Cutting device
By designing a cutting device for the heart, the problem of difficult to predict the resection range and surgical trauma in traditional myocardial resection is solved, and the precise cutting and storage of myocardial hypertrophic tissue is achieved, which improves the therapeutic effect and safety.
Patent Information
- Application Number
- CN202323191470.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-23
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2033-11-23
AI Technical Summary
Traditional interventricular septal myocardial resection is performed in a state of cardiac arrest. The range of resection is difficult to predict, which may lead to ventricular septal perforation or conduction beam damage, and the resection effect cannot be evaluated in real time, resulting in poor surgical trauma and efficacy, and existing cutting devices cannot Cut the hypertrophic tissue growing in the human body.
A cutting device including a catheter, a cutting knife and an operating part is designed. The distal end of the cutting knife is deployed in the catheter, and the length of the catheter is rotated and displaced, and the myocardial hypertrophic tissue is cut and stored using a puncture needle and a negative pressure pipe. , support medical staff to treat hypertrophic tissues.
It realizes precise cutting and storage of hypertrophic tissues grown in the human body, reduces surgical trauma, improves the controllability and safety of the resection effect, and supports more effective treatment of hypertrophic obstructive cardiomyopathy.
Smart Images
Figure CN222265349U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical instruments, in particular to a cutting device for treating hypertrophic tissue growing in a human body. Background Art
[0002] Hypertrophic obstructive cardiomyopathy is a disease of abnormal myocardial morphology. The cause of the disease may be related to gene mutation, abnormal myocardial calcium dynamics and increased secretion of catecholamines. The pathological manifestations of this disease are asymmetric ventricular septal hypertrophy, hypertrophic myocardium protruding into the left ventricle, resulting in a reduction in left ventricular volume, a significant increase in the left ventricular outflow tract pressure gradient, mitral valve systolic anterior movement (SAM sign) and further aggravation of left ventricular outflow tract obstruction, leading to obstruction of left ventricular blood discharge and progressive deterioration of cardiac function. The clinical symptoms of this disease are mainly chest pain, dyspnea, syncope and other symptoms of heart failure. The annual mortality rate without treatment is 1.7% to 4%, mostly sudden death caused by malignant arrhythmias, and the natural prognosis is poor.
[0003] The treatments for anterior hypertrophic obstructive cardiomyopathy mainly include drug therapy, dual-chamber pacing therapy, transcoronary septal alcohol ablation and open septal myocardectomy (Morrow procedure and modified Morrow procedure). Among them, drug and dual-chamber pacing therapy can only reduce myocardial oxygen consumption and relieve heart failure symptoms to a certain extent, and enhance the patient's exercise tolerance, but cannot fundamentally eliminate the cause, so the treatment effect is limited. Alcohol ablation injects anhydrous alcohol into the first septal branch of the left anterior descending coronary artery, causing partial myocardial infarction, thinning the basal segment of the hypertrophic ventricular septum, and achieving etiological treatment of reducing hypertrophic obstruction and reducing pressure gradient. However, this method still has great limitations: ① It may cause myocardial infarction in non-target areas, resulting in abnormal myocardial motion and aggravating the condition; ② Due to myocardial scar formation, complications such as atrioventricular block and ventricular arrhythmia are highly prevalent (about 10%); ③ Due to the variation of the first septal branch, about 5% to 8% of patients are not suitable for alcohol ablation; ④ Both short-term and long-term efficacy are inferior to open septal myectomy; ⑤ It cannot treat mitral papillary muscle deformity and concurrent valve structural abnormalities. In addition, a few heart centers have tried to perform septal radiofrequency ablation through percutaneous catheters, but due to the large number of complications, it has not been widely used. Therefore, septal myectomy is still the best treatment for hypertrophic obstructive cardiomyopathy.
