CN218739700U

CN218739700U - Blood purification device

Info

Publication number: CN218739700U
Application number: CN202221714841.5U
Authority: CN
Inventors: 冉彬杉; 王泽亚; 龚铃堰; 罗作虎
Original assignee: Qiande Biomedical Technology Chongqing Co ltd
Current assignee: Qiande Biomedical Technology Chongqing Co ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2023-03-28
Anticipated expiration: 2032-06-29

Abstract

The utility model provides a blood purification device, which belongs to the field of medical equipment. The method comprises the following steps: the tank body is internally provided with a cavity and a filter screen which is arranged in the cavity; the tank body is provided with two interfaces for liquid to enter and exit, and the two interfaces are respectively communicated with the first part and the third part; the first portion and/or the third portion are/is internally provided with a communication port which is communicated with the outside of the tank body and can be blocked, the flow area of the communication port is smaller than that of the tank body, when liquid passes through the communication port, the communication port generates a suction area, and the filter screen adjacent to the communication port is at least partially positioned in the suction area. The utility model discloses can discharge air in the blood purification device when the pre-filling to reduce the loss of adsorbent, reduce the pollution of adsorbent granule to circulation pipeline.

Description

Blood purification device

Technical Field

The utility model belongs to the field of medical equipment, especially, relate to a blood purification device.

Background

The blood purification device can lead the blood of a patient from the body to an extracorporeal circulation system, and the blood purification device adsorbs and combines the adsorbents and the medicines made of materials such as activated carbon resin and the like in the blood with metabolites and toxic substances to be eliminated in the blood, so that the purpose of eliminating the metabolites and the toxic substances is achieved. The blood purification device can be widely applied to the aspects of rescue and treatment of various clinical serious diseases such as drug or poison poisoning, severe infection, severe liver failure, end-stage kidney diseases, various autoimmune diseases and the like.

The blood purification device is connected with the external circulation pipeline in the blood purification process. Blood in the external circulation pipeline needs to enter the tank body through the external circulation pipeline to be combined with the adsorbent, so that toxic substances in the blood are adsorbed, and the adsorbed blood flows into a human body through the pipeline to circulate. Blood purification device need be discharged inside air to the greatest extent before using to avoid the air admission human body and lead to patient's shock, influence patient's life safety. Conventionally, air in a blood purification apparatus is generally discharged by filling the blood purification apparatus with a physiological saline solution. However, because the filter screen is arranged in the blood purification device, and the aperture of the filter screen is smaller, water can form a water film when passing through the filter screen, and air in the blood purification device is blocked from being discharged. Therefore, when some blood purification devices discharge air, the blood purification devices need to be manually knocked by using a rubber hammer to break up the water film on the filter screen so as to discharge the air. The air in the blood purification apparatus is discharged by beating, so that it is difficult to exhaust the air in the blood purification apparatus, and the residual air may enter the human body. And the blood purification device is easy to damage when being knocked, which results in the rejection of the blood purification device. Meanwhile, in order to discharge air in the blood purification device as much as possible, the duration of the beating is usually long, the working intensity of the operator is increased, and the use experience of the operator is also influenced. Therefore, some blood purification device additionally are provided with the pipe portion that passes the filter screen at present, and when carrying out the preliminary filling to blood purification device, air and normal saline discharge from the pipe portion, but because the pipe portion passes the filter screen, lead to adsorbent granule in the filter screen to directly discharge in the pipe portion easily, cause the loss of adsorbent, if pipe portion lug connection circulation pipeline adsorbent granule can cause the pollution to circulation pipeline simultaneously, have the adsorbent granule to follow the risk that gets into the human body when subsequently purifying blood.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a blood purification device for solving the problems in the prior art that the adsorbent particles in the filter net are easily and directly discharged from the tube portion.

To achieve the above and other related objects, the present invention provides a blood purification device, comprising:

a can having a cavity therein, an

A filter screen disposed within the cavity;

the tank body is provided with two ports for liquid to enter and exit, and the two ports are respectively communicated with the first part and the third part;

the first portion and/or the third portion are/is internally provided with a communication port which is communicated with the outside of the tank body and can be blocked, the flow area of the communication port is smaller than that of the tank body at a filter screen adjacent to the communication port, when liquid passes through the communication port, the communication port generates a suction area, and the filter screen adjacent to the communication port is at least partially positioned in the suction area.

Optionally, a distance between the communication port and the adjacent filter screen is less than or equal to 2mm, and a flow area of the communication port is less than or equal to 314.16mm ² 。

Optionally, a distance between the communication port and the adjacent filter screen is less than or equal to 1mm, and a flow area of the communication port is less than or equal to 78.54mm ² 。

Optionally, the communication port is attached to the adjacent filter screen.

