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The reunion catheter simplifies the insertion of the bottom guide wire into the top guide core by forming a truncated cone structure, addressing the inefficiencies in existing treatments for arteriosclerosis obliterans.
Patent Information
- Application Number
- CN202322582817.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-22
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-09-22
AI Technical Summary
Existing treatments for arteriosclerosis obliterans face difficulties in inserting the bottom guide wire into the top guide core due to the small caliber, consuming significant time and energy.
A reunion catheter with a guide core movably engaged inside a catheter body, featuring elastic strips and a limiting ring, allows for the formation of a truncated cone structure when the fixed disk and elastic sheet are moved out, facilitating easy insertion of the bottom guide wire into the top guide core.
Enhances the docking efficiency between the bottom and top guide cores by simplifying the insertion process, reducing time and energy consumption.
Smart Images
Figure CN222238516U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical instruments, and in particular relates to a catheter. Background Art
[0002] In the treatment of arteriosclerosis obliterans, a converging catheter is usually used. The converging catheter is divided into three parts: the catheter, the guide core and the guide wire. The catheter is used for the external structure of the entire converging catheter. When in use, it needs to be inserted into the blood vessel to prepare for the entry of the guide wire and the guide core. The guide core is inserted into the catheter, and the position of the guide core is limited by the clamping structure on the outside of the catheter. The outlet of the guide core is longer than the outlet of the catheter. The guide wire can pass through the guide core. When clearing the hardened material block in the blood vessel, the hardened material block is initially cleared through the guide wire to form a guide wire. The wire channel, the guide wire can pass through the hardened material block, and finally dredge the hardened material block in the blood vessel by using two sets of catheters, guide cores, and guide wires. The catheter guide core in one set is inserted into the blood vessel from bottom to top, and then the guide wire in this set is inserted into the catheter guide core of this set. This set of guide wires dredges the hardened material block at the bottom of the blood vessel, and then the catheter guide core in the other set is inserted into the blood vessel from the top of the blood vessel from top to bottom, and then the guide wire of this set is inserted into the catheter guide core of this set. This set of guide wires dredges the hardened material block at the top of the blood vessel, and finally the guide wire at the top is taken out. The process mainly involves inserting the bottom guide wire into the top guide core to achieve docking, and then finally dredges the hardened material blocks at the top and bottom of the blood vessel.
[0003] In the existing treatment of arteriosclerosis obliterans, two sets of catheters, guide cores and guide wires are usually used to clear the hardened material blocks at the top and bottom of the blood vessels respectively. After the hardened material blocks at the top and bottom are cleared, the top guide wire is taken out, and then the bottom guide wire is inserted into the top guide core from bottom to top. However, due to the small caliber of the guide core, it is difficult to insert the bottom guide wire into the top guide core, which consumes a lot of time and energy.
[0004] Therefore, a convergence catheter is needed to solve the problem in the prior art that it is difficult to operate when the bottom guide wire is inserted into the top guide core, and it consumes a lot of time and energy. Utility Model Content
[0005] The purpose of the utility model is to provide a reunion catheter to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a reunion catheter, comprising a catheter body, a guide core movably engaged inside the catheter body, a fixed disk fixed at the guide core port, four circumferentially distributed elastic sheets fixed to the outer wall of the fixed disk, a connecting film fixed between two adjacent elastic sheets close to each other on one side, and a limiting component is arranged at one end of the catheter body and the guide core.
[0007] It should be noted in the solution that the limiting assembly includes a plurality of elastic strips, the elastic strips are fixed to one end of the outer wall at the inlet of the guide core, and the elastic strips are distributed in a circular pattern.
[0008] It is further worth noting that the elastic strip is a C-shaped structure, and a limiting ring is fixed on the outer wall of the inlet of the catheter body, and the limiting ring is engaged with the elastic strip.
[0009] It should be further explained that the elastic strip is connected to the limiting strip near a side surface of the limiting ring, and the limiting strip is in contact with a side surface of an outer wall of the limiting ring near a side surface of the limiting ring.
[0010] As a preferred embodiment, a lining is provided on the inner wall at the inlet of the catheter body.
[0011] As a preferred embodiment, two symmetrically distributed locking blocks are fixed to the bottom of the outer side wall at the guide core inlet.
[0012] As a preferred implementation, the engaging block is a rectangular block.
[0013] As a preferred embodiment, two engaging grooves engaging with the engaging blocks are provided on one side of the liner.
[0014] As a preferred embodiment, the engaging groove is a rectangular groove, and the engaging groove extends to a position close to the middle of the inner side wall of the catheter body.
