WO2017122319A1 - Surgical staple - Google Patents

Surgical staple Download PDF

Info

Publication number
WO2017122319A1
WO2017122319A1 PCT/JP2016/050960 JP2016050960W WO2017122319A1 WO 2017122319 A1 WO2017122319 A1 WO 2017122319A1 JP 2016050960 W JP2016050960 W JP 2016050960W WO 2017122319 A1 WO2017122319 A1 WO 2017122319A1
Authority
WO
WIPO (PCT)
Prior art keywords
surgical staple
outer side
needle tip
anvil
base
Prior art date
Application number
PCT/JP2016/050960
Other languages
French (fr)
Japanese (ja)
Inventor
岡部 洋
契介 釣本
熊田 嘉之
Original Assignee
オリンパス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by オリンパス株式会社 filed Critical オリンパス株式会社
Priority to JP2017561461A priority Critical patent/JP6701233B2/en
Priority to PCT/JP2016/050960 priority patent/WO2017122319A1/en
Publication of WO2017122319A1 publication Critical patent/WO2017122319A1/en

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/064Surgical staples, i.e. penetrating the tissue
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/08Wound clamps or clips, i.e. not or only partly penetrating the tissue ; Devices for bringing together the edges of a wound

Definitions

  • the present invention relates to a surgical staple.
  • a staple used as a needle for a stapler has a long base portion and a needle-like insertion portion that protrudes from one end of the base portion in a direction intersecting the longitudinal direction of the base portion.
  • the staple insertion portion disclosed in Patent Document 1 is greatly curved so that the distal end of the insertion portion is located at substantially the same position as the other end of the base portion in the longitudinal direction of the base portion.
  • Patent Document 1 Although the insertion part of Patent Document 1 is easily deformed by an anvil, there is a problem that it is difficult to puncture a living tissue because the distal end of the insertion part faces a direction substantially parallel to the longitudinal direction of the base part. .
  • the present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a surgical staple that can easily deform an insertion portion and reliably puncture a living tissue.
  • One aspect of the present invention is a surgical staple which is used in a surgical stapler having an anvil and a cartridge, and is pushed toward the anvil from the inside of the cartridge and is subjected to a pressing force in a predetermined direction by contact with the anvil.
  • An elongated base portion having one end portion and the other end portion, and an insertion portion projecting from the one end portion of the base portion in a direction intersecting the longitudinal direction of the base portion and deformable by the pressing force And the insertion portion is formed by an inner side surface located on the other end side, an outer side surface located on the opposite side of the other end portion, and the inner side surface and the outer side surface at the tip.
  • a surgical staple having a shape that satisfies the following conditional expression (1).
  • (theta) 1 is the angle which the tangent of the direction along the plane demarcated by the base part and the insertion part in the needle point part of the outside side and the predetermined direction makes, and theta 2 It is an angle formed by a tangent in a direction along the plane at the needle tip portion of the inner side surface and the predetermined direction.
  • the insertion portion can be easily deformed and the living tissue can be reliably punctured.
  • (A), (b), (c) It is a figure which shows the process in which the surgical staple which concerns on one Embodiment of this invention is deform
  • the surgical stapler is an instrument for suturing the living tissue S with the surgical staple 1, and includes a cartridge 11 and an anvil 12 interconnected so as to be openable and closable. It has.
  • the cartridge 11 and the anvil 12 have inner surfaces 11a and 12a facing each other in parallel in the closed state, and the living tissue S is held between the inner surface 11a and the inner surface 12a.
  • a slot 11b is opened in the inner surface 11a of the cartridge 11.
  • the surgical staple 1 is accommodated in the slot 11b and is pushed out of the slot 11b by the operation of an unillustrated push-out mechanism.
  • the surgical staple 1 pushed out from the inside of the slot 11b penetrates the living tissue S and then contacts the inner surface 12a of the anvil 12 as shown in FIG.
  • a pressing force F in a predetermined direction corresponding to the force applied to the surgical staple 1 from the pushing mechanism is applied to the surgical staple 1 that contacts the inner surface 12a of the anvil 12.
  • FIGS. 1B and 1C the surgical staple 1 is deformed by the pressing force F, and the living tissue S is sutured.
  • the surgical staple 1 is substantially L-shaped and includes a long base portion 2 and a single insertion portion 3 extending from one end of the base portion 2.
  • the substantially L-shape means a shape in which the insertion portion 3 extends from one end of the base portion 2 in a direction intersecting the longitudinal direction of the base portion 2.
  • the base portion 2 and the insertion portion 3 are made of a metal having high biocompatibility such as titanium alloy and stainless steel.
  • the base 2 has a first end (one end) 2a and a second end (other end) 2b at both ends in the longitudinal direction.
  • the insertion portion 3 is a portion that penetrates the living tissue S and is curved and deformed by the anvil 12.
  • the insertion portion 3 is connected to the first end portion 2a of the base portion 2 at one end, and protrudes from the first end portion 2a in a direction intersecting the longitudinal direction of the base portion 2.
  • the insertion portion 3 has an arc shape that is convex on the opposite side to the base portion 2.
  • the shape of the insertion portion 3 is not limited to an arc shape having a constant curvature, and may be an arc shape in which the curvature changes between one end and the other end.
  • the longitudinal direction of the base portion 2 is the X direction
  • the direction perpendicular to the longitudinal direction of the base portion 2 along the plane defined by the base portion 2 and the insertion portion 3 is the Z direction
  • the insertion portion 3 includes an inner side surface 5 located on the radially inner side (second end 2b side) of the arc shape, and an outer side surface 6 located on the radially outer side (opposite side to the second end portion 2b). ,have.
  • the other end (tip) of the insertion portion 3 is provided with a needle tip portion 4 formed of a corner portion formed by connecting the edge of the inner side surface 5 and the edge of the outer side surface 6.
  • the needle tip portion 4 is located closer to the second end portion 2b than the first end portion 2a in the longitudinal direction of the base portion 2, and preferably between the first end portion 2a and the second end portion 2b. Located between.
  • the inner side surface 5 and the outer side surface 6 satisfy the following conditional expression (1) when the first angle ⁇ 1 and the second angle ⁇ 2 are satisfied. It has such a shape. (1) 60 °> ⁇ 1> ⁇ 2> 0 °
