Myocardial rotary atherectomy system with barbed piercing needle

Abstract

The application discloses a myocardial rotary cutting system containing a barbed puncture needle, which comprises a shell, a rotary cutting device assembly and a negative pressure device assembly are arranged in the shell, the rotary cutting device assembly extends to the outside of the shell, and an inner cavity of the rotary cutting device assembly is communicated with an inner cavity of the shell; a resection window and a tissue storage chamber are arranged on a side face of the rotary cutting device assembly away from the shell, the resection window is communicated with the inner cavity, a rotary cutting tube is arranged in the rotary cutting device assembly, a first bevel gear is connected to one end of the rotary cutting tube, a rotary cutting blade is formed at the other end of the rotary cutting tube, and the rotary cutting blade can form a continuous axial resection action relative to the resection window based on axial rotation; when the rotary cutting tube shields the resection window, the resection window is in a closed state; a puncture needle is arranged in the rotary cutting tube, and the puncture needle is sleeved with a boss-shaped barb structure; and the application can realize locking of tissue, continuous mechanical rotary cutting and accurate resection of myocardial tissue under a minimally invasive incision state.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and in particular relates to a myocardial rotation system containing a barbed puncture needle. Background Technology

[0002] Hypertrophic cardiomyopathy (HCM) is reported to cause various symptoms, including exertional dyspnea, chest pain, palpitations, and syncope. Serious complications can arise, leading to disease progression or death. While the incidence of sudden cardiac death is only 1%, it remains a leading cause of death among HCM patients, particularly young patients, and is a major cause of sudden death in adolescents and athletes.

[0003] Hypertrophic obstructive cardiomyopathy is a hereditary heart disease characterized by significant thickening of the interventricular septum. Currently, there are four main treatment methods: drug therapy, alcohol septal ablation, traditional open-heart surgery, and radiofrequency ablation. However, these surgeries all have significant limitations. Drug therapy can only provide varying degrees of symptom relief but cannot fundamentally resolve the obstruction; open-heart surgery carries high risks and causes significant harm to the body; and alcohol septal ablation and radiofrequency ablation are both accompanied by a series of complications.

[0004] Therefore, patients with hypertrophic obstructive cardiomyopathy are like a "time bomb" hidden deep inside their bodies. They are afraid of the risks of surgery and dare not have surgery to eradicate it. They rely on medication to relieve symptoms, which makes them constantly shrouded in the psychological pressure of sudden death and live in the fear of the unknown, which seriously affects their quality of life. Summary of the Invention

[0005] In view of the problems existing in the existing myocardial tissue resection instruments, the present invention provides a myocardial rotary resection system with a barbed puncture needle, which can achieve continuous resection and precise resection of myocardial tissue under minimally invasive incision conditions.

[0006] To solve the above problems, the technical solution provided by the present invention is as follows:

[0007] This invention provides a myocardial rotary cutting system with a barbed puncture needle, including a housing (5), wherein a rotary cutting device assembly (1) and a negative pressure device assembly (3) are disposed inside the housing (5);

[0008] The rotary cutting device assembly (1) extends outside the housing (5), and its internal cavity communicates with the internal cavity of the housing (5). The rotary cutting device assembly (1) is provided with a cutting window (1-4) and a tissue storage chamber (1-2) on the side away from the housing (5). The cutting window (1-4) communicates with its internal cavity. The rotary cutting device assembly (1) is provided with a rotary cutting tube (1-5). One end of the rotary cutting tube (1-5) is connected to a first bevel gear (1-6), and the other end forms a rotary cutting blade (1-12). The rotary cutting blade (1-12) can perform a continuous axial cutting action relative to the cutting window (1-4) based on axial rotation. When the rotary cutting tube (1-5) blocks the cutting window (1-4), the cutting window (1-4) is in a closed state.

[0009] The rotary cutting tube (1-5) is provided with a puncture needle (1-3), and the puncture needle (1-3) is fitted with a boss-shaped barb structure (1-11); the negative pressure device assembly (3) is connected to a vacuum pump (3-1), and the vacuum pump (3-1) is connected to the internal cavity of the rotary cutting device assembly (1) to form a negative pressure adsorption force in the cutting window (1-4).

