CN109932247B - Device and method for detecting biomechanical properties of aortic dissection lesion blood vessel - Google Patents
Device and method for detecting biomechanical properties of aortic dissection lesion blood vessel Download PDFInfo
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- 230000003902 lesion Effects 0.000 title claims abstract description 87
- 210000004204 blood vessel Anatomy 0.000 title claims abstract description 43
- 208000002251 Dissecting Aneurysm Diseases 0.000 title claims abstract description 34
- 206010002895 aortic dissection Diseases 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 95
- 238000012360 testing method Methods 0.000 claims abstract description 27
- 230000000149 penetrating effect Effects 0.000 claims abstract description 21
- 230000002146 bilateral effect Effects 0.000 claims abstract description 12
- 238000006073 displacement reaction Methods 0.000 claims description 54
- 230000002792 vascular Effects 0.000 claims description 48
- 238000011896 sensitive detection Methods 0.000 claims description 38
- 230000036285 pathological change Effects 0.000 claims description 22
- 231100000915 pathological change Toxicity 0.000 claims description 22
- 238000004891 communication Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 5
- 210000000709 aorta Anatomy 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 abstract description 4
- 230000035515 penetration Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000001356 surgical procedure Methods 0.000 description 8
- 208000032843 Hemorrhage Diseases 0.000 description 5
- 208000034158 bleeding Diseases 0.000 description 5
- 230000000740 bleeding effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 206010051077 Post procedural haemorrhage Diseases 0.000 description 3
- 238000002224 dissection Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000010171 animal model Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000010837 poor prognosis Methods 0.000 description 1
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Abstract
The invention discloses a device and a method for detecting the biomechanical property of an aortic dissection lesion blood vessel, which utilize a device with two tension handles for detecting the biomechanical property of the lesion blood vessel, and the device comprises the steps of testing bilateral tensile strain and corresponding stress and testing cutting stress of a penetrating suture on a lesion blood vessel wall material caused by traction when detecting the biomechanical property of the aortic dissection lesion blood vessel. According to the invention, the biomechanical properties of the aortic wall of the interlayer lesion are detected and recorded by testing the bilateral tensile strain and the corresponding stress of the lesion vessel wall material and the cutting stress of the penetration suture, which are generated by traction, on the lesion vessel wall material, and accurate and effective guiding data are provided for doctors; thus, accurate implementation parameters are provided for the operation process of the aortic wall with the lesion interlayer, and the operation risk is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of biological material performance test, and particularly relates to a device and a method for detecting biomechanical properties of aortic dissection lesion blood vessels.
Background
Stanford a aortic dissection is a critical condition of cardiac macrovascular surgery, and has high mortality and extremely poor prognosis (50% within 48 hours and 90% within 3 months) if no active surgical treatment is performed. For Stanford type a aortic dissection, surgical treatment has been internationally accepted as the most effective clinical approach. In the case of performing Stanford type a aortic dissection surgical procedure, some operators found that when standard sutures are used to suture the free edges of the aorta during Stanford type a aortic dissection surgical procedure, the tensile stress generated during the process of stretching the free edges of the blood vessel to the opposite sides by the sutures and the cutting stress generated at the contact point with the wall of the blood vessel after the small diameter sutures penetrate the blood vessel often lead to the occurrence of bleeding phenomenon, and can cause unexpected postoperative bleeding. Under the influence of bleeding in operations and bleeding after operations with different degrees, the death rate in the Stanford A aortic dissection surgery operation can reach 25 percent, and the prognosis of the operation is poor.
The main reason is that the aortic dissection lesion causes the tissue structure change and the biomechanical property change of the vessel wall, which are important reasons for increasing the brittleness and reducing the toughness of the vessel wall. In order to practically reduce the bleeding risk and postoperative bleeding risk caused by the change of the biomechanical properties of the aortic wall in the Stanford A aortic dissection surgery, the specific change of the biomechanical properties of the aortic wall in the pathological state is explored.
