Effect of planecta and ROSE™ on the frequency characteristics of blood pressure-transducer kits

Fujiwara, Shigeki; Kawakubo, Yoshifumi; Mori, Satoshi; Tachihara, Keiichi; Toyoguchi, Izumi; Yokoyama, Takeshi

doi:10.1007/s10877-014-9650-y

Cited by 8 publications

(9 citation statements)

References 10 publications

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“…26,29,30 The use of a damping device may improve the dynamic response characteristics of the system under these conditions. 31,32 There are no standards that address the use of blood conservation devices on central catheters, but the effect of devices on the dynamic response characteristics should be considered in any decision. 3.…”

Section: Aacn Practice Alertmentioning

confidence: 99%

Pulmonary Artery/Central Venous Pressure Monitoring in Adults

2016

Critical Care Nurse

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Section: Aacn Practice Alertmentioning

confidence: 99%

Pulmonary Artery/Central Venous Pressure Monitoring in Adults

2016

Critical Care Nurse

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“…In a previous study, we noted that the use of FTPs leads to a decrease in the natural frequency of the kit, indicating that the use of two or more FTPs should not be avoided to ensure accurate monitoring [3].…”

Section: Discussionmentioning

confidence: 98%

“…The analysis methods have been previously published by Watanabe et al and Fujiwara et al [3,5]. In this study, we used the square wave test for the assessment of the frequency characteristics.…”

Section: Analysis Of Frequency Characteristicsmentioning

confidence: 99%

“…We previously observed that the insertion of a flattype Planecta TM port (FTP) decreased the natural frequency of blood pressure transducer kits, whereas the insertion of the Resonance Over-Shoot Eliminator device (ROSE TM , Argon Medical Devices [AMD], TX, USA) increased the damping coefficient [3]. A decrease in the natural frequency of the kit would result in an overshoot of the arterial intra-arterial pressure wave, whereas an increase in the damping coefficient would usually result in an undershoot of the arterial intra-arterial pressure wave.…”

Section: Introductionmentioning

confidence: 99%

“…A decrease in the natural frequency of the kit would result in an overshoot of the arterial intra-arterial pressure wave, whereas an increase in the damping coefficient would usually result in an undershoot of the arterial intra-arterial pressure wave. Any changes to these frequency characteristics would affect the monitoring accuracy of these kits [3].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Fujiwara

Tachihara

Mori

et al. 2015

J Clin Monit Comput

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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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Frequency characteristics of pressure transducer kits with inserted pressure-resistant extension tubes

Fujiwara

Mori

Tachihara

et al. 2016

J Clin Monit Comput

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The accurate monitoring of arterial blood pressure is important for cardiovascular management. However, the frequency characteristics of pressure transducer kits are influenced by the length of the pressure-resistant tube. To date, there have been few studies addressing the frequency characteristics of pressure transducer kits with inserted pressure-resistant extension tubes (pressure-resistant extension tube (ET) circuits). In this study, we examine ET circuits from the viewpoint of the frequency characteristics of pressure transducer kits. DT4812J transducer kits (length 150 cm; Argon Medical Devices, TX, USA) were used. Three original ET circuits were prepared, with the pressure-resistant tube of the DT4812J being extended with a 30-cm length of pressure-resistant tube (180ET circuit), a 60-cm length of pressure-resistant tube (210ET circuit), and a 90-cm length of pressure-resistant tube (240ET circuit). Each of these circuits was evaluated as part of this study. The natural frequency of the original DT4812J circuit was 45.90 Hz while the damping coefficient was 0.160. For the 180 ET circuit, the natural frequency and damping coefficient were 36.4 Hz and 0.162, respectively. For the ET210 circuit, the natural frequency and damping coefficient were 30.3 Hz and 0.175, respectively. For the ET210 circuit, the natural frequency and damping coefficient were 25.3 Hz and 0.180, respectively. As a result of extending the circuit, it was found that the natural frequency decreased drastically, while the damping coefficient increased slightly. When the extension of a pressure transducer kit is required, we should pay careful attention to the major decrease in the natural frequency, which may influence the pressure monitoring.

show abstract

Effect of planecta and ROSE™ on the frequency characteristics of blood pressure-transducer kits

Cited by 8 publications

References 10 publications

Pulmonary Artery/Central Venous Pressure Monitoring in Adults

Pulmonary Artery/Central Venous Pressure Monitoring in Adults

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

Frequency characteristics of pressure transducer kits with inserted pressure-resistant extension tubes

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