JP4169170B2

JP4169170B2 - Disposable needle holder

Info

Publication number: JP4169170B2
Application number: JP31251298A
Authority: JP
Inventors: 順二諏訪多
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-11-02
Filing date: 1998-11-02
Publication date: 2008-10-22
Anticipated expiration: 2018-11-02
Also published as: JP2000135218A

Description

【０００１】
【発明の属する技術分野】
本発明は、手術用器具、特に手術時に、皮膚、臓器の縫合等に際して縫合用の針を保持するための使い捨て持針器に関する。
【０００２】
【従来の技術】
従来、持針器として、例えば、図６に示すような金属製のへガール持針器が知られている。この持針器は、支軸２２で回転自在に連結された一対のバー２３，２４の先端側を縫合針を挟んで保持する一対の挟着部２５，２６とし、他端側を一対の操作レバー２７，２８とし、該操作レバー２７，２８の開閉動作により挟着部２５，２６を開閉するようになっている。操作レバー２７，２８の端部に指通し部２９，３０がそれぞれ形成されている。支軸２２の中心から指通し部２９，３０の中心までの距離を支軸２２の中心から挟着部２５，２６の先端までの距離より大きくしてあり、軽い操作力で大きな挟着力が得られるようになっている。また、指通し部２９，３０の対向する部位には、挟着部２５，２６で縫合針を保持した状態で操作レバー２７，２８を係止する係止部３１が設けられている。この係止部３１は、ラチェット爪３１と、この爪３１が係合するラチェット歯３２とからなる。また、この持針器は、全体がステンレス等の金属材料で作られており、挟着部２５，２６の対向面には硬度が高く摩耗の少ないダイヤモンドが使用されている。そして、この持針器は、皮膚、臓器の縫合等の手術時の縫合を行う際には、オートクレーブ等による高圧蒸気滅菌により消毒して使用される。そして、皮膚、臓器の縫合等の手術時の縫合においては、図６の状態で挟着部２５，２６間で縫合針を掴み、両指通し部２９，３０を引き寄せてラチェット爪３１をラチェット歯３２に係合させると、挟着部２５，２６間で針が保持される。
【０００３】
【発明が解決しようとする課題】
しかしながら、上記従来の持針器では、全体がステンレス等の金属材料で作られているので、材料費が高く、面倒な機械加工が必要になり、製造コストが高くなってしまうという問題があった。また、上記従来の持針器は、高価なものであるため、上記消毒を行って繰り返し使用される。そのため、上記消毒の設備のない場所、例えば被災地等で緊急に縫合手術を行うような場合、多数の被災による受傷者に対して手術用器具として持針器を数多く用意する必要があるが、用意する数にも限界があり、皮膚縫合等の緊急手術を困難にしているという問題があった。
【０００４】
さらには、ＨＩＶ感染症（エイズ）等のようにまだ完全に感染経路の解明されていない感染症の患者の手術では、持針器等の手術用器具の再使用は極力避けることが望ましい。
【０００５】
本発明は、このような従来の問題点に着目してなされたもので、製造コストの大幅な低減を図って使い捨て可能にし、消毒の設備のない場所で多量の手術用器具を必要とする場合や、感染の危険のある場合に便利な使い捨て持針器を提供することである。
【０００６】
【課題を解決するための手段】
上記課題を解決するために、請求項１に係る使い捨て持針器は、一対の操作レバー２ａ，３ａの先端側に連結部１３，１４を介して縫合針を挟んで保持する一対の挟着部５，６を形成し、前記一対の操作レバー２ａ，３ａの後端部に円形状の指通し部７，８をそれぞれ形成してなり、前記一対の操作レバー２ａ，３ａの前記連結部１３，１４が支軸１で回転自在に連結され、前記操作レバー２ａ，３ａの開閉動作により前記挟着部５，６を開閉する鋏形式の持針器において，
前記挟着部５，６および操作レバー２ａ，３ａを構成する少なくとも前記一対のバー２，３を、ナイロン樹脂に、重量比で４０％〜４５％のガラス繊維を加えた材料で構成してなり，
前記一対の操作レバー２ａ，３ａは、それぞれ互いに外側へ湾曲した形状を有し、弾性変形可能に形成されており，
前記連結部１３，１４は、それぞれ扁平に形成されており、一方の連結部１４の前端部及び後端部には、段差部１５，１６がそれぞれ形成され、前端部の段差部１５より前側の部位が前記一方の挟着部５を構成し、他方の連結部１３の前端部及び後端部には、段差部１７が形成され、前端部の段差部１７より前側の部位が前記他方の挟着部６を構成し、両方の連結部１３，１４は各々の対向平面が当接し互いに干渉しないように前記支軸１により回転自在に連結されており，
前記挟着部５，６は、先端側に縫合針を挟んで保持する保持面１８，１９が形成され、該保持面１８，１９に縫合針との摩擦を大きくするための凹凸部１８ａ，１９ａが形成されてなっており，
前記一方の指通し部８の後端側に設けられ、該指通し部８の後端側から他方の指通し部７側へ延びる細長い薄板状の舌片１２の先端に形成されるラチェット爪１０と、前記他方の指通し部７の後端側の外周に複数個の歯からなるラチェット歯１１とによって構成され、前記操作レバー２ａ，３ａを開状態から前記両方の指通し部７，８を引き寄せ相互に接近して、舌片１２を弾性変形させてラチェット爪１０をラチェット歯１１の歯に係合して係止し前記操作レバー２ａ，３ａを弾性変形した状態に保持する係止部９を設け，
てなることを特徴とする。
かかる構成によれば、挟着部および操作レバーを構成する少なくとも一対のバーがナイロン樹脂に重量比で４０％〜４５％のガラス繊維を加えて強度を増加させた材料で作られているので、上記従来技術のように、ステンレス等の材料費の高い金属材料を使う必要がなく、面倒な機械加工も不要になり、そのため、製造コストが大幅に低減され、使い捨てが可能になる。その結果、消毒の設備のない場所、例えば被災地等で緊急に縫合手術を行う場合のように多量の手術器材を必要とする場合や、感染の危険のある場合に、使い捨て可能な多量の持針器を安価に提供することができる。