[0010] According to an optional embodiment of the present invention, a mechanical drive assembly (2) is further included, the mechanical drive assembly (2) including a trigger (2-1), a hinge (2-2), a second spring (2-3), a rack (2-4), a latch (2-6), a torsion spring (2-7), a limiting pin (2-8), and a second bevel gear (2-10), the puncture needle (1-3) being connected to the latch (2-6); when the rotary cutting device assembly (1) is inserted into the tissue requiring surgery, the negative pressure device assembly (3) is activated, and then by manually pulling the trigger (2-1), the trigger (2-1) drives the hinge (2-2) to move, the hinge (2-2) drives the rack (2-4) to move, the rack (2-4) drives the second bevel gear (2-10) to move, and the second bevel gear (2-10) is linked to the first The bevel gear (1-6) rotates at a preset angle to open the rotary cutting window (1-4). After the tissue is attracted into the rotary cutting window (1-4), the puncture needle (1-3) instantly pierces the tissue when the trigger (2-1) and the limiting pin (2-8) are released, puncturing and fixing the target that has entered the cavity from the rotary cutting window (1-4). The trigger (2-1) is pulled until it is fully engaged, and the second bevel gear (2-10) rotates the rotary cutting blade 180° in conjunction with the first bevel gear (1-6) to remove the target tissue. The trigger (2-1) is released, and under the action of the torsion spring (2-7), the trigger (2-1) is driven to reset the rotary cutting window (1-4) and close. The lever (2-6) is engaged to drive the puncture needle (1-3) to return the cut tissue to the tissue storage chamber (1-2).

[0011] According to an optional embodiment of the present invention, the end of the rotary cutting device assembly (1) is connected to a gooseneck (4), the outer wall of which is smooth and can smoothly enter the target position, reducing obstruction.

[0012] According to an optional embodiment of the present invention, the rotary cutting device assembly (1) is provided with a compression rod (1-1). When the puncture needle (1-3) and the barbed structure (1-11) push the rotary-cut tissue, the compression rod (1-1) is driven by the buckle (2-6) to move the rotary-cut tissue to the tissue storage chamber (1-2) to avoid the risk of tissue falling into the body and causing thrombosis.

[0013] According to an optional embodiment of the present invention, a first spring (1-8) is wound around the end of the puncture needle (1-3) away from the rotary cutting device assembly (1).

[0014] Compared with the prior art, the embodiments of the present invention provide a myocardial rotary cutting system with a barbed puncture needle, which has the following beneficial effects:

[0015] (1) The various functional components in the myocardial resection system provided by the present invention are mechanically linked to each other and all have a resetting function. This innovatively introduces the rotary cutting tissue and stores it, so as to realize the continuous removal of target tissue in the body at the same time, realize the continuous myocardial resection until the therapeutic effect is achieved, further increase the surgical efficiency, reduce the risk of bleeding, and increase the success rate of the surgery.

[0016] (2) The myocardial resection system provided by the present invention has a cutting window orientation that is conducive to the resection of hypertrophic myocardium in the interventricular septum below the aortic valve and myocardium in the direction of the apex, and is also suitable for attending physicians who are left-handed.

[0017] (3) In practical applications, the myocardial resection system provided by this invention can achieve a minimally invasive incision (4cm), reducing puncture wounds to the heart and intraoperative bleeding. The heart continues to beat, allowing for precise control of the amount of myocardium removed, flexible resection plans, and achieving therapeutic effects in a single procedure.

[0018] (4) In practical applications, the myocardial resection system provided by the present invention can be operated with one hand, and the single-hand operation is highly stable, does not shift, and is accurately positioned. It can complete the actions of opening the window, adsorption, rotary cutting, reservoir tissue, and closing the window with one click, avoiding the complications caused by displacement difference caused by two-hand operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments or prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 and Figure 2 This is a schematic diagram of a myocardial slicing system containing a barbed puncture needle, provided as an embodiment of this application.

[0021] Figure 3 This is a schematic diagram of the cutting window structure of a myocardial cutting system with a barbed puncture needle, provided in an embodiment of this application.

[0022] Figure 4 This is a schematic diagram of the rotary cutting blade structure of a myocardial rotary cutting system containing a barbed puncture needle, provided in an embodiment of this application.

[0023] Figure 5 This is a schematic diagram of the puncture needle structure of a myocardial slicing system with a barbed puncture needle, provided in an embodiment of this application.

[0024] Figure 6 This is a schematic diagram of the cutting window, puncture needle, and tissue storage chamber of a myocardial rotary cutting system with a barbed puncture needle, provided for an embodiment of this application.

[0025] Figure 7 This is a schematic diagram of the mechanical drive component structure of a myocardial rotary cutting system containing a barbed puncture needle, provided in an embodiment of this application.

[0026] Figure 8 This is a functional diagram of the rotary cutting cavity connection and negative pressure vacuum component of a myocardial rotary cutting system with a barbed puncture needle provided in an embodiment of this application.

