JPH11164835A - Biopsy for ceps - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the closing speed of a pair of forceps at the point a little before complete closing. SOLUTION: An operating part 4 comprises a shaft-form member 8, a slider 12 connected with the shaft-form member 8 slidably, a link mechanism 13 connecting this slider 12 and a connecting wire 6, etc. A long groove 16 is provided in the shaft-from member 8. A wire 604 and a connecting piece 14 are inserted in the long groove 16. The link mechanism 13 consists of the first link 26 spanning between the slider 12 and the shaft-form member 8 and the second link 28 spanning between the first link 26 and the connecting piece 14. The displacement of the wire 604 per unit stroke of the slider 12 moved by a shift of the slider 12 is set so as to become smaller immediately before the complete closing of the forceps.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to biopsy forceps.

[0002]

2. Description of the Related Art FIG. 9 shows a front view of a conventional biopsy forceps.
As shown in FIG. 9, the biopsy forceps 102 is
, A pair of forceps pieces 106, and a connecting wire 108 for connecting the operation section 104 and the pair of forceps pieces 106, and the operation section 104 is a shaft-like member 110 extending a predetermined length.
A finger hook 112 fixed to one end of the shaft-shaped member 110 in the longitudinal direction; and a slider 114 slidably connected to the shaft-shaped member 110 and connected to the connection wire 108. Then, the pair of forceps pieces 106 and the connecting wires 108 are inserted into the flexible tube of the endoscope from the forceps port, the thumb is hung on the finger hook 112, and the index finger and the middle finger are hung on the slider 114, so that the shaft-shaped member 110 is Along the slider 114, the pair of forceps pieces 106 are opened and closed via the connecting wire 108 to take measures such as grasping and cutting tissue. In the case of hot biopsy forceps, a bleeding site is grasped and high-frequency current , The tissue in the vicinity of the bleeding part is cauterized to stop the bleeding or to remove it. In such a conventional biopsy forceps 102, the connecting wire 108 is moved by a movement amount of approximately 1: 1 with respect to the movement amount of the slider 114, and the pair of forceps pieces 106 are opened and closed. If the user wants to close slowly from the state before it is completely closed, the operation requires caution.

[0003]

For example, as shown in FIG. 10A, when a thin blood vessel 122 jumps out of a stump after a polyp 120 is cut off and bleeds from the portion, a hot biopsy forceps is used. The blood vessel is pinched, cauterized, coagulated, and stopped by a pair of forceps pieces 106, but if the pair of forceps pieces 106 can be slowly closed from a state immediately before the forceps piece 106 is completely closed, the stem of the polyp 120 is The blood vessel 122 without interposing the portion 124
Is easy to pinch. In addition, depending on the state of the stump, FIG.
As shown in FIG. 5, one of the pair of forceps pieces 106 tends to be caught on the stem 124, and the other one tends to close past the blood vessel 122 as shown by arrow A. If the pair of forceps pieces 106 can be slowly closed from a state before being completely closed,
It is easy to pinch the blood vessel 122. The present invention has been devised in view of the above circumstances, and an object of the present invention is to allow a pair of forceps pieces to be slowly closed from a state immediately before the pair is completely closed, and to perform various measures using biopsy forceps. It is to provide a biopsy forceps that can be easily performed.

[0004]

