To investigate the temporal variability of dynamic cerebral autoregulation (CA), the transient response of cerebral blood flow to rapid changes in arterial blood pressure, a new approach was introduced to improve the temporal resolution of dynamic CA assessment. Continuous bilateral recordings of cerebral blood flow velocity (transcranial Doppler, middle cerebral artery), end-tidal Pco(2) (Pet(...

By reanalyzing our previous study (TAKANO et al., 1981) of resting ventilation and PACO2 during the menstrual cycle of eight healthy women, we found that relative to the follicular phase, a 9.4% increase in VA (p less than 0.05) and a 2.5 mmHg decrease in PACO2 (p less than 0.001) occurring during the luteal phase, both of which have been reported previously, were attributable mostly to a decre...

Arterial blood-gas tensions, pH, and peak expiratory flow rate were measured in 29 patients with chronic asthma in a stable state. The hypoxia in these patients was found to be comparable with the hypoxia seen in normal subjects at high altitude in its effects on arterial pressure of carbon dioxide (PaCO2). These results suggest that in patients with asthma the PaCO2 taken as normal should be r...

Objectives: The aim of this study was to evaluate the effect high-flow nasal cannula (HFNC) after early extubation on children undergoing cardiac surgery. Methods: This randomized controlled clinical trial performed among 92 aged 1 24 months surgery from March 5 August 30, 2020, in a pediatric post-cardiac intensive care unit (ICU). patients were receive either HFNC or conventional oxygen thera...

272 Communications to the Editor Communications for thzs section will be published as space and priorities permit. The comments should not exceed 350 words in length, with a maximum offive references; onefigure or table can be printed. Exceptions may occur under particular circumstance& Contributions may include comments on articles publirhed in this periodical, or they may be reports ofunique ...

272 Communications to the Editor Communications for thzs section will be published as space and priorities permit. The comments should not exceed 350 words in length, with a maximum offive references; onefigure or table can be printed. Exceptions may occur under particular circumstance& Contributions may include comments on articles publirhed in this periodical, or they may be reports ofunique ...

OBJECTIVES The aim of this study was to compare high-flow nasal cannula (HFNC) and conventional O2 therapy (OT) in paediatric cardiac surgical patients; the primary objective of the study was to evaluate whether HFNC was able to improve PaCO2 elimination in the first 48 h after extubation postoperatively. METHODS We conducted a randomized, controlled trial in pediatric cardiac surgical patien...