Vena cava cannula assembly

Abstract

The invention provides a vena cava cannula assembly, relates to the technical field of medical instruments, and is used for improving the safety of cardiac surgery. The vena cava cannula assembly comprises a vena cava body which is provided with an insertion end and an in-vitro end which are communicated with each other; the positioning ring is connected with the venous catheter body in a sliding manner; the umbrella-shaped clamping ring is slidably arranged on the venous catheter body in a sleeving mode and located on the side, close to the insertion end, of the positioning ring, a notch is formed in the side wall of the umbrella-shaped clamping ring, a clamping space is defined by the umbrella-shaped clamping ring, a clamping opening is formed in the side, facing the insertion end, of the clamping space, and the notch is communicated with the clamping space. Therefore, the positioning ring can be prevented from falling off, medical negligence can be avoided, and the safety of an operation can be improved. Meanwhile, the insertion position of the venous catheter body can be tightened through sliding of the umbrella-shaped clamping ring, so that the hemostatic effect of preventing bleeding caused by avulsion of the atrioventricular wall can be achieved, and the surgical efficiency can be improved.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a vena cava cannula assembly. Background Art

[0002] When performing a heart surgery, extracorporeal circulation generally needs to be established. Extracorporeal circulation requires arterial cannulation and venous cannulation to form the extracorporeal circulation. When cannulating the vena cava, purse-string sutures are sewn on the right auricle and the right atrial wall respectively, and a rubber tube hemostat is put on and pulled out for standby. Then an incision is made and the superior and inferior vena cava cannulas are inserted, and the rubber tube hemostat is tightened. The superior and inferior vena cava cannulas are fixed to prevent slippage, and the superior and inferior vena cava cannulas are connected to the cardiopulmonary bypass machine. During this process, due to the weakness of the atrial wall, atrial wall avulsion bleeding may occur when sewing the purse-string suture. In addition, generally, a rubber ring is routinely placed on the vena cava tube by a surgeon to locate the insertion length of the venous tube. Sometimes, it is necessary to adjust this rubber ring up and down. Sometimes, the rubber ring may accidentally be inserted into the heart. In this case, the rubber ring may fall into the heart, causing a medical accident. Summary of the Invention

[0003] In order to solve the above technical problems, this application provides a vena cava cannula assembly for improving the safety of heart surgery.

[0004] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0005] The embodiments of this application provide a vena cava cannula assembly, which includes: a venous tube body having a connected insertion end and an external end; a positioning ring slidably connected to the venous tube body; an umbrella-shaped snap ring slidably sleeved on the venous tube body and located on the side of the positioning ring close to the insertion end. A notch is provided on the side wall of the umbrella-shaped snap ring. The umbrella-shaped snap ring encloses a clamping space, and a clamping interface is provided on the side of the clamping space facing the insertion end. The notch communicates with the clamping space.

[0006] According to the vena cava cannula assembly of the embodiments of this application, by slidably connecting the positioning ring to the venous tube body, the position of the positioning ring can be adjusted as needed, and the positioning ring can be prevented from falling, thereby avoiding medical accidents and further being beneficial to improving the safety of the surgery. At the same time, by slidably sleeving the umbrella-shaped snap ring on the venous tube body, the insertion part of the venous tube body can be tightened by the sliding of the umbrella-shaped snap ring, thereby playing a hemostatic role and further being beneficial to improving the surgical efficiency.

[0007] In a possible implementation, a first chute is provided on the body of the venous tube, the first chute extends along the length direction of the body of the venous tube, a first slider is provided on the positioning ring, and the first slider is slidably arranged in the first chute.

[0008] In a possible implementation, one end of the first chute close to the insertion end is provided with a first stop block, one end of the first stop block is connected to the bottom wall of the first chute, and the other end extends along the radial direction of the body of the venous tube.

[0009] In a possible implementation, a plurality of first card slots are provided on the bottom wall of the first chute, a first elastic member is provided on the surface of the first slider facing the first chute, the first elastic member is connected to a first protrusion, and the first protrusion is in snap-fit connection with the first card slot.

