Large-area contact type threaded degradable magnesium alloy aorta blood vessel anastomat

Abstract

The large-area contact type threaded degradable magnesium alloy aorta blood vessel anastomat comprises a conical inner ring, a conical outer ring and a sleeve outer ring which are sequentially arranged from inside to outside, a blood vessel clamping space is formed between the conical inner ring and the conical outer ring, and the conical outer ring and the sleeve outer ring are in threaded fit. The sleeve outer ring is rotated to adjust the size of the blood vessel clamping space. The blood vessel anastomosis device is simple in structure, reasonable in design and convenient to use, the size of a blood vessel clamping space is adjusted by rotating the conical outer ring and the sleeve outer ring, so that blood vessels are fixed, blood vessel anastomosis is rapidly achieved, meanwhile, the traditional outward turning type end face combination mode is avoided, the contact area between the blood vessels is greatly increased, and blood leakage is prevented.

Description

Technical Field

[0001] The invention relates to a large-area contact type threaded degradable magnesium alloy aortic vascular anastomosis device. Background Art

[0002] Cardiovascular diseases are becoming more common with the aging of the population. Vascular anastomosis is an important step in the treatment of cardiovascular diseases. The speed, accuracy and reliability of the anastomosis will affect the patient's postoperative recovery. For a long time, medical staff have used sutures to anastomose blood vessels. The reason is that sutures have high applicability and reliability, but sutures require medical staff to have a high level of surgical skills and the operation process is complicated and time-consuming. In addition, sutures can easily cause damage to the blood vessel wall, which is not conducive to the patient's postoperative recovery.

[0003] With the development of science and technology, the methods of vascular anastomosis have become more diverse. Currently, there are methods such as biological glue bonding, laser and high-frequency electrocoagulation thermal welding, and vascular staplers. Although these methods have simplified the process of vascular anastomosis and reduced the difficulty of operation, there are still many problems. For example, although biological glue eliminates the need for sutures and reduces the risk of complications, its reliability and stability still need to be verified, and there is a strong uncertainty; although thermal welding technology is efficient and fast, the welding temperature must be controlled during operation, otherwise it is likely to cause irreversible thermal damage to vascular tissue, posing a safety hazard. In this context, the vascular stapler with a precisely designed mechanical structure has emerged among many technologies with its significant advantages of being fast, safe, reliable and easy to operate, and has become a strong candidate for solving the limitations of existing technologies. However, the current traditional vascular stapler is not rationally constructed. Some staplers are made of non-degradable metals, which will prevent patients from undergoing postoperative medical tests such as CT and MR. Other staplers use puncture-type connections, which can cause certain damage to the blood vessel wall and affect the patient's postoperative recovery. Most staplers with non-puncture designs have too small a contact area between blood vessels, which can cause blood leakage hazards when used in the aorta. The present invention avoids the above unfavorable conditions, uses degradable magnesium alloy as a material, and uses threaded matching to avoid damage to blood vessels caused by traditional puncture-type staplers. It also increases the contact area between blood vessels to prevent the risk of blood leakage. Summary of the invention

[0004] The present invention improves the above-mentioned problem, that is, the present invention provides a large-area contact threaded biodegradable magnesium alloy aortic vascular anastomosis device, which has a simple structure and is easy to use.

[0005] The present invention is constructed as follows: it includes a conical inner ring, a conical outer ring and a sleeve outer ring which are arranged in sequence from the inside to the outside; a blood vessel clamping space is arranged between the conical inner ring and the conical outer ring; the conical outer ring and the sleeve outer ring are threadedly matched; the size of the blood vessel clamping space is adjusted by rotating the sleeve outer ring.

[0006] Furthermore, the outer wall of the conical inner ring and the inner wall of the conical outer ring are conical surfaces.

[0007] Furthermore, the outer surface of the conical outer ring is provided with an external thread protrusion, and the inner surface of the sleeve outer ring is provided with an internal thread groove, and the external thread protrusion and the internal thread groove are threadably matched.

[0008] Furthermore, the sleeve outer ring includes a sleeve and an annular bottom plate, the middle portion of the annular bottom plate is a bottom plate through hole, and the sleeve and the annular bottom plate are integrated.