In the existing research, specific reasons for triggering the biomechanical property of aortic dissection are explored at multiple angles through different modes such as animal model establishment or clinical research, and certain achievements are obtained. However, there are no devices and methods for detecting and recording specific biomechanics of aortic wall of dissection lesions, and the biomechanics of aortic wall cannot be measured effectively.
Disclosure of Invention
In order to solve the problems, the invention provides a device and a method for detecting the biomechanical property of an aortic dissection lesion vessel, which are used for detecting and recording the biomechanical property of the aortic dissection lesion vessel wall by testing the bilateral tensile strain and the corresponding stress of the lesion vessel wall material and the cutting stress of a penetrating suture, which is generated on the vessel wall due to traction, so as to provide accurate and effective guiding data for doctors; thus, accurate implementation parameters are provided for the operation process of the aortic wall with the lesion interlayer, and the operation risk is greatly reduced.
In order to achieve the above purpose, the invention adopts the following technical scheme: the method for detecting the biomechanical property of the aortic dissection lesion blood vessel comprises the steps of testing bilateral tensile strain and corresponding stress and testing cutting stress generated on the blood vessel wall by a penetrating suture due to traction when the biomechanical property of the aortic dissection lesion blood vessel is detected by using a detection device with two tension handles for detecting the biomechanical property of the aortic dissection lesion blood vessel;
when testing the double-side tensile strain and the corresponding stress, the method comprises the following steps:
s101, respectively clamping two ends of a lesion vessel wall material between two tension handles:
s102, respectively moving and stretching two tension handles to two ends, and generating stretching strain and corresponding stress on a lesion blood vessel wall material;
s103, obtaining a tensile stress value of the lesion vascular wall material by using the tensile force values measured on the two tensile force handles before the lesion vascular wall material is broken; obtaining a tensile strain value of a lesion vascular wall material by detecting the relative displacement of the two tension handles;
in testing the cutting stress on the vessel wall caused by traction of a penetrating suture, comprising the steps of:
s201, vertically penetrating the operation suture through the lesion vascular wall material, and respectively clamping the two ends of the operation suture at the same distance from the lesion vascular wall material by using two tension handles;
s202, placing two tension handles in parallel;
s203, respectively dragging and moving the two tension handles to two sides;
s204, measuring the tension values of the two tension handles, the displacement of the two tension handles and the included angle between the operation suture after traction and the pathological change vascular wall material, and obtaining the horizontal stress, the vertical stress and the strain of the pathological change vascular wall material.
Further, according to the principle of balance of two forces, the two tension forces in the lesion blood vessel wall material facing opposite directions are equal to each other and equal to the tension force between the two tension handles, and the tension force value measured by the two tension handles is the tensile stress value of the lesion blood vessel wall material; the pulling directions of the two pulling handles are horizontal, the displacement of the two pulling handles is equal to the stretching length of the lesion blood vessel wall material in value, and the stretching strain value of the lesion blood vessel wall material is obtained by detecting the relative displacement value of the two pulling handles.
Further, at the time of the test of double-sided tensile strain and corresponding stress: and drawing a stress and strain relation curve of the diseased aorta under the action of bilateral symmetrical pulling force according to the obtained tensile stress value and tensile strain value of the diseased vessel wall material.
Further, in testing the cutting stress of the penetrating suture against the diseased vessel wall material due to traction:
when the stress value is obtained, the acting force of the tension handle on the pathological change vascular wall material in the horizontal direction is the tension of the pathological change vascular wall material in the horizontal direction and is a measured value of the tension handle through a force decomposition rule and a two-force balance rule; the acting force of the tension handle on the pathological change vascular wall material in the vertical direction is the tension of the pathological change vascular wall material in the vertical direction, and is the product of the measured value of the tension handle and the tangent value of the included angle between the surgical suture and the pathological change vascular wall material;
when the strain value is obtained, the strain value of the pathological change vascular wall material in the horizontal direction is the displacement value of the tension handle; the strain value of the lesion vascular wall material in the vertical direction is the product of the displacement value of the tension handle and the tangent value of the included angle between the surgical suture and the lesion vascular wall material.
