Medical suture needle and suture thread with medical suture needle

Abstract

To provide a medical suture needle that can facilitate purse string suture in a surgery.SOLUTION: A medical suture needle 10 is S-shaped in front view. The medical suture needle may be held by an appliance which has a rotation mechanism used in an abdominoscope surgery. The medical suture needle has a first curved part 13 positioned at on a tip end side, and a second curved part 14 positioned on a base end side. The first curved part may be longer than the second curved part. The medical suture needle may be configured such that a center angle defining the first curved part is 90 degrees or more and 180 degrees or lower, and a center angle defining the second curved part is 72 degrees or more and 135 degrees or lower.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a medical suture needle and a suture with a medical suture needle used for suturing in surgery. [Background technology]

[0002] In surgical procedures, purse string sutures are sometimes used to suture biological tissues. For example, purse string sutures are used to suture a resected intestine when anastomosis is performed using an automatic anastomosis device (see, for example, Patent Document 1).

[0003] In recent years, advances have been made in laparoscopic surgery using robots, in which an automatically controlled arm holds a suture needle or a needle holder and manipulates the suture needle to perform a purse-string suture.

[0004] The movement of purse string stitching is based on the movement of a straight stitch. Figure 8 shows an example of the sewing movement of a straight stitch. In a typical hand stitching movement, multiple objects 6 are bundled together with a sewing needle 5 and scooped up (pierced) all at once [Figures 8(a)-(d)]. The sewing needle 5 is then pierced all the objects 6 at once, and the suture thread 1 is passed through the objects 6 [Figures 8(e) and (f)]. In this sewing, it is necessary to use the wrist to continuously bend the direction of travel of the sewing needle 5 while sewing. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2012-205718 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, when performing purse string sutures in laparoscopic surgery, the instruments used in laparoscopic surgery, such as forceps, do not have a rotation mechanism, so it is not possible to perform a rotational movement equivalent to the wrist movement when performing hand-sewn purse string sutures. Therefore, it is difficult to perform suturing while continuously bending the direction of travel of the suture needle, and it has not been easy to perform purse string sutures in laparoscopic surgery.

[0007] Furthermore, when performing purse string suture in laparoscopic surgery using a robot, the arm has a rotation mechanism, so that a rotational movement equivalent to the movement of the wrist can be performed. However, as shown in FIG. 9, when using a conventional suture needle (round needle) 8, the amount of tissue 6 scooped up at once is small. Also, since the degree of bending (bending width) of the suture needle 8 in the advancing direction is large, it is difficult to continuously bend the advancing direction and perform suturing. As a result, it is not possible to perform purse string suture efficiently using the conventional suture needle (round needle) 8 in laparoscopic surgery using a robot. It is particularly difficult for an inexperienced doctor to perform purse string suture in laparoscopic surgery using a robot. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the medical suture needle according to the present invention is S-shaped when viewed from the front.

[0009] Furthermore, the medical suture needle according to the present invention may be held by an instrument having a rotation mechanism used in laparoscopic surgery.

[0010] In addition, the medical suture needle according to the present invention may comprise a first curved portion located on the tip side and a second curved portion located on the base end side, and the needle of the first curved portion may be longer than the needle of the second curved portion.

[0011] Furthermore, the medical suture needle according to the present invention may comprise a first curved portion located at the tip end and a second curved portion located at the base end, the first curved portion being defined by a central angle of 90 degrees or more and 180 degrees or less, and the second curved portion being defined by a central angle of 72 degrees or more and 135 degrees or less.

[0012] Furthermore, the medical suture needle according to the present invention may comprise a first curved portion located on the tip end side and a second curved portion located on the base end side, and a central angle defining the first curved portion may be greater than a central angle defining the second curved portion.

[0013] Furthermore, the medical suture needle according to the present invention may comprise a first curved portion located at the tip end and a second curved portion located at the base end, the first curved portion defining a central angle of 135 degrees and the second curved portion defining a central angle of 72 degrees or more and 135 degrees or less.

