Arenal gland vein blood sampling catheter

Abstract

The invention discloses an adrenal vein blood taking catheter, and relates to the technical field of medical instruments, the adrenal vein blood taking catheter comprises an adjustable bending sheath tube, an inner catheter and an adjusting assembly, the inner catheter is installed in the adjustable bending sheath tube, a bending part is arranged at the front end of the inner catheter, the rear end of the inner catheter is arranged on the adjusting assembly, and the adjusting assembly comprises a sleeving part, a rotating part and a sliding part. The rotating part is matched with the sliding part, so that the inner catheter is accurately close to the blood taking position of the adrenal vein, the flexibility of the far end of the adjustable bending sheathing canal is improved, and the adjustable bending sheathing canal can cope with complex and changeable anatomical structures of the adrenal vein and adapt to individualized physiological anatomical structures of the adrenal vein.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an adrenal vein blood collection catheter. Background Art

[0002] The adrenal veins, also known as central veins, run alongside arteries of the same name arising from the adrenal hilum. The left central vein maintains a constant position along the entire longitudinal axis of the left adrenal gland, descending to join the inferior phrenic vein before entering the left renal vein, usually approximately 1 cm to the left of the spine. The phrenic adrenal vein trunk can be of variable length. Rarely, the inferior phrenic vein and the left adrenal vein drain separately into the left renal vein, or the left adrenal vein drains directly into the inferior vena cava. The right central vein often angles caudally. The right central vein may be bifurcated or, rarely, trifurcated. Branches may drain into the inferior phrenic or right renal veins, but one central vein always enters the IVC.

[0003] The right central vein typically emerges from the medial aspect of the gland, while some adrenal veins emerge from the superior aspect. Based on their morphology, they can be divided into five distinct types: ① consisting of a central trunk and numerous branches; the angle between the trunk and branches is less than 90°, forming a characteristic glandular-like structure. Occasionally, these veins are difficult to distinguish from the accessory hepatic vein. ② delta-shaped, lacking distinct internal branching structures. ③ triangular, with densely packed vessels exhibiting a brush-like appearance. ④ adrenal vessels are difficult to identify, but the location and orientation of the major vessels are characteristic and consistent with their CT findings. ⑤ one central vein with its sparse, stellate or spider-like branches. Additionally, the adrenal glands have numerous superficial and emissary veins, which communicate with the renal veins, intercostal veins, phrenic veins, or the inferior vena cava. The renal capsule veins extend from the surface of the gland into the perirenal fat and even into the renal capsule, often communicating with the subphrenic or intercostal veins. On the right side, these veins may enter the right renal vein, while on the left, they may communicate with the azygos, hemiazygos, and left renal veins.

[0004] Bilateral adrenal venous sampling (AVS) is a crucial step in the diagnosis of primary aldosteronism and the most reliable and accurate method for distinguishing unilateral or bilateral aldosterone secretion. However, this technique is challenging and carries significant risks. Due to the significant anatomical variability of the adrenal vein, there is no single catheter specifically designed for adrenal venous sampling. Commonly used catheters include the MPA1, TIG, FJR5, Simmons I, C2, and Cobra catheters. For right adrenal vein cannulation, 5F Cobra 2, Simmons I, and Sidewinder catheters are commonly used, while for left adrenal vein cannulation, 5F Simmons III, Cobra 2, MK1B, and Sidewinder catheters are used. However, these catheters are rigid in shape and complex to perform, making them difficult to adapt to the diverse anatomy of the adrenal vein. This leads to low success rates and high complication rates. A dedicated adrenal venous sampling catheter is urgently needed.

[0005] The existing technology often cooperates with an adjustable bend sheath for interventional diagnosis and treatment, such as the adjustable bend catheter disclosed in patent CN114681754B, which is provided with a sheath with a bendable section and a first traction wire and a second traction wire anchored on the bendable section of the sheath, and is also provided with a driving mechanism for pulling and releasing the first traction wire and the second traction wire. When the driving mechanism pulls any one of the first traction wire and the second traction wire to make the sheath bend toward the side of the pulled traction wire, the other traction wire is released accordingly, so that the sheath can be bent in two directions in at least two directions at its bendable section. In this way, it can fully meet the needs of interventional treatment of complex lesions such as twisted blood vessels and variable blood vessel opening positions, greatly reducing the frequency of clinical operators having to adjust and replace catheters multiple times, thereby making the operation easier to operate and reducing the risk of complications.