[0010] In a possible implementation, the vena cava cannula assembly further includes a first bladder and a first connecting tube, the first bladder is arranged at one end of the first chute close to the insertion end, the first connecting tube is connected to one end of the first bladder close to the insertion end, and is used for conveying gas or liquid into the first bladder, and the first bladder is used for driving the first slider to slide in a direction close to or away from the insertion end.

[0011] In a possible implementation, the positioning ring is detachably connected to the body of the venous tube.

[0012] In a possible implementation, the first slider includes a first connecting plate, a first vertical plate, a second vertical plate, a first abutting plate and a second abutting plate, the first vertical plate and the second vertical plate are arranged on opposite sides of the first connecting plate, one end of the first abutting plate is connected to the end of the first vertical plate far from the first connecting plate, and the other end extends away from the first vertical plate for abutting against the inner wall of the first chute, one end of the second abutting plate is connected to the end of the second vertical plate far from the first connecting plate, and the other end extends away from the second vertical plate for abutting against the inner wall of the first chute.

[0013] In a possible implementation, the vena cava cannula assembly further includes a driving member and a clamping member, a plurality of the clamping members are provided on the inner wall of the umbrella-shaped snap ring, the plurality of clamping members are arranged at intervals along the circumferential direction of the body of the venous tube, the driving member is connected to the clamping member and is used for driving the clamping member to move in a direction close to or away from the body of the venous tube.

[0014] In a possible implementation, the vena cava cannula assembly further includes a telescopic member, and the umbrella-shaped snap ring is connected to the positioning ring through the telescopic member.

[0015] In a possible implementation manner, the umbrella-shaped snap ring is detachably connected to the venous tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application and, together with the specification, are used to explain the principles of the present application.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the related art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A perspective view of a vena cava cannula assembly provided in some embodiments of the present application;

[0019] Figure 2 A schematic diagram of a vena cava cannula assembly provided in some embodiments of the present application;

[0020] Figure 3 A schematic diagram of the cooperation between a first slider and a first chute provided in some embodiments of the present application.

[0021] Reference numerals:

[0022] 100, vena cava cannula assembly;

[0023] 1, venous tube body; 11, insertion end; 12, external end; 13, first chute;

[0024] 2, positioning ring; 21, first slider; 211, first connecting plate; 212, first vertical plate; 213, second vertical plate; 214, first abutting plate; 215, second abutting plate; 22, first stop block; 3, umbrella-shaped snap ring; 31, clamping space; 32, notch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to more clearly understand the above objects, features and advantages of the present application, the following will further describe the solutions of the present application. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0027] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, "connected" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that they are connected to each other and the relative positional relationship after connection remains unchanged. In addition, the orientation terms mentioned in the embodiments of the present application, such as "inner", "outer", etc., are only with reference to the direction of the drawings. Therefore, the orientation terms used are for better and clearer description and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the embodiments of the present application.

[0028] In the description of the embodiments of the present application, the term "comprising", "including" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element.

[0029] For heart surgery, extracorporeal circulation is generally established. Extracorporeal circulation requires arterial cannulation and venous cannulation to form extracorporeal circulation. When cannulating the vena cava, purse-string sutures are sewn on the right auricle and the right atrial wall respectively, and a rubber tube hemostat is put on and pulled out for standby. Then an incision is made and the superior and inferior vena cava cannulas are inserted. Around the cannulas, the rubber tube hemostat is tightened to fix the superior and inferior vena cava cannulas to prevent slippage, and the superior and inferior vena cava cannulas are connected to the cardiopulmonary bypass machine. During this process, due to the thin atrial wall, atrial wall avulsion bleeding may occur when sewing the purse-string suture. In addition, generally, a rubber ring is routinely placed on the vena cava tube by the surgeon to locate the insertion length of the venous tube. Sometimes, the rubber ring needs to be adjusted up and down. Sometimes, the rubber ring may accidentally be inserted into the heart. In this case, the rubber ring may fall into the heart, causing a medical accident.