Further, when the cutting stress of the penetrating suture on the lesion vascular wall material caused by traction is tested, a relation curve between the horizontal stress and the vertical stress and the strain values of each direction is drawn according to the obtained horizontal stress value, the vertical stress value and the strain value of the strain vascular wall material.
On the other hand, in order to match the detection method, based on the same thought of the invention, the invention also provides a detection device for the biomechanical property of the aortic dissection lesion blood vessel, which comprises a sensitive tension meter, a displacement measurer and an angle measurer;
the sensitive tension meter comprises a tension handle I, a tension handle II, a force sensitive detection device I, a force sensitive detection device II and a central controller; one end of the tension handle I is provided with a clamp I, one end of the tension handle II is provided with a clamp II, and the clamp I corresponds to the clamp II; a force-sensitive detection device I is arranged in the tension handle I, and the induction end of the force-sensitive detection device I is connected to the clamp I; a force-sensitive detection device II is arranged in the tension handle II, and the induction end of the force-sensitive detection device II is connected to the clamp II; the signal ends of the force-sensitive detection device I and the force-sensitive detection device II are connected to the central controller through lines;
the displacement measurer is arranged in a space area below the tension handle I and the tension handle II, and a signal end of the displacement measurer is electrically connected with the central controller and is used for measuring displacement values of the tension handle I and the tension handle II;
the angle measurer is arranged in the area below the middle of the clamp I and the clamp II opposite to each other, and the signal end of the angle measurer is electrically connected with the central controller and is used for measuring the included angle between the surgical suture clamped in the clamp I and the clamp II and the lesion vessel wall material.
Further, the device also comprises a surgical suture, when the cutting stress of the test penetrating suture on the blood vessel wall caused by traction is measured, the surgical suture penetrates through the lesion blood vessel wall material, two ends of the surgical suture are clamped by a clamp I and a clamp II respectively at the same distance from the vessel wall, so that the two pulling handles are parallel to each other, and the included angle of the two pulling handles on the horizontal plane is 0 degrees for traction.
The device comprises a base plate, wherein the base plate is provided with a displacement measurer and an angle measurer, the angle measurer is arranged at the center of the base plate, and displacement measurers are respectively arranged at two sides of the angle measurer; the tension handle I and the tension handle II are arranged above the displacement measurer; placing the junction of the surgical suture and the diseased vessel wall material over the angle measurer; the displacement measurer and the angle measurer are electrically connected with the central controller.
Further, the displacement measurer is a laser displacement sensor, detects displacement values of the force handle I and the tension handle II, and feeds back the displacement values to the central controller; the angle measurer is a laser angle sensor, detects an included angle generated between the surgical suture and the pathological change vascular wall material, and feeds back an angle value to the central controller; the force-sensitive detection device I and the force-sensitive detection device II adopt a tension sensor made of force-sensitive materials.
Further, the central controller comprises a processor, a display and a communication interface, wherein the display and the communication interface are connected to the processor, and the processor is respectively connected with signal output ends of a force-sensitive detection device I and a force-sensitive detection device II.
The beneficial effect of adopting this technical scheme is:
in the invention, the blood vessel wall of the aortic lesion is taken as a material, and the biomechanical property of the aortic vessel wall interlayer of the lesion is detected; the biomechanical property of the aortic wall is detected efficiently by detecting the bilateral tensile stress of the wall and the cutting stress caused by suture penetration traction; simultaneously detecting the tolerance condition of the pipe wall to cutting strain caused by bilateral tensile stress and suture penetration traction; detecting and recording the biomechanical properties of the aortic wall of the dissection lesion, and providing accurate and effective biomechanical property guidance data of aortic wall dissection for doctors; provides accurate implementation parameters for clinical operation, greatly reduces operation risk, and reduces bleeding and postoperative bleeding risk caused by the change of the biomechanical properties of the tube wall in Stanford A-type aortic dissection surgery.