  • the first angle ⁇ 1 is an angle formed by the tangent line T1 in the direction along the XZ plane in the needle tip portion 4 of the outer side surface 6 and the direction of the pressing force F.
  • the second angle ⁇ 2 is an angle formed by the tangent line T2 along the XZ plane in the needle tip portion 4 of the inner side surface 5 and the direction of the pressing force F. More preferably, the first angle ⁇ 1 is 38 ° ⁇ 2 °.
  • the surgical staple 1 is pushed out from the slot 11b in the Z direction perpendicular to the longitudinal direction of the base portion 2, and the direction of the pressing force F is the Z direction. Accordingly, the first angle ⁇ 1 is equal to the angle formed by the tangent line T1 and the Z direction, and the second angle ⁇ 2 is equal to the angle formed by the tangent line T2 and the Z direction.
  • the length dimension L3 in the direction of the pressing force F of the insertion part 3 is larger than the length dimension L2 of the base part 2 in the X direction. Thereby, the insertion portion 3 is more easily deformed by the pressing force F.
  • the surface roughness R1 of the outer side surface 6 and the surface roughness R2 of the inner side surface 5 satisfy the following conditional expression (2).
  • (2) R1 ⁇ R2 By making the surface roughness R1 smaller than the surface roughness R2 as described above, the deformation of the insertion portion 3 by the anvil 12 and the stability of the insertion portion 3 with respect to the biological tissue S after puncturing the biological tissue S are performed. And both can be achieved.
  • the contact position between the outer side surface 6 and the anvil 12 is the root portion 7 that is the end portion of the insertion portion 3 opposite to the needle tip portion 4 from the needle tip portion 4. Move towards. Therefore, in order to make deformation of the insertion portion 3 by the anvil 12 easier, the friction between the outer side surface 6 and the anvil 12 is preferably small, and the surface roughness R1 of the outer side surface 6 is preferably smaller. . In order to reduce the surface roughness R1, the outer side surface 6 may be subjected to mechanical processing such as mirror polishing or surface processing such as coating.
  • the insertion portion 3 is formed so as to gradually become thicker from the needle tip portion 4 toward the root portion 7. Thereby, the cross-sectional secondary moment around the axis in the Y direction at each position between the base portion 2 and the insertion portion 3 of the insertion portion 3 continuously increases from the needle tip portion 4 toward the root portion 7. Yes. Therefore, in the process of deformation by the anvil 12, the insertion portion 3 is deformed in order from the needle tip portion 4 toward the root portion 7.
  • the surgical staple 1 is accommodated in the slot 11b with the needle tip 4 facing the anvil 12, and the base portion 2 is supported in the slot 11b so as to be parallel to the inner surface 11a.
  • the surgical staple 1 is pushed out of the slot 11b in a direction perpendicular to the inner surfaces 11a and 12a by the operation of an unillustrated push-out mechanism.
  • the insertion part 3 begins to bend by the pressing force F of the Z direction which goes to the base part 2 acting on the needle tip part 4 which contacts the inner surface 12a of the anvil 12.
  • the contact position of the insertion portion 3 with the inner surface 12a of the anvil 12, that is, the position where the pressing force F acts is the needle along the outer side surface 6 of the insertion portion 3. It moves from the front part 4 toward the root part 7.
  • the insertion portion 3 since the insertion portion 3 has a cross-sectional secondary moment that gradually increases from the needle tip portion 4 toward the root portion 7, the insertion portion 3 has a main deformation portion from a portion having a small cross-sectional secondary moment. The plastic deformation occurs while changing to a portion where the moment of inertia of the section is large.
  • An anvil pocket for bending the insertion portion 3 into a C shape is formed at a position facing the slot 11b of the inner surface 12a of the anvil 12. Accordingly, as shown in FIGS. 1B and 1C, the insertion portion 3 is deformed into a C shape and penetrates the living tissue S again from the anvil 12 side. Thereby, the biological tissue S can be stably sutured at two locations.
  • the inner side surface 5 is punctured with the living tissue S.
  • the living tissue S is contacted at an angle close to perpendicular to the surface of the living tissue S on the inner surface 11a.
  • the angle formed by the inner side surface 5 and the outer side surface 6 in the needle tip portion 4 is an acute angle, and the sharpness A sharp needle tip 4 is formed.
  • the angle at the tip of a tool such as a drill for penetration is about 120 °.
  • the outer side surface 6 contacts the inner surface 12a at an angle when the needle tip portion 4 contacts the inner surface 12a of the anvil 12. Therefore, a bending moment that causes the insertion portion 3 to bend and deform is generated in the insertion portion 3 by the pressing force F.
  • the insertion part 3 can be bend-deformed easily.
  • the bending moment that acts on the needle tip portion 4 when the needle tip portion 4 serving as the point of application of the pressing force F is located at a position shifted to the second end portion 2b side from the root portion 7 serving as the fulcrum. Becomes larger.
  • the bending deformation of the insertion part 3 can be made still easier.
  • the first angle ⁇ 1 is 38 ° ⁇ 2 °, both the ease of puncture of the needle tip portion 4 into the living tissue S and the ease of deformation of the insertion portion 3 by the anvil 12, High effect can be obtained.
  • a barb 8 may be provided on the inner side surface 5 of the insertion portion 3.
  • the barb 8 is formed to stop the movement of the living tissue S relative to the insertion part 3 in the direction from the needle tip part 4 toward the root part 7. Thereby, it can prevent more reliably that the insertion part 3 slips out from the biological tissue S.
  • the surgical staple 1 is provided with the single insertion portion 3, but instead, it is provided with a space in the longitudinal direction of the base portion 2 as shown in FIG. A plurality of inserted portions 3 may be provided. By doing so, the living tissue S can be sutured more efficiently.
  • the length dimension L3 of the insertion part 3 is designed so that the sum of the length dimensions L3 of the plurality of insertion parts 3 is larger than the length dimension L2 of the base part 2.
  • the direction of the pressing force F acting on the insertion portion 3 is a direction perpendicular to the longitudinal direction of the base portion 2, but the direction of the pressing force F is not limited to this.
  • the cartridge 11 and the anvil 12 can be changed as appropriate according to the design. Therefore, the shapes of the inner side surface 5 and the outer side surface 6 are appropriately designed according to the direction of the pressing force F.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

