A multi-head catheter

Abstract

The present application relates to the technical field of medical devices, and provides a multi-head catheter, which comprises a first catheter, a second catheter and a third catheter; the first catheter is provided with a first opening near the head end and a second opening near the tail end; the head end of the first catheter is higher than the head end of the third catheter, and the position of the first opening is lower than the head end of the third catheter; the second catheter is provided with a first semicircular tube segment, a second semicircular tube segment and a circular tube segment; the first semicircular tube segment is oppositely arranged with the second semicircular tube segment, the circular tube segment is arranged below the first semicircular tube segment and the second semicircular tube segment, the first semicircular tube segment and the second semicircular tube segment are completely located in the first catheter, the circular tube segment is partially located in the first catheter, and the circular tube segment extends out of the first catheter through the second opening; and the second semicircular tube segment is provided with a third opening. The beneficial effect is that the multi-head catheter does not need to be pulled out, and multi-point blood sampling of adrenal vein can be realized, so that the aldosterone level can be more accurately detected, and the clinical operation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a multi-head catheter. BACKGROUND

[0002] Adrenal vein blood sampling is a kind of invasive examination for collecting blood samples from adrenal vein to measure aldosterone by catheter insertion, which is used for differential diagnosis of tumors and adrenal hyperplasia.

[0003] When multi-point blood sampling of adrenal vein is performed, the catheter needs to be pulled out and inserted repeatedly, which is low in clinical operation efficiency.

[0004] In view of this, the present application is proposed. SUMMARY

[0005] The present application aims to provide a multi-head catheter to solve the technical problems in the prior art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows: a multi-head catheter comprising: a first catheter, a second catheter and a third catheter.

[0007] The first catheter is provided with a first opening near the head end and a second opening near the tail end; the head end of the first catheter is higher than the head end of the third catheter, and the position of the first opening is lower than the head end of the third catheter.

[0008] The second catheter is provided with a first semicircular tube segment, a second semicircular tube segment and a circular tube segment; the first semicircular tube segment is oppositely arranged with the second semicircular tube segment, and the circular tube segment is arranged along the lower side of the first semicircular tube segment and the second semicircular tube segment; the first semicircular tube segment and the second semicircular tube segment are completely located in the first catheter, and the circular tube segment is partially located in the first catheter, and the circular tube segment extends out of the first catheter through the second opening.

[0009] The second semicircular tube segment is provided with a third opening; the outer tube surface of the second semicircular tube segment completely matches the inner tube surface of the first catheter, and the outer tube surface of the second semicircular tube segment can move up and down along the inner tube surface of the first catheter.

[0010] In an optional embodiment, the diameter of the first semicircular tube segment is smaller than the diameter of the second semicircular tube segment; and the diameter of the first semicircular tube segment is equal to the diameter of the circular tube segment.

[0011] In an optional embodiment, the center of the first opening and the center of the second opening are located on the same straight line; and the size of the third opening is equal to the size of the first opening.

[0012] In an optional embodiment, a rubber ring is arranged on the second opening, and the rubber ring is in frictional contact with the circular tube segment.

[0013] In an optional embodiment, a support and limiting component is provided inside the first conduit. The support and limiting component includes a cross bracket, a first limiting rod, a second limiting rod, and a semi-circular limiting rod. The lower surface of the cross bracket is connected to one end of the first limiting rod and the second limiting rod, and the two ends of the semi-circular limiting rod are respectively connected to the other ends of the first limiting rod and the second limiting rod.

[0014] In an optional embodiment, the lengths of the first limiting rod and the second limiting rod are equal; and the lengths of the first limiting rod and the second limiting rod are greater than the lengths of the first semicircular tube segment and the second semicircular tube segment.

[0015] In an optional embodiment, the first limiting surface of the second semicircular tube segment is in contact with the side of the first limiting rod; the second limiting surface of the second semicircular tube segment is in contact with the side of the second limiting rod; and the third limiting surface of the second semicircular tube segment is in contact with the upper surface of the semicircular limiting rod.

