Vena cava cannulation assembly

Abstract

The application provides a vena cava cannula assembly, relates to the technical field of medical devices, and is used for improving the safety of heart surgery. The vena cava cannula assembly comprises a vein pipe body, the vein pipe body has an insertion end and an extracorporeal end in communication, a positioning ring is slidably connected with the vein pipe body, and an umbrella-shaped clamping ring is slidably sleeved on the vein pipe body and located on one side of the positioning ring close to the insertion end. An opening is arranged on the side wall of the umbrella-shaped clamping ring, the umbrella-shaped clamping ring surrounds a clamping space, one side of the clamping space towards the insertion end is provided with a clamping port, and the opening is in communication with the clamping space. Thus, the positioning ring can be prevented from falling off, so that a medical accident can be avoided, and the safety of surgery is improved. Meanwhile, the insertion part of the vein pipe body can be tightened through the sliding of the umbrella-shaped clamping ring, so that a hemostatic effect of preventing blood from flowing out due to a heart wall tear can be achieved, and the surgery efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a vena cava cannulation assembly. Background Technology

[0002] Cardiac surgery typically requires establishing cardiopulmonary bypass. Cardiopulmonary bypass requires arterial and venous cannulation. When the vena cava is cannulated, a purse-string suture is placed in the right atrial appendage and right atrial wall, fitted with a rubber tourniquet, and pulled out for later use. Then, an incision is made, and the superior and inferior vena cava cannulas are inserted, with the tourniquet tightened. The cannulas are secured to prevent slippage and connected to the cardiopulmonary bypass machine. During this process, due to the thinness of the atrial wall, there is a possibility of atrial wall tearing and bleeding when suturing the purse-string suture. Additionally, surgeons routinely place a rubber ring on the vena cava cannula to determine the insertion length. Sometimes this ring needs to be adjusted, and occasionally, it may be accidentally inserted into the heart. In such cases, the ring may dislodge and become lodged inside the heart, causing a medical accident. Summary of the Invention

[0003] To address the aforementioned technical problems, this application provides a vena cava cannulation assembly to improve the safety of cardiac surgery.

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

[0005] This application provides a vena cava cannulation assembly, comprising: a vena cava body having an insertion end and an external end connected in communication; a positioning ring slidably connected to the vena cava body; and an umbrella-shaped retaining ring slidably sleeved on the vena cava body and located on the side of the positioning ring near the insertion end. The umbrella-shaped retaining ring has a notch on its side wall, forming a retaining space. The retaining space has a retaining interface on the side facing the insertion end, and the notch communicates with the retaining space.

[0006] According to the vena cava cannulation assembly of this application, by slidably connecting the positioning ring to the vein tube body, the position of the positioning ring can be adjusted as needed, and the positioning ring can be prevented from falling off, thereby avoiding medical accidents and improving surgical safety. Simultaneously, by slidably fitting an umbrella-shaped retaining ring onto the vein tube body, the insertion point of the vein tube body can be tightened through the sliding of the umbrella-shaped retaining ring, thereby achieving hemostasis and improving surgical efficiency.

[0007] In one possible implementation, the vein tube body is provided with a first groove extending along the length of the vein tube body, and the positioning ring is provided with a first slider slidably disposed within the first groove.

[0008] In one possible implementation, a first stop is provided at one end of the first groove near the insertion end, one end of the first stop is connected to the bottom wall of the first groove, and the other end extends in the radial direction of the vein body.

[0009] In one possible implementation, the bottom wall of the first slide groove is provided with a plurality of first slots, and the surface of the first slider facing the first slide groove is provided with a first elastic element, the first elastic element being connected to a first protrusion, and the first protrusion engaging with the first slot.

[0010] In one possible implementation, the vena cava cannulation assembly further includes a first bladder and a first connecting tube, the first bladder being disposed at one end of the first groove near the insertion end, the first connecting tube being connected to the end of the first bladder near the insertion end and for delivering gas or liquid into the first bladder, the first bladder being used to drive the first slider to slide toward or away from the insertion end.

