peritoneal dialysis apparatuses known, a powered peritoneal dialysis machine and a gravity type peritoneal dialysis machine. Wherein, the power type peritoneal dialysis machine utilizes a power method to convey the peritoneal dialysis solution to the peritoneal dialysis machine, the peritoneal dialysis solution is heated by the peritoneal dialysis machine and conveyed to the abdominal cavity of a patient, and the peritoneal dialysis solution is drained into a waste liquid device after the peritoneal dialysis solution is subjected to retention and dialysis exchange.

Gravity type peritoneal dialysis machine utilizes gravity method, and liquid is by the characteristic that the height flows to low, realizes that peritoneal dialysis liquid flows to the peritoneal dialysis machine from the high point, irritates into patient's peritoneal cavity through the heating of peritoneal dialysis machine, through the mode of remaining drainage in the waste liquid collection device behind the peritoneal dialysis.

However, the conventional power peritoneal dialysis machine and gravity peritoneal dialysis machine have the following problems:

the existing gravity type peritoneal dialysis machine is not beneficial to fully discharging dialysate in an abdominal cavity by only depending on height difference for drainage;

a second, prior art powered peritoneal dialysis machine employs at least one pump that is hydraulically operated to accomplish the inflow of fluid to, or the outflow of fluid from, the patient's peritoneal cavity. That is, in the conventional power type peritoneal dialysis machine, the liquid pump works continuously, and the power generated by the pump participates in the process of the whole liquid flowing into the abdominal cavity of the patient and also participates in the process of the whole liquid flowing out of the abdominal cavity of the patient.

Automated Peritoneal Dialysis (APD) therapy is often performed at night, and the operation of the pump can produce noise that can affect the rest of the patient. Moreover, the pump works continuously, and the energy consumption is higher.

Thirdly, the steps of: the existing power peritoneal dialysis machine has the defects that when liquid is injected and waste liquid is drained, the instantaneous pressure is high, and the discomfort or pain of a patient is easily caused.

Fourthly: the existing power type peritoneal dialysis machine and the gravity type peritoneal dialysis machine have large volume and are inconvenient to carry.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a peritoneal dialysis system which can perform a complete peritoneal dialysis process and has the advantages of low noise in the working process, low energy consumption, simple structure and low material cost.

In order to solve the above technical problem, an embodiment of the present invention provides a peritoneal dialysis system, including:

at least one liquid supply bag for supplying dialysate to the abdominal cavity of the human body, wherein the height of the liquid supply bag from the ground is L1, and the height of the abdominal cavity of the human body from the ground is L2;

at least one liquid supply pipeline for guiding dialysate of the liquid supply bag into the abdominal cavity of the human body, wherein one end of the liquid supply pipeline is connected with the liquid supply bag, and the other end of the liquid supply pipeline is connected with a preset pipe in the abdominal cavity of the human body;

at least one drainage pipeline for guiding the waste liquid of the abdominal cavity of the human body out of the body, wherein one end of the drainage pipeline is connected with the preset pipe, the other end of the drainage pipeline is a liquid drainage end, and the height of the liquid drainage end from the ground is L4;

the liquid supply bag is supported on the bearing platform, so that L1 is higher than L2, and the power for introducing the dialysate of the liquid supply bag into the abdominal cavity of the human body is provided by the height difference between L1 and L2;

the height of the liquid discharge end of the drainage pipeline is lower than that of the abdominal cavity of the human body, and the power for discharging the dialysate in the abdominal cavity of the human body is provided by the height difference between L2 and L4;

the drainage pipeline is further connected with a negative pressure generating unit, and the negative pressure generating unit can form a low pressure point at a preset position of the drainage pipeline so as to increase the pressure difference between one end of the drainage pipeline, which is connected with the preset pipe, and the low pressure point.

As an improvement of the scheme, the liquid discharging end of the drainage pipeline is arranged in a waste liquid barrel, and the waste liquid barrel is borne on the second weighing unit.

As an improvement of the above scheme, the second weighing unit can monitor the weight change of the waste liquid barrel in real time to obtain the real-time flow of the drainage pipeline;

when the real-time flow of the drainage pipeline is smaller than a preset value, starting the negative pressure generating unit;

and when the real-time flow of the drainage pipeline is greater than or equal to a preset value, stopping the negative pressure generating unit.

when the weight of the dialysate in the waste liquid barrel does not reach a preset value and the real-time flow of the drainage pipeline is smaller than the preset value, starting the negative pressure generating unit;

As an improvement of the above scheme, the negative pressure generating unit comprises a negative pressure cavity and a negative pressure generator connected with the negative pressure cavity, and the negative pressure cavity is arranged on the drainage pipeline;

after the negative pressure generator is started and the negative pressure cavity reaches the specified pressure, the negative pressure generator stops working;

the liquid of the drainage pipeline continuously flows into the negative pressure cavity under the pressure of the negative pressure cavity, and the liquid of the negative pressure cavity continuously flows out under the action of gravity, so that the negative pressure cavity is maintained within a preset pressure range.

