JP4210944B2 - Osteopathic pin device for fracture treatment - Google Patents
Osteopathic pin device for fracture treatment Download PDFInfo
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- JP4210944B2 JP4210944B2 JP2005160839A JP2005160839A JP4210944B2 JP 4210944 B2 JP4210944 B2 JP 4210944B2 JP 2005160839 A JP2005160839 A JP 2005160839A JP 2005160839 A JP2005160839 A JP 2005160839A JP 4210944 B2 JP4210944 B2 JP 4210944B2
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- 206010017076 Fracture Diseases 0.000 title claims description 18
- 208000010392 Bone Fractures Diseases 0.000 title claims description 16
- 210000000988 bone and bone Anatomy 0.000 claims description 20
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 210000002997 osteoclast Anatomy 0.000 description 30
- 230000001054 cortical effect Effects 0.000 description 6
- 230000009545 invasion Effects 0.000 description 3
- 210000000689 upper leg Anatomy 0.000 description 3
- 208000008924 Femoral Fractures Diseases 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000001599 osteoclastic effect Effects 0.000 description 2
- 210000002303 tibia Anatomy 0.000 description 2
- 229910000883 Ti6Al4V Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910000756 V alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 210000000245 forearm Anatomy 0.000 description 1
- 210000000527 greater trochanter Anatomy 0.000 description 1
- 210000002411 hand bone Anatomy 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 210000002758 humerus Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
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Description
本発明は、大腿骨、脛骨、上腕骨、前腕骨、手骨、その他各種の骨の骨折治療に使用される接骨ピン装置に関する。 The present invention relates to an osteosynthesis pin device used for fracture treatment of femur, tibia, humerus, forearm bone, hand bone, and other various bones.
従来、例えば、大腿骨の骨折治療用接骨ピンとして、先端部分にオネジを形成したオネジつき接骨ピンであって、使用において、該オネジつき接骨ピンの２〜３本を骨折部に螺入し、その各オネジ部により各接骨ピンを抜け止め状態に保管するものや、中空軸内に、先端に１本の弾性フックを有するフック軸を移動自在に挿通し、上記フック軸の進退により上記フックを中空軸の先端孔から外側方へ進退させるフックつき接合ピンであって、使用においては、骨折部に予めドリルにより複数本の接骨ピン挿入孔をあけ、これに上記複数本のフックつき接骨ピンをそれぞれ挿入した後、上記フック軸を前進させて上記フックを中空軸の外側方へ突出させ、該突出フックにより各接骨ピンを回転不能に保持するものが知られている。 Conventionally, for example, as an osteoclast pin for fracture treatment of a femur, an osteoclast pin with a male screw formed at the distal end portion, and in use, two or three of the male screwed bone pin are screwed into the fracture part, Each of the male screw portions keeps each bone pin in a state where it is prevented from coming off, or a hook shaft having one elastic hook at the tip is movably inserted into the hollow shaft, and the hook shaft is moved forward and backward to move the hook. A joint pin with a hook that advances and retracts outward from the tip hole of the hollow shaft. In use, a plurality of osteoclast pin insertion holes are previously drilled in the fractured portion, and the above-mentioned plurality of hooked osteoclast pins are inserted into this hole. It is known that after each insertion, the hook shaft is advanced to project the hook outwardly of the hollow shaft, and each osteoclast pin is held non-rotatable by the projecting hook.
しかし、上記のような従来の接骨ピンは、いずれも骨折部に複数本差しこんで骨折部を固定するものであるため、複数接骨ピンの差しこみ部分の周辺の骨が脆弱化し、その部分から二次的骨折を生起するという重大な欠点があった。 However, since all of the conventional osteoclastic pins as described above are used to fix the fractured part by inserting a plurality of pieces into the fractured part, the bone around the inserted part of the multiple osteoclastic pin is weakened. There was a serious drawback of causing secondary fractures.
しかも、手術において、複数本の接骨ピンを差しこむことから、患部の侵襲が大きくなるばかりでなく、手術に長時間を要し、手術費の患者負担が増大する等の難点もあった。 In addition, since a plurality of osteoclast pins are inserted in the operation, not only the invasion of the affected part is increased, but also the operation takes a long time and the patient burden of the operation cost increases.