Drawings
FIG. 1 is a flow chart of a method for detecting biomechanical properties of aortic dissection lesion blood vessels according to the invention;
FIG. 2 is a schematic diagram of testing tensile strain and corresponding stress on both sides according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a test of the cutting stress on the vessel wall caused by traction of a penetrating suture according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a device for detecting biomechanical properties of aortic dissection lesion vessels according to the present invention;
FIG. 5 is a schematic view of a bottom plate according to an embodiment of the present invention;
FIG. 6 is a diagram showing a circuit connection relationship of a central controller according to an embodiment of the present invention;
wherein, 1 is pulling handle I, 2 is pulling handle II, 3 is force sensitive detection device I, 4 is force sensitive detection device II, 5 is anchor clamps I, 6 is anchor clamps II, 7 is the well accuse ware, 8 is the displacement caliber, 9 is the angle caliber, 10 is the operation suture, 11 is pathological change vascular wall material, 12 is the bottom plate.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
In this embodiment, referring to fig. 1-3, the invention provides a method for detecting biomechanical properties of aortic dissection diseased vessels, which uses a device for detecting biomechanical properties of aortic dissection diseased vessels with two tension handles, and includes testing bilateral tensile strain and corresponding stress and testing cutting stress of a penetrating suture on vessel walls due to traction when detecting biomechanical properties of aortic dissection diseased vessels;
when testing the double-side tensile strain and the corresponding stress, the method comprises the following steps:
s101, respectively clamping two ends of the lesion vessel wall material 11 between two tension handles:
s102, respectively moving and stretching the two tension handles towards two ends, and generating tensile strain and corresponding stress on the lesion vessel wall material 11;
s103, obtaining a tensile stress value of the lesion vessel wall material 11 by using the tensile force values measured on the two tensile force handles before the lesion vessel wall material 11 is broken; obtaining a tensile strain value of the lesion vessel wall material 11 by detecting the relative displacement of the two tension handles;
in testing the cutting stress on the vessel wall caused by traction of a penetrating suture, comprising the steps of:
s201, the operation suture line 10 vertically penetrates through the lesion vascular wall material 11, and two pulling force handles are used for clamping the two ends of the operation suture line 10 at the same distance from the lesion vascular wall material 11;
s202, placing two tension handles in parallel;
s203, respectively dragging and moving the two tension handles to two sides;
s204, the stress and strain of the pathological change vascular wall material 11 in the horizontal direction and the vertical direction are obtained by measuring the pulling force values of the two pulling force handles, the displacement of the two pulling force handles and the included angle between the pulled operation suture 10 and the pathological change vascular wall material 11.
As an optimization scheme of the above embodiment, according to the principle of two-force balance, two tensile forces in the diseased vessel wall material 11 facing opposite directions are equal to each other and are equal to each other, and the tensile force value measured by the two tensile force handles is the tensile stress value of the diseased vessel wall material 11; the pulling directions of the two pulling handles are horizontal, the displacement of the two pulling handles is equal to the length of the lesion blood vessel wall material 11 in value, and the relative displacement value of the two pulling handles is detected to be the tensile strain value of the lesion blood vessel wall material 11.
When testing the double-sided tensile strain and corresponding stress: according to the obtained tensile stress value and tensile strain value of the lesion vascular wall material 11, drawing a stress and strain relation curve of the lesion aorta under the action of bilateral symmetrical tension; the curve is directly displayed, so that the medical staff can more intuitively obtain the measurement data.