Optionally, the communication ports are two or more.

Optionally, the tank body comprises a hollow cylinder body and two cover bodies, the two cover bodies are respectively arranged at two ends of the cylinder body, and the two filter screens are sequentially arranged along the length direction of the cylinder body.

Optionally, the filter screen is disposed within the barrel or within the lid.

Optionally, the tank body has a through pipe portion, one end of the pipe portion enters the tank body, the other end of the pipe portion protrudes out of the tank body, and the communication port is arranged at one end of the pipe portion entering the tank body.

Optionally, a connecting structure is provided on an end of the pipe portion protruding from the tank body.

Optionally, the inner wall of the pipe portion is conical, and the size of the inner wall of the end, protruding out of the tank body, of the pipe portion is larger than the size of the inner wall of the end, entering into the tank body, of the pipe portion.

Optionally, still include the rack, the filter screen sets up on the rack.

Optionally, be provided with the intercommunicating pore on the rack, the filter screen covers the intercommunicating pore, the intercommunicating pore is close to one of serving opening of filter screen does the intercommunication mouth, jar be provided with tub portion on the body, tub portion gets into jar internal one end is aimed at the intercommunicating pore and with the intercommunicating pore links to each other, the intercommunication mouth pass through the intercommunicating pore and tub portion with jar external intercommunication.

As mentioned above, the utility model provides a blood purification device has following beneficial effect: because the tank body is provided with the communicating port, and the flow area of the communicating port is smaller than that of the tank body, when the physiological saline injected into the tank body by the external circulation pipeline flows through the communicating port, the flow speed of the physiological saline at the communicating port is increased, the pressure is reduced, and a suction area is generated. Simultaneously, at least part of the filter screen is positioned in the suction area, so that the water film of the filter screen in the suction area is broken under the action of pressure, air in the water film passes through the filter screen and is discharged from the communicating port under the action of the flow of the physiological saline, and the effect of discharging the air in the blood purification device is achieved. Meanwhile, the communicating port is communicated with the first portion or the third portion, the first portion and the second portion are separated by the filter screen, and the filter screen can block adsorbent particles. Therefore, the adsorbent particles contained in the second part cannot be discharged from the communication port together with the physiological saline, the loss of the adsorbent is reduced, and the pollution of the adsorbent particles to the circulation pipeline is reduced.

Drawings

FIG. 1 is a schematic cross-sectional view of a blood purification apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic partial enlarged cross-sectional view of a blood purification apparatus according to an embodiment of the present invention;

FIG. 3 is an enlarged cross-sectional view of a tube portion according to an embodiment of the present invention;

FIG. 4 is an enlarged schematic view of the position of the communication port and the filter screen in the embodiment of the present invention;

FIG. 5 is an exploded view of the blood purification apparatus according to the embodiment of the present invention;

fig. 6 is a schematic view illustrating the filter net disposed on the cover body according to an embodiment of the present invention;

fig. 7 is a schematic view of the embodiment of the present invention in which the filter screen is disposed on the cylinder;

FIG. 8 is a schematic view of a pipe bending device according to an embodiment of the present invention;

fig. 9 is a second enlarged sectional view of the tube portion according to the embodiment of the present invention;

fig. 10 is a schematic diagram of the space between the communication port and the adjacent filter screen in the embodiment of the present invention.

Description of the reference numerals: barrel 1, lid 2, interface 3, pipe portion 4, intercommunication mouth 5, filter screen 6, end cover 7, connecting thread 8, rack 9, intercommunicating pore 10, interval 11.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

Please refer to fig. 1 to 3. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention. The blood purification apparatus of the present embodiment can be used for purification of whole blood or blood components, that is, the blood purification apparatus of the present embodiment can be used for blood perfusion, plasma purification, and the like.

Referring to fig. 1 to 10, the present embodiment provides a blood purification device, which includes a canister and a filter 6. The tank body is internally provided with a cavity. A sieve 6 is arranged in the cavity in the tank body. The number of the filter screens 6 is at least two, and the two filter screens 6 divide the cavity into a first part, a second part and a third part in sequence. The tank body is provided with two interfaces 3, and the two interfaces 3 are respectively communicated with the first part and the third part and can be used for liquid to enter and exit the tank body. The first or third portion has a communication port 5 therein which can be closed, and the communication port 5 communicates with the outside of the pipe body. The communication opening 5 has a smaller flow area than the tank body at the screen 6 adjacent to the communication opening 5, when the liquid passes through the communication opening 5, a suction area is created near the communication opening 5, and the screen 6 adjacent to the communication opening 5 is at least partially located in the suction area.