[0027] Figure 9 This is a schematic diagram of the appearance of a myocardial slicing system containing a barbed puncture needle, provided as an embodiment of this application.

[0028] Figure 10 This is a schematic diagram of the compression rod of a myocardial rotary cutting system containing a barbed puncture needle, provided as an embodiment of this application. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] like Figures 1-10 As shown, this embodiment of the invention provides a myocardial rotary cutting system with a barbed puncture needle, including a housing 5, and a rotary cutting device assembly 1 and a negative pressure device assembly 3 disposed inside the housing 5.

[0031] The rotary cutting device assembly 1 extends outside the housing 5, and its internal cavity communicates with the internal cavity of the housing 5; the rotary cutting device assembly 1 has a cutting window 1-4 and a tissue storage chamber 1-2 on the side away from the housing 5, as shown in the reference. Figure 3 and Figure 6 The cutting window 1-4 is connected to its internal cavity. The rotary cutting device assembly 1 is provided with a rotary cutting tube 1-5. One end of the rotary cutting tube 1-5 is connected to a first bevel gear 1-6, and the other end forms a rotary cutting blade 1-12. The rotary cutting blade 1-12 can perform a continuous axial cutting action relative to the cutting window 1-4 based on axial rotation. When the rotary cutting tube 1-5 blocks the cutting window 1-4, the cutting window 1-4 is in a closed state.

[0032] like Figure 2 , Figure 5 and Figure 6 As shown, a puncture needle 1-3 is provided inside the rotary cutting tube 1-5. The puncture needle 1-3 is fitted with a boss-shaped barb structure 1-11. A first spring 1-8 is wound around the end of the puncture needle 1-3 away from the rotary cutting device assembly 1. A sleeve 1-9 is also provided on the outside of the puncture needle 1-3. The sleeve 1-9 has a groove 2-9.

[0033] like Figure 2 and Figure 8 As shown, the negative pressure device assembly 3 is connected to a vacuum pump 3-1, which communicates with the internal cavity of the rotary cutting device assembly 1. The two are sealed by a sealing ring 3-2. In this embodiment, the negative pressure device assembly and the rotary cutting device assembly are configured to form a negative pressure state within the internal cavity of the rotary cutting device assembly, creating a negative pressure suction force at the cutting window 1-4, which can further prevent the formation of artificial thrombosis and its complications in the cut tissue.

[0034] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 10As shown, the myocardial slicing system also includes a mechanical drive assembly 2, which includes a trigger 2-1, a hinge 2-2, a second spring 2-3, a rack 2-4, a latch 2-6, a torsion spring 2-7, a limiting pin 2-8, and a second bevel gear 2-10. The puncture needle 1-3 is connected to the latch 2-6. The hinge 2-2 is fixed to the housing 5 by screws 2-11 and 2-5. When the slicing device assembly 1 is inserted into the tissue to be operated on, the negative pressure device assembly 3 is activated. Then, by manually pulling the trigger 2-1, the trigger 2-1 drives the hinge 2-2 to move, the hinge 2-2 drives the rack 2-4 to move, the rack 2-4 drives the second bevel gear 2-10 to move, and the second bevel gear 2-10 rotates the first bevel gear 1-6 by a preset angle to open the slicing window 1-4. After the tissue is sucked into the slicing window 1-4, the puncture needle 1-3 is engaged by the trigger 2-1 and the limiting pin 2-8. The release of the trigger instantly punctures the tissue, piercing and fixing the target entering the cavity through the rotary cutting window 1-4. Continuing to pull the trigger 2-1 until it is fully engaged causes the second bevel gear 2-10 to rotate the rotary cutting blade 180°, removing the target tissue. Releasing the trigger 2-1, under the action of the torsion spring 2-7, causes the trigger 2-1 to reset and close the rotary cutting window 1-4. Pulling the lever 2-6 then moves the puncture needle 1-3 and the compression rod 1-1, causing the cut tissue to retract into the tissue storage chamber 1-2. Simultaneously, the rack and pinion reset, the puncture needle resets, and the release lever, under the spring force, resets, preparing for the next round of resection. This myocardial rotary cutting system of the present invention can achieve tissue locking and continuous mechanical rotary cutting under minimally invasive incision conditions, precisely removing myocardial tissue.

[0035] like Figure 3 , Figure 6 and Figure 10 As shown, the end of the rotary cutting device assembly 1 is connected to a gooseneck tip 4. The outer wall of the gooseneck tip 4 is smooth and can be smoothly inserted into the target position, reducing obstruction. When the puncture needle 1-3 and the barbed structure 1-11 push the rotary-cut tissue, the compression rod 1-1 moves it to the tissue storage chamber 1-2 to avoid the risk of tissue falling into the body and causing thrombosis.

