Archive for the 'Breathing Disorders' Category

10 Nov

Predictors of Objective Level of Daytime Sleepiness in Patients with Sleep-Related Breathing Disorders: Discussion

These data support the sleep fragmentation hypothesis which states that the daytime sleepiness of patients with OSAS is due to the disruption of sleep by brief electroencephalographic arousals accompanying the cessation of an apnea or hypopnea. These findings do not refute the association of hypoxemia with daytime sleepiness in apneic patients. In fact, the data […]

09 Nov

Predictors of Objective Level of Daytime Sleepiness in Patients with Sleep-Related Breathing Disorders: Patients with MSLT

The correlations among the 11 parameters are displayed in Table 3. Significance levels are not indicated in the table, since all coefficients larger than r=0.14 were significant at p<0.01 or better. The question of interest is the relative size of the correlation and hence the amount of variance predicted. In predicting daytime sleepiness (MSLT, column […]

08 Nov

Predictors of Objective Level of Daytime Sleepiness in Patients with Sleep-Related Breathing Disorders: Results

The demographic characteristics and descriptive measures of the nocturnal sleep and respiratory disturbance of this sample of apneic patients is presented in Tables 1 and 2. The data presented include means, SDs, and CVs. The CV is a measure of the ratio of the mean to the SD which facilitates comparisons of variability among parameters. […]

07 Nov

Predictors of Objective Level of Daytime Sleepiness in Patients with Sleep-Related Breathing Disorders: Procedure

Procedure For the diagnostic evaluation, patients completed a questionnaire on sleep disorders before their first clinic visit, which detailed the symptoms and history of their sleep complaint. During the clinical interview, the sleep questionnaire was reviewed; a medical, psychiatric, and medication history was taken; and a physical examination was given. Seven days or more before […]

06 Nov

Predictors of Objective Level of Daytime Sleepiness in Patients with Sleep-Related Breathing Disorders: Materials and Methods

Both of these two studies demonstrate that subjective measures of sleepiness covary with hypoxemia; however, even if subjective sleepiness were reflective of actual levels of daytime sleepiness, these two studies would not resolve the issue of what causes the sleepiness associated with OS AS. Almost all apneic events are accompanied by an arousal from sleep […]

05 Nov

Predictors of Objective Level of Daytime Sleepiness in Patients with Sleep-Related Breathing Disorders

Among the various symptoms typically associated with the OS AS, the most prevalent is excessive daytime sleepiness; however, questions remain as to the etiology of the excessive sleepiness of patients with OS AS. Two hypotheses have been offered to explain the sleepiness: (1) sleep fragmentation, and (2) hypoxemia. Sleep fragmentation refers to the punctuation of […]

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