A vascular pressure buffering device

Abstract

The present invention discloses a vascular pressure buffering device, which includes a support grid in a tubular structure, a compensation tube and a buffering part. The compensation tube is sleeved on the inner wall of the support grid. The compensation tube includes an inlet tube and an outlet tube, and the inlet tube and the outlet tube are sleeved inside the support grid at intervals. The buffering part includes a first buffer, a second buffer and an elastic tube. The number of the first buffers is multiple, and multiple first buffers are all arranged on the inner wall of the inlet tube. The second buffer is slidably arranged on the inner wall of the outlet tube. The elastic tube is arranged between the inlet tube and the outlet tube, and one end of the elastic tube is connected to the inlet tube and the other end is connected to the outlet tube. This vascular pressure buffering device implants the support grid into the blood vessel to support the blood vessel wall, and buffers and offsets the pressure brought by the high-pressure blood flow three times through the buffering part, thereby reducing the blood pressure in the high-pressure blood flow, reducing the potential threat brought by hypertension to patients, and ensuring the stability of blood pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary appliances, and particularly relates to a vascular pressure buffering device. Background Art

[0002] Cardiovascular interventional therapy is a new type of technology for diagnosing and treating cardiovascular diseases. Without thoracotomy, under the guidance of imaging methods, through puncturing the surface blood vessels, with the help of certain instruments, the catheter is sent to the lesion site, and the cardiovascular disease is diagnosed and treated through specific catheter operation techniques. It is a relatively advanced method for diagnosing and treating cardiovascular diseases at present;

[0003] When cardiovascular diseases occur, they often cause problems such as narrowing of blood vessel diameters and high blood pressure. In particular, high blood pressure often leads to various diseases. Currently, in the medical field, drug treatment is often adopted to relieve the lesion site in the cerebral blood vessels through drugs, or the way of strengthening immunity, such as strengthening the body's immunity through exercise, and then strengthening the relief of cerebral blood vessel lesions; in addition, corresponding interventional treatment methods are also adopted, such as using vascular stents to support blood vessels to prevent the diameter from narrowing.

[0004] For the above methods, although drug treatment is safe, the treatment cycle is too long and the effect is not obvious; for vascular stents, although the effect is remarkable, the stent may cause thrombus to fall off, or the stent cannot be successfully released, or after some people have stents implanted, due to the reticular and internally unsupported structure of the stent, it may reset and then quickly become blocked again; moreover, the existing stent interventional treatment only simply enlarges the blood vessel passage for blood to pass through, but when the blood pressure is too high and the blood flow speed is too fast, it cannot effectively relieve the situation. Summary of the Invention

[0005] In view of the deficiencies of the existing technology, the present invention provides a vascular pressure buffering device to solve the problems that after cardiovascular diseases occur, it may lead to narrowing of blood vessel diameters and high blood pressure, and when the blood pressure is too high and the blood flow speed is too fast, the existing stent interventional treatment cannot effectively relieve the situation.

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

[0007] A vascular pressure buffering device, comprising:

[0008] A support grid, which is a tubular structure and is used to fixedly support on the wall of the blood vessel;

[0009] A compensation tube, the compensation tube is sleeved on the inner wall of the support grid. The compensation tube includes an inlet tube and an outlet tube, and the inlet tube and the outlet tube are sleeved inside the support grid at intervals; and

[0010] A buffer part, which is arranged inside the compensation pipe. The buffer part includes a first buffer member, a second buffer member and an elastic pipe. The number of the first buffer members is multiple, and multiple first buffer members are all arranged on the inner wall of the inlet pipe. The second buffer member is slidably arranged on the inner wall of the outlet pipe. The elastic pipe is arranged between the inlet pipe and the outlet pipe, and one end of the elastic pipe is connected to the inlet pipe and the other end is connected to the outlet pipe.

[0011] The above-mentioned blood vessel pressure buffer device buffers and cancels the pressure brought by the high-pressure blood flow three times through the buffer part, thereby reducing the blood pressure in the high-pressure blood flow, reducing the potential threat brought by hypertension to patients, and ensuring the stability of blood pressure.

[0012] Further, a liquid inlet is provided at the inlet end of the compensation pipe, and a liquid outlet is provided at the outlet end of the compensation pipe. Both the liquid inlet and the liquid outlet are funnel-shaped structures. The small-diameter end of the liquid inlet is fixedly connected to the inlet end of the compensation pipe, and the small-diameter end of the liquid outlet is fixedly connected to the outlet end of the compensation pipe.