[0016] In an optional embodiment, the end of the first catheter is connected to a first negative pressure device; the end of the second catheter is connected to a second negative pressure device; and the end of the third catheter is connected to a third negative pressure device.

[0017] In an optional embodiment, the outer wall of the first catheter is fitted to the outer wall of the third catheter.

[0018] In an optional embodiment, when the first opening and the third opening do not coincide, the first flow channel is open and the second flow channel is closed; when the first opening and the third opening partially or completely coincide, the first flow channel is closed and the second flow channel is open.

[0019] The beneficial effects of this invention are as follows: by using a multi-headed catheter with a first catheter, a second catheter, and a third catheter, it is possible to achieve multi-point blood collection from the adrenal vein without having to remove the multi-headed catheter, thus improving the efficiency of clinical operation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of a multi-head catheter provided in an embodiment of the present invention.

[0022] Figure 2A schematic diagram of a partial structure of the support and limiting member located inside the first conduit according to an embodiment of the present invention. Figure One .

[0023] Figure 3 A schematic diagram of a partial structure of the support and limiting member located inside the first conduit according to an embodiment of the present invention. Figure Two .

[0024] Figure 4 A partial structural diagram of the second catheter provided in an embodiment of the present invention. Figure One .

[0025] Figure 5 A partial structural diagram of the second catheter provided in an embodiment of the present invention. Figure Two .

[0026] Figure 6 This is a schematic diagram of the structure of the second catheter located in the support and limiting member inside the first catheter, according to an embodiment of the present invention.

[0027] Figure 7 This is a schematic diagram showing the first flow channel being activated according to an embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram showing the conduction of the second flow channel according to an embodiment of the present invention.

[0029] The attached figures are labeled as follows:

[0030] 1-First catheter, 11-First opening, 12-Second opening;

[0031] 2-Second conduit; 21-Circular tube segment; 22-First semi-circular tube segment; 23-Second semi-circular tube segment; 24-Second limiting surface; 25-First limiting surface; 26-Third limiting surface; 27-Third opening; 3-Third conduit;

[0032] 3-Third catheter; 4-First negative pressure device; 5-Second negative pressure device; 6-Third negative pressure device;

[0033] 7-Supporting and limiting component, 71-Cross bracket, 72-First limiting rod, 73-Second limiting rod, 74-Semi-circular limiting rod;

[0034] 8 - First-class channel; 9 - Second-class channel. Detailed Implementation

[0035] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, 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.

[0036] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "Multiple" means two or more, and "several" means any number including one, unless otherwise explicitly specified.

[0037] Please see the appendix Figures 1-8 The purpose of this embodiment is to provide a multi-headed catheter, including: a first catheter 1, a second catheter 2, and a third catheter 3. The first catheter 1 has a first opening 11 near its tip and a second opening 12 near its end. The tip of the first catheter 1 is higher than the tip of the third catheter 3, and the first opening 11 is lower than the tip of the third catheter 3. The second catheter 2 has a first semi-circular tube segment 22, a second semi-circular tube segment 23, and a circular tube segment 21. The first semi-circular tube segment 22 and the second semi-circular tube segment 23 are arranged opposite each other, and the circular tube segment 21 is arranged below the first semi-circular tube segment 22 and the second semi-circular tube segment 23. 22. The second semicircular tube segment 23 is completely located inside the first conduit 1, and the circular tube segment 21 is partially located inside the first conduit 1, with the circular tube segment 21 extending out of the first conduit 1 through the second opening 12. A third opening 27 is provided on the second semicircular tube segment 23. The arc-shaped outer tube surface of the second semicircular tube segment 23 is completely in contact with the inner tube surface of the first conduit 1, preventing blood from entering between the arc-shaped outer tube surface of the second semicircular tube segment 23 and the inner tube surface of the first conduit 1. Furthermore, the outer tube surface of the second semicircular tube segment 23 can move up and down along the inner tube surface of the first conduit 1. It is worth noting that the outer wall of the first conduit 1 is in contact with the outer wall of the third conduit 3, facilitating use.

