Ring-shaped member

Abstract

Provided is a ring-shaped member for an organ retractor that can lift or displace an organ regardless of the distance between the organ and the anchor point. 【Solution means】The present invention relates to a ring-shaped member 1 used for an organ retractor 10 including a clip 2 attached to an organ and a needle 3 attached to an anchor point in a state where the organ is pulled via the clip 2. The ring-shaped member 1 includes an elastic ring 4 formed in an annular shape and interconnecting the clip 2 and the needle 3, and a stopper 5 attached to the elastic ring 4 for adjusting the distance between the clip 2 and the needle 3. According to this configuration, since the distance between the clip 2 and the needle 3 can be adjusted, the organ can be lifted or displaced regardless of the distance between the organ and the anchor point.

Description

Technical Field

[0001] The present invention relates to a ring-shaped member used for an organ retractor for retracting organs in surgical operations, particularly laparoscopic surgeries and surgeries using surgical support robots.

Background Art

[0002] Conventionally, in surgical operations, it may be necessary to lift or displace organs in order to secure the visual field or the surgical field. Such lifting or displacement has conventionally been performed by the hands of the surgeon or the surgical assistant. However, this causes the hands of the surgeon or the surgical assistant to be obstructed, reducing the operability. In addition, there is a problem that the hands become fatigued if the lifting or displacement continues for a long time. Further, in laparoscopic surgeries and surgeries using surgical support robots, etc., the surgeon or the like cannot directly perform the lifting or displacement.

[0003] Therefore, an organ retractor has been developed in which a clip attached to an organ is provided at one end of a long elastic band, and a needle attached to an anchor point such as the abdominal wall is provided at the other end of the elastic band (see, for example, Patent Document 1). Such an organ retractor, for example, in laparoscopic cholecystectomy, attaches a clip to the bottom of the gallbladder and attaches the needle to the anchor point so that tension is applied to the elastic band, thereby lifting the gallbladder without using the hands of the surgeon or the surgical assistant.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the organ retractor as described above, when the distance between the organ and the anchor point is short, sufficient tension may not be applied to the elastic band, and the organ may not be lifted or displaced.

[0006] The present invention solves the above problems, and an object thereof is to provide a ring-shaped member for an organ retractor that can lift or displace an organ regardless of the distance between the organ and the anchor point.

Means for Solving the Problems

[0007] The present invention is a ring-shaped member used for an organ retractor including a clip attached to an organ and a needle attached to an anchor point in a state where the organ is pulled through the clip, and includes an elastic ring formed in an annular shape and connecting the clip and the needle to each other, and a stopper attached to the elastic ring for adjusting the distance between the clip and the needle.

[0008] The stopper preferably has an insertion hole through which an end portion of the elastic ring is inserted, and a pair of contact portions that are in close contact with the outer periphery of the elastic ring are provided in the insertion hole.

[0009] The elastic ring preferably has a large-diameter portion and a small-diameter portion that are alternately connected along its circumference, and the contact portion preferably fits into one of the small-diameter portions.

Effects of the Invention

[0010] According to the ring-shaped member for an organ retractor of the present invention, the distance between the clip and the needle can be adjusted, so that the organ can be lifted or displaced regardless of the distance between the organ and the anchor point.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying out the Invention

[0012] The ring-shaped member for an organ retractor according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the ring-shaped member 1 constitutes an organ retractor 10 together with a clip 2 that is reversibly attached to an organ in laparoscopic surgery and a needle 3 that is reversibly attached to an anchor point such as the abdominal wall. The ring-shaped member 1 has an elastic ring 4 that interconnects the clip 2 and the needle 3, and a stopper 5 for adjusting the distance between the clip 2 and the needle 3.

[0013] The clip 2 has a pair of tip jaws 21, a pair of gripping portions 22 that are connected to each of the tip jaws 21, and a spring 23 that connects the pair of gripping portions 22 to each other. The spring 23 is a member formed by processing a metal linear member into a coil spring shape. Between the tip jaws 21 and the gripping portions 22, the upper gripping portion 22 in the drawing interlocks with the lower tip jaw 21, and the lower gripping portion 22 in the drawing interlocks with the upper tip jaw 21, crossing in an X shape.

[0014] The spring 23 is formed such that, in a state where no external force is applied, the pair of gripping portions 22 formed in a substantially flat plate shape are arranged parallel to each other, and the pair of tip jaws 21 are in a state of meshing with each other. Further, when an external force is applied to bring the pair of gripping portions 22 closer to each other, the pair of tip jaws 21 move away from each other and open, enabling the organ to be gripped. Then, when the external force disappears, the pair of gripping portions 22 return to a parallel state by the biasing force of the spring 23, and the pair of tip jaws 21 close again.

[0015] The needle 3 has an attachment portion 31 attached to the elastic ring 4, a straight portion 32 extending linearly from the attachment portion 31, and a curved portion 33 curved from the tip of the straight portion 32 toward the attachment portion 31. The attachment portion 31 is formed by processing the rear end portion of the linear member constituting the needle 3 into a circular shape. The rear end of the attachment portion 32 and the straight portion 32 are not joined and there is a slight gap, and by passing the elastic ring 4 through this gap, the needle 3 is attached to the ring-shaped member 1.