As an optimization of the above embodiment, when testing the cutting stress generated by the penetrating suture to the diseased vessel wall material 11 due to traction:
when the stress value is obtained, the acting force of the tension handle on the lesion vascular wall material 11 in the horizontal direction is the tension of the lesion vascular wall material 11 in the horizontal direction and is a measured value of the tension handle through a force decomposition rule and a two-force balance rule; the acting force of the tension handle on the lesion vascular wall material 11 in the vertical direction is the tension of the lesion vascular wall material 11 in the vertical direction, and is the product of the measured value of the tension handle and the tangent value of the included angle between the surgical suture 10 and the lesion vascular wall material 11;
when the strain value is obtained, the strain value of the lesion vessel wall material 11 in the horizontal direction is a displacement value of the tension handle; the strain value of the diseased vessel wall material 11 in the vertical direction is the product of the displacement value of the tension handle and the tangent value of the included angle between the surgical suture 10 and the diseased vessel wall material 11.
When testing the cutting stress generated on the lesion vascular wall material 11 by traction of the penetrating suture, drawing a relation curve between the horizontal stress and the vertical stress and the strain values according to the obtained horizontal stress value, the vertical stress value and the strain value of the strain vascular wall material; the curve is directly displayed, so that the medical staff can more intuitively obtain the measurement data.
In order to cooperate with the implementation of the method of the invention, based on the same inventive concept, as shown in fig. 4-6, the invention also provides a detection device for the biomechanical properties of aortic dissection lesion blood vessels, which comprises a sensitive tension meter, a displacement measurer 8 and an angle measurer 9;
the sensitive tension meter comprises a tension handle I1, a tension handle II 2, a force sensitive detection device I3, a force sensitive detection device II 4 and a central controller 7; a clamp I5 is arranged at one end of the tension handle I1, a clamp II 6 is arranged at one end of the tension handle II 2, and the clamp I5 corresponds to the clamp II 6; a force-sensitive detection device I3 is arranged in the tension handle I1, and the sensing end of the force-sensitive detection device I3 is connected to a clamp I5; a force-sensitive detection device II 4 is arranged in the tension handle II 2, and the induction end of the force-sensitive detection device II 4 is connected to a clamp II 6; the signal ends of the force-sensitive detection device I3 and the force-sensitive detection device II 4 are connected to the central controller 7 through circuits;
the displacement measurer 8 is arranged in a space area below the tension handle I1 and the tension handle II 2, and a signal end of the displacement measurer 8 is electrically connected with the central controller 7 and is used for measuring displacement values of the tension handle I1 and the tension handle II 2;
the angle measurer 9 is arranged in the area below the middle of the clamp I5 and the clamp II 6, and the signal end of the angle measurer 9 is electrically connected with the central controller 7 and is used for measuring the included angle between the surgical suture 10 clamped in the clamp I5 and the clamp II 6 and the lesion blood vessel wall material 11.
As an optimization scheme of the above embodiment, the surgical suture 10 is further included, when the cutting stress of the test penetrating suture on the vessel wall due to traction is measured, the surgical suture 10 is penetrated through the lesion vessel wall material 11, two ends of the surgical suture 10 are respectively clamped by the clamp i 5 and the clamp ii 6 at the same distance from the vessel wall, so that the two pulling handles are parallel to each other, and the included angle is 0 ° on the horizontal plane for traction.
As an optimization scheme of the above embodiment, as shown in fig. 5, the device further comprises a bottom plate 12, a displacement measurer 8 and an angle measurer 9 are arranged on the bottom plate 12, the angle measurer 9 is arranged at the center of the bottom plate 12, and the displacement measurer 8 are respectively arranged at two sides of the angle measurer 9; the tension handle I1 and the tension handle II 2 are arranged above the displacement measurer 8; placing the junction of the surgical suture 10 and the diseased vessel wall material 11 above the angle measurer 9; the displacement measurer 8 and the angle measurer 9 are electrically connected with the central controller 7.
