CN115531646A - Peripheral artery intubation tube - Google Patents

Abstract

The application provides a peripheral artery cannula, which comprises a first tube body, a second tube body and a third tube body, wherein the first tube body, the second tube body and the third tube body are sequentially connected and form a through perfusion channel; the connecting part of the first pipe body and the second pipe body is provided with a preset bending angle; on the outer wall of the peripheral arterial cannula there is a guide groove extending from the distal end of the first tube to the connection portion for providing a blood perfusion in the opposite direction to the insertion direction. The application provides a peripheral artery intubate can avoid effectively because of the reverse problem of filling the passageway jam that causes vasoconstriction or spasm such as the reason such as pain, discomfort, has guaranteed effectively to carry out the patency of blood supply to the end.

Description

Peripheral artery intubation tube

Technical Field

The application relates to the technical field of medical equipment, in particular to a peripheral arterial cannula capable of realizing bidirectional perfusion.

Background

ECMO (extracorporeal Membrane oxygenation) is a method for realizing extracorporeal circulation of blood, and is widely applied to providing emergency extracorporeal circulation support for various heart failure patients and various open-heart surgeries. When ECMO operation is carried out, venous blood needs to be led out of the body, and is perfused and re-injected into peripheral arteries such as femoral artery and the like through intubation after oxygenation of an artificial heart and lung bypass, so that the oxygenation blood supply of human tissues is maintained by using extracorporeal circulation.

In the peripheral arterial cannulation perfusion, blood generally needs to be infused to the proximal end through the peripheral arterial blood vessel (i.e. perfusion is performed according to the retrograde direction of the blood), and the cannulation blocks the peripheral arterial blood vessel at the puncture position, so that blood flowing to the distal end such as the lower limb anterograde is reduced in general, and ischemia and even local tissue necrosis are caused in severe cases.

To solve the above problems, there are various cannulas capable of performing bidirectional perfusion, for example, the patent application No. 201280027491.8 provides a bidirectional perfusion cannula, which provides blood supply in the direction opposite to the insertion direction through a second opening disposed at the elbow of the cannula extension tube; for another example, patent application No. 202080093579.4 provides a bidirectional arterial cannula for extracorporeal membrane lung oxygenation that adds a reciprocally movable retrograde perfusion cannula in the portion of the main cannula inserted into the blood vessel, which when in the extended position, provides blood supply in a direction opposite to the direction of insertion of the main cannula.

However, the bidirectional arterial cannula provided by the above prior art often needs to additionally open at least one opening on the wall of the cannula on the basis of the blood perfusion outlet of the cannula to form a second channel in the opposite direction outside the perfusion channel in the insertion direction, the opening is generally located in the blood vessel near the puncture site and faces the opposite direction to the insertion direction, and during the actual insertion and perfusion process, the blood vessel of the patient may contract, spasm, etc. due to pain, discomfort, etc., so that the blood vessel wall blocks the additional opening. Additionally, the additional opening of the cannula may cause unintended blood flow, such as from the blood vessel into the cannula during insertion of the cannula, or from the cannula into the extravascular tissue during withdrawal of the cannula, etc.

Disclosure of Invention

To solve the above problems in the prior art, the present application aims to provide a peripheral arterial cannula capable of guiding blood smoothly for bidirectional perfusion and minimizing various unexpected blood flow conditions during insertion and withdrawal of the cannula.

The embodiment of the application can be realized by the following technical scheme:

a peripheral artery cannula comprises a first tube body, a second tube body and a third tube body which are sequentially connected and form a through perfusion channel, wherein the distal end of the first tube body is provided with a first hole, the proximal end of the third tube body is provided with a second hole, and the first tube body is used for being inserted into a peripheral artery vessel and providing blood perfusion towards the insertion direction through the first hole; the connecting part of the first pipe body and the second pipe body is provided with a preset bending angle; on the outer wall of the peripheral arterial cannula there is a guide groove extending from the distal end of the first tube to the connection portion for providing a blood perfusion in the opposite direction of the insertion direction.

Further, the guide groove has a first opening facing an insertion direction at a distal end of the first tube; and the guide groove has a second opening facing a direction opposite to the insertion direction at the connection portion.

Preferably, the second opening is located at a transition point between the connecting portion and the second pipe body.

Preferably, the guide groove has a plurality of grooves arranged at intervals along the circumferential direction of the outer wall of the first pipe body.

Preferably, the guide groove extends helically along the outer wall of the peripheral arterial cannula.

Further, an elastic reinforcing wire extending spirally is arranged between the inner wall and the outer wall of the peripheral arterial cannula.

Preferably, the resilient reinforcement wire extends between an inner wall and an outer wall of the second tube.