本発明は、上記大腿骨、脛骨等の骨折を１本の接骨ピンにより有効に接骨治療し、それにより二次的骨折を防止し、さらに手術による患部の侵襲を小範囲に止めると共に、手術時間及び費用の削減を図ることを課題とする。 The present invention effectively treats fractures of the femur, tibia, and the like with a single osteoclast pin, thereby preventing secondary fractures, further reducing the invasion of the affected area by surgery to a small range, and operating time. And to reduce costs.
上記課題を解決する手段として、本発明は、
軸心に通孔（３）を縦通された中空軸（１）の先端部分外周面にオネジ（４）を形成すると共に、該中空軸（１）の先端部に、上記通孔（３）から中空軸（１）外側方へ分岐開通する複数のフック案内孔を開設し、上記中空軸（１）の通孔（３）内に、先端に適宜長の複数本の弾性フックを有するフック軸（２）を軸方向に進退自在に挿通してなる骨折治療用接骨ピン（Ａ）と、上記フックを上記フック案内孔から外方へ突出させるフック軸進出駆動具（Ｂ）と、上記フックを上記フック案内孔内に後退させるフック軸後退駆動具（Ｃ）とからなり、
上記中空軸（１）の通孔（３）基端部内周面に、上記フック軸進出駆動具（Ｂ）接続用のメネジ（７）を設けると共に、上記フック軸（２）の基端に、該フック軸より小径で外周面にオネジ（１２）を有する進退従動ピン（１１）を同心的に延出し、
上記フック軸進出駆動具（Ｂ）は、上記従動ビン（１１）が挿通されるべき通孔（ｂ）を縦通された案内筒（ａ）の先端部に、上記中空軸（１）のメネジ（７）と螺合すべき接続用オネジ（ｃ）を、案内筒（ａ）の後端部に螺進用メネジ（ｄ）をそれぞれ設け、この案内筒（ａ）内に螺進用オネジ軸（ｆ）を、上記螺進用メネジ（ｄ）と螺合状態で、挿入し、該螺進用オネジ軸（ｆ）の前端に押し棒（ｇ）を、後端に回しハンドル（ｈ）をそれぞれ突設してなり、
上記フック軸後退駆動具（Ｃ）は、通孔（ｊ）を縦通された案内筒（ｉ）内に引きロッド（ｍ）を摺動自在に挿入し、該引きロッド（ｍ）の前部軸心部に、上記フック軸（２）の従動ピン（１１）と螺合すべき螺退用メネジ（ｎ）を、引きロッド（ｍ）の後端に回しハンドル（Ｐ）をそれぞれ設け、さらに上記案内筒（ｉ）の先端部と上記中空軸（１）の後端部を回転不能に一体化すべき回り止め係止手段を備えてなる、
骨折治療用接骨ピン装置を提案する。
As means for solving the above problems, the present invention provides:
A male screw (4) is formed on the outer peripheral surface of the distal end portion of the hollow shaft (1) vertically passed through the through hole (3) at the shaft center, and the through hole (3) is formed at the distal end of the hollow shaft (1 ). A hook shaft having a plurality of hook guide holes branched and opened outward from the hollow shaft (1) and having a plurality of appropriately long elastic hooks at the tip in the through hole (3) of the hollow shaft (1) (2) a bone treatment pin for fracture treatment (A) inserted in such a manner as to be able to advance and retreat in the axial direction; a hook shaft advancing drive tool (B) for projecting the hook outward from the hook guide hole; A hook shaft retraction drive tool (C) for retreating into the hook guide hole,
A female screw (7) for connecting the hook shaft advancement drive tool (B) is provided on the inner peripheral surface of the through hole (3) of the hollow shaft (1), and at the base end of the hook shaft (2), An advancing / retracting pin (11) having a smaller diameter than the hook shaft and having an external thread (12) on the outer peripheral surface extends concentrically,
The hook shaft advancing drive tool (B) includes a female screw of the hollow shaft (1) at the tip of the guide tube (a) vertically passed through the through hole (b) through which the driven bin (11) is to be inserted. (7) A connecting male screw (c) to be screwed and a female screw (d) for screwing are provided at the rear end of the guide tube (a), and a screwing screw shaft is provided in the guide tube (a). (F) is inserted into the threaded female screw (d) in a screwed state, the push rod (g) is turned to the front end of the male screw shaft (f), and the handle (h) is turned to the rear end. Each projecting
The hook shaft retraction drive tool (C) has a pull rod (m) slidably inserted into a guide tube (i) vertically passed through a through hole (j), and a front portion of the pull rod (m). At the shaft center, a female screw (n) to be screwed with the driven pin (11) of the hook shaft (2) is turned to the rear end of the pulling rod (m), and a handle (P) is provided. A detent locking means for integrating the front end of the guide tube (i) and the rear end of the hollow shaft (1) in a non-rotatable manner ;
The osteoclast pin device for fracture treatment is proposed.