The displacement measurer 8 is a laser displacement sensor, detects displacement values of the force handle I and the tension handle II 2, and feeds back the displacement values to the central controller 7; the angle measurer 9 is a laser angle sensor, detects an included angle generated between the surgical suture 10 and the lesion vessel wall material 11, and feeds back an angle value to the central controller 7; the force-sensitive detection device I3 and the force-sensitive detection device II 4 adopt a tension sensor made of force-sensitive materials.
The central controller 7 comprises a processor, a display and a communication interface, wherein the display and the communication interface are connected to the processor, and the processor is respectively connected with signal output ends of the force-sensitive detection device I3 and the force-sensitive detection device II 4.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The method for detecting the biomechanical property of the aortic dissection lesion blood vessel is characterized in that a detection device with two tension handles for detecting the biomechanical property of the lesion blood vessel is utilized, and the method comprises the steps of testing bilateral tensile strain and corresponding stress and testing cutting stress generated on the blood vessel wall by a penetrating suture due to traction when detecting the biomechanical property of the aortic dissection lesion blood vessel;
when testing the double-side tensile strain and the corresponding stress, the method comprises the following steps:
s101, respectively clamping two ends of a lesion vessel wall material (11) between two tension handles:
s102, respectively moving and stretching two tension handles to two ends, and generating tensile strain and corresponding stress on a lesion blood vessel wall material (11);
s103, obtaining a tensile stress value of the lesion vessel wall material (11) through the tensile force values measured on the two tensile force handles before the lesion vessel wall material (11) is broken; obtaining a tensile strain value of the lesion vessel wall material (11) by detecting the relative displacement of the two tension handles;
in testing the cutting stress on the vessel wall caused by traction of a penetrating suture, comprising the steps of:
s201, vertically penetrating the operation suture (10) through the lesion vascular wall material (11), and respectively clamping the two ends of the operation suture (10) at the same distance from the lesion vascular wall material (11) by using two tension handles;
s202, placing two tension handles in parallel;
s203, respectively dragging and moving the two tension handles to two sides;
s204, measuring the tension values of the two tension handles, the displacement of the two tension handles and the included angle between the operation suture (10) and the pathological change vascular wall material (11) after traction, and obtaining the sizes of the horizontal stress, the vertical stress and the strain of the pathological change vascular wall material (11);
in testing the cutting stress on the diseased vessel wall material (11) by traction of the penetrating suture:
when the stress value is obtained, the acting force of the tension handle on the pathological change vascular wall material (11) in the horizontal direction is the tension of the pathological change vascular wall material (11) in the horizontal direction and is a measured value of the tension handle through a force decomposition rule and a two-force balance rule; the acting force of the tension handle on the pathological change vascular wall material (11) in the vertical direction is the tension of the pathological change vascular wall material (11) in the vertical direction, and is the product of the measured value of the tension handle and the tangent value of the included angle between the surgical suture (10) and the pathological change vascular wall material (11);
when the strain value is obtained, the strain value of the pathological change vascular wall material (11) in the horizontal direction is a displacement value of the tension handle; the strain value of the pathological change vascular wall material (11) in the vertical direction is the product of the displacement value of the tension handle and the tangent value of the included angle between the surgical suture (10) and the pathological change vascular wall material (11);
when the cutting stress of the penetrating suture on the lesion vascular wall material (11) caused by traction is tested, a relation curve between the horizontal stress and the vertical stress and the strain values of the obtained strained vascular wall material in the horizontal direction is drawn according to the obtained stress value, the obtained stress value in the vertical direction and the obtained strain value.
2. The method for detecting the biomechanical properties of the aortic dissection lesion blood vessel according to claim 1, wherein according to the principle of balance of two forces, the two tensile forces facing opposite directions in the lesion blood vessel wall material (11) are equal in magnitude and equal in magnitude to the tensile force between the two tensile force handles, and the tensile force value measured by the two tensile force handles is the tensile stress value of the lesion blood vessel wall material (11); the pulling directions of the two pulling handles are horizontal, the displacement of the two pulling handles is equal to the elongation length of the lesion blood vessel wall material (11) in value, and the stretching strain value of the lesion blood vessel wall material (11) is obtained by detecting the relative displacement value of the two pulling handles.
