Single-bend catheter for right adrenal vein radiography and blood sampling

Abstract

The utility model relates to the technical field of medical instruments, in particular to a single-bend catheter for right adrenal vein angiography and blood sampling, which comprises a guide part for leading out right adrenal vein blood. The tail end of the guiding part is connected with a connecting part. And the bending part is arc-shaped, so that the shape of the right adrenal gland vein is more fit. A guide head is arranged at the front end of the bent part, at least one through hole is formed in the side, close to the guide head, of the bent part, right adrenal vein blood can flow back to be taken through an end hole of the guide head and the through hole in the side edge of the bent part, and even if the guide head is incarcerated, the right adrenal vein blood can flow back into a catheter cavity through the through hole. And the blood sampling difficulty and the blood sampling time are reduced. The guide head is of a conical structure, the area of the end face of the end, away from the bent part, of the guide head is minimum, the incarceration risk is reduced, the guide head can enter the right adrenal vein easily, right adrenal vein radiography and the blood taking catheter can complete examination smoothly, and therefore the clinical diagnosis and treatment purpose is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a single-bend catheter used for right adrenal venography and blood sampling. Background Art

[0002] At present, there is no dedicated catheter for right adrenal vein interventional intraoperative angiography diagnosis and intraoperative blood sampling in the medical market at home and abroad. Data show that the right adrenal vein is 3-15mm long, 3.5-5mm in diameter, and the width of the inferior vena cava in the adrenal vein segment is about 30mm. The insertion of an ordinary catheter may cause the distal end hole to be incarcerated, making it impossible to perform angiography and blood sampling. In current actual clinical work, when taking blood from the right adrenal vein, the interventional doctor will use an injection needle to drill a small hole in the front section of the angiography catheter based on his or her work experience. Due to different experiences, multiple angiography catheters may be damaged during the operation, but the purpose of right adrenal vein angiography and blood sampling cannot be completed; at the same time, the angiography catheters on the market are mainly arterial, and the curved section at the front end of the catheter is too small, and most of them cannot directly reach the walls of the inferior vena cava on both sides. During the operation, the doctor needs to shape the curved section at the front end of the catheter according to the patient's inferior vena cava. The surface of the puncture site is rough and blind, which increases the risk of surgery. It also causes both patients and doctors to be exposed to X-rays for a longer time and increase medical costs. At the same time, foreign matter may remain in the blood vessel cavity, causing medical risks. Utility Model Content

[0003] In order to solve the technical defects mentioned in the above background technology, the purpose of the utility model is to provide a single-bend catheter for right adrenal venography and blood sampling.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A single-bend catheter for right adrenal venography and blood sampling, comprising a guide portion for guiding out right adrenal venous blood, wherein the tail end of the guide portion is connected to a connection portion connected to a syringe; the head end of the guide portion is connected to an arc-shaped bending portion, and the bending portion is connected to the inside of the guide portion; a guide head is provided at the front end of the bending portion, and at least one through hole for guiding right adrenal venous blood into the bending portion is provided on a side of the bending portion close to the guide head; the bending portion, the guide portion and the guide head are integrally formed; the guide head is made of a flexible material, and the guide head is configured as a conical structure, and the end surface area of ​​the guide head at one end away from the bending portion is the smallest.

[0006] By adopting the above technical solution, the bending part is set to an arc shape, and the curved section of the right adrenal vein blood collection catheter is parabolic, which is more in line with the shape of the right adrenal vein, thereby improving the guidance success rate and the efficiency of blood collection from the right adrenal vein. A guide head is provided at the front end of the bending part, and at least one through hole for guiding the right adrenal vein blood into the bending part is provided on the side of the bending part close to the guide head. The right adrenal vein blood can flow back through the end hole of the guide head and the through hole on the side of the bending part for blood collection. Even if the guide head is incarcerated, the right adrenal vein blood can flow back into the catheter cavity through the through hole, thereby reducing the difficulty of blood collection and the time required for blood collection. The guide head is set to a conical structure, and the end face area of ​​the end of the guide head away from the bending part is the smallest, thereby reducing the risk of incarceration, improving the efficiency of guidance, and making it easy for the guide head to enter the right adrenal vein. The right adrenal vein angiography and blood collection catheter can complete the examination more smoothly, thereby achieving the purpose of clinical diagnosis and treatment.

[0007] Furthermore, the end face diameter of the guide head at one end away from the bending portion is set to 3.9Fr-4.1Fr, so as to facilitate smooth guidance into the right adrenal vein and improve efficiency.

[0008] Furthermore, the length of the guide head is set to 1.9 mm-2.1 mm, which has a good imaging effect and is easier to enter the right adrenal vein.

