A tool suitable for resection of hypertrophic myocardium

Abstract

The present invention provides a tool suitable for resection of hypertrophic myocardium, comprising: an arc-shaped sheet-shaped main cutter, a sheet-shaped longitudinal cutter that matches the main cutter, and a side cutter that can be rotated laterally along the longitudinal axis of rotation of the main cutter. The main cutter is provided with a first blade at both longitudinal edges. The longitudinal edges of the main cutter are provided with longitudinal cutter slots near the first blade. The bottom side of the longitudinal cutter is provided with a second blade, and the longitudinal side of the longitudinal cutter matches the longitudinal cutter slot to form a plug-in connection. The main cutter is provided with an arc-shaped through groove in the transverse direction, and the side cutter passes through the arc-shaped through groove during the side-cutting rotation, and the arc-shaped through groove supports the side cutter. The side cutter is provided with a third blade on the side facing the main cutter. When the present invention performs myocardial tissue resection, a whole block resection is adopted, which effectively reduces the generation of tissue debris during the operation and can completely remove the cut tissue.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a tool suitable for resection of hypertrophic myocardium. Background Art

[0002] Hypertrophic cardiomyopathy is characterized by myocardial hypertrophy. It can be divided into obstructive and non-obstructive hypertrophic cardiomyopathy according to the presence or absence of obstruction in the left ventricular outflow tract. Asymmetric ventricular septal hypertrophy leading to subaortic stenosis is called idiopathic hypertrophic subaortic stenosis.

[0003] In the prior art, when treating hypertrophic cardiomyopathy, a surgical instrument similar to a scraper is generally used to scrape and remove excess myocardial tissue. During the operation, the excess myocardial tissue is removed layer by layer. The main problems with the prior art are: the cut heart debris or myocardial tissue flakes can easily fall into the ventricle. If they are not cleared out in time, it is easy to cause ventricular blockage or blood vessel blockage, thereby causing secondary injury. In severe cases, embolism may be caused by the flow of debris with the blood vessels, and cerebral infarction may occur in severe cases, endangering the patient's life; the thickness of the removed myocardial tissue is difficult to control, and excessive removal may easily lead to complications such as ventricular septal perforation, while insufficient removal may result in residual obstruction. If necessary, another surgical treatment is required, which increases the patient's pain and the social health and economic burden. Summary of the invention

[0004] To address the deficiencies in the prior art, the present invention provides a tool suitable for resection of hypertrophic myocardium, comprising: an arc-shaped or bent sheet-shaped main cutting knife, a sheet-shaped longitudinal cutting knife matching the main cutting knife, and a side cutting knife that can rotate laterally along the longitudinal axis of rotation of the main cutting knife.

[0005] The main cutter is provided with first blades at both longitudinal edges of the main cutter, and longitudinal cutter slots are provided at both longitudinal edges of the main cutter near the first blades.

[0006] A second blade is arranged on the bottom side of the longitudinal cutter, and the longitudinal side edge of the longitudinal cutter matches with the longitudinal cutter slot to form a plug-in connection.

[0007] The main cutter is provided with an arcuate through groove in the transverse direction, and the side cutter passes through the arcuate through groove during the side cutting rotation process, and the arcuate through groove supports the side cutter.

[0008] The side of the side cutter facing the main cutter is provided with a third cutting edge.

[0009] Furthermore, the main cutter is provided with at least two arc-shaped through grooves arranged in a transverse direction from the top to the bottom, and the rotation longitudinal axis passes through all the arc-shaped through grooves.

[0010] The side edge of the side cutter is provided with a rotating ring at the connection with the third blade. The rotating ring is sleeved on the rotating longitudinal axis and can move up and down along the rotating longitudinal axis and rotate in a sectional direction along the rotating longitudinal axis.

[0011] Furthermore, a scale is provided between the longitudinal axis of rotation and the first blade.

[0012] Furthermore, the scale scale is slightly raised relative to the surface of the main cutting knife.

[0013] Furthermore, each scale mark is marked with a distance number relative to the top surface or bottom surface of the main cutting knife.

[0014] Furthermore, the main cutter is provided with a chamfered surface on the side of the rotation longitudinal axis away from the first blade, the chamfered surface extending from the top surface of the main cutter to the bottom surface of the main cutter, and the chamfered surface forms an acute angle with the inner side surface of the main cutter.

[0015] Furthermore, the side cutter is in the shape of an arc piece that matches the cross section of the main cutter, and the third blade is arranged at the long straight side of the arc piece.

[0016] Furthermore, the thickness of the side cutter matches the arc-shaped through groove.

[0017] Furthermore, the bottom surface of the side cutter is flat, and the top surface is provided with a long inclined surface extending from the third blade to the top of the arc. The thickness of the top of the arc matches the arc-shaped through groove.

