Suture-free aortic cannulation device

Abstract

The invention discloses a suture-free aortic cannulation device, comprising an outer sleeve, an inner sleeve, a main body and a surgical blade, wherein a cylindrical boss is arranged on the inner top of the outer sleeve, the inner sleeve is sleeved in a gap between the inner wall of the outer sleeve and the cylindrical boss, the main body is installed in the inner sleeve, and the upper end is pressed against the lower end of the cylindrical boss, the surgical blade is fixedly installed on the bottom surface of the cylindrical boss and is located inside the main body; two symmetrical strip holes are arranged on the upper end of the outer wall of the outer sleeve, a handle is fixedly arranged on the upper end of the outer wall of the inner sleeve, the handle extends out of the strip holes and is in a U shape, the main body is composed of a nickel-titanium alloy bracket and a coating attached to the surface of the nickel-titanium alloy bracket, the main body is in the shape of a hollow cylinder with upper and lower openings, the cannulation device designed by the invention simplifies the surgical steps, is operated by one person, and only needs to perform three operation steps of "piercing, pulling and pulling" to install the main body on the arterial blood vessel, and has simple operation, high efficiency and good safety.

Description

Technical Field

[0001] The invention relates to the technical field of medical surgical instruments, and in particular to a suture-free aortic cannulation device. Background Art

[0002] Vascular cannulation techniques in surgical operations, especially aortic cannulation operations for establishing extracorporeal circulation in cardiac and great vascular surgeries, are currently widely used with single / double purse-string suture techniques at home and abroad: a special surgical round needle suture is used to shallowly suture the adventitia and middle layer of the aorta on the surface of the aorta. The suture can be accompanied by a polyester sheet or a felt sheet to prevent bleeding from the needle eye. The end of the purse-string suture is passed through a rubber or plastic sleeve for standby use. Then an incision is pierced in the purse, and the arterial cannula is inserted into the incision. Finally, the sleeve on the suture is tightened and fixed to achieve the purpose of hemostasis and fixation.

[0003] The following problems exist in the actual application of this technology: 1. The depth of needle insertion is incorrect during purse-string suture, which can easily cause bleeding and arterial hematoma; 2. The size of the purse-string suture or the size of the incision in the purse-string is not appropriate, which can easily cause problems such as purse-string suture breakage, difficulty in intubation, traumatic aortic dissection or bleeding, and postoperative aortic stenosis. The above problems may affect the subsequent surgical process, increase the risk and complication rate of surgery, and in severe cases, endanger the patient's life safety. The above problems have occurred in the career of every cardiovascular surgeon and cannot be avoided in the future. They are more likely to occur in some surgical patients with poor vascular conditions, such as secondary surgery, severe atherosclerosis (porcelain aorta), and thin aortic wall. In addition, in some minimally invasive surgeries, or some surgeries that require emergency establishment of extracorporeal circulation, the probability of the above problems and the severity of the consequences are significantly increased due to poor surgical vision or operator nervousness. Summary of the invention

[0004] The present invention aims to solve the technical problems that the purse-string suture technique used in traditional arterial cannulation operations leads to complicated surgical operations, long operation times and high surgical risks. The technical solution of the present invention can simplify the surgical operation steps and improve the efficiency and safety of the operation.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] A suture-free aortic cannulation device comprises an outer sleeve, an inner sleeve, a main body and a surgical blade, wherein a cylindrical boss is arranged on the top of the outer sleeve, the inner sleeve is sleeved in the gap between the inner wall of the outer sleeve and the cylindrical boss, the main body is installed in the inner sleeve, the upper end of the main body is pressed against the lower end of the cylindrical boss, and the surgical blade is fixedly installed on the bottom surface of the cylindrical boss and is located inside the main body;

[0007] Two symmetrical strip holes are provided at the upper end of the outer wall of the outer sleeve, a handle is fixedly provided at the upper end of the outer wall of the inner sleeve, and the handle extends from the strip hole in a U shape. The main body is composed of a nickel-titanium alloy bracket and a coating attached to the surface of the nickel-titanium alloy bracket. The main body is a hollow cylinder with upper and lower openings. The nickel-titanium alloy bracket is composed of four support bars and a wavy connecting bar fixed around the support bars. Two parasol wings are provided at the lower end of the outer wall of the nickel-titanium alloy bracket, and the parasol wings can be folded. A baffle is provided at the bottom end of the main body, and two pieces are provided on the inner wall of the main body. The one-way valves are mutually engaged, and the one-way valve opening extends downward. The surgical blade includes a handle, a blade head, and a protective cover. The upper end of the handle is fixedly connected to the bottom surface of the cylindrical boss, and the blade head is an A-shaped equilateral triangle, which is fixedly connected to the lower end of the handle. The protective cover is fixedly installed at the connection position between the handle and the blade head. The protective cover opens the one-way valve. The cross-sections of the protective cover at both ends are elliptical, and the cross-section in the middle is circular. The elliptical cross-section gradually increases from bottom to top to the circular cross-section in the middle and then gradually decreases. The upper and lower ends are smoothly connected to the handle and the blade head respectively.