As an improvement of the above scheme, the negative pressure generator comprises a shell, an air inlet and an air outlet are arranged on the shell, and a negative pressure pump, a water filtering valve and a pressure release valve are arranged in the shell;

the negative pressure cavity is connected with an air inlet of the negative pressure generator through a negative pressure interface end so as to apply variable negative pressure to the negative pressure cavity.

As an improvement of the above, the peritoneal dialysis system further comprises:

the height of the replenishing medicine bag from the ground is L3, and the dialysate is replenished by controlling the height difference between L3 and L1;

the last medicine bag is used for providing and reserving the dialysate in the abdominal cavity of the human body, the height of the last medicine bag from the ground is L3, and the supplement of the last liquid medicine is realized by controlling the height difference between L3 and L1.

As an improvement of the above scheme, the liquid supply pipeline and the drainage tube are provided by a consumable box; the consumable cartridge includes:

a body end pipeline for connecting with the abdominal cavity of the human body;

a rear end drainage pipeline for connecting with the waste liquid collecting device;

a front end liquid supply pipeline connected with the liquid supply bag;

a supplement pipeline connected with the supplement medicine bag;

a last tubing for connection to a last fluid bag;

the body end pipeline, the drainage pipeline, the liquid supply pipeline, the supplement pipeline and the last pipeline are arranged side by side and connected through medical pipe clamps to form an intercommunicating pipeline.

As an improvement of the scheme, the front-end liquid supply pipeline and the human body end pipeline form the liquid supply pipeline, and the human body end pipeline and the rear-end drainage pipeline form the drainage pipeline.

As an improvement of the scheme, the consumable box is provided with an exhaust unit for exhausting bubbles carried by the introduced liquid.

As an improvement of the scheme, the dialysis machine further comprises a positive pressure generating unit which is a liquid bag extruding device and is used for extruding the liquid bag and providing positive pressure for dialysate in the liquid bag to be injected.

As an improvement of the scheme, a first weighing unit is arranged on the bearing platform.

As an improvement of the scheme, the bearing platform is provided with a heating unit.

The embodiment of the utility model has the following beneficial effects:

1. in the process of injection and drainage, the gravitational potential energy of the liquid is mainly used as power, so that the liquid flows into a human body or flows out of the human body, the power consumption of the product is reduced, the volume of the product is small, the cost is reduced, and the burden of a user is reduced.

2. The application provides a negative pressure generating unit, simple structure has effectively reduced energy consumption, the silence of product, negative pressure generating unit can carry out intermittent type nature intervention when drainage start-up or drainage in-process when drainage pipeline's flow is less than the default, produces an extra appeal with liquid suction in drainage pipeline to guarantee that the liquid in the abdominal cavity can discharge rapidly and thoroughly.

3. The application provides a consumptive material box, including human body end pipeline, drainage pipeline, liquid supply pipeline, human body end pipeline, drainage pipeline, liquid supply pipeline set up side by side, form the intercommunication pipeline between human body end pipeline, drainage pipeline, the liquid supply pipeline. The utility model adopts the pipelines which are designed side by side instead of the labyrinth pipelines, thereby greatly simplifying the fluid flow path, simplifying the structure of the consumable box and further reducing the manufacturing cost and the maintenance cost of the consumable box. Moreover, the consumable box is convenient to use and long in service life, and is beneficial to reducing the cost of peritoneal dialysis treatment and benefiting patients.

4. The bearing platform is provided with the heating unit, so that the liquid supply bag borne on the bearing platform can be heated to a preset temperature and continuously insulated, and the trouble of heating the liquid supply bag in advance and insulating the liquid supply bag in the infusion process is avoided. The dislysate input and output process of this embodiment mainly is implemented as power through the difference in height of the flowing back end of confession liquid bag, human abdominal cavity and drainage tube, and whole process is steady and quiet, can improve patient's peritoneal dialysis greatly and experience. In this embodiment, the weight change of the liquid supply bag supported on the supporting platform is monitored through the first weighing unit, the implementation flow supplied to the abdominal cavity of the human body is calculated, when the flow rate of the liquid flowing into the abdominal cavity of the human body from the liquid supply bag is lower than a preset value, the negative pressure generating unit is involved, the liquid supply pressure is increased in a short time, various obstacles possibly generated in the perfusion process are solved, the dialysate can timely and sufficiently flow into the abdominal cavity, and the curative effect of peritoneal dialysis is ensured.

