title: Effect of using a Planecta™ port with a three-way stopcock on the natural frequency of blood pressure transducer kits.
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.
authors.affiliation: Department of Anesthesiology, Graduate School of Dentistry, Kanagawa Dental University, 82 Inaoka-cho, Yokosuka-shi, Kanagawa, 238-0003, Japan. josephluke@dance.ocn.ne.jp.
authors.forename: Shigeki
authors.initials: S
authors.lastname: Fujiwara
authors.affiliation: Department of Dental Anesthesiology, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
authors.forename: Keiichi
authors.initials: K
authors.lastname: Tachihara
authors.affiliation: Department of Dental Anesthesiology, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Mori
authors.affiliation: Department of Dental Anesthesiology, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Ouchi
authors.affiliation: Department of Anesthesiology, Graduate School of Dentistry, Kanagawa Dental University, 82 Inaoka-cho, Yokosuka-shi, Kanagawa, 238-0003, Japan.
authors.forename: Chizuko
authors.initials: C
authors.lastname: Yokoe
authors.affiliation: Department of Anesthesiology, Graduate School of Dentistry, Kanagawa Dental University, 82 Inaoka-cho, Yokosuka-shi, Kanagawa, 238-0003, Japan.
authors.forename: Uno
authors.initials: U
authors.lastname: Imaizumi
authors.affiliation: Department of Oral Science, Graduate school of Dentistry, Kanagawa Dental University, 82 Inaoka-cho, Yokosuka-shi, Kanagawa, 238-0003, Japan.
authors.forename: Yoshinari
authors.initials: Y
authors.lastname: Morimoto
authors.affiliation: 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.
authors.forename: Yoichiro
authors.initials: Y
authors.lastname: Miki
authors.affiliation: Argon Medical Devices Japan, Davinchi-Ningyocho 6F, 2-13-9 Nihonbashi-ningyochou, Chuo-ku, Tokyo, 103-0013, Japan.
authors.forename: Izumi
authors.initials: I
authors.lastname: Toyoguchi
authors.affiliation: Department of Anesthesiology, Graduate School of Dentistry, Kanagawa Dental University, 82 Inaoka-cho, Yokosuka-shi, Kanagawa, 238-0003, Japan.
authors.forename: Kazu-Ichi
authors.initials: KI
authors.lastname: Yoshida
authors.affiliation: Department of Dental Anesthesiology, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Yokoyama
mesh_terms: D001795:Blood Pressure Determination / Q000295:instrumentation* / Q000379:methods*; D015924:Blood Pressure Monitors; D002406:Catheterization, Peripheral / Q000295:instrumentation* / Q000379:methods*; D004867:Equipment Design; D006801:Humans; D007564:Japan; D014160:Transducers, Pressure
keywords: Blood pressure transducer kits; Frequency characteristics; Natural frequency; Planecta™ with a three-way stopcock