Preferably, the connecting portion is elastically deformable.

Preferably, the pipe diameter of the filling channel gradually enlarges along the second pipe body to the third pipe body.

The application provides a peripheral artery intubate through the mode guide blood that sets up sunken guiding groove at the body outer wall to carry out blood perfusion to the opposite direction of inserting, compares in the various modes that set up the trompil that runs through the pipe wall on the body additionally of current, can avoid effectively because of painful, uncomfortable etc. causes the problem that trompil is covered or is blockked up when vasoconstriction or spasm, has guaranteed effectively to carry out the unobstructed nature of blood supply to the end.

Drawings

FIG. 1 is a side cross-sectional view of a peripheral arterial cannula according to some preferred embodiments of the present application;

FIG. 2 isbase:Sub>A cross-sectional view A-A ofbase:Sub>A peripheral arterial cannula according to some preferred embodiments of the present application;

FIG. 3 isbase:Sub>A cross-sectional view A-A ofbase:Sub>A peripheral arterial cannula according to some preferred embodiments of the present application;

FIG. 4 is a schematic illustration of peripheral arterial perfusion according to the peripheral arterial cannula of FIG. 1;

FIG. 5 is a side cross-sectional view of a peripheral arterial cannula according to some preferred embodiments of the present application;

FIG. 6 is a schematic illustration of peripheral arterial perfusion according to the peripheral arterial cannula of FIG. 5;

FIG. 7 isbase:Sub>A sectional view A-A ofbase:Sub>A peripheral arterial cannula according to some preferred embodiments of the present application;

fig. 8 is a side view of a peripheral arterial cannula according to some preferred embodiments of the present application.

Reference numerals in the figures

11: first tube, 12: second tube, 13: third pipe, 14: a first hole; 15: a second hole; 16: a perfusion channel; 17: elastic reinforcing wire, 20: connecting part, 30: guide groove, 31: first opening, 32: second opening, 40: peripheral arterial blood vessels.

Detailed Description

Hereinafter, the present application will be further described based on preferred embodiments with reference to the accompanying drawings.

In addition, various components on the drawings are enlarged or reduced for convenience of understanding, but this is not intended to limit the scope of the present application.

Singular references also include plural references and vice versa.

In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually arranged when the products of the embodiments of the present application are used, the description is only for convenience and simplicity, but the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, the application cannot be construed as being limited. Moreover, the terms first, second, etc. may be used in the description to distinguish between different elements, but these should not be limited by the order of manufacture or by importance to be understood as indicating or implying any particular importance, and their names may differ from their names in the detailed description of the application and the claims.

The terminology used in the description presented herein is for the purpose of describing embodiments of the application and is not intended to be limiting of the application. It is also to be understood that, unless otherwise expressly stated or limited, the terms "disposed," "connected," and "connected" are intended to be open-ended, i.e., may be fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present application will be specifically understood by those skilled in the art.

Fig. 1 shows a side cross-sectional view of a peripheral arterial cannula provided according to some embodiments of the present application, as shown in fig. 1, the peripheral arterial cannula includes a first tube 11, a second tube 12 and a third tube 13 connected in sequence, and the interiors of the first tube 11, the second tube 12 and the third tube 13 are communicated with each other, so as to form a perfusion channel 16 for perfusion of blood.

Further, in some embodiments, as shown in fig. 1, the filling channel 16 forms openings at the ends of the first tube 11 and the third tube 13, respectively, and specifically, has a first hole 14 at the distal end of the first tube 11 and a second hole 15 at the proximal end of the third tube 13.

In the case of extracorporeal membrane oxygenation, the third tube 13 is connected to the ECMO system via a connector, and the first tube 11 is inserted into the peripheral arterial vessel 40 by puncturing, so that blood oxygenated by the extracorporeal membrane enters from the second hole 15, flows through the perfusion channel 16 and then flows out from the first hole 14, thereby providing the peripheral arterial vessel 40 with perfusion of blood in the direction of insertion (the direction indicated by S in fig. 1).

In some embodiments, the peripheral arterial cannula may be integrally formed by a liquid dip molding process using various materials known to those skilled in the art for manufacturing medical cannulae, including but not limited to silicone, polyurethane (PU), polyvinyl chloride (PVC), silicone, rubber, and the like.

In other embodiments, different materials may be used to separately manufacture the portions of the peripheral arterial cannula and assembled by bonding or the like. For example, the first tube 11 may be made of a harder material to facilitate the intubation puncturing operation, while the second tube 12 is made of a softer and more resilient material than the first tube 11 to meet the shape adaptation of the peripheral arterial vessel 40 and to ensure flexible operation during puncturing, while avoiding blockage of blood flow due to excessive bending of the tubes.

