Blood vessel pressurizing device

Abstract

The utility model provides a blood vessel pressurizing device, which relates to the field of medical instruments and comprises a plurality of pressurizing strips and end tightening components respectively arranged at two ends of the pressurizing strips in the length direction. The plurality of pressurizing strips are arranged in parallel in pairs at intervals to form a pressurizing main body; the two ends of the pressurizing body in the axial direction are connected with end pressing blocks respectively, and the end pressing blocks are provided with internal channels. The end tightening assembly comprises a tightening strip and a compression spring. The tightening strip is in a chain shape formed by connecting multiple conical units in series in the same direction. At any end in the axial direction of the pressurizing body, the first end of the tightening strip is fixedly connected to one end pressing block, and the second end of the tightening strip sequentially penetrates through the internal channels of the other end pressing blocks; a compression spring is arranged outside the part, between any two adjacent end pressing blocks, of the tightening strip in a sleeving manner; and an elastic locking structure is also arranged in an internal channel of the end part pressing block which is at least fixedly connected with the tightening strip. The aorta pressurizing device is used for pressurizing the outer wall of the aorta and enhancing the strength of aorta blood vessels.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, and in particular to a vascular pressure device. Background Technology

[0002] Aortic dissection is often accompanied by at least two tears, one proximal and one distal. Current techniques for endovascular repair of aortic dissection typically only seal the proximal tear. However, if the false lumen fails to embolize properly post-operatively, blood will reflux from the distal tear into the false lumen, causing the dissection to continue to expand until it eventually ruptures. Furthermore, when the proximal and distal tears are far apart, aortic stent grafts cannot seal the distal tear. Current techniques address this by breaking the intima between the proximal and distal tears, creating a complete connection between the true and false lumens, thereby breaking the dissection and establishing a new anchoring zone for the stent graft.

[0003] However, after the intima between the true and false lumens is broken, the aortic wall becomes thinner. This means that the side of the vessel wall closest to the false lumen loses its intima, leaving only the media and the outer wall. This leads to a decrease in the overall strength of the vessel wall, making it more susceptible to aneurysm formation under continuous blood flow. Utility Model Content

[0004] The purpose of this invention is to provide a vascular pressure device for pressurizing the outer wall of the aorta, thereby enhancing the strength of the aorta and alleviating the aforementioned technical problems.

[0005] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0006] This utility model provides a vascular compression device, including a plurality of compression bars and end tightening components respectively disposed at both ends of the plurality of compression bars along their length;

[0007] Multiple pressure strips are arranged in parallel intervals to form a pressure body; each end of the pressure body is connected to an end pressure block at both ends along the axial direction, and the end pressure block has an internal channel that passes through the end pressure block.

[0008] The end tightening assembly includes a tightening bar and multiple compression springs;

[0009] The tightening bar is formed by multiple tapered units connected in the same direction to form a chain. The large diameter end of each tapered unit faces the first end of the tightening bar, and the small diameter end of each tapered unit faces the second end of the tightening bar.

[0010] At any end along the axial direction of the pressurizing body:

[0011] The first end of the tightening strip is fixedly connected to one of the end pressure blocks, and the second end of the tightening strip passes through the internal channels of the remaining end pressure blocks in sequence; a compression spring is sleeved on the outside of the portion of the tightening strip between any two adjacent end pressure blocks, one end of the compression spring abuts against one end pressure block and the other end abuts against another end pressure block;

[0012] At least the end pressure block fixedly connected to the tightening strip is provided with an elastic locking structure in its internal channel. In the assembled state, the second end of the tightening strip overcomes the elastic force of the elastic locking structure and passes through the internal channel of the end pressure block fixedly connected to the tightening strip, so that the end pressure blocks of the multiple pressure strips are arranged in a ring structure at intervals. The elastic locking structure always has the tendency to abut against the end face of the large diameter end of any of the tapered units to lock the springback of the tightening strip in one direction.

[0013] In this embodiment, optionally, at any end along the axial direction of the pressurizing body: in the assembled state, the radial direction of the annular structure formed by the spaced end blocks of the plurality of pressurizing bars is the thickness direction of each end block; the surface of the end block facing outward from the annular structure in the thickness direction is the outer surface of the end block in the thickness direction; and the circumferential direction of the annular structure is the width direction of each end block.

[0014] The internal channel of the end block, which is fixedly connected to the first end of the tightening strip, passes through one side surface of the end block in the width direction and the other end passes through the outer side surface of the end block in the thickness direction. The first end of the tightening strip is fixedly connected to the other side surface of the end block in the width direction. The two ends of the internal channels of the remaining end blocks pass through the two sides of the end block in the width direction, respectively.