[0006] However, even with the development of various pre-shaped distal interventional diagnostic and therapeutic sheaths with adjustable shapes and angles, the following situation frequently occurs in clinical use: Due to the significant individual differences in the physiological and anatomical structure of the adrenal vein, even distal adjustable curved sheaths designed based on the specific human anatomy cannot adapt to the individual physiological and anatomical structure. Based on this, an adrenal vein blood collection catheter is proposed. Summary of the Invention

[0007] The present invention aims to provide an adrenal vein blood collection catheter to solve the problem that due to the large individual differences in the physiological and anatomical structure of the adrenal vein, even a distal pre-shaped sheath designed according to the specific physiological and anatomical structure of the human body cannot adapt to the individual physiological and anatomical structure.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] An adrenal vein blood collection catheter includes an adjustable bend sheath, an inner catheter and an adjustment component. The inner catheter is installed in the adjustable bend sheath, a bending portion is provided at the front end of the inner catheter, and the rear end of the inner catheter is provided on the adjustment component. The adjustment component includes a sleeve portion, a rotating portion and a sliding portion. The sleeve portion is installed at the rear end of the adjustable bend sheath, one end of the rotating portion is fixed on the sleeve portion, and the end away from the sleeve portion forms a rotational connection relationship with the sliding portion. The sliding portion is fixedly connected to the inner catheter, allowing the inner catheter to slide relatively.

[0010] Furthermore, the sleeve portion includes a cavity that is recessed inward to form an open end, and the rear end of the adjustable bending sheath tube is accommodated inside the cavity. The cavity and the adjustable bending sheath tube form an interference fit.

[0011] Furthermore, the sleeve portion is made of elastic rubber.

[0012] Furthermore, the rotating portion includes a convex portion and a concave portion, the convex portion protrudes outward to form a T-shaped cylinder, the concave portion is sunken inward to accommodate the convex portion, the convex portion is fixedly connected to the sleeve portion, and the concave portion is fixedly connected to the sliding portion.

[0013] Furthermore, the sliding portion includes a pull button and a sliding sleeve shaft, the interior of the sliding sleeve shaft is a chamber for accommodating the inner catheter, the pull button is sleeved on the sliding sleeve shaft, and a sliding groove is provided on the sliding sleeve shaft, and the pull button is connected to the inner catheter through the sliding groove.

[0014] Furthermore, a flange is provided on the inner conduit, and the flange is arranged in a cavity inside the sliding sleeve shaft. A pull shaft connected to the flange is provided on the pull button.

[0015] Furthermore, the sliding groove is one or more.

[0016] Furthermore, a cavity for accommodating the inner catheter is provided inside the sleeve portion, the rotating portion and the sliding portion.

[0017] The principle and beneficial effects of this technical solution:

[0018] The present invention draws blood from the adrenal vein through an inner catheter combined with an adjustable bend sheath. The inner catheter passes through the interior of the adjustable bend sheath, and a bend is provided at the distal end thereof. Before use, the bend is accommodated in the front end of the adjustable bend sheath. When the adjustable bend sheath is bent to align near the adrenal vein blood collection site, the inner catheter is rotated in the sheath by adjusting the rotating portion of the assembly to align the bend to a suitable position, and then the inner catheter is slid forward by the sliding portion to protrude the bend. Since the bend is a pre-set shape, the inner catheter, which loses the constraint of the front end of the adjustable bend sheath, can bend toward the target position while protruding. The rotating portion cooperates with the sliding portion to make the inner catheter accurately approach the adrenal vein blood collection site, thereby increasing the flexibility of the distal end of the adjustable bend sheath, being able to cope with the complex and changeable anatomical structure of the adrenal vein and adapt to the individualized physiological and anatomical structure of the adrenal vein. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an overall schematic diagram of an adrenal vein blood collection catheter;

[0020] Figure 2 This is a cross-sectional view of an adrenal vein blood collection catheter;

[0021] The reference numerals in the drawings of the specification include:

[0022] 1. Adjustable bending sheath; 2. Inner catheter; 201. Bending portion; 3. Adjusting assembly; 4. Sleeve portion; 5. Rotating portion; 501. Protrusion; 502. Recess; 6. Sliding portion; 601. Pull knob; 602. Sliding sleeve shaft; 603. Sliding groove; 604. Flange; 605. Pull shaft. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0025] It should also be noted that the directional terms such as front and rear in this embodiment are merely relative concepts or are based on the normal use state of the product, and should not be considered as restrictive.

