CN209847270U - Medical binder - Google Patents

Abstract

The embodiment of the utility model discloses medical binding device, in order to reduce required strength and alleviate doctor's burden in the tissue cutting operation, the utility model discloses a medical binding device (1) has: a staple housing (2) provided with a holding surface (2a) for pushing out a staple (5) for stapling tissue and a cutter (7) for cutting the tissue, the cutter (7) being caused to protrude from the holding surface (2 a); an anvil (4) configured to hold the tissue between the holding surface (2a) and the anvil (4), the anvil (4) being arranged facing the staples (5) in an ejection direction thereof; the receiving member (12) having a receiving surface (14) for receiving the edge (7a) of the cutter (7), the receiving member (12) being provided on the anvil (4); the receiving surface (14) of the receiving member (12) is in contact with the edge (7a) of the cutter (7) only partly at a time during the cutting process over the entire cut length of tissue.

Description

Medical binder

Technical Field

The embodiment of the utility model provides a relate to medical instrument technical field, concretely relates to medical binding ware.

Background

Medical staplers are known in the art as treatment tools for simultaneously stapling and cutting tissue.

A medical stapler includes a plurality of staples, a mechanism for ejecting the staples, an anvil for deforming the ejected staples, and a cutter for cutting tissue stapled by the staples in a pair of jaws to cut the tissue.

However, although the medical staplers of the prior art attempt to reduce the required strength of the applied force by independently performing the stapling and cutting of the tissue, it is necessary to cut the tissue at one time along the entire length in the tissue cutting operation. Problematically, the force required to do so is very high, which places a burden on the physician.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is an object of the present invention to provide a medical stapler capable of reducing a burden on a doctor by reducing a force required for cutting a tissue. In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:

a medical stapler includes a clamping surface for ejecting staples for stapling tissue, and a cutter projecting from the clamping surface to cut the tissue, and an anvil disposed opposite an ejection direction of the staples and configured to hold the tissue between the holding surface and a receiving member disposed on the anvil and having a receiving surface for receiving a cutting edge of the cutter, wherein the cutting edge of the cutter contacts only a portion of a full length of a cut length of the tissue during cutting.

Preferably, the receiving surface comprises a first contact surface which simultaneously contacts in a direction along the cutting edge of the cutter, and a hole which opens in the first contact surface.

Preferably, a plurality of said apertures are spaced apart in the direction of the cutting edge of said cutter.

Preferably, the apparatus further comprises a second contact surface portion enclosing at least a portion of the aperture and disposed in a recess of the first contact surface portion.

Preferably, a distance between the first contact surface portion and the second contact surface portion is set to be equal to or larger than a deformation amount required to break the first contact surface portion by the cutter.

Preferably, the receiving surface is inclined relative to the cutting edge of the cutter.

The embodiment of the utility model provides a have following advantage:

according to the utility model discloses, can reduce the required strength of cutting tissue operation and alleviate doctor's burden.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a longitudinal sectional view showing a medical stapler according to an embodiment of the present invention.

Fig. 2 is a perspective view partially showing a cutter and a receiving member provided in the medical stapler of fig. 1.

FIG. 3 is a longitudinal cross-sectional view of the receiving member of FIG. 2;

fig. 4 is a longitudinal sectional view illustrating an embodiment of the receiving member of fig. 1.

FIG. 5 is a cross-sectional view of the receiving member of FIG. 4;

fig. 6 is a cross-sectional view showing a state where the top plate portion of the receiving member of fig. 4 is pressed by the cutting edge of the tool.

Fig. 7 is a longitudinal sectional view showing another embodiment of the receiving member of fig. 1.

FIG. 8 is a cross-sectional view of the receiving member of FIG. 7;

fig. 9 is a longitudinal sectional view showing another embodiment of the receiving member of fig. 1.

Fig. 10 is a longitudinal sectional view showing another embodiment of the receiving member of fig. 1.

Fig. 11 is a longitudinal sectional view showing another embodiment of the receiving member of fig. 1.

In the figure:

1 medical binder

2 staple shell

2a staple surface (holding surface)

2b center hole

3 center shaft

4 anvil block

4a center pole

5 staple

6 staple box

7 cutter

7a cutting edge

8 pusher

9 drive member

10 anvil bag

11 anvil part

12 receiving member

13 support part

14 roof part

14a surface (first contact surface portion)

15 holes (hole part)

16 middle plate part (second contact surface part)

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The medical stapler 1 according to the present embodiment is a circular staple medical stapler, and as shown in fig. 1, a cylindrical staple casing 2 having an annular tip end surface (gripping surface) 2a, a center shaft 3 is axially disposed through the same center axis as a center hole 2b of the staple casing 2, and an anvil 4 is provided with a center rod 4a, the center rod 4a being detachably mounted on a tip end of the center shaft 3. The anvil 4 is disposed on the anvil 4 in a closed condition, accessible to the distal surface 2a of the staple housing 2, by engaging the central rod 4a of the anvil 4 with the central shaft 3 and pulling the central shaft 3 proximally.

