JPH0731009U - Variable angle endoscopic surgical forceps - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention adjusts the angle of the distal forceps portion of surgical forceps under an endoscope like the conventional forceps using a coil spring or a rubber tube as a part of the forceps. At the time of operation, the curvature in bending is large, and there is no defect of weak force transmission,
The force of the operating handle is directly transmitted to the distal forceps by the link mechanism of the two pin shafts at the attachment base of the distal forceps to prevent blurring and loss of force, and the distal forceps can be easily approached to the surgical site. The purpose is to enable safe and reliable treatment. According to the present invention, the base portion of the distal forceps portion of the pipe-shaped surgical forceps and the distal end on the main body side are connected by a link mechanism using two pin shafts, and the force of the main body side handle is directly transmitted to the distal forceps portion. In this way, by bending the tip forceps portion at a free angle, loss of force in bending and weak gripping force of the tip forceps portion were prevented. The tube and the outer tube have a triple structure, which is housed inside the outer tube to make it compact and usable through a conventional puncture tube.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a surgical instrument used for grasping and peeling organs, blood vessels and other tissues during endoscopic surgery.

[0002]

[Prior art]

 It has long been attempted to observe the inside of the human body under an endoscope, and various instruments have been developed, and in recent years, not only observation but also treatment and surgery have been performed under the endoscope. ing. The first laparoscopic surgical procedure, such as a cholecystectomy, was performed in France in 1987 for the first time. The number of surgical procedures using this surgical procedure increased in Europe, the United States, and Japan. Surgery other than cholecystectomy has been studied and tried. The advantages of this operation are: (1) It does not rely on laparotomy, so it does not leave a cosmetic deformity. (2) Post-operative pain is light. (3) The hospital stay is short. Drawbacks include (1) Inadequate surgery due to the narrow field of view and the need for the operator to be skilled in the technique. (2) Bleeding or biliary tract injury may occur.

Inadequate surgery, bleeding, and damage, which are the drawbacks, not only have a narrow field of view, but most surgical instruments are inflexible and rigid, so that they can be operated from a free angle such as open surgery. This is because it is impossible to get close to the surgical site.

[0004] In addition to the one having a rigid pipe portion, there is a flexible instrument that can be bent as a surgical instrument and a surgical instrument under the endoscope. This soft instrument has flexibility by replacing part of the pipe with a coil spring or rubber tube. However, since this soft instrument has a weak fixing force, it is difficult to bring it close to the target site, it is not possible to transmit the force sufficiently when grasping and peeling, and the bending curvature becomes large, so it is used in narrow body parts. It has a difficult drawback.

[0005]

[Problems to be solved by the device]

 In the above-mentioned endoscopic surgery, a blood vessel or an organ in a narrow region of the surgical field can be easily approached from a free angle to perform a reliable treatment.

[0006]

[Means for Solving the Problems]

 According to the present invention, the distal forceps portion of the pipe-shaped rigid surgical forceps inserted through the puncture tube into the surgical site under the endoscope can be adjusted to a desired rotation angle with respect to the axis of the pipe-shaped main body. The force transmitting part for operating the forceps base is made to be rotatable, and the base of the tip forceps and the body side tip are connected by two pin shafts. With the shaft link mechanism, the forceps on the main body can be bent at any angle with respect to the axis of the main body by operating the handle on the main body. In addition, the main body side that rotates and adjusts the angle of the tip forceps part is used as a triple structure of a shaft, an inner cylinder, and an outer cylinder in an outer cylinder so that it can be used through commonly used puncture tubes of 5 mm and 10 mm. It was possible to make it compact as possible.

