Anti-falling artery sheath tube
By setting up elastically straightened folding lever and dilator on the arterial sheath, the problem of easy falling off during use of the arterial sheath is solved, and the stable fixation of the sheath is achieved and the use of multiple positions and angles is achieved, reducing the risk of surgery.
Patent Information
- Application Number
- CN202421311870.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-06-11
AI Technical Summary
Existing arterial sheaths are prone to fall off during fixation and use, and are difficult to use in multiple positions and angles, resulting in unstable catheter access and increasing the complexity and risk of surgery.
An anti-fall arterial sheath is designed. A folding lever position part that can be elastically straightened axially along the center of the sheath body by providing a folding lever position part that can be elastically straightened along the center of the sheath body, and is equipped with a dilator. With the help of a guidewire, the folding lever position part and the proximal end of the dilator are placed into the arterial blood vessel. After the dilator is withdrawn, the folding lever position part will naturally return to position to form a clamping protrusion to prevent the sheath from falling off.
It effectively avoids the arterial sheath from the puncture position, ensures the stability of the catheter passage, facilitates the use of multiple positions and angles, and reduces the complexity and risk of surgery.
Smart Images
Figure CN222787829U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to an anti-falling arterial sheath tube. Background Art
[0002] An arterial sheath is a medical device that is inserted into an artery to provide a pathway for other intravascular therapeutic materials. The arterial sheath in the existing technology is used together with a puncture needle and a guide wire. During the operation, the puncture needle is first inserted into the human artery at an angle of about 30° between the puncture needle and the skin. When the puncture needle pierces the front wall of the blood vessel, the blood return groove on the puncture needle indicates a successful puncture when blood returns. Then the needle core is pulled out and the guide wire is inserted, and the arterial sheath is sent to the target position along the guide wire. After the arterial puncture, the sheath must be retained for a period of time for subsequent surgery.
[0003] In the prior art, the length of the arterial sheath is about 10 cm, and the part outside the human body is usually fixed by adhesive tape, fixing clips, etc., but this method has the following disadvantages:
[0004] First, in the process of fixing the arterial sheath, the arterial sheath is very likely to be twisted or fall off due to factors such as incomplete braking of the patient, friction, and misoperation, thereby making the catheter passage unstable and requiring the arterial sheath to be reinserted. Secondly, the length of the arterial sheath inserted into the human body is relatively long. When the position of the proximal end of the arterial sheath needs to be changed, the arterial sheath fixing structure needs to be removed, and then the arterial sheath is pulled outward so that the length of the arterial sheath in the body is between 0.5cm and 1cm. Then the angle of the arterial sheath toward the target is rotated, and then the arterial sheath is slowly pushed into the body. This process has the following risks: first, when the arterial sheath fixing structure is removed, the arterial sheath is easily pulled out; second, when the catheter moves outward through the arterial sheath, the arterial sheath needs to be fixed, otherwise the arterial sheath may easily be detached from the body. Third, if the arterial sheath is detached from the body, if the catheter remains in the vascular cavity, the arterial sheath can be reinserted into the vascular cavity along the catheter. If a guidewire remains in the vascular lumen but there is no catheter, the arterial sheath dilator must be reinserted to assist in the placement of the arterial sheath. Otherwise, the arterial sheath will not be able to be successfully placed in the vascular lumen again, and may even cause damage to the vascular lumen.
[0005] In view of this, there is an urgent need to design an arterial sheath to prevent the arterial sheath from falling off when in use, while being convenient for use in multiple positions and angles. Utility Model Content
[0006] In view of this, the utility model provides an anti-drop-off arterial sheath tube to prevent the arterial sheath tube from dropping off.
[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0008] An anti-drop-off arterial sheath comprises an arterial sheath and a dilator, wherein the arterial sheath comprises a sheath body, a connector, a hose and a three-way valve, wherein a connector is fixedly arranged at the distal end of the sheath body, one end of the hose is connected to the connector, and the other end of the hose is connected to one end of the three-way valve, and is characterized in that:
[0009] The proximal end of the sheath body is fixed with a folding clamping portion which can be elastically straightened along the central axis of the sheath body and is a hollow tube structure. The dilator body is movably sleeved in the sheath body. The proximal end of the dilator is a conical structure and the front part of the proximal end can pass through the folding clamping portion. The distal end of the dilator extends from the connector.