[0015] In this embodiment, optionally, the end block with an elastic locking structure in the internal channel is used as the locking block; the locking block is also provided with a mounting hole communicating with its internal channel.

[0016] The elastic locking structure is installed inside the mounting hole and includes a plug, a locking spring, and a locking block. One end of the locking spring is fixedly connected to the plug, and the other end of the locking spring is fixedly connected to the locking block. The plug faces the outside of the end pressure block and is interference-fitted with the wall of the mounting hole. The locking block faces the internal channel, and part of the locking block extends into the internal channel.

[0017] Alternatively, the end face of the locking block away from the locking spring has a guide slope that matches the outer surface of the tapered unit.

[0018] In this embodiment, optionally, each of the end pressure blocks has the same size.

[0019] In this embodiment, optionally, the spacing between any two adjacent end blocks is the same.

[0020] In this embodiment, optionally, the compression springs between each pair of adjacent end blocks have the same size and stiffness.

[0021] In this embodiment, optionally, the second end of the tightening strip is also connected to a pulling member.

[0022] Further optionally, the pulling member includes an end connecting block fixedly connected to the second end of the tightening bar.

[0023] Alternatively, the pulling member may further include a pull ring that passes through a hole in the end connecting block.

[0024] Compared to existing technologies, this utility model embodiment can be applied to aortic dissection treatment surgery, protecting the outer wall of the blood vessel and enhancing its strength. After the intima between the true and false lumens is broken, the aortic wall becomes thinner, meaning that the blood vessel wall on the side closest to the false lumen has lost its intima, leaving only the media and the outer wall. This prevents the blood vessel that has lost its intima from developing aneurysms and other lesions due to decreased strength. In addition, the axial ends of the pressure-applying body in this utility model embodiment can be adjusted independently, thus adapting to blood vessels of different shapes and sizes to accommodate the blood vessel sizes of different patients. For the usage method and structural principle of this utility model embodiment, please refer to the relevant description in the detailed implementation section of this specification. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 An unfolded view of the overall structure of the vascular compression device provided in this embodiment of the utility model, with the second end of the tightening strip not assembled to the end pressure block;

[0027] Figure 2 Axonometric view of the overall structure of the vascular compression device provided in this embodiment of the present invention, with the second end of the tightening strip assembled with the end pressure block;

[0028] Figure 3 The vascular compression device provided in this embodiment of the utility model is Figure 2 Top view of the overall structure in its assembled state;

[0029] Figure 4 This is a schematic diagram of the overall structure of the tightening strip in an embodiment of the present invention;

[0030] Figure 5 This is a half-sectional view of the assembly structure of the tightening strip and the end pressure block without an elastic locking structure in an embodiment of this utility model;

[0031] Figure 6 This is a half-sectional view of the assembly structure of the second end of the tightening strip and the locking block in the end pressure block in an embodiment of the present utility model.

[0032] Icons: 1-Pressure bar; 2-End pressure block; 20-Internal channel; 21-Locking pressure block; 3-Tightening bar; 31-Pull element; 311-End connecting block; 312-Pull ring; 4-Compression spring; 5-Elastic locking structure; 51-Plug; 52-Locking spring; 53-Locking block; 530-Guide slope. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] It should be noted that similar labels and letters in the accompanying drawings indicate similar items. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings.

[0036] In the description of this utility model, it should be noted that:

[0037] Unless otherwise expressly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The terms “axial,” “radial,” “inner,” “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this utility model is usually placed during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and optional embodiments can be combined with each other.

[0040] This embodiment provides a vascular compression device, referring to... Figures 1 to 6 The vascular compression device includes multiple compression bars 1 and end tightening assemblies located at both ends along the length of the compression bars 1. The compression bars 1 are arranged in pairs, parallel to each other, to form a compression body. End pressure blocks 2 are connected to both ends of the compression body along its axial direction. Each end pressure block 2 has an internal channel 20 that passes through it. The end tightening assembly includes a tightening bar 3 and multiple compression springs 4. The tightening bar 3 is composed of multiple tapered units connected in the same direction to form a chain. The large-diameter end of each tapered unit faces the first end of the tightening bar 3, and the small-diameter end of each tapered unit faces the second end of the tightening bar 3. At any end along the axial direction of the pressurizing body: the first end of the tightening strip 3 is fixedly connected to an end pressure block 2, and the second end of the tightening strip 3 passes through the internal channels 20 of each of the remaining end pressure blocks 2 in sequence; a compression spring 4 is sleeved on the outside of any two adjacent end pressure blocks 2 of the tightening strip 3, and one end of the compression spring 4 between any two adjacent end pressure blocks 2 abuts against one end pressure block 2 and the other end abuts against the other end pressure block 2; among these end pressure blocks 2, at least the internal channel 20 of the end pressure block 2 fixedly connected to the tightening strip 3 is also provided with an elastic locking structure 5. In the assembled state, the second end of the tightening strip 3 overcomes the elastic force of the elastic locking structure 5 and passes through the internal channel 20 of the end pressure block 2 fixedly connected to the tightening strip 3, so that the end pressure blocks 2 of the multiple pressurizing strips 1 are arranged in a ring structure at intervals, and the elastic locking structure 5 always has the tendency to abut against the end face of the large diameter end of any conical unit to lock the springback of the tightening strip 3 in one direction.