Drawings

Fig. 1 and 2 are schematic diagrams of a first embodiment of a peritoneal dialysis system of the present invention;

FIG. 3 is a schematic perspective view of a peritoneal dialysis system according to a second embodiment of the present invention;

FIG. 4 is a front view of a peritoneal dialysis system according to a second embodiment of the present invention;

FIG. 5 is a schematic view of a prior art drainage curve;

FIG. 6 is a schematic view of the drainage curve of the present invention;

FIG. 7 is a schematic view of the construction of the consumable cartridge of the present invention;

FIG. 8 is a schematic view of an exploded structure of the consumable cartridge of the present invention;

FIG. 9 is a schematic structural view of the negative pressure generator of the present invention;

FIG. 10 is a cross-sectional view of the negative pressure generator of the present invention;

FIG. 11 is an exploded view of an APD host according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. It is only noted that the utility model is intended to be limited to the specific forms set forth herein, including any reference to the drawings, as well as any other specific forms of embodiments of the utility model.

Example 1

As shown in fig. 1, a first embodiment of the present invention provides a peritoneal dialysis system comprising:

at least one liquid supply bag 1 for supplying dialysate to the human abdominal cavity 2, wherein the height of the liquid supply bag 1 from the ground is L1, and the height of the human abdominal cavity 2 from the ground is L2;

at least one liquid supply pipeline 10 for guiding the dialysate of the liquid supply bag 1 into the abdominal cavity 2 of the human body, wherein one end of the liquid supply pipeline 10 is connected with the liquid supply bag 1, and the other end is connected with a preset pipe in the abdominal cavity 2 of the human body; the preset tube is pre-placed into the abdominal cavity of a patient in an operation mode by a doctor.

At least one drainage pipeline 20 for guiding the waste liquid of the human abdominal cavity 2 out of the body, wherein one end of the drainage pipeline 20 is connected with the preset pipe, the other end is a liquid discharge end 41, and the height of the liquid discharge end 41 from the ground is L4;

the liquid supply bag 1 is supported on the bearing platform 9, so that L1 is higher than L2, and the power for introducing the dialysate of the liquid supply bag 1 into the abdominal cavity 2 of the human body is provided by the height difference between L1 and L2;

the height of the drainage end 41 of the drainage pipeline 20 is lower than the height of the human abdominal cavity 2, and the power for the dialysate in the human abdominal cavity 2 to be discharged out of the human body is provided by the height difference between L2 and L4;

the drainage pipeline 20 is further connected with a negative pressure generating unit 4, and the negative pressure generating unit 4 can form a low pressure point at a preset position of the drainage pipeline 20 so as to increase the pressure difference between one end of the drainage pipeline 20, which is connected with the preset pipe, and the low pressure point.

With the present embodiment, various therapies for peritoneal dialysis can be achieved: including CCPD, IPD, TPD. Which comprises the following steps:

1. injecting: the liquid medicine is injected from the liquid supply bag 1 into the peritoneum of the human body by using the height difference between L1 and L2.

2. Drainage: the abdominal cavity liquid in the human peritoneum is led out of the body through the drainage pipeline 20 by utilizing the height difference of the L2 and the L4. When the flow of flow drainage pipeline 20 was low excessively in drainage start-up and drainage in-process, negative pressure generating unit 4 began to work, through the increase drainage pipeline 20 is connected preset the pipe one end with the pressure differential between the low pressure point to promote the abdominal cavity liquid in the human peritoneum and outwards discharge through drainage pipeline 20, avoid because the structural change of human abdominal cavity 2, the position of the preset pipe of putting into in the human abdominal cavity 2 or the influence of the gesture of lying of the human body, cause liquid discharge not smooth in the human abdominal cavity 2. In order to ensure the safety of the user, the maximum negative pressure of the negative pressure generating unit 4 is 10 kPa.

The system has the following advantages:

2. The negative pressure generating unit 4 can intermittently intervene when the flow of the drainage pipeline 20 is smaller than a preset value when drainage is started or in the drainage process, and generates an extra suction force for sucking out liquid in the drainage pipeline 20 so as to ensure that the liquid in the abdominal cavity can be quickly and thoroughly discharged.

