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Effect of using a Planecta™ port with a three-way stopcock on the natural frequency of blood pressure transducer kits

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Abstract

Blood pressure transducer kits are equipped with two types of Planecta™ ports—the flat-type Planecta™ port (FTP) and the Planecta™ port with a three-way stopcock (PTS). We reported that FTP application decreased the natural frequency of the kits. However, Planecta™ is an invaluable tool as it prevents infection, ensures technical simplicity, and excludes air. Hence, an ideal Planecta™ port that does not decrease the frequency characteristics is required. As a first step in this direction, we aimed to assess the influence of PTSs on the natural frequency of blood transducer kits. A DTXplus transducer kit (DT4812J; Argon Medical Devices, TX, USA) was used along with ≥1 PTSs (JMS, Hiroshima, Japan), and the frequency characteristics were assessed. The natural frequency and damping coefficient of each kit were obtained by using frequency characteristics analysis software, and these parameters were evaluated by plotting them on Gardner’s chart. Regardless of whether one or two PTSs were inserted, the natural frequency of the kits only slightly decreased (from 42.5 to 41.1 Hz, when 2 PTSs were used). Thus, the frequency characteristics of the kits with PTSs were adequate for pressure monitoring. The insertion of ≥2 FTPs in pressure transducer kits should be avoided, as they markedly decrease the natural frequency and lead to underdamping. However, the effect of PTS insertion in pressure transducer kits on the frequency characteristics is minimal. Thus, we found that the use of PTS markedly improved the frequency characteristics as compared to the use of FTP.

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Acknowledgments

This work was supported by intradepartmental funds. No external financial support was obtained. We thank JMS for information dissemination, and Editage for editing the manuscript.

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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 Fujiwara, Chizuko Yokoe, 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

    Keiichi Tachihara, Satoshi Mori, Kentaro Ouchi & Takeshi Yokoyama

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

    Izumi Toyoguchi

  4. Department of Oral Science, Graduate school of Dentistry, Kanagawa Dental University, 82 Inaoka-cho, Yokosuka-shi, Kanagawa, 238-0003, Japan

    Yoshinari Morimoto

  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

Authors
  1. Shigeki 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. Chizuko Yokoe
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  6. Uno Imaizumi
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  7. Yoshinari Morimoto
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  8. Yoichiro Miki
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  9. Izumi Toyoguchi
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  10. Kazu-ichi Yoshida
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  11. Takeshi Yokoyama
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Corresponding author

Correspondence to Shigeki Fujiwara.

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Fujiwara, S., Tachihara, K., Mori, S. et al. Effect of using a Planecta™ port with a three-way stopcock on the natural frequency of blood pressure transducer kits. J Clin Monit Comput 30, 925–931 (2016). https://doi.org/10.1007/s10877-015-9795-3

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  • DOI: https://doi.org/10.1007/s10877-015-9795-3

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