JP2011115515A

JP2011115515A - Drill guide with drill stopper drawn on this side

Info

Publication number: JP2011115515A
Application number: JP2009288396A
Authority: JP
Inventors: Jun Okada; 順岡田
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-12-01
Filing date: 2009-12-01
Publication date: 2011-06-16

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drill guide with a drill stopper drawn on this side, having an excessive drilling inhibit function not to damage facing blood vessel and nerve when frilling a bore in a bone in osteosynthesis in orthopedics. <P>SOLUTION: A guide cylinder (2) of the drill guide (1) is provided with an outer cylinder drill stopper (3), a small projection (4) is provided on the surface of the guide cylinder, and the outer cylinder drill stopper (3) is provided with axial slit-like windows (5) drawn on this side and moved along the small projection (4) and sideslipping slit windows (6) sideslipping the small projection (4) to define a length, which are arranged at intervals of several millimeters. In this configuration, an overlap length of the guide cylinder (2) and the outer cylinder drill stopper (3) can be controlled and fixed by units of several millimeters, so that it is possible to provide the drill guide with drill stopper drawn on this side having an excessive drilling inhibit function. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、整形外科での骨折などに対する骨接合手術用のドリル誘導器具として、過剰ドリリング抑止機能すなわちドリルストッパー機能を備えた手前引き出し型ドリルストッパー付きドリルガイドに関するものである。 The present invention relates to a drill guide with a front pull-out type drill stopper having a function of preventing excessive drilling, that is, a drill stopper function, as a drill guiding instrument for osteosynthesis for fractures in orthopedics.

従来の整形外科での骨折手術時に骨穿孔ドリルするときに、周囲の組織を保護したり、ドリル軸を定める目的でドリルガイドが使用されてきた。そうしたドリルガイドに過剰ドリリング抑止機能を備えたものは種々存在するが、手前引き出し型ドリルストッパー付きドリルガイドはこれまで使われていないようである。 A drill guide has been used for the purpose of protecting surrounding tissues and defining a drill axis when performing a bone drilling drill in a conventional orthopedic fracture operation. There are various types of such drill guides having a function of preventing excessive drilling, but it seems that a drill guide with a front-drawing type drill stopper has not been used so far.

ドリルガイドに過剰ドリリング抑止機能を備えるために、そのドリルガイドの誘導筒の同軸にドリルストッパー用の筒を設ける。そして、長管骨の骨穿孔ドリル時にドリル先端によって手前の皮質骨を貫きドリル抵抗は弱まったのち、対面の皮質骨に達してドリル抵抗が再び強くなった時点で、ドリルストッパー用の筒を手前に引き出して長さを調節して留めるようにしてドリル進行距離を制御する。そのような手前引き出し型ドリルストッパー付きドリルガイドを提供しようとするものである。 In order to provide the drill guide with an excessive drilling suppression function, a drill stopper cylinder is provided coaxially with the guide cylinder of the drill guide. Then, when drilling a long bone, the drill tip penetrates the cortical bone in front and the drill resistance is weakened. The drill travel distance is controlled by adjusting the length by pulling it out. It is an object of the present invention to provide a drill guide with such a front-drawing type drill stopper.