[0030] To solve the above technical problems, the present application provides a vena cava cannulation assembly.

[0031] Please refer to Figure 1 and Figure 2 , Figure 1 which is a perspective view of the vena cava cannulation assembly provided by some embodiments of the present application, Figure 2 and which is a schematic view of the vena cava cannulation assembly provided by some embodiments of the present application. The vena cava cannulation assembly 100 may include a venous tube body 1, a positioning ring 2, and an umbrella-shaped snap ring 3.

[0032] The venous tube body 1 may have an insertion end 11 and an extracorporeal end 12 that are connected and communicate, so that liquid can flow from the insertion end 11 to the extracorporeal end 12, or can flow from the extracorporeal end 12 to the insertion end 11.

[0033] The positioning ring 2 is slidably connected to the venous tube body 1, so that the positioning ring 2 can slide along the extension direction of the venous tube body 1, and can move from the extracorporeal end 12 of the venous tube body 1 to the insertion end 11, so that the position of the positioning ring 2 can be adjusted as needed. And since the positioning ring 2 is connected to the venous tube body 1, the positioning ring 2 can be prevented from falling, thus avoiding causing a medical accident.

[0034] The umbrella-shaped snap ring 3 is slidably sleeved on the venous tube body 1 and is located on the side of the positioning ring 2 close to the insertion end 11. The umbrella-shaped snap ring 3 encloses a clamping space 31, and the side of the clamping space 31 facing the insertion end 11 has a clamping interface. Specifically, the umbrella-shaped snap ring 3 can slide on the venous tube body 1, and the umbrella-shaped snap ring 3 is formed in an umbrella shape. The clamping space 31 of the umbrella-shaped snap ring 3 can cover and collect the incision of the venous tube body 1 inserted into the heart through the clamping interface, so as to play a hemostatic role.

[0035] A notch 32 is provided on the side wall of the umbrella-shaped snap ring 3, and the notch 32 communicates with the clamping space 31. Thus, through the notch 32, the rubber tube on the tightened purse-string suture can be avoided.

[0036] For the vena cava cannula assembly 100 according to an embodiment of the present application, by slidably connecting the positioning ring 2 to the venous tube body 1, the position of the positioning ring 2 can be adjusted as needed, and the positioning ring 2 can be prevented from falling off, thereby avoiding medical accidents and further facilitating the improvement of the safety of the operation. At the same time, by slidably sleeving the umbrella-shaped snap ring 3 on the venous tube body 1, the insertion part of the venous tube body 1 can be tightened by the sliding of the umbrella-shaped snap ring 3, thereby playing a hemostatic role and further facilitating the improvement of the operation efficiency.

[0037] Please refer to Figures 1 - 3 , Figure 3 which is a schematic diagram of the cooperation between the first slider and the first chute provided in some embodiments of the present application. In some embodiments, a first chute 13 may be provided on the venous tube body 1. The first chute 13 extends along the length direction of the venous tube body 1, and a first slider 21 is provided on the positioning ring 2. The first slider 21 is slidably disposed in the first chute 13. Specifically, the first slider 21 is slidably disposed in the first chute 13 and can slide along the first chute 13, thereby driving the positioning ring 2 to move. Thus, through the cooperation between the first chute 13 and the first slider 21, the positioning ring 2 can slide relative to the venous tube body 1, with a simple structure and convenient operation, which is beneficial to improving the operation efficiency.

[0038] Please refer to Figures 1 - 3 , in some embodiments, a first stop block 22 may be provided at one end of the first chute 13 close to the insertion end 11. One end of the first stop block 22 is connected to the bottom wall of the first chute 13, and the other end extends in the radial direction of the venous tube body 1. By providing the first stop block 22, the positioning ring 2 can be prevented from falling out of the first chute 13, thereby better avoiding medical risks.