[0011] In one possible implementation, the positioning ring is detachably connected to the vein tube body.

[0012] In one 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 disposed 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 away from the first connecting plate, and the other end extends in a direction away from the first vertical plate for abutting against the inner wall of the first groove. One end of the second abutting plate is connected to the 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 groove.

[0013] In one possible implementation, the vena cava cannulation assembly further includes a drive and clamping members. A plurality of clamping members are provided on the inner wall of the umbrella-shaped clasp, and the plurality of clamping members are spaced apart circumferentially along the vein body. The drive is connected to the clamping members and is used to drive the clamping members to move toward or away from the vein body.

[0014] In one possible implementation, the vena cava cannulation assembly further includes a telescopic element, through which the umbrella-shaped clasp is connected to the positioning ring.

[0015] In one possible implementation, the umbrella-shaped retaining ring is detachably connected to the vein body. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0018] Figure 1 A perspective view of a vena cava cannulation assembly provided in some embodiments of this application;

[0019] Figure 2 A schematic diagram of a vena cava cannulation assembly provided for some embodiments of this application;

[0020] Figure 3 This is a schematic diagram showing the first slider and the first groove cooperating in some embodiments of this application.

[0021] Figure label:

[0022] 100. Catheterization assembly;

[0023] 1. Vein tube body; 11. Insertion end; 12. External end; 13. First groove;

[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 retaining ring; 31. Clamping space; 32. Notch. Detailed Implementation

[0025] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0026] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, "linking" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after the connection. Furthermore, the directional terms mentioned in the embodiments of this application, such as "inner" and "outer," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0028] In the description of embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements possessed by such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0029] Cardiac surgery typically requires establishing cardiopulmonary bypass. Cardiopulmonary bypass requires arterial and venous cannulation. When the vena cava is cannulated, a purse-string suture is placed in the right atrial appendage and right atrial wall, fitted with a rubber tourniquet, and pulled out for later use. An incision is then made, and the superior and inferior vena cava cannulas are inserted. The rubber tourniquet is tightened around the cannulas to prevent slippage, and the cannulas are then connected to a heart-lung machine. During this process, due to the thinness of the atrial wall, there is a possibility of atrial wall tearing and bleeding when suturing the purse-string suture. Additionally, surgeons routinely place a rubber ring on the vena cava cannula to determine the insertion length. Sometimes this rubber ring needs to be adjusted, and sometimes it may be accidentally inserted into the heart. In such cases, the rubber ring may dislodge and become lodged inside the heart, causing a medical accident.

[0030] To address the aforementioned technical problems, this application provides a vena cava cannulation assembly.

[0031] Please see Figure 1 and Figure 2 , Figure 1 A perspective view of a vena cava cannulation assembly provided in some embodiments of this application. Figure 2 This is a schematic diagram of a vena cava cannulation assembly provided in some embodiments of this application. The vena cava cannulation assembly 100 may include a vena cava body 1, a positioning ring 2, and an umbrella-shaped retaining ring 3.

[0032] The vein tube body 1 may have an insertion end 11 and an external end 12 that are connected, so that fluid can flow from the insertion end 11 to the external end 12, or from the external end 12 to the insertion end 11.

[0033] The positioning ring 2 is slidably connected to the vein tube body 1, allowing it to slide along the extension direction of the vein tube body 1. It can move from the external end 12 to the insertion end 11, thus adjusting the position of the positioning ring 2 as needed. Furthermore, because the positioning ring 2 is connected to the vein tube body 1, it prevents the ring from falling off, thereby avoiding medical accidents.