[0013] Further, an extension pipe is further included. The extension pipe is located between the inlet pipe and the outlet pipe and surrounds the outside of the elastic pipe. Through holes are opened in the inner parts of both the inlet pipe and the outlet pipe, and the through holes extend spirally inside the inlet pipe and the outlet pipe. The inlet of the through hole on the inlet pipe penetrates through to the outside of the liquid inlet, and the outlet of the through hole on the outlet pipe penetrates through to the outside of the liquid outlet. One end of the extension pipe communicates with the outlet of the through hole on the inlet pipe, and the other end communicates with the inlet of the through hole on the outlet pipe.

[0014] Further, multiple first buffer members are arranged in a circular array on the inner wall of the inlet pipe. Each first buffer member includes a first buffer plate, a second buffer plate and a fixing plate. The first buffer plate, the second buffer plate and the fixing plate are sequentially arranged at intervals from the inlet to the outlet direction of the inlet pipe. One ends of the first buffer plate and the second buffer plate are both hinged to the inner wall of the inlet pipe, and one end of the fixing plate is fixed to the inner wall of the inlet pipe. Buffer springs are arranged between the first buffer plate and the second buffer plate and between the second buffer plate and the fixing plate.

[0015] Further, the second buffer member includes a buffer membrane and a buffer ring block. A reset groove is opened on the inner wall of the outlet pipe. The buffer ring block is slidably arranged in the reset groove. The outer edge of the buffer membrane is fixedly connected to the inner side surface of the buffer ring block. A reset member is arranged in the reset groove. One end of the reset member is connected to the inner side wall of the reset groove, and the other end is connected to the side surface of the buffer ring block.

[0016] Further, the reset member includes a plurality of reset rods. A plurality of reset holes distributed in an annular array are formed on the inner side wall of the reset groove close to the outlet of the outlet pipe. One ends of the plurality of reset rods are respectively inserted into the plurality of reset holes and are slidably connected. The other ends of the plurality of reset rods are all connected to the side surface of the buffer ring block. Each reset hole is provided with a reset spring. One end of the reset spring is fixedly connected to the inner bottom wall of the reset hole, and the other end is connected to the end of the reset rod located in the reset hole.

[0017] Further, the middle part of the side surface of the buffer membrane bulges outwards to form a funnel shape, and a first through hole is formed at the small-diameter end of the funnel shape. A plurality of second through holes are formed at the side edge of the buffer membrane.

[0018] Further, the elastic tube includes an expansion part and two telescopic parts. The expansion part is arranged between the two telescopic parts and is integrally formed. The expansion part has elasticity in the radial direction, so that the expansion part can expand in its radial direction. The two telescopic parts have elasticity in the axial direction, so that the two telescopic parts can reciprocate in their axial directions.

[0019] The beneficial effects of the present invention: The blood vessel pressure buffer device of the present invention expands the range of high-pressure blood flow entering the inlet pipe through the funnel-shaped design of the liquid inlet, facilitating the entry of high-pressure blood flow; through the arrangement of the extension hole and the extension pipe, the high-pressure blood flow is shunted, so that a part of the high-pressure blood enters the extension hole, increasing the flow distance of the high-pressure blood flow flowing in the extension pipe and the extension hole, reducing the pressure brought by this part of the high-pressure blood flow, while the other part of the high-pressure blood flow flows into the inlet pipe and the outlet pipe, and the pressure brought by the other part of the high-pressure blood flow is buffered and offset three times by the buffer part, thereby reducing the blood pressure in the high-pressure blood flow, reducing the potential threat brought by hypertension to patients, and ensuring the stability of blood pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for the specific embodiments will be briefly introduced below. In all the drawings, the components or parts are not necessarily drawn according to the actual scale.

[0021] Figure 1 It is the front view of the present invention;

[0022] Figure 2 It is the structural schematic diagram of the first buffer member;

[0023] Figure 3 It is the structural schematic diagram after the expansion part expands;

[0024] Figure 4 It is the structural schematic diagram of the second buffer member;

[0025] Figure 5 For Figure 4 The side view of the buffer membrane in the A direction in

[0026] Figure 6 For Figure 4 The enlarged view at position B in

[0027] Reference numerals:

