Revista española de anestesiología y reanimación
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Rev Esp Anestesiol Reanim · Jul 1992
Comparative Study Clinical Trial Controlled Clinical Trial[Patient-controlled analgesia (PCA) with variable doses: an alternative to conventional PCA?].
We have prospectively studied the effects of three types of patient controlled anesthesia (PCA) in 30 patients who underwent elective upper abdominal surgery. Patients were allocated into three groups of 10. The first group received postoperative anesthesia by means of intravenous conventional PCA at fixed demand doses (PCADF). ⋯ After the first 2 hours, patients of PCADV group continued using lower morphine doses, but these differences were not significant when compared with PCADF group, although were present with respect to patients of PCAC + DV group (p less than 0.01). The incidence of secondary effects was not significantly different among the three groups. Based on these results we propose a modification in present PCA pumps.
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Rev Esp Anestesiol Reanim · Jul 1992
[Effect of isoflurane on gas exchange and systemic and pulmonary hemodynamics in man during single lung ventilation].
We studied the effect of 1.5% isoflurane end expiratory fraction on arterial oxygenation and on systemic and pulmonary hemodynamics during nonsurgical single lung ventilation. ⋯ We conclude that 1.5% isoflurane end expiratory concentrations did not significantly affect pulmonary oxygenation during single lung ventilation.
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Rev Esp Anestesiol Reanim · Jul 1992
[Experience with 100 anesthetized patients ventilated with laryngeal mask].
We studied 100 adult patients who were anesthetized for different surgical procedures and were ventilated with laryngeal mask either with spontaneous or controlled ventilation. Despite of the inexperience we achieved an appropriate placement of the mask in 99% of cases; 74% at the first attempt, 22% at the second, and 4% at the third. In 87.8% of patients we had an adequate control of the air way. ⋯ In one patient we were unable to correctly place the mask and another anesthetic technique had to be performed. Laryngeal mask is useful in the control of the air way in anesthetized patients with spontaneous ventilation. Some inconvenience may arise when controlled ventilation is used.