[0034] The umbrella-shaped retaining ring 3 is slidably fitted onto the vein tube body 1 and is located on the side of the positioning ring 2 near the insertion end 11. The umbrella-shaped retaining ring 3 encloses a retaining space 31, and the retaining space 31 has a retaining interface on the side facing the insertion end 11. Specifically, the umbrella-shaped retaining ring 3 can slide on the vein tube body 1, and the umbrella-shaped retaining ring 3 is formed in an umbrella shape. The retaining space 31 of the umbrella-shaped retaining ring 3 can cover and collect the vein tube body 1 through the retaining interface, thereby achieving hemostasis.

[0035] The umbrella-shaped retaining ring 3 has a notch 32 on its side wall, which communicates with the clamping space 31. Thus, the rubber tube accommodating the tightening purse thread can be avoided through the notch 32.

[0036] According to the embodiments of this application, the vena cava cannulation assembly 100 allows the positioning ring 2 to be slidably connected to the vein tube body 1, enabling adjustment of the position of the positioning ring 2 as needed and preventing it from falling off, thereby avoiding medical accidents and improving surgical safety. Simultaneously, by slidably fitting the umbrella-shaped retaining ring 3 onto the vein tube body 1, the insertion point of the vein tube body 1 can be tightened through the sliding of the umbrella-shaped retaining ring 3, achieving hemostasis and improving surgical efficiency.

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

[0038] Please see Figures 1-3 In some embodiments, a first stop 22 may be provided at one end of the first groove 13 near the insertion end 11. One end of the first stop 22 is connected to the bottom wall of the first groove 13, and the other end extends radially along the vein body 1. By providing the first stop 22, the positioning ring 2 can be prevented from falling out of the first groove 13, thereby better avoiding potential medical risks.

[0039] Please see Figures 1-3 In some embodiments, the bottom wall of the first slide groove 13 is provided with a plurality of first slots. The surface of the first slider 21 facing the first slide groove 13 is provided with a first elastic element, which is connected to a first protrusion, and the first protrusion engages with the first slot. Specifically, the plurality of first slots can be spaced apart along the extending direction of the first slide groove 13. When the first protrusion moves to the first slot, the first elastic element drives the first protrusion to move closer to the first slot, allowing the first protrusion to move into the first slot, thereby limiting the position of the positioning ring 2. This structural arrangement is simple, thus reducing operational difficulty and improving surgical efficiency.

[0040] Please see Figures 1-3In some embodiments, the vena cava cannulation assembly 100 may further include a first bladder and a first connecting tube. The first bladder is disposed at one end of the first groove 13 near the insertion end 11, and the first connecting tube is connected to the end of the first bladder near the insertion end 11 and is used to deliver gas or liquid into the first bladder. The first bladder is used to drive the first slider 21 to slide towards or away from the insertion end 11. Thus, the first bladder can be inflated through the first connecting tube, and after being inflated or filled with liquid, it can abut against the first slider 21. As the amount of inflated liquid increases, the volume of the first bladder increases, and the first bladder can expand its volume along the extension direction of the first groove 13, thereby pushing the first slider 21 to move. The driving method is simple and helps to reduce the manufacturing cost of the vena cava cannulation assembly 100.

[0041] Please see Figures 1-3 In some embodiments, the positioning ring 2 and the umbrella-shaped retaining ring 3 are detachably connected to the vein tube body 1. Therefore, when the size of the positioning ring 2 and the umbrella-shaped retaining ring 3 is unsuitable, they can be replaced, and different sizes of positioning ring 2 and umbrella-shaped retaining ring 3 can be used as needed, thereby making the use of the vena cava cannulation assembly 100 more convenient.

[0042] Please continue reading. 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 to abut against the inner wall of the first slide groove 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 to abut against the inner wall of the first slide groove 13. The first connecting plate 211 may be elastic, allowing the first slider 21 to be removed from the first slide groove 13 by squeezing the first vertical plate 212 and the second vertical plate 213. This configuration is simple and helps reduce the manufacturing cost of the vena cava cannulation assembly 100.

