CN201542673U - Round tube stapler for minimally invasive surgery - Google Patents

Abstract

The utility model provides a circular tube-type binding instrument for minimally invasive surgery, which comprises a nail bin, a nail barrel and a hollow connecting tube fixedly connected to each other, a nail pushing piece is arranged inside the nail barrel, and a nail anvil pull rod is placed on the It moves in the center hole tube on the nail barrel, and the circular tube type binding instrument also includes a sealing gasket, which is arranged inside the nail barrel and is sleeved on the center hole tube. The pad includes a disc body for closing the space between the nail barrel and the nail pushing piece and an annular body for closing the space between the nail anvil pull rod and the central hole tube. The beneficial effects of the utility model are mainly reflected in that the circular tube binding instrument has good sealing performance, is well suitable for minimally invasive surgery, and has a simple structure and convenient installation.

Description

Round tube stapler for minimally invasive surgery

technical field

The utility model relates to a circular tube-type binding instrument for surgery with good airtightness, which can be used for minimally invasive surgery and belongs to the field of medical instruments.

Background technique

The circular tube binding instrument for surgery is a medical device that is often used when suturing and cutting physiological tissues such as esophagus and intestinal tract. Its performance directly affects the operation process and plays a very important role in the operation effect. In the prior art, as disclosed in U.S. Patent No. 5,205,459, the circular tube-type binding instrument is generally composed of a body with a firing handle and a binding head with a sewing device. Composed of hollow connecting pipes. The inside of the nail barrel is movably provided with a nail pushing piece, and a nail anvil pull rod moves in the central hole tube provided on the nail barrel for connecting with the nail anvil assembly.

The current round tube binding instruments are generally used in open surgery, that is, it is necessary to open the chest or abdomen in a wide range, which is very unfavorable for the postoperative recovery of patients, so a novel surgical method, namely minimally invasive surgery, is produced. Operation. Taking the minimally invasive surgery of intestinal tissue suturing and cutting as an example, it is first necessary to use a special trocar to make a small hole in the abdomen; then use an insufflation machine to inflate the abdominal cavity to form a space for laparoscopic observation and suturing; Then exit the pneumoperitoneum machine, insert a circular tube binding instrument, laparoscope and other necessary surgical instruments into the small hole, and then perform the minimally invasive intestinal suture cutting operation.

Since minimally invasive surgery only opens a few small holes in the patient's body, it has a very positive effect on the patient's recovery. But the current circular tube type binding instrument is not very suitable for minimally invasive surgery. As shown in Figure 1, since the nail pusher 6 can move relative to the nail barrel 1, and the nail anvil pull rod 5 can move relative to the center hole tube 4, there is a large gap between them, and the gas can pass through this The gap enters the hollow interior of the connecting tube 3, and finally escapes out of the body of the patient through the body of the binding instrument. Because when the gas escapes, the tissues in the body return to the state of mutual adhesion, which causes great inconvenience for minimally invasive surgery. The existing method is to open another small hole on the patient's body and continuously inflate the patient's body during the operation. Such an approach consumes money and energy, and is not a long-term solution to the problem. Therefore, providing a round tube type binding instrument with better sealing performance has become an urgent technical problem to be solved.

Utility model content

The purpose of the utility model is to solve the above-mentioned technical problems, and to provide a round tube type binding instrument for surgery with good sealing performance.

The purpose of this utility model is achieved through the following technical solutions:

A circular tube-type binding instrument for minimally invasive surgery, comprising a nail bin fixedly connected to each other, a nail barrel and a hollow connecting tube, the inside of the nail barrel is movably provided with a nail pusher, and an anvil pull rod is located on the The center hole tube on the nail barrel moves inside, and the circular tube type binding instrument also includes a sealing gasket, which is arranged inside the nail barrel and is sleeved on the center hole tube, and the sealing gasket includes A disc body used to close the space between the nail barrel and the nail push piece and a ring body used to close the space between the nail anvil pull rod and the central hole tube.

Further, the bottom surface of the disc body is in close contact with the surface of the reinforcing rib inside the nail barrel. The disc body is provided with a set of holes for the pusher piece to pass through, and a transition fit is formed between the hole and the pusher piece. An annular body extends upward from the top surface of the disc body, and the outer diameter of the annular body is smaller than that of the disc body. The inner diameters of the disc body and the ring body are equal, and the inner surfaces of the two are in interference fit with the central hole tube.

Still further, the end of the annular body away from the disc body has an annular convex edge extending toward the center of the annular body, and the convex edge is in transition fit with the nail anvil pull rod. The inner ring surface of the convex edge is arc-shaped, and the convex edge is in point contact with the nail anvil pull rod. The inner surface of the flange is in close contact with the end surface of the central hole tube. Alternatively, the inner ring surface of the convex edge is zigzag.

Furthermore, the gasket is a rubber part.

The beneficial effects of the utility model are mainly reflected in that the circular tube binding instrument has good sealing performance, is well suitable for minimally invasive surgery, and has a simple structure and convenient installation.

Description of drawings

Below in conjunction with accompanying drawing, technical scheme of the utility model is further described:

Figure 1: A schematic diagram of the binding head of a circular tube type binding instrument in the prior art, where the escape direction of the gas is indicated.

Fig. 2: A schematic diagram of the binding head of the circular tube type binding instrument of the present invention.

Fig. 3: Front view of the gasket of the present utility model.

Figure 4: A cross-sectional view along the direction A-A in Figure 3.