[0008] Preferably, the lower end of the inner sleeve extends out of the lower end of the outer sleeve by 2-5 mm. The lower edge of the inner sleeve and the maximum cross-section of the middle part of the protective sleeve are in the same horizontal plane and fit closely.

[0009] Preferably, a limiting ring is fixedly provided on the lower end of the outer portion of the outer sleeve.

[0010] Preferably, anti-slip strips are provided on the top of the outer sleeve and the inner side of the U-shaped handle.

[0011] Preferably, the distance between the two parachute wings is 1-2 mm.

[0012] Preferably, the opening directions of the two parachute wings are opposite to each other.

[0013] The beneficial effects of the present invention are as follows: the cannulation device designed by the present invention simplifies the surgical steps, and can be operated by one person. The main body can be installed on the arterial blood vessel by only performing the three operation steps of "puncture-pull-pull", and the operation is simple, efficient and safe. During cannulation, the device matching the aortic cannulation model to be used is first selected. After the main body is installed, the cannula is inserted into the artery through the main body. The cannula pushes the one-way valve and the baffle apart in turn. After the cannula is pulled out, the baffle and the one-way valve can block the blood from flowing out, and play a sealing role. The two parachute wings designed by the present invention are clamped on the inner and outer membranes at the incision of the blood vessel, so as to fix and install the main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention.

[0016] Figure 2 It is a three-dimensional structural schematic diagram of the present invention.

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the main body.

[0018] Figure 4 is a schematic cross-sectional view of the main body.

[0019] Figure 5 yes Figure 1 Magnified view of region A shown in FIG.

[0020] In the accompanying drawings, the component names represented by the reference numerals are listed as follows:

[0021] 1-outer sleeve, 2-inner sleeve, 3-main body, 4-surgical blade, 5-cylindrical boss, 6-handle, 7-bar hole, 8-limiting ring, 9-knife head, 10-protective cover, 11-anti-slip strip, 12-nickel-titanium alloy bracket, 13-coating, 14-parachute wing, 15-blocking piece, 16-one-way valve, 17-knife handle, 121-support strip, 122-connecting strip. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1-5 As shown, a suture-free aortic cannulation device comprises an outer sleeve 1, an inner sleeve 2, a main body 3 and a surgical blade 4. A cylindrical boss 5 is arranged on the top of the outer sleeve 1. The inner sleeve 2 is sleeved in the gap between the inner wall of the outer sleeve 1 and the cylindrical boss 5. The main body 3 is installed in the inner sleeve 2, with the upper end resting on the lower end of the cylindrical boss 5. The surgical blade 4 is fixedly installed on the bottom surface of the cylindrical boss 5 and is located inside the main body 3.

[0024] The outer wall upper end of the outer sleeve 1 is provided with two symmetrical strip holes 7, the outer wall upper end of the inner sleeve 2 is fixedly provided with a handle 6, the handle 6 extends from the strip hole 7 and is U-shaped, the main body 3 is composed of a nickel-titanium alloy bracket 12 and a coating 13 attached to the surface of the nickel-titanium alloy bracket 12, the main body 3 is a hollow cylinder with upper and lower openings, the nickel-titanium alloy bracket 12 is composed of four support bars 121 and a wavy connecting bar 122 fixed around the support bar 121, the lower end of the outer wall of the nickel-titanium alloy bracket 12 is provided with two parachute wings 14, the parachute wings 14 can be folded, the bottom end of the main body 3 is provided with a baffle 15, the inner wall of the main body 3 is provided with There are two mutually matched one-way valves 16, and the opening of the one-way valve 16 extends downward. The surgical blade 4 includes a handle 17, a blade head 9, and a protective cover 10. The upper end of the handle 17 is fixedly connected to the bottom surface of the cylindrical boss 5. The blade head 9 is an A-shaped equilateral triangle and is fixedly connected to the lower end of the handle 17. The protective cover 10 is fixedly installed at the connection position between the handle 17 and the blade head 9. The protective cover 10 opens the one-way valve 16. The cross-sections of the protective cover 10 at both ends are elliptical, and the cross-section in the middle is circular. The elliptical cross-section gradually increases from bottom to top to the circular cross-section in the middle and then gradually decreases. The upper and lower ends are smoothly connected to the handle 17 and the blade head 9 respectively.

