CN219001399U - Extracorporeal blood transfusion device - Google Patents

Abstract

The present utility model provides an extracorporeal blood transfusion device comprising: a return line and a filter device; the two ends of the return pipeline are respectively used for connecting an artery and a vein so as to return blood in the artery to the vein; the filtering device is arranged in the return pipeline and is used for filtering thrombus or fragments in blood flowing out of the artery. The body transfusion device provided by the utility model is applied to the reflux protection in operation, so that thrombus can be prevented from being formed due to long operation time, and the residual thrombus which is not sucked out can be prevented from being flushed into intracranial tiny blood vessels after the proximal end blocking is relieved.

Description

Extracorporeal blood transfusion device

Technical Field

The utility model relates to the technical field of medical treatment, in particular to an extracorporeal blood transfusion device.

Background

The incidence of intravascular diseases is increasing, wherein intravascular stenoses occupy a significant portion of cases, whether heart, coronary, cerebral or peripheral.

At present, there are two main modes of treating carotid stenosis, one is to perform surgery, dissect carotid artery, perform Carotid Endarterectomy (CEA), and the other is to perform minimally invasive surgery, and place a stent at carotid artery through femoral artery access for carotid artery reconstruction (CAS), where the risk of the former surgery is high, and the latter needs to place protection devices such as protection umbrellas in advance at the distal end of carotid artery on lesion side in advance, so as to prevent the plaque in lesion area from falling off to form thrombus in subsequent operations such as placing the stent or other instruments through the lesion area, and the thrombus is flushed by blood to the distal end to enter into intracranial finer blood vessels, resulting in more serious stroke, high operation difficulty coefficient and to improve the anti-embolism effect.

In addition, there is currently a new carotid artery reconstructive procedure (TCAR) that achieves a proximal protection against the escape of thrombus debris by creating a countercurrent flow of blood at the carotid artery. Specifically, the normal flow direction of intracranial blood vessels is: from the aortic arch, blood flows into the left and right common carotid arteries, respectively, and then into the cranium, and the left and right common carotid arteries communicate through the intracranial willis ring (willis ring). When one side is in poor blood supply, the other side can be in reverse flow for supplementing a part of blood. The proximal protection of the carotid artery is formed by the blood vessel and the blood flow direction of the human body. Specifically, the bottom of the common carotid artery is plugged by means of a balloon or an exposed and fastened manner (the former has smaller wound on the carotid artery and smaller nerve injury compared with the latter), the blood flow direction at the internal carotid artery at the side is changed from upward flow to downward flow, and after the blood flows to the plugging position, the subsequent blood flow at the position is stopped due to the plugging of the blood flow channel, namely, the blood is stopped at the focal section, so that the fallen thrombus can be prevented from being flushed to intracranial finer blood vessels by the blood. However, the blood in the focal zone has too long dead time and can promote thrombus formation, so that the operation time is limited, and the shed thrombus can only be carried out by a blood drawing way at the focal zone, so that residual thrombus which is not sucked out can be still flushed into intracranial tiny blood vessels after the proximal occlusion is relieved.

Disclosure of Invention

The present utility model aims to provide an extracorporeal blood transfusion device which solves one or more problems in carotid artery reconstruction.

In order to solve the above-described problems, the present utility model provides an extracorporeal blood transfusion apparatus comprising: a return line and a filter device;

the two ends of the return pipeline are respectively used for connecting an artery and a vein so as to return blood in the artery to the vein;

the filtering device is arranged in the return pipeline and is used for filtering thrombus or fragments in blood flowing out of the artery.

Optionally, in the extracorporeal blood transfusion device, the extracorporeal blood transfusion device further comprises a flow rate adjusting device, and the flow rate adjusting device is arranged on the return pipeline and used for adjusting the flow rate of blood flowing through the return pipeline.

Optionally, in the extracorporeal blood transfusion device, the reflux line includes a first line, a second line, and an extension line, where the extension line is connected to two ends of the first line, so as to be respectively used for connecting the artery and the vein, and two ends of the second line are respectively communicated with the first line at a side wall of the first line; the loss of resistance of blood flow along the second line is greater than the loss of resistance of blood flow along the first line;

the flow regulating device is used for blocking the circulation of blood in the first pipeline and/or the second pipeline so as to regulate the flow of blood flowing through the return pipeline.

Optionally, in the extracorporeal blood transfusion device, the pipe diameter of the first pipeline is larger than the pipe diameter of the second pipeline.

Optionally, in the extracorporeal blood transfusion device, the flow regulating device includes a valve and a valve position regulating structure, a part of the valve is disposed in the first pipeline, and the valve position regulating structure is used for driving the valve to move in the first pipeline so as to block the circulation of blood in the first pipeline and/or the second pipeline.