本発明の骨折治療用接骨ピン装置によれば、これを骨折部分に差しこむと、オネジ部分により接骨ピンを軸方向に移動不能に保持すると共に、突出した複数本の弾性フックにより該接骨ピンを回転不能に保持して、接骨ピン全体を差しこみ位置に確実に固定することができ、それにより１本の接骨ピンにより十分に接骨治療を果すことができると共に、二次的骨折を回避することができる。さらに１本の接骨ピンの差しこみで足りるから、患部の侵襲を最小限に止めると共に、手術時間及び費用の削減を実現できるのである。又、さらに、操作においては、弾性フックの突出及び後退は、フック軸進出駆動具（Ｂ）及びフック軸後退駆動具（Ｃ）の回し操作によりそれぞれ確実、容易に行うことができるのである。
According to the osteoclast pin apparatus for fracture treatment of the present invention, when this is inserted into the fracture part, the osteocushion pin is held immovably in the axial direction by the male screw part, and the osteoclast pin is held by the plurality of protruding elastic hooks. It can be held non-rotatable and the whole osteoclast pin can be securely fixed in the inserted position, so that the osteoclast can be sufficiently treated by one osteoclast pin and avoid the secondary fracture. Can do. Furthermore, since it is sufficient to insert one osteoclast pin, it is possible to minimize the invasion of the affected area and reduce the operation time and cost. Furthermore, in the operation, the elastic hook can be reliably protruded and retracted by rotating the hook shaft advancing drive tool (B) and the hook shaft retracting drive tool (C).
本発明の接骨ピンの材質は、生体親和性に優れ、耐疲労強度が高く、かつ適度の弾性を有するチタン合金、例えばチタン、アルミニウム、バナジウム合金等があり、このほかステンレス鋼、超合金、エンジニアリングプラスチックス等も使用される。 The material of the osteoclast pin of the present invention is a titanium alloy having excellent biocompatibility, high fatigue resistance, and moderate elasticity, such as titanium, aluminum, vanadium alloy, etc. In addition, stainless steel, superalloy, engineering Plastics etc. are also used.
図１、２の骨折治療用接骨ピン（Ａ）は、Ｔｉ−６Ａｌ−４Ｖのチタン合金製の中空軸（１）及びフック軸（２）からなり、上記中空軸（１）は、軸心に円形通孔（３）を縦通し、該通孔（３）の先端は閉じ、基端は開口した円筒状のもので、その先端部分の外周面に本例では６巻き分の右オネジ（４）を形成すると共に、該オネジ（４）部分の先端部に、上記通孔（３）の先端から中空軸（１）外側方へ分岐開通する本例では２本のフック案内孔（５）、（５ａ）を開設してある。 1 and 2 includes a hollow shaft (1) and a hook shaft (2) made of a titanium alloy of Ti-6Al-4V, and the hollow shaft (1) has an axial center. The circular through-hole (3) is vertically passed, the tip of the through-hole (3) is closed, and the base end is a cylindrical shape that is open. In this example, the right male screw (4 ) And two hook guide holes (5) in the present example branching open from the tip of the through hole (3) to the outside of the hollow shaft (1) at the tip of the male screw (4) portion, (5a) has been established.
上記２本のフック案内孔（５）、（５ａ）は中空軸（１）直径方向の相対する位置に開設され、各案内孔（５）、（５ａ）の先端がわ孔壁面を、先端がわへ傾斜する傾斜案内面（６）、（６ａ）に形成してある。 The two hook guide holes (5) and (5a) are opened at opposite positions in the diameter direction of the hollow shaft (1). The tip of each guide hole (5) and (5a) It is formed on the inclined guide surfaces (6) and (6a) which are inclined toward the side.
本例では、さらに上記案内孔（５）、（５ａ）のうち一方（５ａ）の位置を他方（５）よりも図２に示すように若干先端がわへずらしている。 In this example, the position of one (5a) of the guide holes (5) and (5a) is slightly shifted from the other (5) as shown in FIG.