[0041] It should be specifically explained that: the end pressure block 2 with an elastic locking structure 5 in the internal channel 20 is called the locking pressure block 21, and the end pressure block 2 without the elastic locking structure 5 is called the ordinary pressure block. The following explanation and description are made regarding the arrangement of the various end pressure blocks 2 in this embodiment and their connection with the tightening strip 3:

[0042] In this embodiment, multiple pressure strips 1 are arranged in pairs parallel and spaced apart to form a pressure body. The axial direction of the pressure body is the axial direction (length direction) of each pressure strip 1. Each pressure strip 1 has end blocks 2 connected to both ends of its axial direction. Among all the end blocks 2 at the first end of the pressure body in the axial direction, at least one end block 2 is a locking block 21, and the remaining end blocks 2 are ordinary blocks. Alternatively, all of these end blocks 2 are locking blocks 21. The first end of the tightening strip 3 is fixedly connected to a locking block 21. The other end of the tightening strip 3 passes through the remaining end blocks 2 in sequence, and finally passes through the locking block 21 fixedly connected to the first end of the tightening strip 3, forming a closed loop structure. The second end of the pressure body in the axial direction is set with reference to the first end of the pressure body in the axial direction.

[0043] At any end of the pressurizing body along the axial direction, since the tightening bar 3 is composed of multiple tapered units connected in the same direction to form a chain, the large diameter end of each tapered unit faces the first end of the tightening bar 3, and the small diameter end of each tapered unit faces the second end of the tightening bar 3. The elastic locking structure 5 inside the locking block 21 always has a tendency to rebound against the end face of the large diameter end of any tapered unit of the tightening bar 3. Thus, the second end of the tightening bar 3 can be pulled relative to the locking block 21 fixedly connected to the first end of the tightening bar 3, so that the elastic locking structure 5 slides from the small diameter end to the large diameter end of each tapered unit of the tightening bar 3 and rebounds to lock onto the end face of the large diameter end of any tapered unit, realizing the one-way locking function of the tightening bar 3. During this period, the circumferential distance between adjacent end blocks 2 is maintained by the compression spring 4.

[0044] During the surgery, after the aortic intima is ruptured, a covered stent is implanted into the aorta. Then, the vascular pressure device is rolled or fitted onto the segment of the blood vessel that has lost its intima. Multiple pressure strips 1 are then tightened at their axially extending ends, forming tightening strips 3. This tightening, along with the end blocks 2, contracts and compresses the blood vessel. During tightening, the tightening force can be adaptively controlled according to different blood vessel shapes. After tightening, the cross-sectional shape and size of the multiple pressure strips 1 at both ends can be adapted to the patient's blood vessel cross-sectional shape (the cross-sectional shape and size at both ends can be the same or different; the outer contour of the multiple pressure strips 1 after tightening can be cylindrical, frustum-shaped, or other shapes). Excess tightening strips 3 are then cut off after tightening. Specifically, "rolling or fitting the vascular pressure device onto the segment of the blood vessel that has lost its intima" means that if, during the surgery, the second end of the tightening strip 3 has not yet been assembled with the locking block 21 fixedly connected to the first end of the tightening strip 3, then the vascular pressure device will have the following shape: Figure 1As shown, the device is sheet-shaped. After wrapping the vascular pressure device around the patient's blood vessel segment, the second end of the tightening strip 3 is passed through the locking block 21, which is fixedly connected to the first end of the tightening strip 3, and the second end of the tightening strip 3 is pulled to achieve a one-way locking. If, during surgery, the second end of the tightening strip 3 has already been assembled with the locking block 21, which is fixedly connected to the first end of the tightening strip 3, then the vascular pressure device will have the following shape: Figure 2 and Figure 3 As shown, it is cylindrical. At this time, after the vascular pressure device is put on the outside of the patient's vascular segment, the second end of the tightening strip 3 is pulled by the locking block 21 which is fixedly connected to the first end of the tightening strip 3 to perform one-way locking. The appropriate device can be selected for surgery according to whether the patient's vascular segment is severed during the operation.

