CN219835618U - ECMO loop blood drawing device - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, and provides an ECMO loop blood drawing device, which comprises: the device comprises a connecting pipe, a blood suction pipe, a first branch pipe, a second branch pipe, a third branch pipe and a closure structure. One end of the connecting pipe is connected to the ECMO ring, the blood pumping pipe is detachably connected to the other end of the connecting pipe, the first branch pipe is connected to the blood pumping pipe and forms a first node, the second branch pipe and the third branch pipe are connected to the blood pumping pipe in parallel and form a second node, the first node is located between the connecting pipe and the second node, and the closure structure is suitable for controlling the opening or closing of the connecting pipe, the blood pumping pipe, the first branch pipe, the second branch pipe and the third branch pipe respectively. The ECMO loop blood drawing device provided by the utility model can facilitate blood drawing operation of operators, and the blood drawing tube is detachable, so that a new blood drawing tube can be arranged on the connecting tube, repeated utilization of the blood drawing tube is avoided, and the risk of infection is reduced.

Description

ECMO loop blood drawing device

Technical Field

The utility model relates to the technical field of medical equipment, in particular to an ECMO loop blood drawing device.

Background

ECMO is an important in vitro life support aid for maintaining the life of circulatory and/or respiratory failure patients. During ECMO operation, the low oxygenated blood in the ECMO loop forms high oxygenated blood after pulmonary oxygenation through the membrane back into the body to supply oxygen to the body.

In clinical practice, blood is often drawn from the anterior and posterior parts of the membrane to perform blood gas analysis to determine the function of the membrane, including oxygenation and carbon dioxide elimination, and to determine the oxygen consumption of the patient's body, and to replace the membrane if necessary. In the case of VV-ECMO, pre-membrane oxygenation also reflects ECMO recirculation to determine if cannula placement needs to be adjusted. Blood and qi drawing in the ECMO loop is routine practice in clinic and of great importance.

At present, the blood drawing operation is carried out clinically through a three-way joint or an extension three-way joint connected to the front part and the rear part of the membrane lung. The operation mainly comprises three steps, namely firstly, the operation of the blood drawing plug, and the operation of drawing out the accumulated blood and thrombus remained in the tee joint or the extension tee joint; secondly, using a blood drawing needle tube to draw blood and qi; finally, heparin water is used for sealing the tube of the extension tee joint, and the tee joint ports are fully disinfected in each step. Considering that the loop pump pressure before and after the membrane lung is high, up to 200mmHg and even more than 300mmHg, certain challenges are brought to the blood drawing operation of an operator in the operations, and the risk of serious infection is brought to the situation that blood is repeatedly drawn at the three-way joint.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the problems that the structure of the ECMO loop in the prior art is difficult to perform blood drawing operation and can cause infection risk, so as to provide the ECMO loop blood drawing device.

In order to solve the above problems, the present utility model provides an ECMO loop blood drawing device adapted to be mounted on an ECMO loop, including: one end of the connecting pipe is connected to the ECMO loop; the blood suction tube is detachably connected to the other end of the connecting tube; a first branch connected to the blood evacuation tube and forming a first node; the second branch pipe and the third branch pipe are connected in parallel on the blood suction pipe and form a second node, and the first node is positioned between the connecting pipe and the second node; and the cut-off structure is suitable for controlling the opening or closing of the connecting pipe, the blood pumping pipe, the first branch pipe, the second branch pipe and the third branch pipe respectively.

Optionally, the shut-off structure comprises a first flow stop clip mounted on the connecting tube.

Optionally, the shut-off structure comprises a second flow stop clip mounted on the first branch pipe.

Optionally, the shut-off structure includes a third flow stop clip mounted on the blood evacuation tube between the first node and the second node.

Optionally, the intercepting structure comprises a first one-way valve and a second one-way valve, the first one-way valve is arranged on the second branch pipe, and the second one-way valve is arranged on the third branch pipe.

Optionally, the first one-way valve is adapted to prevent liquid in the second branch pipe from flowing from the outer end of the second branch pipe towards the second node; the second one-way valve is adapted to prevent liquid in the third branch from flowing from the second node to the outer end of the third branch.

Optionally, the ECMO loop blood drawing device includes a waste bladder connected to the third branch pipe by a flow guiding structure adapted to open or close an inlet of the waste bladder.

Optionally, the diversion structure is a reversing valve.

Optionally, a first connector is arranged at one end of the connecting pipe, a second connector is arranged on the ECMO loop, and the first connector and the second connector are detachably butted together; the other end of the connecting pipe is provided with a third connector, the end part of the blood drawing pipe is provided with a fourth connector, and the third connector and the fourth connector are detachably butted together.

