title: [Comparative studies on the efficiency of ventilation by engström-respirator ER 300 (author's transl)].
abstract: The efficiency of ventilation provided by the Engstrom-Respirator ER 300 was examined in 35 patients under general anaesthesia and relaxation during normoventilation and hyperventilation of 15% and 30%. For criteria the acid-base-status of arterial blood was used. There was a tendency to acidosis in all kinds of ventilation, probably as a consequence of surgical effects. During normoventilation the acid-base-status showed changes of low hyperventilation which are desired for security. During hyperventilation of 15% and 30%, arterial pCO2 was reduced to 30 and 27 Torr. Both situations showed no advantage over normoventilation. Using the Engstron-Respirator, normoventilation should be preferred during general anesthesia. Higher degrees of hyperventilation should be avoided because of their effects in lowering cerebral blood flow.
mesh_terms: D000136:Acid-Base Equilibrium; D000138:Acidosis / Q000209:etiology; D000758:Anesthesia; D001158:Arteries; D001784:Blood Gas Analysis; D002245:Carbon Dioxide / Q000097:blood; D002560:Cerebrovascular Circulation; D006801:Humans; D006985:Hyperventilation; D010313:Partial Pressure; D012122:Ventilators, Mechanical / Q000592:standards*
chemical_list: D002245:Carbon Dioxide
vernacular_title: Blutgasanalytische Untersuchungen zur Beatmungseffektivität des Engström-Respirators ER 300