Optionally, in the extracorporeal blood transfusion device, the valve position adjusting structure includes a connecting rod structure, the connecting rod structure includes a first joint and a second joint, the second joint is connected with the valve through the first joint, one end of the second joint is limited to linearly move, the other end is rotatably connected with the first joint, and one end of the second joint drives the first joint to rotate when linearly moving.

Optionally, in the extracorporeal blood transfusion device, the connecting rod structure further comprises a rotating shaft, and the other end of the second joint is rotatably connected with the first joint through the rotating shaft; or alternatively, the process may be performed,

the first joint with the one end that the second joint is connected has circular boss, the other end of second joint has the recess, circular boss block in the recess, make the second joint with first joint rotationally connects.

Optionally, in the extracorporeal blood transfusion device, the extracorporeal blood transfusion device further comprises a limiting piece, the limiting piece is provided with a linear limiting groove, and one end of the second joint moves linearly in the linear limiting groove.

Optionally, in the extracorporeal blood transfusion device, the valve position adjusting structure further comprises a driving member, and the driving member is used for driving one end of the second joint to linearly move.

Optionally, in the extracorporeal blood transfusion device, the filtering device comprises a front end frustum with a through hole and a rear end filter screen framework with an internal conical groove, wherein the front end frustum is fixed in the first pipeline, and the front end frustum is connected with the internal conical groove in a matched manner.

Optionally, in the extracorporeal blood transfusion device, the first pipeline includes a main body pipe section, an extension pipe section and a sealing ring, the front end cone is fixed in the main body pipe section, the sealing ring is arranged between the main body pipe section and the front end cone, and the extension pipe section is detachably connected with the main body pipe section after axially extruding the sealing ring.

In summary, the extracorporeal blood transfusion device provided by the present utility model includes: a return line and a filter device; the two ends of the return pipeline are respectively used for connecting an artery and a vein so as to return blood in the artery to the vein; the filtering device is arranged in the return pipeline and is used for filtering thrombus or fragments in blood flowing out of the artery. The body transfusion device provided by the utility model is applied to the reflux protection in operation, so that thrombus formation caused by too long operation time can be avoided, and the phenomenon that residual thrombus or fragments which are not sucked out are flushed into intracranial tiny blood vessels after the proximal end blocking is relieved can be avoided.

Drawings

Fig. 1 is a schematic diagram of connection between an extracorporeal blood transfusion device and an artery and vein according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of an extracorporeal blood transfusion apparatus according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of another extracorporeal blood transfusion apparatus according to an embodiment of the present utility model;

FIGS. 4a to 4c are schematic views showing three states of an extracorporeal delivery apparatus according to an embodiment of the present utility model;

FIG. 5 is a schematic view of the extracorporeal blood transfusion apparatus shown in FIG. 3 after the casing is attached;

FIG. 6 is a schematic view of the extracorporeal blood transfusion apparatus shown in FIG. 2 after the casing is attached;

fig. 7 is a schematic diagram of a pipeline plugging of an extracorporeal conveying device according to an embodiment of the present utility model;

FIG. 8 is a schematic view showing a connection mode of the first joint and the second joint according to the embodiment of the present utility model

FIG. 9a is a schematic view of a first joint according to an embodiment of the present utility model;

FIG. 9b is a schematic diagram illustrating a connection manner between the first joint and the second joint shown in FIG. 9 a;

FIG. 10 is a schematic view of an arrangement of linear limit grooves in an embodiment of the present utility model;

FIG. 11 is a schematic diagram of a filter device according to an embodiment of the present utility model;

wherein, each reference sign is explained as follows:

1-an extracorporeal blood transfusion device; 2-artery; 3-balloon catheter; 4-vein; 5-sheath;

11-a first line; 12-a second pipeline;

130-valve; 131-first joint; 132-second joint; 133-a spindle; 134-handle;

14-a housing;

15-limiting blocks;

151-linear limit grooves;

1311-circular boss; 1321-groove;

161-front end frustum; 162-a rear end filter screen framework;

111-a main body pipe section, 112-an extension pipe section; 113-sealing ring.

Detailed Description

The utility model is described in further detail below with reference to the drawings and the specific examples. The advantages and features of the present utility model will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments. It should be further understood that the terms "first," "second," "third," and the like in this specification are used merely for distinguishing between various components, elements, steps, etc. in the specification and not for indicating a logical or sequential relationship between the various components, elements, steps, etc., unless otherwise indicated.

