JP2023127041A - Surgical tractor - Google Patents

Abstract

To provide a surgical tractor used without disturbing an operation by a surgeon.SOLUTION: A surgical tractor 1 includes a handle member 10 gripped by a user, an insertion member 20 which makes contact with and acts on a human body, and a rotatable connecting member 30 which rotatably connects the handle member 10 and the insertion member 20. A handle side connecting part 11 which is a part for connecting the handle member 10 and the insertion member 20 is tabular, and an insertion side connecting part 21 which is a part for connecting the insertion member 20 and the handle member 10 is tabular. The rotatable connecting member 30 rotatably connects the handle side connecting part 11 and the insertion side connecting part 21 in an overlapped state by a rotating shaft perpendicular to the handle side connecting part 11 and the insertion side connecting part 21.SELECTED DRAWING: Figure 1

Description

The present invention relates to a retractor, which is an instrument used in surgical operations.

Conventionally, a large number of surgical retractors have been provided for suppressing and moving tissues that obstruct the surgeon's field of vision during surgical operations, and for example, those disclosed in Patent Documents 1 to 3 listed below are available. .

Japanese Patent Application Publication No. 2009-254752 Japanese Patent Application Publication No. 2018-43066 JP 2019-130043 Publication

When a retractor is used in a surgical procedure, an assistant holding the handle of the retractor stands next to the surgeon, contacts the distal insertion section of the retractor against human tissue, and presses it down. I move it.

At this time, the standing position of the assistant, who is required to bring the retractor into effective contact with human tissue, often overlaps with the standing position of the surgeon, and the surgeon and assistant may come into contact with each other, interfering with the surgery. many.

The present invention has been made in view of these problems, and an object of the present invention is to provide a surgical retractor that can be used without interfering with a surgeon's surgery.

In order to solve the above problems, a surgical retractor according to the present invention includes a handle member held by a user, an insertion member that contacts the human body, and a rotatable connection between the handle member and the insertion member. and a rotational connection member.

According to the surgical retractor according to the present invention, by appropriately adjusting the intersecting angle between the handle member and the insertion member, the surgical retractor can be used without interfering with the surgeon's operation.

FIG. 1 is a perspective view of a retractor according to an embodiment of the invention. FIG. 2 is a perspective view of a handle member according to an embodiment of the invention. FIG. 3 is a perspective view of an insertion member according to an embodiment of the invention. FIG. 4 is a perspective view of a rotational connection member according to an embodiment of the present invention. FIG. 5 is a plan view for explaining the usage state of the retractor according to the embodiment of the present invention.

Hereinafter, a surgical retractor according to an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a Hohmann retractor used as a surgical retractor inserted between bones and muscles in knee joint surgery will be described as an example.

As shown in FIG. 1, the retractor 1 includes a handle member 10 that is held by a user, an insertion member 20 that contacts human tissue, and a handle member 10 and the insertion member 20 that are rotatable around a rotation axis. The rotary connecting member 30 is connected to the rotary connecting member 30.

As shown in FIG. 2, the handle member 10 is an elongated strip-shaped flat plate member, and a handle-side connecting portion 11, which is a connecting portion with the insertion member 20, is installed at the tip thereof. Moreover, a plurality of holes are formed in the handle member 10 for weight reduction.

A connection hole 12 is formed in the center of the handle side connection part 11, into which a bolt 31, which will be described later and which functions as a rotation axis, is inserted. A non-slip uneven portion 14 is provided with a large number of protrusions.

The insertion member 20 is a member that comes into contact with the human body during surgery, and is located on the distal end side of the handle member 10. As shown in FIG. 3, the insertion member 20 is formed by curving a part of an elongated flat plate member, and an insertion side connecting portion 21 that is a connecting portion with the handle member 10 is installed at the base of the insertion member 20. has been done.

A connecting hole 22 is formed in the center of the insertion-side connecting portion 21, into which a bolt 31 (described later) is inserted, and a bolt 31 (described later) is formed on the outer surface of the insertion-side connecting portion 21 opposite to the inner surface that contacts the handle member 10. A locking recess 24 is formed into which the bolt head 32 of No. 31 is fitted and locked. The shape of the locking recess 24 is the same as the shape of the bolt head 32, and is slightly larger.

As shown in FIG. 4, the rotational connection member 30 includes a bolt 31 that functions as a rotation shaft, a nut 33, and a washer 35. The bolt 31 has a bolt head 32, and when connecting the handle member 10 and the insertion member 20, the bolt 31 is inserted from the insertion member 20 side into the connecting holes 12, 22 connected with the connecting parts 11, 21 overlapped. Insert the tip of the male threaded portion 31a. Upon insertion, when the bolt head 32 fits into the locking recess 24 of the insertion member 20, the bolt 31 is fixed to the insertion member 20 in the direction around the rotation axis, and rotation is prevented.

The nut 33 is located on the outer side of the handle member 10 and is screwed onto the male threaded portion 31a of the bolt 31 from its tip. A washer 35 through which the male threaded portion 31 of the bolt 31 is passed is interposed between the nut 33 and the outer surface of the handle member 10.

When the handle member 10 and the insertion member 20 are screwed together by the bolt 31 and the nut 33 and tightened in the direction of the rotation axis, the inner surface of the handle-side connecting portion 11 of the handle member 10 and the insertion side of the insertion member 20 are connected. The inner surface of the connecting portion 21 comes into pressure contact, and the handle member 10 and the insertion member 20 cannot rotate relative to each other around the rotation axis.