Referring to fig. 2, as a preferred embodiment of the present embodiment, the drainage end 41 of the drainage line 20 is disposed in the waste liquid barrel 3, and the waste liquid barrel 3 is supported on the second weighing unit 57. The second weighing unit 57 can monitor the weight change of the waste liquid barrel 3 in real time to obtain the real-time flow of the drainage pipeline 20; when the real-time flow of the drainage pipeline 20 is smaller than a preset value, starting the negative pressure generating unit 4; and when the real-time flow of the drainage pipeline 20 is greater than or equal to a preset value, stopping the negative pressure generating unit 4. When the negative pressure generating unit 4 stops working, the drainage pipeline 20 continuously discharges the liquid from the human body by the suction force generated by the weight of the liquid in the pipeline again. The flow monitoring method has the advantages of simple structure and reliable work, and can provide a quiet dialysis environment for a patient and provide a high-quality dialysis treatment course by matching with the negative pressure generating unit 4.

As a more intelligent solution, the negative pressure generating unit 4 can be started only when the weight of the dialysate in the waste liquid tank 3 does not reach the preset value and the real-time flow of the drainage line 20 is smaller than the preset value. This preset value represents the expected weight of the waste tank at the completion of dialysis. And when the weight of the dialysate in the waste liquid barrel 3 reaches a preset value or the real-time flow of the drainage pipeline 20 is greater than or equal to the preset value, stopping the negative pressure generating unit 4. In the scheme, the current weight of the waste liquid barrel 3 is added as the starting and stopping conditions of the negative pressure generating unit 4, when the current weight of the waste liquid barrel 3 reaches a preset value, the liquid in the abdominal cavity is fully discharged, the negative pressure generating unit 4 is not started at the moment, the liquid in the abdominal cavity continues to slowly flow out by virtue of gravity, and discomfort caused by the intervention of the negative pressure generating unit 4 when the liquid in the abdominal cavity is basically discharged is avoided.

Example 2

As shown in fig. 3, according to the second embodiment of the present invention, compared to the first embodiment, the present embodiment introduces the consumable box 6, and proposes specific structures of the consumable box 6 and the negative pressure generating unit 4, and the external pipeline of the present solution is connected to the consumable box 6 and belongs to a part of the consumable box 6. Since the consumable box 6 is introduced in the present embodiment, the front end liquid supply pipeline 101 connecting the liquid supply bag 1 and the consumable box 6 and the human body end pipeline 30 connecting the human body abdominal cavity 2 and the consumable box 6 in the present embodiment constitute the liquid supply pipeline 10 in the first embodiment; the body end pipeline 30 connecting the abdominal cavity 2 and the consumable box 6 in this embodiment, and the rear end drainage pipeline 201 connecting the consumable box 6 and the drainage end 41 constitute the drainage pipeline 20 in the first embodiment.

Specifically, a second embodiment of the present invention provides a peritoneal dialysis system comprising:

at least one liquid supply pipeline 10 for guiding dialysate of the liquid supply bag 1 into the human body abdominal cavity 2, wherein the liquid supply pipeline 10 comprises a front end liquid supply pipeline 101 for connecting the liquid supply bag 1 and the consumable box 6 and a human body end pipeline 30 for connecting the human body abdominal cavity 2 and the consumable box 6; a preset pipe is arranged in the human abdominal cavity 2, and the human abdominal cavity 2 is connected with the human body end pipeline 30 through the preset pipe;

at least one drainage pipeline 20 for guiding the waste liquid of the human abdominal cavity 2 out of the body, wherein one end of the drainage pipeline 20 is connected with the preset pipe, the other end is a liquid discharge end 41, and the height of the liquid discharge end 41 from the ground is L4; the drainage pipeline 20 comprises a human body end pipeline 30 for connecting the human body abdominal cavity 2 with the consumable box 6, and a rear end drainage pipeline 201 for connecting the consumable box 6 with the liquid discharge end 41;

the height of the liquid discharge end 41 of the drainage pipeline 20 is lower than that of the human abdominal cavity 2, and the power for discharging the dialysate in the human abdominal cavity 2 out of the human body is provided by the height difference between L2 and L4;

According to the utility model, a consumable box can be arranged or not, and the negative pressure generating unit 4 can be arranged at the drainage pipeline in various ways. The height of the consumable box 6 from the ground is L5, and the height of the L5 is adjustable.

Preferably, when the drainage pipeline comprises the consumable box 6, the height of the consumable box 6 from the ground is L5, the abdominal cavity liquid is firstly sucked into the consumable box by using power (power type principle), the gravity of L5-L2 is overcome by using the power, and when the whole drainage pipeline 20 is filled with the liquid, the abdominal cavity built-in pipeline is communicated with the drainage pipeline 20 and the waste liquid collecting device 3. At this time, the power is stopped, and the liquid in the abdominal cavity is continuously drained to the waste liquid collecting device 3 through the drainage pipeline 20 by using the siphon principle. In use, the consumable cartridge 6 is placed in the APD mainframe 5.

