Guide catheter

Abstract

The utility model relates to the technical field of medical instruments, and discloses a guide catheter, which comprises a catheter seat, a guide tube, a guide tube, a guide tube, a guide tube, a guide tube and a guide tube, and is characterized in that one side of the guide tube is provided with a Luer taper; the near-end catheter section is formed by splicing a plurality of length adjusting units, unit screw openings are formed in the two ends of each length adjusting unit, length adjusting unit bodies are made of elastic materials, the unit screw openings are made of rigid materials, the catheter base and the length adjusting units are connected through the catheter base screw openings and the unit screw openings, and every two adjacent length adjusting units are connected through every two adjacent unit screw openings. The length adjusting units are detachably connected, and the length of the near-end catheter section is adjusted by detaching or additionally installing the length adjusting units with different lengths; one end of the far-end catheter section is provided with a far-end catheter screw opening, the other end of the far-end catheter section is provided with a soft TIP, and a developing ring is arranged at the position close to the end. The guide catheter has the advantages of being adjustable in length of the near-end catheter section, stable in connection, not prone to loosening and convenient to disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a guide catheter. Background Art

[0002] During vascular interventional surgery, guide catheters are used to provide support during the procedure, establish channels for other interventional devices, such as microcatheters, balloons, stents, etc., to enter the blood vessels, and assist other devices in entering and exiting the blood vessels. Guide catheters are required in almost all vascular interventional treatment surgeries.

[0003] In actual clinical procedures, the "Tower of Power" technique is often used, which is to place a series of catheters in a coaxial manner to enhance stability and support. This method is very necessary for distal blood vessels. Specifically, for example, a 90cm large guide catheter is used to establish a channel from the body surface to the carotid artery. At this time, a thinner guide catheter is needed to establish a channel in the carotid artery, so a 150cm small guide catheter needs to be inserted into the 90cm large guide catheter. When inserting the 90cm large guide catheter, due to the patient's height and the degree of vascular tortuosity, part of the catheter is still located outside the body surface. At this time, if the location of the lesion target is far away, that is, the sum of the distance between the lesion target and the large guide catheter plus 90cm (the length of the large guide catheter) is greater than 150cm (the length of the small guide catheter), the small guide catheter cannot reach the lesion target. At this time, all instruments need to be removed, a shorter large guide catheter is selected, or a longer small guide catheter is selected, or the operation is forced to be terminated.

[0004] To summarize, since part of the large guide catheter is still outside the body surface during surgery, this part blocks the small guide catheter or other instruments from moving inward. We can perform surgery by replacing it with a shorter large guide catheter, but this requires the large guide catheter to be removed again. This method takes a long time to operate and has high risks. In this regard, if we remove the part of the large guide catheter that is outside the body surface, the small guide catheter or other instruments inside it can continue to move forward to the lesion target or other surgical location. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the utility model provides a guide catheter having the advantages of adjustable proximal catheter section length, stable connection that is not easy to loosen, and easy disassembly. It solves the problem that during surgery, part of the large guide catheter is located outside the body surface, thereby blocking the small guide catheter or other instruments from moving inward, and the replacement of guide catheters of different lengths takes a long time and has high risks.

[0007] (II) Technical solution

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A guide catheter, comprising:

[0010] A catheter seat, one side of which is provided with a Luer connector, and the other side of which is provided with a catheter seat screw for connecting a proximal catheter segment;

[0011] The proximal catheter segment is formed by splicing a plurality of length-adjusting units, each of which is provided with unit screws at both ends, the length-adjusting unit body is made of elastic material, the unit screws are made of rigid material, the catheter seat and the length-adjusting unit are connected via the catheter seat screw and the unit screw, two adjacent length-adjusting units are connected via two adjacent unit screws, the length-adjusting units are detachably connected, and the length of the proximal catheter segment can be adjusted by removing or adding length-adjusting units of different lengths;

[0012] The distal catheter segment is provided with a distal catheter screw port at one end connected to the length adjustment unit, a soft TIP is provided at the other end of the distal catheter segment, and a developing ring is provided at a position close to the end of the distal catheter segment.

[0013] Preferably, the connection between the threaded opening of the catheter seat and the threaded opening of the unit, between the threaded opening of the unit and the threaded opening of the unit, and between the threaded opening of the unit and the threaded opening of the distal catheter is a threaded connection.

[0014] Preferably, the catheter seat screw and the unit screw, the unit screw and the unit screw, and the unit screw and the distal catheter screw are connected by a connecting mechanism, and the connecting mechanism includes two connecting seat screws arranged at both ends, and the two connecting seat screws are respectively threadedly connected to the corresponding unit screw, catheter seat screw or distal catheter screw.

