Absorbable vein anastomosis auxiliary device

Abstract

The utility model relates to an absorbable vein anastomosis auxiliary device which comprises an inner sleeve and two semi-circle segments, the inner wall of the inner sleeve is smooth, the outer wall of the inner sleeve is rough, and the inner sleeve is used for butt joint of the ends of two sections of vein blood vessels to be anastomosed; the inner wall and the outer wall of each half-cycle segment are rough, and the two half-cycle segments are used for clamping and fixing the overlapped and butted parts of two sections of vein blood vessels from the outside; wherein the inner sleeve and the semi-circle pipe piece are both made of degradable absorbing materials. By means of a mechanical anastomosis mode, anastomosis time can be greatly shortened, meanwhile, due to uniform operation, the occurrence rate of vascular related complications can be reduced, the learning curve of surgeons is shortened, operation time is greatly shortened, the operation effect is improved, and operation risks are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical apparatus and instruments, and particularly relates to an absorbable vein anastomosis auxiliary device. BACKGROUND

[0002] At present, vein vessel anastomosis adopts needle and line suture technology in the surgical operation process, and a long time is often consumed, and due to the difference in suture level and experience of surgeons, anastomosis narrow, thrombus, bleeding and other complications appear with different probability after anastomosis, leading to poor prognosis of patients. UTILITY MODEL CONTENT

[0003] The utility model aims at providing an absorbable vein anastomosis auxiliary device to solve the above problems.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] An absorbable vein anastomosis auxiliary device can include:

[0006] An inner sleeve, the inner wall of the inner sleeve is smooth, and the outer wall is rough, the inner sleeve is used to butt joint the end of two vein vessels to be anastomosed, and

[0007] Two half-week pipe pieces, the inner and outer walls of the half-week pipe piece are rough, and two half-week pipe pieces are used to clamp and fix the coincident butt joint part of two vein vessels from the outside;

[0008] Wherein, the inner sleeve and the half-week pipe piece are made of degradable absorbable material.

[0009] In an embodiment, the outer wall of the inner sleeve and the inner and outer walls of the half-week pipe piece all have regular texture.

[0010] In an embodiment, the circumferential two ends of the half-week pipe piece are provided with a plurality of radially extending fixing ears.

[0011] In an embodiment, the circumferential two ends of two half-week pipe pieces are provided with clamping structures that butt joint each other.

[0012] In an embodiment, the clamping structure includes a plurality of clamping grooves and a plurality of buckles, wherein the clamping grooves and the buckles are respectively arranged on the two butt joint circumferential ends or are arranged on the same circumferential end.

[0013] In an embodiment, one end of two half-week pipe pieces is pivoted, so that two half-week pipe pieces can rotate relatively to realize opening and closing.

[0014] In an embodiment, one half-week pipe piece is pre-embedded with a plurality of suture lines extending out of both ends by a predetermined length in the circumferential direction, and the circumferential two ends of the other half-week pipe piece are pre-embedded with corresponding suture line rings.

[0015] In an embodiment, the inner sleeve has a wall thickness of 0.3-1.0 mm and a length of 1.0-3.0 cm.

[0016] In an embodiment, the outer wall of the half-tube piece is provided with a plurality of circumferentially extending grooves.

[0017] In an embodiment, the degradable absorbable material comprises polylactic-glycolic acid copolymer, polylactic acid, levorotatory polylactic acid, polycaprolactone, polyanhydride, polycarbonate, polyhydroxyalkyl methacrylate, keratin, silk fibroin, collagen, cellulose, chitin and chitosan.

[0018] In an embodiment, the inner sleeve and the half-tube piece are both made by 3D printing.

[0019] The technical scheme has the beneficial effects that: by the mechanical anastomosis mode, the anastomosis time can be greatly shortened, the occurrence rate of blood vessel related complications can be reduced due to the uniform operation, the learning curve of a surgeon is shortened, the operation time is greatly shortened, the operation effect is improved, and the operation risk is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of the absorbable vein anastomosis auxiliary device of the first embodiment of the utility model.

[0021] Figure 2 is Figure 1 the schematic view of the use of the absorbable vein anastomosis auxiliary device shown in the figure.

[0022] Figure 3 is Figure 2 the enlarged view of A in the figure.

[0023] Figure 4 is the schematic view of the cross section along the B-B line in the figure. Figure 2

[0024] Figure 5 is the schematic view of the half-tube piece of the absorbable vein anastomosis auxiliary device of the second embodiment of the utility model, wherein two half-tube pieces are pivotally connected.