The conventional power drainage profile is generally as shown in fig. 5, which is first drawn from the abdominal cavity position of L2 to the consumable cartridge position of L5, and then drained to the waste collection device of L4. The APD of the peritoneal dialysis system of the utility model has a dynamic drainage curve as shown in figure 6, and the height L5 of the consumable box is adjusted to enable the L5 to be adjusted to be consistent or basically consistent with the position of the abdominal cavity of the L2, and then the APD is drained to the waste liquid collecting device of the L4, so that the drainage becomes simpler and smoother.

The difference in height between L5 and L1 and L2 allows adjustment of the dialysate injection flow rate. The discharge flow rate of the waste liquid can be adjusted by the height difference between L5 and L2 and L4.

The negative pressure generated by the negative pressure generating unit is preferably-40 mmHg to-80 mmHg, namely-5.3 to-10.7 KPa according to the L2 height and the L5 height which are set by people habitually. At the moment, the smooth work of the peritoneal dialysis system can be ensured, and the abdominal cavity pressure of the human body is in accordance with the regulation of law.

As a more preferred embodiment of the present invention, referring to fig. 3 and 4, the present invention further comprises a supplement pouch 7 for supplementing dialysate, and a last pouch 8 for providing dialysate to be retained in the abdominal cavity of a human body.

As shown in fig. 4, the height of the liquid supply bag 1 from the ground is L1, the height of the human abdominal cavity 2 from the ground is L2, the height of the supplement medicine bag 7 from the ground is L3, the height of the last medicine bag 8 from the ground is L3, and the height of the liquid discharge end 41 from the ground is L4.

The difference between the heights of L3 and L1 is L3 > L1, and the dialysate is supplemented by controlling the difference between the heights of L3 and L1. Meanwhile, the last liquid medicine is replenished by controlling the height difference between L3 and L1.

As shown in fig. 7 and 8, the negative pressure generating unit 4 includes a negative pressure cavity 41, and a negative pressure generator 42 connected to the negative pressure cavity 41, wherein the negative pressure cavity 41 is disposed on the drainage pipeline 20;

after the negative pressure generator 42 is started and the negative pressure cavity 41 reaches the specified pressure, the negative pressure generator 42 stops working;

the liquid in the drainage pipeline 20 continuously flows into the negative pressure cavity 41 under the pressure of the negative pressure cavity 41, and the liquid in the negative pressure cavity 41 continuously flows out under the action of gravity, so that the negative pressure cavity 41 is maintained within a preset pressure range.

With reference to fig. 9 and 10, the negative pressure generator 42 includes a housing 421, an air inlet 422 and an air outlet 423 are provided on the housing 421, and a negative pressure pump 424, a water filter valve 425, a pressure release valve 426 and a pressure sensor 427 are provided in the housing 421. The negative pressure cavity 41 is connected with the air inlet 422 of the negative pressure generator through a negative pressure interface end so as to apply variable negative pressure to the negative pressure cavity.

It should be noted that, this embodiment only shows one embodiment of the negative pressure generator, and the negative pressure generator with other structure may be adopted in the present invention as long as it generates variable negative pressure.

As shown in fig. 7 and 8, the consumable cartridge 6 includes:

a front-end liquid supply line 101 for connecting the liquid supply bag;

a rear end drainage line 201 for connection to a waste liquid collection device;

a body end conduit 30 for connection to the abdominal cavity of a human body;

a supplement pipeline 40 for connecting with the supplement medicine bag;

a last tubing 50 for connection to a last fluid bag;

the utility model discloses a medical pipeline, including front end liquid supply pipeline 101, rear end drainage pipeline 201, human end pipeline 30, supplementary pipeline 40, last pipeline 50, the tip of front end liquid supply pipeline 101, rear end drainage pipeline 201, human end pipeline 30, supplementary pipeline 40, last pipeline 50 is equipped with the five-way pipe, is equipped with medical pipe clamp on the five-way pipe, connects through medical pipe clamp 60 between front end liquid supply pipeline 101, rear end drainage pipeline 201, human end pipeline 30, supplementary pipeline 40, the last pipeline 50, forms intercommunication pipeline. The medical tube clamp 60 is preferably a robert clamp, but is not so limited. As other embodiments, the medical tube clamp 60 can be a pinch valve, a solenoid valve, a linear motor, etc.

The existing consumable box mostly adopts a labyrinth type consumable box in order to achieve a good dialysis effect. However, the consumable box is simple in structure, only comprises five pipelines, and can be arranged side by side.