Referring to fig. 1, an embodiment of the present utility model provides an extracorporeal blood transfusion apparatus 1, the extracorporeal blood transfusion apparatus 1 including: a return line and a filter device; the two ends of the return pipeline are respectively used for connecting an artery 2 and a vein 4 so as to return blood in the artery to the vein 4; the filtering device is arranged in the return line and is used for filtering thrombus in blood flowing out of the artery 2.

When the extracorporeal blood transfusion device 1 provided by the embodiment of the utility model is applied to TCAR, one end of a reflux pipeline of the extracorporeal blood transfusion device 1 is connected to an artery 2 (specifically connected to a focal zone), and the other end of the reflux pipeline is connected to a vein 4, so that the pressure difference between the artery and the vein can be utilized, the blood in the focal zone, which is blocked and stagnated, can flow to the vein 4, and thrombus falling off from the focal zone can be recovered through a filtering device in the process of flowing to the vein 4, so that thrombus in the blood can be prevented from flowing to the vein, thrombus formed due to too long TCAR time can be avoided, and the thrombus which is not sucked out after the proximal blocking is relieved can be prevented from being flushed into intracranial tiny blood vessels.

The extracorporeal blood transfusion device provided by the embodiment of the utility model, one end (hereinafter referred to as arterial end) of the return line for connecting with an artery can be selectively connected with a bleeding port of the balloon catheter 3 or a sheath penetrating into the artery (shown in fig. 1, the connection is made by way of example with the balloon catheter 3), and one end (hereinafter referred to as venous end) of the return line for connecting with a vein can be connected with a side branch of the sheath 5 penetrating into the vein, so that connection of two ends of the return line with the artery 2 and the vein 4 respectively is completed, and a complete arteriovenous extracorporeal circuit is formed.

Specifically, when the arterial sheath puncture is adopted to be matched with the balloon catheter 3 for carotid artery occlusion, the arterial end of the reflux pipeline can be connected with a blood return channel reserved by the balloon catheter 3; when the common carotid artery is exposed by cutting the neck, the tail of the common carotid artery is tightly tied for plugging, a sheath tube is punctured above the plugging point, and the arterial end of the return pipeline can be connected with the sheath tube. In addition, the vein 4 connected to the venous end of the return line may be not only a femoral vein but also another vein such as a jugular vein, but the femoral vein may be preferentially used because the femoral vein is thick and positioned appropriately, and thus the risk of puncture may be reduced.

Preferably, the extracorporeal blood transfusion device further comprises a flow rate adjusting device provided in the return line for adjusting the flow rate of blood flowing through the return line.

Further, referring to fig. 2 and 3, the return line includes a first line 11, a second line 12 and an extension line (not shown). The extension pipe is connected to two ends of the first pipe 11, and is used for connecting the artery 2 and the vein 4, and the specific connection manner is described in detail in the previous section and is not described herein again; two ends of the second pipeline 12 are respectively communicated with the first pipeline 11 at the side wall of the first pipeline 11; the first and second lines 11, 12 are configured such that the loss of resistance of blood flow through the second line is greater than the loss of resistance of blood flow through the first line; the flow regulating means serve to block the flow of blood in the first line 11 and/or the second line 12.

The reflux pipeline adopts the design of double pipelines and the use of the flow regulating device, so that the blood flow reflux flow of the extracorporeal blood transfusion device can be regulated to match different stages and different use scenes of the operation.

By blocking the first line 11 and/or the second line 12 by the flow regulating device, the entire return line can be brought into three states. The method comprises the following steps:

(1) As shown in fig. 4a, when the flow regulating device simultaneously blocks the first line 11 and the second line 12, the entire return line is in a closed state;

(2) As shown in fig. 4b, when the flow regulating device blocks only said first line 11, the whole return line is in a low flow state;

(3) As shown in fig. 4c, when the flow regulating device blocks only said second line 12, the entire return line is in a high flow state.

The switching process of different states of the return pipeline is as follows:

firstly, the return pipeline is adjusted to a closed state, then the arterial end of the return pipeline is connected to a bleeding port of a sheath pipe or a balloon catheter which is penetrated into the carotid artery through a luer connector or other sealing connectors, the return pipeline is adjusted to a low flow state, air in the return pipeline is slowly discharged, and after the air in the pipeline is completely discharged, the venous end for the return pipeline is connected into the sheath pipe which is penetrated into the vein. Finally, the reflux pipeline is regulated to a high flow state, and the high flow state is kept all the time in the operation process, so that the probability of thrombus formation due to blood stagnation or low-speed flow in the pipeline is reduced.