[0028] 10 - Support grid

[0029] 20 - Compensation pipe, 21 - Inlet pipe, 22 - Outlet pipe

[0030] 30 - Buffer section, 31 - First buffer member, 311 - First buffer plate, 312 - Second buffer plate, 313 - Fixed plate, 314 - Buffer spring, 315 - Pressure relief hole, 32 - Elastic tube, 321 - Expansion section, 322 - Telescopic section, 33 - Second buffer member, 331 - Buffer membrane, 332 - Buffer ring block, 333 - Return rod, 334 - Return spring, 335 - Return groove, 336 - Return hole, 337 - First through hole, 338 - Second through hole

[0031] 40 - Liquid inlet, 50 - Liquid outlet, 60 - Extension pipe, 70 - Extension hole Detailed implementation manners

[0032] The embodiments of the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation and positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific manner, and therefore cannot be understood as a limitation to the present invention.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] Please refer to Figure 1, a vascular pressure buffering device provided by the present invention includes a support grid 10, a compensation tube 20, and a buffering part 30. The support grid 10 is a tubular structure for fixedly supporting on the wall of a blood vessel. The compensation tube 20 is sleeved on the inner wall of the support grid 10. The compensation tube 20 includes an inlet tube 21 and an outlet tube 22, and the inlet tube 21 and the outlet tube 22 are spaced and sleeved inside the support grid 10. The buffering part 30 is arranged inside the compensation tube 20. During use, according to the patient's condition, the distance between the inlet tube 21 and the outlet tube 22 inside the support grid 10 is adjusted, and then the device is placed into the blood vessel to support the blood vessel. When high-pressure blood flow in the blood vessel enters the compensation tube 20, the high-pressure blood flow is buffered by the buffering part 30 to offset part of the pressure of the high-pressure blood flow, thereby reducing the blood pressure in the high-pressure blood flow, reducing the potential threat brought by hypertension to the patient, and ensuring the stability of blood pressure.

[0036] The buffering part 30 includes a first buffering member 31, a second buffering member 33, and an elastic tube 32. The number of the first buffering members 31 is multiple, and multiple first buffering members 31 are all arranged on the inner wall of the inlet tube 21. The second buffering member 33 is slidably arranged on the inner wall of the outlet tube 22. The elastic tube 32 is arranged between the inlet tube 21 and the outlet tube 22, and one end of the elastic tube 32 is connected to the inlet tube 21 and the other end is connected to the outlet tube 22.

[0037] Through the arrangement of the first buffering member 31, the high-pressure blood flow entering the inlet tube 21 is buffered to initially offset part of the pressure brought by the high-pressure blood flow. Then the high-pressure blood flow enters the elastic tube 32, and by using the axial reciprocating motion of the elastic tube 32, the part of the pressure brought by the high-pressure blood flow is offset for the second time. Then the high-pressure blood flow will enter the second buffering member 33, and by using the impact of the high-pressure blood flow on the second buffering member 33, the second buffering member 33 is driven to slide in the outlet tube 22 towards its outlet direction. As the high-pressure blood flow impacts and slides on the second buffering member 33, the part of the pressure brought by the high-pressure blood flow is offset for the third time.

[0038] Please refer to Figure 2, specifically, a plurality of first buffer members 31 are arranged in an annular array on the inner wall of the inlet pipe 21. Each of the first buffer members 31 includes a first buffer plate 311, a second buffer plate 312, and a fixing plate 313. The first buffer plate 311, the second buffer plate 312, and the fixing plate 313 are sequentially arranged at intervals from the inlet to the outlet direction of the inlet pipe 21. One ends of the first buffer plate 311 and the second buffer plate 312 are hingedly connected to the inner wall of the inlet pipe 21, and one end of the fixing plate 313 is fixed to the inner wall of the inlet pipe 21. Buffer springs 314 are provided between the first buffer plate 311 and the second buffer plate 312, and between the second buffer plate and the fixing plate 313. Among them, pressure relief holes 315 are provided on the first buffer plate 311, the second buffer plate 312, and the fixing plate 313, facilitating part of the blood to flow through the pressure relief holes 315 to avoid the blood flow being blocked. The free ends of the first buffer plate 311 and the second buffer plate 312 are inclined towards the inlet direction of the inlet pipe 21, facilitating the first buffer plate 311 and the second buffer plate 312 to buffer and offset the pressure brought by the high-pressure blood flow.

[0039] When the high-pressure blood flow enters the inlet pipe 21, the blood near the inner wall of the inlet pipe 21 impacts the first buffer plate 311 and the second buffer plate 312. The flowing blood drives the free ends of the first buffer plate 311 and the second buffer plate 312 to shift towards the outlet direction of the outlet pipe 22, causing the first buffer plate 311 and the second buffer plate 312 to buffer the flow of the high-pressure blood flow during the shifting process, thereby offsetting part of the pressure. At this time, the buffer spring 314 is compressed, and then the first buffer plate 311 and the second buffer plate 312 are reset by using the restoring elastic force of the buffer spring 314.