[0015] As a preferred implementation, the outer side wall of the limiting ring is a curved surface structure, and the side surface of the limiting strip close to the limiting ring is a curved surface structure.
[0016] Compared with the prior art, the reunion catheter provided by the utility model has at least the following beneficial effects:
[0017] (1) By pushing the top guide core, the contracted fixing disk, elastic sheet and connecting film are moved out of the top guide core into the blood vessel and stretched to form a truncated cone structure, and the bottom guide wire is inserted into the truncated cone structure at the top of the blood vessel, so that the bottom guide wire can be quickly inserted into the top guide core, making the docking operation less difficult and more convenient, thereby improving the docking efficiency between the bottom guide wire and the top guide core and avoiding wasting a lot of time and energy.
[0018] (2) The locking block is locked on the inner lining, so that the fixed disk, elastic sheet and connecting film are contracted and located inside the guide core. The locking block is locked in the locking groove, so that the contracted fixed disk, elastic sheet and connecting film are moved out from the top guide core to the blood vessel and stretched to form a truncated cone structure, so that the position of the guide core can be limited. When the elastic sheet is inside the catheter body, the guide core will not move into the catheter body, which is convenient for limiting the position of the guide core. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 A schematic diagram of the overall structure of the reunion catheter provided by the utility model;
[0020] Figure 2 A schematic diagram of the side structure of the reunion catheter provided by the utility model;
[0021] Figure 3 A schematic cross-sectional view of the conduit provided by the utility model;
[0022] Figure 4 A schematic diagram of the engagement groove structure of the conduit provided by the utility model;
[0023] Figure 5 for Figure 1 A is a schematic diagram of the partially enlarged structure of the middle part;
[0024] Figure 6 for Figure 1 Schematic diagram of the partially enlarged structure of B.
[0025] In the figure: 1. catheter body; 2. limiting assembly 2; 21. elastic strip; 22. limiting ring; 23. limiting strip; 3. guide core; 4. lining; 5. snap-fit groove; 6. snap-fit block; 7. fixing plate; 8. elastic sheet; 9. connecting film. DETAILED DESCRIPTION
[0026] Lower extremity arteriosclerosis obliterans is caused by the formation of atherosclerotic plaques in the lower extremities, which causes lower extremity arteriosclerosis and occlusion, and then leads to chronic limb ischemia. With the improvement of the overall living standards of the society and the aging of the population, the incidence of lower extremity arteriosclerosis obliterans has increased year by year. Epidemiological surveys show that smoking, diabetes, hyperlipidemia, hypertension, hyperhomocysteinemia, hypercoagulable state, increased blood viscosity and advanced age are risk factors for lower extremity arteriosclerosis obliterans. Among them, smoking and diabetes are the most harmful. Both can increase the incidence of peripheral arterial disease by 3 to 4 times, and the risk is higher when they coexist. The second is hyperlipidemia, especially elevated blood low-density lipoprotein cholesterol, which is closely related to the occurrence of atherosclerosis in multiple parts of the body. Timely discovery of risk factors leading to arteriosclerosis and control of them can delay the progression of arteriosclerosis and reduce the risk of lower extremity arteriosclerosis obliterans. Lower extremity arteriosclerosis obliterans is generally seen in middle-aged and elderly people, often accompanied by risk factors such as smoking, diabetes, hypertension, and hyperlipidemia. The presence and severity of symptoms of lower extremity arteriosclerosis obliterans are affected by many factors, such as the speed of lesion progression, the amount of collateral circulation, and individual tolerance. Symptoms generally develop gradually from mild to severe, but when acute thrombosis occurs on the basis of arteriosclerosis obliterans, symptoms may suddenly worsen. There may be no obvious symptoms in the early stage, or only mild discomfort, such as chills and coldness. After that, intermittent claudication symptoms gradually appear, which is a characteristic symptom of lower extremity arteriosclerosis obliterans. It manifests as fatigue and soreness of the affected limb after walking a certain distance, and is forced to rest for a period of time; the symptoms can be completely relieved after resting, and the symptoms reappear after walking again. The distance of each walk and the time of rest are generally fixed; in addition, the location of soreness is correlated with the location of vascular lesions. If the lesion develops further, rest pain will occur, that is, pain in the extremities exists when the patient is resting, which is easy to occur when lying flat and resting at night. Eventually, ulcers and gangrene may occur in the limbs, which are usually caused by minor limb injuries. The severity of clinical manifestations can be divided by Fontine staging or Rutherford staging to increase the objectivity of clinical evaluation and make the results of various clinical treatments more comparable. The Rutherford staging system is currently commonly used, with seven levels from 0 to 6 from mild to severe.