In order to make the loss of resistance of blood flowing through the second conduit greater than the loss of resistance of blood flowing through the first conduit, in this embodiment, the first conduit preferably has a larger pipe diameter than the second conduit, as shown in fig. 4 a-4 c. When the pipe diameters of the whole pipe bodies are consistent, no elbow or reducing part is present to cause pressure loss, and the smooth blood flow can be better ensured. In particular, in the high flow state, the size and shape of the return pipeline can be kept uniform, deformation caused by changing the pipeline can not occur, the return effect in the high flow state in the operation process is ensured, and the performance of the whole device is improved.

Further, in the present embodiment, referring to fig. 5 and 6, the flow adjusting device includes a valve 130 and a valve position adjusting structure, wherein a portion of the valve 130 is disposed in the first pipeline 11, and the valve position adjusting structure is used for driving the valve 130 to move in the first pipeline 11 so as to block the blood flowing in the first pipeline 11 and/or the second pipeline 12.

As shown in fig. 7, when the valve 130 is moved to block the region a of the first line 11 (i.e., the region where the return blood just enters the first line 11), the entire return line is in a closed state, when the valve 130 is moved to block the region B of the first line 11 (i.e., the region communicating with the second line 12), the entire return line is in a high flow state, and when the valve 130 is moved to block the region C of the first line 11 (i.e., the region where the return blood flows through the communicating region), the entire return line is in a low flow state.

Still further, in this embodiment, please continue to refer to fig. 2 and 3, the valve position adjusting structure includes a connecting rod structure, the connecting rod structure includes a first joint 131 and a second joint 132, the second joint 132 is connected to the valve through the first joint 131, one end of the second joint 132 is limited to move linearly, the other end is rotatably connected to the first joint 131, and one end of the second joint 132 drives the first joint 131 to rotate when moving linearly, so as to drive the valve 130 to move in the first pipeline 11.

In an alternative embodiment, as shown in fig. 8, the link structure further includes a rotation shaft 133, and the other end of the second joint 132 and the first joint 131 are rotatably connected through the rotation shaft 133. Therefore, when one end of the second joint 132 moves linearly, the first joint 131 rotates with the rotating shaft 133 as a fulcrum, so as to drive the valve 130 to move in the first pipeline 11.

In another alternative embodiment, as shown in fig. 9a and 9b, one end of the first joint 131 connected to the second joint 132 has a circular boss 1311, the other end of the second joint 132 has a groove 1321, and the circular boss 1311 is snapped into the groove 1321, so that the first joint 131 and the second joint 132 are rotatably connected. When the second joint 132 moves linearly, the circular boss 1311 is driven to rotate, so that the entire first joint 131 rotates to drive the valve 130 to move in the first pipeline 11. Compared with the previous embodiment, the size of each part can be larger under the limit of the whole size due to the elimination of the rotating shaft 133, so that higher strength is ensured, and the stability of functions is realized.

Optionally, referring to fig. 10, the extracorporeal blood transfusion apparatus provided in this embodiment further includes a limiting member, where the limiting member has a linear limiting groove 151, and one end of the second joint 132 moves linearly in the linear limiting groove 151. In an embodiment, referring to fig. 6, the limiting member may be a limiting member 15 fixed on an outer surface of the first pipeline 11, a side of the limiting member 15 away from the first pipeline 11 has a linear limiting groove 151, and one end of the second joint 132 is slidably disposed in the linear limiting groove 151.

In other embodiments, as shown in fig. 5, the stopper may be implemented by a housing 14 fixed to the outer circumference of the first pipe 11, the housing 14 having a linear stopper groove 151 on an inner surface thereof, and one end of the first joint 131 being slidably disposed in the linear stopper groove 151. It should be understood that, as shown in fig. 6, when the linear limit groove 151 is provided with the limit block 15, the extracorporeal blood transfusion apparatus may also include the housing 14, in which case the housing 14 protects the entire structure.

In addition, optionally, referring to fig. 2 and 3 again, the valve position adjusting structure further includes a driving member 134, where the driving member 134 is configured to drive the first joint 131 to move linearly. The driving member 134 may be, for example, a handle, and the first joint 131 may be linearly moved by pushing the handle. When the extracorporeal blood transfusion device comprises a housing 14, a through groove can be arranged on the housing 14, and a handle is arranged on the outer surface of the housing 14 and is connected with the first joint 131 through the through groove so as to facilitate operation.

As described above, the filtering device is disposed in the return line, specifically referring to fig. 11, the filtering device includes a front end cone 161 having a through hole and a rear end filter screen skeleton 162 having an inner cone groove, the front end cone 161 is fixed in the first line 11, and the front end cone 161 and the inner cone groove are connected in a matching manner.