[0014] A suture with a medical suture needle according to the present invention may comprise the medical suture needle and a medical suture. Effect of the Invention

[0015] According to the present invention, a medical suture needle that can easily perform purse string suture can be provided. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a front view showing the configuration of a medical suture needle according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram for explaining the configuration of the medical suture needle according to the first embodiment of the present invention. [Diagram 3] FIG. 3 is a diagram for explaining the operation of the medical suture needle according to the first embodiment of the present invention. [Figure 4] FIG. 4 is a diagram for explaining the effect of the medical suture needle according to the first embodiment of the present invention. [Diagram 5] FIG. 5 is a diagram for explaining the effect of the medical suture needle according to the first embodiment of the present invention. [Figure 6] FIG. 6 is a schematic diagram showing an example of the configuration of a medical suture needle according to the first embodiment of the present invention. [Figure 7] FIG. 7 is a schematic diagram showing the configuration of a suture with a medical suture needle according to a second embodiment of the present invention. [Figure 8]FIG. 8 is a diagram for explaining the operation of a conventional medical suture needle. [Figure 9] FIG. 9 is a diagram for explaining the operation of a conventional medical suture needle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] <First embodiment> A medical suture needle according to a first embodiment of the present invention will be described with reference to Figs. 1 to 6.

[0018] <Configuration of medical suture needles> FIG. 1 shows a front view of a medical suture needle 10 according to the present embodiment.

[0019] A medical suturing needle 10 according to this embodiment is curved in an S-shape when viewed from the front, as shown in Figure 1. In detail, medical suturing needle 10 has a first curved portion 13 on the tip end 11 side and a second curved portion 14 on the base end 12 side.

[0020] The medical suture needle 10 has a sharp tip (needle tip) 11 and a base end 12 to which a suture thread (not shown) is attached.

[0021] There are no limitations on the cross-sectional shape of the main body, and a circular shape or a polygonal shape such as a triangle can be applied. Furthermore, the cross-sectional shape may be a shape that changes in the longitudinal direction of the medical suture needle 10.

[0022] The medical suture needle 10 is made of stainless steel, but may be made of other materials, such as polymers, alloys, or materials with suitable rigidity.

[0023] The main body has a tapered shape with a diameter decreasing toward the tip 11, and has a tapered shape within a range of about 1 mm from the tip 11.

[0024] The base end 12 is a portion for attaching a suture (not shown) and is provided with a resilient hole (spring hole). The resilient hole is a long, thin hole with a forked tip, and the suture is attached to the medical suture needle 10 by pressing the side of the suture against the fork and passing it through the hole. The base end 12 is not limited to a resilient hole (spring hole), and may be provided with a fluted hole (normal hole). Alternatively, a blind hole with a predetermined depth may be formed in the end face of the base end 12, and the suture may be inserted into the blind hole and the periphery of the base end 12 may be crimped to attach the suture to the medical suture needle 10.

[0025] The shape of medical suturing needle 10 as viewed from the front will be described in detail with reference to Fig. 2. Fig. 2 shows an example of the shape of the central axis of medical suturing needle 10. In the figure, the solid line indicates the central axis of medical suturing needle 10, and the dotted line indicates the arc that forms the curved portion.

[0026] Radius R A The arc A and the radius R tangent to the arc A B The first curved portion 13 is disposed at a central angle θ A The second curved portion 14 is formed of a circular arc A having a central angle θ B It is composed of arc B of the circle.

[0027] In the medical suture needle 10 according to the present embodiment, the radius of curvature R of the first curved portion 13 A and the radius of curvature R of the second curved portion 14 B Both shall be approximately 12.74 mm.

[0028] In addition, the central angle θ A The central angle θ corresponding to the second curved portion 14 is 135 degrees. B is 90 degrees.

[0029] As a result, the needle length of the first curved portion 13 is about 30 mm, and the needle length of the second curved portion 14 is about 20 mm.

[0030] <Operation of medical suture needle> An example of the operation of the medical suture needle 10 according to this embodiment will be described with reference to Fig. 3. Fig. 3 is a schematic diagram showing the operation of purse-string suturing of the intestinal tract using the medical suture needle 10 according to this embodiment.

