Acta anaesthesiologica Scandinavica
-
Acta Anaesthesiol Scand · May 2002
Randomized Controlled Trial Clinical TrialAirway closure in anesthetized infants and children: influence of inspiratory pressures and volumes.
Cyclic opening and closing of lung units during tidal breathing may be an important cause of iatrogenic lung injury. We hypothesized that airway closure is uncommon in children with healthy lungs when inspiratory pressures are kept low, but paradoxically may occur when inspiratory pressures are increased. ⋯ Airway closure within tidal volumes may occur in artificially ventilated healthy children during ventilation with low inspiratory pressure. However, the risk of airway closure and thus opening within the tidal volume increases when the inspiratory pressures are increased.
-
Acta Anaesthesiol Scand · May 2002
Randomized Controlled Trial Comparative Study Clinical TrialImpact of laryngeal mask airway and tracheal tube on pulmonary function during the early postoperative period.
The tracheal tube (TT) produces reversible bronchoconstriction and increases pulmonary airway resistance compared to the laryngeal mask airway (LMA). The possible persistence of this effect in the postoperative period has not been studied. The aim of this study was to compare the early postoperative pulmonary function in healthy patients undergoing minor surgical procedures with the LMA or with the TT. ⋯ This study demonstrates greater early postoperative respiratory restrictive syndrome and lower arterial oxygen saturation following tracheal intubation compared to LMA use in patients without respiratory disease.
-
Acta Anaesthesiol Scand · May 2002
Clinical TrialHeart rate to arterial pressure impulse response during one lung ventilation.
Although one lung ventilation (OLV) is commonly used, little is known about the modulation of the autonomic nervous system with OLV while under general anesthesia. As the frequency domain and time domain analyses are powerful analytic tools, we investigated their modulation during OLV. ⋯ Impulse response analysis demonstrated that there is a greater effect on autonomic nervous system modulation during right OLV than in left OLV, which mainly results from a parasympathetic neural linkage origin.