In order to achieve the above object, the present invention comprises an operating section, a pair of forceps pieces, and a connecting wire connecting the operating section and the pair of forceps pieces, wherein the operating section has
A shaft-shaped member extending a predetermined length, and a slider slidably coupled to the shaft-shaped member and connected to the connection wire, wherein the connection wire is moved by moving the slider along the shaft-shaped member. In a biopsy forceps that moves to open and close a pair of forceps pieces, the slider and the connection wire are connected via a connection mechanism, and the connection mechanism moves the wire per unit stroke of the slider moved by the movement of the slider. A first range in which the slider moves to open and close between a fully closed state in which the pair of forceps pieces are fully closed, and a slightly open state from the fully closed state, and the first range. And the second range of the slider adjacent to
It is characterized in that the first range is set smaller than the second range. Further, the present invention includes an operating section, a pair of forceps pieces, and a connection wire connecting the operating section and the pair of forceps pieces, wherein the operating section includes a shaft-shaped member extending a predetermined length, A biopsy forceps comprising a slider slidably coupled to a shaft-like member and connected to the connection wire, and moving the connection wire by moving the slider along the shaft-like member to open and close a pair of forceps pieces. The slider and the connection wire are connected via a connection mechanism, and when the stroke of the slider for bringing the pair of forceps pieces from the fully opened state to the fully closed state is a full stroke, approximately one full stroke before the fully closed state. In a stroke of ４, the amount of movement of the wire per unit stroke of the slider moved by the movement of the slider is approximately １ ／ of this.
Is set to be smaller than the movement amount of the wire for the stroke adjacent to the first stroke.
Further, the present invention includes an operating section, a pair of forceps pieces, and a connection wire connecting the operating section and the pair of forceps pieces, wherein the operating section includes a shaft-shaped member extending a predetermined length, A biopsy forceps comprising a slider slidably coupled to a shaft-like member and connected to the connection wire, and moving the connection wire by moving the slider along the shaft-like member to open and close a pair of forceps pieces. The slider and the connection wire are connected via a connection mechanism, and an intermediate state between the fully opened state and the fully closed state of the pair of forceps pieces is set as an intermediate state, and a range between the intermediate state and the fully closed state is a first range. When the second range is between the intermediate state and the fully opened state, the connecting mechanism may move the wire per unit stroke of the slider moved by the movement of the slider in the first range.
In the second range, the movement amount of the wire per unit stroke of the slider moved by the movement of the slider is set to be smaller than the movement amount of the wire. Further, the present invention includes an operating section, a pair of forceps pieces, and a connection wire connecting the operating section and the pair of forceps pieces, wherein the operating section includes a shaft-shaped member extending a predetermined length, A biopsy forceps comprising a slider slidably coupled to a shaft-like member and connected to the connection wire, and moving the connection wire by moving the slider along the shaft-like member to open and close a pair of forceps pieces. The slider and the connection wire are connected via a connection mechanism, and the connection mechanism is configured such that the average movement amount of the wire per unit stroke of the slider obtained by dividing the total movement amount of the wire by the total movement amount of the slider is equal to the pair. A first range in which the slider moves so as to open and close between a fully closed state in which the forceps piece is fully closed and a state in which the forceps piece is slightly opened from the fully closed state; Fully opened In the rest of the range in which the slider to open and close is moved between the state, the direction of the first range, characterized in that it is smaller than the second range.

Further, according to the present invention, in the shaft-like member, a long groove extending in a direction in which the shaft-like member extends is formed, and an end of the connection wire is inserted into the long groove, and the connection is formed. The mechanism is inserted into the long groove and connects the slider to the end of the wire. Further, the present invention is characterized in that a connecting tool is attached to an end of the connecting wire, and the connecting mechanism connects the connecting tool and the slider. Further, the present invention is characterized in that the connection mechanism is constituted by a link mechanism including a plurality of links.
Further, the present invention is characterized in that the link mechanism is constituted by a first link bridged over a slider and a shaft-like member, and a second link bridged over the first link and the connector. I do. Further, in the present invention, the connection wire includes a sheath tube and a wire inserted into the sheath tube,
The end of the sheath tube is attached to a shaft-like member, and the end of the wire is attached to the connecting member. Further, the present invention is characterized in that the connection wire is moved in the same direction as the movement direction of the slider by the movement of the slider. In addition, the present invention includes an operation unit, a pair of forceps pieces, and a connection wire connecting the operation unit and the pair of forceps pieces, wherein the operation unit includes a shaft-shaped member extending a predetermined length,
A biopsy forceps comprising a slider slidably coupled to the shaft-shaped member and connected to the connection wire, and opening and closing a pair of forceps pieces via the connection wire by movement of the slider along the shaft-shaped member. Further, the pair of forceps pieces are configured to be slowly opened and closed in the vicinity where the pair of forceps pieces are fully closed.

