Beveled tubular stapler

Abstract

The present invention is a beveled tubular stapler, the main body of which is a tubular stapler. The bottom surface of the anvil of the tubular stapler and the top surface of the staple cartridge cooperate with each other to form an anastomosis surface for anastomosing tissues. The anastomosis surface is divided into a low plane and a high plane perpendicular to the direction of travel of the anvil, and an anastomosis slope inclined relative to the low plane and the high plane. The low plane is connected to the lowest point of the anastomosis slope, and the high plane is connected to the highest point of the anastomosis slope. The present invention effectively solves the technical defects of the current beveled stapler, which greatly increases the defective rate of nail formation due to the lack of nail pits at points 11-1 and 5-7. This allows the beveled stapler to drive perfect "B"-shaped nails at any position, just like ordinary tubular anastomosis. At the same time, it also retains the advantages of the original beveled anastomosis, avoiding obstruction and blockage of the intestinal tract.

Description

Technical Field

[0001] The present invention relates to the use of medical equipment, in particular to a bevel tube-type anastomosis device. Background Art

[0002] Currently, disposable tubular staplers are used in digestive tract reconstruction surgeries to suture the intestinal tracts that need to be connected. The working principle of a disposable tubular stapler is similar to that of a stapler. The disposable digestive tract stapler drives two staggered rows of staples arranged in a circular pattern into the digestive tract tissue, while simultaneously severing the inner tissue with a cutting blade. This device makes it easy to anastomose tubular organs. During operation, the stapler pushes the staples out of the stapler magazine, where they are formed into a "B" shape by the anvil guide groove. The cutting blade then severs the stapled tissue, completing the anastomosis.

[0003] The existing technology has defects and reasons: the anastomotic component of the existing tubular stapler is flat-headed. After anastomosis, a circle of inelastic annular connection is formed in the intestine. The tissue grows flesh into the intestine, forming a whole circle of scars, which can easily cause intestinal stenosis, making it difficult for food or feces to pass through, or even blockage. A second operation is required, which brings great pain and financial burden to the patient. For this reason, as early as the 1990s, surgeons proposed the concept of a beveled tubular stapler: the anastomotic component includes a stapler seat and a staple compartment. The stapler seat and the staple compartment are both provided with bevels that can be anastomosed with each other, and the staple compartment is provided with staples and annular knives that are flush with the bevels. The anastomotic surfaces of the stapler seat and the staple compartment of this beveled tubular stapler are beveled. After suturing, the suture surface on the intestine also becomes inclined. In the radial direction of the intestinal staple, each cross section has only two scar points instead of a circle of scars, thereby ensuring the elasticity of the original intestine and avoiding intestinal obstruction and blockage. Although the beveled stapler has obvious advantages in clinical practice, the existing technology has defects: such as Figure 1-5 As shown in the figure, the mating surface is an inclined surface, and the nail pits at the 11-1 o'clock and 5-7 o'clock positions are incomplete, that is, the nail pits are missing. Facts have shown that the missing nail pits at the 11-1 o'clock and 5-7 o'clock positions greatly increase the defective rate of nail formation. Summary of the Invention

[0004] The present invention is a beveled tube-type anastomosis device, which has two main purposes:

[0005] Purpose 1: It can improve the defects of missing nail pits at the high and low positions of the traditional bevel, while retaining the advantages of the bevel stapler and reducing the anastomosis defect rate.

[0006] Purpose 2: To ensure that the improved anvil and the nail magazine are quickly and correctly connected, thereby improving the installation efficiency of the anvil.

[0007] The present invention is achieved through the following technical solution: a beveled tubular stapler, whose main body is a tubular stapler, the bottom surface of the anvil of the tubular stapler and the top surface of the staple cartridge cooperate with each other to form an anastomosis surface for anastomosing tissues, the anastomosis surface is divided into a low plane and a high plane perpendicular to the direction of travel of the anvil, and an anastomosis slope inclined relative to the low plane and the high plane, the low plane is connected to the lowest point of the anastomosis slope, and the high plane is connected to the highest point of the anastomosis slope.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] 1. It effectively addresses the current technical flaw of beveled staplers, which significantly increases the rate of defective nail formation due to missing staple pits at the 11-1 and 5-7 points. This allows the beveled stapler to deliver perfect "B"-shaped staples at any position, just like conventional tubular staplers. It also retains the advantages of the original beveled stapler, preventing intestinal obstruction and blockage.