[0039] Please refer to Figures 1 - 3 , in some embodiments, a plurality of first card slots are provided on the bottom wall of the first chute 13. A first elastic member is provided on the surface of the first slider 21 facing the first chute 13. The first elastic member is connected to a first protrusion, and the first protrusion is in snap-fit connection with the first card slot. Specifically, the plurality of first card slots may be arranged at intervals along the extension direction of the first chute 13. When the first protrusion moves to the position of the first card slot, the first elastic member drives the first protrusion to move towards the first card slot, so that the first protrusion can move into the first card slot, thereby realizing the limitation of the position of the positioning ring 2. Such a setting has a simple structure, which is beneficial to reducing the operation difficulty and further beneficial to improving the operation efficiency.

[0040] Please refer to Figures 1 - 3, in some embodiments, the vena cava cannula assembly 100 may further include a first bladder and a first connecting tube. The first bladder is disposed at one end of the first chute 13 close to the insertion end 11. The first connecting tube is connected to one end of the first bladder close to the insertion end 11 and is used to convey gas or liquid into the first bladder. The first bladder is used to drive the first slider 21 to slide in a direction close to or away from the insertion end 11. Thus, the first bladder can be inflated through the first connecting tube. After the first bladder is inflated or filled with liquid, it can abut against the first slider 21. As the filling amount increases, the volume of the first bladder increases, and the first bladder can expand in volume along the extending direction of the first chute 13, thereby pushing the first slider 21 to move. The driving method is simple, which is beneficial to reducing the manufacturing cost of the vena cava cannula assembly 100.

[0041] Please refer to Figures 1 - 3 , in some embodiments, the positioning ring 2 and the umbrella-shaped snap ring 3 are detachably connected to the venous tube body 1. Thus, when the sizes of the positioning ring 2 and the umbrella-shaped snap ring 3 are inappropriate, they can be replaced. Different sizes of the positioning ring 2 and the umbrella-shaped snap ring 3 can be replaced according to needs, which is beneficial to making the use of the vena cava cannula assembly 100 more convenient.

[0042] Please continue to refer to Figures 1 - 3 , in some embodiments, the first slider 21 may include a first connecting plate 211, a first vertical plate 212, a second vertical plate 213, a first abutting plate 214, and a second abutting plate 215. The first vertical plate 212 and the second vertical plate 213 are disposed on opposite sides of the first connecting plate 211. One end of the first abutting plate 214 is connected to the end of the first vertical plate 212 away from the first connecting plate 211, and the other end extends away from the first vertical plate 212 for abutting against the inner wall of the first chute 13. One end of the second abutting plate 215 is connected to the end of the second vertical plate 213 away from the first connecting plate 211, and the other end extends away from the second vertical plate 213 for abutting against the inner wall of the first chute 13. Among them, the first connecting plate 211 may have elasticity, so that the first slider 21 can be removed from the first chute 13 by squeezing the first vertical plate 212 and the second vertical plate 213. Such a setting has a simple structure and is beneficial to reducing the manufacturing cost of the vena cava cannula assembly 100.

[0043] Please continue to refer to Figures 1 - 3 , in some embodiments, the vena cava cannula assembly 100 further includes a driving member and a clamping member. A plurality of clamping members are provided on the inner wall of the umbrella-shaped snap ring 3. The plurality of clamping members are arranged at intervals along the circumferential direction of the venous tube body 1. The driving member is connected to the clamping member and is used to drive the clamping member to move in a direction close to or away from the venous tube body 1. Thus, through the cooperation between the driving member and the clamping member, the fixation of the umbrella-shaped snap ring 3 can be realized. The structure is simple and the operation is convenient, which is beneficial to reducing the manufacturing cost of the vena cava cannula assembly 100.

[0044] Please refer to Figures 1 - 3 Figures 1 - 3 , in some embodiments, the vena cava cannula assembly 100 may further include a telescopic member. The umbrella-shaped snap ring 3 is connected to the positioning ring 2 through the telescopic member. Thus, the umbrella-shaped snap ring 3 can move together with the positioning ring 2, and the position of the umbrella-shaped snap ring 3 can be changed through the telescopic member, and the control method is simple.