[0004] However, traditional ventricular septal myectomy still faces many challenges and problems: ① Since the resection is performed when the heart is stopped, the thickness and texture of the heart are different from those of the beating heart. The resection range is difficult to assess before surgery and depends entirely on the surgeon's experience. Therefore, only a very small number of experienced heart centers can perform this surgery relatively well, making it difficult to promote; ② After resection, the resection effect cannot be assessed in real time. If the resection range is too wide, it may cause ventricular septal perforation and conduction bundle damage, while incomplete resection leads to poor surgical efficacy; ③ Surgical trauma, myocardial damage and systemic inflammatory response caused by median thoracotomy, open heart surgery and extracorporeal circulation. Therefore, the surgical method of ventricular septal myectomy still needs to be improved.
[0005] Existing cutting devices are unable to cut the hypertrophic tissue in the human body to support medical staff in completing the treatment of the hypertrophic tissue. Utility Model Content
[0006] Based on this, the embodiment of the utility model discloses at least one cutting device. The cutting device includes a catheter, a cutting knife and an operating unit; the distal end of the cutting knife is disposed on the catheter; the proximal end of the cutting knife is connected to the operating unit; a receiving groove is configured on the distal side of the catheter; and the operating unit drives the distal end of the cutting knife to pass through the receiving groove along the length direction of the catheter.
[0007] In some embodiments disclosed in the present utility model, the operating unit drives the distal end of the cutting knife to rotate along the length direction of the catheter and pass through the receiving groove.
[0008] In some embodiments disclosed in the present utility model, the operating part includes a first front handle, a first rear handle and a first cutting drive mechanism; the first front handle and the first rear handle are movably connected along the length direction of the catheter and are rotationally connected perpendicular to the length direction of the catheter; the first rear handle drives the cutting knife to rotate and displace through the first cutting drive mechanism.
[0009] In some embodiments disclosed in the present utility model, the first cutting drive mechanism includes a first knife rod; the distal end of the cutting knife is coaxially rotatably connected to the first rear handle through the first knife rod.
[0010] In some embodiments disclosed in the present utility model, the first cutting drive mechanism includes a first driving wheel, a first driven wheel, and a first screw limiter; the distal end of the first knife rod is fixedly connected to the first driving wheel; the proximal end of the cutting knife is constructed as a first trimming screw; the first trimming screw is constructed with a non-threaded rod and a threaded head; the non-threaded rod of the first trimming screw is rotatably and slidingly connected to the first driven wheel; the first screw limiter constrains the displacement of the threaded head of the first trimming screw along the length direction when it rotates.
[0011] In some embodiments disclosed in the present utility model, the operating part includes a second handle, a second tool rod, a second driving wheel, a second driven wheel, a second screw limiter, an operating handle, a first bevel gear and a second bevel gear; the distal end of the second tool rod is fixedly connected to the second driving wheel; the proximal end of the cutting knife is constructed as a second trimming screw; the second trimming screw is constructed with a non-threaded rod and a threaded head; the non-threaded rod of the second trimming screw is rotatably and slidingly connected to the second driven wheel; the second screw limiter constrains the displacement of the threaded head of the second trimming screw along the length direction when it rotates; the operating handle is deployed on the outside of the second handle; the operating handle rotates synchronously with the second tool rod through the cooperation of the first bevel gear and the second bevel gear.
[0012] In some embodiments disclosed in the present utility model, the cutting device includes a puncture needle; the distal end of the puncture needle is deployed in the catheter; the proximal end of the puncture needle is connected to the operating part; the operating part drives the distal end of the puncture needle to pass through the receiving groove along the length direction of the catheter.
[0013] In some embodiments disclosed in the present utility model, the cutting knife is an annular cutting knife; the puncture needle is sleeved inside the annular cutting knife.
[0014] In some embodiments disclosed in the present utility model, the operating unit drives the distal end of the cutting knife and the distal end of the puncture needle to pass through the receiving groove along the length direction of the catheter.
[0015] In some embodiments disclosed in the present utility model, the cutting device includes a negative pressure pipe; the distal end of the catheter is configured with at least one negative pressure hole; one port of the negative pressure pipe is connected to the negative pressure hole, and the other port is used to connect to an external negative pressure generating device.
[0016] Compared with the prior art, the cutting device of the utility model can cut the hypertrophic tissue in the human body to support medical staff to complete the treatment of the hypertrophic tissue.