In the present invention, since the forceps pieces are slowly opened and closed in the vicinity where the pair of forceps pieces are in the fully closed state, the operation can be more easily performed, for example, when grasping a thin blood vessel.

[0007]

Next, an embodiment of the present invention will be described. 1A and 1B are cross-sectional views of the operating portion of the biopsy forceps, FIG. 2 is a cross-sectional view of the operating portion with the forceps piece fully closed, and FIG. 3 is an open / closed state of the forceps piece. FIG. 4 is a cross-sectional view of the operation unit when the forceps piece is fully opened, FIG. 5 is a cross-sectional view of the line CC in FIG. 1A, and FIG. 6 is a cross-sectional view of the line DD in FIG. FIG. 7 and FIG. 7 are cross-sectional views in which the cross-sections of the EE line and the FF line in FIG. 1A are combined. FIG. The biopsy forceps 2 includes an operation unit 4, a pair of forceps pieces 106 (see FIG. 9), and a connection wire 6 that connects the operation unit 4 and the pair of forceps pieces 106. Operation unit 4
A shaft-shaped member 8 extending a predetermined length, a ring-shaped finger hook 10 fixed to a longitudinal base end of the shaft-shaped member 8, and a slidable member on the shaft-shaped member 8. A slider 12 is provided, and a link mechanism 13 for connecting the slider 12 to the connection wire 6 is provided. In this embodiment, the link mechanism 13 constitutes a connecting mechanism.
The connection wire 6 includes a sheath tube 602 and a wire 604 inserted therein. The end of the sheath tube 602 is fixed to the longitudinal end of the shaft-shaped member 8,
The end of 04 is inserted into the inside of the shaft-shaped member 8, and the connecting tool 14 is attached to the tip.

The shaft-shaped member 8 has a long groove 16 penetrating in the radial direction of the shaft-shaped member 8 and extending in the longitudinal direction of the shaft-shaped member 8. The wire 604 and the connector 1
4 is inserted into the long groove 16, and the connecting member 14 is inserted into the long groove 16.
, And is movably disposed in the long groove 16. As shown in FIG. 2, the end of the wire 604 and the connecting member 14 are attached to the male screw 180 of the male screw member 18.
2 into the female screw 1402 of the connector 14
This is done by tightening the end of the wire 604 inserted into the wire 4. 2 and FIG.
As shown in FIG. 7, a forked portion 1404 for connecting the link mechanism 13 is formed.

The slider 12 is, as shown in FIG.
A cylindrical portion 1202 and two flange portions 1204 formed on the outer periphery of the cylindrical portion 1202 at intervals in the longitudinal direction of the cylindrical portion 1202;
Is provided. The shaft-shaped member 8 is inserted into the center hole 22 of the cylindrical portion 1202, and the slider 12 can slide on the shaft-shaped member 8 along the longitudinal direction of the shaft-shaped member 8. As shown in FIGS. 2, 6, and 7, a long groove 24 is formed in an open shape toward the distal end at a position where the tip of the cylindrical portion 1202 faces.

The link mechanism 13 connects the connecting member 14 and the slider 12 and is disposed in the long groove 16. The link mechanism 13 includes a first link 26 and a second link 28 as shown in FIG. In this embodiment, two first links 26 and two second links 28 are provided, but one link may be provided. An elongated hole 30 is formed near one end in the longitudinal direction of the first link 26, and as shown in FIGS.
One end of the link 26 is disposed in the elongated groove 24, and one end of the first link 26 is slidably supported via an elongated hole 30 and a shaft 32 inserted into the elongated hole 30.
As shown in FIG. 6, the other end in the longitudinal direction is rotatably connected to the shaft member 8 via a shaft 34. The second link 2
2, one end in the longitudinal direction is rotatably coupled to the forked portion 1404 via the shaft 36 as shown in FIGS. 2 and 5, and the other end in the longitudinal direction as shown in FIGS. Is shaft 38
The first link 26 is rotatably coupled to an intermediate portion of the first link 26 in the longitudinal direction.