[0027] In the existing treatment of arteriosclerosis obliterans, two sets of catheters, guide cores, and guide wires are usually used to clear the hardened material blocks at the top and bottom of the blood vessel respectively. After the hardened material blocks at the top and bottom are cleared, the guide wire that penetrates the blood vessel from the top position is taken out, and then the guide wire that penetrates the blood vessel from the bottom position is penetrated from bottom to top into the guide core at the top of the blood vessel (a set of guide core catheters needs to be penetrated from top to bottom in advance, and then the doctor inserts the bottom guide wire into the top guide core from bottom to top). However, due to the small caliber of the guide core, it is difficult to operate when the bottom guide wire penetrates the top guide core, which consumes a lot of time and energy. In order to solve the above technical problems, a reunion catheter is proposed to solve the problem that when the bottom guide wire penetrates the top guide core in the prior art, it is difficult to operate and consumes a lot of time and energy.
[0028] See also Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the utility model provides a reunion catheter, including a catheter body 1, a guide core 3 is movably engaged inside the catheter body 1, a fixed disk 7 is fixed at the end of the guide core 3, four elastic sheets 8 distributed in a circle are fixed on the outer wall of the fixed disk 7, a connecting film 9 is fixed between two adjacent elastic sheets 8 close to each other on one side, and a limiting component 2 is arranged at one end of the catheter body 1 and the guide core 3.
[0029] Further as Figure 2 As shown, the limiting assembly 2 includes a plurality of elastic strips 21, and there are four elastic strips 21. The elastic strips 21 are fixed to one end of the outer wall at the entrance of the guide core 3, and the elastic strips 21 are distributed in a circle, so that when the guide core 3 is engaged inside the catheter body 1, the elastic strips 21 can engage with the limiting ring 22, so that the position of the guide core 3 can be limited, and the connection between the guide core 3 and the catheter body 1 is more stable.
[0030] Further as Figure 3 As shown, the elastic strip 21 is a C-shaped structure, and a limiting ring 22 is fixed to the outer wall of the inlet of the catheter body 1. The limiting ring 22 is engaged with the elastic strip 21, so that the guide core 3 can be easily engaged with the catheter body 1, so that the position of the guide core 3 can be fixed.
[0031] Further as Figure 2 As shown, the elastic strip 21 is connected to the limiting strip 23 near one side of the limiting ring 22, and the limiting strip 23 is in contact with one side of the outer wall of the limiting ring 22 near one side of the limiting ring 22, so that after the elastic strip 21 is engaged with the limiting ring 22, the limiting strip 23 can further limit the position of the limiting ring 22, thereby preventing the limiting ring 22 from moving.
[0032] This solution has the following working process: when the catheter body 1 is inserted into the blood vessel from top to bottom, the guide core 3 is manually pulled to disengage the elastic strip 21 from the limit ring 22, the guide core 3 moves to drive the fixed disk 7 to move, the fixed disk 7 moves to drive the elastic sheet 8 to move, the elastic sheet 8 shrinks and is located inside the catheter body 1 until the engaging block 6 is moved out of the engaging groove 5, the guide core 3 is manually rotated so that the engaging block 6 does not correspond to the engaging groove 5 one by one, at this time, one side of the engaging block 6 is in contact with one side of the lining 4, the catheter body 1 is held, and the catheter body 1 is inserted into the blood vessel from top to bottom from the blood vessel incision, the guide wire is inserted into the guide core 3 so that the guide wire is moved out from the end of the guide core 3 close to the elastic sheet 8, and the hardened material block at the top of the blood vessel can be dredged by repeatedly moving the guide wire up and down.
[0033] When the catheter body 1 is inserted into the blood vessel from bottom to top, the elastic sheet 8 at one end of the other guide core 3 is contracted inside the other catheter body 1, and the catheter body 1 is inserted into the blood vessel from bottom to top, and the other guide wire is inserted into the guide core 3, and the guide wire 3 is repeatedly moved up and down to dredge the hardened material block at the bottom of the blood vessel, and the guide wire at the top of the blood vessel is taken out, and the top guide core 3 is manually rotated to make the engaging block 6 engage with the engaging groove 5, and the top guide core 3 is pushed to make the elastic sheet 8 contracted at the top move out of the top catheter body 1, and the diameter of the elastic sheet 8 after stretching is smaller than the diameter of the blood vessel, presenting a truncated cone state, and the bottom guide wire is passed through the bottom hardened material block, and the bottom guide wire is continued to be pushed so that the guide wire passes through the truncated cone formed by the elastic sheet 8 and the connecting film 9, and then enters the top guide core 3, and then other operations are performed to clean up all the hardened material blocks at the top and bottom of the blood vessel.