【０００７】
また、請求項２に係る使い捨て持針器は、請求項１に係る使い捨て持針器における挟着部５，６の先端側に形成される保持面１８，１９を，操作レバー２ａ，３ａが開状態で先端側だけが当接し、後端側へ向かうにつれて隙間が大きくなるように対向して形成されていることを特徴とする。
すなわち、操作レバー２ａ，３ａの中心軸（両レバーが線対象となる軸）と挟着部５，６の同様の中心軸とが前記開状態において一直線にならずに角度を持って交差するように設定されている。
かかる構成によれば、操作レバー２ａ，３ａを開状態から閉動すると、挟着部５，６の先端部に強い挟着力を発生させることができ、挟着部５，６で縫合用の針を保持する場合、針に厚みがあるために、針を保持する挟着力はすべて挟着部５，６の先端部に掛かり、挟着部５，６の先端部に発生する強い挟着力で針を確実に安定して保持することができる。そして、これにより従来樹脂製器具による保持力では不可能とされていた樹脂製の持針器を可能とすることができる。
【０００８】
また、請求項３に係る使い捨て持針器は、挟着部５，６の先端側に形成される保持面１８，１９の後端側を，操作レバー２ａ，３ａを開状態から閉状態になったときに、挟着部５，６の保持面１８，１９が互いに密着するような弾性変形が生じる凹部２０，２１に形成したことを特徴とする。
かかる構成によれば、操作レバー２ａ，３ａを開状態から閉動すると、挟着部５，６の先端部に強い挟着力を発生させることができ、挟着部５，６の先端部に発生する強い挟着力で針を確実に安定して保持できる。そして、これにより従来樹脂製器具による保持力では不可能とされていた樹脂製の持針器を可能とすることができる。
【０００９】
【発明の実施の形態】
以下、本発明に係る使い捨て持針器の実施の形態を図面に基づいて説明する。図１は本発明に係る使い捨て持針器の実施の形態の一例を示す平面図で、開状態を示す平面図、図２は図１の側面図、図３は図１に示す使い捨て持針器の閉状態を示す図、図４は図１に示す開状態にある使い捨て持針器の先端部を示す拡大図、そして、図５は図３に示す閉状態にある使い捨て持針器の先端部を示す拡大図である。
【００１０】
本例の使い捨て持針器は、図１及び図２に示すように、支軸１で回転自在に連結された一対のバー２，３の先端側を針を挟んで保持する一対の挟着部５，６とし、他端側を一対の操作レバー２ａ，３ａとし、該操作レバー２ａ，３ａの開閉動作により挟着部５，６を開閉する鋏形式のものである。
挟着部５，６および操作レバー２ａ，３ａを構成する一対のバー２，３は、ナイロン樹脂にガラス繊維を加えた材料で作られている。
【００１１】
両操作レバー２ａ，３ａの端部には、ほぼ円形状の指通し部７，８がそれぞれ形成されている。支軸１の中心から指通し部７，８の中心までの距離Ｌ１を、支軸１の中心から挟着部５，６の先端までの距離Ｌ２より大きくしてあり、これによって、軽い操作力で、針を大きな挟着力で保持できるようになっている。本例では、例えば、Ｌ１をＬ２の５〜６倍程度にしてあり、指通し部７，８を引き寄せて挟着部５，６で針を保持する際の操作力が小さくなっていると共に、挟着部５，６で大きな挟着力が得られるようになっている。
【００１２】
更に、前記操作レバー２ａ，３ａは互いに外側へ湾曲した形状に形成されている。これにより、操作レバー２ａ，３ａを閉動したとき、操作レバー２ａ，３ａの弾性変形による反発力が挟着部に強挟着力として作用する。
【００１３】
両操作レバー２ａ，３ａの指通し部７，８の後端側には、操作レバー２ａ，３ａを図１に示す開状態から閉動させて（引き寄せて）弾性変形させたとき、相互に接近して係止し操作レバー２ａ，３ａを弾性変形した状態（図３に示す閉状態）に保持する係止部９が設けられている。すなわち、この係止部９は、挟着部５，６間に針を保持した閉状態で両操作レバー２ａ，３ａを係止する。
【００１４】
この係止部９は、一方の操作レバー３ａの指通し部８の後端側に設けたラチェット爪１０と、他方の操作レバー２ａの指通し部７の後端側に設けたラチェット歯１１とからなる。ラチェット爪１０は、指通し部８の後端側から指通し部７側へ延びる細長い薄板状の舌片１２の先端に形成されている。一方、ラチェット歯１１は、指通し部７の後端部外周に複数個（本例では２個）設けられている。また、図１に示す開状態において、指通し部７，８に親指と人差し指をそれぞれ通して両指通し部７，８を引き寄せると、舌片１２が弾性変形してラチェット爪１０がラチェット歯１１の１段目の歯に係合する（図３参照）ようになっている。また、この状態で指通し部７，８をさらに引き寄せると、ラチェット爪１０がラチェット歯１１の２段目の歯に係合するようになっている。すなわち、挟着部５，６間で保持する針の太さに応じてラチェット爪１０をラチェット歯１１に係合させる位置を２段階に切り換えられるようになっている。また、図３に示す閉状態でラチェット爪１０をラチェット歯１１から外す際には、指通し部７を人差し指で操作してラチェット歯１１を図３の紙面にほぼ垂直な方向に少しずらすだけでラチェット爪１０がラチェット歯１１から簡単に外れるようになっている。
【００１５】
両バー２，３の支軸１との連結部１３，１４はそれぞれ扁平に形成されており、両連結部１３，１４は各々の対向平面が当接した状態で支軸１により回転自在に連結されている。バー３の扁平な連結部１４の前端部及び後端部には、段差部１５，１６がそれぞれ形成されている（図１及び図２参照）。バー３にあっては、段差部１５より前側（図１の左側）の部位が挟着部５になっており、段差部１６より後側は円形の断面を有する操作レバー３ａになっている。一方、バー２の扁平な連結部１３の前端部には段差部１７（図２参照）が形成されており、連結部１３の後端部にも段差部（図示略）が形成されている。また、バー２にあっては、段差部１７より前側の部位が挟着部６になっており、不図示の後端部側の段差部より後側は円形の断面を有する操作レバー２ａになっている。そして、バー２の連結部１３をバー３の段差部１５，１６の間に位置させると共にバー３の連結部１４をバー２の段差部１７と後端部側の段差部との間に位置させた状態で、両連結部１３，１４は互いに干渉しないように支軸１により回転自在に連結されている。
