Multivariate analysis of the volumetric capnograph for PaCO2 estimation.

Purpose: End-tidal CO2 (eTCO2) can be used to estimate the arterial CO2 (PaCO2) under steady-state conditions, but that relationship deteriorates during hemodynamic or respiratory instability. We developed a multivariate method to improve our ability to estimate the PaCO2, by using additional information contained in the volumetric capnograph (Vcap) waveform. We tested this approach using data from a porcine model of chest trauma/hemorrhage.

Effect of marital status on clinical outcome of heart failure.

Background: Despite significant advances in pharmacological and nonpharmacological treatment of heart failure (HF), there are more than 1 million HF visits annually to the emergency department. Studies indicate that HF clinical outcome is affected not only by medical interventions but also by social factors such as marital status.

Objectives: This study aimed to determine the effect of marital status of HF patients on clinical outcome of HF in a high-risk population.