A surgical staple (1) is provided with: a base (2) having one end (2a) and the other end (2b); and an insertion section (3) which protrudes from the one end (2a) in the direction intersecting the longitudinal direction of the base (2) and which is subjected to pressing force (F) caused by the contact of the stapler with an anvil and acting in a predetermined direction. The insertion section (3) has: an inner side surface (5) located on the other end side; an outer side surface (6) located on the side opposite the other end; and a needle point (4) formed at the front end of the insertion section (3) by the inner side surface (5) and the outer side surface (6). The outer side surface (6) and the inner side surface (5) are shaped so that angles (θ1, θ2) formed at the needle point (4) between the predetermined direction and the lines (T1, T2) which are respectively tangent to the outer side surface (6) and the inner side surface (5) satisfy the following conditional expression (1). (1) 60º > θ1 > θ2 > 0º

Description

外科用ステープルSurgical staples
 本発明は、外科用ステープルに関するものである。 The present invention relates to a surgical staple.
 従来、生体組織を縫合するためにステープラが用いられている(例えば、特許文献1参照。)。ステープラに針として用いられるステープルは、長尺形状のベース部と、該ベース部の一端からベース部の長手方向に交差する方向に突出する針状の挿入部とを有している。特許文献1に開示されているステープルの挿入部は、該挿入部の先端がベース部の長手方向においてベース部の他端と略同一の位置に位置するように、大きく湾曲している。 Conventionally, a stapler has been used to suture a living tissue (for example, see Patent Document 1). A staple used as a needle for a stapler has a long base portion and a needle-like insertion portion that protrudes from one end of the base portion in a direction intersecting the longitudinal direction of the base portion. The staple insertion portion disclosed in Patent Document 1 is greatly curved so that the distal end of the insertion portion is located at substantially the same position as the other end of the base portion in the longitudinal direction of the base portion.
米国特許第8662369号明細書US Pat. No. 8,662,369
 しかしながら、特許文献1の挿入部は、アンビルによる変形は容易であるが、挿入部の先端がベース部の長手方向に略平行な方向を向いているため、生体組織に穿刺し難いという問題がある。
 本発明は、上述した事情に鑑みてなされたものであって、挿入部を容易に変形させ、かつ、生体組織に確実に穿刺することができる外科用ステープルを提供することを目的とする。
However, although the insertion part of Patent Document 1 is easily deformed by an anvil, there is a problem that it is difficult to puncture a living tissue because the distal end of the insertion part faces a direction substantially parallel to the longitudinal direction of the base part. .
The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a surgical staple that can easily deform an insertion portion and reliably puncture a living tissue.
 本発明の一態様は、アンビルおよびカートリッジを有する外科用ステープラに使用され、前記カートリッジ内から前記アンビルに向かって押し出されて前記アンビルとの接触によって所定の方向の押圧力が作用する外科用ステープルであって、一端部と他端部とを有する長尺形状のベース部と、該ベース部の前記一端部から前記ベース部の長手方向に交差する方向に突出し、前記押圧力によって変形可能な挿入部と、備え、前記挿入部が、前記他端部側に位置する内側側面と、前記他端部とは反対側に位置する外側側面と、先端において前記内側側面と前記外側側面とによって形成される角部からなる針先部と、を有し、前記外側側面および前記内側側面が、下記条件式(1)を満足する形状を有する外科用ステープルである。
 (1)    60°>θ1>θ2>0°
 ただし、θ1は、前記外側側面の、前記針先部における前記ベース部と前記挿入部とによって画定される平面に沿う方向の接線と、前記所定の方向と、が成す角度であり、θ2は、前記内側側面の前記針先部における前記平面に沿う方向の接線と、前記所定の方向と、が成す角度である。
One aspect of the present invention is a surgical staple which is used in a surgical stapler having an anvil and a cartridge, and is pushed toward the anvil from the inside of the cartridge and is subjected to a pressing force in a predetermined direction by contact with the anvil. An elongated base portion having one end portion and the other end portion, and an insertion portion projecting from the one end portion of the base portion in a direction intersecting the longitudinal direction of the base portion and deformable by the pressing force And the insertion portion is formed by an inner side surface located on the other end side, an outer side surface located on the opposite side of the other end portion, and the inner side surface and the outer side surface at the tip. A surgical staple having a shape that satisfies the following conditional expression (1).
(1) 60 °>θ1>θ2> 0 °
However, (theta) 1 is the angle which the tangent of the direction along the plane demarcated by the base part and the insertion part in the needle point part of the outside side and the predetermined direction makes, and theta 2 It is an angle formed by a tangent in a direction along the plane at the needle tip portion of the inner side surface and the predetermined direction.
 本発明によれば、挿入部を容易に変形させ、かつ、生体組織に確実に穿刺することができるという効果を奏する。 According to the present invention, there is an effect that the insertion portion can be easily deformed and the living tissue can be reliably punctured.
(a),(b),(c)本発明の一実施形態に係る外科用ステープルが外科用ステープラによって変形される過程を示す図である。(A), (b), (c) It is a figure which shows the process in which the surgical staple which concerns on one Embodiment of this invention is deform | transformed by the surgical stapler. 本発明の一実施形態に係る外科用ステープルの全体構成を示す正面図である。It is a front view showing the whole surgical staple composition concerning one embodiment of the present invention. 図2の外科用ステープルの第1の変形例の全体構成を示す正面図である。It is a front view which shows the whole structure of the 1st modification of the surgical staple of FIG. 図2の外科用ステープルの第2の変形例の全体構成を示す正面図である。It is a front view which shows the whole structure of the 2nd modification of the surgical staple of FIG.
 以下に、本発明の一実施形態に係る外科用ステープル1について図面を参照して説明する。
 まず、本実施形態に係る外科用ステープル1が使用される外科用ステープラについて説明する。
 外科用ステープラは、図1(a)~(c)に示されるように、外科用ステープル1によって生体組織Sを縫合するための器具であり、開閉可能に相互に連結されたカートリッジ11およびアンビル12を備えている。カートリッジ11およびアンビル12は、閉状態において互いに平行に対向する内面11a,12aを有し、内面11aと内面12aとの間に生体組織Sが把持される。
Below, the surgical staple 1 which concerns on one Embodiment of this invention is demonstrated with reference to drawings.
First, a surgical stapler in which the surgical staple 1 according to this embodiment is used will be described.
