scholarly journals Pulse‐wave transit time with ventilator‐induced variation for the prediction of fluid responsiveness

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Koichi Yamashita
Keyword(s):  
Fluid Responsiveness ◽  
Transit Time ◽  
Pulse Wave ◽  
Pulse Wave Transit Time ◽  
Induced Variation

scholarly journals Correlation of Pulse Wave Transit Time with Pulmonary Artery Pressure in a Porcine Model of Pulmonary Hypertension

Biomedicines ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 1212
Author(s):  
Fabian Mueller-Graf ◽  
Jonas Merz ◽  
Tim Bandorf ◽  
Chiara Albus ◽  
Maike Henkel ◽  
...  
Keyword(s):  
Pulmonary Hypertension ◽  
Pulmonary Artery ◽  
Pulmonary Artery Pressure ◽  
Transit Time ◽  
Pulse Wave ◽  
Correlation Coefficients ◽  
Physiological Basis ◽  
Artery Pressure ◽  
Hypoxic Vasoconstriction ◽  
Pulse Wave Transit Time

For the non-invasive assessment of pulmonary artery pressure (PAP), surrogates like pulse wave transit time (PWTT) have been proposed. The aim of this study was to invasively validate for which kind of PAP (systolic, mean, or diastolic) PWTT is the best surrogate parameter. To assess both PWTT and PAP in six healthy pigs, two pulmonary artery Mikro-Tip™ catheters were inserted into the pulmonary vasculature at a fixed distance: one in the pulmonary artery trunk, and a second one in a distal segment of the pulmonary artery. PAP was raised using the thromboxane A2 analogue U46619 (TXA) and by hypoxic vasoconstriction. There was a negative linear correlation between PWTT and systolic PAP (r = 0.742), mean PAP (r = 0.712) and diastolic PAP (r = 0.609) under TXA. During hypoxic vasoconstriction, the correlation coefficients for systolic, mean, and diastolic PAP were consistently higher than for TXA-induced pulmonary hypertension (r = 0.809, 0.778 and 0.734, respectively). Estimation of sPAP, mPAP, and dPAP using PWTT is feasible, nevertheless slightly better correlation coefficients were detected for sPAP compared to dPAP. In this study we establish the physiological basis for future methods to obtain PAP by non-invasively measured PWTT.

scholarly journals Pulse wave transit time measured by imaging photoplethysmography in upper extremities

2016 ◽  
Vol 737 ◽  
pp. 012053
Author(s):  
M A Volynsky ◽  
O V Mamontov ◽  
I S Sidorov ◽  
A A Kamshilin
Keyword(s):  
Transit Time ◽  
Pulse Wave ◽  
Upper Extremities ◽  
Pulse Wave Transit Time
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