Catheter special for adrenal vein blood sampling
By designing a special catheter for adrenal venous blood extraction, using the outlet and empty groove structure at the head end of the catheter to isolate the drug, the problem of drug residue affecting blood accuracy is solved, and the reusability of the catheter and the accuracy of blood collection are achieved.
Patent Information
- Application Number
- CN202420337244.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-23
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-02-23
AI Technical Summary
The drug components in the existing adrenal venous blood retrieval catheter are prone to remain, affecting the accuracy of the blood. Especially when used multiple times, it is difficult to avoid contact between the drug and the blood, resulting in inaccurate blood collection.
A special catheter for adrenal venous blood extraction is designed, including the catheter body, the drug tube and the second catheter. Through the outlet and hollow groove structure at the head end of the catheter, the drug is isolated from the blood when no injection is required, ensuring that the drug does not remain in the catheter. The inner wall adopts polydimethylsiloxane material and a three-layer composite tube structure. The catheter head end can be rotated for easy insertion into the adrenal vein.
Effectively prevent drug residues from affecting blood collection, ensure blood accuracy and reusability of catheters. The catheter structure is designed to facilitate insertion into adrenal veins, reduce blood contamination and improve diagnosis reliability.
Smart Images
Figure CN222323559U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a special catheter for collecting blood from adrenal vein. Background Art
[0002] The adrenal vein blood collection catheter is inserted through the femoral vein or upper limb vein, and the catheter port is placed in the bilateral adrenal veins to collect blood, measure the aldosterone level in the adrenal veins on both sides, and correct it with cortisol to determine whether the excessive secretion of aldosterone is unilateral or bilateral. Unilateral surgery can be performed, while bilateral medication is used for treatment. It is more often used to differentiate between adrenal hyperplasia and tumors.
[0003] Usually when blood is drawn from the adrenal vein, drugs are injected through a catheter. Usually, one catheter is used. Sometimes the drug components will remain on the inner wall of the catheter. When blood is drawn next time, it will come into contact with the blood and indirectly affect the accuracy of the blood. Utility Model Content
[0004] The utility model aims to solve the shortcomings in the prior art and provides a special catheter for collecting blood from the adrenal vein.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a special catheter for blood sampling from the adrenal vein, comprising a catheter body, wherein a medicine branch pipe and a second catheter branch pipe are respectively arranged inside the catheter body, the catheter body is installed at one end of an outer shell, one end of the medicine branch pipe and the second catheter branch pipe respectively passes through the interior of the outer shell and is fixedly connected to the first catheter branch pipe and the medicine tube body, the ends of the first catheter branch pipe and the medicine tube body are fixedly connected to a catheter seat, the other side of the catheter body is rotatably connected to a catheter head end, the end of the catheter head end is rotatably connected to a pipe mouth, and the second catheter branch pipe is connected to the pipe mouth.
[0006] As a further description of the above technical solution:
[0007] An outlet is arranged on the outer side of the catheter head end, and an empty groove is arranged on one end of the inner side of the tube mouth; the empty groove, the medicine tube branch pipe and the outlet are connected.
[0008] As a further description of the above technical solution:
[0009] The first conduit branch is a three-layer composite pipe, consisting of an outer layer, an intermediate layer and an inner layer.
[0010] As a further description of the above technical solution:
[0011] The catheter body is 65-75CM long, 2mm thick, and is made of polydimethylsiloxane.
[0012] As a further description of the above technical solution:
[0013] The two medicine tube bodies and the outer ends of the first catheter branch pipe are both provided with valves.
[0014] As a further description of the above technical solution:
[0015] The catheter seat is a tapered tubular structure with an outer diameter that uniformly expands outwards.
[0016] The utility model has the following beneficial effects:
[0017] 1. In the utility model, the outlet and the empty slot are aligned so that the medicine flows into the inside of the medicine branch through the medicine tube body. When the medicine does not need to be injected, the catheter body is slightly rotated so that the outlet and the empty slot are staggered to prevent blood from entering. The separate medicine branch can ensure that the wall of the second catheter branch is not affected by the medicine, which is convenient for blood collection next time.
[0018] 2. In the present invention, the span of the circular curved section can be slightly smaller than the diameter of the inferior vena cava, which facilitates the movement of the catheter to the head end to enter the opening of the suprarenal vein. The semicircular curved section can maintain a stable overall shape under radial compression and can be smoothly moved to the vein opening in the inferior vena cava. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a side view of a special catheter for collecting blood from the adrenal vein proposed by the utility model;
[0020] Figure 2 This is a front view of a special catheter for collecting blood from the adrenal vein proposed by the utility model;
[0021] Figure 3 The utility model is a schematic diagram of a slide rail of a special catheter for collecting blood from the adrenal vein.
[0022] Legend:
[0023] 1. Catheter body; 2. First catheter branch; 2-1. External layer of the tube body; 2-2. Middle layer of the tube body; 2-3. External layer of the tube body; 3. Medicine tube body; 4. Valve; 5. Catheter seat; 6. Outer shell; 7. Medicine tube branch; 8. Second catheter branch; 9. Tube opening; 10. Catheter head end; 11. Outlet; 12. Empty slot. DETAILED DESCRIPTION
[0024] 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 without creative work are within the scope of protection of the utility model.
