JP2008531191A - 改良された金属合金ステントを形成する方法 - Google Patents
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Abstract
【解決手段】医療用部材の全て又は一部を新規金属合金で形成し、該金属合金は少なくとも90重量%のモリブデン及びレニウムを含む金属合金である。
【選択図】なし
Description
以下に図面を参照し、本発明が、物理的形態およびある部品においてとる、および部品の配置をとる様々な実施の形態を説明する。
チューブを工程段階160で洗浄した後、次いで、チューブを、図1で説明するようなステントの形態に切断する。分かるように、他のステントの設計を、工程段階170で述べるような切断工程中に形成することができる。チューブの切断を、典型的にはレーザーによって行なう。チューブを加熱するために使用されたビーム強度が、少なくとも2350℃の切削温度を得ることができるように、チューブを切断するために使用されるレーザーを選択する。使用することができるレーザーの限定しない例は、パルスYAG−NDまたはCO2レーザーを含む。レーザーによるチューブの切断は、アルゴンおよび1〜10体積パーセントの水素雰囲気などの酸素還元雰囲気で行う;しかし、真空雰囲気、不活性雰囲気または他のタイプの酸素還元雰囲気を使用することができる。チューブの切断中に、チューブを、切断工程中にチューブの振動を抑制するまたは防止するように、典型的には安定させ、チューブを切断する場合、振動は、チューブ中のミクロクラックの形成をもたらす可能性がある。切断工程中のチューブに汚染物を導入しないように、チューブを、典型的には、モリブデン、レニウム、タングステン、モリブデンTZM合金、セラミックなどからなる装置によって固定する;しかし、これは必須ではない。チューブの切断の間に、振動の平均振幅は、典型的には、チューブの肉厚の約50%以下である。そのため、肉厚が、約0.0024インチであるチューブについては、切断工程中のチューブの振動の平均振幅は、約0.0012インチ以下である。
30 管状の形成体
32 第1の端部
34 第2の端部
36 第1の端部と第2の端部との間に配置された部材構造
Claims (38)
- a)表面および外径を有するロッドまたはチューブであって、少なくとも99.9重量%の固溶体からつくられている金属合金であって、炭素及び酸素を少なくとも2:1の原子比率で含む金属合金を含む前記ロッドまたはチューブを形成する工程と、
b)1回の減少機構によって前記ロッドまたはチューブの外径を25%未満減少する減少機構によって前記ロッドまたはチューブの外径を低減(draw down)する工程と、
c)前記ロッドまたはチューブの表面を洗浄する工程と、
d)前記ロッドまたはチューブの外径を50%以上低減させる前に、前記ロッドまたはチューブを焼きなます工程とを有することを特徴とする医療用部材の製造方法。 - 前記ロッドまたはチューブを形成する工程が金属粉を静水圧プレスし、次いで、前記金属粉を焼結して、前記ロッドまたはチューブを形成する工程を含む請求項1記載の方法。
- 金属粉を静水圧プレスする工程が前記金属合金の最小理論密度の0.7〜0.95の平均密度を有するロッドまたはチューブを生成する請求項2記載の方法。
- 前記静水圧プレスされた金属粉を焼結する工程が前記金属合金の最小理論密度の0.9〜0.99の平均密度を有するロッドまたはチューブを生成する請求項2または3記載の方法。
- 前記静水圧プレスされた金属粉を焼結する工程が平均密度が12〜14gm/ccのロッドまたはチューブを生成する請求項2〜4のいずれか1項記載の方法。
- 前記静水圧プレスされた金属粉を焼結させる工程を不活性雰囲気、酸素還元雰囲気または真空中で行う請求項2〜5のいずれか1項記載の方法。
- 前記金属合金がレニウム46〜49重量%、モリブデン51〜54重量%および添加金属0.5重量%以下を含み、
前記添加金属がチタン、イットリウム、ジルコニウムまたはそれらの混合物からなる群から選択される請求項1〜6のいずれか1項記載の方法。 - 前記ロッドまたはチューブの外径を減少機構によって低減させる工程が、1回の減少機構によって前記ロッドまたはチューブの外径を10%未満減少させる請求項1〜7のいずれか1項記載の方法。
- 前記減少機構がプラグ引き抜き工程を含む請求項1〜8のいずれか1項記載の方法。
- 前記ロッドまたはチューブの前記外径を低減する前記工程を不活性雰囲気、酸素還元雰囲気または真空で少なくとも部分的に行う請求項1〜9のいずれか1項記載の方法。