【００１６】
また、挟着部５，６を開閉させる一対の操作レバー２ａ，３ａは、挟着部５，６の先端が図１および図４に示すように閉じた状態にあってもまだ開いた状態にあるように設定されていると共に、操作レバー２ａ，３ａを図１の位置から更に閉動することにより両操作レバー２ａ，３ａを弾性変形させ、該両操作レバー２ａ，３ａの弾性変形による反発力を挟着部５，６に強挟着力として作用させるように構成されている。この作用と前記互いに外側へ湾曲した形状に形成されている操作レバー２ａ，３ａの弾性変形による反発力により挟着部に作用する強挟着力とが相まって、該両操作レバーの弾性変形による反発力を挟着部により強挟着力として作用させる。
【００１７】
すなわち、挟着部５，６の先端側の保持面１８，１９は、図１に示す開状態で先端側だけが当接し（図４参照）、後端側へ向かうにつれて隙間が大きくなるように対向している。そして、挟着部５，６の後端側には、図１および図４に示す開状態で操作レバー２ａ，３ａを閉動すると、保持面１８，１９が密着するような弾性変形を挟着部５，６にそれぞれ生じさせる凹部２０，２１が設けられている。このように、図４に示す開状態で挟着部５，６の保持面１８，１９間に後端側へ向かうにつれて大きくなる隙間ができるのは、操作レバー２ａ，３ａの中心軸（両レバーが線対象となる軸）と挟着部５，６の同様の中心軸とが前記開状態において一直線にならずに角度を持って交差するように設定されているからである。これによって、操作レバー２ａ，３ａを図１の開状態から閉動すると、挟着部５，６の先端部に強い挟着力を発生させることができる。そして、挟着部５，６で縫合用の針を保持する場合、針に厚みがあるために、針を保持する挟着力はすべて挟着部５，６の先端部に掛かる。したがって、挟着部５，６の先端部に発生する強い挟着力で針を確実に安定して保持できるようになっている。これにより従来樹脂製器具による保持力では不可能とされていた樹脂製の持針器を可能とすることができる。
【００１８】
更に、前記保持面１８，１９には縫合針との摩擦を大きくするため、凹凸部１８ａ，１９ａが形成されている。これにより保持面１８，１９による縫合針の保持力が増加する。
【００１９】
上記の構成を有する使い捨て持針器は、一対の操作レバー２ａ，３ａ、或いは一対の操作レバー２ａ，３ａ及び支軸１を含む全体を、ナイロン樹脂にガラス繊維を加えた材料で作られている。
【００２０】
本例の持針器によれば、一対の操作レバー２ａ，３ａ、或いは一対の操作レバー２ａ，３ａ及び支軸１を含む全体を、ナイロン樹脂にガラス繊維を加えて強度を増加させた材料で作ってあるので、上記従来技術のように、ステンレス等の材料費の高い金属材料を使う必要がなく、射出形成法等により作ることができるため面倒な機械加工が不要になる。そのため、製造コストを大幅に低減することができ、使い捨て可能にすることができる。これによって、オートクレーブ等による高圧蒸気滅菌を行う消毒設備のない場所、例えば被災地等で緊急に縫合手術を行う場合のように多量の手術用器具を必要とする場合や、感染の危険のある場合に便利であり、滅菌パックなどで多量に保存しておくことで、使い捨て可能な多量の持針器を様々な条件の場所において安価に提供することができる。
【００２１】
また、本例の持針器によれば、一対のバー２，２は、ナイロン樹脂にガラス繊維を加えて強度を増加させた材料で作られているので、上記従来技術のようにステンレス等の金属材料で作る場合と比べて、強度を確保するために太く作らざるを得ない。しかし、両操作レバー２ａ，３ａの端部に形成した指通し部７，８の後端側に両操作レバー２ａ，３ａを弾性変形した状態（図３の開状態）に保持する係止部９が設けられているので、両操作レバー２ａ，３ａの間に係止部９が介在せず、挟着部５，６で縫合針を保持しかつ両操作レバー２ａ，３ａを弾性変形した状態に係止部９により保持した時、両操作レバー２ａ，３ａを互いに平行に近づいた状態に保持することができる（図３参照）。これにより、この状態における両操作レバー２ａ，３ａの把持幅を従来の金属製のものに近い幅とすることができ、両操作レバー２ａ，３ａを把持して皮膚や臓器等の縫合を行う際に、術者が両操作レバー２ａ，３ａを把持し易く、使い勝手が良い。
【００２２】
また、本例によれば、上述したように操作レバー２ａ，３ａを図１の開状態から閉動すると、前記のように挟持部５，６に両操作レバー２ａ，３ａの弾性変形によってより強い挟着力が作用し、挟持部５，６は保持面１８，１９間に図４に示す隙間ができた状態から図５に示すように保持面１８，１９が密着するように弾性変形するので、挟着部５，６の先端部に強い挟着力を発生させることができ、この先端部で針を確実に安定的に保持することができる。
【００２３】
【実施例】
一対の操作レバー２ａ，３ａ、或いは一対の操作レバー２ａ，３ａ及び支軸１を含む全体を、ナイロン樹脂に、重量比で４０％〜４５％のガラス繊維を加えた材料で作った。このような範囲内にガラス繊維の重量比を設定したのは、その重量比を４０％より小さくすると十分な強度が得られないと共に、その重量比を４５％より大きくするともろくなってしまうからである。
【００２４】
【発明の効果】
以上説明したように、請求項１に係る発明によれば、製造コストを大幅に低減して使い捨て可能にすることができ、これによって、消毒設備のない場所、例えば被災地等で緊急に縫合手術を行う場合のように多量の手術用器具を必要とする場合や、感染の危険のある場合に便利であり、使い捨て可能な多量の持針器を安価に提供することができる。
【００２５】