Because the communicating opening 5 is arranged on the tank body, and the flow area of the communicating opening 5 is smaller than that of the tank body, when the physiological saline injected into the tank body by the external circulation pipeline flows through the communicating opening 5, the flow rate of the physiological saline at the communicating opening 5 is increased, the pressure is reduced, and a suction area is generated near the communicating opening 5. Meanwhile, at least part of the filter screen 6 is positioned in the suction area, so that the water film of the filter screen 6 in the suction area can be broken under the action of pressure, air in the water film passes through the filter screen 6 and is discharged from the communicating port 5 under the action of the flow of the physiological saline, and the effect of discharging the air in the blood purification device is achieved. Meanwhile, the communication port 5 is communicated with the first portion or the third portion, the first portion and the second portion are separated by the filter screen 6, and the filter screen 6 can block adsorbent particles. Therefore, the adsorbent particles contained in the second part cannot be discharged from the communication port 5 together with the physiological saline, so that the loss of the adsorbent is reduced, and the pollution of the adsorbent particles to the circulation line is reduced.

In the blood purification apparatus, the size of the canister body, the size of the interface 3, and the like are generally specified. Thus, as shown in FIG. 10, in some embodiments, the spacing 11 between the communication port 5 and the adjacent screen 6 is less than or equal to 2mm, and the communication port 5 has a flow area less than or equal to 314.16mm2, such that the screen 6 adjacent to the communication port 5 is at least partially within the suction zone. Specifically, the distance 11 between the communication port 5 and the adjacent filter screen 6 may be less than or equal to 1mm, and the flow area of the communication port 5 may be less than or equal to 78.54mm2, so that more filter screens 6 are located in the suction area. In another embodiment, the communication port 5 is attached to the adjacent screen 6, that is, the distance 11 between the communication port 5 and the adjacent screen 6 is zero, and the area of the screen 6 in the suction area is the largest.

In some embodiments, there are two communication ports 5, and the two communication ports 5 communicate with the first portion and the third portion, respectively. When the blood purification apparatus is primed, one of the communication ports 5 may be selected as the tube portion 4 from which the physiological saline is discharged, depending on the case. In some embodiments, the sum of the flow areas of the two communication ports 5 is smaller than the flow area of the tank, and the two communication ports 5 may be selected to be the tube portion 4 for discharging the physiological saline at the same time. The two communication ports 5 have the capability of breaking water films on the two filter screens 6 at the same time, so that the use is simpler and more convenient.

In other embodiments, two communication ports 5 may be provided on the same end of the tank, communicating with the first or third portion. In still other embodiments, the communication ports 5 may be three or more, and the communication ports 5 may be in communication with the first portion or the third portion.

Specifically, the tank body is provided with a through pipe part 4, one end of the pipe part 4 enters the tank body, the other end of the pipe part 4 protrudes out of the tank body, and the communication port 5 is arranged at one end of the pipe part 4 entering the tank body. The end of the tube 4 protruding from the tank may be provided with a connection structure. In some embodiments, the connecting structure is a snap, and in this embodiment, the connecting structure is a thread. The connection structure may be used for a structure for plugging the pipe portion 4 such as a connection cap. When the blood purification device works, medicines such as anticoagulant and the like are generally required to be added, the pipe part 4 can be used for adding liquid medicine into the tank body, and therefore the connecting structure can also be connected with a liquid medicine adding pipeline. As shown in fig. 3, in some embodiments, the inner wall of the pipe portion 4 is conical, and the size of the pipe portion 4 protruding from the inner wall of the tank at one end is larger than the size of the pipe portion 4 entering the inner wall of the tank at one end. The inner wall of the tube portion 4 is reduced in size in the direction toward the inside of the tank body, thereby facilitating the alignment of the liquid medicine adding port 3 when the medicine is added. The slope of the inner wall may be 1: a 0.06 luer taper, or other slopes according to actual working conditions.

Specifically, the jar body is including hollow barrel 1 and lid 2, and lid 2 is two, and two lids 2 set up respectively at barrel 1 both ends, and two filter screens 6 set gradually along barrel 1's length direction. The cylinder body 1 and the cover body 2 are made of the same polymer plastic material, and the cylinder body 1 and the cover body 2 can be connected in an infrared welding mode or in an ultrasonic welding mode, a hot plate welding mode, a rotary welding mode, a laser welding mode and the like.

As shown in fig. 7, in some embodiments the screen 6 is disposed within the cartridge body 1. In other embodiments, as shown in fig. 6, the screen 6 is disposed within the cover 2. The filter screen 6 can be arranged on the net rack 9 and then is fixedly arranged inside the tank body through the net rack 9. The filter screen 6 may be directly provided on the cylinder 1 or the lid 2. When the filter screen 6 is arranged on the net rack, the communication port 5 can be wholly corresponding to the inside of the filter screen 6, and also can be partially corresponding to the filter screen 6 and partially corresponding to the net rack 9.