When the slider 12 is moved on the shaft-shaped member 8, the connecting tool 14 moves in the same direction as the slider 12 via the link mechanism 13, and the wire 604 moves integrally with the connecting tool 14. In the present embodiment, FIG.
(A), a pair of forceps pieces 106 in the state shown in FIG. 2, that is, in a state where the slider 12 is located on the proximal side of the shaft-shaped member 8
Is fully closed. Then, when the thumb is hung on the finger hook portion 10, the index finger and the middle finger are hung between the flange portions 1204, and the slider 12 is slid toward the distal end side with respect to the shaft-shaped member 8, as shown in FIG. 26 rises with the shaft 34 as a fulcrum, the inclination angle of the second link 28 increases following this, the connector 14 and the wire 604 are pushed out, and the pair of forceps pieces 106 is swung in the opening direction from the fully closed state. Let it. Further, the slider 12 is moved to the distal end side of the shaft-shaped member 8, and the state shown in FIGS.
The pair of forceps pieces 106 are configured to be fully opened in a state where the slider 12 is located on the distal end side of the shaft-shaped member 8.

The amount of movement of the wire 604 per unit stroke of the slider 12 depends on the first link 26 and the second
By selecting the length of the link 28 and the position of the shaft 38 in the first link 26, desired values and properties can be set. In the present embodiment, as shown in FIG. 8, the amount of movement of the wire 604 per unit stroke of the slider 12 moved by the movement of the slider 12 (the slope of the curve in FIG. A fully closed state A which is closed and a state B which is slightly opened from the fully closed state A
A first range C in which the slider 12 moves so as to open and close between the first range C and a second range C of the slider 12 adjacent to the first range C.
(For example, the range D1, the range D2, or the range D3), the first range C is set smaller than the second range D. In this example, the forceps piece 106 is fully closed A
The first range C is set to a stroke that is approximately 1/4 of the full stroke just before the fully closed state A, when the stroke of the slider from the full stroke state E to the full stroke state E is the full stroke. Further, in a full stroke in which the pair of forceps pieces 106 are changed from the fully closed state A to the fully opened state E, when the slider 12 is moved, the wire 604 is moved by a movement amount smaller than the movement amount of the slider 12. .

Therefore, in the present embodiment, the amount of movement of the wire 604 per unit stroke of the slider 12 is small in the vicinity where the pair of forceps pieces 106 are in the fully closed state, and the fine adjustment of the open / close state of the forceps pieces 106 can be performed. This can be performed in the vicinity of the fully closed state of the forceps piece 106.

Therefore, as shown in FIG. 10 (C), a thin blood vessel 122 jumps out of the stump after the polyp 120 is excised, bleeds from the blood vessel 122, and a pair of forceps pieces 106 of the hot biopsy forceps. When taking measures to pinch a blood vessel, cauterize, coagulate, and stop bleeding, the open / closed state of the forceps piece 106 can be finely adjusted in the vicinity of the fully closed state.
Since it is possible to finely adjust the distance so as to sandwich 2, the blood vessel 122 can be easily and securely sandwiched by the pair of forceps pieces 106, and the above-described measure can be easily performed.

The amount of movement of the wire 604 per unit stroke of the slider 12 (the slope of the curve in FIG. 8) depends on the length of the first link 26 and the second link 28,
The desired value and properties can be set by selecting the position of the shaft 38 in the first link 26, by changing the configuration of the link mechanism 13 itself, or by configuring the coupling mechanism with a gear mechanism or the like. Can be. For example, FIG.
As shown in FIG. 5, an intermediate state between the fully open state E and the fully closed state A of the pair of forceps pieces 106 is referred to as an intermediate state F.
When the first range is between the fully closed state A and the intermediate state F and the second range is between the intermediate state F and the fully opened state E, the movement of the wire 604 per unit stroke of the slider 12 in the first range The amount of the slider 1 in the second range
It may be set to be smaller than the movement amount of the wire 604 per 2 unit strokes. Even in such a setting, fine adjustment of the open / close state of the forceps piece 106 can be performed in the vicinity of the fully closed state of the forceps piece 106 as described above, and the thin blood vessel 122 and the like can be easily and reliably sandwiched, and various measures can be easily performed. Is made. As is clear from FIG. 8, the amount of movement of the wire 604 per unit stroke of the slider 12 (the slope of the curve in FIG. 8) is set small immediately before the fully closed state A and immediately before the fully opened state E. However, in the first range C in which the slider 12 moves so as to open and close between the fully closed state A and the slightly opened state B of the forceps piece 106, the total movement amount of the wire 604 is The average movement amount of the wire 604 per unit stroke of the slider 12 divided by the total movement amount is the remaining range G in which the slider 12 moves so as to open and close between the state B and the fully opened state E of the forceps piece 106. Is set to be smaller than the average movement amount of the wire 604 at. Therefore, by setting the average movement amount in this way, the same operation and effect as described above can be obtained.