[0025] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0026] Reference Figure 1-3 The utility model provides an embodiment: a special catheter for blood sampling from the adrenal vein, comprising a catheter body 1, wherein a medicine branch pipe 7 and a second catheter branch pipe 8 are respectively arranged inside the catheter body 1, the catheter body 1 is installed at one end of a shell 6, one end of the medicine branch pipe 7 and the second catheter branch pipe 8 respectively passes through the inside of the shell 6 and is fixedly connected to the first catheter branch pipe 2 and the medicine tube body 3, the ends of the first catheter branch pipe 2 and the medicine tube body 3 are fixedly connected to a catheter seat 5, the other side of the catheter body 1 is rotatably connected to a catheter head end 10, and the end of the catheter head end 10 is rotatably connected to a tube The doctor introduces the catheter body 1 into the inferior vena cava. The catheter body 1 is convenient for entering the human body due to its curved shape. The doctor operates the catheter body 1 to reach the vicinity of the opening of the left renal vein or the right adrenal vein. It is determined whether the tube mouth 9 is aligned with the entrance of the left renal vein or the right adrenal vein. After adjusting the alignment, a small amount of injection of contrast marker is introduced from the head end of the tube mouth 9. After the contrast is confirmed to be the adrenal vein, blood will be taken from the microcatheter. The blood is sent to the test tube through the first catheter branch 2 and the catheter seat 5 for inspection. Multiple test tubes can increase the accuracy of the blood.
[0027] An outlet 11 is provided on the outside of the catheter head end 10, and an empty groove 12 is provided on the inner end of the tube mouth 9. The empty groove 12, the drug tube branch 7, and the outlet 11 are connected. The separate drug tube branch 7 can ensure that the tube wall of the second catheter branch 8 is not affected by the drug, which is convenient for blood collection next time.
[0028] The first conduit branch pipe 2 is a three-layer composite pipe, which consists of a pipe body outer layer 2 - 1 , a pipe body middle layer 2 - 2 , and a pipe body inner layer 2 - 3 , thereby ensuring the safety of the first conduit branch pipe 2 .
[0029] The catheter body 1 has a length of 65-75CM, a thickness of 2mm, and is made of polydimethylsiloxane. The catheter body 1 is existing and has a certain scientific basis and is adapted to the patient's physical needs.
[0030] The two medicine tube bodies 3 and the outer ends of the first catheter branch tube 2 are both provided with valves 4 to prevent blood from flowing back.
[0031] The catheter seat 5 is a tapered tubular structure with an outer diameter that uniformly expands outwards, which facilitates the collection of blood.
[0032] Working principle: the doctor introduces the catheter body 1 into the inferior vena cava. The catheter body 1 is easy to enter the human body due to its curved shape. The catheter body 1 is operated to reach the vicinity of the opening of the left renal vein or the right adrenal vein. It is determined whether the tube mouth 9 is aligned with the entrance of the left renal vein or the right adrenal vein. After adjusting the alignment, a small amount of injection contrast marker is introduced from the head end of the tube mouth 9. After the contrast is confirmed to be the adrenal vein, blood will be drawn from the microcatheter. The blood is sent to the test tube through the first catheter branch 2 and the catheter seat 5 for inspection. Multiple test tubes can increase the accuracy of the blood. When it is necessary to inject drugs into the left renal vein or the right adrenal vein, the catheter body 1 can be slightly rotated, and the outlet 11 and the empty groove 12 can be aligned, so that the drug flows into the inside of the drug tube branch 7 through the drug tube body 3. When it is not necessary to inject drugs, the catheter body 1 is slightly rotated so that the outlet 11 and the empty groove 12 are staggered to prevent blood from entering. The separate drug tube branch 7 can ensure that the wall of the second catheter branch 8 is not affected by the drug, which is convenient for blood collection next time.
[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A catheter for collecting blood from the adrenal vein, comprising a catheter body (1), characterized in that: The interior of the catheter body (1) is respectively provided with a medicine tube branch (7) and a second catheter branch (8); the catheter body (1) is mounted on one end of the outer shell (6); one end of the medicine tube branch (7) and the second catheter branch (8) respectively passes through the interior of the outer shell (6) and is fixedly connected to the first catheter branch (2) and the medicine tube body (3); the ends of the first catheter branch (2) and the medicine tube body (3) are both fixedly connected to a catheter seat (5); the other side of the catheter body (1) is rotatably connected to a catheter head end (10); the end of the catheter head end (10) is rotatably connected to a pipe mouth (9); and the second catheter branch (8) is communicated with the pipe mouth (9).
2. The adrenal vein blood sampling catheter according to claim 1, characterized in that: An outlet (11) is arranged on the outside of the catheter head end (10), and an empty groove (12) is arranged on one end of the inner side of the tube opening (9); the empty groove (12), the medicine tube branch (7), and the outlet (11) are connected.
3. The dedicated catheter for collecting blood from the adrenal vein according to claim 1, characterized in that: The first conduit branch pipe (2) is a three-layer composite pipe, consisting of a pipe body outer layer (2-1), a pipe body middle layer (2-2), and a pipe body inner layer (2-3).
4. The dedicated catheter for collecting blood from the adrenal vein according to claim 1, characterized in that: The catheter body (1) has a length of 65-75 cm, a thickness of 2 mm, and is made of polydimethylsiloxane.
5. The dedicated catheter for collecting blood from the adrenal vein according to claim 1, characterized in that: The two medicine tube bodies (3) and the outer ends of the first catheter branch tube (2) are both provided with valves (4).
6. The dedicated catheter for collecting blood from the adrenal vein according to claim 1, characterized in that: The catheter seat (5) is a tapered tubular structure with an outer diameter that uniformly expands outwards.