Puncture assembly

Abstract

The utility model discloses a puncture assembly. The puncture assembly comprises a catheter, a puncture needle and an operation part; the far end of the puncture needle is deployed in the catheter; the near end of the puncture needle is connected with the operation part; a containing groove is formed in the side face of the far end of the catheter, and the operation part drives the far end of the puncture needle to pass through the containing groove in the length direction of the catheter; a notch inclination angle is formed in the edge of the part, facing the puncture needle, of the containing groove, and the notch inclination angle is used for resetting the deviated far end of the puncture needle. The puncture assembly can better puncture and fix hypertrophy tissues in a human body so as to support medical staff to complete treatment on the hypertrophy tissues.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to a puncture component 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] Myocardial resection requires puncture and fixation of the myocardial tissue to be removed before resection, so that medical staff can remove or treat the punctured or unpunctured myocardial tissue. Currently, there is no special device to assist in puncturing and fixing myocardial tissue. Utility Model Content

[0006] Based on this, the embodiment of the utility model discloses at least one puncture assembly. The puncture assembly includes a catheter, a puncture needle and an operating unit; the distal end of the puncture needle is disposed in the catheter; the proximal end of the puncture needle is connected to the operating unit; a storage groove is configured on the distal side of the catheter, and the operating unit drives the distal end of the puncture needle to pass through the storage groove along the length direction of the catheter; the storage groove is configured with a notch inclination at the edge of the portion facing the puncture needle, and the notch inclination is used to reset the distal end of the deviated puncture needle.

[0007] In some embodiments disclosed in the present utility model, the puncture needle is away from the central axis of the catheter.

[0008] In some embodiments disclosed in the present utility model, the puncture needle is close to the opening of the receiving groove.

[0009] In some embodiments disclosed in the present utility model, the distal end of the puncture needle is configured as an inclined needle tip.

[0010] In some embodiments disclosed in the present utility model, the inclined tip of the inclined needle tip is close to the opening of the receiving groove.

[0011] In some embodiments disclosed in the present utility model, the distal end of the catheter is configured with a receiving hole; the receiving hole is used to receive the distal end of the puncture needle after the puncture needle passes through the receiving groove.

[0012] In some embodiments disclosed in the present utility model, a positioning hole is constructed between the notch inclination angle and the receiving hole.

[0013] In some embodiments disclosed in the present utility model, the receiving groove is configured as an inwardly recessed arc-shaped groove.

[0014] In some embodiments disclosed in the present utility model, the puncture needle includes a moving block deployed in the catheter; the moving block is displaced along the length direction of the catheter; the proximal end of the puncture needle is connected to the moving block, and the moving block is driven by the operating part.

[0015] In some embodiments disclosed in the present utility model, the operating part includes a handle, a push button and a connecting rod; the handle is connected to the catheter;

[0016] The push button is movably connected to the handle along the length direction of the catheter; the distal end of the connecting rod is connected to the moving block in the catheter, and the proximal end is connected to the push button.

[0017] Compared with the prior art, the puncture assembly of the utility model can better puncture and fix the hypertrophic tissue in the human body, so as to support medical staff to complete the treatment of the hypertrophic tissue.

[0018] 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

[0019] 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.

[0020] Figure 1 This is a schematic diagram of the structure of the puncture assembly of the utility model;

[0021] Figure 2 It is a cross-sectional schematic diagram of the puncture assembly of the utility model;

[0022] Figure 3 for Figure 2 An enlarged schematic diagram of part A.

[0023] The accompanying drawings are marked with: 10, puncture needle; 11, moving block; 12, connecting rod; 20, catheter; 21, storage groove; 221, storage hole; 222, positioning hole; 30, handle; 31, button; 32, button middle piece; 40, negative pressure pipe; 41, negative pressure hole. DETAILED DESCRIPTION

[0024] 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.

[0025] This embodiment discloses a puncture assembly, which is used to attach and puncture a portion of a tissue that grows and hypertrophies in a human body to support treatment activities on the growing and hypertrophic tissue. For example, the puncture assembly is used to attach and puncture a portion of a hypertrophic myocardial tissue in a heart cavity to support medical staff in completing the removal of the hypertrophic myocardial tissue.

[0026] Figure 1 A schematic structural diagram of the puncture assembly of this embodiment is shown.

[0027] Figure 1 The puncture assembly is shown to include a catheter 20, a puncture needle 10 and an operating unit. 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 operating unit is used to drive the puncture needle 10 to complete the puncture of the portion of myocardial hypertrophy tissue.

[0028] Figure 2 A cross-sectional schematic diagram of the puncture assembly of this embodiment is shown. Figure 3 Show Figure 2 An enlarged schematic diagram of part A.

[0029] Figure 2 The catheter 20 is a hollow hard pipe structure, and a receiving groove 21 is configured on the distal side of the catheter 20. When the receiving groove 21 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 21.

[0030] Figure 3 It is shown that the edge of the receiving slot 21 facing the puncture needle 10 is configured with a notch inclination angle, which is used to reset the deviated distal end of the puncture needle 10 to prevent the distal end of the puncture needle 10 from being deviated due to the beating of the patient's heart during puncture. Then, when the distal end of the puncture needle 10 touches the notch inclination angle, it will be reset to the original length direction along the inclination direction of the notch inclination angle.

