JP5909197B2 - 手術用具 - Google Patents
手術用具 Download PDFInfo
- Publication number
- JP5909197B2 JP5909197B2 JP2012555952A JP2012555952A JP5909197B2 JP 5909197 B2 JP5909197 B2 JP 5909197B2 JP 2012555952 A JP2012555952 A JP 2012555952A JP 2012555952 A JP2012555952 A JP 2012555952A JP 5909197 B2 JP5909197 B2 JP 5909197B2
- Authority
- JP
- Japan
- Prior art keywords
- opening portion
- filler
- bone
- small
- surgical instrument
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
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Images
Classifications
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- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
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- A—HUMAN NECESSITIES
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- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
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- A61F2310/00359—Bone or bony tissue
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- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00365—Proteins; Polypeptides; Degradation products thereof
Description
(1) 可撓性を有する袋体を備え、該袋体を骨欠損部または骨と接する部位に挿入し、その挿入状態で前記袋体の内部に充填材を充填して使用される手術用具であって、
前記袋体は、メッシュ状をなし、その目開きが大である大目開き部と、該大目開き部よりも目開きが小である小目開き部とを有し、前記充填材が未だ充填されていない自然状態で扁平形状をなし、前記充填材が充填された充填状態でも、その充填された分だけ膨張して扁平形状を維持するよう構成されており、
前記大目開き部と前記小目開き部とは、前記自然状態および前記充填状態のいずれの状態でも、目開きの大小関係は維持されていることを特徴とする手術用具。
前記大目開き部では、前記充填材の通過が許容され、前記小目開き部では、前記充填材の通過が阻止または抑制される上記(1)に記載の手術用具。
前記大目開き部の目開きおよび前記小目開き部の目開きは、それぞれ、前記複数の顆粒の平均粒径よりも小さい上記(1)に記載の手術用具。
前記袋体では、前記大目開き部は、生体吸収性を有する生体吸収部として機能する部分となり、前記小目開き部は、生体への吸収が抑止または防止された生体非吸収部として機能する部分となっており、
前記大目開き部は、前記充填状態で前記接触可能部に宛がわれ、その宛がわれた状態で前記生体吸収性を発揮し、
前記小目開き部は、前記充填状態で前記接触抑止部に宛がわれ、その宛がわれた状態で前記生体への吸収が抑止または防止される上記(1)ないし(6)のいずれかに記載の手術用具。
易になり、術後においては、経過観察が容易になる。
(11) 当該手術用具を椎体に使用する際、前記大目開き部は、前記椎体の終板骨に宛がわれ、前記小目開き部は、骨折線が生じた前記椎体の側壁を構成する骨に宛がわれる上記(1)ないし(10)のいずれかに記載の手術用具。
<第1実施形態>
図1は、本発明の手術用具の自然状態(未使用時)での第1実施形態を示す斜視図、図2は、図1に示す手術用具の使用状態の一例を示す斜視図、図3は、図2中のA−A線断面図(図1に示す手術用具の使用状態での経時的な変化を示す断面図)、図8〜図13は、それぞれ、図1に示す手術用具の使用方法を順に説明するための図である。なお、図2、図8〜図13中、紙面手前側が「頭側」、紙面奥側が「脚側」、上側が「腹側」、下側が「背側」となっている。
充填材8Aは、手術用具1に充填されるまでは粘性(流動性)を有するペースト状のものである。これにより、充填材8Aを手術用具1に容易にかつ確実に充填することができる。なお、充填材8Aの充填には、例えば図13に示すように、シリンジ10を用いることができる。また、充填材8Aとしては、特に限定されず、例えば、以下の物性(稠度)を有するものが好ましい。25℃の環境下で1[g]のペースト状の充填材8Aをガラス板上に載置し、その上から120[g]のガラス板を静かに重ねる。そして、このときに広がった充填材8Aの最大幅を有する部分の長さと最小幅を有する部分の長さとを測定し、これらの平均値を算出する。その平均値は、10〜40[mm]が好ましく、15〜30[mm]がより好ましい。