Further, in some embodiments, as shown in fig. 1, the connection portion 20 between the first tube 11 and the second tube 12 has a preset bending angle, and in some preferred embodiments, the bending angle is set to 135 ° ± 15 °, and the connection portion 20 is configured to be bent, so as to better adapt to peripheral arterial blood vessels 40 with various bending forms, so that the insertion operation of the first tube 11 is more convenient.

Further, in some embodiments, as shown in fig. 1, on the outer wall of the peripheral arterial cannula, there is also a guide slot 30 extending from the distal end of the first tube 11 to the connection portion 20 for providing blood perfusion in the direction opposite to the insertion direction (the direction pointed by S' in fig. 1). The guide groove 30 has a first opening 31 facing the insertion direction at the distal end of the first tube 11, and a second opening 32 facing the opposite direction of the insertion direction at the connection portion 20.

Fig. 2 and 3 each showbase:Sub>A cross-sectional view of the first tube 11 along the directionbase:Sub>A-base:Sub>A in some specific embodiments, and fig. 2 differs from fig. 3 mainly in that the inner wall of the first tube 11 in fig. 2 is somewhat constricted for fitting the guide groove 30, so that the cross-sectional area of the pouring channel 16 at the first tube 11 is smaller than that at the second tube 12.

Fig. 4 shows a schematic diagram of peripheral arterial perfusion using the peripheral arterial cannula shown in fig. 1, which is punctured with a tool such as a stylet so that the first tube 11 is inserted into the peripheral arterial vessel 40 from the insertion site P and directed in the S direction, generally the S direction is directed in the heart direction, and after withdrawal of the stylet, blood oxygenated by the external membrane lung passes through the perfusion channel 16, flows out of the first hole 14 and is perfused in the S direction. Meanwhile, since the outer wall of the first tube 11 is substantially attached to the inner wall of the peripheral artery 40, the guide groove 30 and the inner wall of the peripheral artery 40 form a through blood passage, and blood flowing out of the first hole 14 flows in from the first opening 31 under pressure and flows out from the second opening 32 after passing through the blood passage, thereby realizing blood perfusion toward the S' direction.

It can be seen from combining fig. 2 to 4 that the technical scheme who sets up the guide slot on the outer wall of intubate that this application embodiment adopted compares in the current various technical scheme who pours in order to carry out the opposite direction of inserting the direction through trompil on the pipe wall of intubate, can guarantee the unobstructed of reverse pouring way better, and its reason lies in: in the existing mode of perforating on the tube wall, due to the elasticity of blood vessels, when the intubation operation is carried out, a patient may cause vasoconstriction or spasm due to pain, discomfort and the like, at the moment, the inner wall of the blood vessel inevitably clings to and presses the outer wall of the intubation tube, so that the perforating hole is possibly blocked, and the reverse blood perfusion cannot be realized; the technical scheme that this embodiment adopted, because guiding groove 30 is through the mode formation that caves in from the outer wall, even because vasoconstriction leads to the blood vessel inner wall to paste the intubate outer wall, still can form the route that supplies the blood circulation between this guiding groove 30 and the inner wall that pastes to guaranteed to carry out the smoothness of pouring to the opposite direction of inserting the direction.

Further, in some embodiments, the connection portion 20 is made of a material with good resilience, such as polyvinyl chloride, polyurethane or other materials with similar characteristics, so that the connection portion 20 can be elastically deformed, and the elastically deformable characteristic enables the included angle between the first tube 11 and the second tube 12 to be changed from the preset bending angle when the peripheral arterial cannula is inserted or withdrawn, so as to facilitate the operation and return to the preset bending angle through resilience after the first tube 11 enters the peripheral arterial blood vessel 40, so as to maintain the patency of the perfusion channel 16.

Further, as shown in fig. 1, in some embodiments, an elastic reinforcing wire 17 extending spirally is further provided between the inner wall and the outer wall of the peripheral arterial cannula, the material of the elastic reinforcing wire 17 may be medical stainless steel or titanium alloy, and by providing the elastic reinforcing wire 17, the peripheral arterial cannula can maintain good strength while having good elasticity, and avoid unsmooth blood flow due to excessive bending.

Further, the peripheral arterial cannula can be treated to have different hardness at different positions, for example, the hardness range of the first tube 11 is set to 75-85 shore hardness for the convenience of inserting the peripheral arterial cannula into a blood vessel; with the elastic reinforcing wire 17 between the inner and outer walls of the second tubular body 12, the hardness of the second tubular body 12 is set to 55-65 shore.

In some preferred embodiments, as shown in fig. 1, the elastic reinforcing wire 17 extends between the inner wall and the outer wall of the second tube 12. In other alternative embodiments, the extension length of the elastic reinforcement wire 17 may be further extended or shortened depending on the particular perfusion site.

