JP2017205557A - はんだ付け可能な線形弾性ニッケル−チタン先端部を有するガイドワイヤ装置、およびその製造方法 - Google Patents
はんだ付け可能な線形弾性ニッケル−チタン先端部を有するガイドワイヤ装置、およびその製造方法 Download PDFInfo
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Abstract
Description
本出願は2011年6月29日に出願した米国特許出願第13/172,278号に基づく優先権を主張するものであり、その出願明細書の全体は本出願に参照され組み入れられる。
このような要求に応えるため、ガイドワイヤのコア部材(すなわち、ワイヤ体)を形成するのにNi−Ti合金などの超弾性材料および高強度材料が使用されている。
本発明の実施態様をさらに具体的に説明するにあたり、以下の添付図面を使用する。
本開示は、ガイドワイヤ装置およびその製造方法を記述する。ここに開示するガイドワイヤ装置は、変形に際して応力誘起マルテンサイトの出現を伴わない線形擬弾性挙動を呈する線形擬弾性ニッケル−チタン(Ni−Ti)合金から形成された形付け可能な先端部を有する細長いシャフト部材を備える。非線形擬弾性(すなわち、超弾性)Ni−Ti合金からはっきり区別される線形擬弾性Ni−Ti合金は、高い耐久性と耐食性を有するとともに比較的高い剛性を有する。線形擬弾性Ni−Tiは、体温(たとえば、約37℃)においてマルテンサイト相の状態にある。これと対照的に、医療器具に使用される超弾性Ni−Tiは、典型的には、体温においてオーステナイト相の状態にあるように製造されるものであり、応力を受けるとオーステナイトからマルテンサイトへの相変態をする。形付け可能な先端部は使用者により形付けが可能であり、それによって蛇行性の解剖学的構造を通るガイドワイヤの案内が容易になる。加えて、線形擬弾性Ni−Ti合金は、ステンレス鋼などの他の形付け可能な先端用材料よりも耐久性の高い先端用材料である。そのため、例えば、施術者は一本のワイヤを用いて複数の炎症部を治療することができ、コストや手技時間の削減につながる可能性がある。
本発明の一実施態様において、形付け可能なガイドワイヤ装置を説明する。このガイドワイヤ装置は、基端部とはんだ材を施した形付け可能な先端部とを有する細長いシャフト部材を備える。前記形付け可能な先端部は、冷間加工により付与された線形擬弾性変形挙動を示す冷間加工した線形ニッケル−チタン合金を含む。前記形付け可能なガイドワイヤ装置は、さらに、少なくとも前記形付け可能な先端部の周りに配置したらせんコイル部と非外傷性キャップ部とを含み、この非外傷性キャップ部は前記らせんコイル部と前記形付け可能な先端部とに取り付けられている(例えば、はんだ付けされている)。前記非外傷性キャップ部は、前記らせんコイル部と前記形付け可能な先端部とに施したはんだ材のビードから形成されてよい。本実施態様によれば、前記非外傷性キャップ部はらせんコイルと先端部とに、線形弾性ニッケル−チタン微細構造を失うことなく取り付けられている。
III. ガイドワイヤ装置の製造方法
Claims (27)
- 基端部と、線形擬弾性を示す冷間加工したニッケル−チタン合金を含み、はんだ材を施した形付け可能な先端部とを有する細長いシャフト部材と、
少なくとも前記形付け可能な先端部の周りに配置したらせんコイル部と、
前記らせんコイル部と前記形付け可能な先端部の前記はんだ材とに取り付けた非外傷性キャップ部と、
を備えた形付け可能なガイドワイヤ装置。 - 前記細長いシャフト部材はステンレス鋼、超弾性ニッケル−チタン合金、またはその組み合わせから成る、請求項1に記載の形付け可能なガイドワイヤ装置。
- 前記形付け可能な先端部が約20%〜約90%の冷間加工を示す、請求項1に記載の形付け可能なガイドワイヤ装置。
- 前記形付け可能な先端部が約40%〜約50%の冷間加工を示す、請求項1に記載の形付け可能なガイドワイヤ装置。
- 前記形付け可能な先端部が約100ksi(約690MPa)〜約300ksi(約2070MPa)の範囲内の降伏応力を有する、請求項1に記載の形付け可能なガイドワイヤ装置。
- 前記形付け可能な先端部が約150ksi(約1034MPa)〜約200ksi(約1380MPa)の範囲内の降伏応力を有する、請求項1に記載の形付け可能なガイドワイヤ装置。
- 前記線形弾性ニッケル−チタン合金は約40%〜約50%の冷間加工と約150ksi(約1034MPa)〜約225ksi(約1550MPa)の範囲内の降伏応力を示す、請求項1に記載の形付け可能なガイドワイヤ装置。
