A through-the-wall puncture trocar device

Abstract

This utility model relates to the field of medical device technology, specifically to a transvascular puncture cannula device. The utility model includes a puncture cannula comprising a cannula and a puncture needle, with the cannula fitted over the puncture needle. The cannula head is arc-shaped to conform to the direction of the blood vessel to reduce damage; the puncture needle tip is extended by 10mm to increase the controllability of needle insertion, preventing premature withdrawal of the needle from the blood vessel when continuing insertion after blood has flowed out, thus improving the success rate of puncture. The cannula and puncture needle are movable, with a movement distance of 0-10mm between the end of the cannula and the end of the puncture needle. After successful puncture, the position can be adjusted to allow the puncture needle to remain in the blood vessel while the cannula is slowly withdrawn, preventing the cannula from detaching from the blood vessel, eliminating the need for re-puncture, simplifying the operation, reducing the risk of blood vessel rupture, bleeding, and occlusion, and reducing patient discomfort.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a transmural puncture cannula device. Background Technology

[0002] In the medical field, transmural puncture procedures (such as vascular puncture) are common in clinical diagnosis and treatment, and are widely used in scenarios such as intravenous infusion, blood collection, and interventional therapy. However, traditional transmural puncture cannula devices have many drawbacks, affecting puncture effectiveness and patient experience.

[0003] Traditional trocar cannulas typically have a straight tip, which can easily create a significant angle between the cannula and the blood vessel during puncture. This can lead to scraping and damage to the vessel wall, increasing the risk of rupture, bleeding, and complications such as vascular occlusion, affecting subsequent treatment and patient recovery. Furthermore, the length of traditional trocars is often poorly designed. During puncture, once blood flow indicates successful puncture, the needle may prematurely withdraw from the vessel when further insertion is attempted. This makes it difficult for the operator to accurately control the insertion depth, increasing the probability of puncture failure and often requiring multiple punctures. This not only increases patient discomfort but also further increases the degree of vascular damage and the likelihood of adverse events such as vascular occlusion.

[0004] Furthermore, with traditional transluminal cannula devices, the relative positions of the cannula tip and the puncture needle tip are fixed or have limited mobility. After successful puncture, procedures such as removing the puncture needle and withdrawing the cannula can easily lead to excessive cannula withdrawal, causing the cannula to detach from the blood vessel and requiring re-puncture. This prolongs the procedure time, increases patient discomfort, and may further damage the blood vessel. These problems severely affect the stability and success rate of puncture procedures, increasing patient suffering and medical risks. Therefore, there is an urgent need for an improved transluminal cannula device to address these clinical pain points. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned problems and provide a transmural puncture cannula device. To achieve the above objective, this invention adopts the following technical solution:

[0006] A transmural puncture cannula device includes a puncture cannula, which comprises a cannula and a puncture needle. The cannula is fitted in front of the puncture needle, the head of the cannula is arc-shaped, the tip of the puncture needle is extended, and the cannula and the puncture needle are movable between each other.

[0007] As an improvement, the tip of the puncture needle is extended by 10 mm.

[0008] As an improvement, the movement distance between the end of the cannula and the end of the puncture needle is 0-10mm.

[0009] The advantages of this utility model are:

[0010] 1. The curved design of the cannula head of this utility model conforms to the direction of the blood vessel, reducing vascular damage during puncture and making the puncture process smoother; the puncture needle is extended by 10mm, increasing the controllability of the needle insertion operation. When continuing to insert the needle after blood has flowed out, it is less likely to withdraw from the blood vessel prematurely, improving the accuracy of puncture success judgment and the stability of operation, thereby increasing the puncture success rate and reducing the pain caused to patients by multiple punctures.

[0011] 2. The arc-shaped cannula head of this utility model avoids the angle damage between the traditional straight head and the blood vessel, reducing the risk of blood vessel rupture and bleeding; the stable operation during puncture reduces the damage to the blood vessel caused by multiple punctures, and when the cannula is left in the blood vessel, the arc-shaped head adapts to the blood vessel, further reducing the adverse effects on the blood vessel and reducing the probability of complications such as blood vessel occlusion.

