[A study of blood loss during surgery for scoliosis. Posterior approach in 319 adolescents].

A retrospective study including 319 patients was realized from 1984 to 1993 in order to evaluate during scoliosis surgery the incidence on bleeding of the type of scoliosis and the anesthetic procedure. Blood losses were below one litre thus reducing the homologous blood transfusions. The patient was in prone position on a modified Wilson frame which facilitates venous return from the dorsal region.

[In vitro and in vivo effects of propofol on the hemoglobin dissociation curve].

This study assessed in vivo and in vitro the effects of propofol on the affinity of hemoglobin for oxygen in seven ASA 1 adults. For the in vivo study, venous blood samples were withdrawn before and after premedication, after the injection of 2.5 mg.