For example, in the staple housing 2, a ring-shaped staple cartridge 6 accommodates a large number of staples 5 arranged in two rows circumferentially along the entire circumference and is arranged radially inside the staple cartridge 6 over the entire circumference. The ring cutter 7 and the pusher 8 support the cutter 7 while pushing out the staple 5 accommodated in the staple cartridge 6 and the driving member 9 for pushing the pusher 8 from the end face 2a toward the anvil 4 at a time.

The anvil 4 has an annular anvil portion 11, and the anvil portion 11 is provided with a plurality of anvil pockets 10, the anvil pockets 10 being provided at positions opposite to the discharge direction (axial direction) of each staple 5 of the staple housing 2 and in the radial direction of the anvil portion 11. Inside thereof, the receiving member 12 is provided at a position axially opposite to the cutting edge 7a of the cutter 7 in the staple casing 2.

In the medical stapler 1 according to the present embodiment, as shown in fig. 2, the receiving member 12 includes two cylindrical support portions 13 concentrically arranged at an interval in the radial direction; it has a substantially U-shaped cross-sectional shape including a top plate portion (receiving surface) 14 radially connecting one end of the support portion 13 in the axial direction, and as shown in fig. 2 and 3, it has a shape of a plurality of holes (hole portions) 15 penetrating the portion 14 in the plate thickness direction. The two support portions 13 are provided with a gap into which the cutter 7 can be inserted.

As shown in fig. 2, the cutter 7 provided in the staple casing 2 is projected from the distal end surface 2a by the pusher 8 so that the cutting edge 7a of the cutter 7 is a top plate, as shown in fig. 2. When abutting against the surface (first contact surface portion) 14a of the portion 14, a plurality of circumferentially spaced elements are arranged at radial positions corresponding to the cutting edges 7a of the cutters 7.

The operation of the medical binder 1 according to the present embodiment configured as described above will be described below.

To staple and cut tissue using the medical stapler 1 according to the present embodiment, first, the anvil 4 is inserted into one tubular tissue to be stapled, and the tubular tissue is inserted into the center rod 4a of the anvil 4. Allowing it to wrap around. Further, the staple housing 2 is inserted into another tubular tissue to be stapled and the tubular tissue is wound toward the central axis 3 of the staple housing 2. Thus, one tubular tissue is provided to cover the anvil portion 11 and the receiving member 12 of the anvil 4, and the other tubular tissue is provided to cover the distal end surface 2a of the staple housing 2.

In this state, the center rod 4a of the anvil 4 is attached to the center shaft 3 of the staple casing 2, and the anvil 4 is brought close to the staple casing 2 by pulling the center shaft 3 toward the base end side. This sandwiches the tissue between the staple housing 2 and the anvil 4.

Then, by pushing the driving member 9 to the tip end side, the pusher 8 is moved to the tip end side, and a large number of staples 5 contained in the staple cartridge 6 are ejected at a time by the pusher 8.

The staples 5 passing through the tissue are bent and deformed by the anvil pockets 10 provided on the anvil 4 so that the needlepoints of the staples 5 can be folded back to suture the tissue.

Further, the cutter 7 fixed to the pusher 8 is also moved to the distal side by the movement of the pusher 8, and when the staples 5 pass through the tissue, the receiving member provided on the cutting edge 7a of the cutter 7 and the anvil 4 tissue are held between the table 12 and the top plate 14, and the cutter 7 is advanced to a position where the top plate 14 will be destroyed upon completion of the tissue stapling with the staples 5. As a result, the cutter 7 is cut into a circular shape at the radially inner side of the sutured portion by the staples 5. By this operation, suturing and severing of the tubular tissue are performed simultaneously.

In this case, although the cutter 7 cuts the tissue at a time along the entire circumference, the hole 15 provided in the top plate portion 14 of the receiving member 12 makes it easy for the tissue between the cutter 7 and the top plate portion 14 to be cut. The clamping length is shorter than the entire circumferential length of the cutting edge 7a of the cutter 7.

That is, only a portion of the cutting edge 7a of the cutter 7 contacts the top plate portion 14 of the receiving member 12 when the cutter is projected in the direction of the anvil 4 by the pusher 8 in each cutting process.

Comparing it with the conventional case (the blade 7a of the cutter 7 is the same as the entire circumference of the receiving member 12) in which the top plate portion 14 of the receiving member 12 does not have the hole 15, the receiving member 12 received by the cutter 7 can reduce the amount of force for cutting the tissue due to the reduction of the reaction force. As a result, the burden on the doctor when cutting the tissue can be reduced.

Incidentally, it is possible to cut the tissue more reliably by making the cutting edge of the cutter sharp and making the distance between the support portions of the receiving member as narrow as possible, but in a circular type stapler, the sharp cutting edge is connected to the annular cutter. It is difficult to improve the sharpness of the cutting edge. Further, in consideration of circumferential deformation of the ring cutter, assembly accuracy with the anvil portion, and the like, the gap between the support portions for releasing the cutter is limited to be narrowed.