[0034] According to the above working process, it can be known that: by pushing the top guide core 3, the contracted fixed disk 7, elastic sheet 8 and connecting coating 9 are moved out of the top guide core 3 to the blood vessel and stretched to form a truncated cone structure, and the bottom guide wire is inserted into the top truncated cone structure of the blood vessel, so that the bottom guide wire can be quickly inserted into the top guide core 3, making the operation easier and more convenient during docking, thereby improving the docking efficiency between the bottom guide wire and the top guide core 3 and avoiding wasting a lot of time and energy.
[0035] By snapping the locking block 6 onto the inner lining 4, the fixing disk 7, the elastic sheet 8 and the connecting coating 9 are contracted and positioned inside the guide core 3. By snapping the locking block 6 onto the locking groove 5, the contracted fixing disk 7, the elastic sheet 8 and the connecting coating 9 are moved out from the top guide core 3 to the blood vessel and stretched to form a truncated cone-shaped structure, thereby limiting the position of the guide core 3. When the elastic sheet 8 is inside the catheter body 1, the guide core 3 will not move into the catheter body 1, thereby facilitating limiting the position of the guide core 3.
[0036] Further as Figure 4 As shown, a lining 4 is provided on the inner wall at the inlet of the catheter body 1, so that when the engaging block 6 is not engaged with the engaging groove 5, one side of the engaging block 6 can contact one side of the lining 4, thereby facilitating the limitation of the position of the guide core 3.
[0037] Further Figure 3 As shown, two symmetrically distributed snap-fit blocks 6 are fixed to the bottom of the outer side wall at the inlet of the guide core 3 , so as to limit the position of the guide core 3 .
[0038] Further Figure 3 As shown, the engaging block 6 is a rectangular block, so that the engaging block 6 can be engaged with the engaging groove 5, so as to limit the position of the guide core 3.
[0039] Further Figure 4 As shown, two engaging grooves 5 engaging with the engaging blocks 6 are provided on one side of the inner liner 4 , so that the position of the engaging blocks 6 can be limited, and further the position of the guide core 3 can be limited.
[0040] Further Figure 2 As shown, the engaging groove 5 is a rectangular groove, and the engaging groove 5 extends to a position close to the middle of the inner wall of the catheter body 1, so that it can cooperate with the engaging block 6 to limit the position of the guide core 3, thereby facilitating the control of the position of the guide core 3 inside the catheter body 1.
[0041] Further Figure 2 As shown, the outer wall of the limiting ring 22 is an arc surface structure, and the limiting strip 23 is an arc surface structure close to the side of the limiting ring 22, so that the position of the guide core 3 can be fixed, so that when the guide core 3 is completely located inside the catheter body 1, the guide core 3 can be engaged with the catheter body 1.
[0042] According to the above description, it can be known that when the catheter body 1 is inserted into the blood vessel from top to bottom, the guide core 3 is manually pulled to disengage the elastic strip 21 from the limit ring 22, and the movement of the guide core 3 drives the fixed disk 7 to move, and the movement of the fixed disk 7 drives the elastic sheet 8 to move, and the elastic sheet 8 shrinks and is located inside the catheter body 1 until the engaging block 6 is moved out of the engaging groove 5, and the guide core 3 is manually rotated so that the engaging block 6 does not correspond to the engaging groove 5 one by one. At this time, one side of the engaging block 6 contacts with one side of the lining 4, and the catheter body 1 is held, and the catheter body 1 is inserted into the blood vessel from top to bottom from the blood vessel incision, and the guide wire is inserted into the guide core 3 so that the guide wire is moved out from the end of the guide core 3 close to the elastic sheet 8, and the hardened material block at the top of the blood vessel can be dredged by repeatedly moving the guide wire up and down.
[0043] When inserting the catheter body 1 into the blood vessel from bottom to top, the elastic sheet 8 at one end of the other guide core 3 is contracted inside the other catheter body 1, and the catheter body 1 is inserted into the blood vessel from bottom to top, and the other guide wire is inserted into the guide core 3, and the guide wire 3 is repeatedly moved up and down to dredge the hardened material block at the bottom of the blood vessel, and the guide wire at the top of the blood vessel is taken out, and the top guide core 3 is manually rotated to make the engaging block 6 engage with the engaging groove 5, and the top guide core 3 is pushed to make the elastic sheet 8 contracted at the top move out of the top catheter body 1. The diameter of the stretched elastic sheet 8 is smaller than the diameter of the blood vessel and presents a truncated cone state, and the bottom guide wire is passed through the bottom hardened material block, and the bottom guide wire is continued to be pushed so that the guide wire passes through the truncated cone formed by the elastic sheet 8 and the connecting coating 9, and then enters the top guide core 3, and then other operations are performed to clean up all the hardened material blocks at the top and bottom of the blood vessel.