The present invention is not limited to hot biopsy forceps using a high-frequency current, and is not limited to the size of a pair of forceps pieces, but is widely applied to all types of forceps.

[0017]

As is clear from the above description, the present invention
An operating part, a pair of forceps pieces, and a connecting wire connecting the operating part and the pair of forceps pieces, wherein the operating part slides on a shaft-shaped member extending a predetermined length and the shaft-shaped member; A biopsy forceps comprising a slider operably connected to the connection wire, and opening and closing a pair of forceps pieces via the connection wire by moving the slider along the shaft-shaped member, wherein the pair of forceps In the vicinity where the piece becomes fully closed,
The pair of forceps pieces are configured to open and close slowly. Therefore, the open / closed state of the forceps piece can be finely adjusted in the vicinity of the fully closed state of the forceps piece, and various measures using the biopsy forceps can be easily performed.

[Brief description of the drawings]

FIGS. 1A and 1B are cross-sectional views of an operation unit of a biopsy forceps.

FIG. 2 is a cross-sectional view of an operation unit with a forceps piece in a fully closed state.

FIG. 3 is a cross-sectional view of the operation unit when the open / close state of the forceps piece is an intermediate state.

FIG. 4 is a cross-sectional view of the operation unit with a forceps piece in a fully opened state.

FIG. 5 is a sectional view taken along line CC in FIG. 1 (A).

FIG. 6 is a sectional view taken along line DD of FIG.

FIG. 7 is a cross-sectional view of a cross section taken along line EE and line FF in FIG.

FIG. 8 is a graph showing the relationship between the amount of movement of a slider and the amount of movement of a wire.

FIG. 9 is a front view of a conventional biopsy forceps.

FIGS. 10A, 10B, and 10C are explanatory diagrams when a thin blood vessel protruding from a stump after a polyp is cut is sandwiched by a pair of forceps pieces.

[Explanation of symbols]

 2 Biopsy forceps 4 Operation part 6 Connection wire 8 Shaft member 10 Finger hook part 12 Slider 13 Link mechanism 14 Connector 16 Long groove 26 First link 28 Second link 106 A pair of forceps pieces

Claims (11)