[0018] The present invention has at least one of the following beneficial effects:

[0019] 1. When performing myocardial tissue resection, the present invention changes the traditional layer-by-layer scraping method and adopts a whole-piece resection method, thereby effectively reducing the generation of myocardial tissue debris during the operation.

[0020] 2. The present invention can completely remove the cut myocardial tissue, thus overcoming the problem that it is difficult to remove the generated debris or flakes in the prior art.

[0021] 3. The present invention can calculate the intraoperative resection target value based on the preoperative measurement value, and control the thickness and height of the target tissue to be resected during the process, so as to achieve the purpose of precise resection and avoid complications caused by excessive or insufficient resection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The figure shows a schematic diagram of the structure of a tool suitable for hypertrophic myocardial resection according to the present invention;

[0023] Figure 2 Shown is a schematic diagram of an oblique section structure of the present invention;

[0024] In the figure: 1. main cutting knife; 101. first cutting edge; 102. slot for longitudinal cutting knife; 103. arc-shaped through slot; 104. scale; 105. rotating longitudinal axis; 106. bevel surface; 2. longitudinal cutting knife; 201. second cutting edge; 3. side cutting knife; 301. third cutting edge; 302. rotating ring. DETAILED DESCRIPTION

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0026] Please note that the terms "above", "below", "left", "right", "top", "top", "bottom", "bottom", etc. used in the present invention to describe the positional relationship do not represent the absolute positional relationship between the modules / components / assemblies / components / parts, but the relative positional relationship between the modules / components / assemblies / components / parts.

[0027] Example 1

[0028] A tool suitable for resection of hypertrophic myocardium, such as Figure 1 As shown, it includes: an arc-shaped sheet-shaped main cutting knife 1, a sheet-shaped longitudinal cutting knife 2 that matches the main cutting knife 1, and a side cutting knife 3 that can be horizontally rotated along the rotating longitudinal axis 105 of the main cutting knife 1. The main cutting knife 1 can also be a square-shaped bent sheet or other bent or arc-shaped shapes designed according to needs.

[0029] The main cutter 1 is provided with first blades 101 at both longitudinal edges. The main cutter 1 is provided with longitudinal cutter slots 102 near the first blades 101 at both longitudinal edges.

[0030] A second blade 201 is disposed on the bottom side of the longitudinal cutter 2, and the longitudinal side edge of the longitudinal cutter 2 matches with the longitudinal cutter slot 102 to form a plug-in connection.

[0031] The main cutting knife 1 is provided with an arcuate through groove 103 in the transverse direction. The side cutting knife 3 passes through the arcuate through groove 103 during the side cutting rotation process. The arcuate through groove 103 supports the side cutting knife 3 .

[0032] The side of the side cutter 3 facing the main cutter 1 is provided with a third cutting edge 301 .

[0033] When the tool for hypertrophic myocardial resection of the present invention is used, the first blade 101 of the main cutter 1 with the side cutter 3 is first aligned with the target myocardial tissue. Then the main cutter 1 is cut into the target myocardial tissue, and then the side cutter 3 is rotated so that the third blade 301 of the side cutter 3 passes through the arc-shaped through groove 103 and cuts into the target myocardial tissue laterally. Then, from above the target myocardial tissue, the longitudinal cutter 2 is cut downward along the longitudinal cutter slot 102 into the target myocardial tissue until the second blade 201 touches the upper surface of the cut side cutter 3. At this time, the target myocardial tissue is cut off in blocks and is received by the frame-shaped structure formed by the arc wall of the main cutter 1, the longitudinal cutter 2 and the side cutter 3. Finally, the tool for hypertrophic myocardial resection is taken out, and the cut target myocardial tissue received by the tool for hypertrophic myocardial resection is also taken out together. During the operation, since the target myocardial tissue is removed in a block, the removal process is all blade insertion cutting, and does not involve layer-by-layer scraping, so basically no myocardial tissue debris will be generated, and the entire piece of myocardial tissue removed will also be collected by the arc wall of the main cutter 1, the longitudinal cutter 2 and the side cutter 3. The structure is formed together, so it is easy to be taken out together with the tools suitable for hypertrophic myocardial resection, effectively overcoming the problem of the prior art that it is difficult to clean up debris or flakes. At the same time, during the operation, by controlling the curvature of the main cutter 1, the insertion depth of the main cutter 1, and the cutting position of the main cutter 1, the thickness, height and other parameters of the target tissue to be removed during the operation can be controlled.

[0034] Example 2

[0035] A tool suitable for hypertrophic myocardial resection based on the above embodiment, such as Figure 1 As shown, the main cutter 1 is provided with five arc-shaped through slots 103 arranged in a transverse direction from the top to the bottom. According to design requirements, there may also be two, three or other arc-shaped through slots 103 as required by the design. The rotating longitudinal axis 105 passes through all the arc-shaped through slots 103 .

