Prognosis of the frequency of attacks of schizophrenia (according to findings from an epidemiologic study)

In 915 patients with attack-like schizophrenia with a duration of the disorder not less than 15 years, the authors studied some clinical and endogenous factors in order to determine the criteria of prognosis of the attacks. It was displayed that in most of the cases schizophrenia proceeded with a small amount of attacks. Manifestation at young age (irrespective of the duration of the disorder), its affinity to the periodical pole of the disorder and concomitance of subsequent attacks of manic disturbances correlated with a large amount of attacks.     

External respiration and gas exchange in man exposed to simulated diving at 350 M

Nine test subjects performed 4 dives in a He-O2 atmosphere at 3.5 MPa for 3-21 days. Their external respiration and gas exchange were measured at rest and maximum physical load. At rest the basic respiratory parameters remained unaltered. However respiratory reserves decreased under the influence of increased gas density. At a maximum workload the power of which proved lowered the ventilation gain was inadequate. This led to CO2 retention in the body and, consequently, to subjects' refusal to continue physical work. Prolonged exposure to 3.5 MPa caused the most significant respiratory changes during the first 3 days and their slight normalization and constancy during subsequent 2.5 weeks. This was, probably, associated with a slight pO2 increase in the breathing gas.