[0009] Furthermore, a plurality of limiting holes are provided on the annular bottom plate of the sleeve outer ring and on the end surface of the conical outer ring.

[0010] Furthermore, the conical inner ring, the conical outer ring and the sleeve outer ring are coaxially arranged.

[0011] Furthermore, a conical inner ring through hole is provided in the middle of the conical inner ring, and the outer surface of the conical inner ring is a conical inner ring outer cone surface.

[0012] Furthermore, a conical outer ring through hole is provided in the middle of the conical outer ring, and a conical outer ring inner conical surface is provided on the inner wall of the conical outer ring.

[0013] Furthermore, the conical outer ring and the sleeve outer ring are both limited in rotation by special pliers. The special pliers include a first pliers body and a second pliers body. The upper parts of the first pliers body and the second pliers body are rotatably matched via a hinge. The upper parts of the first pliers body and the second pliers body are both provided with semicircular bending parts, and semicircular grooves are formed inside the semicircular bending parts. The openings of the two semicircular grooves are arranged opposite to each other and can be closed into a circular hole. The lower outer sides of the first pliers body and the second pliers body are both provided with a first handle, and a plurality of positioning pins are provided on the sides of the semicircular bending parts. The positioning pins cooperate with the limiting holes of the sleeve outer ring and the limiting holes of the conical outer ring.

[0014] Furthermore, the conical inner ring, the conical outer ring and the sleeve outer ring are all made of magnesium alloy material.

[0015] Furthermore, the working method of the large-area contact threaded biodegradable magnesium alloy aortic vascular anastomosis device is to adjust the spacing between the conical inner ring and the conical outer ring by rotating the conical outer ring and the sleeve outer ring.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention passes a section of blood vessel through the inner ring of a conical inner ring and then turns it outward to cover the outer conical surface of the conical inner ring of the conical inner ring, and then uses a dilator to open the other section of the blood vessel and cover it on the other everted blood vessel, so that the inner walls of the two sections of the blood vessel contact and anastomose with each other, and at the same time, it can ensure that the blood vessels at both ends have a larger contact area, so that the anastomosis between the blood vessels is tighter to prevent blood leakage, and by rotating the conical outer ring and the outer ring of the sleeve, the distance between the outer conical surface of the conical inner ring and the inner conical surface of the conical outer ring is changed, and the size of the blood vessel clamping space is adjusted, so as to control the degree of squeezing between the blood vessels and achieve blood vessel anastomosis; the vascular anastomosis device of the present invention adopts a large-area contact threaded biodegradable magnesium alloy design. This innovative design can simplify the steps of vascular suturing in clinical surgery for cardiovascular diseases, making the vascular anastomosis stage simpler and faster, and medical staff can operate without long-term training, and at the same time, it can prevent traditional suture suturing from causing damage to the blood vessels.

[0017] 2. The present invention provides limited holes on the conical outer ring and the annular bottom plate of the sleeve outer ring, so that medical staff can conveniently complete the assembly of the stapler in a narrow space by operating special pliers.

[0018] 3. The vascular anastomosis device of the present invention adopts magnesium alloy as material, which can be naturally degraded in the human body and will not cause long-term impact on the inner diameter of the blood vessel, thereby suppressing the risk of thrombosis caused by the patient's use of the anastomosis device; in addition, magnesium is an essential element that cannot be produced by the human body, and the magnesium element required by the human body can also be supplemented during the degradation process of the magnesium alloy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 It is a cross-sectional view of the overall structure of an embodiment of the present invention; Figure 3 A stereoscopic diagram of a conical inner ring according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of a conical inner ring according to an embodiment of the present invention; Figure 5 A stereoscopic diagram of a conical outer ring according to an embodiment of the present invention; Figure 6 This is a cross-sectional view of a tapered outer ring according to an embodiment of the present invention; Figure 7 This is a side view of a tapered outer ring according to an embodiment of the present invention; Figure 8 A three-dimensional diagram of the outer ring of the sleeve according to an embodiment of the present invention; Fig. 9 This is a cross-sectional view of the outer ring of the sleeve according to an embodiment of the present invention; Fig.10 This is a side view of the outer ring of the sleeve according to an embodiment of the present invention; Fig.11This is a schematic diagram of the blood vessel connection structure at both ends of an embodiment of the present invention; Fig.12 This is a schematic diagram of the connection and cooperation between the special hand pliers and the outer ring of the sleeve according to an embodiment of the present invention; Fig.13 This is a schematic diagram of the structure of the special hand pliers according to an embodiment of the present invention; Fig.14 The working example of the present invention is shown in FIG. Figure 1 (The two sections of blood vessels pass through the cone outer ring and the sleeve outer ring respectively); Fig.15 The working example of the present invention is shown in FIG. Figure 2 (Two blood vessels are anastomosed with the conical inner ring); Fig.16 The working example of the present invention is shown in FIG. Figure 3 (Use hand pliers to tighten the stapler); Fig.17 This is a cross-sectional view of a blood vessel and anastomosis device after degradation of a magnesium alloy anastomosis device according to an embodiment of the present invention (the dotted line represents the degraded anastomosis device); Fig.18 Schematic diagram of the initial corrosion of the magnesium alloy stapler according to an embodiment of the present invention (small corrosion pits appear on the surface of the stapler).