As shown in FIGS. 1 (a) to 1 (c), the surgical stapler is an instrument for suturing the living tissue S with the surgical staple 1, and includes a cartridge 11 and an anvil 12 interconnected so as to be openable and closable. It has. The cartridge 11 and the anvil 12 have inner surfaces 11a and 12a facing each other in parallel in the closed state, and the living tissue S is held between the inner surface 11a and the inner surface 12a.
 カートリッジ11の内面11aにはスロット11bが開口している。外科用ステープル1は、スロット11b内に収容され、図示しない押出機構の作動によってスロット11b内から押し出されるようになっている。スロット11b内から押し出された外科用ステープル1は、生体組織Sを貫通した後に、図1(a)に示されるように、アンビル12の内面12aに接触する。このときに、アンビル12の内面12aに接触する外科用ステープル1には、押出機構から外科用ステープル1に与えられる力に応じた所定の方向の押圧力Fが作用する。この押圧力Fによって、図1(b),(c)に示されるように、外科用ステープル1が変形し、生体組織Sが縫合されるようになっている。 A slot 11b is opened in the inner surface 11a of the cartridge 11. The surgical staple 1 is accommodated in the slot 11b and is pushed out of the slot 11b by the operation of an unillustrated push-out mechanism. The surgical staple 1 pushed out from the inside of the slot 11b penetrates the living tissue S and then contacts the inner surface 12a of the anvil 12 as shown in FIG. At this time, a pressing force F in a predetermined direction corresponding to the force applied to the surgical staple 1 from the pushing mechanism is applied to the surgical staple 1 that contacts the inner surface 12a of the anvil 12. As shown in FIGS. 1B and 1C, the surgical staple 1 is deformed by the pressing force F, and the living tissue S is sutured.
 次に、本実施形態に係る外科用ステープル1について説明する。
 外科用ステープル1は、図2に示されるように、略L字型であり、長尺形状のベース部2と、該ベース部2の一端から延びる単一の挿入部3と、を備えている。略L字型とは、ベース部2の一端から該ベース部2の長手方向に交差する方向に挿入部3が延びる形状を意味する。
 ベース部2および挿入部3は、チタン合金やステンレス等の生体親和性の高い金属から形成されている。
Next, the surgical staple 1 according to this embodiment will be described.
As shown in FIG. 2, the surgical staple 1 is substantially L-shaped and includes a long base portion 2 and a single insertion portion 3 extending from one end of the base portion 2. . The substantially L-shape means a shape in which the insertion portion 3 extends from one end of the base portion 2 in a direction intersecting the longitudinal direction of the base portion 2.
The base portion 2 and the insertion portion 3 are made of a metal having high biocompatibility such as titanium alloy and stainless steel.
 ベース部2は、長手方向の両端に第1の端部(一端部)2aおよび第2の端部(他端部)2bを有している。
 挿入部3は、生体組織Sを貫通し、アンビル12によって湾曲変形される部分である。挿入部3は、一端においてベース部2の第1の端部2aと連結され、該第1の端部2aからベース部2の長手方向に交差する方向に突出している。挿入部3は、ベース部2とは反対側に凸となる円弧形状を有している。挿入部3の形状は、一定の曲率を有する円弧形状に限らず、一端と他端との間で曲率が変化する円弧形状であってもよい。
The base 2 has a first end (one end) 2a and a second end (other end) 2b at both ends in the longitudinal direction.
The insertion portion 3 is a portion that penetrates the living tissue S and is curved and deformed by the anvil 12. The insertion portion 3 is connected to the first end portion 2a of the base portion 2 at one end, and protrudes from the first end portion 2a in a direction intersecting the longitudinal direction of the base portion 2. The insertion portion 3 has an arc shape that is convex on the opposite side to the base portion 2. The shape of the insertion portion 3 is not limited to an arc shape having a constant curvature, and may be an arc shape in which the curvature changes between one end and the other end.
 以下、ベース部2の長手方向をX方向、ベース部2と挿入部3とによって画定される平面(図2において紙面と同一面)に沿いベース部2の長手方向に垂直な方向をZ方向、前記平面(XZ平面)に垂直な方向をY方向とするXYZ直交座標系を用いて説明する。 Hereinafter, the longitudinal direction of the base portion 2 is the X direction, the direction perpendicular to the longitudinal direction of the base portion 2 along the plane defined by the base portion 2 and the insertion portion 3 (the same plane as the paper surface in FIG. 2) is the Z direction, Description will be made using an XYZ orthogonal coordinate system in which the direction perpendicular to the plane (XZ plane) is the Y direction.
 挿入部3は、円弧形状の径方向内側(第2の端部2b側)に位置する内側側面5と、径方向外側(第2の端部2bとは反対側)に位置する外側側面6と、を有している。挿入部3の他端(先端)には、内側側面5の縁と外側側面6の縁とが接続することによって形成された角部からなる針先部4が設けられている。針先部4は、ベース部2の長手方向において、第1の端部2aよりも第2の端部2b側に位置し、好ましくは第1の端部2aと第2の端部2bとの間に位置している。 The insertion portion 3 includes an inner side surface 5 located on the radially inner side (second end 2b side) of the arc shape, and an outer side surface 6 located on the radially outer side (opposite side to the second end portion 2b). ,have. The other end (tip) of the insertion portion 3 is provided with a needle tip portion 4 formed of a corner portion formed by connecting the edge of the inner side surface 5 and the edge of the outer side surface 6. The needle tip portion 4 is located closer to the second end portion 2b than the first end portion 2a in the longitudinal direction of the base portion 2, and preferably between the first end portion 2a and the second end portion 2b. Located between.
 内側側面5および外側側面6は、図2に示されるように、Y方向に外科用ステープル1を見たときに、第1の角度θ1および第2の角度θ2が下記条件式(1)を満足するような形状を有している。
 (1)    60°>θ1>θ2>0°
As shown in FIG. 2, when the surgical staple 1 is viewed in the Y direction, the inner side surface 5 and the outer side surface 6 satisfy the following conditional expression (1) when the first angle θ1 and the second angle θ2 are satisfied. It has such a shape.
(1) 60 °>θ1>θ2> 0 °
 式(1)において、第1の角度θ1は、外側側面6の針先部4におけるXZ平面に沿う方向の接線T1と、押圧力Fの方向と、が成す角度である。第2の角度θ2は、内側側面5の針先部4におけるXZ平面に沿う方向の接線T2と、押圧力Fの方向と、が成す角度である。
 第1の角度θ1は、38°±2°であることがさらに好ましい。このようにすることで、生体組織Sに対する針先部4の穿刺性能を高め、かつ、アンビル12による挿入部3の変形を容易にすることができる。
In the formula (1), the first angle θ1 is an angle formed by the tangent line T1 in the direction along the XZ plane in the needle tip portion 4 of the outer side surface 6 and the direction of the pressing force F. The second angle θ2 is an angle formed by the tangent line T2 along the XZ plane in the needle tip portion 4 of the inner side surface 5 and the direction of the pressing force F.
More preferably, the first angle θ1 is 38 ° ± 2 °. By doing in this way, the puncture performance of the needle tip part 4 with respect to the biological tissue S can be improved, and the deformation of the insertion part 3 by the anvil 12 can be facilitated.
