Method of studying acceleration tolerance of pilots in flight conditions

The following procedure was used to study the pilot's tolerance to acceleration inflight. Experiments were carried out in a specially equipped plane with a dual monitoring system. Inflight the pilot performed 3 dives, attaining 3.0, 5.0 and 6.0 g for 30 sec at an interval of 1-2 min and an onset rate of 0.4-0.6 g/sec. The control over the health state and performance of the pilot was maintained by the coach as well as with the aid of breathing rate, ECG, ear pulse rate recordings and cynematography of the pilot's face during exposure to acceleration. These methods were employed in experimental flights of a good number of pilots. The results show that the methods may well be used to better medical monitoring inflight and to identify subjects with decreased tolerance to acceleration.     

Changes of peripheral blood flow in patients with cancer of the lungs, esophagus and cardia under the effect of anesthesia and surgery

The authors report the data on changes in peripheral circulation, depending on the kind of anesthesia, the amount of operative blood loss, alterations in circulating blood volume and localization of tumor in patients with cancer of the lung, esophagus and cardia. Totally, 35 patients (15--lung cancer, 10--esophageal cancer, 10--cancer of the cardia) were explored. In 25 cases fluothane was used as the main anesthetic, in 10--neuroleptanalgesia. The state of peripheral circulation was estimated by the period semielimination of radioactive xenon-133 from the muscle depot. It was found that alterations in peripheral circulation were not dependent on tumor localization, the use of fluothane and neuroleptanalgesia is associated with similar changes in peripheral blood flow and, finely, an increased loss of blood results in more pronounced alterations in peripheral circulation.