[0044] In summary: when the catheter body 1 is inserted into the blood vessel from top to bottom, the guide core 3 is manually pulled to disengage the elastic strip 21 from the limit ring 22, and the movement of the guide core 3 drives the fixed disk 7 to move, and the movement of the fixed disk 7 drives the elastic sheet 8 to move, and the elastic sheet 8 shrinks and is located inside the catheter body 1 until the engaging block 6 is moved out of the engaging groove 5, and the guide core 3 is manually rotated so that the engaging block 6 does not correspond one-to-one with the engaging groove 5. At this time, one side of the engaging block 6 contacts with one side of the lining 4, and the catheter body 1 is held, and the catheter body 1 is inserted into the blood vessel from top to bottom from the blood vessel incision, and the guide wire is inserted into the guide core 3 so that the guide wire is moved out from the end of the guide core 3 close to the elastic sheet 8, and the hardened material block at the top of the blood vessel can be dredged by repeatedly moving the guide wire up and down.
[0045] When the catheter body 1 is inserted into the blood vessel from bottom to top, the elastic sheet 8 at one end of the other guide core 3 is contracted inside the other catheter body 1, and the catheter body 1 is inserted into the blood vessel from bottom to top, and the other guide wire is inserted into the guide core 3, and the guide wire 3 is repeatedly moved up and down to dredge the hardened material block at the bottom of the blood vessel, and the guide wire at the top of the blood vessel is taken out, and the top guide core 3 is manually rotated to make the engaging block 6 engage with the engaging groove 5, and the top guide core 3 is pushed to make the elastic sheet 8 contracted at the top move out of the top catheter body 1, and the diameter of the elastic sheet 8 after stretching is smaller than the diameter of the blood vessel, presenting a truncated cone state, and the bottom guide wire is passed through the bottom hardened material block, and the bottom guide wire is continued to be pushed so that the guide wire passes through the truncated cone formed by the elastic sheet 8 and the connecting film 9, and then enters the top guide core 3, and then other operations are performed to clean up all the hardened material blocks at the top and bottom of the blood vessel.
[0046] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.
Claims
1. A reunion catheter, comprising a catheter body (1), characterized in that: A guide core (3) is movably engaged inside the catheter body (1), a fixed disk (7) is fixed at the port of the guide core (3), four elastic sheets (8) distributed in a circumference are fixed to the outer wall of the fixed disk (7), a connecting coating (9) is fixed between two adjacent elastic sheets (8) close to each other on one side, and a limiting component (2) is provided at one end of the catheter body (1) and the guide core (3).
2. A reunion catheter according to claim 1, characterized in that: The limiting component (2) comprises a plurality of elastic strips (21), wherein the elastic strips (21) are fixed to one end of the outer wall at the inlet of the guide core (3), and the elastic strips (21) are distributed in a circumferential manner.
3. A reunion catheter according to claim 2, characterized in that: The elastic strip (21) is a C-shaped structure, and a limiting ring (22) is fixed on the outer side wall of the inlet of the catheter body (1), and the limiting ring (22) is engaged with the elastic strip (21).
4. A reunion catheter according to claim 2, characterized in that: The elastic strip (21) is connected to a limiting strip (23) near a side of the limiting ring (22), and the limiting strip (23) is in contact with a side of an outer wall of the limiting ring (22) near a side of the limiting ring (22).
5. A reunion catheter according to claim 3, characterized in that: An inner lining (4) is provided on the inner side wall of the inlet of the catheter body (1).
6. A reunion catheter according to claim 4, characterized in that: Two symmetrically distributed snap-fit blocks (6) are fixed to the bottom of the outer side wall at the inlet of the guide core (3).
7. A reunion catheter according to claim 6, characterized in that: The engaging block (6) is a rectangular block.
8. The reunion catheter according to claim 5, characterized in that: Two engaging grooves (5) engaged with the engaging blocks (6) are provided on one side of the inner lining (4).
9. A reunion catheter according to claim 8, characterized in that: The engaging groove (5) is a rectangular groove, and the engaging groove (5) extends to a position close to the middle of the inner side wall of the catheter body (1).
10. The reunion catheter according to claim 7, characterized in that: The outer wall of the limiting ring (22) is a curved surface structure, and the side surface of the limiting strip (23) close to the limiting ring (22) is also a curved surface structure.