Multi-head catheter

Abstract

The invention relates to the technical field of medical instruments, and provides a multi-head catheter. Comprising a first conduit, a second conduit and a third conduit, a first opening is formed in the first catheter close to the head end, and a second opening is formed in the first catheter close to the tail end; the head end of the first catheter is higher than the head end of the third catheter, and the first opening is lower than the head end of the third catheter; the second guide pipe is provided with a first semicircular pipe section, a second semicircular pipe section and a circular pipe section, the first semicircular pipe section and the second semicircular pipe section are oppositely arranged, the circular pipe section is arranged below the first semicircular pipe section and the second semicircular pipe section, the first semicircular pipe section and the second semicircular pipe section are completely located in the first guide pipe, and the circular pipe section is partially located in the first guide pipe. The round pipe section extends out of the first guide pipe through the second opening; and a third opening is formed in the second semicircular pipe section. The multi-head catheter has the advantages that the multi-head catheter does not need to be pulled out, adrenal vein multi-point blood sampling can be achieved, the aldosterone level can be detected more accurately, and clinical operation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a multi-head catheter. Background Art

[0002] Adrenal venous blood sampling is an invasive test in which a catheter is inserted into the adrenal vein to collect a blood sample for the measurement of aldosterone. It is used to differentiate between tumors and adrenal hyperplasia.

[0003] When doing multiple-point blood sampling from the adrenal vein, the catheter needs to be pulled out and back, which reduces the efficiency of clinical operation.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a multi-head catheter to solve the technical problems existing in the prior art.

[0006] To achieve the above object, the technical solution adopted by the present invention is: 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 is provided near the end end of the first catheter; the head end of the first catheter is higher than the head end of the third catheter, and the first opening is lower than the head end of the third catheter;

[0008] The second conduit is provided with a first semicircular tube segment, a second semicircular tube segment and a circular tube segment, the first semicircular tube segment is arranged opposite to 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 conduit, the circular tube segment is partially located in the first conduit, and the circular tube segment extends out of the first conduit 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 is completely fitted with the inner tube surface of the first conduit, and the outer tube surface of the second semicircular tube segment can move up and down along the inner tube surface of the first conduit.

[0010] In an optional embodiment, the diameter of the first semicircular tube segment is smaller than the diameter of the second semicircular tube segment; 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 provided on the second opening, and the rubber ring is in friction contact with the circular tube segment.

[0013] In an optional embodiment, a support limiter is provided in the first conduit, and the support limiter includes a cross bracket, a first limiter rod, a second limiter rod and a semicircular limiter rod; the lower surface of the cross bracket is connected to one end of the first limiter rod and the second limiter rod, and the two ends of the semicircular limiter rod are respectively connected to the other end of the first limiter rod and the second limiter 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 fits with the side of the first limiting rod; the second limiting surface of the second semicircular tube segment fits with the side of the second limiting rod; the third limiting surface of the second semicircular tube segment can fit with the upper surface of the semicircular limiting rod.

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

[0017] In an optional embodiment, the outer wall of the first conduit is in contact with the outer wall of the third conduit.

[0018] In an optional embodiment, when the first opening does not overlap with the third opening, the first flow channel is opened and the second flow channel is closed; when the first opening partially or completely overlaps with the third opening, the first flow channel is closed and the second flow channel is opened.

[0019] The beneficial effect of the present invention is that: by using a multi-head catheter having a first catheter, a second catheter and a third catheter, it is not necessary to pull out the multi-head catheter, and blood sampling at multiple points of the adrenal vein can be achieved, thereby improving clinical operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0022] Figure 2A schematic diagram of a local structure of a support stopper provided in an embodiment of the present invention located inside a first conduit Figure 1 .

[0023] Figure 3 A schematic diagram of a local structure of a support stopper provided in an embodiment of the present invention located inside a first conduit Figure 2 .

[0024] Figure 4 A schematic diagram of a partial structure of a second conduit provided in one embodiment of the present invention Figure 1 .

[0025] Figure 5 A schematic diagram of a partial structure of a second conduit provided in one embodiment of the present invention Figure 2 .

