Pressure measurement characteristics of a micro‐transducer and balloon catheters
Article
Article Title | Pressure measurement characteristics of a micro‐transducer and balloon catheters |
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ERA Journal ID | 201375 |
Article Category | Article |
Authors | MacAskill, William (Author), Hoffman, Ben (Author), Johnson, Michael A. (Author), Sharpe, Graham R. (Author) and Mills, Dean E. (Author) |
Journal Title | Physiological Reports |
Journal Citation | 9 (8) |
Article Number | e14831 |
Number of Pages | 13 |
Year | 2021 |
Publisher | John Wiley & Sons |
Place of Publication | United Kingdom |
ISSN | 2051-817X |
Digital Object Identifier (DOI) | https://doi.org/10.14814/phy2.14831 |
Abstract | Respiratory pressure responses to cervical magnetic stimulation are important measurements in monitoring the mechanical function of the respiratory muscles. Pressures can be measured using balloon catheters or a catheter containing integrated micro-transducers. However, no research has provided a comprehensive analysis of their pressure measurement characteristics. Accordingly, the aim of this study was to provide a comparative analysis of these characteristics in two separate experiments: (1) in vitro with a reference pressure transducer following a controlled pressurization; and (2) in vivo following cervical magnetic stimulations. In vitro the micro-transducer catheter recorded pressure amplitudes and areas which were in closer agreement to the reference pressure transducer than the balloon catheter. In vivo there was a main effect for stimulation power and catheter for esophageal (Pes), gastric (Pga), and transdiaphragmatic (Pdi) pressure amplitudes (p < 0.001) with the micro-transducer catheter recording larger pressure amplitudes. There was a main effect of stimulation power (p < 0.001) and no main effect of catheter for esophageal (p = 0.481), gastric (p = 0.923), and transdiaphragmatic (p = 0.964) pressure areas. At 100% stimulator power agreement between catheters for Pdi amplitude (bias =6.9 cmH2O and LOA −0.61 to 14.27 cmH2O) and pressure areas (bias = −0.05 cmH2O·s and LOA −1.22 to 1.11 cmH2O·s) were assessed. At 100% stimulator power, and compared to the balloon catheters, the micro-transducer catheter displayed a shorter 10–90% rise time, contraction time, latency, and half-relaxation time, alongside greater maximal rates of change in pressure for esophageal, gastric, and transdiaphragmatic pressure amplitudes (p < 0.05). These results suggest that caution is warranted if comparing pressure amplitude results utilizing different catheter systems, or if micro-transducers are used in clinical settings while applying balloon catheter-derived normative values. However, pressure areas could be used as an alternative point of comparison between catheter systems. |
Keywords | balloon catheter Esophageal catheter micro-transducer catheter respiratory pressures |
ANZSRC Field of Research 2020 | 420701. Biomechanics |
420702. Exercise physiology | |
Byline Affiliations | School of Health and Wellbeing |
Nottingham Trent University, United Kingdom | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q65wy/pressure-measurement-characteristics-of-a-micro-transducer-and-balloon-catheters
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