[0009] Furthermore, the through hole is configured as a truncated cone structure, and the diameter of the inner side of the through hole is smaller than the diameter of the outer side of the through hole. The blood in the right adrenal vein can more easily flow from the outer wall of the guide head through the through hole into the bending part, thereby improving the efficiency of blood collection and shortening the time of blood collection.

[0010] Furthermore, the angle between the hole wall of the through hole and the tangent line of the surface of the bent portion away from the end of the through hole is set to 100 degrees, so as to facilitate blood to enter the through hole.

[0011] Furthermore, the diameter of the outer side of the through hole is set to 1 mm, which does not affect the blood flow and is more conducive to venous blood collection.

[0012] Furthermore, the distance between the outer center of the through hole and the end of the guide head away from the bending portion is set to 2.9mm-3.1mm, ensuring that the guide head is located in the right adrenal vein, thereby ensuring that the drawn blood flows out from the right adrenal vein, thereby improving the accuracy and efficiency of detection.

[0013] Furthermore, the guide portion is arranged as a straight line structure, and the central axis of the guide portion is arranged to intersect with the guide head, so that the end of the guide portion can easily overlap the opposite side wall, thereby improving the development effect.

[0014] In summary, the beneficial effects of the utility model are:

[0015] The utility model has a curved section that is set in an arc shape, and the curved section of the right adrenal vein blood collection catheter is parabolic, which is more in line with the shape of the right adrenal vein, thereby improving the success rate of guidance and the efficiency of blood collection from the right adrenal vein. A guide head is provided at the front end of the curved section, and at least one through hole for introducing the right adrenal vein blood into the curved section is provided on the side of the curved section close to the guide head. The right adrenal vein blood can flow back through the end hole of the guide head and the through hole on the side of the curved section for blood collection. Even if the guide head is incarcerated, the right adrenal vein blood can flow back into the catheter cavity through the through hole, thereby reducing the difficulty of blood collection and the time required for blood collection. The guide head is set in a conical structure, and the end surface area of ​​the end of the guide head away from the curved section is the smallest, thereby reducing the risk of incarceration, improving the efficiency of guidance, and making it easy for the guide head to enter the right adrenal vein. The right adrenal vein angiography and blood collection catheter can be completed more smoothly, thereby achieving the purpose of clinical diagnosis and treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic diagram of the cross-sectional structure of a single-bend catheter used for right adrenal venography and blood sampling.

[0017] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure in .

[0018] Description of reference numerals in the figures:

[0019] 1. Single-bend catheter used for right adrenal venography and blood sampling; 2. Connecting portion; 3. Guide portion; 4. Bend portion; 5. Through hole; 6. Guide head. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0021] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0022] In the description of the utility model, if there is a word description such as "several", it means one or more, and the meaning of "more" is two or more. Greater than, less than, and more than are understood to exclude the number itself, and above, below, and within are understood to include the number itself. If there is a description of the first, second, and third, it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0023] The following is combined with Figure 1-2 , the embodiments of the utility model are further described in detail.

[0024] A single curved catheter 1 for right adrenal venography and blood sampling, such as Figure 1 , Figure 2 As shown, it includes a guide portion 3 for guiding out the right adrenal venous blood. The tail end of the guide portion 3 is connected to a connecting portion 2 connected to a syringe. The head end of the guide portion 3 is connected to an arc-shaped bending portion 4, and the bending portion 4 is connected to the inside of the guide portion 3. A guide head 6 is provided at the front end of the bending portion 4, and at least one through hole 5 for guiding the right adrenal venous blood into the bending portion 4 is provided on one side of the bending portion 4 close to the guide head 6. In this embodiment, two through holes 5 are provided, and are symmetrically arranged on both sides of the bending portion 4. The bending portion 4, the guide portion 3 and the guide head 6 are integrally formed. The guide head 6 is set to be a flexible material, and the guide head 6 is set to be a conical structure, and the end surface area of ​​the guide head 6 at the end away from the bending portion 4 is the smallest.

[0025] The bending portion 4 is set to an arc shape, and the arc length of the curved section is 30mm. The curved section of the right adrenal vein blood collection catheter is parabolic, which is more in line with the shape of the right adrenal vein, thereby improving the guidance success rate and the efficiency of blood collection from the right adrenal vein. A guide head 6 is set at the front end of the bending portion 4. At least one through hole 5 for introducing the right adrenal vein blood into the bending portion 4 is set on the side of the bending portion 4 close to the guide head 6. The right adrenal vein blood can flow back through the end hole of the guide head 6 and the through hole 5 on the side of the bending portion 4 for blood collection. Even if the guide head 6 is incarcerated, the right adrenal vein blood can also flow back into the catheter cavity through the through hole 5, thereby reducing the difficulty of blood collection and the time required for blood collection. The guide head 6 is set to a conical structure, and the end surface area of ​​the end of the guide head 6 away from the bending portion 4 is the smallest, thereby reducing the risk of incarceration, improving the efficiency of guidance, and making it easy for the guide head to enter the right adrenal vein. The right adrenal vein angiography and blood collection catheter can complete the examination more smoothly, thereby achieving the purpose of clinical diagnosis and treatment.