The rear end drainage pipeline 201 comprises a drainage branch pipeline 201A, a drainage branch pipeline 201B and a negative pressure interface end 202, the drainage branch pipeline 201A is communicated with one end of the negative pressure cavity 41, and the drainage branch pipeline 201B and the negative pressure interface end 202 are communicated with the other end of the negative pressure cavity 41. The consumable cartridge 6 is connected to the air inlet 422 of the negative pressure generator through the negative pressure interface end 202 on the negative pressure chamber. Thereby applying a variable negative pressure to the negative pressure cavity. The end of the drainage branch pipe 201A is provided with a one-way valve which is connected with a waste liquid collecting device.

With reference to fig. 7 and 8, from right to left, the robert clamps include a first robert clamp 601, a second robert clamp 602, a third robert clamp 603, a fourth robert clamp 604, and a fifth robert clamp 605.

And (3) an injection stage: the third robert clamp 603 and the fourth robert clamp 604 are opened, and the distal end liquid supply line 101 and the body end line 30 are connected. Under the action of gravitational potential energy of the height difference of L1-L2, the liquid flows into the abdominal cavity of the human body from the liquid supply bag.

And monitoring the weight of the liquid supply bag in real time through the first weighing unit. Reach the prescribed value within a certain range, and have no flow rate. The system closes the third and fourth robert clamps 603 and 604 and the implant is completed.

And (3) a supplement stage: the second and third robert clamps 602 and 603 are opened, and the replenishment line 40 communicates with the front-end liquid supply line 101. Under the gravity action of the height difference of L3-L1, the liquid flows into the liquid supply bag from the supplement medicine bag.

And monitoring the weight of the liquid supply bag in real time through the first weighing unit. Comparing the recipe, reaching the set value, the system closes the second robert clamp 602 and the third robert clamp 603, and the injection is completed.

The final supplement stage: the first and third robert clamps 601 and 603 are opened, and the last line 50 communicates with the front end liquid supply line 101. Under the gravity action of the height difference of L3-L1, the liquid flows into the liquid supply bag from the last medicine bag.

A drainage stage: the fourth robert clamp 604 and the fifth robert clamp 605 are opened, the negative pressure generator is started, and the pressure in the negative pressure cavity is set to be a preset value P1. Because the end of the drainage branch pipe 201A is provided with the one-way valve, the negative pressure cavity can suck the liquid in the abdominal cavity through the drainage pipeline 20. And when P1 is greater than the corresponding liquid column pressure (L5-L2), the peritoneal fluid will be sucked into the negative pressure cavity. When the liquid column pressure of P1 is less than or equal to L6, L6 is L5-L4, and the liquid in the negative pressure cavity is discharged into the waste liquid collecting device.

When the second weighing unit monitors that the weight of the waste liquid barrel changes, the negative pressure pump stops working, and the pressure in the negative pressure cavity is P1 (L5-L2), wherein the corresponding liquid column pressure is less than P1 and is not more than L6. Then, the negative pressure in the negative pressure cavity sucks the liquid in the abdominal cavity into the negative pressure cavity through the drainage branch pipe 201B, and the liquid in the negative pressure cavity is influenced by gravity and continuously flows into the waste liquid collecting device through the drainage branch pipe 201A, so that continuous negative pressure is formed on the abdominal cavity.

During the whole drainage process, the system continuously monitors the pressure of the negative pressure cavity, and when the pressure is less than 10% of a set value P1, the negative pressure pump is started again to maintain the pressure of the negative pressure cavity.

In the whole drainage process, the weight change in unit time of the waste liquid collecting device is monitored by the second weighing unit, the real-time flow of the drainage pipeline is obtained, and then whether negative pressure is reapplied to the drainage pipeline or whether the applied negative pressure is adjusted is judged.

In addition, when the second weighing unit judges that the total amount of the liquid in the waste liquid collecting device is more than 80% of the drainage amount of the prescription and the flow rate is not high, the next treatment period is started.

The whole treatment process is repeatedly completed. Before the last drainage in the execution therapy is finished, a pressure release valve of the negative pressure pump is opened to release the pressure of the negative pressure cavity, and the liquid in the whole pipeline naturally flows into the waste liquid collecting device.

The consumable box has simple pipeline and structure, greatly reduces the cost, and makes the APD applied to the family treatment of patients possible. In addition, the simplified consumable box can further reduce the volume of the peritoneal dialysis equipment, and is convenient to carry.

The second weighing unit 57 is connected with the negative pressure generating unit through a control module and is used for acquiring the real-time flow of the drainage pipeline according to the real-time weight of the waste liquid collecting device; and then judging whether to apply negative pressure to the drainage pipeline or adjust the applied negative pressure according to the real-time flow of the drainage pipeline, so as to accurately control the flow of liquid in the drainage pipeline and further ensure that the waste liquid in the abdominal cavity of the human body can be thoroughly emptied.