[0025] Figure 6 is the schematic view of the half-tube piece of the absorbable vein anastomosis auxiliary device of the third embodiment of the utility model.

[0026] Figure 7 is the schematic view of the half-tube piece of the absorbable vein anastomosis auxiliary device of the fourth embodiment of the utility model.

[0027] Figure 8 ​is a schematic view of the half-week pipe sheet of the absorbable venous anastomosis auxiliary device of the fifth embodiment of the utility model.

[0028] The list of signs: 100, vein blood vessels;1, inner sleeve;2, half-week pipe sheet;21, fixed ear;22, recess;23, clamping groove;24, buckle;25, suture;26, suture ring. DETAILED DESCRIPTION

[0029] The preferred embodiments of the utility model will be described in detail below with reference to the drawings, so that the purpose, characteristics and advantages of the utility model can be more clearly understood. It should be understood that the embodiments shown in the drawings are not a limitation on the scope of the utility model, but only to illustrate the essential spirit of the technical scheme of the utility model.

[0030] In the following description, for the purpose of illustrating various disclosed embodiments, specific details are set forth in order to provide a thorough understanding of various disclosed embodiments. However, one skilled in the relevant art will recognize that embodiments can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail in order to avoid obscuring the description of embodiments.

[0031] Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".

[0032] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrase "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0033] As used in this specification and the appended claims, the singular forms "a", "an" and "the" include plural referents unless the content clearly dictates otherwise. It should be noted that the term "comprising" typically is used in its inclusive sense as opposed to an exclusive or exhaustive sense that would require one embodiment to be made up only of the components of that embodiment.

[0034] In the following description, in order to clearly show the structure and working mode of the utility model, many directional words will be used for description, but the words of "front", "back", "left", "right", "outer", "inner", "outward", "inward", "up", "down" and the like should be understood as convenient words, and should not be understood as limiting words.

[0035] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0036] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0037] like Figure 1 As shown, an absorbable venous anastomosis auxiliary device may include an inner sleeve 1 and two semi-circumferential tube segments 2. The inner wall of the inner sleeve 1 is smooth to reduce resistance, and the outer wall is rough to increase the friction between the blood vessel and the outer wall of the inner sleeve. The inner sleeve 1 is used to connect the ends of two sections of venous blood vessels to be anastomosed. The inner and outer walls of the semi-circumferential tube segment 2 are rough to increase the friction between the blood vessel and the inner wall of the semi-circumferential tube segment 2, as well as the friction between the suture and the outer wall of the semi-circumferential tube segment. The two semi-circumferential tube segments 1 are the same size and can be combined into a complete circular tube. The two semi-circumferential tube segments 2 are used to clamp and fix the overlapping connecting parts of the two sections of venous blood vessels from the outside. The inner sleeve 1 and the semi-circumferential tube segment 2 are both made of degradable absorbent material. The degradable absorbent material can be a polyester polymer such as polylactic-co-glycolic acid (PLGA), polylactic acid (PLA), poly(L-lactic acid) (PLLA), polycaprolactone (PCL), polyanhydride (PAD), polycarbonate (PC), or polyhydroxyalkyl methacrylate; a protein material such as keratin, fibroin, or collagen; a polysaccharide material such as cellulose, chitin, or chitosan; or other medical materials. Preferably, both the inner sleeve 1 and the semi-circumferential segment 2 can be made of PLGA via 3D printing. It should be understood that the inner sleeve 1 and the semi-circumferential segment 2 can also be manufactured using an integral molding process such as injection molding or extrusion molding. The circumferential ends of the semi-circumferential segment 2 (hereinafter referred to as the upper and lower ends) are each provided with a plurality (three shown) of radially extending fixing ears 21. During use, the two semi-circumferential segments 2 can be tied together by passing degradable surgical sutures through the fixing ears 21. It should be understood that the semi-circumferential segments 2 can also be directly tied together with sutures without fixing ears 21.