[0020] Fig.19 Schematic diagram of mid-term corrosion of a magnesium alloy stapler according to an embodiment of the present invention (pits on the surface of the stapler gradually expand). DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example: Refer to the attached Figure 1-19 As shown, a large-area contact threaded biodegradable magnesium alloy aortic vascular anastomosis device is provided, comprising a conical inner ring 1, a conical outer ring 2 and a sleeve outer ring 3 which are arranged in sequence from the inside to the outside, the conical inner ring, the conical outer ring and the sleeve outer ring are coaxially arranged, a blood vessel clamping space 4 is arranged between the conical inner ring and the conical outer ring, the outer wall of the conical inner ring and the inner wall of the conical outer ring are conical surfaces, preferably, the conical surface angle of the outer conical surface of the conical inner ring and the inner conical surface of the conical outer ring are the same, the blood vessel clamping space is between the two conical surfaces, the conical outer ring and the sleeve outer ring are threadedly matched, the size of the blood vessel clamping space is adjusted by rotating the sleeve outer ring and the sleeve outer ring, that is, the clamping and fixing function of the blood vessel 5 is realized by changing the distance between the conical inner ring and the conical outer ring; the device is mainly used for aortic suturing in surgical operations for cardiovascular diseases.

[0023] In the embodiment of the present invention, a conical inner ring through hole 101 is provided in the middle of the conical inner ring 1, and the outer surface of the conical inner ring is a conical inner ring outer cone surface 102; the angle between the conical inner ring outer cone surface and the central axis can be 10°.

[0024] In an embodiment of the present invention, a conical outer ring through hole 201 is provided in the middle of the conical outer ring 2, and a conical outer ring inner cone surface 202 is provided on the inner wall of the conical outer ring; the conical outer ring inner cone surface and the conical inner ring outer cone surface have the same cone surface angle, and the angle between the conical outer ring inner cone surface and the central axis can also be 10°.

[0025] In the embodiment of the present invention, the outer surface of the conical outer ring 2 is provided with an external thread protrusion 203, which is the external thread part. The inner surface of the sleeve outer ring 3 is provided with an internal thread groove 301, which is the internal thread part matching with the external thread part. The external thread protrusion and the internal thread groove are threadedly matched.

[0026] The protruding angle of the external thread of the conical outer ring is relatively low, so the thread can be self-locked to prevent loosening during the process of tightening the anastomosis device.

[0027] In the embodiment of the present invention, the sleeve outer ring 3 includes a sleeve 302 and an annular bottom plate 303. The middle part of the annular bottom plate is a bottom plate through hole 304. The sleeve and the annular bottom plate are integrated; the bottom plate through hole of the annular bottom plate corresponds to the size of the conical inner ring through hole of the conical inner ring. The annular bottom plate will contact the conical inner ring during the matching process, and the distance between the conical inner ring and the conical outer ring is controlled by rotating the conical outer ring and the sleeve outer ring, thereby achieving anastomosis and fixation of the blood vessel.

[0028] In the embodiment of the present invention, a plurality of limiting holes 305 are provided on the annular bottom plate of the sleeve outer ring and on the end surface of the conical outer ring.