[0045] Please refer to Figures 1 - 3 Figures 1 - 3 , in some embodiments, the umbrella-shaped snap ring 3 is detachably connected to the venous tube body 1. Thus, different-sized umbrella-shaped snap rings 3 can be replaced as needed, which is beneficial to improving the versatility of the vena cava cannula assembly 100.

[0046] Exemplarily, the positioning ring 2 can be embedded in the umbrella-shaped snap ring 3, so that the installation difficulty can be reduced during installation, and it is also convenient for doctors to use. Specifically, an embedding groove can be provided in the umbrella-shaped snap ring 3, and the positioning ring 2 can be snapped into the embedding groove.

[0047] In the description of this specification, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0048] As described above, only the specific embodiments of the present invention are given, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A vena cava cannula assembly, characterized in that: The vena cava cannula assembly comprises: A venous tube body, the venous tube body having an insertion end and an external end connected to each other; a positioning ring slidably connected to the intravenous tube body; An umbrella-shaped clamping ring is slidably mounted on the venous tube body and is located on the side of the positioning ring close to the insertion end. A notch is provided on the side wall of the umbrella-shaped clamping ring. The umbrella-shaped clamping ring encloses a clamping space. The clamping space has a clamping interface on the side facing the insertion end, and the notch is connected to the clamping space.

2. The vena cava cannula assembly according to claim 1, characterized in that: The intravenous tube body is provided with a first slide groove, and the first slide groove extends along the length direction of the intravenous tube body. The positioning ring is provided with a first slider, and the first slider is slidably disposed in the first slide groove.

3. The vena cava cannula assembly according to claim 2, characterized in that: A first stopper is provided at one end of the first chute close to the insertion end, one end of the first stopper is connected to the bottom wall of the first chute, and the other end of the first stopper extends along the radial direction of the venous tube body.

4. The vena cava cannula assembly according to claim 2, characterized in that: A plurality of first slots are provided on the bottom wall of the first slide groove, a first elastic member is provided on the surface of the first sliding block facing the first slide groove, the first elastic member is connected to the first protrusion, and the first protrusion is engaged with the first slot.

5. The vena cava cannula assembly according to claim 4, characterized in that: The vena cava catheter assembly also includes a first balloon and a first connecting tube. The first balloon is arranged at one end of the first slide groove close to the insertion end. The first connecting tube is connected to one end of the first balloon close to the insertion end and is used to transport gas or liquid into the first balloon. The first balloon is used to drive the first slider to slide in a direction close to or away from the insertion end.

6. The vena cava cannula assembly according to claim 2, characterized in that: The positioning ring is detachably connected to the intravenous tube body.

7. The vena cava cannula assembly according to claim 6, characterized in that: The first sliding block includes a first connecting plate, a first vertical plate, a second vertical plate, a first abutting plate and a second abutting plate, the first vertical plate and the second vertical plate are arranged on opposite sides of the first connecting plate, one end of the first abutting plate is connected to an end of the first vertical plate away from the first connecting plate, and the other end extends in a direction away from the first vertical plate for abutting against an inner wall of the first sliding groove, one end of the second abutting plate is connected to an end of the second vertical plate away from the first connecting plate, and the other end extends in a direction away from the second vertical plate for abutting against the inner wall of the first sliding groove.

8. The vena cava cannula assembly according to claim 1, characterized in that: The vena cava cannula assembly also includes a driving member and a clamping member. A plurality of the clamping members are provided on the inner wall of the umbrella-shaped clamping ring. The plurality of the clamping members are arranged at intervals along the circumference of the venous tube body. The driving member is connected to the clamping member and is used to drive the clamping member to move toward or away from the venous tube body.

9. The vena cava cannula assembly according to claim 1, characterized in that: The vena cava cannula assembly also includes a telescopic member, and the umbrella-shaped clamping ring is connected to the positioning ring via the telescopic member.

10. The vena cava cannula assembly according to claim 1, characterized in that: The umbrella-shaped clamp is detachably connected to the intravenous tube body.

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