[0015] Preferably, the outer side of the connecting mechanism is wrapped with a freely rotating rotating ring, and the rotating ring is fixed to the connecting mechanism body by a key so as to be rotationally connected. The rotating ring is used to offset external friction, improve the stability of the connection, and avoid loosening of the thread due to friction.

[0016] Preferably, an outer hole is provided on the rotating ring, and an inner hole is provided at a corresponding position on the connecting mechanism body. When the rotating ring is rotated so that the outer hole is aligned with the inner hole, the outer hole and the inner hole are clamped by using a tool, thereby rotating to release the threaded connection of the connecting mechanism, thereby achieving the purpose of quick disassembly or installation of the length adjustment unit.

[0017] Preferably, the two connection seat screw holes on the connection mechanism are rotationally connected via a key, thereby preventing the threads from loosening when the length adjustment unit is bent.

[0018] Preferably, the rotating ring and the connecting seat threaded mouth are both made of rigid materials.

[0019] Preferably, each rotating ring, connecting seat screw, catheter seat screw, unit screw and distal catheter screw are made of metal pipes or braided mesh pipes, and the main body of each length adjustment unit is made of elastic polymer material with sealing effect.

[0020] Preferably, the inner layer of the distal catheter segment body is a PTFE thin-wall lubricating lining, the middle layer of the distal catheter segment body is a braided layer, and the outer layer of the distal catheter segment body is a polymer layer.

[0021] Preferably, a sealing film or a sealing adhesive is provided on the surface of each length adjustment unit.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the utility model provides a guide catheter, which has the following beneficial effects:

[0024] 1. The guide catheter divides the proximal catheter segment into multiple length-adjusting units of different or equal lengths. The proximal catheter segment is located near the catheter seat. During surgery, a portion of the proximal catheter segment is located outside the body. The connection between the length-adjusting units is set to be detachable. When it is found that the total length of the catheter is too long or too short, the length-adjusting units located outside the body can be removed or added, without the need to remove and replace the entire catheter, thereby saving operation time and reducing operation risks.

[0025] 2. The guide catheter is connected by a connecting mechanism between adjacent length-adjusting units. The connecting seat screws with rotational connection are arranged at both ends of the connecting mechanism and are threadedly connected to the length-adjusting units, so that the threads of the length-adjusting units will not loosen when bent, and the connection is more stable.

[0026] 3. The guide catheter wraps a rotating ring for rotation connection on the outside of the connecting mechanism, so that the connecting mechanism is not easy to loosen when subjected to external friction, and the connection is more stable. Then, an outer hole and an inner hole are respectively provided on the rotating ring and the connecting mechanism. When the rotating ring is rotated to align the outer hole with the inner hole, the outer hole and the inner hole are clamped by using a tool, so as to rotate and disengage the threaded connection of the connecting mechanism, thereby achieving the purpose of quick disassembly or installation of a length adjustment unit.

[0027] 4. The guide catheter, by setting the length adjustment unit body to be elastic and the unit screw mouth to be rigid, ensures support and sealing while also achieving length adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the utility model.

[0029] Figure 2 It is a structural schematic diagram of the catheter seat of the first embodiment of the utility model.

[0030] Figure 3 It is an isometric cross-sectional view of the length adjustment unit of the first embodiment of the utility model.

[0031] Figure 4 It is a schematic structural diagram of the distal catheter section of the first embodiment of the utility model.

[0032] Figure 5 It is a schematic diagram of the overall structure of the second embodiment of the utility model.

[0033] Figure 6 It is an isometric cross-sectional view of the length adjustment unit of the second embodiment of the utility model.

[0034] Figure 7 It is an isometric cross-sectional view of the connecting mechanism of the second embodiment of the utility model.

[0035] Figure 8 This is a cross-sectional view of the connecting mechanism of the second embodiment of the utility model when connected.

[0036] Fig. 9 for Figure 8 A partial enlarged view of area A.

[0037] Fig.10 It is an isometric cross-sectional view of the connecting mechanism of the third embodiment of the present utility model.

[0038] Fig.11 It is an isometric cross-sectional view of the connecting mechanism of the fourth embodiment of the present utility model.

[0039] In the figure: 100, catheter seat; 200, proximal catheter segment; 300, distal catheter segment; 400, developing ring; 500, connecting mechanism; 101, catheter seat screw; 210, length adjustment unit; 211, unit screw; 301, distal catheter screw; 510, connecting seat screw; 520, rotating ring; 521, outer hole; 511, inner hole. DETAILED DESCRIPTION

[0040] 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.