[0010] Among them, when the front part of the proximal end of the dilator extends out from the folding clamping part, the folding clamping part is straightened by the dilator, and the outer tube diameter of the folding clamping part is smaller than the outer tube diameter of the dilator body. When the proximal end of the dilator is separated from the folding clamping part, the outer tube diameter of the partial structure of the folding clamping part is at least 1.5 times the outer tube diameter of the dilator body.
[0011] In order to better implement the above technical solution, optionally, the folded locking portion includes a first locking portion and a second locking portion, the end of the first locking portion away from the sheath tube body and the end of the second locking portion close to the sheath tube body are an integral structure, and the end of the second locking portion away from the first locking portion is provided with an extension section whose inner tube diameter is smaller than the outer tube diameter of the sheath tube body, and after the first locking portion is straightened, the outer tube diameter of the first locking portion is smaller than the outer tube diameter of the dilator body.
[0012] Optionally, when the first clamping portion is in a natural state, the first clamping portion has an expanded diameter structure from both ends to the middle.
[0013] Optionally, when the first clamping portion is in a natural state, the outer diameter of the middle portion of the first clamping portion is 2-3 times the outer diameter of the sheath tube.
[0014] Optionally, the length of the sheath tube body is 5-6 cm.
[0015] Optionally, an external stop portion is provided on the sheath tube body, and the tube body of the sheath tube between the folded stop portion and the external stop portion is a skin-penetrating tube body.
[0016] Beneficial effects of the utility model:
[0017] The utility model discloses an anti-falling arterial sheath tube. The folding retaining portion which can be elastically straightened along the central axis of the sheath tube body and has a hollow tube structure is arranged at the proximal end of the sheath tube body. The folding retaining portion can be quickly straightened with the help of a dilator. The folding retaining portion and the proximal end of the dilator are inserted into the arterial blood vessel together with the help of a guide wire. After the dilator is withdrawn, the folding retaining portion returns to its original position naturally. The retaining protrusion formed effectively prevents the arterial sheath tube from falling off from the puncture position.
[0018] The utility model discloses an anti-falling arterial sheath tube, which is provided with an external stop portion, so that the tube body of the sheath tube between the folded clamping portion and the external stop portion is a skin-penetrating tube body, and the length of the skin-penetrating tube body can be 0.5cm-1cm. The provision of the second stop portion can prevent the arterial sheath tube from being excessively inserted into the arterial blood vessel, thereby effectively controlling the length of the sheath tube body inserted into the human body. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a front view of the anti-falling arterial sheath tube of Example 1 of the utility model (the folded locking portion is in a natural state);
[0020] Figure 2 It is a front view of the anti-falling arterial sheath tube of Example 1 of the utility model (the folded locking portion is in a straightened state);
[0021] Figure 3 yes Figure 2 Enlarged view of point A in the middle;
[0022] Figure 4 It is a front view of the anti-falling arterial sheath tube of Example 2 of the utility model (the arterial sheath tube is in a natural state);
[0023] Figure 5 It is a front view of the anti-falling arterial sheath tube of Example 2 of the utility model (the folded locking portion is in a straightened state);
[0024] Reference numerals:
[0025] The sheath tube body 10 , the skin-penetrating tube body 101 , the folded locking portion 111 , the first locking portion 1111 , the second locking portion 1112 , the extension section 1113 , the connector 12 , the hose 13 , the three-way valve 14 , the external locking portion 15 , and the dilator 20 . DETAILED DESCRIPTION
[0026] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments, wherein the same components are represented by the same reference numerals.
[0027] Example 1
[0028] See also Figures 1 to 3 The utility model embodiment discloses an anti-drop-off arterial sheath tube, comprising an arterial sheath tube and a dilator 20.
[0029] The arterial sheath comprises a sheath body 10, a connector 12, a hose 13 and a three-way valve 14. The distal end of the sheath body 10 is fixedly provided with a connector 12, one end of the hose 13 is connected to the side wall of the connector 12, and the other end of the hose 13 is connected to one end of the three-way valve 14. The proximal end of the sheath body 10 is fixedly provided with a folding clamping portion 111 which can be elastically straightened along the central axis of the sheath body 10 and is a hollow tube structure. The main body of the dilator 20 is movably sleeved in the sheath body 10. The proximal end of the dilator 20 is a conical structure and the front part of the proximal end can pass through the folding clamping portion 111, and the distal end of the dilator 20 extends from the connector 12.
[0030] In the embodiment of the present invention, the length of the sheath tube body 10 is 5-6 cm, and the length when inserted into the human body is less than 1 cm. The length of the main body of the dilator 20 can be matched with the length of the sheath tube body 10 .