なお、上記中空軸（１）の通孔（３）の基端寄り内周面には、図２に示すように、後述のフック軸進出駆動具を接続するための右メネジ（７）を形成し、又上記中空軸（１）の基端面には、図１、図３（ハ）に示すように後述のフック軸後退駆動具を装着する際の回り止め係止溝（８）、（８）を直径方向相対する位置に設けてある。 As shown in FIG. 2, a right female screw (7) for connecting a hook shaft advancing drive tool to be described later is formed on the inner peripheral surface near the base end of the through hole (3) of the hollow shaft (1). In addition, as shown in FIGS. 1 and 3C, the base end surface of the hollow shaft (1) is provided with a non-rotating locking groove (8), ) Are provided at positions opposite to each other in the diameter direction.
上記フック軸（２）は、上記中空軸（１）の通孔（３）内に摺動自在に嵌合可能の円形ロッド（９）を有し、該ロッド（９）の先端面から、本例では２つ割の溝を介して、該ロッド（９）とほぼ同長で、先端部分を適宜外方へ孤状に回曲した２本のフック（１０）、（１０ａ）を延出してある。 The hook shaft (2) has a circular rod (9) that can be slidably fitted in the through hole (3) of the hollow shaft (1). In the example, two hooks (10) and (10a) are extended through a groove that is approximately the same length as that of the rod (9), and the tip portion is bent outwardly in an isolated manner. is there.
上記フック軸（２）のロッド（９）基端には、該ロッド（９）より若干小径の進退従動ピン（１１）を同心的に延出し、該従動ピン（１１）の外周面に、後述のフック軸後退具を螺合するための右オネジ（１２）を設けてある。 A forward / backward driven pin (11) having a slightly smaller diameter than the rod (9) extends concentrically at the base end of the rod (9) of the hook shaft (2), and the outer peripheral surface of the driven pin (11) is described later. A right male screw (12) for screwing the hook shaft retractor is provided.
上記のようなフック軸（２）の両フック（１０）、（１０ａ）を狭搾状態に弾性変形させて上記中空軸（１）の通孔（３）内に開口基端から圧入し、ついで一方のフック（１０）の先端部分を上記案内孔（５）の傾斜案内面（６）に、他方のフック（１０ａ）の先端部分を上記案内孔（５ａ）の傾斜案内面（６ａ）にそれぞれ当接して待機状態におく。 Both the hooks (10) and (10a) of the hook shaft (2) as described above are elastically deformed in a squeezed state and press-fitted into the through hole (3) of the hollow shaft (1) from the opening base end, The tip of one hook (10) is on the inclined guide surface (6) of the guide hole (5), and the tip of the other hook (10a) is on the inclined guide surface (6a) of the guide hole (5a). Abut and stand by.
上記待機状態において、上記フック軸（２）を前方へ押せば、各フック（１０）、（１０ａ）が上記傾斜案内面（６）、（６ａ）に沿って回曲しつつ図２のように外側方へ突出し、その際、本例では、一方のフック（１０ａ）が他方（１０）よりも若干先端がわに突出位置をとることとなる。 When the hook shaft (2) is pushed forward in the standby state, the hooks (10) and (10a) are turned along the inclined guide surfaces (6) and (6a) as shown in FIG. In this example, one of the hooks (10a) is slightly protruded from the other (10).
本例では、上記フック（１０）、（１０ａ）を上記案内孔（５）、（５ａ）から最大長突出させたとき、該フック（１０）、（１０ａ）の張り出し径（ｄ）、（ｄａ）（図２参照）が等しくなるように、予め他方のフック（１０ａ）の長さを一方のフック（１０）よりも若干長くしておく。 In this example, when the hooks (10), (10a) are projected from the guide holes (5), (5a) to the maximum length, the projecting diameters (d), (da) of the hooks (10), (10a) ) (Refer to FIG. 2), the length of the other hook (10a) is made slightly longer than that of the one hook (10) in advance.
