Acta anaesthesiologica Scandinavica
-
Capnography and measurement of the respiratory minute volume were carried out on normal, conscious subjects during breathing of pure O2 via a Mapleson C modification of a Magill attachment, with and without continuous gas evacuation. The measurements were performed in two series, with intermittent discharge and with continuous evacuation. ⋯ The measurements indicated CO2 accumulation at a flow below 200% of the respiratory minute volume. There was no significant difference between the systems with and without evacuation.
-
Acta Anaesthesiol Scand · Jan 1976
Randomized Controlled Trial Clinical TrialArrhythmias during halothane anesthesia I: The influence of atropine during induction with intubation.
The changes in cardiac rhythm which occurred during induction of halothane-N2O/O2 anesthesia with thiopenthal and one single dose of suxamethonium for intubation were studied in two groups of patients, one (at random) of which was given atropine intravenously 0.1 mg/10 kg 2 min before induction.
-
Acta Anaesthesiol Scand · Jan 1976
Anesthesia for cesarean section III: effects of epidural analgesia on the respiratory adaptation of the newborn in elective cesarean section.
A rise in fetal Paco2 was observed after elective cesarean section in patients anesthetized both with a barbiturate and with nitrous oxide/oxygen. Epidural analgesia seemed to be a good alternative in order to attain better blood gas values in the newborn infant. Fourteen healthy mothers and their infants were studied in connection with elective cesarean section. ⋯ Maternal blood pressure falls were observed in four cases, and fetal effects could be detected. Although epidural analgesia has a more favorable effect upon the newborn's metabolic component, both the compared methods allow good respiratory adaptation provided they are used correctly. Mothers can be given the opportunity to choose between being conscious or asleep when their child is delivered.
-
Acta Anaesthesiol Scand · Jan 1976
Oxygen transport and venous admixture in the extremely obese. Influence of anaesthesia and artificial ventilation with and without positive end-expiratory pressure.
Eight extremely obese patients (mean weight 136 kg) were studied when awake and breathing air, and during anaesthesia with controlled ventilation (oxygen fraction in inspirate (FIO2): 0.5). During anaesthesia, the atients were first studied with zero end-expiratory pressure (ZEEP) ventilation. Then two different positive end-expiratory pressures (PEEP) were applied, 10 cmH2O and 15 cmH2O, in order to study the effect of an increase in functional residual capacity (FRC). ⋯ This was due to simultaneous reduction in QS/QT and QT. At a PEEP of 15cmH2O, the P(A-a)O2 was 21.2 +/- 7.1 kPa, oxygen availability 862 +/- 170 ml/min, QS/QT 13 +/- 4 and QT 4.4 +/- 0.6 1. It is concluded that PEEP ventilation significantly reduces QS/QT in extremely obese patients during anaesthesia and should be used in these patients if there is arterial hypoxemia despite a high FIO2.
-
Acta Anaesthesiol Scand · Jan 1976
Jet ventilation for fiberoptic bronchoscopy under general anesthesia.
An oxygen jet method ventilating patients during laryngoscopy has been applied to fiberoptic bronchoscopy. A 3.5 mm plastic tube 24.5 cm long was inserted into the trachea through the mouth. An intermittent jet of oxygen at 3.5 atm (50 psi) was applied to this tube using a 1.5 mm ID plastic catheter to ventilate the patient. ⋯ The high PO2 levels were maintained even during suctioning. General anesthesia for fiberoptic bronchoscopy can be performed using an endotracheal tube not smaller than 8 mm internal diameter (ID). The advantages of the oxygen jet technique are that it can be used in smaller patients and that the upper airway can be examined.