 本実施形態においては、外科用ステープル1がスロット11b内からベース部2の長手方向に垂直なZ方向に押し出され、押圧力Fの方向がZ方向である場合を想定している。したがって、第1の角度θ1は、接線T1とZ方向とが成す角度に等しく、第2の角度θ2は、接線T2とZ方向とが成す角度に等しい。 In the present embodiment, it is assumed that the surgical staple 1 is pushed out from the slot 11b in the Z direction perpendicular to the longitudinal direction of the base portion 2, and the direction of the pressing force F is the Z direction. Accordingly, the first angle θ1 is equal to the angle formed by the tangent line T1 and the Z direction, and the second angle θ2 is equal to the angle formed by the tangent line T2 and the Z direction.
 挿入部3の押圧力Fの方向における長さ寸法L3は、X方向におけるベース部2の長さ寸法L2よりも大きくなっている。これにより、押圧力Fによって挿入部3がより容易に変形するようになっている。 The length dimension L3 in the direction of the pressing force F of the insertion part 3 is larger than the length dimension L2 of the base part 2 in the X direction. Thereby, the insertion portion 3 is more easily deformed by the pressing force F.
 外側側面6の表面粗さR1および内側側面5の表面粗さR2は、下記条件式(2)を満足している。
 (2)    R1<R2
 上記のように表面粗さR1を表面粗さR2よりも小さくすることで、アンビル12による挿入部3の変形し易さと、生体組織Sに穿刺した後の生体組織Sに対する挿入部3の安定性との両方を達成することができる。
The surface roughness R1 of the outer side surface 6 and the surface roughness R2 of the inner side surface 5 satisfy the following conditional expression (2).
(2) R1 <R2
By making the surface roughness R1 smaller than the surface roughness R2 as described above, the deformation of the insertion portion 3 by the anvil 12 and the stability of the insertion portion 3 with respect to the biological tissue S after puncturing the biological tissue S are performed. And both can be achieved.
 アンビル12による挿入部3の変形の過程において、外側側面6とアンビル12との接触位置は、針先部4から、挿入部3の針先部4とは反対側の端部である根元部7に向かって移動する。したがって、アンビル12による挿入部3の変形をより容易にするためには、外側側面6とアンビル12との間の摩擦が小さいことが好ましく、外側側面6の表面粗さR1がより小さいことが好ましい。表面粗さR1を低減するために、外側側面6は、鏡面研磨等の機械加工や、コーティング等の表面加工が施されていてもよい。 In the process of deformation of the insertion portion 3 by the anvil 12, the contact position between the outer side surface 6 and the anvil 12 is the root portion 7 that is the end portion of the insertion portion 3 opposite to the needle tip portion 4 from the needle tip portion 4. Move towards. Therefore, in order to make deformation of the insertion portion 3 by the anvil 12 easier, the friction between the outer side surface 6 and the anvil 12 is preferably small, and the surface roughness R1 of the outer side surface 6 is preferably smaller. . In order to reduce the surface roughness R1, the outer side surface 6 may be subjected to mechanical processing such as mirror polishing or surface processing such as coating.
 一方、生体組織Sに穿刺した後に挿入部3の生体組織Sからの抜けを防止して生体組織Sに対する挿入部3の安定性を高めるためには、挿入部3と生体組織Sとの間の摩擦が大きいことが好ましい。したがって、内側側面5の表面粗さR2がより大きいことが好ましい。 On the other hand, in order to prevent the insertion part 3 from coming out of the biological tissue S after puncturing the biological tissue S and to improve the stability of the insertion part 3 with respect to the biological tissue S, between the insertion part 3 and the biological tissue S. It is preferable that the friction is large. Therefore, it is preferable that the surface roughness R2 of the inner side surface 5 is larger.
 挿入部3は、針先部4から根元部7に向かってしだいに太くなるように形成されている。これにより、挿入部3のベース部2と挿入部3との間の各位置におけるY方向の軸回りの断面2次モーメントは、針先部4から根元部7に向かって連続的に大きくなっている。したがって、アンビル12による変形の過程において、挿入部3が、針先部4から根元部7に向かって順番に変形するようになっている。 The insertion portion 3 is formed so as to gradually become thicker from the needle tip portion 4 toward the root portion 7. Thereby, the cross-sectional secondary moment around the axis in the Y direction at each position between the base portion 2 and the insertion portion 3 of the insertion portion 3 continuously increases from the needle tip portion 4 toward the root portion 7. Yes. Therefore, in the process of deformation by the anvil 12, the insertion portion 3 is deformed in order from the needle tip portion 4 toward the root portion 7.
 次に、このように構成された外科用ステープル1の作用について説明する。
 外科用ステープル1は、アンビル12に針先部4を向けてスロット11b内に収容され、スロット11b内において、ベース部2が内面11aと平行になるよう支持される。これにより、外科用ステープル1は、図示しない押出機構の作動によって、内面11a,12aに垂直な方向にスロット11b内から押し出されるようになっている。
Next, the operation of the surgical staple 1 thus configured will be described.
The surgical staple 1 is accommodated in the slot 11b with the needle tip 4 facing the anvil 12, and the base portion 2 is supported in the slot 11b so as to be parallel to the inner surface 11a. As a result, the surgical staple 1 is pushed out of the slot 11b in a direction perpendicular to the inner surfaces 11a and 12a by the operation of an unillustrated push-out mechanism.
 スロット11b内から押し出された挿入部3は、針先部4によって生体組織Sを穿刺して、カートリッジ11側から生体組織Sを貫通し、その後、図1(a)に示されるように、針先部4においてアンビル12の内面12aに接触する。そして、アンビル12の内面12aと接触する針先部4に、ベース部2に向かうZ方向の押圧力Fが作用することによって、挿入部3は折れ曲がり始める。 The insertion portion 3 pushed out from the inside of the slot 11b punctures the living tissue S by the needle tip portion 4 and penetrates the living tissue S from the cartridge 11 side, and then, as shown in FIG. The tip 4 contacts the inner surface 12 a of the anvil 12. And the insertion part 3 begins to bend by the pressing force F of the Z direction which goes to the base part 2 acting on the needle tip part 4 which contacts the inner surface 12a of the anvil 12.
 スロット11bからの挿入部3の突出量が増加するにつれて、挿入部3のアンビル12の内面12aとの接触位置、すなわち押圧力Fが作用する位置は、挿入部3の外側側面6に沿って針先部4から根元部7へ向かって移動する。このときに、挿入部3が、針先部4から根元部7に向かってしだいに大きくなる断面2次モーメントを有するので、挿入部3は、主な変形部分が断面2次モーメントの小さい部分から断面2次モーメントの大きい部分へ変化しながら、塑性変形していく。 As the amount of protrusion of the insertion portion 3 from the slot 11b increases, the contact position of the insertion portion 3 with the inner surface 12a of the anvil 12, that is, the position where the pressing force F acts is the needle along the outer side surface 6 of the insertion portion 3. It moves from the front part 4 toward the root part 7. At this time, since the insertion portion 3 has a cross-sectional secondary moment that gradually increases from the needle tip portion 4 toward the root portion 7, the insertion portion 3 has a main deformation portion from a portion having a small cross-sectional secondary moment. The plastic deformation occurs while changing to a portion where the moment of inertia of the section is large.