[0010] 2. The addition of a guiding structure allows the anvil to be perfectly aligned and positioned in the correct position of the staple cartridge assembly. The surgeon no longer needs to manually adjust the anvil position during surgery, saving surgical time and reducing surgical errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of an existing bevel stapler;

[0012] Figure 2 A schematic diagram of the nail pit of the nail holder;

[0013] Figure 3 for Figure 2 Cross-sectional view of AA;

[0014] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0015] Figure 5 A three-dimensional diagram of an anvil;

[0016] Figure 6 Schematic diagram of the structure of the bevel stapler of the present invention;

[0017] Figure 7 A schematic diagram of the nail pit of the nail holder;

[0018] Figure 8 for Figure 7 Cross-sectional view of the middle DD;

[0019] Figure 9 for Figure 8 Enlarged view of point E in the middle;

[0020] Figure 10A three-dimensional diagram of an anvil;

[0021] Figure 11 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 12 It is a structural diagram of the guide structure;

[0023] Figure 13 for Figure 12 Schematic diagram of the structure of the central positioning shaft and the circlip tube;

[0024] Figure 14 for Figure 13 Schematic diagram of the positioning shaft and the circlip tube after combination;

[0025] Figure 15 This is the projection view of the mating surface.

[0026] Explanation of reference numerals: 1 nail support, 2 nail magazine, 3 positioning shaft, 4 retaining spring tube, 5 nail pit, 6 adjusting nut, 8-1 limiting groove, 8-2 limiting protrusion, 8-3 upper guide inclined surface, 8-4 annular protrusion, 9-1 low plane, 9-2 high plane, 9-3 matching inclined surface. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings:

[0028] like Figure 6-11 As shown: a beveled tubular stapler, the main body of which is a tubular stapler, the bottom surface of the anvil 1 and the top surface of the staple cartridge 2 of the tubular stapler cooperate with each other to form an anastomotic surface for anastomosing tissues, characterized in that: the anastomotic surface is divided into a low plane 9-1 and a high plane 9-2 perpendicular to the direction of travel of the anvil 1, and an anastomotic bevel 9-3 inclined relative to the low plane 9-1 and the high plane 9-2, the low plane 9-1 is connected to the lowest point of the anastomotic bevel 9-3, and the high plane 9-2 is connected to the highest point of the anastomotic bevel 9-3.

[0029] It should be noted that the structure and operating principle of the stapler including the stapler 1 and the stapler cartridge 2 are the same as those of the existing tubular stapler, with the main adjustment being made in the shape of the stapler surface. Figure 10 It can be seen that compared with the existing beveled anastomosis surface, the highest and lowest points of the bevel are planes rather than bevels. This design ensures the integrity of the nail pits 5 in the area around 11-1 o'clock and 5-7 o'clock on the anastomosis surface. Figure 8 、 9Experiments have shown that this complete nail pit ensures that the titanium nails on the entire anastomotic surface present a perfect "B" shape after the anastomosis is completed. After the anastomosis (suturing) is completed, the suture surface on the intestinal tube also becomes inclined. In the radial direction of the intestinal nail, each cross-section has only two scar points instead of a single scar circle, thus maintaining the original elasticity of the intestinal tube and avoiding intestinal obstruction and blockage.

[0030] The included angle between the anastomotic bevel 9-3 and the traveling direction of the anvil 1 is 50-70°, and 65° is generally preferred.

[0031] like Figure 2 、 15 As shown: the projection of the anastomotic surface is circular, and the angle α between the line connecting the two intersections of the projection of the lower plane 9-1 and the projection of the anastomotic slope 9-3 and the center of the circle is 60-90°; the angle β between the line connecting the two intersections of the projection of the upper plane 9-2 and the projection of the anastomotic slope 9-3 and the center of the circle is 60-90°. The above angle is preferably 60° (i.e. Figure 2 11 o'clock, 13 o'clock, 7 o'clock, and 5 o'clock positions).

[0032] like Figure 12-14 As shown: a guide structure for guiding the axial angle between the anvil 1 and the nail magazine 2 is provided on the retaining spring tube 4 connected to the bottom of the anvil 1 and the positioning shaft 3 in the nail magazine 2.

[0033] The guiding structure is a limiting groove 8 - 1 provided on the bottom side wall of the snap spring tube 4 and a limiting protrusion 8 - 2 provided on the side wall of the positioning shaft 3 and matched with the limiting groove 8 - 1 .

[0034] The guiding structure also includes an upper guide slope 8-3 arranged at the bottom of the retaining spring tube 4 and an annular ridge 8-4 arranged on the outer peripheral side wall of the positioning shaft 3. The upper surface slope of the annular ridge 8-4 cooperates with the upper guide slope 8-3; the limiting groove 8-1 is opened at the uppermost end of the upper guide slope 8-3, and the limiting protrusion 8-2 is located at the uppermost end of the annular ridge 8-4.

