JPH10305040A - Clamper for surgical operation under endoscope observation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an object to be clamped from being broken due to clamping by forming a clamping part from a material having elasticity in opening/closing direction, and constituting the clamping part so as to be elastically deformed when clamping power is further added to the clamping part for clamping the object. SOLUTION: A pair of clampers 11a forming the clamping part are formed from elastic plastic or rubber materials into ring having long circular contour. A link section continued to the holder 11a can be formed from the same member as the holder 11a but the link section is made of metal and bond or insert molding can be performed with the holder 11a as well. The outer width of clamper 11a is made wider than the inner diameter of tracurl and sized so as to clamp an internal organ 100. Thus, since elasticity is provided, the holding part is crushed thin vertically with the opening/closing direction and passed through the tracurl and when it is passed, its original form is recovered. Even when large power is further added in holding state, the holding part is elastically deformed to absorb excessive holding power and the object 100 to be clamped can be prevented from being broken.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gripper for endoscopic surgical operation which is inserted into and removed from a cylindrical trocar and used under observation by an endoscope.

[0002]

2. Description of the Related Art In recent years, endoscopic surgery in which the gallbladder and the like are removed without opening the laparotomy by making several holes for passing a trocar for guiding an endoscope and treatment tools through the skin is widely performed. In this case, an endoscopic surgical gripper is used for gripping a gall bladder or the like.

[0003] A gripping tool used for such an endoscopic surgical operation is used by being inserted into and removed from a cylindrical trocar inserted into a body through a hole drilled in the skin. It is formed as thin and small as possible. However, a grip portion smaller than the inner diameter of the trocar is somewhat too small to grip the gall bladder or the like, so that it is difficult to hold it stably and reliably.

The inventor of the present invention has invented a grasping tool for an endoscopic surgical operation in which a grasping portion is formed large by an elastic member and elastically deformed so that the grasping portion can be inserted into a trocar. Filed a patent application (Japanese Unexamined Patent Publication
No. 140986).

[0005]

However, even in the case of such a grasping tool for endoscopic surgery, the size of the grasping piece is larger than the distance between the fulcrum of the operation handle of the operation section and the operation force point. Is extremely small, so the force applied on the operation unit side is expanded to a large force on one side of the grip by the leverage, and the gripped piece that has a tumor part or the like that tends to bleed may be broken with the grip piece Was not few.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a grasping tool for an endoscope surgical operation that can securely grasp without grasping and breaking even an object to be grasped that is fragile.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, an endoscopic surgical grasper of the present invention is inserted into and detached from a tubular trocar and used under observation by an endoscope. A gripper for endoscopic surgical operation, wherein the gripper is inserted into and removed from the trocar and opened and closed in a state of being forwardly protruded from the tip of the trocar, and a remote opening / closing operation of the gripper And a connecting portion that is detachably inserted into the trocar and connects the gripping portion and the operating portion, wherein the gripping portion further grips an object to be gripped, and further performs the operation. The grip portion is formed of a member having elasticity in the opening and closing direction such that the grip portion is elastically deformed when a closing force is applied to the grip portion from a portion side.

The thickness of the grip in the opening / closing direction may be smaller than the thickness in the direction perpendicular to the grip, and the grip may have an outer diameter dimension that cannot pass through the trocar in a normal state. The trocar may be formed so that the gripper can pass through the trocar by elastically deforming the gripper in a direction perpendicular to the opening / closing direction.

Further, the grip may be formed by a pair of grips formed in a ring, each of which is opened and closed by a remote operation from the operation unit.
The thickness of the pair of gripping pieces in the opening and closing direction may be gradually reduced in the opening and closing direction, and the thickness in the opening and closing direction at the foremost portion may be formed to be thinner than the thickness in the direction perpendicular thereto.

The grip may be formed by a pair of beak-shaped grips which are opened and closed by remote control from the operation unit.

[0011]

Embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows the trocar 1 and the gripper 10 for endoscopic surgery.