3. The method for detecting biomechanical properties of aortic dissection lesion vessels according to claim 2, wherein when testing bilateral tensile strain and corresponding stress: and drawing a stress and strain relation curve of the diseased aorta under the action of bilateral symmetrical pulling force according to the obtained tensile stress value and tensile strain value of the diseased vessel wall material (11).
4. A device for detecting the biomechanical properties of aortic dissection lesion blood vessels, which is characterized by comprising a sensitive tension meter, a displacement measurer (8) and an angle measurer (9) based on the method for detecting the biomechanical properties of aortic dissection lesion blood vessels according to any one of claims 1-3;
the sensitive tension meter comprises a tension handle I (1), a tension handle II (2), a force sensitive detection device I (3), a force sensitive detection device II (4) and a central controller (7); one end of the tension handle I (1) is provided with a clamp I (5), one end of the tension handle II (2) is provided with a clamp II (6), and the clamp I (5) corresponds to the clamp II (6); a force-sensitive detection device I (3) is arranged in the tension handle I (1), and the induction end of the force-sensitive detection device I (3) is connected to the clamp I (5); a force-sensitive detection device II (4) is arranged in the tension handle II (2), and the induction end of the force-sensitive detection device II (4) is connected to a clamp II (6); the signal ends of the force-sensitive detection device I (3) and the force-sensitive detection device II (4) are connected to the central controller (7) through lines;
the displacement measurer (8) is arranged in a space area below the tension handle I (1) and the tension handle II (2), and a signal end of the displacement measurer (8) is electrically connected with the central controller (7);
the angle measurer (9) is arranged in a middle lower area opposite to the clamp I (5) and the clamp II (6), and a signal end of the angle measurer (9) is electrically connected with the central controller (7);
the surgical suture (10) is used for penetrating through a lesion vascular wall material (11) when the cutting stress of the penetrating suture on the vascular wall due to traction is measured and tested, the two ends of the surgical suture (10) are clamped by a clamp I (5) and a clamp II (6) at the same distance from the vascular wall, so that the two tension handles are parallel to each other, and the included angle is 0 degree on the horizontal plane for traction;
the device further comprises a bottom plate (12), wherein a displacement measurer (8) and an angle measurer (9) are arranged on the bottom plate (12), the angle measurer (9) is arranged at the center of the bottom plate (12), and the displacement measurer (8) are respectively arranged at two sides of the angle measurer (9); the tension handle I (1) and the tension handle II (2) are arranged above the displacement measurer (8); placing the junction of the surgical suture (10) and the diseased vessel wall material (11) above the angle measurer (9); the displacement measurer (8) and the angle measurer (9) are electrically connected with the central controller (7).
5. The device for detecting the biomechanical properties of aortic dissection lesion blood vessels according to claim 4, wherein the displacement measurer (8) is a laser displacement sensor, detects displacement values of the force handle I and the tension handle II (2), and feeds back the displacement values to the central controller (7); the angle measurer (9) is a laser angle sensor, detects an included angle generated between the surgical suture (10) and the lesion blood vessel wall material (11), and feeds back an angle value to the central controller (7); the force-sensitive detection device I (3) and the force-sensitive detection device II (4) adopt a tension sensor made of a force-sensitive material.
6. The device for detecting the biomechanical properties of aortic dissection lesion blood vessels according to claim 5, wherein the central controller (7) comprises a processor, a display and a communication interface, wherein the display and the communication interface are connected to the processor, and the processor is respectively connected with signal output ends of a force sensitive detection device I (3) and a force sensitive detection device II (4).
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