Large-area contact type threaded degradable magnesium alloy aortic vessel anastomat

Abstract

The present application relates to a kind of large-area contact type thread type degradable magnesium alloy aortic blood vessel anastomat, including the cone type inner ring, the cone type outer ring and sleeve outer ring being sequentially arranged from inside to outside, blood vessel clamping space is arranged between the cone type inner ring and the cone type outer ring, the cone type outer ring and sleeve outer ring are threaded cooperation, the size of blood vessel clamping space is adjusted by rotating sleeve outer ring, sleeve outer ring.The present application is simple in structure, reasonable in design, convenient to use, the size of blood vessel clamping space is adjusted by rotating cone type outer ring and sleeve outer ring, to fix blood vessel, quickly realize blood vessel anastomosis, while avoiding the mode of traditional eversion through end face combination, greatly increase the contact area between blood vessel to prevent the occurrence of blood leakage.

Description

TECHNICAL FIELD

[0001] The present application relates to a large-area contact type threaded degradable magnesium alloy aortic vessel anastomat. BACKGROUND

[0002] Cardiovascular diseases become more common with the aging of the population. Vessel anastomosis is an important step in the treatment of cardiovascular diseases, and the speed, accuracy and reliability of the anastomosis will affect the postoperative rehabilitation of the patient. For a long time, medical staff has used suture to anastomose the blood vessels, because suture has high applicability and reliability, but suture requires medical staff to have high surgical level and the operation process is complex and time-consuming. In addition, suture is very easy to cause damage to the blood vessel wall, which is not conducive to the postoperative recovery of the patient.

[0003] With the development of science and technology, the way of vessel anastomosis has become more diversified. Currently, biological glue bonding, laser and high-frequency electrocoagulation heat welding method, and vessel anastomosis device have appeared. Although these methods have simplified the process of vessel anastomosis and reduced the operation difficulty, there are still many problems. For example, although biological glue reduces the risk of complications by eliminating suture, its reliability and stability still need to be verified, and it has strong uncertainty. Although heat welding technology is efficient and fast, the temperature of welding needs to be controlled during operation, otherwise it may cause irreversible thermal damage to the blood vessel tissue, which has safety hazards. Under this background, the vessel anastomosis device with precise mechanical structure has outstanding advantages of being fast, safe, reliable and easy to operate, and becomes a strong candidate to solve the limitations of existing technology among many technologies, but the structure of the traditional vessel anastomosis device is unreasonable. The material of part of the anastomosis device is non-degradable metal, which will prevent the patient from being detected by a series of medical instruments such as CT and MR after surgery. Some anastomosis devices use puncture type connection, which will cause damage to the blood vessel wall and affect the postoperative recovery of the patient. The anastomosis device without puncture design mostly has too small contact area between blood vessels, which will cause blood leakage at the aortic large blood vessel. The present application avoids the above-mentioned adverse conditions, uses degradable magnesium alloy as the material, and uses threaded connection to avoid damage to the blood vessel caused by traditional puncture type anastomosis device, and also increases the contact area between blood vessels to prevent the risk of blood leakage. SUMMARY

[0004] The present application improves the above-mentioned problems, that is, the present application provides a large-area contact type threaded degradable magnesium alloy aortic vessel anastomat, which is simple in structure and convenient to use.

[0005] The application is composed of a conical inner ring, a conical outer ring and a sleeve outer ring arranged from inside to 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 in threaded cooperation, the size of the blood vessel clamping space is adjusted by rotating the sleeve outer ring.

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

[0007] Further, the outer surface of the conical outer ring is provided with an external thread protrusion, 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 in threaded cooperation.

[0008] Further, the sleeve outer ring comprises 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.

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

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

[0011] Further, the middle part of the conical inner ring is provided with a conical inner ring through hole, and the outer surface of the conical inner ring is a conical inner ring outer conical surface.

[0012] Further, the middle part of the conical outer ring is provided with a conical outer ring through hole, and the inner wall of the conical outer ring is provided with a conical outer ring inner conical surface.

[0013] Further, the conical outer ring and the sleeve outer ring are limited to rotate by using a special hand clamp, the special hand clamp comprises a first clamp body and a second clamp body, the upper parts of the first clamp body and the second clamp body are rotationally connected through a hinge, the upper parts of the first clamp body and the second clamp body are provided with semicircular bent parts, semicircular grooves are formed in the semicircular bent parts, the openings of the two semicircular grooves are oppositely arranged and can be folded into a circular hole, the outer sides of the lower parts of the first clamp body and the second clamp body are provided with first handles, a plurality of positioning pins are arranged beside the semicircular bent parts, and the positioning pins are matched with the limiting holes of the sleeve outer ring and the limiting holes of the conical outer ring.