図１、図２、図３、図４、図５に示すように、ドリルガイド（１）の誘導筒（２）にあわせて同軸にさらに外筒ドリルストッパー（３）を設け、誘導筒表面には小突起（４）を設け、外筒ドリルストッパー（３）には手前引き出しして長さを調節できるように小突起（４）にそって移動できる軸方向のスリット状の窓（５）と、小突起（４）を横滑りして長さを規定する横滑りスリット窓（６）を数ｍｍ間隔で設ける。これらの機構によって、ドリルガイド（１）の誘導筒（２）と外筒ドリルストッパー（３）を重ね合わせた長さは数ｍｍ単位で調節固定できる。ドリル軸（７）はドリル本体（８）に接続されており、その接続部からドリル先端（９）までの長さからドリルガイドの誘導筒（２）と外筒ドリルストッパー（３）を重ね合わせた長さを差し引いた距離以上にはドリル先端（９）は進行しない。それによってドリル進行距離の制御機能すなわち過剰ドリリング抑止機能を備えることができる。 As shown in FIGS. 1, 2, 3, 4, and 5, an outer cylinder drill stopper (3) is provided coaxially with the guide cylinder (2) of the drill guide (1), and is provided on the surface of the guide cylinder. Is provided with a small projection (4), and an axial slit-like window (5) which can be moved along the small projection (4) so that the length can be adjusted by pulling out toward the outer cylinder drill stopper (3). Side slip slit windows (6) for regulating the length by sliding the small protrusions (4) are provided at intervals of several mm. By these mechanisms, the length in which the guide tube (2) of the drill guide (1) and the outer tube drill stopper (3) are overlapped can be adjusted and fixed in units of several mm. The drill shaft (7) is connected to the drill body (8), and the guide tube (2) of the drill guide and the outer cylinder drill stopper (3) are overlapped from the length from the connecting part to the drill tip (9). The drill tip (9) does not advance beyond the distance obtained by subtracting the length. Thereby, it is possible to provide a drill travel distance control function, that is, an excessive drilling suppression function.

なお、ドリルガイドの取っ手（１０）は、外筒ドリルストッパー（３）の滑走の支障にならぬように、ドリルガイドの誘導筒（２）の先端近くに設ける。 The handle (10) of the drill guide is provided near the tip of the guide tube (2) of the drill guide so as not to hinder the sliding of the outer tube drill stopper (3).

図３のように、長管骨の断面（１１）は管状の皮質骨とその内腔からなっており、ドリル先端（９）によって手前の皮質骨（１２）を貫いたあとドリル抵抗は弱まり、対面の皮質骨（１３）に達するとドリル抵抗がやや強くなる。その時点で図４のようにドリル先端（９）の進行距離を数ｍｍの対面の皮質骨（１３）の深さ分を残した状態で、ドリルガイド（１）の誘導筒（２）に対して外筒ドリルストッパー（３）を手前に引き出して長さを調節し、誘導筒（２）の小突起（４）を外筒ドリルストッパー（３）の横滑りスリット窓（６）に移動するようにして長さを固定することによって、ドリル先端（９）は数ｍｍ以上は進行しないことになる。それによって過剰ドリリング抑止機能がえられる。そこで、さらに図５のようにドリリングをすすめ、長管骨の対面の骨皮質（１３）を貫いた直後に、神経、血管、筋腱組織などを損傷することなくドリル先端（９）を停止させることができる。 As shown in FIG. 3, the cross section (11) of the long bone is composed of a tubular cortical bone and its lumen, and the drill resistance is weakened after penetrating the front cortical bone (12) by the drill tip (9). When reaching the cortical bone (13) facing, the drill resistance becomes slightly stronger. At that time, with respect to the guide tube (2) of the drill guide (1), the advance distance of the drill tip (9) remains as much as the depth of the facing cortical bone (13) of several mm as shown in FIG. Pull out the outer cylinder drill stopper (3) and adjust the length so that the small protrusion (4) of the guide cylinder (2) moves to the skid slit window (6) of the outer cylinder drill stopper (3). By fixing the length, the drill tip (9) does not advance more than a few mm. As a result, an excessive drilling suppression function is obtained. Therefore, drilling is further performed as shown in FIG. 5, and immediately after penetrating the bone cortex (13) facing the long bone, the drill tip (9) is stopped without damaging nerves, blood vessels, muscle tendon tissue, and the like. be able to.