[0025] The lower end of the inner sleeve 2 extends out of the lower end of the outer sleeve 1 by 2-5 mm. The lower edge of the inner sleeve 2 is in the same horizontal plane and fits with the maximum cross-section of the middle part of the protective sleeve 10. A limit ring 8 is fixedly arranged at the lower end of the outer sleeve 1. An anti-slip strip 11 is arranged on the top of the outer sleeve 1 and the inner side of the U-shaped handle 6. The distance between the two parachute wings 14 is 1-2 mm. The opening directions of the two parachute wings 14 are opposite.

[0026] The specific implementation of the present invention is as follows: at the beginning of the operation, a scalpel is used to sharply incise the skin along the middle of the anterior chest, an electric knife is used to incise the subcutaneous tissue layer by layer, an electric saw is used to saw the sternum along the middle of the sternum, the periosteum is electrocoagulated to stop bleeding, and the cross section of the sternum is used to stop bleeding with bone wax, and after the thorax is opened with a sternal spreader, the pericardium is incised longitudinally in the middle, reaching the folded part of the ascending aorta and the diaphragm, and the lower section of the incision is appropriately extended to both sides for easy exposure. Afterwards, the pericardial cut edge is sutured to the soft tissue outside the bilateral sternum to expose the heart.

[0027] The aortic cannulation operation begins, and the device matching the aortic cannulation model used in the operation is selected. At the intended cannulation location at the distal end of the ascending aorta, the outer sleeve 1 of the present invention is held by the thumb, index finger and middle finger in the same posture as holding a syringe, with the thumb placed on the top of the outer sleeve 1, and the index finger and middle finger placed in the U-shaped handles 6 on both sides. The blade 9 is used to vertically pierce the anterior wall of the ascending aorta to make an incision in the aorta. Since the outer surface of the protective sleeve 10 provided on the blade 9 is an elliptical and circular cross-section that gradually becomes larger, during the incision process, the aortic wall is gradually stretched to both sides of the incision, so that the inner sleeve 2 extends out of the outer sleeve 1 and enters the aorta smoothly. The limiting ring 8 provided at the lower end of the outer sleeve 1 blocks the aortic adventitia to limit the depth of the surgical blade 4 and the inner sleeve 2 entering the aorta. During the insertion of the device into the artery, the thumb pushes the top of the outer sleeve 1 downward, and the index finger and the middle finger forcefully clamp the handle 6 of the inner sleeve 2, and at the same time stick to the lower edge of the U-shaped handle 6, and keep moving synchronously with the thumb, which can prevent the inner sleeve 2 from moving and being blocked outside the blood vessel. When the limit ring 8 at the lower edge of the outer side of the outer sleeve 1 touches the adventitia of the aorta, it means that the inner sleeve 2 has entered the artery. At this time, the thumb continues to apply force downward to ensure that the position of the outer sleeve 1 is fixed, and the index finger and the middle finger turn to the upper edge of the U-shaped handle 6 to apply force, and continue to pull the handle 6 upward to move the inner sleeve 2 upward in the outer sleeve 1. Since the upper end of the main body 3 presses against the bottom surface of the cylindrical boss 5 in the outer sleeve 1, it will not move with the inner sleeve 2, and the cylindrical boss 5 can shorten the length of the main body 3.

