TY - JOUR
T1 - Influence of the marvelous™ three-way stopcock on the natural frequency and damping coefficient in blood pressure transducer kits
AU - Fujiwara, Shigeki Joseph Luke
AU - Tachihara, Keiichi
AU - Mori, Satoshi
AU - Ouchi, Kentaro
AU - Itakura, Shoko
AU - Yasuda, Michiko
AU - Hitosugi, Takashi
AU - Imaizumi, Uno
AU - Miki, Yoichiro
AU - Toyoguchi, Izumi
AU - Yoshida, Kazu ichi
AU - Yokoyama, Takeshi
N1 - Funding Information:
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. 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.
Publisher Copyright:
© 2017, Springer Science+Business Media Dordrecht.
PY - 2018/2/1
Y1 - 2018/2/1
N2 - 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.
AB - 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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U2 - 10.1007/s10877-017-9979-0
DO - 10.1007/s10877-017-9979-0
M3 - Article
C2 - 28074417
AN - SCOPUS:85009165563
SN - 1387-1307
VL - 32
SP - 63
EP - 72
JO - Journal of Clinical Monitoring and Computing
JF - Journal of Clinical Monitoring and Computing
IS - 1
ER -