[0031] First, the medical suture needle 10 is held by one of the forceps 2_1, and the tissue 3 at the end of the intestinal wall is grasped by the other forceps 2_2. Subsequently, the medical suture needle 10 is inserted into the tissue 3 of the intestinal wall and the tissue 3 is scooped up [Fig. 3(a)].

[0032] Next, the tissue 3 is bent with the other forceps 2_2, and while bundling the tissue 3 into multiple layers, it is scooped up with the medical suture needle 10. In this way, the multiple layers of tissue 3 are bundled and pierced by the medical suture needle 10 [FIGS. 3(b) and (c)].

[0033] Next, the medical suture needle 10 is pulled out from the bundled layers of tissue 3 all at once, and the suture thread 1 is passed through the bundled layers of tissue 3 all at once [Figure 3(d)].

[0034] Continuing the above-mentioned operations, the suture 1 is passed through the bundled layers of tissue 3 around the entire end (periphery) of the intestinal wall [Figure 3(e)].

[0035] Finally, the suture 1 is tightened at the end of the intestinal wall (the purse-string suture) and knotted to complete the purse-string suture [Figure 3(f)].

[0036] <Effects> The effects of the medical suture needle 10 according to this embodiment will be described with reference to FIGS.

[0037] The above-mentioned purse string stitching motion is based on the motion of a straight stitch. Figure 4 shows an example of a typical straight stitch sewing motion by hand. The arrow in the figure shows the direction of movement of the sewing needle.

[0038] In a typical hand-stitched straight stitch, first, a sewing needle 5 is used to scoop (pierce) an object 6 (such as cloth or biological tissue) [Figure 4(a)].

[0039] Next, the suture needle 5 continuously changes (bends) the direction of travel and further bends the object while bundling and scooping (piercing) the multiple layers of object 6 [Fig. 4(b)-(d)]. At this time, near the base end of the suture needle 5, the multiple layers of object 6 are bundled and scooped up while pinching and holding down (supporting) the ends of the multiple layers of object 6 with fingers (e.g. thumb and index finger) 7.

[0040] Finally, the suture needle 5 is pulled out from the multi-layered object 6, and the suture thread 1 is passed through the object 6 all at once [Figure 4(e)].

[0041] On the other hand, in suturing operations in laparoscopic surgery, of the two forceps that can be used, one holds the suture needle and the other grasps the tissue. Therefore, when suturing in the same way as a straight stitch by hand, there are not enough forceps to hold down the ends of the bundled tissue. As a result, since it is not possible to hold down the ends of the bundled tissue, it is difficult to bundle the tissue, pierce the suture needle, and pass the suture thread all at once, making it impossible to perform a straight stitch (purse string suture) efficiently.

[0042] In addition, when using a normal suture needle (round needle) for purse-string suture in laparoscopic surgery, the amount of tissue to be bundled and scooped (pierced) is small. Furthermore, after bundling and scooping, it is not easy to move on to the next action. As a result, it is difficult to continuously bend (change) the direction of the suture needle to scoop (pierce) the tissue.

[0043] Thus, in laparoscopic surgery, it is difficult to efficiently perform the above-mentioned purse-string suture based on the straight stitch using a conventional suture needle (round needle).

[0044] On the other hand, when using the medical suturing needle 10 according to this embodiment, as shown in FIG. 5, first, the medical suturing needle 10 scoops (pierces) the target object (such as intestinal tissue) 6 [FIG. 5(a)].

[0045] Next, the direction of travel of the medical suture needle 10 is continuously changed (bent) and the target object is further deflected while bundling and scooping (piercing) the multiple layers of the target object 6 [FIGS. 5(b) to (d)].

[0046] Finally, the medical suture needle 10 is pulled out from the multi-layered object 6, and the suture thread 1 is passed through the object 6 all at once [Figures 5(e) and (f)].

[0047] When using the medical suture needle 10, when bundling and scooping multiple layers of objects 6, the bundled objects (tissues) 6 can be held down (supported) by the convex part of the S-shaped second curved part 14 of the medical suture needle 10 [Fig. 5(d)]. This allows tissues to be bundled and pierced with the medical suture needle 10 to pass the suture thread through all at once in laparoscopic surgery, making it easy (efficient) to perform purse-string sutures based on straight stitches.

