JPWO2019189078A1 - 医療デバイス - Google Patents
医療デバイス Download PDFInfo
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Abstract
Description
第1実施形態に係る医療デバイス10は、急性下肢虚血や深部静脈血栓症において、血管内に挿入され、血栓、プラーク、アテローム、石灰化病変等を破壊して除去する処置に用いられる。本明細書では、デバイスの血管に挿入する側を「遠位側」、操作する手元側を「近位側」と称することとする。なお、除去する物体は、必ずしも血栓、プラーク、アテローム、石灰化病変に限定されず、生体管腔内に存在し得る物体は、全て該当し得る。
駆動デバイス100は、図1、2に示すように、ケーシング110と、回転力を発生させる駆動部120と、吸引力を発生させる吸引部130と、電池140と、スイッチ150とを備えている。
第2実施形態に係る医療デバイス200は、図7に示すように、第1のハウジング210に吸引ポート213が設けられる点で、第1実施形態に係る医療デバイス10と異なる。なお、第1実施形態と同様の機能を有する部位には、同一の符号を付し、説明を省略する。
第3実施形態に係る医療デバイス300は、図10に示すように、支持部340が第2のハウジング330を覆うことができる点で、第1、第2実施形態に係る医療デバイスと異なる。なお、第1、第2実施形態と同様の機能を有する部位には、同一の符号を付し、説明を省略する。
20 駆動シャフト
21 駆動管
25 導出部
30 外管
50、210、310 第1のハウジング
53、212、317 第1の空間部
53A、212A、317A 第1の内部空間
60、220、330 第2のハウジング
62、314 第1のシール部
62A 外側シール部
62B 内側シール部
63、222、331 第2の空間部
63A、222A、331A 第2の内部空間
64、213 吸引ポート
68、322 凹部
70、340 支持部
74、345 凸部、
214 シール用外周面
223 シール用内周面
230 第2のシール部
342 カバー部
347 支持連結部
X 軸心
Claims (10)
- 生体管腔内の物体を除去する医療デバイスであって、
回転可能である駆動シャフトと、
前記駆動シャフトの遠位部に固定されて物体を切削する切削部と、
前記駆動シャフトを回転可能に収容する第1のハウジングと、
前記第1のハウジングの遠位側に位置し、前記駆動シャフトの軸心を中心に前記第1のハウジングに対して回転可能である第2のハウジングと、
前記第1のハウジングおよび第2のハウジングを支持する支持部と、を有し、
前記第1のハウジング、第2のハウジングおよび支持部のうちの2つのどちらか一方は、凹部を有し、他方は、前記凹部に対して前記軸心に沿って相対的に移動して嵌合および離脱可能な凸部を有し、
前記凸部および凹部は、嵌合することで前記第1のハウジングおよび第2のハウジングの相対的な回転を制限し、
前記支持部は、前記第1のハウジングおよび第2のハウジングの少なくとも一方を、前記軸心を中心に回転可能に支持し、
当該支持部は、前記第1のハウジングおよび第2のハウジングの、前記軸心と交差する方向の相対的な傾きを制限する医療デバイス。 - 生体管腔内の物体を除去する医療デバイスであって、
回転可能である駆動シャフトと、
前記駆動シャフトの遠位部に固定されて物体を切削する切削部と、
前記駆動シャフトを回転可能に収容する第1のハウジングと、
前記第1のハウジングの遠位側に位置し、前記駆動シャフトの軸心を中心に前記第1のハウジングに対して回転可能である第2のハウジングと、
前記第1のハウジングおよび第2のハウジングを支持する支持部と、を有し、
前記第1のハウジングおよび第2のハウジング、または、第1ハウジングおよび支持部は、摺動可能に接触して相対的な回転を制限され、
前記支持部は、前記第1のハウジングを、前記軸心を中心に回転可能に支持し、
当該支持部は、前記第1のハウジングおよび第2のハウジングの、前記軸心と交差する方向の相対的な傾きを制限する医療デバイス。 - 前記第2のハウジングに固定され、前記駆動シャフトを回転可能に収容する外管を有する請求項1または2に記載の医療デバイス。
- 前記第1のハウジングまたは第2のハウジングは、吸引力を外部から受ける吸引ポートが形成され、
前記駆動シャフトは、少なくとも一部が管状であり、当該駆動シャフトのルーメンが前記吸引ポートと連通し、
前記吸引ポートが形成される前記第1のハウジングまたは第2のハウジングの近位部に、前記駆動シャフトの外周面と接触する第1のシール部が配置される請求項1〜3のいずれか1項に記載の医療デバイス。 - 前記第1のシール部は、
前記第1のハウジングまたは第2のハウジングと接触するリング状の外側シール部と、
前記駆動シャフトと接触するリング状の内側シール部と、を有し、
前記外側シール部は、前記内側シール部よりも柔軟であり、
前記内側シール部は、前記外側シール部の内周面に接触し、当該内側シール部は、前記外側シール部よりも摩擦抵抗が小さい請求項4に記載の医療デバイス。 - 前記第2のハウジングは、前記第1のハウジングに対して前記駆動シャフトの軸心に沿って移動可能である請求項1〜5のいずれか1項に記載の利用デバイス。
- 前記第1のハウジングは、吸引力を外部から受ける吸引ポートが形成され、
前記駆動シャフトは、少なくとも一部が管状であり、前記駆動シャフトのルーメンが前記吸引ポートと連通し、
前記第1のハウジングおよび第2のハウジングの一方は、シール用内周面を有し、他方は、前記シール用内周面に対向するシール用外周面を有し、
前記シール用内周面およびシール用外周面は、相対的に回転可能であると共に、所定の離間距離を維持しつつ前記駆動シャフトの軸心に沿って相対的に移動可能であり、
前記シール用内周面およびシール用外周面の間に、リング状の第2のシール部が配置される請求項1〜6のいずれか1項に記載の医療デバイス。 - 前記第2のハウジングは、前記第1のハウジングに対して前記駆動シャフトの軸心方向へ固定的な位置に配置される請求項1〜5のいずれか1項に記載の利用デバイス。
- 前記第1のハウジングは、吸引力を外部から受ける吸引ポートを有し、
前記支持部は、前記第2のハウジングを覆うカバー部を有し、
前記第2のハウジングは、前記カバー部に覆われることで前記支持部と共に回転可能となる請求項1〜8のいずれか1項に記載の医療デバイス。 - 前記カバー部の外周面は、前記駆動シャフトへ駆動力を伝達する駆動デバイスに連結される支持連結部を有する請求項9に記載の医療デバイス。
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WO2021199211A1 (ja) * | 2020-03-30 | 2021-10-07 | テルモ株式会社 | 医療デバイス |
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