本発明の骨穿孔ドリル開始前の外観図External view before start of bone drilling drill of the present invention 本発明の誘導筒に外筒ドリルストッパーを手前に引き出して重ね合わせ、長さを調節した外観図External view of the guide cylinder of the present invention with the outer cylinder drill stopper pulled out and overlapped to adjust the length 本発明を用いて骨穿孔ドリルし手前の皮質骨を貫き、対面の皮質骨に達した断面図Cross-sectional view of the cortical bone in the opposite direction, drilled through the frontal cortical bone using the present invention 本発明を用いて骨穿孔ドリルし対面の皮質骨に達し、誘導筒に外筒ドリルストッパーを手前に引き出して重ね合わせ、長さを調節した断面図Cross-sectional view of adjusting the length by drilling a bone using the present invention to reach the cortical bone facing and pulling the outer cylinder drill stopper forward on the guide cylinder 本発明を用いて骨穿孔ドリルし、対面の皮質骨を貫いた直後にドリル先端が停止した断面図Sectional view in which the drill tip stopped immediately after drilling a bone using the present invention and penetrating the cortical bone facing each other

以下、本発明の実施の形態を図１、図２、図３、図４、図５に基づいて説明する。 Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1, 2, 3, 4, and 5.

ドリルガイド（１）の誘導筒（２）にあわせて同軸にさらに外筒ドリルストッパー（３）を設け、誘導筒表面には小突起（４）を設け、外筒ドリルストッパー（３）には手前引き出しして長さを調節できるように小突起（４）にそって移動できる軸方向のスリット状の窓（５）と、小突起（４）を横滑りして長さを規定する横滑りスリット窓（６）を数ｍｍ間隔で設ける。これらの機構によって、ドリルガイド（１）の誘導筒（２）に対して外筒ドリルストッパー（３）を手前に引き出して長さを調節し、誘導筒の小突起（４）を外筒ドリルストッパーの横滑りスリット窓（６）に移動するようにして、誘導筒（２）と外筒ドリルストッパー（３）を重ね合わせた長さは数ｍｍ単位で調節固定できる。ドリル軸（７）はドリル本体（８）に接続されており、その接続部からドリル先端までの長さからドリルガイドの誘導筒（２）と外筒ドリルストッパー（３）を重ね合わせた長さを差し引いた距離以上にはドリルは進行しない。それによってドリル進行距離の制御機能すなわち過剰ドリリング抑止機能を備えることができる。 An outer cylinder drill stopper (3) is provided coaxially with the guide cylinder (2) of the drill guide (1), a small protrusion (4) is provided on the surface of the guide cylinder, and the outer cylinder drill stopper (3) is in front. A slit-like window (5) in the axial direction that can be moved along the small protrusion (4) so that the length can be adjusted by pulling it out, and a side-sliding slit window (sliding the small protrusion (4) to define the length) 6) is provided at intervals of several mm. With these mechanisms, the outer cylinder drill stopper (3) is pulled out toward the guide cylinder (2) of the drill guide (1) to adjust the length, and the small protrusion (4) of the guide cylinder is adjusted to the outer cylinder drill stopper. The length of the overlapping of the guide tube (2) and the outer tube drill stopper (3) can be adjusted and fixed in units of several mm so as to move to the side sliding slit window (6). The drill shaft (7) is connected to the drill body (8), and the length from the connecting portion to the tip of the drill overlaps the guide cylinder (2) of the drill guide and the outer cylinder drill stopper (3). The drill will not proceed beyond the distance minus. Thereby, it is possible to provide a drill travel distance control function, that is, an excessive drilling suppression function.

１ドリルガイド
２誘導筒
３外筒ドリルストッパー
４小突起
５軸方向のスリット状の窓
６横滑りスリット窓
７ドリル軸
８ドリル本体
９ドリル先端
１０取っ手
１１長管骨の断面
１２手前の骨皮質
１３対面の骨皮質DESCRIPTION OF SYMBOLS 1 Drill guide 2 Guide cylinder 3 Outer cylinder drill stopper 4 Small protrusion 5 Axial slit-like window 6 Side-sliding slit window 7 Drill shaft 8 Drill body 9 Drill tip 10 Handle 11 Cross section of long bone 12 Front bone cortex 13 Face to face Bone cortex

Claims

Drill guide with front pull-out type drill stopper that controls the drill travel distance by providing a drill stopper cylinder coaxially with the guide cylinder of the drill guide and pulling it forward to adjust the length.