[0026] To more clearly describe the structure of the embodiments of the present invention, the terms "proximal" and "distal" are defined herein as commonly used in the field of interventional medicine. Specifically, "distal" refers to the end away from the operator during the surgical procedure, while "proximal" refers to the end closer to the operator during the surgical procedure.

[0027] refer to Figure 1 and Figure 2 , an adrenal vein blood collection catheter, an adrenal vein blood collection catheter, includes an adjustable bend sheath 1, an inner catheter 2 and an adjustment component 3, the inner catheter 2 is installed in the adjustable bend sheath 1, and a bending portion 201 is provided at the front end of the inner catheter 2, and the bending portion 201 is bent at a certain arc relative to the inner catheter 2. When the bending portion 201 of the inner catheter 2 is received in the adjustable bend sheath 1, the bending portion 201 is temporarily straightened under the constraint of the front end of the adjustable bend sheath 1. When the bending portion 201 slides out of the adjustable bend sheath 1, it naturally bends in a preset direction, and aligns the bending direction with the blood collection site to complete the blood collection. The setting of the bending portion 201 increases the flexibility of the front end of the blood collection catheter, and can cope with the individualized physiological and anatomical structure of the adrenal vein. The rear end of the inner catheter 2 is set on the adjustment component 3, and the adjustment component 3 includes a sleeve portion 4, a rotating portion 5 and a sliding portion 6.

[0028] The sleeve part 4 is installed at the rear end of the adjustable bend sheath tube 1. The sleeve part 4 includes a cavity that is recessed inward to form an open end. The rear end of the adjustable bend sheath tube 1 is accommodated inside the cavity. The cavity and the adjustable bend sheath tube 1 form an interference fit. The sleeve part 4 is made of elastic rubber. The sleeve part 4 is installed at the rear end of the adjustable sheath tube by sleeve connection. The elastic rubber material constitutes the cavity that can adapt to the size and shape of the rear end of the adjustable bend sheath tube 1, and has stronger adaptability.

[0029] One end of the rotating portion 5 is fixed to the sleeve portion 4, and the end away from the sleeve portion 4 is in a rotational connection with the sliding portion 6. The rotating portion 5 includes a convex portion 501 and a concave portion 502. The convex portion 501 protrudes outward to form a T-shaped cylinder, and the concave portion 502 is recessed to accommodate the convex portion 501. The convex portion 501 is fixedly connected to the sleeve portion 4, and the concave portion 502 is fixedly connected to the sliding portion 6. The rotating portion 5 connects the sleeve portion 4 and the sliding portion 6, enabling the sliding portion 6 to rotate relative to each other. Since the sliding portion 6 is fixedly connected to the inner conduit 2, the inner conduit 2 can also rotate relative to each other.

[0030] The sliding portion 6 is fixedly connected to the inner catheter 2, allowing the inner catheter 2 to slide relative to it. The sliding portion 6 includes a pull button 601 and a sliding sleeve 602. The interior of the sliding sleeve 602 is a chamber for accommodating the inner catheter 2. The pull button 601 is sleeved on the sliding sleeve 602, and the sliding sleeve is provided with a sliding groove 603. The pull button 601 passes through the sliding groove 603 and is connected to the inner catheter 2. The sliding groove 603 can be one or more. Pulling the pull button 601 causes the pull button 601 to slide back and forth relative to the sliding sleeve 602. Since the pull button 601 is fixedly connected to the inner catheter 2, the inner catheter 2 can slide back and forth relative to the adjustable bending sheath 1. Specifically, the inner catheter 2 is provided with a flange 604, which is disposed in the chamber inside the sliding sleeve 602. The pull button 601 is provided with a pull shaft 605 connected to the flange 604.

[0031] The sleeve part 4, the rotating part 5 and the sliding part 6 are all provided with a cavity for accommodating the inner catheter 2, so that the inner catheter 2 passes through the sleeve part 4, the rotating part 5 and the sliding part 6 and enters the sheath. Obviously, the inner catheter 2 serves as a blood collection catheter, and its rear end should be connected to a negative pressure blood collection device.