[0026] Figure 6 A schematic structural diagram of a second conduit provided in an embodiment of the present invention being located in a supporting and limiting member within a first conduit.

[0027] Figure 7 A schematic diagram of a first flow channel being connected according to an embodiment of the present invention.

[0028] Figure 8 A schematic diagram of the conduction of the second flow channel provided by an embodiment of the present invention.

[0029] Among them, the accompanying drawings are marked as follows:

[0030] 1-first conduit, 11-first opening, 12-second opening;

[0031] 2-second conduit, 21-circular tube section, 22-first semicircular tube section, 23-second semicircular tube section, 24-second limiting surface, 25-first limiting surface, 26-third limiting surface, 27-third opening; 3-third conduit;

[0032] 3-third conduit; 4-first negative pressure device; 5-second negative pressure device, 6-third negative pressure device;

[0033] 7-support limiter, 71-cross bracket, 72-first limit rod, 73-second limit rod, 74-semicircular limit rod;

[0034] 8 - first flow channel; 9 - second flow channel. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 used to limit the present invention.

[0036] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly located on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on the present technical solution. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, and "several" means any number including one, unless otherwise clearly and specifically defined.

[0037] Please see attached Figure 1-8 The purpose of this embodiment is to provide a multi-head catheter, including: a first catheter 1, a second catheter 2 and a third catheter 3. The first catheter 1 is provided with a first opening 11 near the head end, and a second opening 12 near the end of the first catheter 1; the head end of the first catheter 1 is higher than the head end of the third catheter 3, and the first opening 11 is lower than the head end of the third catheter 3; the second catheter 2 is provided with a first semicircular tube segment 22, a second semicircular tube segment 23 and a round tube segment 21, the first semicircular tube segment 22 and the second semicircular tube segment 23 are arranged opposite to each other, the round tube segment 21 is arranged below the first semicircular tube segment 22 and the second semicircular tube segment 23, and the first semicircular tube segment 22 is provided below the second semicircular tube segment 23. 22. The second semicircular tube segment 23 is completely located in the first catheter 1, and the circular tube segment 21 is partially located in the first catheter 1, and the circular tube segment 21 extends out of the first catheter 1 through the second opening 12; the second semicircular tube segment 23 is provided with a third opening 27; the arc-shaped outer tube surface of the second semicircular tube segment 23 and the inner tube surface of the first catheter 1 are completely in contact with the blood, so that the blood cannot enter between the arc-shaped outer tube surface of the second semicircular tube segment 23 and the inner tube surface of the first catheter 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 catheter 1. It is worth mentioning that the outer wall of the first catheter 1 is in contact with the outer wall of the third catheter 3, which is convenient for use.

[0038] In this embodiment, the diameter of the first semicircular tube segment 22 is smaller than the diameter of the second semicircular tube segment 23, and the first flow channel 8 can be formed between the first semicircular tube segment 22 and the first conduit 1; the diameter of the first semicircular tube segment 22 is equal to the diameter of the circular tube segment 21. The center of the first opening 11 and the center of the second opening 12 are located 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 is in frictional contact with the circular tube segment 21, which can ensure sealing and realize the movement of the circular tube segment 21.

[0039] Specifically, a support and limit member 7 is provided in the first conduit 1, and the support and limit member 7 includes a cross bracket 71, a first limit rod 72, a second limit rod 73 and a semicircular limit rod 74; the lower surface of the cross bracket 71 is connected to one end of the first limit rod 72 and the second limit rod 73, and the two ends of the semicircular limit rod 74 are respectively connected to the other ends of the first limit rod 72 and the second limit rod 73. The lengths of the first limit rod 72 and the second limit rod 73 are equal; and the lengths of the first limit rod 72 and the second limit rod 73 are greater than the lengths of the first semicircular tube segment 22 and the second semicircular tube segment 23. The first limit surface 25 of the second semicircular tube segment 23 is in contact with the side surface of the first limit rod 72; the second limit surface 24 of the second semicircular tube segment 23 is in contact with the side surface of the second limit rod 73; and the third limit surface 26 of the second semicircular tube segment 23 can be in contact with the upper surface of the semicircular limit rod 74. The second semicircular tube section 23 can move up and down in contact with the inner tube surface of the first conduit 1 while the support stopper 7 is in contact with the inner tube surface of the first conduit 1 without excessive movement or transitional 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; the end of the third catheter 3 is connected to the third negative pressure device 6 to provide power and storage for blood collection.