手術用具1は、袋体2と管状部3とで構成されている。
[1] まず、X線透視下で、図8に示すように、椎体圧迫骨折整復術を施す椎骨9の椎弓92、92から、椎体91に向けて穿孔器20を穿刺する。これにより、椎骨9の図8中の左右両側には、各椎弓92から椎体91内にかけて、細径の孔93、93が形成される。次に、リーマ30を用いて、各孔93の内径をそれぞれ拡径する。
図4は、本発明の手術用具(第2実施形態)の使用状態での経時的な変化を示す断面図、図5は、図4に示す手術用具に充填される充填材の粒度分布を示すグラフである。
本実施形態は、充填材の態様が異なること以外は前記第1実施形態と同様である。
図6は、本発明の手術用具(第3実施形態)を構成する線状体の使用状態での経時的な変化を示す図である。
本実施形態は、線状体の構成が異なること以外は前記第1実施形態と同様である。
図7は、本発明の手術用具の自然状態(未使用時)での第4実施形態を示す斜視図である。
これにより、マーカ部26に造影性をもたせることができ、よって、椎体91の空洞911での袋体2の設置状態をX線透視下で把握することができる。その結果、術時においては、袋体2の内部が密になるように充填材を導入することが容易になり、術後においては、経過観察が容易になる。
Claims (11)
- 可撓性を有する袋体を備え、該袋体を骨欠損部または骨と接する部位に挿入し、その挿入状態で前記袋体の内部に充填材を充填して使用される手術用具であって、
前記袋体は、メッシュ状をなし、その目開きが大である大目開き部と、該大目開き部よりも目開きが小である小目開き部とを有し、前記充填材が未だ充填されていない自然状態で扁平形状をなし、前記充填材が充填された充填状態でも、その充填された分だけ膨張して扁平形状を維持するよう構成されており、
前記大目開き部と前記小目開き部とは、前記自然状態および前記充填状態のいずれの状態でも、目開きの大小関係は維持されていることを特徴とする手術用具。 - 前記充填材は、ペースト状のものであり、
前記大目開き部では、前記充填材の通過が許容され、前記小目開き部では、前記充填材の通過が阻止または抑制される請求項1に記載の手術用具。 - 前記充填材は、複数の顆粒で構成されたものであり、
前記大目開き部の目開きおよび前記小目開き部の目開きは、それぞれ、前記複数の顆粒の平均粒径よりも小さい請求項1に記載の手術用具。 - 前記大目開き部の目開きは、前記平均粒径の0.5〜0.9倍であり、前記小目開き部の目開きは、前記平均粒径の0.05〜0.5倍である請求項3に記載の手術用具。
- 前記大目開き部の目開きは、前記小目開き部の目開きの2〜50倍である請求項1ないし4のいずれかに記載の手術用具。
- 前記大目開き部の目開きは、0.05〜9mmであり、前記小目開き部の目開きは、0.005〜5mmである請求項1ないし5のいずれかに記載の手術用具。
- 前記骨欠損部が形成された骨または骨と接する前記部位には、前記充填材とできるだけ接触させたい接触可能部と、前記充填材との接触をできるだけ抑止したい接触抑止部とがあり、
前記袋体では、前記大目開き部は、生体吸収性を有する生体吸収部として機能する部分となり、前記小目開き部は、生体への吸収が抑止または防止された生体非吸収部として機能する部分となっており、
前記大目開き部は、前記充填状態で前記接触可能部に宛がわれ、その宛がわれた状態で前記生体吸収性を発揮し、
前記小目開き部は、前記充填状態で前記接触抑止部に宛がわれ、その宛がわれた状態で前記生体への吸収が抑止または防止される請求項1ないし6のいずれかに記載の手術用具。 - 前記袋体は、前記扁平形状の厚さ方向に位置する両面側にそれぞれ前記大目開き部が配置され、前記扁平形状の側面側に前記小目開き部が配置されている請求項1ないし7のいずれかに記載の手術用具。
- 前記袋体は、X線透視下で視認可能なマーカ部を備える請求項1ないし8のいずれかに記載の手術用具。
- 前記マーカ部は、前記大目開き部と前記小目開き部との境界部に配置されている請求項9に記載の手術用具。
- 当該手術用具を椎体に使用する際、前記大目開き部は、前記椎体の終板骨に宛がわれ、前記小目開き部は、骨折線が生じた前記椎体の側壁を構成する骨に宛がわれる請求項1ないし10のいずれかに記載の手術用具。
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ITPI20120106A1 (it) * | 2012-10-19 | 2014-04-20 | Giancarlo Guizzardi | Dispositivo e sistema per artrodesi vertebrale |
CN104905868B (zh) * | 2015-06-23 | 2017-11-03 | 上海凯利泰医疗科技股份有限公司 | 一种非均匀孔径的骨填充囊袋 |
CN106214241A (zh) * | 2016-08-15 | 2016-12-14 | 江苏常美医疗器械有限公司 | 一种一体式可扩张球囊囊袋装置 |
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