[0048] In addition, when using the medical suture needle 10, a large amount of tissue can be easily bundled and scooped up compared to a normal suture needle (round needle). Furthermore, compared to a normal suture needle (round needle), the medical suture needle 10 can easily scoop (pierce) while continuously changing (bending) its direction of travel. This allows for easy (efficient) purse-string sutures based on straight stitches.

[0049] Table 1 shows an example of the shape of the medical suture needle 10 according to this embodiment.

[0050] [Table 1]

[0051] The central angle of the first curved portion 13 of the medical suture needle 10 may be 90 degrees or more and 180 degrees or less. With regard to the curved shape of the first curved portion 13, a "strong curve" will result in a small amount of tissue to be bundled and pierced. Furthermore, with a "weak curve", the rotational motion cannot be fully utilized in the piercing action, and sufficient piercing ability cannot be obtained. Therefore, it is desirable that the curved shape of the first curved portion 13 be a "weak curve".

[0052] The central angle of the second curved portion 14 of the medical suture needle 10 may be 72 degrees or more and 135 degrees or less. With regard to the curved shape of the second curved portion 14, if it is a straight shape, it is difficult to pull out the suture needle from the tissue all at once after piercing the tissue bundled in a narrow space. With a "strong curve", the suture needle gets caught on the tissue when pulling out the suture needle all at once from the tissue, and it is not as easy to pull out the suture needle compared to suture needles of other curved shapes. Therefore, the curved shape of the second curved portion 14 is preferably a "weak curve", "very weak curve" or "very weak curve" because it can be easily pulled out from the tissue. Furthermore, a "very weak curve" is more preferable because it can be easily pulled out from the tissue.

[0053] From the above, in the S-shape of the medical suture needle according to this embodiment, it is desirable that the curved shape of the first curved portion is a "weak curve" and the curved shape of the second curved portion is a "weak curve", "very weak curve" or "very weak curve". Furthermore, it is more desirable that the curved shape of the first curved portion is a "weak curve" and the curved shape of the second curved portion is a "very weak curve".

[0054] In the S-shaped medical suture needle according to this embodiment, it is desirable that the needle of the first curved portion is longer than the needle of the second curved portion, and that the central angle defining the first curved portion is larger than the central angle defining the second curved portion.

[0055] Instruments used in normal laparoscopic surgery, such as forceps, do not have a rotation mechanism equivalent to a human wrist, and therefore cannot rotate and pierce a medical suture needle 10 having an S-shape, making it impossible to effectively use the medical suture needle in normal laparoscopic surgery.

[0056] On the other hand, in laparoscopic surgery using a robot, the robot arm has a rotation mechanism equivalent to a human wrist. Therefore, in laparoscopic surgery using a robot, the medical suture needle can be rotated and inserted, so that the S-shaped medical suture needle 10 can be effectively used in surgery in a narrow space.

[0057] Thus, the medical suture needle 10 according to the present embodiment provides a remarkable effect when held by an instrument having a rotation mechanism in laparoscopic surgery.

[0058] The medical suture needle according to the present embodiment makes it possible to easily (efficiently) perform purse-string suture based on a straight stitch.

[0059] In the present embodiment, the first curved portion and the second curved portion are on the same plane, but the present invention is not limited to this. As shown in Fig. 6, the plane including the first curved portion and the plane including the second curved portion may form a predetermined angle θ.

[0060] <Second embodiment> A suture with a medical suture needle according to a second embodiment of the present invention will be described with reference to FIG.

[0061] <Configuration of medical suture needle and suture thread> 7 shows a perspective view of a medical suture needle-attached suture 20 according to this embodiment. A medical suture needle-attached suture 20 according to this embodiment includes the medical suture needle 10 according to the first embodiment and a medical suture 21.

[0062] Medical suture needle 10 comprises a body, a tip 11, and a base end 12. Medical suture thread 21 is inserted into a blind hole provided in base end 12 and attached to medical suture needle 10 by crimping the periphery of base end 12. Medical suture thread 21 may be attached to medical suture needle 10 by heat treatment, adhesive, or the like.