[0035] like Figure 12-14 As shown, to ensure that the bottom surface of the anvil 1 and the top surface of the staple cartridge 2 correspond to each other, a retaining groove 8-1 is provided on the bottom sidewall of the retaining spring tube 4, and a retaining protrusion 8-2 is provided on the sidewall of the positioning shaft 3 to cooperate with the retaining groove 8-1. When the retaining groove 8-1 and the retaining protrusion 8-2 are aligned, the retaining spring tube and the positioning shaft 3 are connected, ensuring that the bottom surface of the anvil 1 and the staple cartridge 2 are in contact with each other, forming the desired mating surface.

[0036] The upper guide slope 8-3 and the inclined annular protrusion 8-4 can further guide the axial direction of the nail seat 1. When the limiting groove 8-1 and the limiting protrusion 8-2 are aligned, the bottom surface of the nail seat 1 and the top surface of the nail magazine 2 are synchronously aligned.

[0037] Here's how it works:

[0038] The present invention is used in gastrointestinal surgery. First, take out the disposable tubular anastomosis device and remove the protective cover of the stapler. Place the disposable tubular anastomosis device inside the organ to be anastomosed until the anvil is completely exposed. Rotate the adjustment nut 6 at the rear of the instrument counterclockwise to increase the gap between the anvil and the stapler so that it is large enough to accommodate the two broken ends of the anastomosis site. Tighten the purse string at one end of the stapler and tie the purse string to the puncture connecting shaft with moderate force. Then tighten the purse string at one end of the positioning shaft and tie the purse string to the positioning shaft with moderate force. Rotate the tail adjustment nut clockwise to bring the tissues at both ends closer together until the indicator reaches the green area of ​​the indicator sign. Turn on the safety button and hold the movable handle tightly to trigger. When there is a crisp click and an obvious breakthrough feeling, it means that the firing has been completed. Rotate the adjustment nut counterclockwise and slowly pull out the disposable tubular anastomosis device.

[0039] Although the present invention is illustrated and described using specific embodiments and their alternatives, it should be understood that various changes and modifications can be implemented without departing from the spirit and scope of the present invention. Therefore, it should be understood that the present invention is not limited in any sense except by the limitations of the appended claims and their equivalents.

Claims

1. An inclined tubular stapler, wherein the main body is a tubular stapler, wherein the bottom surface of the stapler seat (1) and the top surface of the stapler cartridge (2) of the tubular stapler cooperate with each other to form an anastomotic surface for anastomosing tissues, and wherein: The anastomotic surface is divided into a low plane (9-1) and a high plane (9-2) perpendicular to the direction of travel of the anvil (1), and an anastomotic inclined plane (9-3) inclined relative to the low plane (9-1) and the high plane (9-2), the low plane (9-1) is connected to the lowest point of the anastomotic inclined plane (9-3), and the high plane (9-2) is connected to the highest point of the anastomotic inclined plane (9-3); A guide structure for guiding the axial angle between the anvil (1) and the nail magazine (2) is provided on the spring tube (4) connected to the bottom of the anvil (1) and on the positioning shaft (3) in the nail magazine (2); The guiding structure comprises a limiting groove (8-1) provided on the bottom side wall of the snap spring tube (4) and a limiting protrusion (8-2) provided on the side wall of the positioning shaft (3) and cooperating with the limiting groove (8-1); The guiding structure further comprises an upper guiding inclined surface (8-3) arranged at the bottom of the spring tube (4) and an annular convex edge (8-4) arranged around the outer peripheral side wall of the positioning shaft (3), wherein the upper surface slope of the annular convex edge (8-4) cooperates with the upper guiding inclined surface (8-3); the limiting groove (8-1) is opened at the uppermost end of the upper guiding inclined surface (8-3), and the limiting protrusion (8-2) is located at the uppermost end of the annular convex edge (8-4).

2. The beveled tubular anastomosis device according to claim 1, characterized in that: The included angle between the anastomotic bevel 9-3 and the travel direction of the anvil (1) is 50-70°.

3. The beveled tubular anastomosis device according to claim 1, characterized in that: The projection of the anastomotic surface is in the shape of a circular ring, and the angle α between the two intersections of the projection of the low plane (9-1) and the projection of the anastomotic inclined plane (9-3) and the line connecting the center of the circle is between 60 and 90 degrees; the angle β between the two intersections of the projection of the high plane (9-2) and the projection of the anastomotic inclined plane (9-3) and the line connecting the center of the circle is between 60 and 90 degrees.

Images