BACKGROUND The onset of irregular inspiratory muscle activity has been observed toward the breakpoint of the breath-holding maneuver. We wondered if this was similar to the increased respiratory effort with paradoxical breathing seen during the resolution of an apnea in obstructive sleep apnea syndrome (OSAS). STUDY OBJECTIVE To compare the breakpoint of breath holding in normal subjects, OSA...

The diagnosis of sleep apnea syndrome (SAS) requires expensive and complex instrumentation. The purpose of the present study was to determine the value of end-tidal CO2 (EtCO2) in screening for sleep apneas. Thirty-nine patients referred to our sleep laboratory because of suspected SAS and ten normal subjects were studied. The EtCO2 was measured using an infrared spectrometer (POET) designed fo...

results fifty-seven patients were enrolled; 35 patients (62.5 %) were male. the mean of etco2 and paco2 of patients were 41.49 ± 9.80 and 64.74 ± 9.76, respectively. the mean of paco2 was significantly more than the means of etco2 in patients with copd. the association between arterial bicarbonate and etco2 was weak and not significant (p = 0.136 and r = 0.04). conclusions capnography can be us...

Capnograph is an indispensable tool for monitoring metabolic and respiratory function. In this study, the aim was to review the applications of end-tidal carbon dioxide (ETCO2) monitoring in emergency department, multiple databases were comprehensively searched with combination of following keywords: "ETCO2", "emergency department monitoring", and "critical monitoring" in PubMed, Google Scholar...

Hemorrhagic shock (HS) is a setting in which both pulmonary and cutaneous perfusion may be impaired. The goals of this study were to evaluate the relationship between end-tidal (etCO2), transcutaneous (tPCO2), arterial carbon dioxide (PaCO2) and lactate during lethal HS and to assess the effect of progressive HS on those variables and on a new variable, the noninvasive CO2 gradient ([NICO2G] or...

AIM OF THE STUDY Intrathoracic pressure regulation (IPR) is a novel, noninvasive therapy intended to increase cardiac output and blood pressure in hypotensive states by generating a negative end expiratory pressure of -12 cm H2O between positive pressure ventilations. In this first feasibility case-series, we tested the hypothesis that IPR improves End tidal (ET) CO2 during cardiopulmonary resu...

BACKGROUND Non-invasive transcutaneous capnometry (TcCO2) is used to assess the home ventilation's efficiency. Recently, end-tidal CO2 (ETCO2) sensors have been integrated in life-support home ventilators. The purpose of this study was to compare the ventilator-integrated ETCO2 with TcCO2, in home-ventilated neuromuscular disease patients. METHODS ETCO2 and TcCO2 were simultaneously measured ...

BACKGROUND AND OBJECTIVES During laparoscopy, the increase of the carbon dioxide tension may increase the synthesis of hydrochloric acid in the parietal cells of the stomach; the source of the secreted hydrogen ions is carbonic acid derived from the hydration of carbon dioxide. The present report tests this hypothesis by correlating the changes of end-tidal PCO2 (ETCO2) with the pH of the gastr...

Mathematical models are able to estimate the outcome of a patient to a certain ventilator setting. Employed in a medical decision support system (MDSS) this supports finding the optimum ventilation strategy for patients mechanically ventilated in ICU. Here, knowledge about current blood gas values like end-tidal CO2 (etCO2) is important to asses patient’s status. A model to predict etCO2 respon...