Optionally, two second connectors are disposed on the ECMO ring.

The utility model has the following advantages:

1. the ECMO loop blood drawing device provided by the utility model comprises: the connecting pipe, the blood pumping pipe, first branch pipe, the second branch pipe, third branch pipe and the structure of closure, the one end of connecting pipe is connected on the ECMO ring road, and blood pumping pipe detachably connects the other end at the connecting pipe, and first branch pipe connection is on the blood pumping pipe and forms first node, and second branch pipe and third branch pipe connect in parallel on the blood pumping pipe and form the second node, and first node is located between connecting pipe and the second node, and the structure of closure is suitable for controlling the opening or closing of connecting pipe, blood pumping pipe, first branch pipe, second branch pipe and third branch pipe respectively.

One end of the connecting pipe is detachably arranged on the ECMO ring, and the blood suction pipe is detachably connected with the other end of the connecting pipe. When the blood drawing operation is carried out, the second branch pipe and the third branch pipe can be closed through the cut-off structure, the first branch pipe is opened, the blood pumping pipe and the blood stasis and heparin water in the connecting pipe are pumped out from the first branch pipe, and the first branch pipe is closed after the blood is full of the blood pumping pipe. And opening the second branch pipe, closing the first branch pipe and the third branch pipe, drawing blood in the blood drawing pipe from the second branch pipe, and closing the second branch pipe after the blood drawing is completed. The second branch pipe and the third branch pipe are opened through the intercepting structure, the blood drawing pipe between the first branch pipe and the first node and the second node is closed, heparin water is driven into and fills the second branch pipe and the third branch pipe through the third branch pipe, then the second branch pipe is closed, the blood drawing pipe between the connecting pipe and the first node and the second node is opened, heparin water is continuously driven into the third branch pipe, and the heparin water flows through the third branch pipe, the second node, the first node and the connecting pipe in sequence until part of heparin water enters an ECMO loop. Finally, the blood drawing tube and the connecting tube can be removed, and a new blood drawing tube is replaced to be connected with the connecting tube.

According to the process, the ECMO loop blood drawing device provided by the utility model can facilitate blood drawing operation of operators, and the blood drawing tube is detachable, so that a new blood drawing tube can be arranged on the connecting tube, repeated utilization of the blood drawing tube is avoided, and the risk of infection is reduced.

2. The utility model provides an ECMO loop blood drawing device, wherein a closure structure comprises a first flow stopping clamp, and the first flow stopping clamp is arranged on a connecting pipe. The first check clip may control the opening and closing of the connection pipe.

3. The utility model provides an ECMO loop blood drawing device, wherein a shutoff structure comprises a second flow stopping clamp, and the second flow stopping clamp is arranged on a first branch pipe. The second flow stop clip may control the opening and closing of the first branch pipe.

4. The utility model provides an ECMO loop blood drawing device, wherein a closure structure comprises a third flow stopping clamp, and the third flow stopping clamp is arranged between a first node and a second node on a blood drawing tube. The third stop clip may control the opening and closing of the blood evacuation tube between the first node and the second node.

5. The ECMO loop blood drawing device comprises a waste liquid bag, wherein the waste liquid bag is connected to the second branch pipe through a flow guiding structure, and the flow guiding structure is suitable for opening or blocking an inlet of the waste liquid bag. When the inlet of the waste liquid bag is opened, the liquid and the gas in the second branch pipe can enter the waste liquid bag.

6. According to the ECMO loop blood drawing device provided by the utility model, one end of the connecting pipe is provided with the first connector, the ECMO loop is provided with the second connector, and the first connector and the second connector are detachably butted together; the other end of the connecting pipe is provided with a third connector, the end part of the blood suction pipe is provided with a fourth connector, and the third connector and the fourth connector are detachably butted together. The connecting pipe can be installed on the ECMO ring through the cooperation of first connector and second connector to can dismantle the change. The blood suction tube can be arranged on the connecting tube through the matching of the third connector and the fourth connector, and can be detached and replaced. The connection tube and/or the blood drawing tube may be replaced after one or more blood drawing operations have been performed, preventing contamination of the blood drawing tube.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an ECMO loop blood drawing device in accordance with an embodiment of the present utility model;

fig. 2 is a schematic diagram of the ECMO loop in an embodiment of the present utility model.