 アンビル12の内面12aのスロット11bと対向する位置には、挿入部3をC字形状に曲げ変形させるためのアンビルポケットが形成されている。したがって、図1(b),(c)に示されるように、挿入部3は、C字形状に変形し、アンビル12側から生体組織Sを再度貫通する。これにより、生体組織Sを2か所で安定的に縫合することができる。 An anvil pocket for bending the insertion portion 3 into a C shape is formed at a position facing the slot 11b of the inner surface 12a of the anvil 12. Accordingly, as shown in FIGS. 1B and 1C, the insertion portion 3 is deformed into a C shape and penetrates the living tissue S again from the anvil 12 side. Thereby, the biological tissue S can be stably sutured at two locations.
 この場合に、本実施形態によれば、第2の角度θ2が、60°未満である第1の角度θ1よりもさらに小さくなっているので、生体組織Sの穿刺時において、内側側面5が、内面11a上の生体組織Sの表面に対して垂直に近い角度で生体組織Sに接触する。これにより、針先部4を生体組織Sに確実に穿刺し、挿入部3を生体組織Sに確実に貫通させることができるという利点がある。 In this case, according to the present embodiment, since the second angle θ2 is further smaller than the first angle θ1 that is less than 60 °, the inner side surface 5 is punctured with the living tissue S. The living tissue S is contacted at an angle close to perpendicular to the surface of the living tissue S on the inner surface 11a. Thereby, there exists an advantage that the needle tip part 4 can puncture the biological tissue S reliably, and the insertion part 3 can be penetrated to the biological tissue S reliably.
 さらに、第1の角度θ1が60°未満であり、かつ、第2の角度θ2が0°よりも大きいので、針先部4において内側側面5と外側側面6とが成す角度は鋭角となり、尖鋭な針先部4が形成される。貫通を目的とするドリル等の器具の先端における角度は約120°である。第1の角度θ1を、このような器具の先端における角度の半分未満にすることで、針先部4の穿刺性能を高め、針先部4を生体組織Sにさらに確実に穿刺することができる。 Further, since the first angle θ1 is less than 60 ° and the second angle θ2 is larger than 0 °, the angle formed by the inner side surface 5 and the outer side surface 6 in the needle tip portion 4 is an acute angle, and the sharpness A sharp needle tip 4 is formed. The angle at the tip of a tool such as a drill for penetration is about 120 °. By making the first angle θ1 less than half of the angle at the tip of such an instrument, the puncture performance of the needle tip portion 4 can be improved, and the needle tip portion 4 can be punctured into the living tissue S more reliably. .
 また、第1の角度θ1が60°未満であるので、針先部4のアンビル12の内面12aとの接触時において、外側側面6が内面12aに対して斜めに接触する。したがって、押圧力Fによって、挿入部3には、該挿入部3を曲げ変形させる曲げモーメントが発生する。これにより、挿入部3を容易に曲げ変形させることができるという利点がある。さらに、押圧力Fの作用点となる針先部4が、支点となる根元部7よりも第2の端部2b側にずれた位置に位置することによって、針先部4に作用する曲げモーメントがより大きくなる。これにより、挿入部3の曲げ変形をさらに容易にすることができるという利点がある。 特に、第1の角度θ1が38°±2°である場合には、生体組織Sへの針先部4の穿刺の容易さと、アンビル12による挿入部3の変形の容易さと、の両方において、高い効果を得ることができる。 Also, since the first angle θ1 is less than 60 °, the outer side surface 6 contacts the inner surface 12a at an angle when the needle tip portion 4 contacts the inner surface 12a of the anvil 12. Therefore, a bending moment that causes the insertion portion 3 to bend and deform is generated in the insertion portion 3 by the pressing force F. Thereby, there exists an advantage that the insertion part 3 can be bend-deformed easily. Further, the bending moment that acts on the needle tip portion 4 when the needle tip portion 4 serving as the point of application of the pressing force F is located at a position shifted to the second end portion 2b side from the root portion 7 serving as the fulcrum. Becomes larger. Thereby, there exists an advantage that the bending deformation of the insertion part 3 can be made still easier. In particular, when the first angle θ1 is 38 ° ± 2 °, both the ease of puncture of the needle tip portion 4 into the living tissue S and the ease of deformation of the insertion portion 3 by the anvil 12, High effect can be obtained.
 本実施形態においては、図3に示されるように、挿入部3の内側側面5に返し8が設けられていてもよい。
 返し8は、針先部4から根元部7に向かう方向の挿入部3に対する生体組織Sの移動を係止するように形成されている。これにより、挿入部3が生体組織Sから抜けてしまうことをさらに確実に防止することができる。
In the present embodiment, as shown in FIG. 3, a barb 8 may be provided on the inner side surface 5 of the insertion portion 3.
The barb 8 is formed to stop the movement of the living tissue S relative to the insertion part 3 in the direction from the needle tip part 4 toward the root part 7. Thereby, it can prevent more reliably that the insertion part 3 slips out from the biological tissue S.
 本実施形態においては、外科用ステープル1が、単一の挿入部3を備えることとしたが、これに代えて、図4に示されるように、ベース部2の長手方向に間隔を空けて設けられた複数の挿入部3を備えていてもよい。
 このようにすることで、さらに効率的に生体組織Sを縫合することができる。この変形例においては、複数の挿入部3の長さ寸法L3の和がベース部2の長さ寸法L2よりも大きくなるように、挿入部3の長さ寸法L3が設計される。
In the present embodiment, the surgical staple 1 is provided with the single insertion portion 3, but instead, it is provided with a space in the longitudinal direction of the base portion 2 as shown in FIG. A plurality of inserted portions 3 may be provided.
By doing so, the living tissue S can be sutured more efficiently. In this modification, the length dimension L3 of the insertion part 3 is designed so that the sum of the length dimensions L3 of the plurality of insertion parts 3 is larger than the length dimension L2 of the base part 2.
 本実施形態においては、挿入部3に作用する押圧力Fの方向が、ベース部2の長手方向に垂直な方向であることとしたが、押圧力Fの方向はこれに限定されるものではなく、カートリッジ11およびアンビル12の設計に応じて適宜変更することができる。したがって、内側側面5および外側側面6の形状は、押圧力Fの方向に応じて適宜設計される。 In the present embodiment, the direction of the pressing force F acting on the insertion portion 3 is a direction perpendicular to the longitudinal direction of the base portion 2, but the direction of the pressing force F is not limited to this. The cartridge 11 and the anvil 12 can be changed as appropriate according to the design. Therefore, the shapes of the inner side surface 5 and the outer side surface 6 are appropriately designed according to the direction of the pressing force F.
1 外科用ステープル
2 ベース部
2a 第1の端部(一端部)
2b 第2の端部(他端部)
3 挿入部
4 針先部
5 内側側面
6 外側側面
7 根元部
8 返し
11 カートリッジ
12 アンビル
11a,12a 内面
DESCRIPTION OF SYMBOLS 1 Surgical staple 2 Base part 2a 1st edge part (one end part)
2b Second end (other end)
DESCRIPTION OF SYMBOLS 3 Insertion part 4 Needle-tip part 5 Inner side surface 6 Outer side surface 7 Root part 8 Return 11 Cartridge 12 Anvil 11a, 12a Inner surface