[0026] In this embodiment, the guide part 3 is set as a straight structure, the tube length of the guide part 3 is 80cm, and it is made of hard polymer material. The central axis of the guide part 3 is arranged to intersect with the guide head 6 so that the end of the guide part 3 can easily overlap the opposite side wall to improve the development effect.

[0027] The diameter of the end of the guide portion 3 connected to the connecting portion 2 is set to 5Fr. The end face diameter of the end of the guide head 6 away from the bending portion 4 is set to 3.9Fr-4.1Fr, and can be specifically set to 4Fr, so as to smoothly guide it into the right adrenal vein and improve efficiency. Among them, 1Fr = 0.33mm.

[0028] The length of the guide head 6 is set to 1.9 mm-2.1 mm, and can be specifically set to 2 mm, which has a good imaging effect and makes it easier to enter the right adrenal vein.

[0029] The through hole 5 is set to a truncated cone structure, and the diameter of the inner side of the through hole 5 is smaller than the diameter of the outer side of the through hole 5. The blood in the right adrenal vein can more easily flow from the outer wall of the guide head 5 through the through hole 5 to the bending part 4, thereby improving the efficiency of blood collection and shortening the time of blood collection.

[0030] The angle between the hole wall of the through hole 5 and the end of the tangent line of the surface of the bent portion 4 away from the through hole 5 is set to 100 degrees, so as to facilitate blood to enter the through hole 5.

[0031] The distance between the outer center of the through hole 5 and the end of the guide head 6 away from the bend 4 is set to 2.9mm-3.1mm, ensuring that the guide head is located in the right adrenal vein, thereby ensuring that the drawn blood flows out of the right adrenal vein, improving the accuracy and efficiency of the detection. Among them, the distance between the outer center of the through hole 5 and the end of the guide head 6 away from the bend 4 can be set to 3mm. Specifically, the diameter of the outer side of the through hole 5 is set to 1mm, which does not affect the blood flow and is more conducive to venous blood collection. The length of the through hole 5 from the end of the guide head 6 is set to 3mm.

[0032] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A single curved catheter (1) for right adrenal venography and blood sampling, characterized in that: The invention comprises a guide portion (3) for guiding out right adrenal venous blood, wherein the tail end of the guide portion (3) is connected to a connecting portion (2) connected to a syringe; the head end of the guide portion (3) is connected to an arc-shaped bending portion (4), and the bending portion (4) is arranged to communicate with the inside of the guide portion (3); a guide head (6) is arranged at the front end of the bending portion (4), and at least one through hole (5) for guiding right adrenal venous blood into the bending portion (4) is arranged on a side of the bending portion (4) close to the guide head (6); the bending portion (4), the guide portion (3) and the guide head (6) are integrally formed; the guide head (6) is made of a flexible material, and the guide head (6) is arranged in a conical structure, and the end surface area of ​​the end of the guide head (6) away from the bending portion (4) is the smallest.

2. The single-bend catheter (1) for right adrenal venography and blood sampling according to claim 1, characterized in that: The end face diameter of the guide head (6) away from the bending portion (4) is set to 3.9Fr-4.1Fr.

3. The single-bend catheter (1) for right adrenal venography and blood sampling according to claim 1, characterized in that: The length of the guide head (6) is set to 1.9 mm-2.1 mm.

4. The single-bend catheter (1) for right adrenal venography and blood sampling according to claim 1, characterized in that: The through hole (5) is configured as a truncated cone structure, and the diameter of the inner side of the through hole (5) is smaller than the diameter of the outer side of the through hole (5).

5. The single-bend catheter (1) for right adrenal venography and blood sampling according to claim 4, characterized in that: The angle between the hole wall of the through hole (5) and the end of the tangent line of the surface of the bent portion (4) away from the through hole (5) is set to 100 degrees.

6. The single-bend catheter (1) for right adrenal venography and blood sampling according to claim 4, characterized in that: The diameter of the outer side of the through hole (5) is set to 1 mm.

7. The single-bend catheter (1) for right adrenal venography and blood sampling according to claim 1, characterized in that: The distance between the outer center of the through hole (5) and the end of the guide head (6) away from the bending portion (4) is set to 2.9 mm-3.1 mm.

8. The single-bend catheter (1) for right adrenal venography and blood sampling according to claim 1, characterized in that: The guide portion (3) is arranged as a straight line structure, and the central axis of the guide portion (3) is arranged to intersect with the guide head (6).

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