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<meta name="DC.Title" content="Shapability, Memory, and Luminal Changes in Microcatheters after Steam Shaping: A Comparison of 11 Different Microcatheters" />
<meta name="DC.Date" content="2005-11-01" />
<meta name="DC.Publisher" content="American Journal of Neuroradiology" />
<meta name="DC.Rights" content="Copyright © American Society of Neuroradiology" />
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<meta name="DC.Description" content="PURPOSE: The purpose of this study was to compare the characteristics of shaped microcatheters, including shapability, durability, and luminal changes.

MATERIALS AND METHODS: Eleven brands of steam-shaped microcatheters and one brand of preshaped microcatheter were evaluated. There were 2 nonreinforced and 10 reinforced devices supported by coils. For evaluation of shapability, the tip angle of 6 samples of each brand were measured after steam-shaping for 20 seconds with a shaping mandrel bent at a 90° or 150° angle. The ability to maintain the shaped angle after guidewire insertion stress (durability) was compared by calculation of the change in the tip angle by using 3 samples of each brand. Luminal change after steam shaping was evaluated by calculation of narrowing rate of the smallest diameter and observation of the surface morphology of the mold of each catheter lumen by using a silicone polymer by means of a fluorescent projection method.

RESULTS: The nonreinforced microcatheters and the fiber-braided microcatheter showed higher shapability than the others. The degree of distal microcatheter straightening with the microguidewire insertion was less pronounced in the preshaped microcatheter and the fiber-braided microcatheter. Spontaneous recovery to the initial tip angle 5 minutes after the guidewire procedure was observed in 10 brands to various degrees (87%–98%). Irregular luminal surface morphology at the angled portion was found in 6 reinforced brands. One nonreinforced catheter and the fiber-braided catheter showed high narrowing rates &gt;6%.

CONCLUSION: There are differences in shapabilty, durability, and luminal changes of steam shaping in 12 brands of microcatheters. These characteristics could be important factors in catheter choice for endovascular procedures." />
<meta name="DC.Contributor" content="Hiro Kiyosue" />
<meta name="DC.Contributor" content="Yuzo Hori" />
<meta name="DC.Contributor" content="Shunro Matsumoto" />
<meta name="DC.Contributor" content="Mika Okahara" />
<meta name="DC.Contributor" content="Syuichi Tanoue" />
<meta name="DC.Contributor" content="Yoshiko Sagara" />
<meta name="DC.Contributor" content="Hiromu Mori" />
<meta name="article:published_time" content="2005-11-01" />
<meta name="article:section" content="INTERVENTIONAL" />
<meta name="citation_title" content="Shapability, Memory, and Luminal Changes in Microcatheters after Steam Shaping: A Comparison of 11 Different Microcatheters" />
<meta name="citation_abstract" lang="en" content="&lt;p&gt;&lt;i&gt;PURPOSE:&lt;/i&gt; The purpose of this study was to compare the characteristics of shaped microcatheters, including shapability, durability, and luminal changes.&lt;/p&gt;&lt;p&gt;&lt;i&gt;MATERIALS AND METHODS:&lt;/i&gt; Eleven brands of steam-shaped microcatheters and one brand of preshaped microcatheter were evaluated. There were 2 nonreinforced and 10 reinforced devices supported by coils. For evaluation of shapability, the tip angle of 6 samples of each brand were measured after steam-shaping for 20 seconds with a shaping mandrel bent at a 90° or 150° angle. The ability to maintain the shaped angle after guidewire insertion stress (durability) was compared by calculation of the change in the tip angle by using 3 samples of each brand. Luminal change after steam shaping was evaluated by calculation of narrowing rate of the smallest diameter and observation of the surface morphology of the mold of each catheter lumen by using a silicone polymer by means of a fluorescent projection method.&lt;/p&gt;&lt;p&gt;&lt;i&gt;RESULTS:&lt;/i&gt; The nonreinforced microcatheters and the fiber-braided microcatheter showed higher shapability than the others. The degree of distal microcatheter straightening with the microguidewire insertion was less pronounced in the preshaped microcatheter and the fiber-braided microcatheter. Spontaneous recovery to the initial tip angle 5 minutes after the guidewire procedure was observed in 10 brands to various degrees (87%–98%). Irregular luminal surface morphology at the angled portion was found in 6 reinforced brands. One nonreinforced catheter and the fiber-braided catheter showed high narrowing rates &amp;gt;6%.&lt;/p&gt;&lt;p&gt;&lt;i&gt;CONCLUSION:&lt;/i&gt; There are differences in shapabilty, durability, and luminal changes of steam shaping in 12 brands of microcatheters. These characteristics could be important factors in catheter choice for endovascular procedures.&lt;/p&gt;" />
<meta name="citation_journal_title" content="American Journal of Neuroradiology" />
<meta name="citation_publisher" content="American Journal of Neuroradiology" />
<meta name="citation_publication_date" content="2005/11/01" />
<meta name="citation_mjid" content="ajnr;26/10/2610" />
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<meta name="citation_article_type" content="Research Article" />
<meta name="citation_section" content="INTERVENTIONAL" />
<meta name="citation_firstpage" content="2610" />
<meta name="citation_lastpage" content="2616" />
<meta name="citation_author" content="Hiro Kiyosue" />
<meta name="citation_author" content="Yuzo Hori" />
<meta name="citation_author" content="Shunro Matsumoto" />
<meta name="citation_author" content="Mika Okahara" />
<meta name="citation_author" content="Syuichi Tanoue" />
<meta name="citation_author" content="Yoshiko Sagara" />
<meta name="citation_author" content="Hiromu Mori" />
<meta name="twitter:title" content="Shapability, Memory, and Luminal Changes in Microcatheters after Steam Shaping: A Comparison of 11 Different Microcatheters" />
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<meta name="twitter:description" content="PURPOSE: The purpose of this study was to compare the characteristics of shaped microcatheters, including shapability, durability, and luminal changes.