[0036] During the entire process of the component entering the myocardial ventricle, it protects the tissue from being scraped by the cutting windows 1-4. Upon reaching the target position, the cutting windows 1-4 are closed. By manually pulling the trigger of the mechanical drive component 2, the second bevel gear 2-10, in conjunction with the first bevel gear 1-6, rotates to a preset angle, opening the cutting windows 1-4. After tissue removal is completed, the trigger is released, and the windows close. This prevents the entire component from scraping the tissue during withdrawal, thus avoiding inflammation or infection. The preset angle is 0–180°.

[0037] In this embodiment, the opening direction of the rotary cutting windows 1-4 is on the left side of the instrument and perpendicular to the ground. Since the target is on the left side of the rotary cutting rod when the instrument enters from the apex of the heart, this effectively solves the problem of the surgeon being left-handed. The surface of the resection cavity body of the rotary cutting device assembly 1 has an ultrasound imaging enhancement feature, or the resection cavity body in the assembly uses a polymer material with added barium sulfate to enhance ultrasound imaging.

[0038] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention and within the spirit and principles of the present invention should be included within the scope of protection of the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A myocardial resection system comprising a barbed piercing needle, the system comprising: The shell (5) is internally provided with a rotary cutting device assembly (1) and a negative pressure device assembly (3); The rotary cutting device assembly (1) extends to the outside of the shell (5) and is in communication with the internal cavity of the shell (5); the rotary cutting device assembly (1) is provided with a resection window (1-4) and a tissue storage chamber (1-2) on the side away from the shell (5); the resection window (1-4) is in communication with the internal cavity thereof; the rotary cutting device assembly (1) is internally provided with a rotary cutting tube (1-5) having a first bevel gear (1-6) connected to one end and a rotary cutting blade (1-12) formed at the other end; the rotary cutting blade (1-12) can form a continuous axial resection action relative to the resection window (1-4) based on axial rotation; when the rotary cutting tube (1-5) blocks the resection window (1-4), the resection window (1-4) is in a closed state; The rotary cutting tube (1-5) is internally provided with a puncture needle (1-3) sleeved with a boss-shaped barb structure (1-11); the negative pressure device assembly (3) is connected with a vacuum pump (3-1) in communication with the internal cavity of the rotary cutting device assembly (1) for forming a negative pressure adsorption force on the resection window (1-4); Further comprising a mechanical driving assembly (2) including a trigger (2-1), a hinge (2-2), a second spring (2-3), a rack (2-4), a catch (2-6), a torsional spring (2-7), a limit pin (2-8) and a second bevel gear (2-10); the puncture needle (1-3) is connected with the catch (2-6); when the rotary cutting device assembly (1) is inserted into the tissue to be operated, the negative pressure device assembly (3) is turned on, then the trigger (2-1) is manually cocked, the trigger (2-1) drives the hinge (2-2) to move, the hinge (2-2) drives the rack (2-4) to move, the rack (2-4) drives the second bevel gear (2-10) to move, the second bevel gear (2-10) rotates the first bevel gear (1-6) by a preset angle to open the resection window (1-4); after the tissue is adsorbed into the resection window (1-4), the puncture needle (1-3) instantaneously pierces the tissue under the release of the trigger (2-1) and the limit pin (2-8) to puncture and fix the target entering the cavity from the resection window (1-4); the trigger (2-1) is continuously cocked until it is fully cocked, the second bevel gear (2-10) rotates the first bevel gear (1-6) by 180° to resect the target tissue; the trigger (2-1) is released, under the action of the torsional spring (2-7), the trigger (2-1) is reset, the resection window (1-4) is closed, the catch (2-6) is actuated to drive the puncture needle (1-3) to make the resected tissue retreat into the tissue storage chamber (1-2). The rotary cutting device assembly (1) is connected with a goose nose (4) at one end, the outer wall of the goose nose (4) is smooth, and the goose nose (4) can be smoothly inserted into a target position, reducing obstruction. A first spring (1-8) is wound on the end of the puncture needle (1-3) away from the rotary cutting device assembly (1).

2. The system of claim 1, wherein the barbed needle is a helical needle. The rotary cutting device assembly (1) is provided with a compression rod (1-1), when the puncture needle (1-3) and the barb structure (1-11) push the cut tissue, the compression rod (1-1) is driven by the trigger (2-6) to move the cut tissue to the tissue storage chamber (1-2), avoiding the risk of thrombosis caused by the tissue falling into the body.

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