Specifically, when the real-time flow of the drainage pipeline is smaller than a preset value, the negative pressure generating unit is started; and when the real-time flow of the drainage pipeline is greater than or equal to a preset value, stopping the negative pressure generating unit. When the negative pressure generating unit stops working, the drainage pipeline continuously discharges liquid from the human body by means of suction force generated by the weight of the liquid in the pipeline, or continuously discharges the liquid from the human body by means of gravity by adjusting the height relation of L5, L2 and L4. The flow monitoring method has the advantages of simple structure and reliable work, and can provide a quiet dialysis environment for a patient and provide a high-quality dialysis treatment course by matching with the negative pressure generating unit.

As a better embodiment of the present invention, the present embodiment sets a preset value of the dialysate of the waste liquid collecting device, and starts the negative pressure generating unit only when the weight of the dialysate in the waste liquid collecting device does not reach the preset value and the real-time flow of the drainage pipeline is smaller than the preset value; and when the weight of the dialysate in the waste liquid collecting device reaches a preset value or the real-time flow of the drainage pipeline is greater than or equal to the preset value, stopping the negative pressure generating unit. In this scheme, the drainage weight of the waste liquid collecting device is added as the starting and stopping condition of the negative pressure generating unit, when the current weight of the waste liquid collecting device reaches a preset value, the liquid in the abdominal cavity is fully discharged, the negative pressure generating unit is not started at the moment, and the liquid in the abdominal cavity continues to slowly flow out by means of gravity, so that discomfort caused to a patient by intervention of the negative pressure generating unit when the liquid in the abdominal cavity is basically discharged is avoided.

In conclusion, the peritoneal dialysis system of the present invention can implement various therapies for automated peritoneal dialysis, including CCPD, IPD, TPD, etc. The peritoneal dialysis system enables the prescription of dialysis treatment to have greater flexibility, can individually set the injection liquid amount and the waste liquid amount discharged, timely adjusts the dialysis liquid amount suitable for the treatment requirements of patients, enables the patients to automatically exchange peritoneal dialysis liquid during sleeping, and can perform corresponding adjustment of treatment according to the peritoneal capacity and peritoneal functions of the patients, thereby achieving sufficient dialysis and improving the life quality of patients.

As a better embodiment of the utility model, the utility model can also be provided with intelligent control equipment to control the injection flow, the output waste liquid flow, the treatment time and the handover times, and is provided with an early warning correction system to ensure the effectiveness and the safety of treatment to a greater extent.

The utility model will be further explained with reference to the following examples

Aiming at a certain patient, the diagnosis and treatment prescription is 1000ml of initial drainage; total injection amount: 8000ml, single injection 2000 ml; retained abdomen 2000 ml:

the peritoneal dialysis system shown in fig. 3 was used, and set to L1-110 cm, L2-60 cm, L3-170 cm, L4-40 cm, and L5-1000 cm, the pressure generated by the initial negative pressure was 10KPa, and the drainage rate was calculated from the change in the weight of the waste liquid collection device. If the initial drainage speed is 100ml/min, the drainage speed is continuously increased along with the continuous negative pressure. Along with the increase of the drainage speed, the initial negative pressure is continuously reduced, so that the drainage speed is maintained at 200ml/min, and the negative pressure is kept at about 4 kpa. The initial drainage is completed.

Liquid injection phase, by difference in height L1-L2: 50cm, the dialysate injection flow is 200ml/min, and the L1 height can be adjusted by the push rod motor, so as to adjust the injection flow.

In the liquid drainage stage, initial negative pressure of 10kpa is loaded, so that waste liquid flows into the waste liquid collecting device from the abdominal cavity. Along with the waste liquid drainage speed is accelerated, the negative pressure is gradually reduced until the waste liquid drainage is stopped. The discharge flow of the abdominal cavity waste liquid is controlled to be 5-250 ml/min, the negative pressure is reduced when the flow speed is too high, and the negative pressure can be properly increased when the flow speed is too low.

When the prescription is changed, the purposes of changing the dialysate injection flow and the discharge flow of the abdominal cavity waste liquid can be achieved by adjusting the height of the APD dialysis machine.

Example 3

The present embodiment is different from the first and second embodiments in that the present invention further comprises a positive pressure generating unit (not shown in the figures) for providing additional power for guiding the dialysate of the fluid bag into the abdominal cavity of the human body, wherein the positive pressure generating unit can be a fluid bag squeezing device, specifically a pressure plate, an air bag, etc., for squeezing the fluid bag and providing a positive pressure for infusing the dialysate of the fluid bag. The system also comprises an APD host 5, wherein the APD host 5 is a control core of the system.