[0031] In the embodiment of the present utility model, the distal end of the expander 20 has a connector, and the connection method between the connector and the connector 12 includes but is not limited to the snap connection and threaded connection in the prior art, and the specific connection method will not be repeated.
[0032] like Figures 1 to 3 As shown, when the front part of the proximal end of the dilator 20 extends out from the folding and locking portion 111, the folding and locking portion 111 is straightened by the dilator 20, and the outer tube diameter of the folding and locking portion 111 is smaller than the outer tube diameter of the main body of the dilator 20. When the proximal end of the dilator 20 is separated from the folding and locking portion 111, the outer tube diameter of the partial structure of the folding and locking portion 111 is at least 1.5 times the outer tube diameter of the main body of the dilator 20.
[0033] Specifically, the proximal end of the dilator 20 is a conical structure, and the front end of the folding and locking portion 111 has a channel for the front part of the conical structure to extend out and the rear part to be clamped in the folding and locking portion 111. When the dilator 20 moves from the distal end to the proximal end of the sheath tube body 10 and part of the structure of the proximal end of the dilator 20 extends from the folding and locking portion 111, the dilator 20 continues to extend, which will drive the folding and locking portion 111 to elastically stretch along the central axis of the sheath tube body 10 until the folding and locking portion 111 is completely straightened. At this time, the outer tube diameter of the folding and locking portion 111 is smaller than the outer tube diameter of the main body of the dilator 20, so that the arterial sheath and the dilator 20 can be partially inserted into the human artery with the help of the guide wire. After the folding and locking portion 111 is inserted into the arterial blood vessel, the dilator 20 is pulled out of the arterial sheath. After the folding and locking portion 111 loses the push effect of the dilator 20, it naturally returns to its original position and folds, and presses against the inner wall of the arterial blood vessel to form a locking protrusion.
[0034] An anti-falling arterial sheath insertion method of an embodiment of the utility model is: first, during the operation, the puncture needle is first punctured into the human artery at an angle of about 30° between the puncture needle and the skin. When the puncture needle pierces the front wall of the blood vessel, the blood return groove on the puncture needle indicates that the puncture is successful after blood returns; then the needle core is pulled out and the guide wire is inserted, and then the dilator 20 is inserted into the arterial sheath, so that the folded clamping portion 111 is completely straightened; thereafter, the proximal end of the arterial sheath and the dilator 20 are simultaneously inserted into the guide wire and sent to the target position along the guide wire, and then the dilator 20 and the guide wire are withdrawn. After the arterial puncture, the sheath must be retained for a period of time for subsequent surgery.
[0035] A method for extracting an anti-dropout arterial sheath tube according to an embodiment of the utility model is as follows: inserting the dilator 20 into the arterial sheath tube so that the folded locking portion 111 is completely straightened, and then extracting the dilator 20 and the sheath tube body 10 at the same time.
[0036] An anti-falling arterial sheath according to an embodiment of the utility model is provided with a folding retaining portion 111 which can be elastically straightened along the central axis of the sheath body 10 and has a hollow tube structure at the proximal end of the sheath body 10. The folding retaining portion 111 can be quickly straightened with the help of a dilator 20. The folding retaining portion 111 and the proximal end of the dilator 20 are inserted into the arterial blood vessel together with the help of a guide wire. After the dilator 20 is withdrawn, the folding retaining portion 111 returns to its original position naturally. The retaining protrusion formed effectively prevents the arterial sheath from falling off from the puncture position.
[0037] In an embodiment of the utility model, an external clamping stop portion 15 is provided on the sheath body 10. The external clamping stop portion 15 may be a diameter expansion convex ring, or a limiter clamped on the sheath body 10. By providing the external clamping stop portion 15, the arterial sheath tube can be prevented from being excessively inserted into the arterial blood vessel. The body of the sheath body 10 between the folded clamping portion 111 and the external clamping stop portion 15 is a skin-penetrating tube body 101. The length of the skin-penetrating tube body 101 may be 0.5cm-1cm. Arterial sheath tubes with different lengths of skin-penetrating tube bodies 101 may be selected for skin of different human bodies. The thicker the skin, the longer the arterial sheath tube with the skin-penetrating tube body 101 may be selected.