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

[0015] Further, the working method of the large-area contact type threaded degradable magnesium alloy aortic vessel anastomat adjusts the distance 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 application has the following beneficial effects:

[0017] 1. This invention involves passing a segment of blood vessel through the inner ring of a conical inner ring and then everting it over the outer conical surface of the inner ring. An expander is then used to open another segment of blood vessel and place it over the everted vessel, allowing the inner walls of the two segments to contact and anastomose. This ensures a large contact area between the two vessels, resulting in a tighter anastomosis and preventing blood leakage. By rotating the outer conical ring and the outer sleeve ring, the distance between the outer and inner conical surfaces of the inner and outer rings is changed, adjusting the clamping space and controlling the degree of compression between the vessels to achieve anastomosis. The anastomosis device of this invention uses a large-area contact threaded biodegradable magnesium alloy design. This innovative design simplifies the vascular suturing steps in cardiovascular surgery, making the anastomosis stage simpler and faster. Medical personnel can operate it without extensive training, while preventing damage to blood vessels caused by traditional sutures.

[0018] 2. The present invention provides a limiting hole on the conical outer ring and the annular base plate of the sleeve outer ring, which allows medical staff to easily assemble the stapler in a confined space by operating a specially designed hand pliers.

[0019] 3. The vascular anastomosis device of the present invention uses magnesium alloy as a material, which can be naturally degraded in the human body and will not have a long-term effect on the inner diameter of blood vessels, thus inhibiting the risk of thrombosis caused by the use of the anastomosis device by the patient; in addition, magnesium is an essential element that the human body cannot produce, and the magnesium required by the human body can be supplemented during the degradation process of magnesium alloy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of the overall structure of an embodiment of the present invention;

[0022] Figure 3 This is a perspective view of the conical inner ring according to an embodiment of the present invention;

[0023] Figure 4 This is a sectional view of the conical inner ring according to an embodiment of the present invention;

[0024] Figure 5 This is a perspective view of the conical outer ring according to an embodiment of the present invention;

[0025] Figure 6 This is a sectional view of the tapered outer ring according to an embodiment of the present invention;

[0026] Figure 7 This is a side view of the conical outer ring according to an embodiment of the present invention;

[0027] Figure 8 This is a perspective view of the outer ring of the sleeve according to an embodiment of the present invention;

[0028] Figure 9 The cross-sectional view of the sleeve outer ring of the embodiment of the present application;

[0029] Figure 10 The side view of the sleeve outer ring of the embodiment of the present application;

[0030] Figure 11 The schematic diagram of the two-end blood vessel connecting structure of the embodiment of the present application;

[0031] Figure 12 The schematic diagram of the special hand pliers and the sleeve outer ring connecting and cooperating of the embodiment of the present application;

[0032] Figure 13 The schematic diagram of the special hand pliers structure of the embodiment of the present application;

[0033] Figure 14 The working schematic of the embodiment of the present application(Two sections of blood vessels respectively pass through the conical outer ring and the sleeve outer ring); Figure 1

[0034] The working schematic of the embodiment of the present application(Two sections of blood vessels and the conical inner ring are anastomosed); Figure 15 Figure 2 The working schematic of the embodiment of the present application (The hand pliers is used to tighten the anastomat);

[0035] Figure 16 Figure 3 The cross-sectional view of the blood vessel and the anastomat after the magnesium alloy anastomat is degraded of the embodiment of the present application (the dotted line is the anastomat which has been degraded);

[0036] Figure 17 The schematic diagram of the magnesium alloy anastomat initial corrosion of the embodiment of the present application (smaller corrosion pits appear on the surface of the anastomat).

[0037] Figure 18 The schematic diagram of the magnesium alloy anastomat middle-term corrosion of the embodiment of the present application (the pits on the surface of the anastomat gradually expand).

[0038] Figure 19 The specific implementation method of the present application is as follows. DETAILED DESCRIPTION

[0039] The present application will be further described in detail below in combination with the drawings and specific implementation methods.

[0040] Embodiment: refer to the drawings Figures 1-19As shown, a large-area contact type threaded degradable magnesium alloy aortic vessel anastomat is provided, which comprises a conical inner ring 1, a conical outer ring 2 and a sleeve outer ring 3 arranged in sequence from inside to outside, the conical inner ring, the conical outer ring and the sleeve outer ring are coaxially arranged, a 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 angles of the outer conical surface of the conical inner ring and the inner conical surface of the conical outer ring are the same, the vessel clamping space is between the two conical surfaces, the conical outer ring and the sleeve outer ring are in threaded cooperation, the size of the vessel clamping space is adjusted by rotating the sleeve outer ring, that is, the distance between the conical inner ring and the conical outer ring is changed to realize the clamping and fixing function of the vessel 5; the device is mainly applied to aortic suturing in surgical operation of cardiovascular diseases.