また、請求項２に係る発明によれば、操作レバーを開状態から閉動すると、挟着部の先端部に強い挟着力を発生させることができ、挟着部で縫合用の針を保持する場合、針に厚みがあるために、針を保持する挟着力はすべて挟着部の先端部に掛かり、挟着部の先端部に発生する強い挟着力で針を確実に安定して保持することができる。
【００２６】
また、請求項３に係る発明によれば、操作レバーを開状態から閉動すると、挟着部の先端部に強い挟着力を発生させることができ、挟着部の先端部に発生する強い挟着力で針を確実に安定して保持できる。
【図面の簡単な説明】
【図１】本発明に係る使い捨て持針器の実施の形態の一例を示す平面図で、開状態を示す図。
【図２】図１の側面図。
【図３】図１に示す使い捨て持針器の閉状態を示す図。
【図４】図１に示す開状態にある使い捨て持針器の先端部を示す拡大図。
【図５】図３に示す閉状態にある使い捨て持針器の先端部を示す拡大図。
【図６】従来の持針器を示す平面図で、開状態を示す図。
【符号の説明】
１支軸
２，３バー
２ａ，３ａ操作レバー
５，６挟着部
７，８指通し部
９係止部
１０ラチェット爪
１１ラチェット歯
１２舌片
１３，１４連結部
１５，１６，１７段差部
１８，１９保持面
１８ａ，１９ａ凹凸部
２０，２１凹部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a surgical instrument, and more particularly, to a disposable needle holder for holding a suturing needle during suturing of skin, organ, etc. during surgery.
[0002]
[Prior art]
Conventionally, as a needle holder, for example, a metal needle holder as shown in FIG. 6 is known. This needle holder has a pair of sandwiching portions 25 and 26 for holding the distal ends of a pair of bars 23 and 24 rotatably connected by a support shaft 22 with a suture needle held between them, and the other end is a pair of operations. As the levers 27 and 28, the sandwiching portions 25 and 26 are opened and closed by opening and closing the operation levers 27 and 28. Finger passages 29 and 30 are formed at the ends of the operation levers 27 and 28, respectively. The distance from the center of the support shaft 22 to the centers of the finger passage portions 29 and 30 is larger than the distance from the center of the support shaft 22 to the tips of the sandwiching portions 25 and 26, and a large clamping force can be obtained with a light operating force. It is supposed to be. In addition, a locking portion 31 that locks the operation levers 27 and 28 in a state where the suture needle is held by the sandwiching portions 25 and 26 is provided at the opposing portions of the finger passage portions 29 and 30. The locking portion 31 includes a ratchet claw 31 and ratchet teeth 32 with which the claw 31 engages. Further, the needle holder is entirely made of a metal material such as stainless steel, and diamond having high hardness and low wear is used on the opposing surfaces of the sandwiching portions 25 and 26. The needle holder is used after being sterilized by high-pressure steam sterilization using an autoclave or the like when performing suturing at the time of surgery such as suturing of skin or organ. In the case of suturing at the time of surgery such as skin and organ suturing, the suturing needle is grasped between the sandwiching portions 25 and 26 in the state shown in FIG. When engaged with the pin 32, the needle is held between the sandwiching portions 25 and 26.