[0045] Compared to existing technologies, this embodiment can be applied to aortic dissection treatment surgery to protect the outer wall of the blood vessel and enhance its strength. After the intima between the true and false lumens is broken, the aortic wall becomes thinner, which means that the blood vessel wall on the side closer to the false lumen has lost its intima, leaving only the media and the outer wall of the blood vessel. This avoids the blood vessel that has lost its intima from developing lesions such as aneurysms due to decreased strength. At the same time, the two ends of the pressure body in this embodiment can be adjusted independently along the axis, so as to adapt to blood vessels of different shapes and sizes to accommodate the blood vessel sizes of different patients.

[0046] In this embodiment, optionally, as follows: Figure 2 and Figure 3 As shown, at any end of the pressure body along the axial direction, in the assembled state, the radial direction of the annular structure formed by the spaced end pressure blocks 2 of multiple pressure bars 1 is the thickness direction of each end pressure block 2; the surface of the end pressure block 2 facing outwards from the annular structure in the thickness direction is the outer surface of the end pressure block 2 in the thickness direction; and the circumferential direction of the annular structure is the width direction of each end pressure block 2. Among these end pressure blocks 2, such as... Figure 6 As shown, the internal channel 20 of the end block 2 (locking block 21) fixedly connected to the first end of the tightening strip 3 has one end penetrating one side surface in the width direction of the end block 2 and the other end penetrating the outer side surface in the thickness direction of the end block 2. The first end of the tightening strip 3 is fixedly connected to the other side surface in the width direction of the end block 2; as shown Figure 5 As shown, the two ends of the internal channel 20 of the remaining end blocks 2 respectively penetrate through the two sides of the end blocks 2 in the width direction. Figure 3 As shown, this structure ensures that the inner surface of each end pressure block 2 in the thickness direction is closely fitted to the outer wall of the patient's blood vessel, balances the pressure value exerted by each end pressure block 2 on the patient's blood vessel wall, and ensures that the blood flow and hemodynamics of the patient's blood vessel are as consistent as possible with or as close as possible to the original blood vessel.

[0047] In this embodiment, optionally, as follows: Figure 6As shown, each locking block 21 is also provided with a mounting hole communicating with its internal channel 20; the elastic locking structure 5 is installed inside the mounting hole, including a plug 51, a locking spring 52 and a locking block 53. One end of the locking spring 52 is fixedly connected to the plug 51, and the other end of the locking spring 52 is fixedly connected to the locking block 53. The plug 51 faces the outside of the end block 2 and is press-fitted with the hole wall of the mounting hole. The locking block 53 faces the internal channel 20, and part of the locking block 53 extends into the internal channel 20. When the tightening bar 3 passes through the internal channel 20 of the locking block 53 and pulls the second end of the tightening bar 3 relative to the locking block 53, the tapered unit sidewall of the tightening bar 3 presses the locking block 53 into the mounting hole. The locking spring 52 is compressed and always has a rebound tendency. When the tightening bar 3 is no longer pulled, the locking spring 52 rebounds until the locking block 53 abuts against the end face of the large diameter end of a tapered unit, realizing one-way locking. In order to achieve rapid locking, further optionally and preferably, such as Figure 6 As shown, the end face of the locking block 53 facing away from the locking spring 52 forms a guide slope 530 that matches the outer surface of the tapered unit.

[0048] To further balance the pressure exerted on the blood vessel wall by each end pressure block 2, in this embodiment, optionally, each end pressure block 2 has the same size; optionally, the spacing between each pair of adjacent end pressure blocks 2 is the same; optionally, the size and stiffness of the compression spring 4 between each pair of adjacent end pressure blocks 2 are the same.

[0049] In addition, in some optional embodiments of this example, during surgery, the second end of the tightening strip 3 is assembled with the locking block 21, which is fixedly connected to the first end of the tightening strip 3, and the vascular pressure device is shaped as follows: Figure 2 and Figure 3 The device is cylindrical in shape. Furthermore, a pulling member 31 is connected to the second end of the tightening strip 3. This facilitates quick pulling of the second end of the tightening strip 3, improving surgical efficiency. Regarding the specific structure of the pulling member 31, optionally, but not limited to, the pulling member 31 includes an end connecting block 311 fixedly connected to the second end of the tightening strip 3. Further optionally, the pulling member 31 also includes a pull ring 312 passing through a hole in the end connecting block 311.

