JP3615800B2 - Endoscopic treatment tool - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an endoscopic treatment tool in which a distal end distal end working member is remotely opened and closed by opening and closing a pair of proximal operating levers on which finger hooks are formed.
[0002]
There are two types of operation parts on the hand side of the endoscopic treatment tool: a method of sliding a finger in the direction of pulling an operation wire, etc., and a method of opening and closing an operation lever in the same manner as a heel. The invention relates to the latter.
[0003]
[Prior art]
Endoscopic treatment instruments that open and close the operation lever are generally configured by connecting a distal end working member on the distal end side and an operation lever on the proximal side on which a finger hook is formed with an elongated shaft. The tip actuating member is driven to open and close by opening and closing the lever, and the size of the operating lever is adjusted to the size of a normal human hand.
[0004]
[Problems to be solved by the invention]
As described above, when the size of the operating lever is formed in accordance with the size of an ordinary human hand, the size is much larger than the distal end working portion of the treatment instrument.
[0005]
Therefore, in the conventional endoscope treatment tool, the amount of operation of the finger that opens and closes the operation lever is significantly different from the amount of opening and closing of the distal end working unit that is opened and closed inside the body, and how much is the distal end working unit. The operator cannot grasp whether the door is opened or closed.
[0006]
Therefore, the operator can not feel the size and hardness of the affected area sandwiched between the tip working part, it is very difficult to judge whether it will not bleed no matter how much force is applied, and use it safely However, there is a drawback that requires considerable skill.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide an endoscopic treatment tool that can be sensed on the hand side of the size and hardness of an affected area sandwiched between distal end working parts and can be used safely and easily. To do.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the endoscopic treatment tool of the present invention is provided with a pair of operation levers that are rotatable around a fulcrum and each have a finger hook on the proximal side, and on the distal end side. In the endoscope treatment tool provided with the distal end actuation member that is remotely opened / closed by opening / closing the pair of operation levers, the opening / closing amount of the finger hook when the operation lever is opened / closed and the tip actuation The opening / closing amount of the member is substantially equal.
[0009]
The tip actuating member and the finger rest may be arranged so that the fingers engaged with the pair of finger rests are in close contact with each other when the tip actuating member is in a closed state.
[0010]
【Example】
Embodiments will be described with reference to the drawings.
FIG. 2 is a plan sectional view of the first embodiment when the present invention is applied to an endoscopic biopsy forceps, and FIG. 1 is a side view showing the same as a link mechanism. White circles indicate joints that connect the links in a rotatable manner.
[0011]
The tip actuating member is formed by a pair of forceps cups 11, 11 and is connected to a known pantograph-like link mechanism 3 disposed at the tip portion of the connecting tube 2.
[0012]
The connecting pipe 2 is formed of a metal pipe such as a stainless steel pipe, for example, and a pair of operation levers 5 and 5 that are rotatable around a shaft 4 fixed to the connecting pipe 2 are arranged on the hand side. In addition, loop-shaped finger hooks 6 and 6 for engaging the operator's fingers are formed at the ends of the operation levers 5 and 5.
[0013]
A pair of operating levers 5, 5 are provided with a link mechanism 7 similar to the tip side in the vicinity of the rotary shaft 4, and a rod 8 for connecting the two link mechanisms 3, 7 is provided in the connecting pipe 2. It is inserted loosely so that it can freely advance and retreat.
[0014]
As a result, if the fingers are engaged with the pair of finger hooks 6 and 6 and the operation levers 5 and 5 are opened and closed, the rod 8 is driven forward and backward in the connecting pipe 2 by the link mechanism 7 on the hand side. Then, the link mechanism 3 on the distal end side operates to open and close the forceps cups 11 and 11.
[0015]
In the biopsy forceps of the first embodiment thus configured, the opening / closing angle of the operation levers 5 and 5 and the opening / closing angle of the forceps cups 11 and 11 are both substantially equal to θ, and the opening and closing of the finger hooks 6 and 6 is also performed. Both the movement amount and the opening / closing movement amount of the forceps cups 11 and 11 are substantially equal to W.
