CN215814740U - Punching tool for constructing biomaterial aortic dissection model - Google Patents

Abstract

The utility model discloses a punching tool for constructing a biomaterial aortic dissection model, which is in a sheet-shaped long structure, wherein two ends of the punching tool are in smooth arc shapes, one end of the punching tool is a narrow end, the other end of the punching tool is a wide end, the width of a handle body of the punching tool is gradually reduced from the wide end to the narrow end, and the edge thickness of the punching tool is 0.5mm-0.7 mm. Inserting the narrow end of the flushing tool into the first gap of the interlayer, and flushing the top of the aorta to the far end of the aorta, so that the aorta intima-media (aorta intima-media and a small amount of media-media) on the flushing path is torn and separated from the aorta outer wall (aorta media and outer membrane), and the aorta interlayer with the set length and width is manufactured; the gradually widened handle body is beneficial to the enlargement of the false cavity; the thickness of the edge of the punching tool ensures that the punching tool cannot cut the aorta, so that the wall thickness of the dummy cavity is uneven, and the wall thickness of the dummy cavity is ensured to be uniform only in a tearing and separating mode; the narrow end and the wide end of the punch can be inserted into the first cleft of the dissection to construct an aortic dissection false cavity.

Description

Punching tool for constructing biomaterial aortic dissection model

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a punching tool for constructing a biomaterial aortic dissection model.

Background

Aortic disease is the most important class of disease in vascular surgery, and hemodynamic function is a major factor affecting the outcome of aortic disease. At present, the study on the hemodynamic function of the sandwich mainly relies on the blood flow analysis CFD (Computational Fluid Dynamics) in computer simulation, and the hemodynamic parameters related to the disease outcome are evaluated by the computer simulation of the aortic blood flow state. However, the parameters obtained by such computer measurement and calculation methods are difficult to calculate in the body of the patient, and an extracorporeal circulation platform is needed, a circulation pump is used to replace the heart blood pumping function, the blood flow state of the aortic disease is simulated, and the parameters are collected by devices such as a pressure sensor and an ultrasonic flowmeter. The 3D printing silica gel model is different from biological materials, and is a main reason for causing the blood flow analysis data distortion.

The main defects of the existing aorta silica gel model are as follows:

1. the stress of biological tissues cannot be simulated: the blood flow parameter measured by using the model has larger difference with the blood flow parameter in vivo;

2. the silica gel model can not simulate aortic valve, aortic arch diastolic blood flow reserve function is lost, and cardiac cycle blood flow change can not be simulated;

3. the silica gel model needs 3D printing, and the modeling cost is high.

In view of the above, the inventor has developed a method for constructing an aortic dissection model by using an aorta of an isolated mammal, which comprises the steps of turning the aorta inside and outside to expose an aortic intima outside, cutting a first slit with a sharp instrument, separating an aortic intima (the aortic intima and a small amount of adhered intima) from an aortic outer wall (the rest of aortic intima and adventitia), constructing an aortic dissection false cavity, and finally turning the aorta inside and outside again to expose an aortic adventitia outside, thereby completing the aortic dissection construction.

The difficulty of constructing the aortic dissection by adopting the biological material is that after the first split is cut, how to construct the dissection false cavity with uniform wall thickness and controllable shape is a difficulty that the biological material aortic dissection model cannot be applied so far.

The information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a punching tool for constructing an isolated animal aortic dissection model, and aims to solve the technical problems that the construction of a dissection false cavity on a biomaterial in the prior art cannot ensure uniform wall thickness and uncontrollable shape.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a punching tool for constructing a biomaterial aortic dissection model is in a sheet long structure, two ends of the punching tool are in smooth arc shapes, one end of the punching tool is a narrow end, the other end of the punching tool is a wide end, the width of a punching tool handle body is gradually reduced from the wide end to the narrow end, and the edge thickness of the punching tool is 0.5mm-0.7 mm.

Further, the thickness of the middle part to the edge of the punching tool is gradually thinned.

Furthermore, the stamping tool is provided with scale marks along the length direction.