- ロッドまたはチューブの外径を45%以上低減する前に、前記ロッドまたはチューブを焼きなます工程を行う請求項1〜10のいずれか1項記載の方法。
- 少なくとも2分間、少なくとも1300℃の温度で、前記ロッドまたはチューブを焼きなます工程を行う請求項1〜11のいずれか1項記載の方法。
- 前記ロッドまたはチューブを焼きなます工程を不活性雰囲気、酸素還元雰囲気または真空中で少なくとも部分的に行う請求項1〜12のいずれか1項記載の方法。
- 前記表面を洗浄する工程を焼きなます前記各工程の前に行う請求項1〜13のいずれか1項記載の方法。
- 前記ロッドまたはチューブの前記外径を低減する工程の後に、前記表面洗浄工程を行う請求項1〜14のいずれか1項記載の方法。
- 前記焼きなまされたロッドまたはチューブを少なくとも部分的に前記医療用部材に切断する工程を含む請求項1〜15のいずれか1項記載の方法。
- 前記切断工程がレーザーによって少なくとも部分的である請求項16に記載の方法。
- 切断工程が前記ロッドまたはチューブを少なくとも部分的に切断するとき、前記ロッドまたはチューブを拘束して、前記ロッドまたはチューブの振動を抑制する工程を含む請求項16または17記載の方法。
- 少なくとも部分的に切断する工程を不活性雰囲気、酸素還元雰囲気または真空中で行う請求項16〜18のいずれか1項記載の方法。
- 前記切断ステップ後に、前記医療用部材を電解研磨する工程を含む請求項16〜19のいずれか1項記載の方法。
- 前記医療用部材がステント、グラフト、バルブ、ビス、爪、ロッド、PFO装置、人工器官、シース、ガイドワイヤー、バルーンカテーテル、皮下注射筒、カテーテル、電気生理学的カテーテル、止め金または切断部材である請求項1〜20のいずれか1項記載の方法。
- 前記医療用部材の少なくとも1つの領域上に、少なくとも1つの生物学的作用物質を適用する工程を含む請求項1〜21のいずれか1項記載の方法。
- 前記医療用部材の少なくとも1つの領域に少なくとも1つのポリマーを適用して、前記少なくとも1つの生物学的作用物質を少なくとも部分的に被覆し、カプセル化し、または被覆してカプセル化する工程を含む請求項22に記載の方法。
- 前記医療用部材がステントであり、肉厚が0.0027インチ未満である請求項1〜23のいずれか1項記載の方法。
- a)200メッシュ未満の平均粒子サイズを有する、少なくとも2つの異なる金属粉を選択する工程と、
b)前記金属粉を実質的に均一に混合する工程と、
c)前記金属粉をプレスし、焼結することによって前記金属粉からチューブを形成する工程であって、表面および外径を有し、少なくとも99.9重量%の固溶体からつくられている金属合金であって、炭素および酸素を少なくとも2.5:1の原子比率で含む金属合金を含む前記チューブを形成する工程と、
d)1回のプラグ引き抜き工程によって前記チューブの外径を15%未満低減させる工程と、
e)前記プラグ引き抜き工程後に前記チューブの表面を洗浄する工程と、
f)前記チューブを最後に焼結または焼きなました後、前記チューブの外径を45%以上低減する前に、前記チューブを焼きなます工程と、
g)前記焼きなまされたチューブをレーザー切断して、少なくとも部分的に医療用部材を形成する工程であって、レーザー切断中の前記チューブの振動の平均振幅が前記チューブの肉厚の50%以下であるように、前記チューブをレーザー切断中に少なくとも部分的に安定化する工程とを有することを特徴とする医療用部材を形成する方法。 - 前記金属粉をプレスする工程が、金属粉を静水圧プレスして、前記金属合金の最小理論密度の0.7〜0.95の平均密度を有するチューブを生成する工程を含む請求項25記載の方法。
- 前記焼結ステップが13〜14gm/ccの平均密度のチューブを生成する請求項25または26記載の方法。
- 前記焼結ステップを不活性雰囲気、酸素還元雰囲気または真空中で行う請求項25〜27のいずれか1項記載の方法。
- 前記金属粉の実質的均一な混合物がレニウム46〜49重量%、モリブデン51〜54重量%、および添加金属0.5重量%以下を含み、
前記添加金属がチタン、イットリウム、ジルコニウムまたはそれらの混合物からなる群から選択される請求項25〜28のいずれか1項記載の方法。 - 前記チューブの外径を低減する工程が1回の前記プラグ引き抜き工程によって前記外径を10%未満減少させ、前記チューブの外径を少なくとも部分的に低減させる工程を不活性雰囲気、酸素還元雰囲気または真空中で行う請求項25〜29に記載の方法。