上例の接骨ピン（Ａ）の作用を大腿骨骨折の接骨治療に使用した例とともに次に説明する。図４において、大腿骨の骨頭（Ｔ）の頸部に生じた骨折線（Ｘ）で示される骨折部に対し、ドリルにより大転子（Ｍ）の下側位置から骨内部へ切りこみ、厚地硬質の皮質骨（Ｎ）の内側に接して骨頭（Ｔ）頂部の薄い皮質骨近くまで直線的に延長する直線孔を形成する。 Next, the action of the above osteoclast pin (A) will be described together with an example in which it is used for osteoclast treatment of a femoral fracture. In FIG. 4, the fractured portion indicated by the fracture line (X) generated in the neck of the femoral head (T) is cut into the bone from the lower position of the greater trochanter (M) with a drill, A straight hole extending linearly to the vicinity of the thin cortical bone at the top of the head (T) is formed on the inside of the cortical bone (N).
次に、上記直線孔内に本発明の接骨ピン（Ａ）を、図１（ハ）のようにフック（１０）、（１０ａ）を後退させた状態で、回転させながら挿入する。 Next, the osteoclast pin (A) of the present invention is inserted into the straight hole while rotating with the hooks (10) and (10a) retracted as shown in FIG.
次に、図３（イ）に示すように、上記中空軸（１）の従動ピン（１１）が挿通可能の通孔（ｂ）を縦通された円筒であって、その先端部に、上記中空軸（１）のメネジ（７）と螺合可能の接続用右オネジ（ｃ）を、その後端部に螺進用右メネジ（ｄ）をそれぞれ設けた案内筒（ａ）と、上記案内筒（ａ）のメネジ（ｄ）と螺合された螺進用右オネジ軸（ｆ）の前端に、上記案内筒（ａ）内に摺動自在に挿入された押し棒（ｇ）を、後端に回しハンドル（ｈ）をそれぞれ突設した押し駆動部（ｅ）とからなるフック軸進出駆動具（Ｂ）を使用して以下の作業を行う。 Next, as shown in FIG. 3 (a), the hollow shaft (1) is a cylinder vertically inserted through the through hole (b) through which the driven pin (11) can be inserted, A guide cylinder (a) provided with a female screw (7) that can be screwed with a female screw (7) of the hollow shaft (1) and a right female screw (d) for screwing at the rear end thereof; A push rod (g) slidably inserted into the guide tube (a) is inserted into the rear end of the front male screw shaft (f) screwed with the female screw (d) of (a). The following operations are performed using the hook shaft advancing drive tool (B) including the push drive parts (e) each having a handle (h) projectingly turned.
上記案内筒（ａ）先端の接続用オネジ（ｃ）を、上記接骨ピン（Ａ）の中空軸（１）後端の接続用メネジ（７）に螺合すると共に、該案内筒（ａ）の通孔（ｂ）内に、上記接骨ピン（Ａ）のフック軸（２）後端の従動ピン（１１）を挿入させる。その状態で、上記案内筒（ａ）を把持しつつハンドル（ｈ）を右回し（矢印）してオネジ軸（ｆ）を右回転させ、それにより押し棒（ｇ）が案内筒（ａ）内を前進して上記従動ピン（１１）を前方へ押し、上記フック軸（２）を前進させてフック（１０）、（１０ａ）を図４に示すように案内孔（５）、（５ａ）から外側方へ突出させる。両フック（１０）、（１０ａ）は海綿骨（Ｓ）内に刺し入りつつ硬い皮質骨に達する。 The connection male screw (c) at the tip of the guide tube (a) is screwed into the connection female screw (7) at the rear end of the hollow shaft (1) of the osteoclast pin (A), and the guide tube (a) The driven pin (11) at the rear end of the hook shaft (2) of the osteosynthesis pin (A) is inserted into the through hole (b). In this state, while gripping the guide tube (a), the handle (h) is rotated clockwise (arrow) to rotate the male screw shaft (f) clockwise, whereby the push rod (g) is moved into the guide tube (a). Is moved forward, the driven pin (11) is pushed forward, the hook shaft (2) is advanced, and the hooks (10), (10a) are moved from the guide holes (5), (5a) as shown in FIG. Project outward. Both hooks (10), (10a) reach hard cortical bone while piercing into the cancellous bone (S).