[0007]

【Example】

 FIG. 1 is a front view of the forceps for angle-variable endoscopic surgery according to the present invention, FIGS. 2 to 6 are explanatory views of opening and closing the tip of the forceps according to the present invention, and FIG. 2 is a view from the handle portion on the main body side to the tip opening and closing portion. In order to make it easier to understand the transmission of the operating force, the transmission part in the middle is indicated by chained lines. 3 is an enlarged front view of the front end opening / closing portion, FIGS. 4 and 5 are explanatory views of the tip opening / closing mechanism, FIG. 6 is a structural explanatory view of an opening / closing member to which forceps are attached, and FIG. It is a top view. FIG. 7 is an explanatory view of the angle adjusting mechanism of the distal end forceps, and FIG. 8 is an explanatory view showing a state in which the outer cylinder tip part is bifurcated so that the outer cylinder tip part is also opened when the tip forceps is opened. Is. As shown in FIG. 1, the body side of the forceps of the present invention is composed of an outer cylinder 1, an inner cylinder 2, and a triple structure portion of a shaft 3, and grips 5 and 6 which are opened and closed with a set screw 4 as a shaft on the base side thereof. The base of the inner cylinder 2 is screwed into the axially extending head 7 at the upper part of the one handle 5. The base of the shaft 3 is connected to the head of the other handle 6 with a screw 8 and is screwed to a short columnar member 9 that moves in the axial direction. Further, a quadrangular frame 10 is attached to the base side of the outer cylinder 1, and a screw 1 that is screwed into the inner cylinder 2 is fitted and inserted in this frame. Next, the structure of the forceps of the present invention on the front side of the main body will be described. As shown in FIGS. 2, 3 and 4, a member 12 having a semi-cylindrical columnar shape whose front part is bifurcated is coupled to the tip of the shaft 3, and further, the bifurcated parts 13, 14 of the member 12 are connected. The bases of the opening / closing members 15 and 16 for attaching forceps are connected to the distal ends. Further, an extension portion 17 having a cylindrical outer shape is formed at the front end of the inner cylinder 2 so as to be vertically overlapped with the member 12, and at the front end of the extension portion 17, as shown in FIG. A wall portion 18 is provided, the standing wall portion 18 is fitted between the forked split portions 13 and 14 of the member 12, and the two pin shafts a and b of the base portion of the opening / closing members 15 and 16 are attached to the tip of the standing wall portion 18. The opening / closing members 15 and 16 to which one shaft a is connected and to which forceps are attached have the same structure, and the forceps attached to the tip of the opening / closing member also have the same structure. As shown in FIG. 6, at the base of the opening / closing member, a hole a ′ for connecting the tip of the standing wall portion 18 of the extension portion of the tip of the inner cylinder with the pin shaft a and the tip of the divided portion of the member 12 to which the shaft 3 is connected are formed. Is provided with a pin shaft b, and these holes are provided such that the hole a'is located on the shaft center line side and the hole b'is located outside the shaft center line. . Further, the base of the tip forceps 21 is provided with a pin hole which is attached to the tip of the opening / closing member by the shaft pin c and a hole which is attached to the tip of an outer cylinder tip extension portion described later and the shaft pin d. Next, the structure of the tip of the outer cylinder and the attachment structure of the tip of the forceps will be described. As shown in FIGS. 7 and 8, the tip of the outer cylinder 1 is provided with a member 12 connected to the shaft 3 and bifurcated pieces 19 and 20 extending forward along the opening / closing members 15 and 16 connected thereto. The bifurcated piece is projectingly provided, and the tip of the bifurcated piece is connected to one of the shaft pins d of the base portion of the tip forceps.

[0008]

[Operation and effect of the device]