Reference numerals illustrate:

1. a connecting pipe; 2. drawing blood vessels; 21. a first node; 22. a second node; 3. a first branch pipe; 4. a second branch pipe; 5. a third branch pipe; 61. a first stop clip; 62. a second stop clip; 63. a third stop clip; 64. a first one-way valve; 65. a second one-way valve; 7. a waste liquid bag; 71. a reversing valve; 81. a first connector; 82. a second connector; 83. a third connector; 84. a fourth connector; 91. an ECMO loop; 92. and (3) membrane lung.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

The ECMO loop pump pressure before and after the membrane lung is high, up to 200mmHg and even more than 300mmHg, so that certain challenges are brought to the blood drawing operation of the operator in these operations, especially that the registrar is not easy to insert into the EMCO loop, and the risk of serious infection is brought if blood is drawn repeatedly at the three-way interface.

In order to solve the above-mentioned problems, referring to fig. 1, the present utility model provides an ECMO loop blood drawing device, comprising: the connecting pipe 1, the blood drawing pipe 2, the first branch pipe 3, the second branch pipe 4, the third branch pipe 5 and the closure structure, one end of the connecting pipe 1 is connected on the ECMO loop, the blood drawing pipe 2 is detachably connected at the other end of the connecting pipe 1, the first branch pipe 3 is connected on the blood drawing pipe 2 and forms a first node 21, the second branch pipe 4 and the third branch pipe 5 are connected on the blood drawing pipe 2 in parallel and form a second node 22, the first node 21 is positioned between the connecting pipe 1 and the second node 22, and the closure structure is suitable for respectively controlling the opening or closing of the connecting pipe 1, the blood drawing pipe 2, the first branch pipe 3, the second branch pipe 4 and the third branch pipe 5.

The ECMO blood drawing device provided by the utility model can be directly arranged on an ECMO loop, and the connecting pipe 1, the blood drawing pipe 2, the first branch pipe 3, the second branch pipe 4 and the third branch pipe 5 are closed through the cut-off structure. When the blood drawing work is carried out, the method can be carried out according to the following steps:

1. air, blood stasis and heparin water are pumped. The connection pipe 1, the first branch pipe 3, the second branch pipe 4, the third branch pipe 5, and the blood drawing pipe 2 between the first node 21 and the second node 22 are opened by the cut-off structure. Air, blood and heparin water are drawn through the first branch pipe 3 by means of the syringe, which will enter the blood drawing pipe 2 through the connection pipe 1 and enter the first branch pipe 3 through the first node 21 of the blood drawing pipe 2, so that the syringe completely draws out the air, blood and heparin water. While air, blood sludge and heparin water flow, blood also flows along the connecting pipe 1, the blood drawing pipe 2 and the first branch pipe 3 in sequence, and when the blood flows to fill the first branch pipe 3, the first branch pipe 3 is closed by the cut-off structure. At this point, the evacuation, blood stasis and heparin water operations are completed.

2. Blood is drawn. The connection pipe 1, the second branch pipe 4, and the blood drawing pipe between the first node 21 and the second node 22 are opened by the intercepting structure, and the first branch pipe 3 and the third branch pipe 5 are closed. Blood is drawn through the second branch 4 by means of a syringe, and since in the last step the blood fills a portion of the blood drawing vessel between the first node 21 and the second node 22, the air in the second branch 4 needs to be evacuated before the blood is drawn, and the blood is allowed to enter the second branch 4 through the second node 22, after which the blood drawing operation can be performed. After the blood drawing operation is completed, the second branch pipe 4 is closed.

3. Heparin water was injected into the ECMO loop. First, the connection pipe 1, the first branch pipe 3, and the blood drawing pipe 2 between the first node 21 and the second node 22 are closed by the intercepting structure, the second branch pipe 4 and the third branch pipe 5 are opened, heparin water is injected through the third branch pipe 5, and the heparin water enters the second branch pipe 4 through the third branch pipe 5 and passes through the second node, so that no air and residual blood are ensured in the second branch pipe 4, the third branch pipe 5, and part of the blood drawing pipes at the second node 22. And then the second branch pipe 4 is closed, the blood drawing pipe 2 between the first node 21 and the second node 22 is opened, the connecting pipe 1 is opened, heparin water is continuously pumped into the connecting pipe through the third branch pipe 5, and enters an ECMO loop after passing through the second node 22, the first node 21 and the connecting pipe 1, and the connecting pipe 1 and the third branch pipe 5 are closed. And closing the blood drawing tube 2 between the first node 21 and the second node 22.