[0043] Please continue reading. Figures 1-3 In some embodiments, the vena cava cannulation assembly 100 further includes a drive member and clamping members. Multiple clamping members are provided on the inner wall of the umbrella-shaped clasp 3, spaced apart circumferentially along the vein body 1. The drive member is connected to the clamping members and is used to drive the clamping members to move closer to or further away from the vein body 1. Thus, the umbrella-shaped clasp 3 can be fixed through the cooperation between the drive member and the clamping members. This design is simple and easy to operate, thereby helping to reduce the manufacturing cost of the vena cava cannulation assembly 100.

[0044] Please see Figures 1-3 In some embodiments, the vena cava cannulation assembly 100 may further include a telescopic member. The umbrella-shaped retaining ring 3 is connected to the positioning ring 2 via the telescopic member. Thus, the umbrella-shaped retaining ring 3 can move together with the positioning ring 2, and its position can be changed by the telescopic member, simplifying the control method.

[0045] Please see Figures 1-3 In some embodiments, the umbrella-shaped clasp 3 is detachably connected to the vein tube body 1. This allows for the replacement of umbrella-shaped clasps 3 of different sizes as needed, thereby improving the versatility of the vena cava cannulation assembly 100.

[0046] For example, the positioning ring 2 can be embedded in the umbrella-shaped retaining ring 3, which reduces the difficulty of installation and makes it easier for doctors to use. Specifically, the umbrella-shaped retaining ring 3 can be provided with an embedding groove, into which the positioning ring 2 can be inserted.

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

[0048] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A vena cava cannulation assembly, characterized in that, The vena cava cannulation assembly includes: A venous catheter body having a communicating insertion end and an external end; A positioning ring, which is slidably connected to the vein tube body; An umbrella-shaped retaining ring is slidably fitted onto the vein tube body and located on the side of the positioning ring near the insertion end. The side wall of the umbrella-shaped retaining ring has a notch, and the umbrella-shaped retaining ring encloses a clamping space. The side of the clamping space facing the insertion end has a clamping interface, and the notch communicates with the clamping space. The vein tube body is provided with a first groove, which extends along the length of the vein tube body. The positioning ring is provided with a first slider, which is slidably disposed in the first groove. The positioning ring is detachably connected to the vein tube body; 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 disposed 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 away from the first connecting plate, and the other end extends in a direction away from the first vertical plate for abutting against the inner wall of the first groove. One end of the second abutting plate is connected to the 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 groove. The first connecting plate is an elastic element.

2. The vena cava cannulation assembly according to claim 1, characterized in that, A first stop is provided at one end of the first groove near the insertion end. One end of the first stop is connected to the bottom wall of the first groove, and the other end extends along the radial direction of the vein body.

3. The vena cava cannulation assembly according to claim 1, characterized in that, The bottom wall of the first slide groove is provided with a plurality of first slots, and the surface of the first slider facing the first slide groove is provided with a first elastic element. The first elastic element is connected to a first protrusion, and the first protrusion engages with the first slot.

4. The vena cava cannulation assembly according to claim 3, characterized in that, The vena cava cannulation assembly further includes a first bladder and a first connecting tube. The first bladder is disposed at one end of the first groove near the insertion end. The first connecting tube is connected to the end of the first bladder near the insertion end and is used to deliver gas or liquid into the first bladder. The first bladder is used to drive the first slider to slide towards or away from the insertion end.

5. The vena cava cannulation assembly according to claim 1, characterized in that, The vena cava cannulation assembly further includes a drive member and a clamping member. The inner wall of the umbrella-shaped clasp is provided with a plurality of clamping members, which are spaced apart circumferentially along the vein body. The drive member is connected to the clamping members and is used to drive the clamping members to move toward or away from the vein body.

6. The vena cava cannulation assembly according to claim 1, characterized in that, The vena cava cannulation assembly also includes a telescopic component, and the umbrella-shaped clasp is connected to the positioning ring via the telescopic component.

7. The vena cava cannulation assembly according to claim 1, characterized in that, The umbrella-shaped retaining ring is detachably connected to the vein tube body.

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