[0003]
[Problems to be solved by the invention]
However, since the conventional needle holder is entirely made of a metal material such as stainless steel, there is a problem that the material cost is high, troublesome machining is required, and the manufacturing cost is increased. . Moreover, since the said conventional needle holder is expensive, it is used repeatedly after performing the said disinfection. Therefore, when performing a surgical operation urgently in a place without the above-mentioned disinfection facilities, such as a disaster-stricken area, it is necessary to prepare a large number of needle holders as surgical instruments for many injured persons due to the disaster, There is a limit to the number of preparations, which makes it difficult to perform emergency operations such as skin suturing.
[0004]
Furthermore, it is desirable to avoid re-use of surgical instruments such as needle holders as much as possible in the operation of patients with infectious diseases such as HIV infection (AIDS), etc. whose infection route has not been completely elucidated.
[0005]
The present invention has been made by paying attention to such conventional problems, and can be made disposable by greatly reducing the manufacturing cost, and a large amount of surgical instruments are required in a place without disinfection facilities. Or to provide a disposable needle holder that is convenient when there is a risk of infection.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the disposable needle holder according to claim 1 is a pair of sandwiching portions that hold the suture needle between the distal ends of the pair of operation levers 2a, 3a via the coupling portions 13, 14. 5 and 6, and circular finger passage portions 7 and 8 are formed at the rear ends of the pair of operation levers 2a and 3a, respectively, and the connecting portions 13 and 8 of the pair of operation levers 2a and 3a are formed. 14 is a hook-type needle holder that is rotatably connected to the support shaft 1 and opens and closes the clamping portions 5 and 6 by opening and closing operations of the operation levers 2a and 3a.
The clamping portion 5, 6 and the operating lever 2a, at least the pair of bars 2, 3 constituting the 3a, the nylon resin, it was composed of a material obtained by adding 40% to 45% of glass fiber in a weight ratio ,
The pair of operating levers 2a and 3a have shapes that are curved outward from each other, and are formed to be elastically deformable.
The connecting portions 13 and 14 are each formed in a flat shape, and stepped portions 15 and 16 are formed at the front end portion and the rear end portion of one connecting portion 14, respectively. A part forms the one sandwiching part 5, a step part 17 is formed at the front end part and the rear end part of the other connecting part 13, and a part on the front side of the step part 17 at the front end part is the other sandwiching part 5. The attachment portion 6 is configured, and both the connection portions 13 and 14 are rotatably connected by the support shaft 1 so that the respective opposing planes abut and do not interfere with each other.
The sandwiching portions 5 and 6 are formed with holding surfaces 18 and 19 for holding the suturing needle on the tip side, and the holding surfaces 18 and 19 have uneven portions 18a and 19a for increasing friction with the suturing needle. Is formed,
A ratchet claw 10 provided at the rear end side of the one finger passage portion 8 and formed at the front end of an elongated thin plate-like tongue piece 12 extending from the rear end side of the finger passage portion 8 to the other finger passage portion 7 side. And ratchet teeth 11 comprising a plurality of teeth on the outer periphery of the rear end side of the other finger passage portion 7, and the operation levers 2a, 3a are opened from the open state. The engaging portions 9 are brought close to each other to elastically deform the tongue 12 and engage and lock the ratchet pawl 10 with the teeth of the ratchet teeth 11 to hold the operation levers 2a and 3a in an elastically deformed state. Provided
Characterized in that it comprises Te.
According to such a configuration, at least a pair of bars constituting the sandwiching portion and the operation lever are made of a material in which the strength is increased by adding 40% to 45% glass fiber by weight to the nylon resin. Unlike the prior art, it is not necessary to use a metal material having a high material cost such as stainless steel, and troublesome machining is not required. Therefore, the manufacturing cost is greatly reduced, and it can be disposable. As a result, if a large amount of surgical equipment is required, such as when an emergency suture operation is performed in a place without disinfection facilities, such as a disaster-stricken area, or if there is a risk of infection, a large amount of disposable equipment is required. A needle device can be provided at low cost.
[0007]
Further, the disposable needle holder according to claim 2 opens the holding surfaces 18 and 19 formed on the distal end side of the sandwiching portions 5 and 6 in the disposable needle holder according to claim 1 with the operation levers 2a and 3a opened. In this state, only the front end side comes into contact, and the gaps increase toward the rear end side .
In other words, the central axes of the operation levers 2a and 3a (both levers are axes to be lined) and the similar central axes of the sandwiching portions 5 and 6 intersect with each other with an angle instead of being in a straight line in the opened state. Is set to
According to such a configuration, when the operation levers 2a and 3a are moved from the open state, a strong clamping force can be generated at the distal ends of the clamping parts 5 and 6, and the stitching needles 5 and 6 can be stitched. When holding the needle, since the needle is thick, all of the clamping force for holding the needle is applied to the tip of the clamping parts 5 and 6, and the needle has a strong clamping force generated at the tip of the clamping parts 5 and 6. it can be held reliably and stably the. As a result, it is possible to make a resin needle holder that has been impossible with the holding force of a conventional resin tool.