[0041] In the embodiment of the present application, the middle part of the conical inner ring 1 is provided with a conical inner ring through hole 101, and the outer surface of the conical inner ring is a conical inner ring outer conical surface 102; the included angle between the conical inner ring outer conical surface and the central axis can be 10°.

[0042] In the embodiment of the present application, the middle part of the conical outer ring 2 is provided with a conical outer ring through hole 201, and the inner wall of the conical outer ring is provided with a conical outer ring inner conical surface 202; the conical surface angle of the conical outer ring inner conical surface and the conical inner ring outer conical surface is the same, and the included angle between the conical outer ring inner conical surface and the central axis can also be 10°.

[0043] In the embodiment of the present application, the outer surface of the conical outer ring 2 is provided with an outer thread convex 203, which is an outer thread part, the inner surface of the sleeve outer ring 3 is provided with an inner thread groove 301, which is an inner thread part matched with the outer thread part, and the outer thread convex and the inner thread groove are in threaded cooperation.

[0044] The outer thread convex angle of the conical outer ring is low, so that the self-locking and anti-loosening effect can be realized during the tightening of the anastomat.

[0045] In the embodiment of the present application, the sleeve outer ring 3 comprises a sleeve 302 and a ring-shaped bottom plate 303, the middle part of the ring-shaped bottom plate is a bottom plate through hole 304, and the sleeve and the ring-shaped bottom plate are integrated; the size of the bottom plate through hole of the ring-shaped bottom plate corresponds to that of the conical inner ring through hole of the conical inner ring. The ring-shaped bottom plate will be in contact with the conical inner ring during cooperation, 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, so that the anastomosis and fixation of the vessel are realized.

[0046] In the embodiment of the present application, a plurality of limiting holes 305 are arranged on the ring-shaped bottom plate of the sleeve outer ring and the end face of the conical outer ring.

[0047] In the embodiment of the present application, the conical outer ring and the sleeve outer ring are both limited to rotate by the special hand tongs 6, the special hand tongs 6 include a first tong body 601 and a second tong body 602, the upper parts of the first tong body and the second tong body are rotationally connected by a hinge 603, the hinge can be a pin shaft, a bolt or a screw, the upper parts of the first tong body and the second tong body are both provided with a semicircular bent part 604, a semicircular groove 605 is formed inside the semicircular bent part, the openings of the two semicircular grooves are oppositely arranged and can be folded into a circular hole, the outer sides of the lower parts of the first tong body and the second tong body are both provided with a first handle 606, the first handle can be in the shape of a closed loop, a plurality of positioning pins 607 are arranged beside the semicircular bent part, the positioning pins are matched with the limiting holes 305 of the sleeve outer ring and the limiting holes 305 of the conical outer ring, which facilitates the medical staff to tighten the anastomat.

[0048] When the special hand tongs are used, the positioning pins of the special hand tongs are inserted into the limiting holes of the sleeve outer ring and the limiting holes of the conical outer ring, then the special hand tongs are rotated according to the use requirement, so as to control the rotation of the sleeve outer ring and the conical outer ring, thereby changing the size of the blood vessel clamping space.

[0049] The operation by the special hand tongs can facilitate the medical staff to assemble the anastomat in a small space.

[0050] In the embodiment of the present application, the conical inner ring, the conical outer ring and the sleeve outer ring are all made of magnesium alloy material; the magnesium alloy is a degradable material, compared with stainless steel and titanium alloy, it can be degraded in the human body to avoid the risk of thrombosis caused by the anastomat; at the same time, magnesium is a trace element necessary for the human body, which will not affect the human body during the degradation process.

[0051] In the embodiment of the present application, the conical inner ring, the conical outer ring and the sleeve outer ring are all provided with a fillet at the connection between the surfaces; the fillet can ensure that the anastomat will not cause a split injury to the blood vessel during operation and use.

[0052] In the embodiment of the present application, the use steps are as follows:

[0053] Step one, first pass two blood vessels through the conical outer ring and the sleeve outer ring respectively;

[0054] Step two, after passing one blood vessel through the inner wall 103 of the conical inner ring, turn it outside on the conical outer surface of the conical inner ring, then use the dilator to open the other blood vessel on the turned outside blood vessel, so that the inner walls of the two blood vessels contact and anastomose, and at the same time, it can also ensure that the two end blood vessels have a larger contact area to better prevent blood leakage;

[0055] Step three, adopt special hand pliers to limit the conical outer ring and the conical inner ring, then tighten the conical outer ring and the sleeve outer ring, adjust the distance of the blood vessel clamping space through the thread of the conical outer ring and the sleeve outer ring, thereby control the extrusion degree between the blood vessels.

