Aortic anastomosis device with collapsible sleeve and graft

Abstract

A medical implant device for proximal and distal anastomosis of the aorta is provided. The device is designed to facilitate connection between the aorta and the device, and the size of the two ends of the device is smaller than that of the aorta by one. The device is characterized in that protruding parts are arranged at the positions about 8 mm away from the two ends of the device, and the protruding parts are specially designed to be used for assisting installation of suture rings and used for tightening the aorta and blocking blood flow between the device and the aorta respectively. Once heated or in contact with blood, the constriction sleeve tightly secures the blood vessel and device before and after the protrusions. The design of the device aims to simplify the anastomosis process, reduce the time and skills required by the surgeon to perform the procedure, and improve the overall safety and effectiveness of the anastomosis.

Description

Technical Field

[0001] This device is designed to connect the proximal and distal ends of the aorta after surgeries such as "frozen elephant trunk," Stanford A, or Stanford B. Instead of sutures for anastomosis, it uses a protruding design, a constricting cannula, and a graft to secure the connection. Furthermore, suture loops are placed anterior and posterior to the protrusions at both ends of the aorta to form a strong connection. The constricting cannula passes through the blood vessel and the device and contracts upon temperature changes.

[0002] The aorta has the capacity to stretch and dilate, adapting to changes in blood pressure during the cardiac cycle. Typically, the aorta can dilate to approximately 10%-20% of its original diameter based on pressure changes during systole and diastole. For example, if the original diameter of the aorta during diastole is 3 cm (30 mm), it may dilate to approximately 3.3-3.6 cm (33-36 mm) during systole, an increase in diameter of 10%-20%.

[0003] The graft is used to wrap the cylindrical tube of the device with suture loops to ensure that both ends of the aorta are physically fixed and tightened. This method provides an alternative to traditional suturing techniques, enabling a more convenient and precise connection between the two ends of the aorta. Background Technology

[0004] Since the birth of cardiovascular surgery, surgeons have followed the principles of suturing techniques, relying on hand-held sutures to perform proximal and distal anastomoses. However, in recent years, a number of new technologies and methods have been developed and researched, aiming to achieve sutureless vascular anastomosis, which is expected to pave the way for the widespread application of sutureless vascular surgery in the future.

[0005] Vascular anastomosis is the process of connecting two blood-carrying vessels, mainly divided into end-to-end anastomosis and end-to-side anastomosis. Typically, vascular anastomosis uses traditional suturing techniques, which are widely considered the "gold standard" in cardiovascular surgery. However, in surgeries involving diseased arteries, with limited surgical access, or requiring small incisions, manual suturing can be challenging and time-consuming. Such procedures require significant technical expertise and effort.

[0006] To ensure rapid and reliable recovery for high-risk surgical patients, there is an urgent need for convenient, fast, safe, and reliable sutureless techniques. Therefore, developing novel sutureless techniques is crucial for improving patient outcomes and advancing the field of cardiovascular surgery. Summary of the Invention

[0007] This invention introduces an innovative device, namely an aortic anastomosis device with a constricting cannula and graft, for achieving sutureless anastomosis, potentially providing an alternative to vascular anastomosis surgery. The device is designed to offer several key advantages, including eliminating the need for sutures, shortening operation time, improving safety, enhancing reliability, increasing patency rates, and improving the stability of vascular anastomosis.

[0008] Specifically, the aortic anastomosis device with a shrinkable cannula and graft promises to revolutionize the field of vascular anastomosis surgery by eliminating the need for sutures. Using this device can shorten surgical procedures, save time, and reduce associated risks. Furthermore, the device is designed as a safe and reliable alternative to traditional suture techniques.

[0009] Another significant advantage of aortic anastomosis devices with constricting cannulas and grafts is their ability to improve anastomotic patency. This means that blood flow at the anastomosis site is less likely to be obstructed, contributing to better healing and recovery for the patient. Simultaneously, the device provides greater stability to the anastomosis, reducing the risk of leakage or other complications that may occur with traditional suture techniques.

[0010] In summary, the aortic anastomosis device with constricting cannula and graft represents a significant advancement in vascular anastomosis surgery. Its unique design and characteristics offer numerous advantages over traditional suture techniques, making it a valuable tool for surgeons and an effective treatment option for patients. The aortic anastomosis device with constricting cannula and graft comprises a 40 mm long cylindrical tube with protrusions at both ends. The constricting cannula passes through both ends of the tube, and the graft is secured to both ends of the tube by suture loops. The device is made of polymer. Brief description of the attached figures The embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

[0011] Figure 5: The longitudinal section shows the tube (1,2) used to connect the proximal (3) and distal (4) ends of the aorta, with protrusions at both ends.