Further, as shown in fig. 1, in some embodiments, the diameter of the perfusion channel 16 gradually increases from the second tube 12 to the third tube 13, and the perfusion channel 16 with a variable diameter can increase perfusion flow at the blood input end and increase perfusion pressure at the output end, thereby ensuring blood perfusion effect.

Fig. 5 illustrates a side cross-sectional view of a peripheral arterial cannula provided in accordance with some preferred embodiments of the present application, and fig. 6 is a schematic illustration of peripheral arterial perfusion using the peripheral arterial cannula.

The peripheral arterial cannula is a further modification of the peripheral arterial cannula shown in fig. 1, and as shown in fig. 5 and 6, the second opening 32 of the peripheral arterial cannula is closer to the second tube 12, i.e. it is located at the transition point between the connecting portion 20 and the second tube 12. Positioning the second opening 32 closer to the second tube 12 allows the second opening 32 to have a larger cross-section towards the S 'to further increase the perfusion flow in the direction of the S', and the location of this opening is substantially in the middle of the peripheral arterial vessel 40, further avoiding the possibility of the vessel wall blocking the passage of perfusion in the opposite direction to the direction of insertion.

Fig. 7 showsbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A ofbase:Sub>A peripheral arterial cannula according to some preferred embodiments of the present application, in which the guide slots 30 are multiple and circumferentially spaced along the outer wall of the first tube 11, as shown in fig. 7. The sectional area, depth and number of the guide groove 30 are adjusted, so that bidirectional perfusion flow can be adjusted and distributed, a bidirectional perfusion effect is achieved, the perfusion amount of the aorta can be guaranteed, sufficient blood supply of the lower limbs can be guaranteed, and ischemia or tissue necrosis of local tissues can be avoided.

Fig. 8 shows a side view of a peripheral arterial cannula according to some preferred embodiments of the present application, as shown in fig. 8, in which the structure of the guiding groove 30 is adjusted, in particular, in which the guiding groove 30 extends helically along the outer wall of the peripheral arterial cannula. Further, the guide groove 30 extending spirally may have a plurality of grooves.

Set up the guiding groove into the heliciform, under the condition that there is blood pressure differential in the S direction of peripheral arterial blood vessel 40 and S 'direction, can make the blood velocity of flow through the heliciform guiding groove accelerate, effectively reduce the ineffective flow and the blood destruction of blood, effectively reduce the whole perfusion pressure of intubate simultaneously to further promote the effect of carrying out blood perfusion to the S' direction.

Furthermore, the outer wall of the peripheral arterial cannula is also provided with identification scales. For example, in some preferred embodiments, a plurality of identification marks may be provided at equal intervals from the first tube 11 to the second tube 12 at 1cm intervals to facilitate viewing and determining the depth of the peripheral arterial cannula into the arterial vessel.

While the present invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof as defined in the appended claims.

Claims (9)

1. A peripheral arterial cannula, including first body, second body and the third body that connect gradually and form the perfusion passageway that link up, the distal end of first body has a first hole, the proximal end of third body has a second hole, first body is used for inserting peripheral arterial vessel and provides the blood perfusion towards the direction of inserting through first hole, its characterized in that:

the connecting part of the first pipe body and the second pipe body is provided with a preset bending angle;

on the outer wall of the peripheral arterial cannula there is a guide groove extending from the distal end of the first tube to the connection portion for providing a blood perfusion in the opposite direction of the insertion direction.

2. The peripheral arterial cannula according to claim 1, wherein:

the guide groove has a first opening facing an insertion direction at a distal end of the first tube; and

the guide groove has a second opening facing a direction opposite to the insertion direction at the connection portion.

3. The peripheral arterial cannula according to claim 2, wherein:

the second opening is located at the transition position of the connecting part and the second pipe body.

4. The peripheral arterial cannula according to claim 1, wherein:

the guiding groove has many, follows the outer wall circumference interval ground of first body sets up.

5. The peripheral arterial cannula according to claim 1, wherein:

the guide groove extends spirally along the outer wall of the peripheral arterial cannula.

6. The peripheral arterial cannula according to claim 1, wherein:

and an elastic reinforcing wire which extends spirally is arranged between the inner wall and the outer wall of the peripheral arterial cannula.

7. The peripheral arterial cannula according to claim 6, wherein:

the elastic reinforcing wire extends between the inner wall and the outer wall of the second pipe body.

8. The peripheral arterial cannula according to claim 1, wherein:

the connecting portion is elastically deformable.

9. The peripheral arterial cannula according to claim 1, wherein:

the pipe diameter of the filling channel gradually expands from the second pipe body to the third pipe body.

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