[0016] The elastic ring 4 is formed of an annular silicone rubber. When the elastic ring 4 is looped around the spring 23 of the clip 2, the annular portion on the side where the stopper 5 is attached becomes the adjustment portion 41, and the annular portion on the side where the needle 3 is attached becomes the use portion 42 that determines the distance between the clip 2 and the needle 3. Then, it is detachably attached to the spring 23 by passing the use portion 42 through the annular portion of the adjustment portion 41 on the side of the spring 23 from the stopper 5.

[0017] The stopper 5 is attached to the adjustment portion 41 from the end opposite to the spring 23. As a result, an adjustment surplus portion 43 in a loop shape is formed on the side opposite to the spring 23 with the stopper 5 sandwiched in the adjustment portion 41. The needle 3 is attached to the side opposite to the spring 23 in the use portion 42.

[0018] As shown in Fig. 2(a), the elastic ring 4 has a circular shape and has large-diameter portions 44 and small-diameter portions 45 arranged alternately along its circumference in a state where the stopper 5 is not attached. The large-diameter portion 44 is formed to be slightly thicker than the diameter of the close-contact portion 53 described later in the normal state, and becomes thinner than the diameter of the close-contact portion 53 in a state where the elastic ring 4 is stretched.

[0019] As shown in Fig. 2(b), the stopper 5 has a circular button-shaped main body 51 and an insertion hole 52 provided at the center of the main body 51 through which the end of the adjustment portion 41 is inserted. A pair of contact portions 53 that are in close contact with the outer periphery of the adjustment portion 41 are provided in the insertion hole 52. Each contact portion 53 fits into one of the small diameter portions 45 to restrict the stopper 5 from easily sliding along the elastic ring 4.

[0020] The organ retractor 10 configured as described above is preferably used to lift or displace organs in normal laparotomy or endoscopic surgery. Hereinafter, the operation when using the organ retractor 10 in laparoscopic surgery will be described with reference to Figs. 3(a) to (d).

[0021] First, as shown in Fig. 3(a), the clip 2 is attached to an organ O such as the gallbladder or the liver. At this time, even if the curved portion 33 of the needle 3 is attached to an anchor point (for example, the abdominal wall W), there may be a case where sufficient tension is not applied to the elastic ring 4 and the organ O cannot be lifted or displaced. In such a case, as shown in Fig. 3(b), the stopper 5 is gripped with the first forceps C1, and the tip of the second forceps C2 is passed through the adjustment surplus portion 43 of the elastic ring 4. Then, as shown in Fig. 3(c), the second forceps C2 is moved so that the adjustment surplus portion 43 becomes larger, and the used portion 42 is made smaller. Thereby, the distance between the clip 2 and the needle 3 is reduced, and as shown in Fig. 3(d), when the needle 3 is attached to the abdominal wall W, sufficient tension is applied to the elastic ring 4, and the organ O can be lifted or displaced.

[0022] According to the ring-shaped member 1 as described above, since the distance between the clip 2 and the needle 3 can be adjusted, when the distance between the organ and the anchor point is short and sufficient tension is not applied to the elastic ring 4, the used portion 42 can be made smaller and the clip 2 and the needle 3 can be brought closer to each other. Thereby, the organ can be lifted or displaced regardless of the distance between the organ and the anchor point.

[0023] In addition, the size of the use portion 42 can be adjusted by a simple operation of sliding the stopper 5 along the elastic ring 4, so the operability is good. At this time, the stopper 5 fits into the small-diameter portion 45 of the elastic ring 4, and the large-diameter portion 44 serves as a resistance when the stopper 5 slips. Therefore, when pulling the needle 3 and attaching it to the anchor point, it is possible to prevent the stopper 5 from slipping along the elastic ring 4 unintentionally and the size of the use portion 42 from changing.

[0024] Note that the ring-shaped member according to the present invention is not limited to the above-described embodiment, and various modifications are possible. For example, the stopper does not necessarily have to be formed in a button shape, and may be formed in other shapes such as a clip shape. Further, the elastic ring does not necessarily have to have a large-diameter portion and a small-diameter portion, and may have a surface without irregularities.

Explanation of reference numerals

[0025] 10 Organ retractor 1 Ring-shaped member 2 Clip 3 Needle 4 Elastic ring 44 Large-diameter portion 45 Small-diameter portion 5 Stopper 52 Insertion hole 53 Contact portion O Organ W Abdominal wall (anchor point)

Claims

1. A ring-shaped member for use in an organ retractor, the ring-shaped member comprising a clip attached to an organ and a needle attached to an anchor point while pulling the organ via the clip, an elastic ring formed in an annular shape and interconnecting the clip and the needle; a stopper attached to the elastic ring for adjusting the distance between the clip and the needle.

2. The stopper has an insertion hole through which an end of the elastic ring is inserted, 2. The ring-shaped member according to claim 1, wherein the insertion hole is provided with a pair of contact portions that are in close contact with an outer periphery of the elastic ring.

3. The elastic ring has large diameter portions and small diameter portions alternately arranged along its circumference, 3. The ring-shaped member according to claim 2, wherein the contact portion is fitted into any one of the small diameter portions.

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