[0032] The specific implementation process is as follows:

[0033] The present invention uses an inner catheter 2 combined with an adjustable bend sheath 1 to draw blood from the adrenal vein. The inner catheter 2 passes through the interior of the adjustable bend sheath 1, and a bend 201 is provided at its distal end. Before use, the bend 201 is stored in the front end of the adjustable bend sheath 1. When the adjustable bend sheath 1 is bent to align near the adrenal vein blood collection point, the inner catheter 2 is rotated in the sheath by the rotating portion 5 of the adjusting component 3, so that the bend 201 is aligned with the appropriate position, and then the inner catheter 2 is slid forward by the sliding portion 6 to make the bend 201 protrude. Since the bend 201 is a pre-set shape, the inner catheter 2, which loses the constraint of the front end of the adjustable bend sheath 1, can bend toward the target position while protruding. The rotating portion 5 cooperates with the sliding portion 6 to make the inner catheter 2 accurately approach the blood collection point of the adrenal vein, thereby increasing the flexibility of the distal end of the adjustable bend sheath 1, being able to cope with the complex and changeable anatomical structure of the adrenal vein and adapt to the individualized physiological and anatomical structure of the adrenal vein.

[0034] It should be understood that the present invention is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, a detailed description of known methods is omitted. It should be noted that those skilled in the art may make various modifications and improvements without departing from the technical solution of the present invention, and these modifications and improvements should also be considered within the scope of protection of the present invention, and these modifications and improvements will not affect the effectiveness and practicality of the present invention.

[0035] In the present invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with or replace features of other embodiments.

[0036] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations to the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An adrenal vein blood collection catheter, comprising an adjustable curved sheath tube (1), characterized in that: The invention also includes an inner catheter (2) and an adjusting assembly (3), wherein the inner catheter (2) is installed in the adjustable bending sheath tube (1), a bending portion (201) is provided at the front end of the inner catheter (2), and the rear end of the inner catheter (2) is provided on the adjusting assembly (3), and the adjusting assembly (3) includes a sleeve portion (4), a rotating portion (5) and a sliding portion (6), wherein the sleeve portion (4) is installed at the rear end of the adjustable bending sheath tube (1), one end of the rotating portion (5) is fixed on the sleeve portion (4), and the end away from the sleeve portion (4) forms a rotational connection relationship with the sliding portion (6), and the sliding portion (6) is fixedly connected to the inner catheter (2) so that the inner catheter (2) slides relatively.

2. The adrenal vein blood collection catheter according to claim 1, characterized in that: The sleeve portion (4) comprises a cavity that is recessed inwardly to form an open end, wherein the rear end of the adjustable bending sheath tube (1) is accommodated in the cavity, and the cavity and the adjustable bending sheath tube (1) form an interference fit.

3. The adrenal vein blood collection catheter according to claim 2, characterized in that: The sleeve portion (4) is made of elastic rubber.

4. The adrenal vein blood collection catheter according to claim 1, characterized in that: The rotating portion (5) comprises a convex portion (501) and a concave portion (502); the convex portion (501) protrudes outward to form a T-shaped cylinder; the concave portion (502) is recessed to accommodate the convex portion (501); the convex portion (501) is fixedly connected to the sleeve portion (4); and the concave portion (502) is fixedly connected to the sliding portion (6).

5. The adrenal vein blood collection catheter according to claim 1, characterized in that: The sliding portion (6) comprises a pull button (601) and a sliding sleeve shaft (602); the interior of the sliding sleeve shaft (602) is a chamber for accommodating the inner catheter (2); the pull button (601) is sleeved on the sliding sleeve shaft (602); a sliding groove (603) is provided on the sliding sleeve shaft; the pull button (601) passes through the sliding groove (603) and is connected to the inner catheter (2).

6. The adrenal vein blood collection catheter according to claim 5, characterized in that: The inner conduit (2) is provided with a flange (604), and the flange (604) is arranged in a cavity inside the sliding sleeve (602). The pull button (601) is provided with a pull shaft (605) connected to the flange (604).

7. The adrenal vein blood collection catheter according to claim 6, characterized in that: The sliding groove (603) is one or more.

8. The adrenal vein blood collection catheter according to any one of claims 1 to 7, characterized in that: The sleeve portion (4), the rotating portion (5) and the sliding portion (6) are all provided with cavities for accommodating the inner conduit (2).

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