[0017] In view of the above-mentioned solutions, the present invention describes the exemplary embodiments disclosed in detail below with reference to the accompanying drawings, so that other features and advantages of the embodiments of the present invention are also made clear. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 This is a schematic structural diagram of a cutting device according to Embodiment 1;
[0020] Figure 2 It is a cross-sectional schematic diagram of a cutting device in Example 1;
[0021] Figure 3 It is a front view of the cutting device of the first embodiment;
[0022] Figure 4 It is a cross-sectional schematic diagram of the cutting device of Example 2;
[0023] Figure 5 is a cross-sectional schematic diagram of a cutting device in Example 3;
[0024] Figure 6 Schematic cross-section of the cutting device of Example 4.
[0025] Figures: 10, puncture needle; 11, moving block; 12, connecting rod; 20, catheter; 30, operating part; 311, first front handle; 312, first rear handle; 321, second front handle; 322, second rear handle; 331, third front handle; 332, third rear handle; 34, fourth handle; 301, push button; 302, button middle piece; 40, cutting knife; 41, knife cylinder; 511, first driving wheel; 512 , the first driven wheel; 521, the second driving wheel; 522, the second driven wheel; 531, the third driving wheel; 532, the third driven wheel; 611, the first cutter bar; 612, the second cutter bar; 613, the third cutter bar; 614, the fourth cutter bar; 71, the first trimming nut; 72, the pin; 73, the second trimming nut; 81, the operating handle; 821, the first bevel gear; 822, the second bevel gear; 90, the negative pressure pipe; 91, the negative pressure hole. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0027] Embodiment 1
[0028] This embodiment discloses a cutting device, which is used to attach, puncture and cut the hypertrophic tissue part in the human body to complete the treatment of the hypertrophic tissue. For example, the cutting device is used to attach, puncture and cut the hypertrophic myocardial tissue part in the heart cavity to enable medical staff to remove the hypertrophic myocardial tissue.
[0029] Figure 1 A schematic structural diagram of a cutting device according to the first embodiment is shown.
[0030] Figure 1 The cutting device is shown to include a catheter 20, a puncture needle 10, a cutting knife 40 assembly and an operating unit 30. The catheter 20 is used to receive a portion of myocardial hypertrophy tissue, the puncture needle 10 is deployed in the catheter 20 and can puncture the received portion of myocardial hypertrophy tissue, and the cutting knife 40 is deployed in the catheter 20 and can cut the punctured myocardial hypertrophy tissue. The operating unit 30 is used to drive the puncture needle 10 to complete the puncture action of the portion of myocardial hypertrophy tissue, and drive the cutting knife 40 to complete the cutting action of the portion of myocardial hypertrophy tissue.
[0031] Figure 2 A cross-sectional schematic diagram of a cutting device according to the first embodiment is shown. Figure 3 A front view of a cutting device according to the first embodiment is shown.
[0032] The catheter 20 is a hollow hard pipe structure, and a receiving groove is configured on the distal side of the catheter 20. When the receiving groove faces the myocardial hypertrophy tissue, it touches and squeezes the tissue, so that part of the myocardial hypertrophy tissue can enter the catheter 20 through the receiving groove.
[0033] The cutting knife 40 assembly includes a cutting knife 40 and a knife barrel 41. The cutting knife 40 is an annular cutting knife 40, and the annular cutting knife 40 is movably connected along the length direction of the catheter 20. The distal end of the cutting knife 40 is configured as an annular blade that can be used to cut the growth and hypertrophy tissue entering the receiving groove when passing through the receiving groove. The proximal end of the cutting knife 40 is connected to the operating part 30 through the knife barrel 41. The operating part 30 can drive the knife barrel 41 and the cutting knife 40 to move and rotate along the length direction.
[0034] The puncture needle 10 is a hard rod structure. The puncture needle 10 is connected to the moving block 11 disposed in the catheter 20. The moving block 11 and the puncture needle 10 are respectively sleeved in the cutting knife 40 and can be displaced along the length direction relative to the cutting knife 40. The proximal end of the puncture needle 10 is connected to the moving block 11, and the moving block 11 can be driven by the operating part 30 to be displaced.