[0038] Example 2
[0039] See also Figure 4 and Figure 5 This embodiment is similar to Embodiment 1, except that:
[0040] The folded locking portion 111 includes a first locking portion 111 and a second locking portion 112. The end of the first locking portion 111 away from the sheath body 10 and the end of the second locking portion 112 close to the sheath body 10 are an integral structure. The end of the second locking portion 112 away from the first locking portion 111 is provided with an extension section 1113 whose inner diameter is smaller than the outer diameter of the sheath body 10. After the first locking portion 111 is straightened, the outer diameter of the first locking portion 111 is smaller than the outer diameter of the dilator 20 body.
[0041] In an embodiment of the utility model, the folding clamping portion 111 is made of medical elastic plastic material, and the folding clamping portion 111 and the sheath tube body 10 are connected into one by a heat fusion process. The hardness of the folding clamping portion 111 is less than the hardness of the sheath tube body 10, but the elasticity of the folding clamping portion 111 is higher than the elasticity of the sheath tube body 10. The second clamping portion 112 can be used as a straightening point, and the first clamping portion 111 can be used as a straightening body, so that the straightening point and the straightening body are separated from each other, so that the straightening body is subjected to uniform force when straightening.
[0042] In an embodiment of the utility model, when the first locking portion 1111 is in a natural state, the first locking portion 1111 has an expanded diameter structure from both ends to the middle portion, so that the first locking portion 1111 can form a convex ring structure, thereby improving the anti-falling effect of the first locking portion 1111. Preferably, when the first locking portion 1111 is in a natural state, the outer diameter of the middle portion of the first locking portion 1111 is 2-3 times the outer diameter of the sheath tube body 10.
[0043] The technical solution of the utility model is described in detail above in combination with specific embodiments, and the described specific embodiments are used to help understand the concept of the utility model. Derivations and variations made by those skilled in the art based on the specific embodiments of the utility model also fall within the protection scope of the utility model.
Claims
1. An anti-drop arterial sheath tube, comprising an arterial sheath tube and a dilator (20), wherein the arterial sheath tube comprises a sheath tube body (10), a connector (12), a hose (13) and a three-way valve (14), wherein the distal end of the sheath tube body (10) is fixedly provided with a connector (12), one end of the hose (13) is connected to the connector (12), and the other end of the hose (13) is connected to one end of the three-way valve (14), characterized in that: The proximal end of the sheath tube body (10) is fixedly provided with a folding clamping portion (111) which can be elastically straightened along the central axis of the sheath tube body (10) and is a hollow tube structure; the main body of the dilator (20) is movably sleeved inside the sheath tube body (10); the proximal end of the dilator (20) is a conical structure and the front part of the proximal end can pass through the folding clamping portion (111); the distal end of the dilator (20) extends from the connector (12); When the front part of the proximal end of the dilator (20) extends out from the folding and locking portion (111), the folding and locking portion (111) is straightened by the dilator (20), and the outer tube diameter of the folding and locking portion (111) is smaller than the outer tube diameter of the dilator (20) body; when the proximal end of the dilator (20) is separated from the folding and locking portion (111), the outer tube diameter of the partial structure of the folding and locking portion (111) is at least 1.5 times the outer tube diameter of the dilator (20) body.
2. The anti-fall-off arterial sheath according to claim 1, characterized in that: The folding locking portion (111) comprises a first locking portion (1111) and a second locking portion (1112); the end of the first locking portion (1111) away from the sheath tube body (10) and the end of the second locking portion (1112) close to the sheath tube body (10) are an integral structure; the end of the second locking portion (1112) away from the first locking portion (1111) is provided with an extension section (1113) whose inner tube diameter is smaller than the outer tube diameter of the sheath tube body (10); after the first locking portion (1111) is straightened, the outer tube diameter of the first locking portion (1111) is smaller than the outer tube diameter of the dilator (20) body.
3. The anti-fall-off arterial sheath according to claim 2, characterized in that: When the first locking portion (1111) is in a natural state, the first locking portion (1111) has an expanded diameter structure from both ends to the middle.
4. The anti-fall-off arterial sheath according to claim 3, characterized in that: When the first locking portion (1111) is in a natural state, the outer diameter of the middle portion of the first locking portion (1111) is 2-3 times the outer diameter of the sheath tube body (10).
5. The anti-fall-off arterial sheath according to claim 1, characterized in that: The length of the sheath tube body (10) is 5-6 cm.
6. The anti-fall-off arterial sheath according to claim 1, characterized in that: The sheath tube body (10) is provided with an external stop portion (15), and the tube body of the sheath tube body (10) between the folding stop portion (111) and the external stop portion (15) is a skin-penetrating tube body (101).