[0036] The side edge of the side cutter 3 is provided with a rotating ring 302 at the connection with the third blade 301. The rotating ring 302 is sleeved on the rotating longitudinal axis 105 and can move up and down along the rotating longitudinal axis 105 and rotate along the rotating longitudinal axis 105 in a sectional manner.

[0037] At this time, when the target myocardial tissue is smaller than the height of the main cutter 1 (for example, the target myocardial tissue block remaining after multiple resections), the side cutter 3 can be slid up and down according to the size of the target myocardial tissue, so that the side cutter 3 can be rotated and cut into the target myocardial tissue from a suitable position through the arc-shaped through groove 103. This improves the adaptability and flexibility of the tool for hypertrophic myocardial resection of the present invention to the target myocardial tissue for surgery, so that the doctor can autonomously adjust the height of the target myocardial tissue to be resected according to needs.

[0038] Example 3

[0039] A tool suitable for hypertrophic myocardial resection based on the above embodiment, such as Figure 1 As shown, a scale 104 is provided between the rotation longitudinal axis 105 and the first blade 101. This arrangement allows the doctor to clearly know the height position of the current side cutting knife 3, thereby improving the accuracy of the doctor in controlling the height of the side cutting knife 3.

[0040] Example 4

[0041] Based on the tool for hypertrophic myocardial resection in the above embodiment, the scale mark 104 is slightly raised relative to the surface of the main cutter 1. This setting can be used to count the height of the side cutter 3 by touching the slightly raised scale mark 104 when it is difficult to observe the scale mark 104.

[0042] Example 4

[0043] Based on the tool for hypertrophic myocardial resection in the above embodiment, each of the scale marks 104 is marked with a distance number relative to the top surface or bottom surface of the main cutter 1. This setting is suitable for when the scale marks 104 can be observed. By observing the distance number marked on the scale marks 104, the doctor can know the current height position of the side cutter 3 more clearly, thereby further improving the accuracy of the doctor in controlling the height of the side cutter 3.

[0044] Example 5

[0045] A tool suitable for hypertrophic myocardial resection based on the above embodiment, such as Figure 2 As shown, the main cutter 1 is provided with a chamfered surface 106 on the side of the rotation longitudinal axis 105 away from the first blade 101. The chamfered surface 106 extends from the top surface of the main cutter 1 to the bottom surface of the main cutter 1, and the chamfered surface 106 forms an acute angle with the inner side surface of the main cutter 1.

[0046] When it is necessary to move the side cutter 3 up and down along the rotating longitudinal axis 105, it is necessary to avoid the third blade 301 of the side cutter 3 from colliding with the outer surface of the main cutter 1 near the rotating longitudinal axis 105. Therefore, the side cutter 3 needs to be rotated to a position with a larger opening angle with the main cutter 1. This causes the tool suitable for resecting hypertrophic myocardium to occupy a larger space as a whole before it is rotated into the side cutter 3, which is not conducive to placing the tool suitable for resecting hypertrophic myocardium into the ventricle, or performing the up and down displacement action of the side cutter 3 in the ventricle.

[0047] After the improvement of this embodiment, the outer surfaces of the side cutter 3 and the main cutter 1 near the rotating longitudinal axis 105 can form a smaller opening angle, so that the third blade 301 will not touch the beveled surface 106, and can be moved up and down, which greatly reduces the operating space volume required for the up and down movement of the side cutter 3, which is beneficial to the operation.

[0048] Example 6

[0049] A tool suitable for hypertrophic myocardial resection based on the above embodiment, such as Figure 1 As shown, the side cutter 3 is in the shape of an arc sheet matching the cross section of the main cutter 1, and the third blade 301 is arranged at the long straight side of the arc sheet. This arrangement enables the side cutter 3 to be supported by the arc groove 103 after it is rotated into the target myocardial tissue, and the part exposed on the outer surface of the main cutter 1 is significantly reduced, thereby facilitating the removal of the tool suitable for hypertrophic myocardial resection after the operation is completed, and reducing the possibility of the outer wall of the protruding side cutter 3 scratching the ventricle and causing other injuries.

[0050] Example 7

[0051] A tool suitable for hypertrophic myocardial resection based on the above embodiment, such as Figure 1 As shown, the thickness of the side cutter 3 matches the arcuate through groove 103. This arrangement enables the arcuate through groove 103 to form a clamping support for the side cutter 3, so that the side cutter 3 can form a relatively stable bottom support member after rotating into the target myocardial tissue.