[0016]
In order to perform such an operation, the link lengths of both the link mechanisms 3 and 7 on the front end side and the proximal side need only be the same, and both link mechanisms 3 and 7 do not necessarily have the same link length. The link length may be set to a relationship suitable for such an operation.
[0017]
As a result, the endoscopic biopsy forceps of this embodiment are inserted into the patient's body through a guide tube or the like inserted into the body cavity separately from the endoscope channel or the endoscope, and the operation levers 5, 5 When the forceps cups 11 and 11 are driven to open and close from the outside, the opening and closing amounts of the finger hooks 6 and 6 and the opening and closing amounts of the forceps cups 11 and 11 are substantially equal, and the tip actuating member forceps cups 11 and 11 are in the closed state. Sometimes, the pair of finger hooks 6 and 6 come closest to each other, and the fingers engaged therewith are almost in close contact with each other.
[0018]
Therefore, since the operator can easily grasp how much the forceps cups 11 and 11 are opened and closed, the operator can feel the size and hardness of the affected part sandwiched between the forceps cups 11 and 11. It is possible to easily determine whether or not bleeding will occur no matter how much force is applied.
[0019]
FIG. 3 shows a second embodiment of the present invention. In the biopsy forceps having the same structure as that of the first embodiment, the operating lengths of the forceps cups 11 and 11 and the operating lengths of the operation levers 5 and 5 are shown. Are the same length L.
[0020]
Therefore, the open / close angle of the operation levers 5 and 5 and the open / close angle of the forceps cups 11 and 11 are easily made equal, and the open / close movement amount of the finger hooks 6 and 6 is equal to the open / close movement amount of the forceps cups 11 and 11. can do.
[0021]
In addition, this invention is not limited to the said Example, As a front-end | tip operation member, for example, the grasping forceps which has the grasping pieces 12 and 12 as shown in FIG. 4 or FIG. The connecting tube 2 and the rod 8 are formed of flexible members so that they can be applied to a treatment instrument having the scissors 13 and 13 and can be used for an endoscope having a soft insertion portion. May be.
[0022]
【The invention's effect】
According to the present invention, since the movement amount of the finger hook at the time of opening / closing the operation lever and the movement amount of the tip actuating member are substantially equal, the operator can easily grasp how much the tip actuating member is opened / closed. Can do. As a result, the operator can feel the size and hardness of the affected area sandwiched between the tip actuating members, and can easily determine whether or not to bleed no matter how much force is applied, Even unskilled operators can use it easily and safely.
[0023]
If the tip actuating member and the finger hook are arranged so that the fingers engaged with the pair of finger hooks are in close contact with each other when the tip actuating member is in the closed state, how much the tip actuating member opens and closes. It is possible for the operator to more easily grasp whether or not.
[Brief description of the drawings]
FIG. 1 is a side view showing a first embodiment in terms of a link mechanism.
FIG. 2 is a plan sectional view of the first embodiment.
FIG. 3 is a side view of the second embodiment.
FIG. 4 is a perspective view of a tip portion of a third embodiment.
FIG. 5 is a perspective view of a tip portion of a fourth embodiment.
FIG. 6 is a perspective view of a tip portion of a fifth embodiment.
[Explanation of symbols]
5 Operation lever 6 Finger hook 11 Forceps cup (tip operation member)

Claims (2)

The hand side is provided with a pair of operation levers that are rotatable around a fulcrum and each formed with a finger hook. The tip side is remotely opened and closed by opening and closing the pair of operation levers. In an endoscope treatment tool provided with a tip operating member,
The length of the tip actuating member is formed to be the same as the length from the rotation center axis of the operation lever to the vicinity of the center of the finger hook, and the opening / closing angle is the same as the opening / closing angle of the operation lever when the operation lever is opened / closed. A treatment instrument for an endoscope, wherein the operation lever and the tip actuating member are connected via a link mechanism for opening and closing the tip actuating member . The distal actuating member and O over the finger but for endoscope according to claim 1, wherein each other said end effector member has engaged in over the pair of fingers when the closed state the finger is located closely adjacent relationship Treatment tool.

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