[0028] When the handle 6 moves upward to the top of the strip hole 7, it stops moving. At this time, the parachute 14 at the lower end of the main body 3 is fully opened to block the inner wall of the aorta. At this time, the thumb stops applying force, and the index finger and middle finger clamp the handle 6 and continue to apply force to the upper edge of the U-shaped handle 6, pulling up and pulling out the inner sleeve 2 and the outer sleeve 1 at the same time, so that the main body 3 continues to be released from the inner sleeve 2, and the other parachute 14 opens to block the outer wall of the aorta. The inner and outer parachute wings 14 clamp the blood vessel wall to fix it, and the main body 3 is completely released from the gap between the inner sleeve 2 and the protective sleeve 10, so that the main body 3 is installed on the aorta, and the aortic cannula of the required type is inserted from the main body 3 into the aorta, and a strapping tape (sterile) with a self-locking fixing head or The sterile surface thread / thick silk thread is tied to bind and fix the main body 3 and the aortic cannula. The one-way valve 16 provided in the main body 3 allows the cannula to be smoothly inserted into the main body 3. When the cannula is not inserted into the main body 3, the baffle 15 at the lower end of the main body 3 will automatically close and block the opening at the lower end of the main body 3 due to the shape memory function of the nickel-titanium alloy. Combined with the two-leaf one-way valve 16 in the main body 3, the purpose of preventing blood from flowing out is achieved. When the cannula is inserted, the one-way valve 16 and the baffle 15 can be pushed open to insert the cannula. When the cannula is pulled out, the baffle 15 and the one-way valve 16 are automatically closed to prevent blood from flowing out. When installed, the closing direction of the baffle 15 follows the direction of blood flow in the aorta, so that the baffle 15 is tightly closed. After the operation, the umbrella wing 14, the baffle 15 and the inner wall of the blood vessel form a smooth and continuous coating layer, which provides conditions for the later growth of the vascular endothelium.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the invention to only the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification.

Claims

1. A suture-free aortic cannulation device, comprising an outer sleeve (1), an inner sleeve (2), a main body (3) and a surgical blade (4), characterized in that: A cylindrical boss (5) is arranged at the top of the outer sleeve (1); the inner sleeve (2) is sleeved in the gap between the inner wall of the outer sleeve (1) and the cylindrical boss (5); the main body (3) is installed in the inner sleeve (2) with the upper end resting on the lower end of the cylindrical boss (5); the surgical blade (4) is fixedly mounted on the bottom surface of the cylindrical boss (5) and is located inside the main body (3); The outer wall of the outer sleeve (1) is provided with two symmetrical strip holes (7) at the upper end, the outer wall of the inner sleeve (2) is fixedly provided with a handle (6), the handle (6) extends from the strip hole (7) and is U-shaped, the main body (3) is composed of a nickel-titanium alloy support (12) and a coating (13) attached to the surface of the nickel-titanium alloy support (12), the main body (3) is a hollow cylinder with upper and lower openings, the nickel-titanium alloy support (12) is composed of four support bars (121) and a wavy connecting bar (122) fixed around the support bar (121), the lower end of the outer wall of the nickel-titanium alloy support (12) is provided with two parasol wings (14), the parasol wings (14) can be folded, the bottom end of the main body (3) is provided with a baffle (15), the inner part of the main body (3) is provided with a baffle (15), and the inner part of the main body (3) is provided with a baffle (15). The wall is provided with two mutually matched one-way valves (16), the opening of the one-way valve (16) extends downward, the surgical blade (4) comprises a handle (17), a blade head (9), and a protective cover (10), the upper end of the handle (17) is fixedly connected to the bottom surface of the cylindrical boss (5), the blade head (9) is an A-shaped equilateral triangle, and is fixedly connected to the lower end of the handle (17), the protective cover (10) is fixedly installed at the connection position between the handle (17) and the blade head (9), the protective cover (10) opens the one-way valve (16), the cross-sections of the protective cover (10) at both ends are elliptical, and the cross-section in the middle is circular, the elliptical cross-section gradually increases from bottom to top to the circular cross-section in the middle and then gradually decreases, and the upper and lower ends are respectively smoothly connected to the handle (17) and the blade head (9).

2. The suture-free aortic cannulation device according to claim 1, characterized in that: The lower end of the inner sleeve (2) extends out of the lower end of the outer sleeve (1) by 2-5 mm, and the lower edge of the inner sleeve (2) and the maximum cross-section of the middle of the protective sleeve (10) are in the same horizontal plane and fit closely.

3. The suture-free aortic cannulation device according to claim 1, characterized in that: A limiting ring (8) is fixedly provided at the lower end of the outer portion of the outer sleeve (1).

4. The suture-free aortic cannulation device according to claim 1, characterized in that: Anti-slip strips (11) are provided on the top of the outer sleeve (1) and the inner side of the U-shaped handle (6).

5. The suture-free aortic cannulation device according to claim 1, characterized in that: The distance between the two parachute wings (14) is 1-2 mm.

6. The suture-free aortic cannulation device according to claim 1, characterized in that: The opening directions of the two parachute wings (14) are opposite to each other.

Images