この場合、上記接骨ピン（Ａ）が図４のように厚地硬質の皮質骨（Ｎ）に接して差しこまれているため、該接骨ピン（Ａ）の先端部が、断面ほぼ円形の骨頭の偏心点を通る線上にあって、接骨ピン（Ａ）先端を骨頭皮質骨の円弧状内面に斜めに対向することとなるが、上記両フック（１０）、（１０ａ）が互に突出位置を前後に若干ずらしているので、両フック（１０）、（１０ａ）とも骨頭皮質骨に係止できることとなる。 In this case, since the osteoclast pin (A) is inserted in contact with the thick hard cortical bone (N) as shown in FIG. 4, the distal end portion of the osteoclast pin (A) has a substantially circular cross-section. It is on a line passing through the eccentric point, and the tip of the osteoclast pin (A) is diagonally opposed to the arcuate inner surface of the bony head cortical bone, but both the hooks (10), (10a) move forward and backward from each other. Therefore, both hooks (10) and (10a) can be locked to the cortical bone of the head.
上記のように接骨ピン（Ａ）を骨折部に装着すれば、該接骨ピン（Ａ）は、オネジ（４）により抜け止め状態に、又両フック（１０）、（１０ａ）により回転不能状態にそれぞれ保持されて、骨折部を確実に固定することができる。 When the osteoclast pin (A) is attached to the fracture as described above, the osteoclast pin (A) is prevented from being detached by the male screw (4), and cannot be rotated by the both hooks (10) and (10a). Each of them is held and the fracture portion can be fixed securely.
骨折部の治癒後接骨ピン（Ａ）を抜去する場合は、図３（ロ）、（ハ）に示すように、上記中空軸（１）とほぼ同径で、通孔（ｊ）を縦通された円筒であって、その開口先端面に、上記中空軸（１）後端面の回り止め係止溝（８）、（８）と係止可能の回り止め係止突起（ｋ）、（ｋ）を有する案内筒（ｉ）と、上記案内筒（ｉ）の通孔（ｊ）内に摺動自在に挿入された引きロッド（ｍ）の前部軸心部に、上記フック軸（２）の従動ピン（１１）のオネジ（１２）と螺合可能の螺退右メネジ（ｎ）を、後端に回しハンドル（ｐ）つきストッパーブロック（ｏ）をそれぞれ設けた引き駆動部（ｌ）とからなるフック軸後退駆動具（Ｃ）を使用して次の作業を行う。 When the osteoclast pin (A) is removed after healing of the fracture, as shown in FIGS. 3 (b) and (c), the hollow shaft (1) has the same diameter as the longitudinal axis and passes through the through hole (j). A non-rotating locking projection (k), (k) that can be locked to the rotation locking grooves (8), (8) of the rear end surface of the hollow shaft (1). ) And a hook shaft (2) on a front shaft center portion of a pull rod (m) slidably inserted into a through hole (j) of the guide tube (i). A pulling drive portion (l) provided with a stopper block (o) with a handle (p) by turning a screwed right female screw (n) which can be screwed with a male screw (12) of the driven pin (11) of the follower pin (11). The following operation is performed using the hook shaft retreat drive tool (C).
上記引きロッド（ｍ）の螺退メネジ（ｎ）を、上記接骨ピン（Ａ）の従動ピン（１１）のオネジ（１２）後端部分に螺合すると共に、上記回り止め係止突起（ｋ）、（ｋ）を上記接骨ピン（Ａ）後端の回り止め係止溝（８）、（８）にそれぞれ係止し、その状態で、案内筒（ｉ）を把持しつつハンドル（ｐ）を右回しし、それにより回転する引きロッド（ｍ）の螺退メネジ（ｎ）により接骨ピン（Ａ）の従動ピン（１１）を後方へ引き、上記フック軸（２）を後退させてフック（１０）、（１０ａ）を図１（ハ）のように案内孔（５）、（５ａ）内に引っこませる。ついで接骨ピン（Ａ）を左回転させつつ骨から抜去する。 The threaded female screw (n) of the pulling rod (m) is screwed into the rear end portion of the male screw (12) of the driven pin (11) of the osteoclast pin (A), and the detent locking projection (k) , (K) are respectively locked in the anti-rotation locking grooves (8), (8) at the rear end of the bone pin (A), and in this state, the handle (p) is held while holding the guide tube (i). By turning clockwise, the driven pin (11) of the osteoclast pin (A) is pulled backward by the screwing female screw (n) of the pulling rod (m) rotating thereby, and the hook shaft (2) is retracted to move the hook (10 ) And (10a) are pulled into the guide holes (5) and (5a) as shown in FIG. Next, the osteoclast pin (A) is extracted from the bone while rotating counterclockwise.
