Its presence increases the work needed to trigger the ventilator, causes errors in the calculation of pulmonary compliance, may cause hemodynamic compromise, and complicates interpretation of hemodynamic measurements. Called also auto-PEEP and intrinsic PEEP. maximal expiratory pressure maximum expiratory ...
Measurement error, intrinsic to the calculation of pulse pressure variation (PPV) has not been studied but could contribute to this level of uncertainty. The purpose of this study was to quantify and compare measurement errors associated with PPV calculations. Hemodynamic data of patients under...
If this interpretation is correct, this result is an important finding because it provides evidence that the pressure transients generated by nsEP may be thermoelastic in nature, suggesting that rapid heating of the local environment by nsEP are responsible for the generation of pressure transients. ...
Finally, the generalized R2 is not a perfect measure of the variation explained by Cox models. Nevertheless, a measure of explained variance is essential for the correct interpretation of the prognostic value of a risk factor, because P-values of HRs do not necessarily reflect clinical ...
This includes implanted devices like pacemakers and increasingly the new class of mobile devices like glucose monitors and wearable blood pressure and heart monitors. A rules-engine then helps them sort out what matters and what is actionable. According to Harris, they want to be the “virtual ...
A pressure sensor was placed on the Chi position of the left wrist to record the radial pulse for 5 minutes using a DSOI-C data collection system. The waveform acquisition is shown in Figure 1. 2.2. Data Preprocessing The pulse signal will inevitably be polluted by the subjects’ breathing...
interpretation of forward and reverse flows, resulting in a reduction in apparent net flow, leading to an underestimation of reflection coefficient. The pulse wave separation (forward and reverse pressure waves) analysis technique used for pressure ratio computations resulted in substantial heterogeneity ...
This paper presents a pseudo-pressure and pseudo-time straight-line approach to interpret laboratory pulse decay data in order to estimate rock core permeability using gas as the pore fluid. The implementation of the straight-line approach provides a practical method to estimate gas permeability from...
Pulse transit time (PTT), which refers to the travel time between two arterial sites within the same cardiac cycle, has been developed as a novel cuffless form of continuous blood pressure (BP) monitoring. The aim of this study was to investigate differe
New indices of photoplethysmographic waveform variation can be used to detect minute changes in the microvascular capillary bed of tissues and has been used to develop a variability index that can detect thehaemodynamic effectsofpositive end expiratory pressure. The usefulness of this is yet to be...