Suture-free artificial blood vessel for cardiac surgery

Abstract

The suture-free artificial blood vessel for the cardiac surgery comprises an artificial blood vessel body and bandaging devices located at the two ends of the artificial blood vessel body, each bandaging device comprises a connecting sleeve, a bandaging film and an operation line, the outer wall of one end of each connecting sleeve is smoothly arranged and is inserted into one end of the artificial blood vessel body, and the bandaging film is arranged on the outer wall of the other end of each connecting sleeve. An internal thread groove is formed in the outer wall of the other end of the connecting sleeve and inserted into a blood vessel in a human body, the binding film is wound around the overlapped position of the blood vessel in the human body and the connecting sleeve, and the operation line is wound and bound to the binding film 4 and corresponds to the internal thread groove, so that binding is tighter; the artificial blood vessel further comprises a supporting ring placed on the inner wall of the artificial blood vessel body, the supporting ring plays a role in increasing the hardness of the artificial blood vessel, and follow-up fixing operation is facilitated. The utility model relates to the technical field of biomedical treatment, and particularly provides a suture-free artificial blood vessel for the dirty surgery department.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of biological medical technology, concretely is artificial blood vessel for heart surgery with sutureless. BACKGROUND

[0002] Aortic dissection refers to the blood in the lumen of the aorta entering the aortic media due to aortic intimal tear, causing separation of the true and false lumens of the aorta, and the patient's clinical manifestations are sudden chest pain, syncope and even shock. At present, for acute aortic dissection, surgical intervention is mainly used in clinic. There are currently three mainstream surgical intervention methods, total arch replacement + stent elephant trunk surgery (TAR+FET), hybrid total aortic arch replacement (HAR), and aortic balloon occlusion (ABO). In TAR+FET, whether or not the aortic root needs to be replaced, the doctor needs to complete the suture of various anastomotic stoma as soon as possible to restore circulation as soon as possible, and the descending aorta after FET has a high risk of intraluminal thrombosis and reduction of the covered false lumen. HAR has three types, type I needs to consider the risk of reverse tear of the patient's dissection. ABO has a balloon containing 40-45 mL of physiological saline in the lumen after the stent is implanted, which greatly shortens the time of circulatory arrest and provides sufficient time for the surgeon to suture the blood vessels.

[0003] However, aortic dissection surgery is very risky and difficult, and the most difficult part is to do vascular anastomosis. Because the blood vessels of aortic dissection are high in probability of bleeding after suture, the operation time is long, the hemostasis time is long, and various complications are prone to occur after the operation. Therefore, we urgently need a sutureless artificial blood vessel to solve the above problems.

[0004] In the study of sutureless vascular reconstruction, Ji Shangyi et al. tried to use a steel ring made of medical stainless steel to anastomose the main and pulmonary artery ends and use silk thread to assist in ligating the vascular ends in animal experiments in 2006. It was found that this method could significantly shorten the anastomosis time of large arteries and reduce the bleeding rate. Wang Wei et al. lined a nickel-titanium alloy mesh inside an artificial blood vessel for direct ligation in 2006. It was found in animal experiments that it was well connected with the blood vessels of the experimental animals themselves, but it also raised the problem that the immune reaction caused by the selection of materials might cause necrosis of the anastomosis segment of the body blood vessels, blood gushing, and other reasons causing the displacement of artificial blood vessels, hemodynamic changes, and the formation of false aneurysms. The sutureless fixation research with reference value is the design of "donut + sandwich" combination method for the fixation of umbilical vein catheters by Cheng Liping et al. in 2021. However, this method is mainly used to avoid damage to the umbilical cord caused by invasive operation, and the design of this structure only meets the requirement of exposing the umbilical cord to a natural dry environment. If it is applied to the anastomosis of large blood vessels in the body, many situations such as the selection of dressings need to be considered. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides the following technical scheme: the utility model provides a heart surgery is with free suture artificial blood vessel, including artificial blood vessel body and the bander at both ends of artificial blood vessel body, the bander includes connecting sleeve, bandage film and surgical thread, one end outer wall of connecting sleeve is smooth setting for inserting one end in artificial blood vessel body, the other end outer wall of connecting sleeve is equipped with internal thread groove for inserting in the blood vessel in the human body, the bandage film is wound in the overlapping position of blood vessel in the human body and connecting sleeve, the surgical thread is wound and is bound in bandage film 4 and with internal thread groove corresponds, make the bandage more closely.

[0006] Preferred technical scheme one: still include the support ring of placing in the inner wall of artificial blood vessel body, the support ring play to the role of increasing the hardness for artificial blood vessel, the subsequent fixed operation is convenient.

[0007] Preferred technical scheme two: still include fixed ring one and fixed ring two, the fixed ring one is set in the overlapping position of blood vessel in the human body and connecting sleeve and is located bandage film side, the fixed ring two is set in the overlapping position of artificial blood vessel body and connecting sleeve.

[0008] Preferred technical scheme three: fixed ring one and fixed ring two all have diameter adjusting function, prevent shedding or reduce influence blood flow.

[0009] Preferred technical scheme four: the support ring has diameter adjusting function.

[0010] Preferred technical scheme five: the outer surface of support ring uses the same material with artificial blood vessel body and is wrapped, can avoid the direct contact of support ring and tissue and blood and avoid infection.

[0011] Preferred technical scheme six: the artificial blood vessel body is polytetrafluoroethylene material.

[0012] The heart surgery is with free suture artificial blood vessel provided by the utility model, the beneficial effects obtained by adopting the above structure are as follows:

[0013] (1) by connecting sleeve, bandage film and surgical thread cooperation realizes the connection between artificial blood vessel body and blood vessel in the human body, free suture, the other end outer wall of connecting sleeve is equipped with internal thread groove and makes the bandage more closely.