4. The ECMO loop blood drawing device is replaced. The connection tube 1 is closed by the shut-off structure, after which the blood drawing tube 2 can be detached from the connection tube 1 and replaced with a new blood drawing tube 2.

According to the process, the ECMO loop blood drawing device provided by the utility model can facilitate blood drawing operation of operators, the blood drawing tube 2 can be detached, a new blood drawing tube 2 can be arranged on the connecting tube 1, repeated utilization of the blood drawing tube 2 is avoided, and the risk of infection is reduced.

The connecting tube 1, the blood drawing tube 2, the first branch tube 3, the second branch tube 4 and the third branch tube 5 can be made of medical plastics. In addition to the above operation procedure, those skilled in the art may perform other operations according to actual situations, which are not illustrated herein. In addition to syringes, other infusion devices may be used by those skilled in the art to perform aspiration or infusion procedures.

Referring to fig. 1, in one embodiment of the present utility model, the intercepting structure includes a first flow stop clip 61, and the first flow stop clip 61 is mounted on the connection pipe 1. The first stopper clamp 61 can control the opening and closing of the connection pipe 1.

Referring to fig. 1, in one embodiment of the present utility model, the intercepting structure includes a second flow stopping clip 62, and the second flow stopping clip 62 is mounted on the first branch pipe 3. The second stopper clamp 62 can control the opening and closing of the first branch pipe 3.

Referring to fig. 1, in one embodiment of the present utility model, the shut-off structure includes a third stop clip 63, the third stop clip 63 being mounted between the first node 21 and the second node 22 on the blood evacuation tube 2. Third stop clip 63 may control the opening and closing of suction tube 2 between first node 21 and second node 22.

The first stop clip 61, the second stop clip 62 and the third stop clip 63 may be of a type commonly used in the medical device field, but may be any other device for blocking or opening a pipeline, which is not exemplified here.

Referring to fig. 1, in one embodiment of the present utility model, the intercepting structure includes a first check valve 64 and a second check valve 65, the first check valve 64 being disposed on the second branch pipe 4, and the second check valve 65 being disposed on the third branch pipe 5. The first check valve 64 and the second check valve 65 allow the liquid to flow in the second branch pipe 4 and the third branch pipe 5, respectively, only in a predetermined flow direction.

In one embodiment of the utility model, the first one-way valve 64 is adapted to prevent the flow of liquid in the second branch pipe 4 from the outer end of the second branch pipe 4 towards the second node 22. The second non-return valve 65 is adapted to prevent the flow of liquid in the third branch 5 from the second node 22 towards the outer end of said third branch 5. According to the above, the first check valve 64 prevents the blood from being sucked back into the second branch pipe 4, and the second check valve prevents the heparin water from flowing out of the third branch pipe 5.

Referring to fig. 1, in one embodiment of the present utility model, the ECMO loop blood drawing device comprises a waste bladder 7, the waste bladder 7 being connected to the second branch pipe 4 by a flow guiding structure adapted to open or close an inlet of the waste bladder 7. The waste liquid bag 7 can be a telescopic bag body with a certain volume and can be made of medical plastic materials. When the inlet of the waste liquid bag 7 is opened, the liquid and the gas in the second branch pipe 4 can enter the waste liquid bag 7, wherein the liquid comprises blood and heparin water, and the waste liquid bag 7 can be used for conveniently collecting the waste liquid and the gas, so that the subsequent centralized treatment is facilitated.

In one embodiment of the present utility model, the diversion structure is a reversing valve 71. The reversing valve 71 can be used for communicating the waste liquid bag 7 and the second branch pipe 4 so as to facilitate the collection of the waste liquid by the waste liquid bag 7.

In one embodiment of the utility model, the reversing valve 71 has an operating handle by which the waste liquid bag 7 can be controlled to open or block. An indication arrow can be arranged on the operation handle, when the indication arrow points to the waste liquid bag 7, the waste liquid bag 7 is opened, the outer end of the second branch pipe 4 is closed, and the waste liquid can only flow into the waste liquid bag 7; when the indication arrow points to the outer end of the second branch pipe 4, the waste liquid bag 7 is closed, and the liquid can flow out from the outer end of the second branch pipe 4.

Referring to fig. 1 and 2, in one embodiment of the present utility model, one end of the connection pipe 1 is provided with a first connection head 81, and the ecmo loop 91 is provided with a second connection head 82, and the first connection head 81 and the second connection head 82 are detachably butted together. The other end of the connecting pipe 1 is provided with a third connector 83, the end part of the blood pumping pipe 2 is provided with a fourth connector 84, and the third connector 83 and the fourth connector 84 are detachably butted together.