[0035] The operating portion 30 includes a first front handle 311 , a first rear handle 312 , a push button 301 , a button middle piece 302 , a connecting rod 12 and a first knife rod 611 .
[0036] The first front handle 311 is connected to the catheter 20 through the push button 301 and is movably connected to the first front handle 311 along the length direction of the catheter 20. The distal end of the connecting rod 12 passes through the knife barrel 41 and is fixedly connected to the moving block 11 in the catheter 20, and the proximal end is connected to the push button 301 through the button middle piece 302. The first rear handle 312 is movably connected to the first front handle 311, and the first rear handle 312 can be displaced along the length direction and rotated perpendicular to the length direction relative to the first front handle 311. The first rear handle 312 is fixedly connected to the proximal end of the cutting knife 40 through the first knife rod 611, and the axis of the first rear handle 312 coincides with the axis of the cutting knife 40.
[0037] Preferably, the distal end of the catheter 20 is configured with a plurality of negative pressure holes 91, each of which is connected to a negative pressure pipe 90, and the negative pressure pipe 90 is connected to an external negative pressure generating device. The negative pressure pipe 90 is a closed pipeline configured along the length direction on the outer periphery of the catheter 20, and the negative pressure pipe 90 extends into the operating part 30 along the length direction of the catheter 20, and is connected to the catheter 20 of the negative pressure generating device in the operating part 30.
[0038] Based on this, when the cutting device of this embodiment is used in the human body, the medical staff adjusts the angle of the handle to make the distal end of the catheter 20 close to the hypertrophic tissue. The medical staff then rotates the assembly as a whole so that the storage groove can touch and squeeze and / or negatively pressurize the part of the hypertrophic tissue attached. When the storage groove contains part of the hypertrophic tissue, the medical staff pushes the push button 301 toward the proximal end, and the push button 301 causes the puncture needle 10 to move toward the distal end of the catheter 20 through the transmission of the button middle piece 302, the connecting rod 12 and the moving block 11 during the pushing process. The puncture needle 10 will puncture the part of the hypertrophic tissue stored in the storage groove during the displacement to the distal end of the catheter 20. After the medical staff completes the puncture and fixation of the part of the hypertrophic tissue through the cutting device, the rear handle is pushed forward, and the rear handle causes the cutting knife 40 to move toward the distal end of the catheter 20 through the transmission of the knife rod during the pushing process. The cutting knife 40 will cut the punctured hypertrophic tissue during the displacement to the distal end of the catheter 20.
[0039] Embodiment 2
[0040] This embodiment discloses a cutting device, which is used to attach and cut a part of a tissue that grows and hypertrophies in a human body to complete a treatment activity on the growing and hypertrophic tissue. For example, the cutting device is used to attach and cut a part of a myocardial hypertrophy tissue in a heart cavity to enable medical staff to remove the myocardial hypertrophy tissue.
[0041] The second embodiment has an operating unit 30 which is different from the first embodiment.
[0042] Figure 4 A cross-sectional schematic diagram of the cutting assembly of the second embodiment is shown.
[0043] Figure 4 The operating part 30 is shown to include a second front handle 321, a second rear handle 322, a second cutter bar 612, a first driving wheel 511, a first driven wheel 512, and a first trimming nut. The second front handle 321 is connected to the catheter 20 through the connection, and the second rear handle 322 is movably connected to the second front handle 321. The second rear handle 322 can be displaced along the length direction and rotated in the perpendicular length direction relative to the second front handle 321. The distal end of the second cutter bar 612 is fixedly connected to the first driving wheel 511. The proximal end of the cutting knife 40 is configured as a first trimming screw. The first trimming screw is configured with a non-threaded rod and a threaded head. The non-threaded rod of the first trimming screw is connected to the first driven wheel 512 for rotation and sliding. The first trimming nut 71 is fixed to the second front handle 321 to restrict the displacement of the threaded head of the first trimming screw along the length direction when it rotates.