[0040] Please refer to Figure 3 , the elastic tube 32 includes an expansion part 321 and two telescopic parts 322. The expansion part 321 is arranged between the two telescopic parts 322 and is integrally formed. The expansion part 321 has elasticity in the radial direction, enabling the expansion part 321 to expand in its radial direction. The inner diameter of the expanded expansion part 321 is larger than the outer diameter of the telescopic part 322. The two telescopic parts 322 have elasticity in the axial direction, enabling the two telescopic parts 322 to reciprocate in their axial directions.

[0041] When the high-pressure blood flow enters the elastic tube 32, the pressure brought by the high-pressure blood flow will impact and expand the expansion part 321, so that the expansion part 321 can accommodate more blood volume. Due to the increase in the volume of the expanded expansion part 321, the pressure of the high-pressure blood flow becomes smaller after entering the expansion part 321; and the two telescopic parts 322 can reciprocate in the axial direction, enabling the high-pressure blood flow to offset part of the pressure brought by the blood when passing through, further reducing the pressure brought by the high-pressure blood flow.

[0042] Please refer to Figure 4 , Figure 5 and Figure 6 together. The second buffer member 33 includes a buffer film 331 and a buffer ring block 332. A reset groove 335 is formed on the inner wall of the outlet pipe 22. The buffer ring block 332 is slidably disposed in the reset groove 335. The outer edge of the buffer film 331 is fixedly connected to the inner side surface of the buffer ring block 332. The inner diameter of the buffer ring block 332 is the same as the inner diameter of the outlet pipe 22. A reset member is provided in the reset groove 335. One end of the reset member is connected to the inner side wall of the reset groove 335, and the other end is connected to the side surface of the buffer ring block 332. Among them, the middle part of the side surface of the buffer film 331 bulges outwards to form a funnel shape, and a first through hole 337 is formed at the small-diameter end of the funnel shape. A plurality of second through holes 338 are formed at the side edge of the buffer film 331. The first through hole 337 and the second through holes 338 are provided to reduce the impact force of the blood on the buffer film 331, and the funnel shape design in the middle part of the buffer film 331 is convenient for increasing the contact area between the buffer film 331 and the blood, so as to buffer the flow of the blood.

[0043] When the high-pressure blood flow enters the outlet pipe 22, the high-pressure blood flow impacts on the buffer film 331, driving the buffer film 331 to move towards the outlet direction of the outlet pipe 22. Due to the setting of the reset member, the impact force brought by the high-pressure blood flow pushing the buffer film 331 to move will be offset, thereby alleviating part of the pressure brought by the high-pressure blood flow and reducing the pressure of the blood.

[0044] Preferably, the reset member includes a plurality of reset rods 333. A plurality of reset holes 336 distributed in an annular array are formed on the inner side wall of the reset groove 335 close to the outlet of the outlet pipe 22. One ends of the plurality of reset rods 333 are respectively inserted into the plurality of reset holes 336 and are slidably connected. The other ends of the plurality of reset rods 333 are all connected to the side surface of the buffer ring block 332. Each reset hole 336 is provided with a reset spring 334. One end of the reset spring 334 is fixedly connected to the inner bottom wall of the reset hole 336, and the other end is connected to the end of the reset rod 333 located in the reset hole 336. When the buffer film 331 moves towards the outlet direction of the outlet pipe 22, the buffer ring block 332 slides in the reset groove 335, and then the buffer ring block 332 pushes the reset rod 333, so that the end of the reset rod 333 is inserted deeper into the reset hole 336, and the reset spring 334 is compressed, thereby using the restoring elastic force generated by the reset spring 334 to buffer the movement of the buffer ring block 332.