[0041] In the description of the present invention, it should be understood that the terms "length", "width", "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 accompanying drawings, and 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, and therefore cannot be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] Embodiment 1:

[0044] This embodiment provides a guide catheter having the following technical features.

[0045] See also Figure 1-4 A guide catheter comprises: a catheter seat 100, one side of which is provided with a Luer connector, and the other side of which is provided with a catheter seat screw 101 for connecting a proximal catheter segment 200; the proximal catheter segment 200 is spliced ​​together by a plurality of length-adjusting units 210 of different or equal lengths, each length-adjusting unit 210 is provided with a unit screw 211 at both ends, the length-adjusting unit 210 body is made of elastic material, the unit screw 211 is made of rigid material, the catheter seat 100 and the length-adjusting unit 210 are threadedly connected through the catheter seat screw 101 and the unit screw 211, and two adjacent length-adjusting units 210 are threadedly connected through two adjacent unit screws 211, and the length of the proximal catheter segment 200 can be adjusted by removing or adding length-adjusting units 210 of different lengths; a distal catheter segment 300, wherein the distal catheter screw 301 is provided at one end of the distal catheter segment 300 connected to the length-adjusting unit 210, and a soft T-type rubber is provided at the end of the other end of the distal catheter segment 300 IP, the distal catheter segment 300 is provided with a developing ring 400 near the end; the connection between the catheter seat screw 101 and the unit screw 211, the unit screw 211 and the unit screw 211, and the unit screw 211 and the distal catheter screw 301 is a threaded connection.

[0046] It is further provided that each rotating ring 520, the connecting seat screw 510, the catheter seat screw 101, the unit screw 211 and the distal catheter screw 301 are made of metal pipes or braided mesh pipes.

[0047] It is further provided that the main body of each length-adjusting unit 210 is made of an elastic polymer material having a sealing effect, such as TPU, PU, ​​Pebax, and PA.

[0048] It is further provided that the inner layer of the main body of the distal catheter segment 300 is a PTFE thin-wall lubricating lining, the middle layer of the main body of the distal catheter segment 300 is a braided layer, and the outer layer of the main body of the distal catheter segment 300 is a polymer layer.

[0049] It is further provided that a sealing film or a sealing adhesive is provided on the surface of each length adjustment unit 210 .

[0050] Embodiment 2:

[0051] This embodiment provides a guide catheter, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0052] See also Figure 5-9 A guide catheter comprises: a catheter seat 100, one side of which is provided with a Luer connector, and the other side of which is provided with a catheter seat screw 101 for connecting a proximal catheter segment 200; the proximal catheter segment 200 is spliced ​​together by a plurality of length adjustment units 210, each of which is provided with a unit screw 211 at both ends, the length adjustment unit 210 body is made of elastic material, the unit screw 211 is made of rigid material, the length adjustment units 210 are detachably connected to each other, and the length of the proximal catheter segment 200 can be adjusted by removing or adding length adjustment units 210 of different lengths; a distal catheter segment 300, the distal catheter screw 301 is provided at one end of the distal catheter segment 300 connected to the length adjustment unit 210, a soft TIP is provided at the end of the other end of the distal catheter segment 300, and a developing ring 400 is provided at a position near the end of the distal catheter segment 300.

[0053] It is further provided that the catheter seat screw 101 and the unit screw 211, the unit screw 211 and the unit screw 211, and the unit screw 211 and the distal catheter screw 301 are connected by a connecting mechanism 500, and the connecting mechanism 500 includes two connecting seat screws 510 arranged at both ends, and the two connecting seat screws 510 are respectively threadedly connected to the corresponding unit screw 211, the catheter seat screw 101 or the distal catheter screw 301.

[0054] Furthermore, the outer side of the connection mechanism 500 is wrapped with a freely rotating rotating ring 520, and the rotating ring 520 is fixed to the main body of the connection mechanism 500 by a key so as to be rotationally connected. The rotating ring 520 is used to offset external friction, improve the stability of the connection, and avoid loosening of the thread due to friction.

[0055] Furthermore, an outer hole 521 is provided on the rotating ring 520, and an inner hole 511 is provided at a corresponding position on the main body of the connecting mechanism 500. When the rotating ring 520 is rotated so that the outer hole 521 is aligned with the inner hole 511, the outer hole 521 and the inner hole 511 are clamped by using a tool, thereby rotating to disengage the threaded connection of the connecting mechanism 500, thereby achieving the purpose of quickly disassembling or adding the length adjustment unit 210.