[0014] (2) the fixed ring one, fixed ring two and support ring cooperation further support and fix artificial blood vessel body and blood vessel in the human body, increase the stability of connection. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of the sutureless artificial blood vessel for cardiac surgery proposed in this utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the overall structure of the sutureless artificial blood vessel for cardiac surgery proposed in this utility model. Figure 2 ;

[0018] Figure 3 for Figure 2 A magnified view of part A.

[0019] Among them, 1. artificial blood vessel body, 2. bandaging device, 3. connecting sleeve, 4. bandaging film, 5. surgical suture, 6. internal thread groove, 7. human body blood vessel, 8. support ring, 9. fixing ring one, 10. fixing ring two. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0022] Example 1

[0023] like Figures 1 to 3 As shown, the technical solution adopted by this utility model is as follows: a sutureless artificial blood vessel for cardiac surgery, including an artificial blood vessel body 1 and bandages 2 located at both ends of the artificial blood vessel body 1. The bandages 2 include a connecting sleeve 3, a bandaging film 4 and a surgical suture 5. One end of the connecting sleeve 3 has a smooth outer wall and is inserted into one end of the artificial blood vessel body 1. The other end of the connecting sleeve 3 has an internal thread groove 6 on its outer wall and is inserted into a blood vessel 7 in the human body. The bandaging film 4 is wrapped around the overlapping position of the blood vessel 7 in the human body and the connecting sleeve 3. The surgical suture 5 is wrapped and tied around the bandaging film 4 and corresponds to the internal thread groove 6, making the bandage tighter. The artificial blood vessel body 1 is made of polytetrafluoroethylene.

[0024] The preferred technical solution one: further comprising a support ring 8 placed in the inner wall of the artificial blood vessel body 1, the support ring 8 plays a role in increasing the hardness of the artificial blood vessel, facilitating the subsequent fixing operation, the support ring 8 has a diameter adjusting function;

[0025] The outer surface of the support ring 8 is wrapped with the same material as the artificial blood vessel body 1, which can avoid direct contact between the support ring 8 and the tissue and blood to avoid infection.

[0026] Embodiment two

[0027] Based on the embodiment one, as shown in Figure 1 and Figure 3 The preferred technical solution two: further comprising a fixed ring one 9 and a fixed ring two 10, the fixed ring one 9 is sleeved at the overlapping position of the human body blood vessel 7 and the connecting sleeve 3 and located on one side of the bandage film 4, the fixed ring two 10 is sleeved at the overlapping position of the artificial blood vessel body 1 and the connecting sleeve 3; the fixed ring one 9 and the fixed ring two 10 both have a diameter adjusting function to prevent falling off or shrinking to affect blood flow.

[0028] In specific use, first, use Blender, nomad and other traditional modeling software to make 3D modeling of the model. And make disassembly animation and demonstration animation on the basis of 3D modeling; purchase eFTE to prepare the artificial blood vessel body 1, and customize the finished support ring 8; after assembly, use pig heart to simulate human heart for ex vivo perfusion simulation. According to the simulation results, further improve the model, complete the final shaping, and use the connecting sleeve 3 inner thread groove 6 one end inserted into the human body blood vessel 7, and the bandage film 4, through the surgical thread 5 winding tied on the bandage film 4 and corresponding to the inner thread groove 6, make the bandage more closely, through the fixed ring one 9 and the fixed ring two 10 to reinforce the connecting position, the other end of the artificial blood vessel body 1 is connected through the same way.

[0029] It should be noted that in this text, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "include", "contain" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, material or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, material or equipment.

[0030] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sutureless artificial blood vessel for cardiac surgery, comprising a blood vessel body (1) and a wrapping device (2) at both ends of the blood vessel body (1), characterized in that: The wrapping device (2) comprises a connecting sleeve (3), a wrapping film (4) and a surgical thread (5), one end of the connecting sleeve (3) is provided with a smooth outer wall and is inserted into one end of the artificial blood vessel body (1), the other end of the connecting sleeve (3) is provided with an internal thread groove (6) and is inserted into the blood vessel (7) in the human body, the wrapping film (4) is wound at the overlapping position of the blood vessel (7) in the human body and the connecting sleeve (3), and the surgical thread (5) is wound and bound on the wrapping film (4) and corresponds to the internal thread groove (6).

2. The sutureless artificial blood vessel for cardiac surgery according to claim 1, characterized by: The support ring (8) placed on the inner wall of the artificial blood vessel body (1) is further included.

3. The cardiac surgical sutureless vascular prosthesis according to claim 2, characterized in that: The fixed ring one (9) and the fixed ring two (10) are further included, the fixed ring one (9) is sleeved at the overlapping position of the blood vessel (7) in the human body and the connecting sleeve (3) and is located on one side of the wrapping film (4), and the fixed ring two (10) is sleeved at the overlapping position of the artificial blood vessel body (1) and the connecting sleeve (3).

4. The cardiac surgical suturing-free artificial blood vessel according to claim 3, characterized by: The fixed ring one (9) and the fixed ring two (10) both have a diameter adjusting function.

5. The cardiac surgical suturing-free artificial blood vessel according to claim 4, characterized by: The support ring (8) has a diameter adjusting function.

6. The cardiac surgical suturing-free artificial blood vessel according to claim 5, characterized by: The outer surface of the support ring (8) is wrapped with the same material as the artificial blood vessel body (1).

7. The cardiac surgical suturing-free artificial blood vessel according to claim 6, characterized by: The artificial blood vessel body (1) is made of polytetrafluoroethylene.

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