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Experiments for the Development of a Steerable Microcatheter

  • Laboratory Investigation
  • Published:
CardioVascular and Interventional Radiology Aims and scope Submit manuscript

Abstract

Purpose

Sumitomo Bakelite has developed a steerable microcatheter with a mechanism on the handle for changing the direction of the catheter tip. Experiments were conducted in an animal model to evaluate the practicality of the catheter with the goal of introduction into clinical use.

Materials and Methods

The steerable microcatheter has the following specifications: external diameter 2.4F/2.9F (distal/proximal portion); internal diameter 0.021 inches; effective length 125 cm; and it is fitted with a dial on the proximal portion for moving the tip. Five interventional radiologists evaluated the microcatheter in animal experiments using piglets. The test catheter was compared with commercial straight microcatheters based on procedure time required to insert the catheter into two prescribed patterns of arterial branching (P-1: hepatic artery, P-2: iliac artery), fluoroscopy time, amount of contrast agent used, and frequency of guidewire use. Furthermore, the renal arteries into which each catheter was inserted were excised and examined for the extent of vascular damage.

Results

Compared to the commercial products, the steerable microcatheter used without a guidewire required shorter procedure time (43.0/75.2% reductions in P-1/P-2), fluoroscopy time tended to be shorter (5.1/74.1% reductions), and the amount of contrast agent used tended to be lower (38.2/52.3% reductions). No damage was seen to the luminal surface of the renal arteries traversed by either microcatheter. During the experiment, there were no problems or defects with either microcatheter while intravascular procedure.

Conclusion

These animal experiments confirmed that the steerable microcatheter had the functionality required for its development as a commercial medical device.

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Acknowledgements

This study was supported by Sumitomo Bakelite Co., Ltd..

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Authors and Affiliations

  1. Department of Diagnostic and Interventional Radiology, Aichi Cancer Center Hospital, 1-1 Kanokoden, Chikusa-ku, Nagoya, Aichi, 464-8681, Japan

    Yoshitaka Inaba

  2. Department of Diagnostic Radiology, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan

    Yasuaki Arai & Miyuki Sone

  3. Division of Interventional Radiology, Shizuoka Cancer Center, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Sizuoka, 411-8777, Japan

    Takeshi Aramaki

  4. Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan

    Keigo Osuga

  5. Sumitomo Bakelite Co., Ltd, 2-5-8 Higashishinagawa, Shinagawa-ku, Tokyo, 140-0002, Japan

    Hayao Tanaka & Kenichi Kanemasa

Authors
  1. Yoshitaka Inaba
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  2. Yasuaki Arai
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  3. Miyuki Sone
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  4. Takeshi Aramaki
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  5. Keigo Osuga
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  6. Hayao Tanaka
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  7. Kenichi Kanemasa
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Corresponding author

Correspondence to Yoshitaka Inaba.

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Conflict of interest

All authors declare that they received financial assistance from Sumitomo Bakelite Co., Ltd. in this experiment.

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Cite this article

Inaba, Y., Arai, Y., Sone, M. et al. Experiments for the Development of a Steerable Microcatheter. Cardiovasc Intervent Radiol 40, 1921–1926 (2017). https://doi.org/10.1007/s00270-017-1789-8

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  • DOI: https://doi.org/10.1007/s00270-017-1789-8

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