[0029] In the embodiment of the present invention, the conical outer ring and the sleeve outer ring are both limitedly rotated by special pliers 6, and the special pliers 6 include a first pliers body 601 and a second pliers body 602. The upper parts of the first pliers body and the second pliers body are rotated together through a hinge 603. The hinge can be a pin, a bolt or a screw. The upper parts of the first pliers body and the second pliers body are both provided with a semicircular bending part 604, and a semicircular groove 605 is formed inside the semicircular bending part. The openings of the two semicircular grooves are arranged opposite to each other and can be closed into a circular hole. The lower outer side of the first pliers body and the second pliers body is provided with a first handle 606, and the first handle can be in a closed ring shape. A plurality of positioning pins 607 are provided on the side of the semicircular bending part, and the positioning pins cooperate with the limiting holes 305 of the sleeve outer ring and the limiting holes 305 of the conical outer ring, so as to facilitate medical staff to tighten the anastomosis device.

[0030] When the special hand forceps are used, the positioning pins of the special hand forceps are inserted into the limiting holes of the sleeve outer ring and the limiting holes of the tapered outer ring, and then the special hand forceps are rotated according to usage requirements to control the rotation of the sleeve outer ring and the tapered outer ring, thereby changing the size of the blood vessel clamping space.

[0031] The use of special pliers can facilitate medical staff to complete the assembly of the stapler in a small space.

[0032] In an embodiment of the present invention, the conical inner ring, the conical outer ring and the sleeve outer ring are all made of magnesium alloy material; magnesium alloy is a degradable material, and compared with stainless steel and titanium alloy, it can be self-degraded in the human body to avoid the risk of thrombosis caused by the anastomosis device; at the same time, magnesium is an essential trace element for the human body and will not affect the human body during the degradation process.

[0033] In the embodiment of the present invention, the conical inner ring, the conical outer ring and the sleeve outer ring are all provided with rounded corners at the connection between the surfaces; the rounded corners can ensure that the anastomosis device will not cause cutting damage to the blood vessels during operation.

[0034] In the embodiment of the present invention, the steps are as follows: Step 1: First, pass the two sections of blood vessels through the cone outer ring and the sleeve outer ring respectively; Step 2: After a section of the blood vessel passes through the inner wall 103 of the conical inner ring, it is turned outward and covered on the outer conical surface of the conical inner ring. Then, a dilator is used to open another section of the blood vessel and cover it on the turned outward blood vessel, so that the inner walls of the two sections of the blood vessel are in contact and anastomosed with each other, and at the same time, it can ensure that the blood vessels at both ends have a larger contact area to better prevent blood leakage; Step three, use special pliers to limit the conical outer ring and the conical inner ring, then tighten the conical outer ring and the sleeve outer ring, and adjust the distance of the blood vessel clamping space through the cooperating threads of the conical outer ring and the sleeve outer ring, so as to control the degree of squeezing between the blood vessels.

[0035] In an embodiment of the present invention, the device passes a section of the blood vessel through the inner wall of the conical inner ring and fixes it on the outer conical surface of the conical inner ring of the outer wall of the conical inner ring by everting it outward; another section of the blood vessel is expanded by a dilator and covered on the everted inner wall of the blood vessel, thereby achieving anastomosis between the inner walls of the blood vessels; since the cross-section of the blood vessel is not a complete thin-walled circular ring, its thickness is different in all aspects, and therefore the anastomosis method of the device can increase the contact area, making the blood vessel anastomosis tighter while preventing the risk of blood vessel leakage due to too small a contact area.

[0036] This device controls the distance between the outer conical surface of the conical inner ring and the inner conical surface of the conical outer ring through the spiral feeding of the conical outer ring and the sleeve outer ring, that is, changes the size of the blood vessel clamping space, thereby generating a squeezing force on the blood vessels to achieve anastomosis between the blood vessels. Due to the design of a single inner ring, the contact area between the two sections of the blood vessels can be effectively increased, avoiding the hidden danger of blood leakage caused by too small a contact area. In addition, the use of magnesium alloy as a material can not only make the anastomosis device naturally degrade in the human body, but also ensure that the degradation products of the anastomosis device do not cause damage to the human body.