Preferably, referring to fig. 11, the APD host 5 includes a heating unit 51, a power supply 52, a consumable box switch control module 53, a PCBA board 54, a display screen 55, a first weighing unit 56, a second weighing unit 57, an upper casing 58 and a lower casing 59, wherein the first weighing unit 56 is disposed at an upper portion of the APD host 5 for weighing a real-time weight of the liquid supply bag. The second weighing unit 57 is disposed at the lower portion of the APD mainframe 5 and is used for weighing the real-time weight of the waste liquid collecting device. The heating unit 51 is arranged on the top of the APD host 5 and used for heating the liquid supply bag. The inside of APD host computer 5 is located to consumptive material box 6, consumptive material box on-off control module 53, and consumptive material box on-off control module 53 is connected with consumptive material box 6 for the pipeline of control consumptive material box 6 is opened and is closed. The negative pressure generation unit 4 is provided inside or outside the APD main unit 5. The PCBA board 54 is a control module of the APD host 5, and is connected to the consumable box switch control module 53, the heating unit 51, the first weighing unit 56, the second weighing unit 57, the display screen 55, and the like, and mainly controls the fluid distribution relationship of the system, including controlling the flow rate of the liquid in the liquid supply pipeline and/or the drainage pipeline.

The heating unit 51 is arranged in the embodiment, so that the liquid supply bag 1 borne on the bearing platform 9 can be heated to a preset temperature and continuously insulated, and the troubles of heating the liquid supply bag 1 in advance and insulating the liquid supply bag 1 in the infusion process are avoided. The dialysate input and output process of the embodiment is mainly implemented by taking the height difference of the liquid supply bag 1, the human abdominal cavity 2 and the liquid discharge end 41 of the drainage pipeline 20 as power, the whole process is stable and quiet, and the peritoneal dialysis experience of a patient can be greatly improved. In this embodiment, the weight change of the liquid supply bag 1 supported on the supporting platform 9 is monitored by the first weighing unit 52, the implementation flow rate of the liquid supplied to the human abdominal cavity 2 is calculated, and when the flow rate of the liquid flowing into the human abdominal cavity 2 from the liquid supply bag 1 is lower than a preset value, the negative pressure generating unit 4 intervenes to increase the liquid supply pressure in a short time, so as to solve various obstacles which may occur in the perfusion process, so that the dialysate can flow into the abdominal cavity timely and sufficiently, and the curative effect of peritoneal dialysis is ensured.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model.

Claims

1. A peritoneal dialysis system, comprising:

at least one liquid supply bag for supplying dialysate to the abdominal cavity of the human body, wherein the height of the liquid supply bag from the ground is L1, and the height of the liquid supply bag from the ground is L2;

2. The peritoneal dialysis system of claim 1 wherein the drain end of the drain line is disposed in a waste tank carried on a second weighing unit.

3. The peritoneal dialysis system of claim 2 wherein the negative pressure generating unit comprises a negative pressure chamber, a negative pressure generator connected to the negative pressure chamber, the negative pressure chamber disposed on the drainage line.

4. The peritoneal dialysis system of claim 3 wherein the negative pressure generator comprises a housing having an air inlet and an air outlet, a negative pressure pump, a water filter valve, and a pressure relief valve disposed therein;

5. The peritoneal dialysis system of claim 2, further comprising:

a supplement pouch for supplementing dialysate;

and a final pouch for holding dialysate inside the abdominal cavity of the human body.

6. The peritoneal dialysis system of claim 2 wherein the fluid supply lines, drain lines, and supply lines are provided by a consumable cartridge; the consumable cartridge includes:

a body end pipeline for connecting with the abdominal cavity of the human body;

a front end liquid supply pipeline connected with the liquid supply bag;

a supplement pipeline connected with the supplement medicine bag;

a last tubing for connection to a last fluid bag;

7. The peritoneal dialysis system of claim 6 wherein the front end supply line and the body end line comprise the supply line and the body end drain line and the back end drain line comprise the drain line.

8. The peritoneal dialysis system of claim 1 further comprising a positive pressure generating unit that is a fluid bag squeezing device for squeezing the fluid bag to provide a positive pressure for infusion of the dialysate from the fluid bag.

9. Peritoneal dialysis system according to any one of claims 1-2, 7-8, characterized in that the carrier platform is provided with a first weighing unit.

10. The peritoneal dialysis system of any one of claims 1-2, 7-8, wherein the carrier platform is provided with a heating unit.