As shown in fig. 9, in some embodiments, the pipe part 4 of the tank body is aligned with the net frame 9, the net frame 9 is provided with a communication hole 10, the filter screen 6 covers the communication hole 10, the opening of the communication hole 10 at the end close to the filter screen 6 is the communication port 5, the tank body is provided with the pipe part 4, one end of the pipe part 4 enters the tank body and is aligned with the communication hole 10 and is connected with the communication hole 10, and the communication port 5 is communicated with the outside of the tank body through the communication hole 10 and the pipe part 4.

The outer part of the interface 3 facing the tank body is protruded out of the cover body 2, and the part of the interface 3 protruded out of the cover body 2 is detachably connected with an end cover 7. The part of the interface 3 protruding out of the cover body 2 is provided with an inner layer and an outer layer, and the outer layer can be matched with the thread of the end cap to rotate and tighten to play a role in connection. The inner layer is matched with the sealing bulge in the end cap to play a sealing role. Inner and outer separation, when guaranteeing that end cover 7 connects on interface 3, interface 3 inlayer can not receive the effort of outer transmission and warp, guarantees the sealed effect between interface 3 and the end cover 7.

In actual use, the adsorbent is filled between the two screens 6, and the two screens 6 block the adsorbent. When the tank body is pre-filled, one connector 3 is communicated with a pipeline for providing normal saline, and then the communication port 5 is communicated with the waste liquid bag. Then, normal saline is injected into the tank body, and the air in the tank body is discharged by the normal saline. If bubbles still exist after the physiological saline water in the tank body is filled, the tank body can be moved, and the angle and the position of the tank body are adjusted, so that the bubbles are aligned to the communication port 5 under the action of buoyancy. After the bubbles enter the suction area formed by the communication port 5, the water film on the filter screen 6 at the position of the bubbles is broken, and the gas in the bubbles gradually passes through the filter screen 6 and enters the waste liquid bag along with the physiological saline. In this embodiment, the communication port 5 is provided at the edge of the can body, so that the bubbles are easily aligned with the communication port 5. In some embodiments, the tubular portion 4 is of a bent shape to prevent bending of the pipeline connected to the tubular portion 4 when the can body is rotated.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. It will be apparent to those skilled in the art that modifications and variations can be made to the above-described embodiments without departing from the spirit and scope of the invention, and it is intended that all equivalent modifications and variations be covered by the appended claims without departing from the spirit and scope of the invention.

Claims

1. A blood purification device, comprising:

a can having a cavity therein, an

A filter screen disposed within the cavity;

2. The blood purification apparatus according to claim 1, wherein: the distance between the communication port and the adjacent filter screen is less than or equal to 2mm, and the flow area of the communication port is less than or equal to 314.16mm ² 。

3. A blood purification apparatus according to claim 2, wherein: the distance between the communication port and the adjacent filter screen is less than or equal to 1mm, and the flow area of the communication port is less than or equal to 78.54mm ² 。

4. The blood purification apparatus according to claim 1, wherein: the communication ports are two or more.

5. The blood purification apparatus according to claim 1, wherein: the jar body includes hollow barrel and two lids, two the lid sets up respectively the barrel both ends, two the filter screen is followed the length direction of barrel sets gradually.

6. The blood purification apparatus according to claim 1, wherein: the tank body is provided with a pipe part, one end of the pipe part enters the tank body, the other end of the pipe part protrudes out of the tank body, and the communication port is formed in one end, entering the tank body, of the pipe part.

7. The blood purification apparatus according to claim 6, wherein: one end of the pipe part protruding out of the tank body is provided with a connecting structure.

8. The blood purification apparatus according to claim 6, wherein: the inner wall of the pipe part is conical, and the size of the pipe part protruding out of the inner wall of one end of the tank body is larger than the size of the pipe part entering the inner wall of one end of the tank body.

9. A blood purification apparatus according to claim 1, wherein: still include the rack, the filter screen sets up on the rack.

10. A blood purification apparatus according to claim 9, wherein: be provided with the intercommunicating pore on the rack, the filter screen covers the intercommunicating pore, the intercommunicating pore is close to one of serving opening of filter screen does the intercommunication mouth, jar is provided with the pipe portion on physically, the pipe portion gets into jar internal one end is aimed at the intercommunicating pore and with the intercommunicating pore links to each other, the intercommunication mouth passes through the intercommunicating pore reaches the pipe portion with jar external intercommunication.