[0037] Unless otherwise stated, any technical solution disclosed in the present invention, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many implementable numerical values. Since there are too many numerical values ​​to be exhaustive, the present invention discloses some numerical values ​​to illustrate the technical solution of the present invention, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the present invention.

[0038] If the words "first", "second" and so on are used in this article to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of description to distinguish the components. Unless otherwise stated, the above words have no special meaning.

[0039] At the same time, if the above-mentioned invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).

[0040] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the present invention include states or shapes that are approximate, similar, or close to them.

[0041] Any component provided by the present invention may be assembled from a plurality of separate components, or may be a separate component manufactured by an integral forming process.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A large-area contact threaded biodegradable magnesium alloy aortic vascular anastomosis device, characterized in that: It includes a conical inner ring, a conical outer ring and a sleeve outer ring which are arranged in sequence from the inside to the outside. A blood vessel clamping space is arranged between the conical inner ring and the conical outer ring. The conical outer ring and the sleeve outer ring are threadedly matched. The size of the blood vessel clamping space can be adjusted by rotating the sleeve outer ring.

2. The large-area contact threaded biodegradable magnesium alloy aortic vascular anastomosis device according to claim 1 is characterized in that: The outer wall of the conical inner ring and the inner wall of the conical outer ring are both conical surfaces; the conical surface of the outer wall of the conical inner ring and the conical surface of the inner wall of the conical outer ring have the same angle.

3. The large-area contact threaded biodegradable magnesium alloy aortic vascular anastomosis device according to claim 1 is characterized in that: The outer surface of the conical outer ring is provided with an external thread protrusion, and the inner surface of the sleeve outer ring is provided with an internal thread groove, and the external thread protrusion and the internal thread groove are threadedly matched; the sleeve outer ring includes a sleeve and an annular bottom plate, the middle part of the annular bottom plate is a bottom plate through hole, and the sleeve and the annular bottom plate are integrated.

4. The large-area contact threaded biodegradable magnesium alloy aortic vascular anastomosis device according to claim 1, characterized in that: A plurality of limiting holes are arranged on the annular bottom plate of the sleeve outer ring and on the end surface of the conical outer ring.

5. The large-area contact threaded biodegradable magnesium alloy aortic vascular anastomosis device according to claim 1, characterized in that: The conical inner ring, the conical outer ring and the sleeve outer ring are coaxially arranged.

6. The large-area contact threaded biodegradable magnesium alloy aortic vascular anastomosis device according to claim 1, characterized in that: A conical inner ring through hole is provided in the middle of the conical inner ring, and the outer surface of the conical inner ring is a conical inner ring outer cone surface.

7. The large-area contact threaded biodegradable magnesium alloy aortic vascular anastomosis device according to claim 1, characterized in that: A conical outer ring through hole is provided in the middle of the conical outer ring, and a conical outer ring inner conical surface is provided on the inner wall of the conical outer ring.

8. The large-area contact threaded biodegradable magnesium alloy aortic vascular anastomosis device according to claim 1, characterized in that: The conical outer ring and the sleeve outer ring are both limited in rotation by special pliers. The special pliers include a first pliers body and a second pliers body. The upper parts of the first pliers body and the second pliers body are rotated together via a hinge. The upper parts of the first pliers body and the second pliers body are both provided with semicircular bending parts, and semicircular grooves are formed inside the semicircular bending parts. The openings of the two semicircular grooves are arranged opposite to each other and can be closed into a circular hole. The outer sides of the lower parts of the first pliers body and the second pliers body are both provided with a first handle. A plurality of positioning pins are provided on the sides of the semicircular bending parts. The positioning pins cooperate with the limiting holes of the sleeve outer ring and the limiting holes of the conical outer ring.

9. The large-area contact threaded biodegradable magnesium alloy aortic vascular anastomosis device according to claim 1, characterized in that: The conical inner ring, the conical outer ring and the sleeve outer ring are all made of magnesium alloy material.

10. A working method using the large-area contact threaded biodegradable magnesium alloy aortic vascular anastomosis device as claimed in any one of claims 1 to 9, characterized in that: The distance between the conical inner ring and the conical outer ring is adjusted by rotating the conical outer ring and the sleeve outer ring.

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