[0050] Finally, it should be noted that the above embodiments and optional implementations in this specification are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing optional implementations, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. In addition, it is emphasized again that, in the absence of conflict, the features of the embodiments and optional implementations in the embodiments in this specification can be combined with each other.

Claims

1. A vascular pressure device, characterized in that: It includes multiple pressure bars (1) and end tightening assemblies respectively located at both ends of the multiple pressure bars (1) along their length; Multiple pressure strips (1) are arranged in parallel intervals to form a pressure body; the two ends of the pressure body are respectively connected to end pressure blocks (2), and the end pressure blocks (2) are provided with internal channels (20) that pass through the end pressure blocks (2); The end tightening assembly includes a tightening bar (3) and multiple compression springs (4); The tightening bar (3) is formed by multiple tapered units connected in the same direction to form a chain. The large diameter end of each tapered unit faces the first end of the tightening bar (3), and the small diameter end of each tapered unit faces the second end of the tightening bar (3). At any end along the axial direction of the pressurizing body: The first end of the tightening strip (3) is fixedly connected to one of the end pressure blocks (2), and the second end of the tightening strip (3) passes through the internal channels (20) of each of the remaining end pressure blocks (2) in sequence; a compression spring (4) is sleeved on the outside of the tightening strip (3) between any two adjacent end pressure blocks (2), one end of the compression spring (4) abuts against one end pressure block (2), and the other end abuts against another end pressure block (2); At least the end pressure block (2) fixedly connected to the tightening strip (3) is provided with an elastic locking structure (5) in its internal channel (20). In the assembled state, the second end of the tightening strip (3) overcomes the elastic force of the elastic locking structure (5) and passes through the internal channel (20) of the end pressure block (2) fixedly connected to the tightening strip (3), so that the end pressure blocks (2) of the multiple pressure strips (1) are arranged in a ring structure at intervals. The elastic locking structure (5) always has a springback tendency to abut against the end face of the large diameter end of any of the tapered units to lock the tightening strip (3) in one direction.

2. The vascular compression device according to claim 1, characterized in that: At any end along the axial direction of the pressurizing body: in the assembled state, the radial direction of the annular structure formed by the spaced end pressure blocks (2) of the plurality of pressurizing bars (1) is the thickness direction of each end pressure block (2); the surface of the end pressure block (2) facing the outside of the annular structure in the thickness direction is the outer surface of the end pressure block (2) in the thickness direction; and the circumference of the annular structure is the width direction of each end pressure block (2). One end of the internal channel (20) of the end block (2) fixedly connected to the first end of the tightening strip (3) passes through one side surface of the end block (2) in the width direction and the other end passes through the outer side surface of the end block (2) in the thickness direction. The first end of the tightening strip (3) is fixedly connected to the other side surface of the end block (2) in the width direction. The two ends of the internal channels (20) of the remaining end blocks (2) pass through the two sides of the end block (2) in the width direction.

3. The vascular compression device according to claim 1, characterized in that: The end block (2) of the internal channel (20) is also provided with an elastic locking structure (5) as a locking block (21); the locking block (21) is also provided with an installation hole communicating with its internal channel (20); The elastic locking structure (5) is installed inside the mounting hole and includes a plug (51), a locking spring (52) and a locking block (53). One end of the locking spring (52) is fixedly connected to the plug (51), and the other end of the locking spring (52) is fixedly connected to the locking block (53). The plug (51) faces the outside of the end pressure block (2) and is interference-fitted with the wall of the mounting hole. The locking block (53) faces the internal channel (20), and part of the locking block (53) extends into the internal channel (20).

4. The vascular compression device according to claim 3, characterized in that: The end face of the locking block (53) facing away from the locking spring (52) forms a guide slope (530) that matches the outer surface of the tapered unit.

5. The vascular compression device according to claim 1, characterized in that: Each of the end blocks (2) has the same size.

6. The vascular compression device according to claim 1, characterized in that: The spacing between each pair of adjacent end blocks (2) is the same.

7. The vascular compression device according to claim 1, characterized in that: The compression springs (4) between each pair of adjacent end blocks (2) have the same size and stiffness.

8. The vascular compression device according to claim 1, characterized in that: The second end of the tightening strip (3) is also connected to a puller (31).

9. The vascular compression device according to claim 8, characterized in that: The pulling member (31) includes an end connecting block (311) fixedly connected to the second end of the tightening bar (3).

10. The vascular compression device according to claim 9, characterized in that: The pull member (31) also includes a pull ring (312) that passes through a hole in the end connecting block (311).

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