[0063] The material of the medical suture 21 is nylon and is a monofilament (single thread), and the diameter is 0.05 mm. The material of the medical suture 21 is not limited to this, and it may be polyester, silk, or braid (knitted thread). The diameter may be 0.001 mm to 0.8 mm. Furthermore, the medical suture 21 may be a synthetic absorbable thread, and the material may be monofilament or braid.

[0064] The suture thread with medical suture needle according to this embodiment provides the same effects in suturing as the first embodiment.

[0065] The medical suture needle in the embodiment of the present invention may be a round needle with a conical tip, a square needle with a triangular pyramid tip (the inside of the curve is sharp), an inverted triangular needle with a triangular pyramid tip (the outside of the curve is sharp), a taper cut needle with a cylindrical shape and only the tip being triangular pyramid, or a blunt needle that is a round needle with a slightly rounded and blunt tip, etc. The tip may also be an inverted angle needle with an inverted triangular cross section, or a spatula-shaped inverted angle needle with the tip (apex) removed.

[0066] The length of the medical suture needle in the embodiment according to the present invention is about 50 mm, but is not limited to this. The length of the medical suture needle may be 70 mm, or may be 10 mm to 100 mm. The needle diameter may be in the range of 50 μm to 1.5 mm.

[0067] The medical suture needle according to the embodiment of the present invention is manufactured by a normal manufacturing method. For example, after cutting the stainless steel material to a predetermined length, a hole for the suture thread is formed. Next, the tip and main body (body) are processed, including the formation of a curved portion, polished, and then sterilized.

[0068] In the embodiment of the present invention, an example has been shown in which the curved shapes of the first curved portion and the second curved portion have the same radius of curvature, but this is not limited thereto, and the curved shapes of the first curved portion and the second curved portion may have different radii of curvature.

[0069] In the embodiment of the present invention, an example has been shown in which the medical suture needle according to the embodiment of the present invention is applied to purse-string suturing of the intestinal tract, but the present invention is not limited to this. It may be applied to purse-string suturing of other organs such as the esophagus, or to other sutures besides purse-string suturing.

[0070] In the embodiment of the present invention, examples of the structure, dimensions, materials, etc. of each component part in the configuration and manufacturing method of the medical suture needle are shown, but the present invention is not limited to these. Anything that can exert the function and effect of the medical suture needle may be used. [Industrial Applicability]

[0071] The present invention relates to a medical suture needle for use in surgical operations, and can be applied to medical equipment for use in laparoscopic surgery. [Explanation of symbols]

[0072] 10 Medical suture needles

Claims

1. A medical suture needle that is S-shaped when viewed from the front.

2. 2. The medical suture needle according to claim 1, which is held by an instrument having a rotation mechanism used in laparoscopic surgery.

3. A first curved portion disposed on the distal end side; A second curved portion disposed on the base end side; Equipped with 3. The medical suture needle according to claim 1 or 2, wherein the needle of the first curved portion is longer than the needle of the second curved portion.

4. A first curved portion disposed on the distal end side; A second curved portion disposed on the base end side; Equipped with A central angle defining the first curved portion is equal to or greater than 90 degrees and equal to or less than 180 degrees, 3. The medical suture needle according to claim 1, wherein a central angle defining the second curved portion is equal to or greater than 72 degrees and equal to or less than 135 degrees.

5. A first curved portion disposed on the distal end side; A second curved portion disposed on the base end side; Equipped with 3. The medical suture needle according to claim 1, wherein a central angle defining the first curved portion is larger than a central angle defining the second curved portion.

6. A first curved portion disposed on the distal end side; A second curved portion disposed on the base end side; Equipped with The central angle defining the first curved portion is 135 degrees, 3. The medical suture needle according to claim 1, wherein a central angle defining the second curved portion is equal to or greater than 72 degrees and equal to or less than 135 degrees.

7. The medical suture needle according to claim 1 or 2, Medical sutures and A suture with a medical suture needle comprising:

Images