[0038] In this embodiment, the diameter of the first semicircular pipe segment 22 is smaller than the diameter of the second semicircular pipe segment 23, thus forming a first flow channel 8 between the first semicircular pipe segment 22 and the first conduit 1; the diameter of the first semicircular pipe segment 22 is equal to the diameter of the circular pipe segment 21. The center of the first opening 11 and the center of the second opening 12 are on the same straight line; the size of the third opening 27 is equal to the size of the first opening 11. It should be noted that a rubber ring is provided on the second opening 12, and the rubber ring makes frictional contact with the circular pipe segment 21, which can both ensure sealing and allow the circular pipe segment 21 to move.

[0039] Specifically, a support and limiting member 7 is provided inside the first conduit 1. The support and limiting member 7 includes a cross bracket 71, a first limiting rod 72, a second limiting rod 73, and a semi-circular limiting rod 74. The lower surface of the cross bracket 71 is connected to one end of the first limiting rod 72 and the second limiting rod 73, and the two ends of the semi-circular limiting rod 74 are respectively connected to the other ends of the first limiting rod 72 and the second limiting rod 73. The lengths of the first limiting rod 72 and the second limiting rod 73 are equal, and the lengths of the first limiting rod 72 and the second limiting rod 73 are greater than the lengths of the first semi-circular tube segment 22 and the second semi-circular tube segment 23. The first limiting surface 25 of the second semi-circular tube segment 23 is in contact with the side of the first limiting rod 72; the second limiting surface 24 of the second semi-circular tube segment 23 is in contact with the side of the second limiting rod 73; and the third limiting surface 26 of the second semi-circular tube segment 23 can be in contact with the upper surface of the semi-circular limiting rod 74. This allows the second semi-circular pipe section 23 to move up and down in contact with the inner surface of the first conduit 1, without excessive movement or deviation.

[0040] In addition, the end of the first catheter 1 is connected to the first negative pressure device 4; the end of the second catheter 2 is connected to the second negative pressure device 5; and the end of the third catheter 3 is connected to the third negative pressure device 6, providing power and storage for blood collection.

[0041] It should be noted that when the first opening 11 and the third opening 27 do not coincide, the first flow channel 8 is open and the second flow channel 9 is closed; when the first opening 11 and the third opening 27 partially or completely coincide, the first flow channel 8 is closed and the second flow channel 9 is open.