The trocar 1 is formed in a cylindrical shape from metal and is inserted into the body through a hole formed in the skin. One gripper 10 is inserted into and removed from the trocar 1,
It is used under the observation of an endoscope inserted into the body through another hole opened in the skin.

In the figure, reference numeral 11 denotes a grip portion which is inserted into and removed from the trocar 1 and is opened / closed in a state of being protruded forward from the tip of the trocar 1, and a pair of open / close grip pieces as shown in FIG. 11a, 11a. Details of the gripping pieces 11a will be described later.

The grip portion 11 is disposed so as to protrude forward from a distal end of a sheath 12 made of an elongated metal or plastic pipe which can be inserted into the trocar 1, and grip portions 11a, 11a are provided at the distal end portion of the sheath 12. A pantograph link mechanism 13 for opening and closing is provided.

On the proximal end side of the sheath 12, gripping pieces 11a,
Operation unit 15 for opening and closing 11a by remote control
Is attached, and the holding portion 11 is
And the operation unit 15 are connected.

The operating section 15 is provided with a pair of operating arms 17 and 18 which can be opened and closed about a shaft 16.
A finger hook 19 is formed at each end thereof. One operating arm 17 is fixed to the proximal end of the sheath 12, and the other operating arm 18 is connected to an end of an operating rod 21 for opening and closing the link mechanism 13. 22
Is a rubber cap for preventing sewage and the like from spouting through the inside of the sheath 12.

The operating rod 21 is disposed in the sheath 12 so as to be able to advance and retreat in the axial direction, and the link mechanism 13 is driven by the advance and retreat operation. Therefore, the operation arm 1
By operating the opening and closing of the operation rods 7 and 18, the operation rod 21 is opened.
Moves forward and backward in the sheath 12, and the link mechanism 13 at the distal end is driven, whereby the gripping pieces 11a, 11a are opened and closed.

As shown in FIG. 3, each gripping piece 11a has an elliptical annular shape and is formed of an elastic plastic or rubber material. Gripping piece 11a
May be the same member as the gripping piece 11a, but the link portion may be formed of metal and joined or insert-molded with the gripping piece 11a.

As shown in FIG. 4, the gripping piece 11a has an outer width W larger than the inner diameter D of the trocar 1, and is large enough to grip an organ such as the gallbladder. I have.

Since the gripping piece 11a is resilient, when it is inserted into and removed from the trocar 1 during use, as shown in FIG. 4, it is elastically deformed into a state in which it is squashed in a direction perpendicular to the opening and closing direction. Then, when the user passes through the trocar 1 and gets out of the trocar 1 in that state, the trocar 1 returns to its original large annular shape due to its elasticity.

As shown in FIGS. 2 and 4, the thickness h of the gripping piece 11a in the opening / closing direction is set so that the gripping piece 11a has a large elasticity in the opening / closing direction. It is formed thinner than the wall thickness e. That is, h <e, and both h and e are uniform.

As a result, since the gripping piece 11a has a large elasticity in the opening and closing direction, for example, when the object to be gripped such as the gallbladder is gripped by the pair of gripping pieces 11a, the gripping piece 11a is further closed from the operation section 15 side. When a force is applied, as shown in FIG. 1, the intermediate portion of the gripping piece 11a elastically and elastically deforms, so that the object to be gripped 100 is not damaged by the closing force of the gripping piece 11a, and is securely and safely. Can be grasped.

The gripping piece 11a is not limited to the shape described in the above embodiment, but can take various shapes. FIG.
FIG. 6 is a side view of a gripping piece 11a according to a second embodiment of the present invention, and FIG. 6 is a plan view of the gripping piece 11a. The gripping pieces 11a are formed so that they contact each other only at the distal end portion, and at the intermediate portion, there is a gap between them.
The thickness h of the gripping piece 11a in the opening and closing direction is formed gradually thinner toward the distal end, and the thickness h of the tip end in the opening and closing direction is
The whole is formed to be thinner than the uniform thickness e in the width direction.

By forming in this manner, in a state where the object to be gripped 100 is gripped as shown in FIG.
When a closing force is further applied to the gripping piece 11a from the operation unit 15 side, the intermediate portion of the gripping piece 11a is deformed by a sufficient amount as shown in FIG.