[0044] Based on this, when the cutting device of this embodiment is used in human body, the medical staff adjusts the angle of the handle to make the distal end of the catheter 20 close to the hypertrophic tissue. The medical staff then rotates the assembly as a whole so that the storage groove can touch and squeeze and / or negatively pressurize the part of the hypertrophic tissue attached. When the storage groove contains part of the hypertrophic tissue, the medical staff rotates the rear handle relative to the front handle. During the rotation of the rear handle, the first active wheel 511 rotates the first driven wheel 512, and when the first driven wheel 512 rotates, the second cutter rod 612 and the first trimming screw at its proximal end rotate coaxially. Because the first trimming screw is threadedly connected to the first trimming nut 71, the first trimming nut 71 is fixed to the front handle, and the first trimming screw is restricted to move and rotate circumferentially along the length direction, then the distal end of the second cutter rod 612 can rotate through the storage groove, thereby achieving tissue cutting in the storage groove.
[0045] Embodiment 3
[0046] This embodiment discloses a cutting device, which is used to attach and cut a part of a tissue that grows and hypertrophies in a human body to complete a treatment activity on the growing and hypertrophic tissue. For example, the cutting device is used to attach and cut a part of a myocardial hypertrophy tissue in a heart cavity to enable medical staff to remove the myocardial hypertrophy tissue.
[0047] The third embodiment has an operating unit 30 which is different from the second embodiment.
[0048] Figure 5 A cross-sectional schematic diagram of the cutting assembly of the third embodiment is shown.
[0049] Figure 5 The operating part 30 is shown to include a third front handle 331, a third rear handle 332, a third cutter bar 613, a second driving wheel 521, a second driven wheel 522, and a pin 72. The third front handle 331 is connected to the catheter 20 through the third rear handle 332, and the third rear handle 332 is movably connected to the third front handle 331. The third rear handle 332 can be displaced along the length direction and rotated perpendicular to the length direction relative to the third front handle 331. The distal end of the third cutter bar 613 is fixedly connected to the second driving wheel 521. The proximal end of the cutting knife 40 is configured as a second trimming screw. The second trimming screw is configured with a non-threaded rod and a threaded head. The non-threaded rod of the second trimming screw is connected to the second driven wheel 522 for rotation and sliding. The pin 72 constrains the displacement of the threaded head of the second trimming screw along the length direction when it rotates. The cooperation of the pin 72 constraining the second trimming screw is equivalent to the cooperation of the first trimming nut 71 and the first trimming screw in the second embodiment.
[0050] Embodiment 4
[0051] This embodiment discloses a cutting device, which is used to attach and cut a part of a tissue that grows and hypertrophies in a human body to complete a treatment activity on the growing and hypertrophic tissue. For example, the cutting device is used to attach and cut a part of a myocardial hypertrophy tissue in a heart cavity to enable medical staff to remove the myocardial hypertrophy tissue.
[0052] The fourth embodiment has an operating unit 30 which is different from the first embodiment.
[0053] Figure 6 A cross-sectional schematic diagram of the cutting assembly of the fourth embodiment is shown.
[0054] Figure 6 The operating part 30 is shown to include a fourth handle 34, a fourth cutter bar 614, a third driving wheel 531, a third driven wheel 532, a third trimming nut, an operating handle 81, a first bevel gear 821 and a second bevel gear 822. The distal end of the fourth cutter bar 614 is fixedly connected to the third driving wheel 531. The proximal end of the cutting knife 40 is configured as a third trimming screw. The third trimming screw is configured with a non-threaded rod and a threaded head. The non-threaded rod of the third trimming screw is connected to the third driven wheel 532 for rotation and sliding. The second trimming nut 73 constrains the threaded head of the third trimming screw to move in the length direction when rotating. The operating handle 81 is disposed outside the fourth handle 34. The operating handle 81 rotates synchronously with the fourth cutter bar 614 through the cooperation of the first bevel gear 821 and the second bevel gear 822.