Claims (5)

  1.  アンビルおよびカートリッジを有する外科用ステープラに使用され、前記カートリッジ内から前記アンビルに向かって押し出されて前記アンビルとの接触によって所定の方向の押圧力が作用する外科用ステープルであって、
     一端部と他端部とを有する長尺形状のベース部と、
     該ベース部の前記一端部から前記ベース部の長手方向に交差する方向に突出し、前記押圧力によって変形可能な挿入部と、
    を備え、
     前記挿入部が、前記他端部側に位置する内側側面と、前記他端部とは反対側に位置する外側側面と、先端において前記内側側面と前記外側側面とによって形成される角部からなる針先部と、を有し、
     前記外側側面および前記内側側面が、下記条件式(1)を満足する形状を有する
    外科用ステープル。
     (1)    60°>θ1>θ2>0°
     ただし、
     θ1は、前記外側側面の、前記針先部における前記ベース部と前記挿入部とによって画定される平面に沿う方向の接線と、前記所定の方向と、が成す角度であり、
     θ2は、前記内側側面の前記針先部における前記平面に沿う方向の接線と、前記所定の方向と、が成す角度である。
    A surgical staple that is used in a surgical stapler having an anvil and a cartridge, is pushed toward the anvil from within the cartridge, and is applied with a pressing force in a predetermined direction by contact with the anvil,
    An elongated base having one end and the other end;
    An insertion part protruding from the one end of the base part in a direction intersecting the longitudinal direction of the base part, and deformable by the pressing force;
    With
    The insertion portion includes an inner side surface located on the other end side, an outer side surface located on the opposite side of the other end portion, and a corner formed by the inner side surface and the outer side surface at the tip. A needle tip portion,
    The surgical staple having a shape in which the outer side surface and the inner side surface satisfy the following conditional expression (1).
    (1) 60 °>θ1>θ2> 0 °
    However,
    θ1 is an angle formed by a tangent line in a direction along a plane defined by the base portion and the insertion portion in the needle tip portion of the outer side surface and the predetermined direction;
    θ2 is an angle formed by a tangent line in the direction along the plane of the needle tip portion of the inner side surface and the predetermined direction.
  2.  前記針先部が、前記所定の方向に垂直な方向において、前記ベース部の前記一端部よりも前記他端部側に位置する
    請求項1の外科用ステープル。
    The surgical staple according to claim 1, wherein the needle tip portion is located closer to the other end portion than the one end portion of the base portion in a direction perpendicular to the predetermined direction.
  3.  前記外側側面の表面粗さが、前記内側側面の表面粗さよりも小さい
    請求項1または請求項2に記載の外科用ステープル。
    The surgical staple according to claim 1 or 2, wherein a surface roughness of the outer side surface is smaller than a surface roughness of the inner side surface.
  4.  前記挿入部における、前記平面に垂直な方向の軸回りの断面2次モーメントが、前記針先部から前記一端部に連結している根元部に向かって連続的に大きくなる
    請求項1から請求項3のいずれかに記載の外科用ステープル。
    The cross-section secondary moment about an axis in a direction perpendicular to the plane in the insertion portion continuously increases from the needle tip portion toward a root portion connected to the one end portion. The surgical staple according to any one of 3 above.
  5.  前記挿入部の前記所定の方向における寸法が、前記ベース部の長手方向の寸法よりも大きい
    請求項1から請求項4のいずれかに記載の外科用ステープル。
    The surgical staple according to any one of claims 1 to 4, wherein a dimension of the insertion portion in the predetermined direction is larger than a dimension of the base portion in a longitudinal direction.
PCT/JP2016/050960 2016-01-14 2016-01-14 Surgical staple WO2017122319A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2017561461A JP6701233B2 (en) 2016-01-14 2016-01-14 Medical staples
PCT/JP2016/050960 WO2017122319A1 (en) 2016-01-14 2016-01-14 Surgical staple

