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Influence of the marvelous™ three-way stopcock on the natural frequency and damping coefficient in blood pressure transducer kits

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Abstract

Two types of Planecta™ ports are commonly used as sampling ports in blood pressure transducer kits: a flat-type port (FTP) and a port with a three-way stopcock (PTS). Recently, a new type of three-way stopcock (Marvelous™) has been released as a Planecta™ counterpart, but its effects on the frequency characteristics and reliability of blood pressure monitoring have not been investigated. We assessed the influence of the Marvelous™ stopcock on the frequency characteristics of the pressure transducer kit. The basic pressure transducer kit, DT4812J, was modified by replacing one or two of the original three-way stopcocks with Marvelous™ stopcocks. The frequency characteristics (i.e., natural frequency and damping coefficient) of each kit were determined using wave parameter analysis software, and subsequently evaluated on a Gardner chart. Replacement of the original blood pressure transducer kit stopcocks with Marvelous™ stopcocks decreased the natural frequency (48.3 Hz) to 46.3 Hz or 44.8 Hz, respectively; the damping coefficient was not significantly changed. Plotting the data on a Gardner chart revealed that the changes fell within the adequate dynamic response region, indicating they were within the allowable range. Insertion of Marvelous™ stopcocks slightly affects the natural frequency of the pressure transducer kit, similar to inserting a PTS. The results indicate that the Marvelous™ stopcock is useful for accurate monitoring of arterial blood pressure, and may be recommended when insertion of two or more closed-loop blood sampling systems is necessary.

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Acknowledgements

We thank Editage for English language editing. The authors would also like to thank Masashi Kochaku from Nihon Kohden for providing to information of medical monitor filters.

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Authors and Affiliations

  1. Department of Anesthesiology, Graduate School of Dentistry, Kanagawa Dental University, 82 Inaoka-cho, Yokosuka-shi, Kanagawa, 238-0003, Japan

    Shigeki Joseph Luke Fujiwara, Shoko Itakura, Michiko Yasuda, Uno Imaizumi & Kazu-ichi Yoshida

  2. Department of Dental Anesthesiology, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan

    Shigeki Joseph Luke Fujiwara, Kentaro Ouchi, Takashi Hitosugi & Takeshi Yokoyama

  3. Department of Clinical Engineering, Teikyo Junior College, 6-31-1 Honmachi, Shibuya-ku, Tokyo, 151-0071, Japan

    Keiichi Tachihara

  4. Clinical Engineering, Almeida Memorial Hospital, 1509-2 Miyazaki, Oita-shi, Oita, 870-1133, Japan

    Satoshi Mori

  5. Section of Dental Education, Division of Oral Biological Sciences, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan

    Yoichiro Miki

  6. Argon Medical Devices Japan, Davinchi-Ningyocho 6F, 2-13-9 Nihonbashi-ningyochou, Chuo-ku, Tokyo, 103-0013, Japan

    Izumi Toyoguchi

  7. Department of Health and Medical Engineering School of Science and Engineering, Kokushikan University, 4-28-1 Setagaya, Setagaya-ku, Tokyo, 154-8515, Japan

    Shigeki Joseph Luke Fujiwara

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  1. Shigeki Joseph Luke Fujiwara
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  2. Keiichi Tachihara
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  3. Satoshi Mori
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  4. Kentaro Ouchi
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  5. Shoko Itakura
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  6. Michiko Yasuda
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  7. Takashi Hitosugi
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  8. Uno Imaizumi
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  9. Yoichiro Miki
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  10. Izumi Toyoguchi
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  11. Kazu-ichi Yoshida
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  12. Takeshi Yokoyama
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Corresponding author

Correspondence to Shigeki Joseph Luke Fujiwara.

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Conflict of interest

Izumi Toyoguchi is employed by Argon Medical Devices Japan, the Japanese branch of Argon Medical Devices, which provides Marvelous™. This work was supported by intradepartmental funds. No external financial support was obtained. The authors have no conflicts of interest to disclose.

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Fujiwara, S.J.L., Tachihara, K., Mori, S. et al. Influence of the marvelous™ three-way stopcock on the natural frequency and damping coefficient in blood pressure transducer kits. J Clin Monit Comput 32, 63–72 (2018). https://doi.org/10.1007/s10877-017-9979-0

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  • DOI: https://doi.org/10.1007/s10877-017-9979-0

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