[0055] Based on this, when the cutting device of this embodiment is used in human body, the medical staff adjusts the angle of the handle to make the distal end of the catheter 20 close to the hypertrophic tissue. The medical staff then rotates the assembly as a whole so that the storage groove can touch and squeeze and / or negatively pressurize the part of the hypertrophic tissue attached to the growth. When the storage groove contains part of the hypertrophic tissue, the medical staff rotates the operating handle 81 relative to the front handle, and the operating handle 81 rotates the third driving wheel 531 through the cooperation of the first bevel gear 821 and the second bevel gear 822 during the rotation process. The third driving wheel 531 rotates the third driven wheel 532, and when the third driven wheel 532 rotates, the fourth cutter rod 614 and the third trimming screw at its proximal end rotate coaxially. Because the third trimming screw is threadedly connected with the third trimming nut, the third trimming nut is fixed to the front handle, and the third trimming screw is restricted to move and rotate circumferentially along the length direction, then the distal end of the fourth cutter rod 614 can rotate through the storage groove, thereby realizing the cutting of the tissue in the storage groove.
[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A cutting device, characterized in that: The cutting device comprises a catheter, a cutting knife and an operating part; The distal end of the cutting knife is disposed on the catheter; The proximal end of the cutting knife is connected to the operating part; The distal side of the catheter is configured with a receiving groove; The operating part drives the distal end of the cutting knife to pass through the receiving groove along the length direction of the catheter.
2. The cutting device according to claim 1, characterized in that: The operating part drives the distal end of the cutting knife to rotate along the length direction of the catheter and pass through the receiving groove.
3. The cutting device according to claim 2, characterized in that The operating part includes a first front handle, a first rear handle and a first cutting drive mechanism; The first front handle and the first rear handle are movably connected along the length direction of the catheter and are rotationally connected perpendicular to the length direction of the catheter; The first rear handle drives the cutting knife to rotate and move through the first cutting drive mechanism.
4. The cutting device according to claim 3, characterized in that The first cutting drive mechanism includes a first cutter bar; The distal end of the cutting knife is coaxially rotatably connected to the first rear handle through the first knife rod.
5. The cutting device according to claim 4, characterized in that The first cutting drive mechanism includes a first driving wheel, a first driven wheel, and a first screw stopper; The distal end of the first knife rod is fixedly connected to the first driving wheel; The proximal end of the cutting knife is configured as a first trimming screw; The first trimming screw is constructed with a non-threaded rod and a threaded head; The non-threaded rod of the first trimming screw is connected to the first driven wheel in a rotational and sliding manner; The first screw limiter restricts the thread head of the first trimming screw from being displaced along the length direction when the thread head rotates.
6. The cutting device according to claim 2, characterized in that The operating part includes a second handle, a second cutter bar, a second driving wheel, a second driven wheel, a second screw stopper, an operating handle, a first bevel gear and a second bevel gear; The distal end of the second knife rod is fixedly connected to the second driving wheel; The proximal end of the cutting knife is configured as a second trimming screw; The second trimming screw is constructed with a non-threaded rod and a threaded head; The non-threaded rod of the second trimming screw is connected to the second driven wheel in a rotational and sliding manner; The second screw limiter restricts the thread head of the second trimming screw from rotating so as to move along the length direction; The operating handle is disposed outside the second handle; The operating handle rotates synchronously with the second knife rod through the cooperation of the first bevel gear and the second bevel gear.
7. The cutting device according to claim 1, characterized in that The cutting device includes a puncture needle; The distal end of the puncture needle is disposed on the catheter; The proximal end of the puncture needle is connected to the operating part; The operating part drives the distal end of the puncture needle to pass through the receiving groove along the length direction of the catheter.
8. The cutting device according to claim 7, characterized in that The cutting knife is an annular cutting knife; The puncture needle is sleeved inside the annular cutting knife.
9. The cutting device according to claim 7, characterized in that: The operating part drives the distal end of the cutting knife and the distal end of the puncture needle to pass through the receiving groove along the length direction of the catheter.
10. The cutting device according to claim 1, characterized in that The cutting device comprises a negative pressure pipeline; The distal end of the catheter is configured with at least one negative pressure hole; One port of the negative pressure pipeline is connected to the negative pressure hole, and the other port is used to connect to an external negative pressure generating device.