[0052] Example 8

[0053] Based on the tool for hypertrophic myocardial resection in the above embodiment, the bottom surface of the side cutter 3 is flat, and the top surface is provided with a long inclined surface extending from the third blade 301 to the top of the arc. The thickness of the top of the arc matches the arc-shaped through groove 103.

[0054] Since the side cutter 3 adopts a rotary cutting method, when the smoothly set side cutter 3 cuts, the third blade 301 generally has a large angle between the upper and lower inclined surfaces of the blade in order to cooperate with the connected plate surface. This causes greater resistance during the cutting process, and the connection part between the side cutter 3 and the rotating longitudinal axis 105 (such as the rotating ring 302) is subjected to greater stress. The connection part or the rotating longitudinal axis 105 sometimes breaks, resulting in serious consequences such as foreign matter invading the ventricle.

[0055] The arrangement of this embodiment can effectively reduce the thickness of the plate surface of the side cutting knife 3 at the connection between the plate surface and the third blade 301, thereby significantly reducing the angle between the upper and lower inclined surfaces of the third blade 301. Combined with the inclined surface arrangement of the plate surface, the resistance encountered during the cutting process can be significantly reduced, effectively avoiding the possibility of the connection between the side cutting knife 3 and the rotating longitudinal axis 105 or the rotating longitudinal axis 105 breaking during the operation.

[0056] With the above-mentioned ideal embodiments of the present invention as inspiration, through the above-mentioned description, relevant personnel can make various changes, combinations and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A tool suitable for resection of hypertrophic myocardium, characterized in that: include: A main cutting knife (1) in the form of an arc-shaped sheet or a bent sheet, a longitudinal cutting knife (2) in the form of a sheet and matching the main cutting knife (1), and a side cutting knife (3) capable of transversely rotating along the longitudinal axis (105) of rotation of the main cutting knife (1); The main cutting knife (1) is provided with first blades (101) at both longitudinal edges of the main cutting knife (1); and longitudinal cutting knife slots (102) are provided at both longitudinal edges of the main cutting knife (1) near the first blades (101); The bottom side of the longitudinal cutting knife (2) is provided with a second blade (201), and the longitudinal side edge of the longitudinal cutting knife (2) matches with the longitudinal cutting knife slot (102) to form a plug-in connection; The main cutting knife (1) is provided with an arc-shaped through groove (103) in the transverse direction, and the side cutting knife (3) passes through the arc-shaped through groove (103) during the side cutting rotation process, and the arc-shaped through groove (103) plays a supporting role for the side cutting knife (3); The side of the side cutter (3) facing the main cutter (1) is provided with a third cutting edge (301).

2. The tool for hypertrophic myocardial resection according to claim 1, characterized in that: The main cutter (1) is provided with at least two arc-shaped through grooves (103) arranged in a transverse direction from the top to the bottom; the rotating longitudinal axis (105) passes through all the arc-shaped through grooves (103); A rotating ring (302) is provided at the side edge of the side cutting knife (3) at the connection with the third blade (301); the rotating ring (302) is sleeved on the rotating longitudinal axis (105) and can move up and down along the rotating longitudinal axis (105) and rotate in a tangential direction along the rotating longitudinal axis (105).

3. The tool for hypertrophic myocardial resection according to claim 2, characterized in that: A scale mark (104) is provided between the rotating longitudinal axis (105) and the first blade (101).

4. The tool for hypertrophic myocardial resection according to claim 3, characterized in that: The scale scale (104) is raised relative to the surface of the main cutting knife (1).

5. The tool for hypertrophic myocardial resection according to any one of claims 3 or 4, characterized in that: The scale (104) is marked with distance numbers relative to the top surface or bottom surface of the main cutting knife (1).

6. The tool for hypertrophic myocardial resection according to claim 2, characterized in that: The main cutter (1) is provided with a chamfered surface (106) on the side of the rotating longitudinal axis (105) away from the first blade (101); the chamfered surface (106) extends from the top surface of the main cutter (1) to the bottom surface of the main cutter (1), and the chamfered surface (106) forms an acute angle with the inner side surface of the main cutter (1).

7. The tool for hypertrophic myocardial resection according to claim 1, characterized in that: The side cutting knife (3) is in the shape of an arc piece that matches the cross section of the main cutting knife (1), and the third blade (301) is arranged at the long straight side of the arc piece.

8. The tool for hypertrophic myocardial resection according to claim 1, characterized in that: The thickness of the side cutter (3) matches the arc-shaped through groove (103).

9. The tool for hypertrophic myocardial resection according to claim 7, characterized in that: The bottom surface of the side cutting knife (3) is flat, and the top surface is provided with a long inclined surface extending from the third blade (301) to the top of the arc; the thickness of the top of the arc matches the arc-shaped through groove (103).

Images