[0045] As Figure 1As shown in the figure, in this embodiment, the inlet end of the compensation tube 20 is provided with a liquid inlet 40, and the outlet end of the compensation tube 20 is provided with a liquid outlet 50. Both the liquid inlet 40 and the liquid outlet 50 are funnel-shaped structures. The small-diameter end of the liquid inlet 40 is fixedly connected to the inlet end of the compensation tube 20, and the inner diameter of the small-diameter end of the liquid inlet 40 is the same as the inner diameter of the inlet end of the compensation tube 20. The small-diameter end of the liquid outlet 50 is fixedly connected to the outlet end of the compensation tube 20, and the inner diameter of the small-diameter end of the liquid outlet 50 is the same as the inner diameter of the outlet end of the compensation tube 20. The setting of the liquid inlet 40 can prevent the impact of the high-pressure blood flow on the inlet end face of the inlet tube 21 and avoid abrasion of the inlet tube 21. The funnel-shaped design of the liquid inlet 40 enlarges the entry range of the high-pressure blood flow at the large-diameter end of the liquid inlet 40. The funnel-shaped design of the liquid outlet 50 enlarges the outflow range of the high-pressure blood flow at the large-diameter end of the liquid outlet 50.

[0046] In this embodiment, the device further includes an extension tube 60. The extension tube 60 is located between the inlet tube 21 and the outlet tube 22 and surrounds the outside of the elastic tube 32. Through extension holes 70 are formed inside both the inlet tube 21 and the outlet tube 22. The extension holes 70 extend spirally inside the inlet tube 21 and the outlet tube 22. The inlet of the extension hole 70 on the inlet tube 21 penetrates and extends to the outside of the liquid inlet 40, and the outlet of the extension hole 70 of the outlet tube 22 penetrates and extends to the outside of the liquid outlet 50. One end of the extension tube 60 communicates with the outlet of the extension hole 70 on the inlet tube 21, and the other end communicates with the inlet of the extension hole 70 on the outlet tube 22. Among them, the extension tube 60 can be bent so that the extension tube 60 can adjust its position outside the elastic tube 32, and the extension tube 60 will not be flattened after the expansion part 321 expands.

[0047] When the high-pressure blood flow enters the liquid inlet 40, a part of the high-pressure blood flow flows into the extension hole 70, so that this part of the high-pressure blood flow flows through the extension hole 70 of the inlet tube 21, the extension tube 60, and the extension hole 70 of the outlet tube 22 in sequence, and finally flows out from the liquid outlet 50. The spiral arrangement of the extension tube 60 and the extension hole 70 increases the flow distance of part of the high-pressure blood flow inside the extension tube 60 and the extension hole 70, reduces the pressure brought by this part of the high-pressure blood flow, and makes part of the blood of the high-pressure blood flow flow into the extension hole 70, thereby shunting the high-pressure blood flow, so as to weaken the impact pressure of the other part of the high-pressure blood flow on the buffer part 30.

[0048] In this embodiment, according to the patient's condition, the spacing distance between the inlet tube 21 and the outlet tube 22 is adjustable, so that the stretched length of the extension tube 60 can also be changed, changing the flow distance of the blood inside the extension tube 60.

[0049] Working principle of the present invention: During use, according to the patient's condition, adjust the distance between the inlet pipe 21 and the outlet pipe 22, implant this device into the blood vessel, and make the support grid 10 support the blood vessel wall; when the high-pressure blood flow enters the inlet pipe 21 from the liquid inlet 40, a part of the high-pressure blood flow flows into the extension hole 70 of the inlet pipe 21, then flows through the extension pipe 60, and then from the extension hole 70 of the outlet pipe 22; another part of the high-pressure blood flow enters the inlet pipe 21, and the blood near the inner wall of the inlet pipe 21 is buffered by the first buffer plate 311 and the second buffer plate 312, so that the first buffer plate 311 and the second buffer plate 312 offset part of the pressure of the high-pressure blood flow; then the high-pressure blood flow enters the elastic tube 32, and the radial expansion of the expansion part 321 expands the volume, enabling it to accommodate a larger blood volume, thereby reducing part of the pressure brought by the high-pressure blood flow, and the axial reciprocating movement of the two telescopic parts 322 further reduces part of the pressure brought by the high-pressure blood flow; when the high-pressure blood flow enters the outlet pipe 22, the impact of the high-pressure blood flow on the buffer membrane 331 drives the movement of the buffer membrane 331, and uses the restoring force of the return spring 334 to weaken the impact force of the high-pressure blood flow, and finally the high-pressure blood flow with reduced pressure flows out of the liquid outlet 50.

