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

Shigeki Fujiwara, Keiichi Tachihara, Satoshi Mori, Kentaro Ouchi, Chizuko Yokoe, Uno Imaizumi, Yoshinari Morimoto, Yoichiro Miki, Izumi Toyoguchi, Kazu ichi Yoshida, Takeshi Yokoyama

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)925-931
Number of pages7
JournalJournal of Clinical Monitoring and Computing
Issue number6
Publication statusPublished - Dec 1 2016

All Science Journal Classification (ASJC) codes

  • Health Informatics
  • Critical Care and Intensive Care Medicine
  • Anesthesiology and Pain Medicine


Dive into the research topics of 'Effect of using a Planecta™ port with a three-way stopcock on the natural frequency of blood pressure transducer kits'. Together they form a unique fingerprint.

Cite this