Furthermore, the narrow end is provided with the flat hook type towards the top of bending into the hook, the inboard of flat hook type towards the top is provided with the interior bend that can hold the branch road artery, and the tip that the flat hook type towards the top is glossy arc.

Furthermore, a second punching and ejecting head extending transversely is arranged on the handle body below the flat hook type punching and ejecting head, and an opening for a branch artery to enter the inner bend of the flat hook type punching and ejecting head is reserved between the flat hook type punching and ejecting head and the second punching and ejecting head.

Furthermore, a smooth chamfer is arranged at the joint of the second punch and the handle body.

The utility model has the advantages that:

inserting the narrow end of the punching tool into the first split of the interlayer, and punching the top of the aorta to the far end of the aorta, so that the aorta inner membrane on the top punching path is torn and separated from the aorta outer wall, and the aorta interlayer with the set length and width is manufactured; the gradually widened handle body is beneficial to the enlargement of the false cavity; the thickness of the edge of the punching tool ensures that the punching tool cannot cut the aorta, so that the wall thickness of the dummy cavity is uneven, and the wall thickness of the dummy cavity is ensured to be uniform only in a tearing and separating mode; the narrow end and the wide end of the punch can be inserted into the first cleft of the dissection to construct an aortic dissection false cavity.

The thickness change from the middle part to the edge of the punching tool is beneficial to increasing the tearing angle between the inner membrane and the outer wall of the aorta, so that the punching tool can more smoothly construct a false cavity.

The scale on the punch can facilitate the operator to measure the build length of the false chamber.

The punching tool with the flat hook type punching head can construct a false cavity to penetrate through an aorta interlayer at the root part of a branch artery connected with an aorta;

the punching tool with the flat hook type punching head and the second punching head can more conveniently construct an aorta interlayer of which a false cavity penetrates through the root part of a branch artery connected with an aorta.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of a first embodiment of a punch of the present invention;

FIG. 2 is a schematic view of a second embodiment of the punch of the present invention;

FIG. 3 is a schematic view of a third embodiment of the punch of the present invention;

FIG. 4 is a schematic view of a fourth embodiment of a punch of the present invention;

in the figure, 1 punch, 2 handle, 3 narrow end, 4 wide end, 5 scale marks, 6 flat hook type punch heads, 7 inward bends, 8 branch arteries, 9 second punch heads, 10 openings and 11 chamfers.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

Example 1

Referring to fig. 1, which shows a first embodiment of the punching tool for constructing a biomaterial aortic dissection model according to the present invention, the punching tool 1 in this embodiment is made of a metal material, and has an overall sheet-shaped long structure, two ends of the handle 2 are rounded, an upper end in the drawing is a narrow end 3, a lower end is a wide end 4, a width of the handle 2 gradually decreases from the wide end 4 to the narrow end 3, and an edge thickness of the punching tool 1 is 0.5mm-0.7mm, in this embodiment 0.6 mm. The thickness of the punching tool 1 from the middle part to the edge becomes thinner gradually.

When the punching tool 1 of the embodiment is used for constructing the aortic dissection on the aorta of the isolated animal, the narrow end 3 of the punching tool 1 is inserted into the first split of the dissection, and the aortic dissection is punched towards the far end of the aorta, so that the aorta inner membrane on the punching path is torn and separated from the aorta outer wall, and the aortic dissection with the set length and width is manufactured; the width of the interlayer false cavity can be enlarged by replacing the wide end 4 after the first gap of the interlayer is inserted with the narrow end 3 for a set length. The widening stem body 2 contributes to the enlargement of the false cavity; the thickness of the edge of the punching tool 1 ensures that the punching tool 1 cannot cut the aorta, so that the wall thickness of the dummy cavity is uneven, and the wall thickness of the dummy cavity is ensured to be uniform only in a tearing and separating mode; the narrow end 3 and the wide end 4 of the punch 1 can be inserted into the first cleft of the dissection to construct an aortic dissection false cavity.