[0038] Figure 2The use schematic view of the absorbable vein anastomosis auxiliary device is shown. The specific steps are as follows: 1, the proximal end (also called the first segment of the vein) of the vein blood vessel 100 passes through the inside of the inner sleeve 1, closely adheres to the inner wall of the inner sleeve 1, and the blood vessel wall is everted on the outer wall of the inner sleeve 1; 2, the distal end (also called the second segment of the vein) of the vein blood vessel 100 is sleeved on the outer wall of the inner sleeve, and covers the everted part of the proximal end of the blood vessel; 3, two half-week pipe sheets 2 tightly press the overlapping position (that is, the position to be anastomosed) of the two segments of the vein (that is, the proximal end of the blood vessel and the distal end of the blood vessel); 4, the two half-week pipe sheets 2 are tightly bound by using the degradable surgical suture thread passing through the fixing ear 21, so as to fix the blood vessel and complete the anastomosis of the blood vessel. As shown in Figure 3 and Figure 4 As shown, the inner sleeve 1 is clamped between the proximal end of the blood vessel and the everted part of the proximal end of the blood vessel, and does not directly contact with the blood, so as not to affect the blood coagulation system. The whole process does not need to suture the vein blood vessel, is simple to operate, saves the operation time, simultaneously adopts the mechanical anastomosis mode, realizes the uniform anastomosis, shortens the learning curve of the surgeon, and reduces the operation difficulty of the anastomosis of the blood vessel; and the biological safety is high, the material is degradable, and the degradation time is controllable; the blood flow can be quickly reconstructed, the ischemia and injury of the organ are reduced; the leakage is prevented, and the postoperative complications are reduced.

[0039] Preferably, the outer wall of the inner sleeve 1 and the inner and outer walls of the half-week pipe sheet 2 all have regular textures, for example, circumferential (transverse) stripes, axial (longitudinal) stripes, convex point arrays or concave pit arrays and the like, so as to increase the friction. The regular textures can be conveniently manufactured.

[0040] The size of the inner sleeve 1 and the half-week pipe sheet 2 can be determined according to the type of the vein blood vessel to be connected and the degradation time. Generally, the wall thickness and the length of the inner sleeve 1 and the half-week pipe sheet 2 can be the same, for example, the wall thickness is 0.3-1 mm, and the length is 1-3 cm. The outer diameter of the inner sleeve 1 matches the size of the vein blood vessel to be connected, for example, for the portal vein, the outer diameter is generally about 1.0 cm, and for the inferior vena cava, the outer diameter is generally about 2.0 cm. The inner diameter of the half-week pipe sheet 2 is generally larger than the outer diameter of the inner sleeve 1 by about one time of the thickness of the vein blood vessel wall, that is, about 2 mm.

[0041] Figure 5 The structure of the half-week pipe sheet 2 of the absorbable vein anastomosis auxiliary device of the second embodiment of the utility model is shown. In this embodiment, one end (circumferential end) of the two half-week pipe sheets 2 is pivoted (for example, similar to a hinge structure), so that the two half-week pipe sheets 2 can rotate relative to each other to realize opening or closing. In use, the two half-week pipe sheets 2 are sleeved on the butt joint overlapping part of the two segments of the vein blood vessel after being opened, and then are closed and tightly bound by the degradable surgical suture thread passing through the fixing ear 21, which is very convenient and greatly improves the operation efficiency.

[0042] Figure 6The structure of the semi-circular tube sheet 2 of the absorbable vein anastomosis auxiliary device of the third embodiment of the present application is shown. In this embodiment, the circumferential two ends of the two semi-circular tube sheets 2 are provided with clamping structures that are butted to each other, and the clamping structures are used. Specifically, the circumferential two ends of one of the semi-circular tube sheets 2 are provided with a plurality of clamping grooves 22, and the circumferential two ends of the other semi-circular tube sheet 2 are provided with a plurality of buckles 23. The clamping grooves 22 can be rectangular holes or circular holes, and correspondingly, the buckles 23 can be rectangular hooks or spherical buckles. It should be understood that the clamping grooves 22 and the buckles 23 can be arranged at the circumferential ends of one semi-circular tube sheet 2, or the clamping grooves 22 and the buckles 23 can be arranged on the two circumferential ends of one semi-circular tube sheet 2. When in use, the buckles 23 are clamped into the clamping grooves 22 to fix the blood vessels, which is very convenient and greatly improves the operation efficiency. It should be understood that in order to ensure that the two semi-circular tube sheets 2 will not be separated before the blood vessels are anastomosed, the two semi-circular tube sheets 2 can also be bundled and reinforced with degradable surgical sutures.

[0043] In a variant of this embodiment, one end (circumferential end) of the two semi-circular tube sheets 2 is hinged together, and the other end is provided with a clamping structure to facilitate operation.