[0042] Specifically, a multi-headed catheter is inserted into the renal vein, with the tip of the first catheter 1 located proximally to the adrenal vein and the tip of the third catheter 3 located within the adrenal vein. The first opening 11 of the first catheter 1 is located distally to the renal vein. Then, the first catheter 1, the second catheter 2, and the third catheter 3 are respectively connected to the first negative pressure device 4, the second negative pressure device 5, and the third negative pressure device 6. Simultaneously activate the first negative pressure device 4 and the third negative pressure device 6. The first catheter 1 collects blood from the proximal end of the adrenal vein. This blood enters the first negative pressure device 4 through the first flow channel 8. The third catheter 3 collects blood from the renal vein (located between the proximal and distal ends). This blood enters the third negative pressure device 5. At this time, the first opening 11 and the third opening 27 do not overlap, and the outer surface of the second semicircular tube segment 23 is completely in contact with the inner surface of the first catheter 1. The blood collected by the first catheter 1 at the distal end will not enter the second catheter 2 (it will not enter between the arc-shaped outer surface of the second semicircular tube segment 23 and the inner surface of the first catheter 1). After collecting blood from the above two locations, close the corresponding negative pressure device. Then pull down the circular tube segment 21 of the second catheter 2 so that the first opening 11 and the third opening 27 partially or completely overlap. Use the two openings to collect blood from the distal end of the renal vein. This blood enters the second negative pressure device 5 through the second flow channel 9. The above blood collection processes do not interfere with each other, and each blood sample has its own independent flow channel, ensuring accuracy. Furthermore, multiple adrenal vein blood collection can be achieved without removing the multi-point catheter, improving clinical efficiency.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-head catheter, characterized in that, include: First catheter (1), second catheter (2) and third catheter (3); The first conduit (1) has a first opening (11) near its head end and a second opening (12) near its tail end; the head end of the first conduit (1) is higher than the head end of the third conduit (3), and the first opening (11) is lower than the head end of the third conduit (3). The second conduit (2) is provided with a first semi-circular tube segment (22), a second semi-circular tube segment (23) and a circular tube segment (21). The first semi-circular tube segment (22) and the second semi-circular tube segment (23) are arranged opposite to each other. The circular tube segment (21) is arranged below the first semi-circular tube segment (22) and the second semi-circular tube segment (23). The first semi-circular tube segment (22) and the second semi-circular tube segment (23) are completely located inside the first conduit (1). The circular tube segment (21) is partially located inside the first conduit (1), and the circular tube segment (21) extends out of the first conduit (1) through the second opening (12). The second semicircular tube segment (23) is provided with a third opening (27); the outer tube surface of the second semicircular tube segment (23) is completely in contact with the inner tube surface of the first conduit (1), and the outer tube surface of the second semicircular tube segment (23) can move up and down along the inner tube surface of the first conduit (1); The first conduit (1) is provided with a support limiting member (7), which includes a cross bracket (71), a first limiting rod (72), a second limiting rod (73), and a semi-circular limiting rod (74). The lower surface of the cross bracket (71) is connected to one end of the first limiting rod (72) and the second limiting rod (73), and the two ends of the semi-circular limiting rod (74) are respectively connected to the other ends of the first limiting rod (72) and the second limiting rod (73). The first limiting surface (25) of the second semi-circular tube segment (23) is in contact with the side of the first limiting rod (72); the second limiting surface (24) of the second semi-circular tube segment (23) is in contact with the side of the second limiting rod (73); the third limiting surface (26) of the second semi-circular tube segment (23) is in contact with the upper surface of the semi-circular limiting rod (74); When the first opening (11) does not coincide with the third opening (27), the first flow channel (8) is opened and the second flow channel (9) is closed; when the first opening (11) and the third opening (27) partially or completely coincide, the first flow channel (8) is closed and the second flow channel (9) is opened.

2. The multi-head catheter as described in claim 1, characterized in that, The diameter of the first semicircular pipe segment (22) is smaller than the diameter of the second semicircular pipe segment (23); the diameter of the first semicircular pipe segment (22) is equal to the diameter of the circular pipe segment (21).

3. The multi-head catheter as described in claim 1, characterized in that, The center of the first opening (11) and the center of the second opening (12) are on the same straight line; the size of the third opening (27) is equal to the size of the first opening (11).

4. The multi-head catheter as described in claim 1, characterized in that, A rubber ring is provided on the second opening (12), and the rubber ring is in frictional contact with the circular tube section (21).

5. The multi-head catheter as described in claim 1, characterized in that, The lengths of the first limiting rod (72) and the second limiting rod (73) are equal; and the lengths of the first limiting rod (72) and the second limiting rod (73) are greater than the lengths of the first semicircular pipe segment (22) and the second semicircular pipe segment (23).

6. The multi-head catheter as described in claim 1, characterized in that, The end of the first conduit (1) is connected to the first negative pressure device (4); the end of the second conduit (2) is connected to the second negative pressure device (5); and the end of the third conduit (3) is connected to the third negative pressure device (6).

7. The multi-head catheter as described in claim 1, characterized in that, The outer wall of the first catheter (1) is in contact with the outer wall of the third catheter (3).

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