[0012] The tube (1,2) is 40 mm long and 0.5 mm to 1 mm thick.

[0013] The protrusions are located about 8 mm from both ends of the tube, with a height of 1 to 2 mm.

[0014] The outer diameter of the tube with protrusions (1,2) is slightly larger than that of the proximal (3) and distal (4) ends of the aorta, while the outer diameter of the tube without protrusions is slightly smaller. This size difference facilitates the aorta being fitted over the tube.

[0015] Shrink sleeves (9,10) are installed at the front and rear positions of the protrusions on the tube body (1,2). These sleeves shrink upon heating or contact with blood, securing them firmly to the tube body (1,2).

[0016] In addition, the tube body (1,2) is wrapped with grafts (11,12) to protect the shrink tube (9,10) when the suture rings are tightened on the tube body before and after the protrusion.

[0017] Figure 6: To ensure a secure connection between the aorta and the cylindrical tube (1,2), two to three suture rings (5,6,7,8) are placed at both ends of the tube (1,2), both before and after the protrusions. To further prevent the blood vessel from detaching from the cylindrical tube (1,2), the two ends of the blood vessel (3,4) should be sutured in place. Specific Implementation This invention discloses an innovative medical implant for proximal and distal aortic anastomosis. The advanced device has ends smaller than the aorta, facilitating aortic insertion.

[0018] The device features unique protrusions located approximately 8 millimeters at each end. These protrusions prevent blood from flowing between the device and the aorta, ensuring safe and efficient blood circulation through the aorta.

[0019] The shrinkable cannula is installed at the front and rear of the protrusion. It contracts upon heating or contact with blood, firmly securing the blood vessel to the device. Suture rings are placed at both the front and rear of the protrusion to ensure a secure connection, and the graft protects the shrinkable cannula after the suture rings tighten.

[0020] This device represents a groundbreaking innovation in the field of medical implants and has the potential to revolutionize anastomosis surgery. Its design balances efficiency, efficacy, and patient safety.

Claims

1.1 A cylindrical tube with a length of 40 mm; 1.2 Protrusions located 8 mm from both ends of the cylindrical tube; 1.3 During the anastomosis process, the protrusion serves as a mark or indicator of correct alignment; 1.4 The two ends of the cylindrical tube are smaller than the two ends of the aorta, so that the aorta can be easily fitted onto the device; 1.5 The protrusion is designed to be larger than the aorta in order to effectively block blood flow between the device and the aorta; 1.6 Place suture loops with a height of 1 mm before and after the protrusion; 1.7 The device is made of titanium; 1.8 The device is made of nickel-titanium; 1.9 The device is made of polymer. Claim 2: Enhanced stability The protrusion of the cylindrical tube according to claim 1 can improve stability and effectively prevent detachment under normal blood flow conditions. Claim 3: suture loop integration The device of claim 1 integrates suture rings before and after the protrusion, enabling firm attachment of blood vessels. Claim 4: Preventing shedding The design of the cylindrical tube, the protrusion, the shrink sleeve, the graft, and the suture ring as described in claim 1 ensures that the cylindrical tube body will not detach from the blood vessel. Claim 5: Securely fixed The two ends of the blood vessel are sutured to the cylindrical tube using the suture described in claim 1 to form a safe and reliable connection. Claim 6: Risk minimization The device design and suturing technique described in claim 1 reduce the risk of complications associated with the aneurysm anastomosis process, including but not limited to leakage or detachment. Claim 7: Simplified surgical procedure The novel device of claim 1 simplifies the aneurysm anastomosis procedure by providing a method for firmly fixing blood vessels without affecting stability. Claim 8: Improve patient prognosis Using the device of claim 1 can reduce the risk of complications, promote successful aneurysm repair, and thus improve patient prognosis. Claim 9: Compatibility The device of claim 1 adopts a cylindrical main body design, which is compatible with minimally invasive surgical techniques. Claim 10: Biocompatibility The aneurysm anastomosis device of claim 1 has a cylindrical tube with a coating or surface treatment to enhance biocompatibility and reduce the risk of thrombosis.

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