On the other hand, according to the medical stapler 1 of the present embodiment, it is possible to cut the tissue more reliably while reducing the cutting force by the simple structure in which only the hole 15 is provided in the top plate portion 14.

The force reducing effect is enhanced if the total circumference of the holes 15 is increased relative to the circumference of the top plate portion 14, but the longer the length of each hole 15, the more tissue becomes to easily escape into the hole 15, and it becomes difficult to cut the tissue. Therefore, in order to reliably cut tissue while reducing the cutting force, it is preferable to arrange a large number of holes 15 having a short circumferential length at intervals in the circumferential direction. In the present embodiment, for example, half the length of the entire circumferential length is allocated to the length of the hole 15, and the hole 15 is provided in a range shorter than 30 ° with respect to the central axis.

Further, in the present embodiment, as shown in fig. 4 and 5, the hole 15 provided in the top plate 14 is provided at a position partially closing the hole 15 at a position lower by one step than the surface 14a of the top plate 14. An intermediate plate portion (second contact surface portion) 16 may be provided.

By doing so, when tissue other than the portion cut by being sandwiched between the top plate portion 14 and the cutting edge 7a of the cutter 7 escapes into the hole 15 provided in the top plate portion 14, the tissue that has escaped into the hole 15 can also be cut more reliably by being sandwiched between the intermediate plate portion 16 provided at the lower position and the cutting edge 7a of the cutter 7.

In this case, the step size between the top plate portion 14 and the intermediate plate portion 16 is large, so that the tip 7a of the tool 7 reaches the intermediate plate portion 16 after the top plate portion 14 is broken by the tip 7a of the tool 7. The receiving member 12 is made of ABS resin or PE resin, and when a load is applied by the cutter 7, as shown in fig. 6, slight deflection occurs before fracture.

By providing a height difference so that the cutting edge 7a of the cutter 7 reaches the intermediate plate portion 16 after the top plate portion 14 is broken, the intermediate plate portion 16 presses the top plate portion 14 with the cutting edge 7a of the cutter 7. That is, by avoiding a state in which the cutting edge 7a of the cutter 7 presses the top plate portion 14 and the intermediate plate portion 16 simultaneously in each cutting process, the cutting of the tissue cannot be performed simultaneously over the entire circumference. There is an advantage in that the amount of cutting force can be more reliably reduced.

The intermediate plate portion 16 may be integrally formed between the two support portions 13 as shown in fig. 4 to 6, or two as shown in fig. 7 and 8. It may receive the member 17 by combining separate configurations.

Further, the intermediate plate portion 16 is not limited to be disposed at a position one step lower than the top plate portion 14, and as shown in fig. 9, two or more intermediate plate portions 16 having different step sizes may be disposed.

By doing so, the bite site where the tissue is sandwiched between the cutting edge 7a of the cutter 7 and the top plate portion 14 or the middle plate portion 16 can be spread out, and the cutting force can be further reduced.

Further, by providing the hole 15 in the top plate portion 14 instead of having the nose 7a of the cutter 7 not simultaneously contact the top plate portion 14, as shown in fig. 10 and 11, by inclining the top plate portion 14 with respect to the cutting edge 7a, the top plate portion 14 and the cutting edge 7a of the cutter 7 do not simultaneously contact each time during the cutting process.

By so doing, since the cutting of the tissue is sequentially performed between the cutting edge 7a of the cutter 7 and the inclined top plate portion 14, the cutting edge 7a of the cutter 7 and the top plate portion 14 are parallel. The cutting force applied at one time can be significantly reduced.

Further, with the configuration shown in fig. 11, the load from the cutting edge 7a of the cutter 7 acts uniformly on the entire receiving member 12, thereby preventing the tissue from slipping off along the slope. It has the advantage of being able to cut without tension.

Further, in the present embodiment, the circular medical stapler 1 has been described as an example, but it may be applied to a linear medical stapler.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (6)

1. A medical stapler comprising a clamping surface for ejecting staples for stapling tissue and a cutter projecting from the clamping surface for cutting the tissue, and an anvil arranged opposite the ejection direction of the staples and configured to hold the tissue between a holding surface and a receiving member arranged on the anvil and having a receiving surface for receiving a cutting edge of the cutter, wherein the cutting edge of the cutter contacts only a portion of the entire length of the cut length of the tissue during cutting.

2. The medical binder of claim 1 wherein the receiving surface includes a first contact surface that simultaneously contacts in a direction along the cutting edge of the cutter and a hole that opens in the first contact surface.

3. The medical binder of claim 2 wherein a plurality of said apertures are spaced apart in the direction of the cutting edge of said cutter.

4. The medical binder of claim 2 or 3 further comprising a second contact surface portion closing at least a portion of the aperture and disposed in a recess of the first contact surface portion.

5. The medical stapler of claim 4, wherein a distance between the first contact surface portion and the second contact surface portion is set to be equal to or greater than an amount of deformation required to break the first contact surface portion by the cutter.

6. The medical binder of claim 1 wherein the receiving surface is inclined relative to the cutting edge of the cutter.