Figure 5: Schematic representation of a second embodiment of a chime.

in:

1 Nail barrel 2 Nail cartridge 3 Connecting tube

4 Center hole tube 5 Anvil rod 6 Nail push piece

7 Connecting piece 8 Round hole 9 Gasket

10 Rib surface 91 Disc body 92 Bottom surface

93 top surface 94 hole 95 torus

96 inner wall 97 convex edge 98 inner surface

Detailed ways

As shown in FIG. 1 , the existing circular tube binding instrument includes a nail magazine 2 , a nail barrel 1 and a hollow connecting tube 3 which are fixedly connected to each other in sequence. The nail barrel 1 includes a circular hole 8 for accommodating the resected tissue, and a central hole communicating with the circular hole 8. form. The inside of the nail barrel 1 is movably provided with a nail pushing piece 6 , and a nail anvil pull rod 5 moves in the center hole tube 4 . Because the sealing performance of the existing circular tube type binding instrument is not good, after the gas enters from the circular hole 8, it can flow along the direction of the arrow in Fig. The gap between the central hole pipe 4 enters the hollow interior of the connecting pipe 3, and since the gap between the connecting piece 7 movably arranged in the connecting pipe 3 and the connecting pipe 3 is also very large, the gas then enters into the connecting pipe 3 through the connecting pipe 3. The body (not shown) of the round tube type binding instrument escapes into the atmosphere.

In view of this, the utility model discloses a round tube type binding instrument with better sealing performance. As shown in Figure 2, the round tube type binding instrument also includes a sealing gasket 9, and the sealing gasket 9 is arranged on the nail barrel 1, and is sleeved on the central hole tube 4, one side of which is close to the reinforcing rib surface 10 of the nail barrel. The gasket 9 is a plastic product, preferably a rubber part.

As shown in FIG. 3 and FIG. 4 , the gasket 9 is composed of a disc body 91 and a ring body 95 . The disc body 91 includes a bottom surface 92 and a top surface 93, and the bottom surface 92 is close to the rib surface 10 inside the nail barrel. The disc body 91 is provided with a set of holes 94 for the pusher piece to pass through, and the transition fit between the holes 94 and the pusher piece 6 is provided. The reason for such setting is to reach a balance point, that is, to ensure that the movement of the nail pusher 6 is not restricted, and to achieve a good seal between the nail pusher 6 and the nail barrel 1 .

An annular body 95 extends upward from the top surface 93 of the disc body 91 , and the outer diameter of the annular body 95 is smaller than the outer diameter of the disc body 91 . The inner diameters of the disc body 91 and the ring body 95 are equal, and the inner surfaces 96 of the two are in interference fit with the central hole tube 4 to ensure that the sealing gasket 9 is tightly connected with the central hole tube 4 .

The end of the annular body 95 away from the disc body extends toward the center of the annular ring with an annular flange 97 , and the inner surface 98 of the flange is closely attached to the end surface of the central hole tube 4 . The convex edge 97 is transitionally matched with the anvil pull rod 5. The reason for such setting is to ensure that the movement of the anvil pull rod 5 is not restricted, and to achieve a good seal between the anvil pull rod 5 and the central hole tube 4. . Further, the inner ring surface of the convex edge 97 is arc-shaped, so that the convex edge 97 is close to point contact with the nail anvil pull rod 5, so that the above-mentioned purpose can be achieved to the extreme. Or as shown in Figure 5, the inner ring surface of the flange 97 is in a zigzag shape, and its sawtooth top will be pressed against the anvil pull rod 5 in a transitional fit with the anvil pull rod 5 to achieve sealing and little friction. Effect.

The utility model still has a variety of sealing methods, and all technical solutions formed by equivalent replacement or equivalent transformation all fall within the protection scope of the utility model.

Claims (10)

1. tubular type binding instrument that is used for Minimally Invasive Surgery, comprise the nail bin that is mutually permanently connected, nail tube and hollow connection tube, described nail tube inside is provided with pushing slice of nail movably, have in the centre bore pipe of an anvil pull rod on being located at described nail tube and move, it is characterized in that: described tubular type binding instrument also comprises a sealing gasket, it is inner that described sealing gasket is arranged at the nail tube, and be socketed on the described centre bore pipe, described sealing gasket comprises the disc and the torus that is used to seal the space between anvil pull rod and the centre bore pipe that are used to seal the space between nail tube and the pushing slice of nail.

2. the tubular type binding instrument that is used for Minimally Invasive Surgery according to claim 1 is characterized in that: the bottom surface of described disc is closely attached on the inner reinforcement surface of described nail tube.

3. the tubular type binding instrument that is used for Minimally Invasive Surgery according to claim 2 is characterized in that: described disc is provided with one group and is used for the hole that described pushing slice of nail passes through, and is interference fits between described hole and the pushing slice of nail.

4. the tubular type binding instrument that is used for Minimally Invasive Surgery according to claim 3 is characterized in that: the end face of described disc has extended upward a torus, and described toric external diameter is less than the external diameter of disc.

5. the tubular type binding instrument that is used for Minimally Invasive Surgery according to claim 4 is characterized in that: described disc and toric internal diameter equate, both inner surfacies and described centre bore pipe interference fit.

6. the tubular type binding instrument that is used for Minimally Invasive Surgery according to claim 5 is characterized in that: a described toric end away from disc is extended with an annular chimb to circle ring center, described chimb and anvil pull rod interference fits.

7. the tubular type binding instrument that is used for Minimally Invasive Surgery according to claim 6 is characterized in that: the inner ring surface of described chimb is an arc, and described chimb is that point contacts with anvil pull rod.

8. the tubular type binding instrument that is used for Minimally Invasive Surgery according to claim 7, it is characterized in that: the inner surface of described chimb is close to the end face of described centre bore pipe.

9. the tubular type binding instrument that is used for Minimally Invasive Surgery according to claim 6 is characterized in that: the inner ring surface indention of described chimb.

10. the tubular type binding instrument that is used for Minimally Invasive Surgery according to claim 1 is characterized in that: described sealing gasket is a rubber parts.

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