[0044] Figure 7 The structure of the semi-circular tube sheet 2 of the absorbable vein anastomosis auxiliary device of the fourth embodiment of the present application is shown. In this embodiment, a plurality of (three shown) circumferentially extending grooves 24 are provided on the outer wall of the semi-circular tube sheet 2, and the grooves 24 are used to receive degradable surgical sutures to facilitate the bundling of the two semi-circular tube sheets 2 together. When in use, the sutures are bundled along the grooves 24, which can avoid slippage of the sutures, improve work efficiency, and at the same time ensure tight and secure bundling. Similarly, in a variant of this embodiment, one end (circumferential end) of the two semi-circular tube sheets 2 can also be hinged together to facilitate operation.

[0045] Figure 8 The structure of the semi-circular tube sheet 2 of the absorbable vein anastomosis auxiliary device of the fifth embodiment of the present application is shown. In the above embodiments, the degradable surgical sutures are independent of the semi-circular tube sheets. In this embodiment, one semi-circular tube sheet 2 is pre-embedded with a plurality of circumferentially extending sutures 25 that extend out of both ends by a predetermined length (for example, 2.0-5.0 cm), and the other semi-circular tube sheet is pre-embedded with corresponding suture loops 26 on the circumferential two ends. When in use, the sutures 25 only need to be tightened on the suture loops 26 to achieve blood vessel fixation, which is very convenient. It should be understood that both semi-circular tube sheets can use pre-embedded sutures.

[0046] Similarly, in a variant of this embodiment, one end (circumferential end) of the two semi-circular tube sheets 2 can also be hinged together to facilitate operation.

[0047] The preferred embodiments of the present application have been described in detail above, but it should be understood that various modifications and changes can be made to the present application by those skilled in the art after reading the above teaching of the present application. These equivalent forms also fall within the scope of the appended claims of the present application.

Claims

1. An absorbable venous anastomosis auxiliary device, characterized in that: include: An inner cannula, wherein the inner wall of the inner cannula is smooth and the outer wall is rough, and the inner cannula is used to connect the ends of two sections of venous blood vessels to be anastomosed; as well as Two semi-circumferential segments, both inner and outer walls of the semi-circumferential segments being rough, and the two semi-circumferential segments being used to clamp and fix the overlapping butt joint portions of the two venous blood vessels from the outside; Wherein, the inner sleeve and the semi-circumferential tube segment are both made of degradable absorbent material.

2. The absorbable venous anastomosis assist device according to claim 1, characterized in that: The outer wall of the inner sleeve and the inner and outer walls of the semi-circumferential tube segments all have regular textures.

3. The absorbable venous anastomosis assist device according to claim 1, wherein: A plurality of radially extending fixing ears are provided at both circumferential ends of the semi-circumferential tube segment.

4. The absorbable venous anastomosis assist device according to claim 1, wherein: Both ends of the two half-circumferential tube segments in the circumferential direction are provided with a clamping structure that butts against each other.

5. The absorbable venous anastomosis assist device according to claim 4, characterized in that: The clamping structure includes a plurality of clamping slots and a plurality of clamping buckles, wherein the clamping slots and the clamping buckles are respectively arranged on two butted circumferential ends or are arranged at intervals on the same circumferential end.

6. The absorbable venous anastomosis assist device according to claim 1, wherein: One end of the two semi-circumferential tube segments is pivotally connected so that the two semi-circumferential tube segments can rotate relative to each other to achieve opening and closing.

7. The absorbable venous anastomosis assist device according to claim 1, wherein: The outer wall of the semi-circumferential tube segment is provided with a plurality of circumferentially extending grooves.

8. The absorbable venous anastomosis assist device according to claim 1, wherein: One of the half-circumference tube segments is pre-embedded with a plurality of sutures extending circumferentially to predetermined lengths at both ends, and the other half-circumference tube segment is pre-embedded with corresponding suture rings at both circumferential ends.

9. The absorbable venous anastomosis assist device according to claim 1, wherein: The degradable absorbent material includes polylactic acid-co-glycolic acid, polylactic acid, poly(L-lactic acid), polycaprolactone, polyanhydride, polycarbonate, polyhydroxyalkyl methacrylate, keratin, silk fibroin, collagen, cellulose, chitin and chitosan.

10. The absorbable venous anastomosis assist device according to claim 1, wherein: The inner sleeve and the semi-circumferential tube segments are both made by 3D printing.

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