[0050] Advantages of the present invention: The blood vessel pressure buffer device of the present invention expands the range of high-pressure blood flow entering the inlet pipe 21 through the funnel-shaped design of the liquid inlet 40, facilitating the entry of high-pressure blood flow; through the arrangement of the extension hole 70 and the extension pipe 60, the high-pressure blood flow is shunted, so that a part of the high-pressure blood enters the extension hole 70, increasing the flow distance of the high-pressure blood flow flowing in the extension pipe 60 and the extension hole 70, reducing the pressure brought by this part of the high-pressure blood flow, and the other part of the high-pressure blood flow flows into the inlet pipe 21 and the outlet pipe 22, and the pressure brought by the other part of the high-pressure blood flow is buffered and offset three times by the buffer part 30, thereby reducing the blood pressure in the high-pressure blood flow, reducing the potential threat brought by hypertension to the patient, and ensuring the stability of blood pressure.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A vascular pressure buffer device, characterized in that, Comprising: A support grid, which is a tubular structure and is used to fixedly support on the wall of a blood vessel; A compensating tube, the compensating tube is sleeved on the inner wall of the support grid, the compensating tube includes an inlet tube and an outlet tube, and the inlet tube and the outlet tube are sleeved inside the support grid at intervals; and A buffer part, the buffer part is arranged inside the compensating tube, the buffer part includes a first buffer member, a second buffer member and an elastic tube, the number of the first buffer members is multiple, and multiple first buffer members are all arranged on the inner wall of the inlet tube, the second buffer member is slidably arranged on the inner wall of the outlet tube, the elastic tube is arranged between the inlet tube and the outlet tube, and one end of the elastic tube is connected to the inlet tube and the other end is connected to the outlet tube; The inlet end of the compensating tube is provided with a liquid inlet, the outlet end of the compensating tube is provided with a liquid outlet, both the liquid inlet and the liquid outlet are in a funnel-shaped structure, the small-diameter end of the liquid inlet is fixedly connected to the inlet end of the compensating tube, and the small-diameter end of the liquid outlet is fixedly connected to the outlet end of the compensating tube; It further includes an extension tube, the extension tube is located between the inlet tube and the outlet tube, and the extension tube surrounds the outside of the elastic tube. Through holes are opened in the inner parts of both the inlet tube and the outlet tube, and the through holes extend spirally inside the inlet tube and the outlet tube. The inlet of the through hole on the inlet tube penetrates through to the outside of the liquid inlet, and the outlet of the through hole on the outlet tube penetrates through to the outside of the liquid outlet. One end of the extension tube communicates with the outlet of the through hole on the inlet tube, and the other end communicates with the inlet of the through hole on the outlet tube; Multiple first buffer members are arranged in an annular array on the inner wall of the inlet tube. Each first buffer member includes a first buffer plate, a second buffer plate and a fixing plate. The first buffer plate, the second buffer plate and the fixing plate are sequentially arranged at intervals from the inlet to the outlet direction of the inlet tube. One ends of the first buffer plate and the second buffer plate are hinged and connected to the inner wall of the inlet tube, one end of the fixing plate is fixedly connected to the inner wall of the inlet tube, and buffer springs are arranged between the first buffer plate and the second buffer plate and between the second buffer plate and the fixing plate.

2. The vascular pressure buffer device according to claim 1, characterized in that: The second buffer member includes a buffer membrane and a buffer ring block. A reset groove is opened on the inner wall of the outlet tube, the buffer ring block is slidably arranged in the reset groove, the outer edge of the buffer membrane is fixedly connected to the inner side surface of the buffer ring block, and a reset member is arranged in the reset groove. One end of the reset member is connected to the inner side wall of the reset groove, and the other end is connected to the side surface of the buffer ring block.

3. The vascular pressure buffer device according to claim 2, characterized in that: The reset member includes multiple reset rods. Multiple reset holes distributed in an annular array are opened on the inner side wall of the reset groove close to the outlet of the outlet tube. One ends of the multiple reset rods are respectively inserted into the multiple reset holes and are slidably connected. The other ends of the multiple reset rods are all connected to the side surface of the buffer ring block. Each reset hole is provided with a reset spring. One end of the reset spring is fixedly connected to the inner bottom wall of the reset hole, and the other end is connected to the end of the reset rod located in the reset hole.

4. The vascular pressure buffer device according to claim 2, characterized in that: The middle part of the side surface of the buffer membrane bulges outwards to form a funnel shape, and a first through hole is opened at the small-diameter end of the funnel shape. Multiple second through holes are opened at the side edge of the buffer membrane.

5. The vascular pressure buffer device according to claim 2, characterized in that: The elastic tube includes an expansion portion and two telescopic portions. The expansion portion is disposed between the two telescopic portions and integrally formed. The expansion portion has elasticity in the radial direction, such that the expansion portion can expand in its radial direction. The two telescopic portions have elasticity in the axial direction, such that the two telescopic portions can reciprocate in their axial directions.

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