Ａ 接骨ピン
Ｂ フック軸進出駆動具
Ｃ フック軸後退駆動具
１ 中空軸
２ フック軸
３ 通孔
４ オネジ
５、５ａ フック案内孔
１０、１０ａ 弾性フック
A Bone pin B Hook shaft advance drive tool C Hook shaft retraction drive tool 1
Claims (1)
上記中空軸（１）の通孔（３）基端部内周面に、上記フック軸進出駆動具（Ｂ）接続用のメネジ（７）を設けると共に、上記フック軸（２）の基端に、該フック軸より小径で外周面にオネジ（１２）を有する進退従動ピン（１１）を同心的に延出し、
上記フック軸進出駆動具（Ｂ）は、上記従動ビン（１１）が挿通されるべき通孔（ｂ）を縦通された案内筒（ａ）の先端部に、上記中空軸（１）のメネジ（７）と螺合すべき接続用オネジ（ｃ）を、案内筒（ａ）の後端部に螺進用メネジ（ｄ）をそれぞれ設け、この案内筒（ａ）内に螺進用オネジ軸（ｆ）を、上記螺進用メネジ（ｄ）と螺合状態で、挿入し、該螺進用オネジ軸（ｆ）の前端に押し棒（ｇ）を、後端に回しハンドル（ｈ）をそれぞれ突設してなり、
上記フック軸後退駆動具（Ｃ）は、通孔（ｊ）を縦通された案内筒（ｉ）内に引きロッド（ｍ）を摺動自在に挿入し、該引きロッド（ｍ）の前部軸心部に、上記フック軸（２）の従動ピン（１１）と螺合すべき螺退用メネジ（ｎ）を、引きロッド（ｍ）の後端に回しハンドル（Ｐ）をそれぞれ設け、さらに上記案内筒（ｉ）の先端部と上記中空軸（１）の後端部を回転不能に一体化すべき回り止め係止手段を備えてなる、
骨折治療用接骨ピン装置。 A male screw (4) is formed on the outer peripheral surface of the distal end portion of the hollow shaft (1) vertically passed through the through hole (3) at the shaft center, and the through hole (3) is formed at the distal end of the hollow shaft (1 ). A hook shaft having a plurality of hook guide holes branched and opened outward from the hollow shaft (1) and having a plurality of appropriately long elastic hooks at the tip in the through hole (3) of the hollow shaft (1) (2) a bone treatment pin for fracture treatment (A) inserted in such a manner as to be able to advance and retreat in the axial direction; a hook shaft advancing drive tool (B) for projecting the hook outward from the hook guide hole; A hook shaft retraction drive tool (C) for retreating into the hook guide hole,
A female screw (7) for connecting the hook shaft advancement drive tool (B) is provided on the inner peripheral surface of the through hole (3) of the hollow shaft (1), and at the base end of the hook shaft (2), An advancing / retracting pin (11) having a smaller diameter than the hook shaft and having an external thread (12) on the outer peripheral surface extends concentrically,
The hook shaft advancing drive tool (B) includes a female screw of the hollow shaft (1) at the tip of the guide tube (a) vertically passed through the through hole (b) through which the driven bin (11) is to be inserted. (7) A connecting male screw (c) to be screwed and a female screw (d) for screwing are provided at the rear end of the guide tube (a), and a screwing screw shaft is provided in the guide tube (a). (F) is inserted into the threaded female screw (d) in a screwed state, the push rod (g) is turned to the front end of the male screw shaft (f), and the handle (h) is turned to the rear end. Each projecting
The hook shaft retraction drive tool (C) has a pull rod (m) slidably inserted into a guide tube (i) vertically passed through a through hole (j), and a front portion of the pull rod (m). At the shaft center, a female screw (n) to be screwed with the driven pin (11) of the hook shaft (2) is turned to the rear end of the pulling rod (m), and a handle (P) is provided. A detent locking means for integrating the front end of the guide tube (i) and the rear end of the hollow shaft (1) in a non-rotatable manner;
Bone fracture pin device for fracture treatment.
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| ES2706201T3 (en) * | 2013-10-22 | 2019-03-27 | General Surgical Company India Pvt Ltd | A device for bone support with improved rotational stability |
| JP6420787B2 (en) * | 2015-04-22 | 2018-11-07 | 学校法人順天堂 | Fracture fixation device |
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