[Claims] An operating portion, a pair of forceps pieces, and a connection wire connecting the operating portion and the pair of forceps pieces, wherein the operating portion has a shaft-shaped member extending a predetermined length; A biopsy forceps comprising a slider slidably coupled to the connection member and connected to the connection wire, and moving the connection wire by moving the slider along the shaft member to open and close a pair of forceps pieces; The slider and the connection wire are connected via a connection mechanism. The connection mechanism is configured such that the movement amount of the wire per unit stroke of the slider moved by the movement of the slider is in a fully closed state in which the pair of forceps pieces are fully closed. And a first range in which the slider moves so as to open and close between the fully closed state and a slightly open state, and a second range of the slider adjacent to the first range. Range of But the second
A biopsy forceps, which is set to be smaller than the range. 2. An operating part, a pair of forceps pieces, and a connecting wire connecting the operating part and the pair of forceps pieces, wherein the operating part has a shaft-shaped member extending a predetermined length, A biopsy forceps comprising a slider slidably coupled to the connection member and connected to the connection wire, and moving the connection wire by moving the slider along the shaft member to open and close a pair of forceps pieces; The slider and the connection wire are connected via a connection mechanism. When the stroke of the slider for bringing the pair of forceps pieces from the fully opened state to the fully closed state is a full stroke, the slider is almost 1/100 of the full stroke before the fully closed state. In the fourth stroke, the amount of movement of the wire per unit stroke of the slider moved by the movement of the slider is approximately the same as the stroke adjacent to the quarter stroke. Biopsy forceps of wire is smaller than the amount of movement of it, characterized in. 3. An operating section, a pair of forceps pieces, and a connection wire connecting the operating section and the pair of forceps pieces, wherein the operating section includes a shaft-shaped member extending a predetermined length, A biopsy forceps comprising a slider slidably coupled to the connection member and connected to the connection wire, and moving the connection wire by moving the slider along the shaft member to open and close a pair of forceps pieces; The slider and the connection wire are connected via a connection mechanism, a state between a fully opened state and a fully closed state of the pair of forceps pieces is set as an intermediate state, and a range between the intermediate state and the fully closed state is set as a first range. When the range between the intermediate state and the fully open state is a second range, the connecting mechanism may be configured such that the amount of movement of the wire per unit stroke of the slider that is moved by the movement of the slider in the first range is within the second range. At It is set smaller than the moving amount of the wire of the unit per stroke of the slider which is moved by the movement of the rider, biopsy forceps, characterized in that. 4. An operating part, a pair of forceps pieces, and a connection wire connecting the operating part and the pair of forceps pieces, wherein the operating part has a shaft-shaped member extending a predetermined length, A biopsy forceps comprising a slider slidably coupled to the connection member and connected to the connection wire, and moving the connection wire by moving the slider along the shaft member to open and close a pair of forceps pieces; The slider and the connection wire are connected via a connection mechanism, and the connection mechanism is configured such that an average movement amount of the wire per unit stroke of the slider obtained by dividing a total movement amount of the wire by a total movement amount of the slider is equal to the pair of the pair. A first range in which the slider moves so as to open and close between a fully closed state in which the forceps piece is fully closed and a state in which the forceps piece is slightly opened from the fully closed state; Fully opened Remaining in the range, the direction of the first range is set smaller than the second range, biopsy forceps, characterized in that the moving slider to open and close during the on purpose. 5. The shaft-shaped member has a long groove extending in an extending direction of the shaft-shaped member, an end of the connection wire is inserted into the long groove, and the connecting mechanism is connected to the long groove. The biopsy forceps according to claim 1, 2, 3 or 4, wherein the forceps is inserted into the inside and connects the end of the wire with the slider. 6. The biopsy forceps according to claim 5, wherein a connecting member is attached to an end of the connecting wire, and the connecting mechanism connects the connecting member and a slider. 7. The connecting mechanism according to claim 1, wherein the connecting mechanism is a link mechanism including a plurality of links.
The biopsy forceps according to the item. 8. The link mechanism according to claim 7, wherein the link mechanism includes a first link bridged between the slider and the shaft-like member, and a second link bridged between the first link and the connector. Biopsy forceps. 9. The connecting wire comprises a sheath tube and a wire inserted into the sheath tube, and the end of the sheath tube is attached to a shaft-like member, and the end of the wire is connected to the connecting member. 7. The biopsy forceps according to claim 6, wherein the forceps is attached to the biopsy forceps. 10. The biopsy forceps according to claim 1, wherein the connection wire is moved in the same direction as the slider by moving the slider. 11. An operating part, a pair of forceps pieces, and a connecting wire connecting the operating part and the pair of forceps pieces, wherein the operating part includes a shaft-shaped member extending a predetermined length, A biopsy forceps comprising a slider slidably coupled to a connection member and connected to the connection wire, wherein the movement of the slider along the shaft member opens and closes a pair of forceps pieces via the connection wire. A biopsy forceps, wherein the pair of forceps pieces is slowly opened and closed in the vicinity where the pair of forceps pieces are fully closed.