- 前記チューブを焼きなます工程を不活性雰囲気、酸素還元雰囲気または真空中で、少なくとも2分間、少なくとも1300℃の温度で行う請求項25〜30のいずれか1項記載の方法。
- 前記チューブを少なくとも1回の焼きなまし工程の前に複数回低減する請求項25〜31のいずれか1項記載の方法。
- 前記表面を洗浄する工程を前記各焼きなまし工程の前に行う請求項25〜32のいずれか1項記載の方法。
- 前記焼きなまされたチューブを切断する工程を不活性雰囲気、酸素還元雰囲気または真空中で行う請求項25〜33のいずれか1項記載の方法。
- 前記レーザー切断ステップ後に、前記医療用部材を電解研磨する工程を含む請求項25〜34のいずれか1項記載の方法。
- 前記医療用部材がステントである請求項25〜35のいずれか1項記載の方法。
- 前記医療用部材の少なくとも1つの領域上に、少なくとも1つの生物学的作用物質を適用する工程を含む請求項25〜36のいずれか1項記載の方法。
- 前記医療用部材の少なくとも1つの領域に、少なくとも1つのポリマーを適用して、前記少なくとも1つの生物学的作用物質を少なくとも部分的に被覆し、カプセル化し、または被覆しカプセル化する工程を含む請求項37記載の方法。
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Application Number | Priority Date | Filing Date | Title |
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US65822605P | 2005-03-03 | 2005-03-03 | |
US60/658,226 | 2005-03-03 | ||
US69489105P | 2005-06-29 | 2005-06-29 | |
US69488105P | 2005-06-29 | 2005-06-29 | |
US60/694,881 | 2005-06-29 | ||
US60/694,891 | 2005-06-29 | ||
US73968805P | 2005-11-23 | 2005-11-23 | |
US60/739,688 | 2005-11-23 | ||
PCT/US2006/003552 WO2006096263A2 (en) | 2005-03-03 | 2006-01-30 | Process for forming an improved metal alloy stent |
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US7648591B2 (en) | 2010-01-19 |
AU2006221046B2 (en) | 2012-02-02 |
WO2006096251A2 (en) | 2006-09-14 |
JP5335244B2 (ja) | 2013-11-06 |
AU2006221058B2 (en) | 2012-02-02 |
AU2006221046A1 (en) | 2006-09-14 |
EP1858440A2 (en) | 2007-11-28 |
US7540994B2 (en) | 2009-06-02 |
WO2006096263A2 (en) | 2006-09-14 |
AU2006221046A2 (en) | 2006-09-14 |
EP1868528B1 (en) | 2024-05-22 |
EP1868528A4 (en) | 2011-04-06 |
JP2008538933A (ja) | 2008-11-13 |
AU2006221058A1 (en) | 2006-09-14 |
EP1858440B1 (en) | 2024-04-24 |
EP1858440A4 (en) | 2011-03-30 |
US20060200226A1 (en) | 2006-09-07 |
WO2006096263A3 (en) | 2007-04-05 |
US20090068249A1 (en) | 2009-03-12 |
US7488444B2 (en) | 2009-02-10 |
US20060198750A1 (en) | 2006-09-07 |
JP5068672B2 (ja) | 2012-11-07 |
WO2006096251A3 (en) | 2009-04-30 |
EP1868528A2 (en) | 2007-12-26 |
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