The connection pipe 1 may be mounted on the ECMO loop 91 by the cooperation of the first connection head 81 and the second connection head 82, and may be detachably replaced. The blood drawing tube 2 can be mounted on the connection tube 1 by the cooperation of the third connector 83 and the fourth connector 84, and can be detachably replaced. The connection tube 1 and/or the blood drawing tube 2 may be replaced after one or more blood drawing operations have been performed, preventing contamination of the blood drawing tube 2.

The first connector 81 and the fourth connector 84 may be male connectors, the second connector 82 and the third connector 83 may be female connectors, and the corresponding male connectors and female connectors are connected or disconnected when in use.

In one embodiment of the utility model, the outer end of the first branch pipe 3 is provided with a fifth connection head 85, the outer end of the second branch pipe 4 is provided with a sixth connection head 86, and the outer end of the third branch pipe 5 is provided with a seventh connection head 87. The fifth, sixth and seventh connectors 85, 86, 87 may be female connectors to facilitate insertion of the syringe tip and withdrawal or injection.

Referring to fig. 2, in one embodiment of the present utility model, two second connectors 82 are provided on the ECMO loop 91. In fig. 2, the membrane lung 92 is schematically shown, and the two second connectors 82 are respectively located on the ECMO loop 91 before and after the membrane lung 92, so that the connection tube 1 of the ECMO loop blood drawing device can be connected to the corresponding second connectors 82 to selectively draw the blood before the membrane lung or the blood after the membrane lung during the blood drawing operation.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (10)

1. An ECMO loop blood drawing apparatus adapted to be mounted on an ECMO loop, comprising:

a connecting pipe (1), wherein one end of the connecting pipe (1) is connected to the ECMO loop (91);

the blood suction tube (2) is detachably connected to the other end of the connecting tube (1);

a first branch (3), said first branch (3) being connected to said blood drawing tube (2) and forming a first node (21);

a second branch pipe (4) and a third branch pipe (5), wherein the second branch pipe (4) and the third branch pipe (5) are connected in parallel on the blood drawing pipe (2) and form a second node (22), and the first node (21) is positioned between the connecting pipe (1) and the second node (22);

and the cut-off structure is suitable for controlling the opening or closing of the connecting pipe (1), the blood drawing pipe (2), the first branch pipe (3), the second branch pipe (4) and the third branch pipe (5) respectively.

2. ECMO loop blood drawing device according to claim 1, characterized in that the shut-off structure comprises a first flow stop clip (61), the first flow stop clip (61) being mounted on the connection tube (1).

3. ECMO loop blood drawing device according to claim 1, characterized in that the shut-off structure comprises a second flow stop clip (62), the second flow stop clip (62) being mounted on the first branch (3).

4. ECMO loop blood drawing device according to claim 1, characterized in that the shut-off structure comprises a third flow stop clip (63), the third flow stop clip (63) being mounted between the first node (21) and the second node (22) on the blood drawing tube (2).

5. ECMO loop blood drawing device according to claim 1, characterized in that the shut-off structure comprises a first one-way valve (64) and a second one-way valve (65), the first one-way valve (64) being arranged on the second branch (4), the second one-way valve (65) being arranged on the third branch (5).

6. The ECMO loop blood drawing device according to claim 5, characterized in that the first one-way valve (64) is adapted to prevent the liquid in the second branch pipe (4) from flowing from the outer end of the second branch pipe (4) towards the second node (22); the second non-return valve (65) is adapted to prevent liquid in the third branch (5) from flowing from the second node (22) towards the outer end of the third branch (5).

7. ECMO loop blood drawing device according to any one of claims 1 to 6, characterized in that it comprises a waste fluid bladder (7), which waste fluid bladder (7) is connected to the second branch pipe (4) by a flow guiding structure adapted to open or close off an inlet of the waste fluid bladder (7).

8. The ECMO loop blood drawing device of claim 7, characterized in that the flow directing structure is a reversing valve (71).

9. ECMO loop blood drawing device according to claim 1, characterized in that one end of the connecting tube (1) is provided with a first connector (81), the ECMO loop (91) is provided with a second connector (82), the first connector (81) and the second connector (82) are detachably butted together; the other end of the connecting pipe (1) is provided with a third connector (83), the end part of the blood drawing pipe (2) is provided with a fourth connector (84), and the third connector (83) and the fourth connector (84) are detachably connected together in a butt joint mode.

10. ECMO loop blood drawing device according to claim 9, characterized in that two of the second connectors (82) are provided on the ECMO loop (91).