Here, an anti-slip uneven part 14 is formed on the inner surface of the handle side connecting part 11, and the pressure at the contact part between the connecting parts 11 and 21 increases, and when the rotating connecting member 30 is tightened with the screw, , the handle member 10 and the insertion member 20 are firmly fixed so that they do not rotate relative to each other around the rotation axis.

On the other hand, when the bolt 31 and nut 33 of the rotational connection member 30 are loosened, the handle member 10 and the insertion member 20 become relatively rotatable around the rotation axis, and the intersecting angle between the two can be freely changed. Become.

Thus, in this embodiment, the intersection angle between the handle member 10 and the insertion member 20 of the retractor 1 is adjustable. Here, in this embodiment, the intersection angle between the handle member 10 and the insertion member 20 is the angle formed by the longitudinal direction of the handle member 10 and the longitudinal direction of the insertion member 20.

For example, when the intersection angle between the handle member 10 and the insertion member 20 is fixed to 0° by the rotational connection member 30, the handle member 10 and the insertion member 20 are located on the same straight line, and the retractor 1 is completely (see FIG. 5(a)). Further, when the intersection angle is 90°, the handle member 10 and the insertion member 20 intersect at a right angle, and the retractor 1 as a whole has a shape bent at a right angle (see FIG. 5(b)).

In addition, when the handle member 10 and the insertion member 20 are connected by the rotational connection member 30 so that the intersecting angle is 90°, the handle member 10 and the insertion member 20 intersect at right angles, and during surgery Basically, the assistant stands on a straight line intersecting the longitudinal axis of the insertion member 20 at right angles and grasps the retractor 1.

In other words, when the intersection angle is 90°, the assistant is not in front of the affected area to be operated on, but can stand in a position away from the front to the left and right, and in a position where he does not collide with the surgeon who is standing in front of the affected area. Can stand.

Here, the handle member 10 is made of stainless steel (SUS), and the insertion member 20 is made of aluminum. Stainless steel members have high strength but low X-ray transmittance, and aluminum members have lower strength than stainless steel but have high X-ray transmittance.

In this embodiment, the insertion member 20 that comes into contact with the human body during surgery is made of aluminum, so that when performing surgery under X-ray fluoroscopy, an X-ray image of human tissue located on the back side of the insertion member 20 through which X-rays are transmitted can be obtained. The surgery can be performed while checking the Furthermore, by making the handle member 10, which is the part held by the assistant, of stainless steel, the strength of the retractor 1 can be ensured.

The configuration of the retractor 1 has been described above, and next, the manner in which the retractor 1 is used will be described. It is assumed that an assistant using the retractor 1 stands in a position that does not interfere with the surgeon performing the surgery, grasps the handle member 10 of the retractor 1, and brings the insertion member 20 into contact with a predetermined human tissue. Anticipate the appropriate crossing angle of retractor 1.

Next, the assistant tightens the rotation connection member 30 while loosening the rotation connection member 30 and rotating the handle member 10 and the insertion member 20 relative to each other so that they intersect at the predicted crossing angle. and connect and fix both at the intersection angle.

In this way, by appropriately adjusting the intersection angle of the retractor 1, the assistant can grasp the retractor 1 not only in front of the affected area to be operated on, but also while standing at a desired position that does not interfere with the surgeon. It becomes possible. Of course, it is also possible to change the connection crossing angle of the retractor 1 and move the standing position as necessary during the surgery.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the gist of the present invention. For example, the shape, size, material, etc. of the members constituting the retractor 1 can be changed as appropriate, and the shapes of the handle member and the insertion member are not limited to the flat plate shape of an elongated band, but can be changed as appropriate.

Further, the anti-slip uneven portion and the locking recess may be formed on either the handle member or the insertion member. Further, in the above embodiment, a surgical retractor that is held and used by an assistant has been described, but the present invention can also be applied to a surgical retractor that is used by being fixed to a device such as an arm member. can.

1 Retractor 10 Handle member 11 Handle side connection part 12 Connection hole 14 Anti-slip uneven part 20 Insertion member 21 Insertion side connection part 22 Connection hole 24 Locking recess 30 Rotating connection member 31 Bolt 32 Bolt head 33 Nut 35 Washer

Claims (5)

a handle member held by a user;
an insertion member that comes into contact with the human body;
a rotational connection member that rotatably connects the handle member and the insertion member;
A surgical retractor comprising: A handle-side connecting portion, which is a portion of the handle member that is connected to the insertion member, has a flat plate shape,
An insertion-side connecting portion that is a portion of the insertion member that is connected to the handle member is flat,
The rotational connecting member is rotatably connected to the handle-side connecting portion and the insertion-side connecting portion by a rotation axis perpendicular to the handle-side connecting portion and the insertion-side connecting portion in a state where the handle-side connecting portion and the insertion-side connecting portion are overlapped. A surgical retractor according to claim 1, characterized in that: A claim characterized in that a contact surface of the handle-side connecting portion with the insertion-side connecting portion or a contact surface of the insertion-side connecting portion with the handle-side connecting portion is formed with anti-slip irregularities. The surgical retractor according to item 2. The rotational connection member includes a bolt and a nut that function as the rotational shaft,
A locking recess into which the bolt head of the bolt fits is formed on a surface of the handle-side connecting portion opposite to the insertion member or on a surface of the insertion-side connecting portion opposite to the handle member;
The surgical retractor according to claim 2 or 3, wherein when the bolt is connected, the bolt head fits into the locking recess, thereby preventing the bolt from rotating about the rotation axis. 5. The surgical retractor according to claim 1, wherein the handle member is made of stainless steel and the insertion member is made of aluminum.

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