Example 2

Fig. 2 shows a second specific embodiment of the punch for constructing a biomaterial aortic dissection model according to the present invention, in this embodiment, the structure of the punch 1 is substantially the same as that of embodiment 1, and is not described herein again, but the difference is that the handle 2 of the punch 1 is provided with scale marks 3 along the length direction thereof, and the scale marks on the punch 1 can facilitate an operator to measure the constructed length of the prosthetic chamber at any time.

Example 3

Fig. 3 shows a third embodiment of the punching tool for constructing a biomaterial aortic dissection model according to the present invention, in this embodiment, the structure of the punching tool 1 is substantially the same as that of embodiment 1, and will not be described herein again, except that the narrow end 3 is provided with a flat hook type punch 6 bent into a hook, the inner side of the flat hook type punch 6 is provided with an inward bend 7 capable of accommodating a branch artery 8, and the end of the flat hook type punch 6 is in a smooth arc shape.

When constructing the aortic dissection, the false cavity of the aortic dissection needs to pass through the root part of the connection between the branch artery and the aorta, namely the formed aortic dissection needs to extend from the periphery of the root part of the connection between the branch artery and the aorta to the far end by bypassing the branch artery, when in operation, the punching tool 1 in figure 1 or figure 2 is firstly inserted into the first gap of the dissection, the punching head is pushed towards the far end of the aorta, the aorta intima membrane on the path of the punching head is separated from the aorta outer wall, when the punching head reaches the connection root part of the branch artery and the aorta, the punching tool 1 with the flat hook type punching head 6 in figure 3 is replaced, the branch artery 8 is placed in the inner bend 7 of the flat hook type punching head 6, the flat hook type punching head 6 is used for repeatedly drawing and inserting the punching head, the aorta intima and the aorta intima around the connection root part are separated, and the punching head continues to the far end of the aorta after separation, an aortic dissection with a set length and width is made.

Example 4

Fig. 4 shows a fourth embodiment of a punching tool for constructing a biomaterial aortic dissection model according to the present invention, in this embodiment, the structure of the punching tool 1 is substantially the same as that of embodiment 3, and is not described herein again, but the difference is that a second punching tip 9 extending transversely is disposed on the handle 2 below the flat hook type punching tip 6, and an opening 10 for a branch artery 8 to enter the inner bend of the flat hook type punching tip 6 is left between the flat hook type punching tip 6 and the second punching tip 9. The junction of the second punch 9 and the shank 2 is provided with a smooth chamfer 11.

When in use, the punching tool 1 in fig. 1 or fig. 2 is used for expanding the false cavity of the aortic dissection to one side of the root of the branch artery, the punching tool 1 in the embodiment is replaced, the branch artery 8 is arranged in the inward bend of the flat hook type punching head 6 from the opening 10 between the flat hook type punching head 6 and the second punching head 9 by the punching tool 1, the punching tool 1 is repeatedly inserted, the aorta inner diaphragm around the root is separated from the aorta outer wall, the punching tool 1 in the embodiment can be used for continuously punching towards the aorta distal end after separation, and the punching tool 1 in fig. 1 or fig. 2 can be replaced for continuously punching towards the aorta distal end.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. A punching tool for constructing a biomaterial aortic dissection model is characterized in that the punching tool is of a sheet long structure, two ends of the punching tool are smooth arcs, one end of the punching tool is a narrow end, the other end of the punching tool is a wide end, the width of a handle body of the punching tool is gradually reduced from the wide end to the narrow end, and the edge thickness of the punching tool is 0.5mm-0.7 mm.

2. The punch of claim 1, wherein the thickness of the punch tapers from the center to the edge.

3. The punch of claim 1, wherein the punch is provided with graduations along its length.

4. The punch of claim 1, wherein the narrow end is provided with a flat hook-type punch bent into a hook, the inside of the flat hook-type punch being provided with an inward bend capable of accommodating a branch artery, the end of the flat hook-type punch being smoothly curved.

5. The punch of claim 4 wherein a second punch is provided extending transversely from said shank below said flat hook punch, and an opening is provided between said flat hook punch and said second punch for the branch artery to enter the inturned portion of the flat hook punch.

6. The punch as claimed in claim 5, wherein the junction of the second punch head and the shank is provided with a smooth chamfer.

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