FIG. 9 is a side view of a gripping piece 11a according to a third embodiment of the present invention, and FIG. 10 is a plan view of the gripping piece 11a. A protrusion 11b is provided at a position facing the tip of the gripping piece 11a.
Is formed.

The gripping piece 11a of this embodiment is also formed to be thinner in the thickness h than in the width e (both the width e and the thickness h are uniform), and the gripping object 100 is gripped by the pair of gripping pieces 11a. Further, when a closing force is applied to the gripping piece 11a, as shown in FIG. 11, an intermediate portion of the gripping piece 11a elastically deforms.

[0027]

According to the present invention, when a gripping portion is further subjected to a closing force from the operating portion while the object to be gripped is gripped, the gripping portion is elastically deformed. Even in the case of an object, an object to be grasped can be securely and safely grasped without being pinched and broken.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a state in which a strong closing force is applied to a gripping piece according to a first embodiment of the present invention.

FIG. 2 is an overall side sectional view of the gripper for endoscopic surgical operation according to the first embodiment of the present invention.

FIG. 3 is a perspective view of a grip portion according to the first embodiment of the present invention.

FIG. 4 is a partial plan cross-sectional view for explaining the operation of the grip portion according to the first embodiment of the present invention.

FIG. 5 is a side sectional view of a gripping piece according to a second embodiment of the present invention.

FIG. 6 is a plan view of a grip portion according to the second embodiment of the present invention.

FIG. 7 is a side cross-sectional view illustrating a state where an object to be grasped is grasped by a grasping unit according to the second embodiment of the present invention.

FIG. 8 is a side cross-sectional view of a distal end portion in a state where a strong closing force is applied to a gripping piece according to the second embodiment of the present invention.

FIG. 9 is a side view of a gripping piece according to a third embodiment of the present invention.

FIG. 10 is a plan view of a grip portion according to a third embodiment of the present invention.

FIG. 11 is a side view of a distal end portion in a state where a strong closing force is applied to a gripping piece according to the third embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 trocar 10 gripper 11 gripper 11a gripper piece 12 sheath (connection part) 15 operation unit

Claims (6)

[Claims] An endoscopic surgical gripper inserted into and removed from a tubular trocar and used under observation by an endoscope, wherein the distal end of the trocar is inserted into and removed from the trocar. A gripper that is opened and closed in a state of being pulled out from the front, an operation unit for remotely opening and closing the gripper, and connecting the gripper and the operation unit so as to be removably inserted into and removed from the trocar. And a connecting portion, wherein the gripping portion is elastically deformed when a closing force is further applied to the gripping portion from the operating portion side in a state where the object to be gripped is gripped by the gripping portion, so that the gripping portion is elastically deformed. A grasping tool for an endoscopic surgical operation, which is formed of a member having elasticity in an opening and closing direction. 2. A grasping tool for endoscopic surgical operation according to claim 1, wherein the thickness of the grasping portion in the opening and closing direction is formed smaller than the thickness in the direction perpendicular to the opening and closing direction. 3. The gripping portion has an outer diameter dimension that cannot pass through the trocar in a normal state, and the gripping portion is elastically deformed in a direction perpendicular to the opening and closing direction. The gripper for endoscopic surgical operation according to claim 1 or 2, wherein the portion can pass through the trocar. 4. The lower endoscope according to claim 1, wherein the grip portion is formed by a pair of annular grip pieces each of which is opened and closed by remote control from the operation portion. Surgical gripper. 5. The opening and closing thickness of the pair of gripping pieces in the opening and closing direction is gradually reduced toward the distal end, and the thickness in the opening and closing direction at the foremost portion is formed to be smaller than the thickness in the vertical direction. The gripper for endoscopic surgical operation according to claim 1. 6. The endoscopic surgery according to claim 1, wherein the grip portion is formed by a pair of beak-shaped grip pieces each of which is opened and closed by a remote operation from the operation portion. Surgical gripper.