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

[0042] Specifically, a multi-head catheter is inserted into the renal vein, the head end of the first catheter 1 is located at the proximal end of the adrenal vein, the head end of the third catheter 3 is located in the adrenal vein, and the first opening 11 of the first catheter 1 is located at the distal end of the renal vein; then the first catheter 1, the second catheter 2 and the third catheter 3 are connected to the first negative pressure device 4, the second negative pressure device 5 and the third negative pressure device 6 respectively. The first negative pressure device 4 and the third negative pressure device 6 are opened synchronously, the first catheter 1 collects blood from the proximal end of the adrenal vein, and the blood enters the first negative pressure device 4 through the first flow channel 8, and the third catheter 3 collects blood from the renal vein (located between the above-mentioned proximal end and distal end), and the 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 tube surface of the second semicircular tube segment 23 is completely in contact with the inner tube 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 (will not enter between the arc-shaped outer tube surface of the second semicircular tube segment 23 and the inner tube surface of the first catheter 1). After collecting blood from the above two places, the corresponding negative pressure device is closed; then the circular tube segment 21 of the second catheter 2 is pulled downward to make the first opening 11 partially overlap or completely overlap with the third opening 27, and the two openings are used to collect blood from the distal end of the renal vein, and the 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 collected has a separate flow channel, ensuring the accuracy of blood collection. At the same time, it is possible to achieve multi-point blood collection from the adrenal vein without pulling out the multi-head catheter, improving clinical operation efficiency.

[0043] The above are only 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 in the protection scope of the present invention.

Claims

1. A multi-head catheter, characterized in that: include: A first conduit (1), a second conduit (2) and a third conduit (3); The first conduit (1) is provided with a first opening (11) near the head end, and the first conduit (1) is provided with a second opening (12) near the tail end; the head end of the first conduit (1) is located higher than the head end of the third conduit (3), and the first opening (11) is located lower than the head end of the third conduit (3); The second conduit (2) is provided with a first semicircular tube segment (22), a second semicircular tube segment (23) and a circular tube segment (21); the first semicircular tube segment (22) and the second semicircular tube segment (23) are arranged opposite to each other; the circular tube segment (21) is arranged below the first semicircular tube segment (22) and the second semicircular tube segment (23); the first semicircular tube segment (22) and the second semicircular tube segment (23) are completely located in the first conduit (1); the circular tube segment (21) is partially located in 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).

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

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

4. The multi-head catheter according to 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 according to claim 1, characterized in that: A support and limit member (7) is arranged inside the first conduit (1), and the support and limit member (7) comprises a cross bracket (71), a first limit rod (72), a second limit rod (73) and a semicircular limit rod (74); the lower surface of the cross bracket (71) is connected to one end of the first limit rod (72) and the second limit rod (73), and the two ends of the semicircular limit rod (74) are respectively connected to the other ends of the first limit rod (72) and the second limit rod (73).

6. The multi-head catheter according to claim 5, characterized in that: The first limiting rod (72) and the second limiting rod (73) are of equal length; and the length of the first limiting rod (72) and the second limiting rod (73) is greater than the length of the first semicircular tube section (22) and the second semicircular tube section (23).

7. The multi-head catheter according to claim 5, characterized in that: The first limiting surface (25) of the second semicircular tube segment (23) fits with the side surface of the first limiting rod (72); the second limiting surface (24) of the second semicircular tube segment (23) fits with the side surface of the second limiting rod (73); and the third limiting surface (26) of the second semicircular tube segment (23) can fit with the upper surface of the semicircular limiting rod (74).

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

9. The multi-head catheter according to claim 5, characterized in that: The outer wall of the first conduit (1) is in contact with the outer wall of the third conduit (3).

10. The multi-head catheter according to claim 5, characterized in that: When the first opening (11) and the third opening (27) do not overlap, 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 overlap or completely overlap, the first flow channel (8) is closed and the second flow channel (9) is opened.

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