[0031] Furthermore, Figure 3It is shown that the distal end of the catheter 20 is configured with a receiving hole 221 , and the receiving hole 221 faces the distal end of the puncture needle 10 . Then, after the puncture needle 10 passes through the receiving groove 21 , the distal end of the puncture needle 10 can be received in the receiving hole 221 .

[0032] In some embodiments, a positioning hole 222 inclined inwardly toward the center is constructed between the slot inclination angle and the receiving hole 221 , and the inclined surface of the positioning hole 222 is continuous with the inclined surface of the slot inclination angle.

[0033] Preferably, the receiving groove 21 is constructed as an inwardly concave arc-shaped groove, which can better receive part of the tissue of myocardial hypertrophy.

[0034] Furthermore, Figure 3 It is shown that the distal end of the catheter 20 is constructed with a plurality of negative pressure holes 41 , and the plurality of negative pressure holes 41 are respectively connected to a negative pressure pipe 40 , and the negative pressure pipe 40 is connected to an external negative pressure generating device.

[0035] Preferably, the negative pressure conduit 40 is a closed pipeline constructed along the length direction on the outer periphery of the catheter 20. The negative pressure conduit 40 extends into the handle 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.

[0036] Figure 2 The puncture needle 10 is shown to be a hard rod structure, and the distal end of the puncture needle 10 is configured as an eccentric inclined needle tip. The inclined tip of the inclined needle tip faces the opening direction of the receiving groove 21.

[0037] The puncture needle 10 deviates from the central axis of the catheter 20 in the catheter 20 and approaches the notch of the receiving groove 21. Then, the puncture needle 10 can easily puncture the part of the myocardial hypertrophy tissue, avoiding the puncture failure caused by the puncture needle 10 not being able to touch the tissue in the receiving groove 21 due to insufficient tissue entering the receiving groove 21.

[0038] Preferably, the inclined needle tip is an inclined triangular pyramid structure.

[0039] Figure 2 The puncture needle 10 is shown to include a moving block 11 disposed in the catheter 20 . The moving block 11 is displaced along the length direction of the catheter 20 . The proximal end of the puncture needle 10 is connected to the moving block 11 , and the moving block 11 is driven by the operating unit.

[0040] Figure 2 The operating part is shown to include a handle 30, a push button 31, a button middle piece, and a connecting rod 12. The handle 30 is connected to the catheter 20 through the handle 30, the push button 31 is movably connected to the handle 30 along the length direction of the catheter 20, the distal end of the connecting rod 12 is connected to the moving block 11 in the catheter 20, and the proximal end is connected to the push button 31 through the button middle piece.

[0041] Based on this, when the puncture assembly of this embodiment is used to intervene in the human body, the medical staff adjusts the angle of the handle 30 to make the distal end of the catheter 20 close to the hypertrophic tissue. The medical staff then turns the handle 30 so that the storage groove 21 can touch and squeeze and / or negatively pressurize the part of the hypertrophic tissue attached. When the storage groove 21 contains part of the hypertrophic tissue, the medical staff pushes the push button 31 toward the proximal end. During the pushing process, the push button 31 causes the puncture needle 10 to move toward the distal end of the catheter 20 through the transmission of the button middle piece, the connecting rod 12 and the moving block 11. During the displacement process toward the distal end of the catheter 20, the puncture needle 10 punctures the part of the hypertrophic tissue stored in the storage groove 21.

[0042] Then, after the medical staff completes the partial puncture and fixation of the growing hypertrophic tissue by using the puncture assembly, they can complete the partial resection of the growing hypertrophic tissue outside and / or inside the catheter by using a cutting instrument.

[0043] 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 puncture assembly, characterized in that: The puncture assembly includes a catheter, a puncture needle and an operating unit; The distal end of the puncture needle is disposed in the catheter; The proximal end of the puncture needle is connected to the operating part; The distal end side of the catheter is configured with a receiving groove, and the operating unit drives the distal end of the puncture needle to pass through the receiving groove along the length direction of the catheter; The receiving groove is configured with a notch inclination angle at a portion of the edge facing the puncture needle, and the notch inclination angle is used to reset the distal end of the deviated puncture needle.

2. The puncture assembly according to claim 1, characterized in that: The puncture needle is away from the central axis of the catheter.

3. The puncture assembly according to claim 1, characterized in that: The puncture needle is close to the opening of the receiving groove.

4. The puncture assembly according to claim 1, characterized in that: The distal end of the puncture needle is configured as an inclined needle tip.

5. The puncture assembly according to claim 4, characterized in that: The inclined tip of the inclined needle tip is close to the opening of the receiving groove.

6. The puncture assembly according to claim 1, characterized in that: The distal end of the catheter is configured with a receiving hole; The receiving hole is used to receive the distal end of the puncture needle after the puncture needle passes through the receiving groove.

7. The puncture assembly according to claim 6, characterized in that: A positioning hole is configured between the notch inclination angle and the receiving hole.

8. The puncture assembly according to claim 1, characterized in that: The receiving groove is configured as an inwardly recessed arc groove.

9. The puncture assembly according to claim 1, characterized in that: The puncture needle includes a moving block disposed within the catheter; The moving block is displaced along the length direction of the catheter; The proximal end of the puncture needle is connected to the moving block, and the moving block is driven by the operating part.

10. The puncture assembly according to claim 9, characterized in that: The operating part includes a handle, a push button and a connecting rod; The handle is connected to the catheter; The push button is movably connected to the handle along the length direction of the catheter; The distal end of the connecting rod is connected to the moving block in the catheter, and the proximal end is connected to the pushing button.

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