- 前記はんだ材は共融合金を含む、請求項1に記載の形付け可能なガイドワイヤ装置。
- 前記共融合金は金−スズはんだ、金−インジウムはんだ、金−ゲルマニウムはんだ、銀−スズはんだ、および銀−金−スズはんだから成る群から選ばれる、請求項7に記載の形付け可能なガイドワイヤ装置。
- 前記金−スズはんだは約80重量%(wt%)の金と約20wt%のスズとを含む、請求項8に記載の形付け可能なガイドワイヤ装置。
- 前記非外傷性キャップ部は前記らせんコイル部と前記形付け可能な先端部とにはんだ付けしたはんだ製キャップから成る、前記請求項1に記載の形付け可能なガイドワイヤ装置。
- 基端部と、第1の横断面寸法を有する先端ニッケル−チタン合金部材を含む先端部とを備えた細長いシャフト部材を製作する工程と、
前記先端部の少なくとも一部にはんだ材を施す工程と、
前記はんだ材を施した前記先端部の少なくとも一部を、第2の横断面寸法と線形擬弾性変形挙動とを呈する形付け可能な先端部を得る冷間加工する工程と、
前記形付け可能な先端部と前記形付け可能な先端部の周りに配置したらせんコイル部とを非外傷性キャップに、前記形付け可能な先端部の線形擬弾性を実質的に損失すること無しにはんだ付けする工程と、
を含むガイドワイヤ装置製造方法。 - 前記冷間加工は高力扁平化加工、スタンピング、圧延、またはカレンダー加工の少なくとも一つを含む、請求項12に記載の方法。
- 前記形付け可能な先端部は約40%〜約50%の冷間加工を示す冷間加工した微細構造を有する、請求項12に記載の方法。
- 前記形付け可能な先端部は約45%の冷間加工を示す冷間加工した微細構造を有する、請求項12に記載の方法。
- 前記第1の横断面寸法は直径が約0.08mm (about 0.08 mm round)であり、前記第2の横断面寸法は約0.065mm〜約0.008mmの範囲内である、請求項12に記載の方法。
- 前記第1の横断面寸法は直径が約0.08mm (about 0.08 mm round)であり、前記第2の横断面寸法は約0.045mmである、請求項12に記載の方法。
- 前記先端部の少なくとも一部にはんだ材を施す工程は、前記先端部の少なくとも一部を約150℃〜約350℃の範囲内の温度において、溶融したはんだ材に浸漬することを含む、請求項12に記載の方法。
- 前記先端部の少なくとも一部にはんだ材を施す工程は、前記先端部の少なくとも一部を約280℃〜約300℃の範囲内の温度において、溶融したはんだ材に浸漬することを含む、請求項12に記載の方法。
- 前記先端部の少なくとも一部に第2のはんだ被膜を施す工程をさらに含む、請求項12に記載の方法。
- 前記冷間加工した形付け可能な先端部はマルテンサイト相状態にある、請求項12に記載の方法。
- 前記マルテンサイト相は前記はんだ付け接合部を形成する際に実質的に維持される、請求項21に記載の方法。
- 前記マルテンサイト相は前記冷間加工により安定化される、請求項21に記載の方法。
- 基端部と、ニッケル−チタン合金部材を含む先端部とを有する細長いシャフト部材を得る工程と、
前記先端部の少なくとも一部を第1の横断面寸法に研削する工程と、
少なくとも前記先端部を超音波洗浄する工程と、
溶融した金属水酸化物の上層と溶融したはんだ材の下層とを含む溶融はんだ材浴に前記先端部の少なくとも一部を浸漬する工程と、
前記はんだ材を施した前記先端部の少なくとも一部を、第2の横断面寸法と線形擬弾性変形挙動を呈する形付け可能な先端部を得る冷間加工する工程と、
少なくとも前記先端部を超音波洗浄する工程と、
前記形付け可能な先端部の周りにらせんコイル部を配置する工程と、
前記形付け可能な先端部と前記らせんコイル部とを非外傷性キャップに、前記形付け可能な先端部の前記線形擬弾性を実質的に損失すること無しにはんだ付けする工程と、
を含む、形付け可能な先端部を有するガイドワイヤ装置を製造する方法。 - 前記冷間加工は絞り加工(drawing)、高力扁平化加工、スタンピング、圧延、またはカレンダー加工の少なくとも一つを含む、請求項24に記載の方法。
- 前記形付け可能な先端部は約40%〜約50%の冷間加工を示す冷間加工した微細構造を有する、請求項24に記載の方法。
- 前記溶融したはんだ材は金−スズ共融合金を含む、請求項24に記載の方法。
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EP2726138A1 (en) | 2014-05-07 |
US20130006149A1 (en) | 2013-01-03 |
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