[0056] In the embodiment of the present application, the device is used to pass a section of blood vessel through the inner wall of the conical inner ring and fix it on the conical outer surface of the conical inner ring by turning outward; another section of blood vessel is covered on the inner wall of the turned outward blood vessel after being expanded by the dilator, thereby realizing the anastomosis between the inner wall of the blood vessel and the inner wall of the blood vessel; since the cross section of the blood vessel is not a complete thin-walled ring, the thickness is not the same in all aspects, so the anastomosis mode of the device can increase the contact area, make the blood vessel anastomosis more closely, and prevent the risk of blood leakage caused by too small contact area.

[0057] The device is used to control the distance between the conical outer surface of the conical inner ring and the conical inner surface of the conical outer ring through the screw feeding mode of the conical outer ring and the sleeve outer ring, that is, change the size of the blood vessel clamping space, thereby generate extrusion force on the blood vessel to realize the anastomosis between the blood vessels. Since the single inner ring design is adopted, the contact area between the two sections of blood vessels can be effectively increased, and the risk of blood leakage caused by too small contact area is avoided. In addition, the magnesium alloy is used as the material, which can not only make the anastomosis device degrade naturally in the human body, but also ensure that the degradation products of the anastomosis device do not cause damage to the human body.

[0058] Any technical solution disclosed in the present application, unless otherwise stated, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range, any person skilled in the art should understand that the preferred numerical range is only one of the many implementable values with more obvious technical effects or representative values. Since there are too many values, it is impossible to enumerate them, therefore, the present application discloses part of the values to illustrate the technical solutions of the present application, and the above enumerated values should not constitute a limitation on the protection scope of the present application.

[0059] If the terms "first", "second" and the like are used herein to define parts, those skilled in the art should know that the use of "first", "second" is only for the convenience of describing the parts and distinguishing them, and the above terms have no special meaning unless otherwise stated.

[0060] Meanwhile, if the above-mentioned present application discloses or involves parts or structural members that are fixedly connected to each other, unless otherwise stated, the fixed connection can be understood as: detachable fixed connection (for example, connected by bolts or screws), or as: non-detachable fixed connection (for example, riveting, welding), of course, the mutually fixed connection can also be replaced by an integral structure (for example, manufactured by integral forming process) (except for obvious cases that cannot be replaced by integral forming process).

[0061] In addition, the terms used to represent the positional relationship or shape in any of the technical solutions disclosed in the present application include the approximate, similar or close state or shape unless otherwise stated.

[0062] Any component provided by the present application can be assembled from multiple individual components or manufactured as a single component by one-piece forming process.

[0063] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: the specific embodiments of the present application can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application claimed.

Claims

1. A large-area contact type threaded biodegradable magnesium alloy aortic anastomosis device, characterized in that, It includes a conical inner ring, a conical outer ring, and a sleeve outer ring arranged sequentially from the inside to the outside. A blood vessel clamping space is provided between the conical inner ring and the conical outer ring. The conical outer ring and the sleeve outer ring are threaded together. The size of the blood vessel clamping space can be adjusted by rotating the sleeve outer ring and the sleeve outer ring. The outer surface of the tapered 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. The external thread protrusion and the internal thread groove are threadedly engaged. The sleeve outer ring includes a sleeve and an annular base plate. The center of the annular base plate is a through hole. The sleeve and the annular base plate are integral. Multiple limiting holes are provided on the annular base plate of the outer sleeve and on the end face of the conical outer ring; Both the conical outer ring and the sleeve outer ring are limited and rotated using specially made pliers. The specially made pliers include a first plier body and a second plier body. The upper parts of the first plier body and the second plier body are rotatably engaged by a hinge. The upper parts of the first plier body and the second plier body are provided with a semi-circular bend. The semi-circular bend forms a semi-circular groove inside. The openings of the two semi-circular grooves are arranged opposite each other and can be closed to form a circular hole. The lower outer sides of the first plier body and the second plier body are provided with a first handle. Multiple positioning pins are provided on the side of the semi-circular bend. The positioning pins are engaged with the limiting holes of the sleeve outer ring and the conical outer ring. The conical inner ring, conical outer ring, and sleeve outer ring are all made of magnesium alloy.

2. The large-area contact type threaded biodegradable magnesium alloy aortic anastomosis device according to claim 1, 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 angle of the outer wall of the conical inner ring is the same as that of the inner wall of the conical outer ring.

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

4. The large-area contact type threaded biodegradable magnesium alloy aortic anastomosis device according to claim 1, characterized in that, The conical inner ring has a conical inner ring through hole in the middle, and the outer surface of the conical inner ring is the outer conical surface of the conical inner ring.

5. The large-area contact type threaded biodegradable magnesium alloy aortic anastomosis device according to claim 1, characterized in that, The conical outer ring has a conical outer ring through hole in the middle, and the inner wall of the conical outer ring has a conical outer ring inner conical surface.

6. A method of operating a large-area contact type threaded biodegradable magnesium alloy aortic anastomosis device as described in any one of claims 1-5, 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.

Images