This work examines sleep apnea syndrome, sleep physiology and self control of respiration during sleep. There is a review of respiration disorders during sleep and methods of monitoring sleep apnea syndrome. In another part the data of monitoration are processed and method of flow, saturation and snoring signal events detection is described, program algorithm is described and results are presented.

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Cognitive and psychosocial sequelae following hypoxic brain injury Abstract in English Hypoxic brain injury leads to neuronal necrosis and to other cerebral changes which may affect psychosocial functioning. Although the pathophysiology of cerebral hypoxia is multifactorial, and it is not possible to reliably describe the unified clinical picture of hypoxia patients, the most commonly described psychosocial consequences of cerebral hypoxia are cognitive impairment, increased anxiety and depressive symptoms. The aim of the present study is to characterize cognitive functioning and psychosocial changes of the patients exposing mild intermittent cerebral hypoxia (=chronic form of hypoxia, model of obstructive sleep apnea diagnosed by neurologist) and patients after severe one-time cerebral hypoxia (=acute form of hypoxia, model of cardiac arrest diagnosed by cardiologist). Regardless of the different etiology of particular hypoxia forms described in the theoretical part of the thesis, both forms may lead to neuronal death. In the experimental part we test a hypothesis comparing healthy individuals to patients with acute or chronic form of hypoxia in cognitive performance or anxiety and depressive symptoms. We document a decreased cognitive performance and higher level of state anxiety in a group of patients...

Endocrine and Metabolic Aspects of Various Sleep Disorders MUDr. Zuzana Vimmerová Lattová Abstract: Recent epidemiological and experimental data suggest a negative influence of shortened or disturbed night sleep on glucose tolerance. However, no comparative studies of glucose metabolism have been conducted in clinical sleep disorders. Dysfunction of the HPA axis may play a causative role in some sleep disorders and in other sleep disorders it may be secondary to the sleep disorder. Moreover, dysfunction of the HPA axis is regarded as a possible causative factor for the impaired glucose sensitivity associated with disturbed sleep. However, data on HPA system activity in sleep disorders are sparse and conflicting. We studied 25 obstructive sleep apnea (OSA) patients, 18 restless legs syndrome (RLS) patients, 21 patients with primary insomnia and compared them to 33 healthy controls. We performed oral glucose tolerance test and assessed additional parameters of glucose metabolism. The dynamic response of the HPA system was assessed by the DEX-CRH-test which combines suppression (dexamethasone) and stimulation (CRH) of the stress hormone system. Compared to controls, increased rates of impaired glucose tolerance were found in OSA (OR: 4.9) and RLS (OR: 4.7), but not in primary insomnia. In addition, HbA1c...