[0008]
In the disposable needle holder according to claim 3, the rear end sides of the holding surfaces 18 and 19 formed on the front end sides of the sandwiching portions 5 and 6 are changed from the open state to the closed state of the operation levers 2a and 3a. The holding surfaces 18 and 19 of the sandwiching portions 5 and 6 are formed in the recesses 20 and 21 in which elastic deformation occurs so that they are in close contact with each other .
According to this configuration, when the operation levers 2a and 3a are moved from the open state, a strong clamping force can be generated at the distal end portions of the sandwiching portions 5 and 6, and generated at the distal end portions of the sandwiching portions 5 and 6. The needle can be held securely and stably with a strong clamping force. As a result, it is possible to make a resin needle holder that has been impossible with the holding force of a conventional resin tool .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a disposable needle holder according to the present invention will be described with reference to the drawings. 1 is a plan view showing an example of an embodiment of a disposable needle holder according to the present invention, a plan view showing an open state, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a disposable needle holder shown in FIG. FIG. 4 is an enlarged view showing the tip of the disposable needle holder in the open state shown in FIG. 1, and FIG. 5 is the tip of the disposable needle holder in the closed state shown in FIG. FIG.
[0010]
As shown in FIGS. 1 and 2, the disposable needle holder of the present example has a pair of clamping portions that hold the distal ends of a pair of bars 2 and 3 that are rotatably connected by a support shaft 1 with a needle interposed therebetween. 5 and 6, and the other end side is a pair of operating levers 2a and 3a, and the hooks 5 and 6 are opened and closed by opening and closing the operating levers 2a and 3a.
The pair of bars 2 and 3 constituting the sandwiching portions 5 and 6 and the operation levers 2a and 3a are made of a material obtained by adding glass fiber to nylon resin.
[0011]
Substantially circular finger passage portions 7 and 8 are formed at the ends of the operation levers 2a and 3a, respectively. A distance L1 from the center of the support shaft 1 to the centers of the finger passage portions 7 and 8 is made larger than a distance L2 from the center of the support shaft 1 to the tips of the sandwiching portions 5 and 6, thereby reducing a light operating force. Thus, the needle can be held with a large clamping force. In this example, for example, L1 is set to about 5 to 6 times L2, and the operation force when the finger passing portions 7 and 8 are attracted to hold the needle with the sandwiching portions 5 and 6 is reduced. A large clamping force can be obtained at the clamping parts 5 and 6.
[0012]
Furthermore, the operation levers 2a and 3a are formed in a shape curved outward. Thereby, when the operation levers 2a and 3a are closed, the repulsive force due to the elastic deformation of the operation levers 2a and 3a acts on the clamping portion as a strong clamping force.
[0013]
When the operating levers 2a and 3a are closed from the opened state shown in FIG. 1 and are elastically deformed by pulling them back to the rear end sides of the finger passing portions 7 and 8 of both operating levers 2a and 3a, they approach each other. Thus, a locking portion 9 is provided that locks and holds the operation levers 2a, 3a in a state of being elastically deformed (closed state shown in FIG. 3). That is, the locking portion 9 locks both the operation levers 2a and 3a in a closed state in which the needle is held between the sandwiching portions 5 and 6.
[0014]
The locking portion 9 includes a ratchet claw 10 provided on the rear end side of the finger passage portion 8 of one operation lever 3a, and a ratchet tooth 11 provided on the rear end side of the finger passage portion 7 of the other operation lever 2a. Consists of. The ratchet claw 10 is formed at the tip of an elongated thin plate-like tongue piece 12 extending from the rear end side of the finger passage portion 8 to the finger passage portion 7 side. On the other hand, a plurality (two in this example) of ratchet teeth 11 are provided on the outer periphery of the rear end portion of the finger passage portion 7. Further, in the open state shown in FIG. 1, when the thumb and index finger are passed through the finger passage portions 7 and 8, and the finger passage portions 7 and 8 are pulled together, the tongue piece 12 is elastically deformed and the ratchet claw 10 becomes the ratchet teeth 11. (See FIG. 3). Further, when the finger passage portions 7 and 8 are further drawn in this state, the ratchet claw 10 is engaged with the second stage teeth of the ratchet teeth 11. That is, the position at which the ratchet pawl 10 is engaged with the ratchet teeth 11 can be switched in two steps according to the thickness of the needle held between the sandwiching portions 5 and 6. Further, when the ratchet claw 10 is removed from the ratchet teeth 11 in the closed state shown in FIG. 3, the finger passage portion 7 is operated with the index finger and the ratchet teeth 11 are only slightly shifted in a direction substantially perpendicular to the paper surface of FIG. The ratchet pawl 10 can be easily detached from the ratchet teeth 11.
