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The swamp eel (Monopterus albus) uses its buccal cavity to air breathe, while the gills are strongly reduced. It burrows into mud during the dry season, is highly tolerant of air exposure, and experiences severe hypoxia both in its natural habitat and in aquaculture. To study the ability of
It has been proposed that decreases in nasal resistance (Rn) during hypercapnia are entirely due to vasoconstriction in the nasal cavity. We hypothesized that alae nasi (AN) muscle activity dilates the nasal vestibule and contributes to the decrease in Rn during hypercapnia. Nine normal subjects
We investigated the behavioral, respiratory, and thermoregulatory responses elicited by acute exposure to both hypercapnic and hypoxic environments in Wistar audiogenic rats (WARs). The WAR strain represents a genetic animal model of epilepsy.
Behavioral analyses were performed using
By means of ultrasonic method, used in acute experiments on cats with closed abdominal cavity under nembutal narcosis, we studied the linear and volumetric blood flow velocity in the left phrenic artery, vascular resistance, systemic blood pressure, lung ventilation, arterial blood gases during
OBJECTIVE
To study the effect of chronic hypoxic hypercapnia on expression of COX-2 mRNA in pulmonary arterioles.
METHODS
SD rats were randomly divided into two groups: control group and hypoxic hypercapnic group. COX-2 mRNA was observed in pulmonary arterioles by the technique of in situ
Recent calibrated fMRI techniques using combined hypercapnia and hyperoxia allow the mapping of resting cerebral metabolic rate of oxygen (CMRO2) in absolute units, oxygen extraction fraction (OEF) and calibration parameter M (maximum BOLD). The adoption of such technique necessitates knowledge
We report two cases of marked hypercapnia of more than 60 mm Hg (PaCO2) and extensive subcutaneous emphysema noted during laparoscopic cholecystectomy. The first case, a 55-year-old man was diagnosed as having cholecystolithiasis and had hypercapnia up to 83.5 mm Hg (PaCO2) during laparoscopic
A 41-year old, 50 kg female was scheduled for laparoscopic cholecystectomy. Anesthesia was induced with thiopental 250 mg IV and endotracheal intubation was performed using succinylcholine 60 mg IV. Anesthesia was maintained with N2O (67%)-oxygen-sevoflurane (1.5-2%) and pancuronium was used for
In most reptiles, the ventilatory response to hypercapnia consists of large increases in tidal volume (V(T)), whereas the effects on breathing frequency (f(R)) are more variable. The increased V(T) seems to arise from direct inhibition of pulmonary stretch receptors. Most reptiles also exhibit a
For relatively invasive upper gastrointestinal endoscopy procedures, such as an endoscopic submucosal dissection (ESD), intravenous anesthesia is routinely used to reduce patient anxiety. However, with the use of intravenous sedation, even at mild to moderate depth of anesthesia, there For relatively invasive upper gastrointestinal endoscopy procedures, such as an endoscopic retrograde cholangiopancreatography (ERCP), and also lower gastrointestinal endoscopy procedures, intravenous anesthesia is routinely used to reduce patient anxiety. However, with the use of The marine dogfish (Squalus acanthias) and the seawater-adapted rainbow trout (Oncorhynchus mykiss) were exposed to acute environmental hypercapnia or hypoxia to evaluate (i) the dynamics of catecholamine release into the circulation and (ii) the impact of catecholamine release on gill ventilation
OBJECTIVE
To study the effects of puerarin on pulmonary Vascular remodeling in rats with pulmonary hypertension induced by chronic hypoxia and hypercapnia.
METHODS
Forty male rats (180-220) g of grade two were randomly divided into five groups: normal control group (NC), hypoxia-hypercapnia 1, 2, 3
OBJECTIVE
To compare the efficacy of positive pressure ventilation applied through a mask versus an endotracheal tube, using anesthetized/paralyzed foals as a model for foals with hypoventilation.
METHODS
Six 1-month-old foals.
METHODS
A crossover design was used to compare the physiologic response