MATERIALS AND METHODS: Eleven brands of steam-shaped microcatheters and one brand of preshaped microcatheter were evaluated. There were 2 nonreinforced and 10 reinforced devices supported by coils. For evaluation of shapability, the tip angle of 6 samples of each brand were measured after steam-shaping for 20 seconds with a shaping mandrel bent at a 90° or 150° angle. The ability to maintain the shaped angle after guidewire insertion stress (durability) was compared by calculation of the change in the tip angle by using 3 samples of each brand. Luminal change after steam shaping was evaluated by calculation of narrowing rate of the smallest diameter and observation of the surface morphology of the mold of each catheter lumen by using a silicone polymer by means of a fluorescent projection method.

RESULTS: The nonreinforced microcatheters and the fiber-braided microcatheter showed higher shapability than the others. The degree of distal microcatheter straightening with the microguidewire insertion was less pronounced in the preshaped microcatheter and the fiber-braided microcatheter. Spontaneous recovery to the initial tip angle 5 minutes after the guidewire procedure was observed in 10 brands to various degrees (87%–98%). Irregular luminal surface morphology at the angled portion was found in 6 reinforced brands. One nonreinforced catheter and the fiber-braided catheter showed high narrowing rates &gt;6%.

CONCLUSION: There are differences in shapabilty, durability, and luminal changes of steam shaping in 12 brands of microcatheters. These characteristics could be important factors in catheter choice for endovascular procedures." />
<meta name="og-title" property="og:title" content="Shapability, Memory, and Luminal Changes in Microcatheters after Steam Shaping: A Comparison of 11 Different Microcatheters" />
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<meta name="og-description" property="og:description" content="PURPOSE: The purpose of this study was to compare the characteristics of shaped microcatheters, including shapability, durability, and luminal changes.

MATERIALS AND METHODS: Eleven brands of steam-shaped microcatheters and one brand of preshaped microcatheter were evaluated. There were 2 nonreinforced and 10 reinforced devices supported by coils. For evaluation of shapability, the tip angle of 6 samples of each brand were measured after steam-shaping for 20 seconds with a shaping mandrel bent at a 90° or 150° angle. The ability to maintain the shaped angle after guidewire insertion stress (durability) was compared by calculation of the change in the tip angle by using 3 samples of each brand. Luminal change after steam shaping was evaluated by calculation of narrowing rate of the smallest diameter and observation of the surface morphology of the mold of each catheter lumen by using a silicone polymer by means of a fluorescent projection method.

RESULTS: The nonreinforced microcatheters and the fiber-braided microcatheter showed higher shapability than the others. The degree of distal microcatheter straightening with the microguidewire insertion was less pronounced in the preshaped microcatheter and the fiber-braided microcatheter. Spontaneous recovery to the initial tip angle 5 minutes after the guidewire procedure was observed in 10 brands to various degrees (87%–98%). Irregular luminal surface morphology at the angled portion was found in 6 reinforced brands. One nonreinforced catheter and the fiber-braided catheter showed high narrowing rates &gt;6%.

CONCLUSION: There are differences in shapabilty, durability, and luminal changes of steam shaping in 12 brands of microcatheters. These characteristics could be important factors in catheter choice for endovascular procedures." />
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      <h1 class="highwire-cite-title" id="page-title">Shapability, Memory, and Luminal Changes in Microcatheters after Steam Shaping: A Comparison of 11 Different Microcatheters</h1>  
    	<div class="highwire-cite-authors"><span  class="highwire-citation-authors"><span class="highwire-citation-author first" data-delta="0">Hiro Kiyosue</span>, <span class="highwire-citation-author" data-delta="1">Yuzo Hori</span>, <span class="highwire-citation-author" data-delta="2">Shunro Matsumoto</span>, <span class="highwire-citation-author" data-delta="3">Mika Okahara</span>, <span class="highwire-citation-author" data-delta="4">Syuichi Tanoue</span>, <span class="highwire-citation-author" data-delta="5">Yoshiko Sagara</span> and <span class="highwire-citation-author" data-delta="6">Hiromu Mori</span></span></div>
  
    	<div class="highwire-cite-metadata"><span  class="highwire-cite-metadata-journal highwire-cite-metadata">American Journal of Neuroradiology </span><span  class="highwire-cite-metadata-date highwire-cite-metadata">November 2005,  </span><span  class="highwire-cite-metadata-volume highwire-cite-metadata">26 </span><span  class="highwire-cite-metadata-issue highwire-cite-metadata">(10) </span><span  class="highwire-cite-metadata-pages highwire-cite-metadata">2610-2616; </span></div>
  
  
  
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