[0015]
The connecting portions 13 and 14 of the both bars 2 and 3 with the support shaft 1 are formed flat, and the connecting portions 13 and 14 are connected to the support shaft 1 so as to be freely rotatable with their opposing flat surfaces in contact with each other. Has been. Step portions 15 and 16 are formed at the front end portion and the rear end portion of the flat connecting portion 14 of the bar 3 (see FIGS. 1 and 2). In the bar 3, the front part (left side in FIG. 1) of the step part 15 is the sandwiching part 5, and the rear part of the step part 16 is the operation lever 3a having a circular cross section. On the other hand, a step 17 (see FIG. 2) is formed at the front end of the flat connecting portion 13 of the bar 2, and a step (not shown) is also formed at the rear end of the connecting portion 13. Further, in the bar 2, the front side of the stepped portion 17 is the sandwiching portion 6, and the rear side of the stepped portion on the rear end side (not shown) is an operating lever 2 a having a circular cross section. ing. Then, the connecting portion 13 of the bar 2 is positioned between the step portions 15 and 16 of the bar 3, and the connecting portion 14 of the bar 3 is positioned between the step portion 17 of the bar 2 and the step portion on the rear end side. In this state, the connecting portions 13 and 14 are rotatably connected by the support shaft 1 so as not to interfere with each other.
[0016]
Also, the pair of operation levers 2a and 3a for opening and closing the sandwiching portions 5 and 6 are still open even when the tips of the sandwiching portions 5 and 6 are closed as shown in FIGS. Further, the operating levers 2a and 3a are further closed from the position shown in FIG. 1 to elastically deform the operating levers 2a and 3a, and the repulsive force due to the elastic deformation of the operating levers 2a and 3a. Is made to act on the clamping parts 5 and 6 as a strong clamping force. This action and the strong clamping force acting on the clamping part due to the repulsive force caused by the elastic deformation of the operation levers 2a, 3a formed in the outwardly curved shape are combined, and the repulsive force caused by the elastic deformation of the two operation levers. Is made to act as a strong clamping force by the clamping part.
[0017]
That is, the holding surfaces 18 and 19 on the front end side of the sandwiching portions 5 and 6 are in contact with only the front end side in the open state shown in FIG. 1 (see FIG. 4), and the gap increases toward the rear end side. Opposite. Then, elastic deformations such that the holding surfaces 18 and 19 are in close contact with each other when the operation levers 2a and 3a are closed in the open state shown in FIGS. Concave portions 20 and 21 that are formed in the portions 5 and 6 are provided. As described above, the gap between the holding surfaces 18 and 19 of the sandwiching portions 5 and 6 that increases in the open state shown in FIG. This is because the axis that is the target of the line) and the similar central axis of the sandwiching portions 5 and 6 are set so as to intersect with an angle instead of being in a straight line in the open state. Accordingly, when the operation levers 2a and 3a are closed from the open state of FIG. 1, a strong clamping force can be generated at the tip portions of the clamping parts 5 and 6. When the suture needles are held by the sandwiching portions 5 and 6, since the needle is thick, all of the sandwiching force for holding the needle is applied to the distal end portions of the sandwiching portions 5 and 6. Therefore, the needle can be reliably and stably held by the strong clamping force generated at the distal ends of the clamping parts 5 and 6. As a result, it is possible to make a resin needle holder that has been impossible with the holding force of a conventional resin tool.
[0018]
Further, the holding surfaces 18 and 19 are provided with uneven portions 18a and 19a in order to increase the friction with the suture needle. As a result, the holding force of the suture needle by the holding surfaces 18 and 19 increases.
[0019]
The disposable needle holder having the above-described configuration is made of a material obtained by adding glass fiber to nylon resin, including the pair of operation levers 2a and 3a or the pair of operation levers 2a and 3a and the support shaft 1. .
[0020]
According to the needle holder of the present example, the pair of operation levers 2a and 3a or the whole including the pair of operation levers 2a and 3a and the support shaft 1 is made of a material obtained by adding glass fiber to nylon resin to increase the strength. Since it is made, it is not necessary to use a metal material having a high material cost such as stainless steel as in the prior art, and it can be made by an injection molding method or the like, so that troublesome machining is not required. Therefore, the manufacturing cost can be greatly reduced, and it can be made disposable. When there is a need for a large amount of surgical instruments or when there is a risk of infection, such as when performing an emergency suture operation in a place without disinfection equipment that performs autoclave sterilization using an autoclave, etc. By storing in a large amount in a sterilization pack or the like, a large amount of disposable needle holders can be provided at low cost in various conditions.
[0021]
In addition, according to the needle holder of this example, the pair of bars 2 and 2 are made of a material in which the glass fiber is added to nylon resin to increase the strength. Compared to the case of making it from a metal material, it must be made thick in order to ensure strength. However, the engaging portion 9 that holds both the operating levers 2a and 3a in an elastically deformed state (open state in FIG. 3) on the rear end side of the finger passage portions 7 and 8 formed at the ends of the both operating levers 2a and 3a. Therefore, the locking portion 9 is not interposed between the operation levers 2a and 3a, the suture needle is held by the sandwiching portions 5 and 6, and the operation levers 2a and 3a are elastically deformed. When held by the locking portion 9, both the operating levers 2a and 3a can be held in a state of approaching to each other (see FIG. 3). As a result, the gripping width of the two operating levers 2a and 3a in this state can be made close to that of a conventional metal, and when the two operating levers 2a and 3a are gripped to sew skin, organs or the like Furthermore, it is easy for the surgeon to grasp both the operating levers 2a and 3a, and it is easy to use.