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2016/050960 WO2017122319A1 (en) 2016-01-14 2016-01-14 Surgical staple

Publications (1)

Publication Number Publication Date
WO2017122319A1 true WO2017122319A1 (en) 2017-07-20

Family

ID=59311085

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/050960 WO2017122319A1 (en) 2016-01-14 2016-01-14 Surgical staple

Country Status (2)

Country Link
JP (1) JP6701233B2 (en)
WO (1) WO2017122319A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10881400B2 (en) 2016-11-18 2021-01-05 Olympus Corporation Medical stapler system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002320620A (en) * 2001-04-25 2002-11-05 Inprest Co Ltd Surgical staple and stapler
US8662369B1 (en) * 2010-05-27 2014-03-04 Cardica, Inc. Barbed surgical staple

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4582237A (en) * 1983-08-26 1986-04-15 Anthony Storace Surgical stapling system, apparatus and staple
DE4014653A1 (en) * 1990-05-08 1991-11-14 Beiersdorf Ag SURGICAL CLAMP
NL9100174A (en) * 1991-02-01 1992-09-01 Philips Nv COLOR IMAGE DISPLAY AND COLOR CAMERA.
CA2838528C (en) * 2005-06-02 2016-01-05 Tyco Healthcare Group Lp Multiple coil staple and staple applier
US20100191262A1 (en) * 2009-01-26 2010-07-29 Harris Jason L Surgical stapler for applying a large staple through small delivery port and a method of using the stapler to secure a tissue fold

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002320620A (en) * 2001-04-25 2002-11-05 Inprest Co Ltd Surgical staple and stapler
US8662369B1 (en) * 2010-05-27 2014-03-04 Cardica, Inc. Barbed surgical staple

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10881400B2 (en) 2016-11-18 2021-01-05 Olympus Corporation Medical stapler system

Also Published As

Publication number Publication date
JP6701233B2 (en) 2020-05-27
JPWO2017122319A1 (en) 2018-11-22

Similar Documents

Publication Publication Date Title
US10842500B2 (en) Clip unit
EP1695668B1 (en) Surgical stapler producing a sound or a sensation of impact after bending of the staple is complete
EP2995263B1 (en) Endoscopic treatment instrument
EP2985048A1 (en) Injection needle
JP2013063107A (en) Clip unit, ligation device using the same, and method for fabricating the clip unit
EP1943963A3 (en) Surgical stapling device with a curved end effector
JP6084347B1 (en) Endoscopic treatment tool
EP2995262A1 (en) Endoscopic treatment instrument
JP2016538951A (en) Shaving blade cartridge
JP2009153769A (en) Suture needle for medical use
WO2017122319A1 (en) Surgical staple
US9332986B2 (en) Medical stapler
WO2017126128A1 (en) Surgical staple and surgical stapler
JP6516275B1 (en) Binding tool
WO2016075740A1 (en) Medical staple
JP2010154961A (en) Suture needle
EP3583908A1 (en) Dental instrument with a flexible tip end and method of manufacture
JP5266358B2 (en) Needle holder
WO2017199392A1 (en) Medical stapler system
JP5810256B2 (en) Binding tools and files
CN115068013A (en) Endoscopic treatment instrument and jig device
JP6730482B1 (en) Single wire for medical treatment instrument and medical treatment instrument
JP2010000337A (en) Successive-firing clip treatment instrument
US20240108355A1 (en) Cartridge system, cartridge and method for loading clip unit
JP5938123B1 (en) Pinch

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16884922

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 2017561461

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16884922

Country of ref document: EP

Kind code of ref document: A1