Preferably, the first pipeline 11 includes a main body pipe section 111, an extension pipe section 112, and a sealing ring 113, the front end frustum 161 is fixed in the main body pipe section 111, the sealing ring 113 is disposed between the main body pipe section 111 and the front end frustum 161, and the extension pipe section 112 is detachably connected with the main body pipe section 111 after axially extruding the sealing ring 113. The seal ring 113 is, for example, a silicone ring, and fills the gap between the main pipe section 111 and the front end taper after being pressed by the extension pipe section 112, thereby achieving an overall sealing effect.

The main body pipe section 111 and the extension pipe section 112 may be detachably connected by a threaded connection, but the present application is not limited thereto. The detachable connection of the main body section 111 and the extension section 112 facilitates the placement of the filtering device in the first conduit 11 and also facilitates the post-operative observation of thrombus retrieved by the filtering gate placement 16.

In summary, the extracorporeal blood transfusion device provided in the embodiment of the present utility model includes: a return line and a filter device; the two ends of the return pipeline are respectively used for connecting an artery and a vein so as to return blood in the artery to the vein; the filtering device is arranged in the return pipeline and is used for filtering thrombus or fragments in blood flowing out of the artery. The body transfusion device provided by the embodiment of the utility model is applied to the reflux protection in operation, so that thrombus can be prevented from being formed due to long operation time, and the residual thrombus which is not sucked out can be prevented from being flushed into intracranial tiny blood vessels after the proximal end blocking is removed.

The above description is only illustrative of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.

Claims (11)

1. An extracorporeal blood transfusion apparatus, comprising: a return line and a filter device;

the two ends of the return pipeline are respectively used for connecting an artery and a vein so as to return blood in the artery to the vein;

the filtering device is arranged in the return pipeline and is used for filtering thrombus or fragments in blood flowing out of the artery.

2. The extracorporeal blood transfusion apparatus as claimed in claim 1, further comprising a flow rate adjustment device provided to the return line for adjusting a flow rate of blood flowing through the return line.

3. The extracorporeal blood transfusion apparatus as set forth in claim 2, wherein the return line includes a first line, a second line, and an extension line connected to both ends of the first line for connecting the artery and the vein, respectively, both ends of the second line being communicated with the first line at side walls of the first line, respectively; the loss of resistance of blood flow along the second line is greater than the loss of resistance of blood flow along the first line;

the flow regulating device is used for blocking the circulation of blood in the first pipeline and/or the second pipeline so as to regulate the flow of blood flowing through the return pipeline.

4. An extracorporeal blood transfusion apparatus as claimed in claim 3, wherein the tube diameter of the first tube is larger than the tube diameter of the second tube.

5. An extracorporeal blood transfusion apparatus as claimed in claim 3 wherein the flow regulating means comprises a valve and a valve position adjustment structure, part of the valve being provided in the first conduit, the valve position adjustment structure being for driving the valve to move in the first conduit to block blood flow in the first conduit and/or the second conduit.

6. The extracorporeal blood transfusion apparatus as claimed in claim 5, wherein the valve position adjustment structure includes a link structure including a first joint and a second joint, the second joint being connected to the valve by the first joint, one end of the second joint being restricted to linear movement, the other end being rotatably connected to the first joint, one end of the second joint being linearly moved to drive the first joint to rotate.

7. The extracorporeal blood transfusion apparatus as claimed in claim 6, wherein the link structure further includes a rotation shaft through which the other end of the second joint is rotatably connected with the first joint; or alternatively, the process may be performed,

the first joint with the one end that the second joint is connected has circular boss, the other end of second joint has the recess, circular boss block in the recess, make the second joint with first joint rotationally connects.

8. The extracorporeal blood transfusion apparatus of claim 6, further comprising a stopper having a linear stopper groove, wherein one end of the second joint moves linearly in the linear stopper groove.

9. The extracorporeal blood transfusion apparatus of claim 6, wherein the valve position adjustment structure further comprises a driving member for driving one end of the second joint to move linearly.

10. An extracorporeal blood transfusion apparatus as claimed in claim 3, wherein the filtration apparatus comprises a front end frustum with a through hole and a rear end filter screen skeleton with an internal taper groove, the front end frustum being fixed in the first pipeline, the front end frustum and the internal taper groove being connected in a mating manner.

11. The extracorporeal blood transfusion apparatus as claimed in claim 10, wherein the first pipeline includes a main body pipe section, an extension pipe section, and a seal ring, the front end cone is fixed in the main body pipe section, the seal ring is disposed between the main body pipe section and the front end cone, and the extension pipe section is detachably connected with the main body pipe section after the seal ring is pressed in an axial direction.

Images