[0012] 3. The design of the cannula and puncture needle of this utility model allows for movement of 0-10mm. After successful puncture, the position of the two can be adjusted to allow the puncture needle to remain in the blood vessel and the cannula to be slowly withdrawn. This avoids excessive withdrawal of the cannula from the blood vessel, eliminating the need for re-puncture, simplifying the operation process, improving the convenience and efficiency of operation, and reducing the difficulty of operation for operators. Attached Figure Description

[0013] Figure 1 The structure of a transmural puncture cannula device in Example 1. Figure 1 .

[0014] Figure 2 The structure of a transmural puncture cannula device in Example 1. Figure 2 .

[0015] Figure 3 The structure of a transmural puncture cannula device in Example 1. Figure 3 .

[0016] Figure 4 The structure of a transmural puncture cannula device in Example 1. Figure 4 .

[0017] Figure 5 The structure of the prior art in Example 1 Figure 1 .

[0018] Figure 6 The structure of the prior art in Example 1 Figure 2 .

[0019] Figure 7 The structure of the prior art in Example 1 Figure 3 .

[0020] Figure 8The structure of the prior art in Example 1 Figure 4 .

[0021] The diagram is labeled as follows:

[0022] 1. Cannula; 2. Puncture needle. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] In the description of the embodiments of this utility model, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the embodiments of this utility model, "a plurality of" means at least two.

[0027] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The present invention will be described in detail below through specific embodiments to enable a better understanding of the present invention. However, the following embodiments do not limit the scope of protection of the present invention.

[0029] Example 1

[0030] This embodiment discloses a transmural puncture cannula device.

[0031] like Figures 1 to 8 As shown, this embodiment includes a puncture cannula. By improving the structure of the cannula 1 and the puncture needle 2 and their cooperation, a better puncture effect is achieved.

[0032] Cannula 1 Structure: The puncture cannula includes a cannula 1 and a puncture needle 2. The cannula 1 is fitted in front of the puncture needle 2, and the head of the cannula 1 is arc-shaped. The arc-shaped head design changes the contact angle between the traditional straight head and the blood vessel, allowing the head of the cannula 1 to fit more closely with the direction of the blood vessel during puncture, reducing the risk of scratching and damage to the blood vessel wall and protecting the integrity of the blood vessel.

[0033] The structure of the puncture needle 2: The needle tip of the puncture needle 2 is extended, specifically by 10mm. With this extension, during the puncture procedure, once blood flow indicates that a blood vessel has been punctured, there is more operating space for further needle insertion. This allows the operator to accurately control the insertion depth, reducing puncture failures caused by premature withdrawal of the puncture needle 2 from the blood vessel and improving the success rate of punctures.

[0034] The cannula 1 and the puncture needle 2 are movable, with the distal end of the cannula 1 and the distal end of the puncture needle 2 moving a distance of 0-10 mm. This movable arrangement makes the puncture operation more flexible. After a successful puncture, the relative positions of the two can be adjusted to achieve specific operational effects. For example, after successful puncture and cessation of blood flow, the puncture needle 2 can remain inside the blood vessel, and the cannula 1 can be slowly withdrawn until blood flows out of the cannula 1, avoiding excessive withdrawal of the cannula 1 from the blood vessel, eliminating the need for re-puncture, and improving operational stability and convenience.

[0035] Comparison and explanation:

[0036] Figure 1 The improved transmural puncture cannula 1 and puncture needle 2 are modified (the head of cannula 1 is changed to an arc shape, and the needle length of cannula 1 is extended by 10mm).

[0037] Figure 2 The modified transmural puncture cannula 1 and puncture needle 2 are combined (the distance between the end of cannula 1 and the end of puncture needle 2 is 10mm; the distance between the end of cannula 1 and the end of puncture needle 2 can be moved 0-10mm).