[0022]
Further, according to the present example, when the operation levers 2a and 3a are closed from the open state of FIG. 1 as described above, the holding portions 5 and 6 are stronger due to the elastic deformation of the operation levers 2a and 3a as described above. Since the clamping force acts and the clamping parts 5 and 6 are elastically deformed so that the holding surfaces 18 and 19 are in close contact as shown in FIG. 5 from the state where the gap shown in FIG. A strong clamping force can be generated at the distal end portions of the sandwiching portions 5 and 6, and the needle can be reliably and stably held at the distal end portions.
[0023]
【Example】
The whole including the pair of operation levers 2a and 3a or the pair of operation levers 2a and 3a and the support shaft 1 was made of a material obtained by adding 40% to 45% glass fiber by weight to nylon resin. The reason for setting the weight ratio of the glass fibers within such a range is that if the weight ratio is less than 40%, sufficient strength cannot be obtained, and if the weight ratio is greater than 45%, it becomes brittle. is there.
[0024]
【The invention's effect】
As described above, according to the invention according to claim 1, the manufacturing cost can be greatly reduced to make it disposable, so that an emergency suture operation can be performed in a place where there is no disinfection facility, such as a disaster-stricken area. This is convenient when a large amount of surgical instruments are required as in the case of performing the procedure or when there is a risk of infection, and a large amount of disposable needle holders can be provided at low cost.
[0025]
According to the second aspect of the present invention, when the operation lever is moved from the open state, a strong clamping force can be generated at the tip of the clamping part, and the suture needle is held by the clamping part. In this case, because the needle is thick, all of the clamping force that holds the needle is applied to the tip of the clamping part, and the needle is reliably and stably held by the strong clamping force generated at the tip of the clamping part. Can do.
[0026]
According to the invention of claim 3, when the operating lever is closed from the open state, a strong clamping force can be generated at the tip of the clamping part, and the strong clamping generated at the tip of the clamping part. It is possible to hold the needle reliably and stably with the applied force .
[Brief description of the drawings]
FIG. 1 is a plan view showing an example of an embodiment of a disposable needle holder according to the present invention, and showing an open state.
FIG. 2 is a side view of FIG.
FIG. 3 is a view showing a closed state of the disposable needle holder shown in FIG. 1;
4 is an enlarged view showing the distal end portion of the disposable needle holder in the open state shown in FIG. 1. FIG.
FIG. 5 is an enlarged view showing the distal end portion of the disposable needle holder in the closed state shown in FIG. 3;
FIG. 6 is a plan view showing a conventional needle holder and shows an open state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Support shaft 2, 3 Bar 2a, 3a Operation lever 5, 6 Clamping part 7, 8 Finger passage part 9 Locking part 10 Ratchet claw 11 Ratchet tooth 12 Tongue piece 13,14 Connection part 15,16,17 Step part 18 , 19 Holding surface 18a, 19a Uneven portion 20, 21 Recess

Claims

A pair of sandwiching portions are formed on the distal ends of the pair of operation levers via a connecting portion to hold the suture needle, and circular finger passage portions are formed at the rear ends of the pair of operation levers. becomes, wherein the connection portions of the pair of operating levers are rotatably connected to the support shaft, the scissors-type needle holder for opening and closing the clamping portion by opening and closing operation of the operating lever,
At least the pair of bars constituting the sandwiching portion and the operation lever is made of a material obtained by adding 40% to 45% glass fiber by weight to nylon resin ,
Each of the pair of operating levers has a shape curved outward, and is formed to be elastically deformable.
Each of the connecting portions is formed flat, a step portion is formed at each of the front end portion and the rear end portion of one of the connecting portions, and the front portion of the step portion at the front end portion is the one sandwiching portion. A step portion is formed at the front end portion and the rear end portion of the other connecting portion, and the front side portion of the step portion of the front end portion constitutes the other sandwiching portion, and both the connecting portions are respectively Are opposed to each other so as not to interfere with each other, and are rotatably connected by the support shaft.
The holding part is formed with a holding surface for holding the suturing needle on the distal end side, and an uneven part for increasing friction with the suturing needle is formed on the holding surface,
A ratchet claw provided on the rear end side of the one finger passage portion and formed at the tip of an elongated thin plate-like tongue piece extending from the rear end side of the finger passage portion to the other finger passage portion; It is composed of ratchet teeth consisting of a plurality of teeth on the outer periphery of the rear end side of the finger passage part, and draws both finger passage parts from the open state when the operation lever is in the open state to elastically deform the tongue piece. A locking portion for engaging and locking the ratchet pawl with the ratchet teeth and holding the operation lever elastically deformed;
Disposable needle holder characterized by comprising Te.

The holding surface formed on the front end side of the sandwiching portion is:
2. The disposable needle holder according to claim 1, wherein the operating lever is in an open state so that only the front end side comes into contact with each other so that a gap increases toward the rear end side .

The rear end side of the holding surface formed on the front end side of the sandwiching portion is:
The disposable holding device according to claim 1 or 2 , wherein when the operation lever is changed from an open state to a closed state, the holding lever is formed in a concave portion that undergoes elastic deformation such that the holding surfaces of the sandwiching portions come into close contact with each other. Needle tool.