[0056] It is further provided that the two connection seat screw holes 510 on the connection mechanism 500 are rotationally connected via a key, thereby preventing the screw thread from loosening when the length adjustment unit 210 is bent.

[0057] It is further provided that the rotating ring 520 and the connecting seat threaded opening 510 are both made of rigid materials, such as metal pipes or braided mesh pipes.

[0058] Embodiment three:

[0059] This embodiment provides a guide catheter, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0060] See also Figure 5 and 10A guide catheter comprises: a catheter seat 100, one side of which is provided with a Luer connector, and the other side of which is provided with a catheter seat screw 101 for connecting a proximal catheter segment 200; the proximal catheter segment 200 is spliced ​​together by a plurality of length adjustment units 210, each of which is provided with a unit screw 211 at both ends, the length adjustment unit 210 body is made of elastic material, the unit screw 211 is made of rigid material, the length adjustment units 210 are detachably connected, and the length of the proximal catheter segment 200 can be adjusted by removing or adding length adjustment units 210 of different lengths; a distal catheter segment 300, the distal catheter segment 300 is provided with a distal catheter screw 301 at one end connected to the length adjustment unit 210, a soft TIP is provided at the end of the other end of the distal catheter segment 300, and a developing ring 400 is provided at a position near the end of the distal catheter segment 300; the catheter seat screw 101 and the unit screw 211, the unit screw 211 and the unit screw 211, the unit screw 211 and the unit screw The distal catheter screw threads 301 are connected by a connecting mechanism 500, and the connecting mechanism 500 includes two connecting seat screw threads 510 arranged at both ends, and the two connecting seat screw threads 510 are respectively threadedly connected to the corresponding unit screw thread 211, the catheter seat screw thread 101 or the distal catheter screw thread 301; the outer side of the connecting mechanism 500 is wrapped with a freely rotating rotating ring 520, and the rotating ring 520 and the main body of the connecting mechanism 500 are fixed by a key so as to be rotationally connected. The rotating ring 520 is used to offset external friction, improve the stability of the connection, and avoid loosening of the thread due to friction. An outer hole 521 is arranged on the rotating ring 520, and an inner hole 511 is arranged at a corresponding position on the main body of the connecting mechanism 500. When the rotating ring 520 is rotated to align the outer hole 521 with the inner hole 511, the outer hole 521 and the inner hole 511 are clamped by using a tool, so as to rotate and disengage the threaded connection of the connecting mechanism 500, thereby achieving the purpose of quickly disassembling or adding the length adjustment unit 210.

[0061] Embodiment 4:

[0062] This embodiment provides a guide catheter, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0063] See also Figure 5 and 11A guide catheter comprises: a catheter seat 100, one side of which is provided with a Luer connector, and the other side of which is provided with a catheter seat screw 101 for connecting a proximal catheter segment 200; the proximal catheter segment 200 is formed by splicing a plurality of length-adjusting units 210, each of which is provided with unit screws 211 at both ends, the length-adjusting unit 210 body is made of elastic material, the unit screws 211 are made of rigid material, the length-adjusting units 210 are detachably connected to each other, and the length of the proximal catheter segment 200 can be adjusted by removing or adding length-adjusting units 210 of different lengths; a distal catheter segment 300, the distal catheter segment 300 is connected to the length-adjusting unit 21 0 is provided at one end of the connection, a distal catheter screw mouth 301 is provided at the end of the other end of the distal catheter segment 300, and a soft TIP is provided at the end of the distal catheter segment 300, and a developing ring 400 is provided at a position close to the end; the catheter seat screw mouth 101 and the unit screw mouth 211, the unit screw mouth 211 and the unit screw mouth 211, and the unit screw mouth 211 and the distal catheter screw mouth 301 are connected by a connecting mechanism 500, and the connecting mechanism 500 includes two connecting seat screw mouths 510 arranged at both ends, and the two connecting seat screw mouths 510 are respectively threadedly connected with the corresponding unit screw mouth 211, the catheter seat screw mouth 101 or the distal catheter screw mouth 301.

[0064] In summary, the guide catheter divides the proximal catheter segment 200 into multiple length-adjusting units 210 of different or equal lengths. The proximal catheter segment 200 is located near the catheter seat 100. During surgery, a portion of the proximal catheter segment 200 is located outside the body. The connection between the length-adjusting units 210 is set to be a detachable connection. When it is found that the total length of the catheter is too long or too short, the portion of the length-adjusting unit 210 located outside the body can be removed or added, without the need to remove and replace the entire catheter, thereby saving operation time and reducing operation risks.