[0038] Figure 3To perform transvascular puncture, blood flows out from cannula 1. The needle is then advanced until blood flow stops. Once the puncture is successful and blood flow stops, puncture needle 2 remains stationary within the blood vessel. Cannula 1 is then slowly withdrawn until blood flows out from it (cannula 1 remains within the blood vessel, increasing operational stability and preventing excessive withdrawal of cannula 1 and subsequent repeated punctures).

[0039] Figure 4 To remove the first cannula, the cannula remains inside the blood vessel with the tip of the cannula aligned with the direction of the blood vessel. Finally, a wire is inserted (the tip of the cannula has no significant angle with the blood vessel, reducing damage to the blood vessel).

[0040] Figure 5 The device consists of a traditional transmural puncture cannula 1 and a puncture needle 2.

[0041] Figure 6 The combined traditional transmural puncture cannula 1 and puncture needle 2 (the ends of cannula 1 and puncture needle 2 have no moving distance).

[0042] Figure 7 Perform transvascular puncture, allowing blood to flow out through cannula 1. Continue advancing the needle until blood flow stops. Once the puncture is successful and blood flow has ceased, remove puncture needle 2.

[0043] Figure 8 To slowly withdraw cannula 1 until blood flows out of cannula 1, finally insert the steel wire (cannula 1 is easy to slip out of the blood vessel when withdrawing it, requiring puncture again; the tip of cannula 1 is at an angle to the blood vessel, which can easily damage the blood vessel).

[0044] Working principle

[0045] When performing transvascular puncture (taking vascular puncture as an example), this device is first used for puncture: Since the head of cannula 1 is arc-shaped, the arc-shaped head is adapted to the direction of the blood vessel during puncture, reducing damage to the blood vessel; the needle tip of puncture needle 2 is extended by 10mm. When the blood vessel is punctured and blood flows out from cannula 1, when the needle continues to be inserted, the extended needle tip can ensure that it is not easy to withdraw from the blood vessel prematurely during the operation until the blood flow stops, indicating that puncture needle 2 has penetrated the blood vessel wall to the appropriate depth.

[0046] After successful puncture and cessation of blood flow, unlike traditional procedures where the puncture needle 2 is removed, this device keeps the puncture needle 2 stationary, allowing it to remain within the blood vessel. Then, the cannula 1 is slowly withdrawn, utilizing the 0-10mm movable distance between the cannula 1 and the puncture needle 2 to withdraw the cannula 1 until blood flows out. At this point, the cannula 1 remains within the blood vessel, with the curved tip aligned with the direction of the blood vessel. Finally, subsequent procedures such as inserting the wire are performed. Throughout the process, the extended design of the puncture needle 2 and the movable coordination between the cannula 1 and the puncture needle 2 increase the stability of the puncture process and subsequent operations, reducing the possibility of excessive withdrawal of the cannula 1 and repeated punctures. Simultaneously, the curved tip of the cannula 1 reduces damage to the blood vessel.

[0047] The specific embodiments of this utility model have been described in detail above, but they are merely examples, and this utility model is not equivalent to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to this utility model are also within the scope of this utility model. Therefore, all equivalent changes and modifications made without departing from the spirit and scope of this utility model should be covered within the scope of this utility model.

Claims

1. A transmural puncture cannula device, characterized in that, The device includes a puncture cannula (1), which includes a cannula (1) and a puncture needle (2). The cannula (1) is fitted in front of the puncture needle (2). The head of the cannula (1) is arc-shaped, and the tip of the puncture needle (2) is extended. The cannula (1) and the puncture needle (2) are movable between each other.

2. The transmural puncture cannula device according to claim 1, characterized in that, The tip of the puncture needle (2) is extended by 10 mm.

3. The transmural puncture cannula device according to claim 2, characterized in that, The distance between the end of the cannula (1) and the end of the puncture needle (2) is 0-10 mm.

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