 The forceps of the present invention configured as described above is inserted into the surgical site through the puncture tube under the endoscope, and when grasping or peeling the target site, the distal forceps is directed in the desired direction. When the outer cylinder 1 connected with the shaft pin d is turned, the shaft 3 side connected with the tip forceps base portion with the shaft pin c is connected with the columnar member 9 and the shaft 3 side is connected with the shaft pin a. Since the inner cylinder 2 side is rotatably coupled to the upper extension head 7 of the handle 5, the tip forceps can be oriented at a desired rotation angle. Further, in order to incline the tip forceps portion to an angle at which the target portion can be easily gripped or peeled off, the screw 11 fitted into the frame 10 attached to the base portion of the outer cylinder 1 is rotated, and the screw 11 is rotated. Since the frame 10 moves in the axial direction and the frame 10 also moves in the axial direction, the tip forceps connected to the tip portion of the outer cylinder 1 by the pin shaft can be adjusted to a desired inclination angle with respect to the axial direction. As described above, the forceps of the present invention is a pipe-shaped rigid instrument, but the tip forceps can be adjusted to a desired rotation angle with respect to the axial direction, and the base of the tip forceps and the main body side have two pins. It is possible to perform a safe and secure treatment by connecting with a shaft and bending the tip forceps to a free angle with respect to the axial direction and easily approaching them by the operation on the main body side by the link mechanism by the two pin shafts. In addition, the conventional forceps that uses a coil spring and a rubber tube in a part of the pipe part of the forceps is soft and has a large curvature in bending, so it is difficult to approach the target site in a narrow place. However, due to the weak fixing force, it was not possible to transmit the force sufficiently, but the forceps of the present invention adopts a link mechanism to transmit the force of the handle directly to the operation site, and it is possible to prevent blurring and loss of force. . In addition, the triple structure of the shaft 3, the inner cylinder 2 and the outer cylinder 1 is housed in the outer cylinder 1 so as to be compact and has a feature that it can be used through the conventional 5 mm and 10 mm puncture tubes.

[Brief description of drawings]

FIG. 1 is a front view of a forceps for endoscopic surgery with variable angle according to the present invention.

FIG. 2 is an explanatory view of transmission of an operating force from the grip portion on the main body side of the forceps of the present invention to the tip opening / closing portion.

FIG. 3 is an enlarged front view of the tip opening / closing section.

[Figure 4]

FIG. 5 is an explanatory view of a tip opening / closing mechanism.

6A and 6B are structural explanatory views of an opening / closing member to which a tip forceps portion is attached.

FIG. 7 is an explanatory view of an angle adjusting mechanism of a tip forceps portion.

FIG. 8 is an explanatory view showing a state in which the outer cylinder tip portion is bifurcated so that the outer cylinder tip portion is also opened when the tip forceps portion is opened.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Outer cylinder 2 ... Inner cylinder 3 ... Shaft 4 ... Screw 5, 6 ... Grip 7 ... Extension head 8 ... Screw 9 ... Short columnar member 10 ... Frame 11 ... Screw 12 ... Member 13 connected to the tip of shaft 3 , 14 ... Bifurcated part of member 12 15, 16 ... Opening / closing member for attaching forceps 17 ... Extension part of inner cylinder 18 ... Front end standing wall part of extension part 17, 20 ... Extension bifurcated part in front of outer cylinder 1 21. ... Forceps at the tip a, b, c, d ... Shaft pin

Claims (1)

[Scope of utility model registration request] 1. In the forceps for endoscopic surgery, the body side of the forceps is formed into a triple structure of an outer cylinder 1, an inner cylinder 2 and a shaft 3, and the inner cylinder 2
Is rotatably coupled to the upper axial extension head 7 of one handle 5 of the operating handle, and the base of the shaft 3 is rotatably coupled to the upper member 9 of the other handle 6, and to the base of the outer cylinder 1. Attaches a rectangular frame 10, fits a screw 11 that is screwed into the inner cylinder 2 in the frame, and the front side of the main body is located between the tip of the shaft 3 and the tip forceps portion 21 at the base of the tip forceps portion. Forceps opening member 15, 1 that connects with one of the two pin shafts c, d provided
6 and a front bifurcated member 12 that is connected to one of the two pin shafts a and b provided at the base of the open members 15 and 16, and the front end of the inner cylinder 2 is connected to the bifurcated member. 12 is provided with an extension portion 17 which is vertically overlapped with the extension portion 17, and the extension portion front end is connected to the other pin shaft a of the base portion of the opening / closing members 15 and 16,
Further, in the front of the outer cylinder 1, bifurcated pieces 19 and 20 are provided so as to extend along the opening members 15 and 16, and two pins provided at the base of the tip forceps portion 21 at the tips of the bifurcated pieces 19 and 20. A variable angle endoscopic surgical forceps that is connected to the other pin axis d of the shaft.