[0065] The guide catheter is connected by a connecting mechanism 500 between adjacent length-adjusting units 210. The connecting seat screws 510 with rotational connection are provided at both ends of the connecting mechanism 500 and are threadedly connected to the length-adjusting unit 210, so that the threads of the length-adjusting unit 210 will not loosen when being bent, and the connection is more stable.

[0066] The guide catheter wraps a rotating ring 520 for rotational connection on the outside of the connecting mechanism 500, so that the connecting mechanism 500 is not easy to loosen when subjected to external friction, and the connection is more stable. Then, an outer hole 521 and an inner hole 511 are respectively provided on the rotating ring 520 and the connecting mechanism 500. When the rotating ring 520 is rotated so that the outer hole 521 is aligned with the inner hole 511, the outer hole 521 and the inner hole 511 are clamped by using a tool, so as to rotate and disengage the threaded connection of the connecting mechanism 500, thereby achieving the purpose of quickly disassembling or adding the length adjustment unit 210.

[0067] The guide catheter ensures support and sealing properties while achieving length adjustment by setting the length adjustment unit 210 body to be elastic and the unit screw thread 211 to be rigid.

[0068] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0069] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A guide catheter, characterized in that: include: A catheter seat (100) having a Luer connector on one side and a catheter seat screw (101) for connecting to a proximal catheter section (200) on the other side; The proximal catheter section (200) is formed by splicing a plurality of length adjustment units (210), each length adjustment unit (210) is provided with a unit screw thread (211) at both ends, the length adjustment unit (210) is made of elastic material, the unit screw thread (211) is made of rigid material, the catheter seat (100) and the length adjustment unit (210) are connected via the catheter seat screw thread (101) and the unit screw thread (211), two adjacent length adjustment units (210) are connected via two adjacent unit screw threads (211), the length adjustment units (210) are detachably connected, and the length of the proximal catheter section (200) can be adjusted by removing or installing length adjustment units (210) of different lengths; The distal catheter segment (300) has a distal catheter screw port (301) at one end connected to the length adjustment unit (210), and a developing ring (400) and a soft TIP at the other end.

2. A guide catheter according to claim 1, characterized in that: The connection between the catheter seat screw (101) and the unit screw (211), the unit screw (211) and the unit screw (211), and the unit screw (211) and the distal catheter screw (301) is a threaded connection.

3. A guide catheter according to claim 1, characterized in that: The catheter seat screw (101) and the unit screw (211), the unit screw (211) and the unit screw (211), and the unit screw (211) and the distal catheter screw (301) are connected via a connecting mechanism (500), and the connecting mechanism (500) comprises two connecting seat screws (510) arranged at two ends, and the two connecting seat screws (510) are respectively threadedly connected to the corresponding unit screw (211), the catheter seat screw (101) or the distal catheter screw (301).

4. A guide catheter according to claim 3, characterized in that: The outer side of the connection mechanism (500) is wrapped with a freely rotatable rotating ring (520), and the rotating ring (520) and the main body of the connection mechanism (500) are fixed by a key so as to be rotatably connected, and the rotating ring (520) is used to offset external friction.

5. A guide catheter according to claim 4, characterized in that: The rotating ring (520) is provided with an outer hole (521), and the connecting mechanism (500) body is provided with an inner hole (511) at a corresponding position. When the rotating ring (520) is rotated to align the outer hole (521) with the inner hole (511), the outer hole (521) and the inner hole (511) are clamped by using a tool.

6. A guide catheter according to claim 5, characterized in that: The two connection seat screw holes (510) on the connection mechanism (500) are rotationally connected via a key.

7. A guide catheter according to claim 6, characterized in that: The rotating ring (520) and the connecting seat threaded mouth (510) are both made of rigid materials.

8. A guide catheter according to claim 7, characterized in that: Each rotating ring (520), the connecting seat screw (510), the catheter seat screw (101), the unit screw (211) and the distal catheter screw (301) are made of metal pipes or braided mesh pipes, and the main body of each length adjustment unit (210) is made of elastic polymer material with sealing effect.

9. The guide catheter according to claim 1, characterized in that: The inner layer of the main body of the distal catheter section (300) is a PTFE thin-wall lubricating lining, the middle layer of the main body of the distal catheter section (300) is a braided layer, and the outer layer of the main body of the distal catheter section (300) is a polymer layer.

10. The guide catheter according to claim 1, characterized in that: A sealing film or sealing glue is provided on the surface of each length adjustment unit (210).

Images