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  • 1
    Electronic Resource
    Electronic Resource
    Nocturnal oxygen saturation and sleep quality in patients with advanced chronic obstructive pulmonary disease during treatment with moderate dose CR-theophylline (1992)
    Springer
    European journal of clinical pharmacology 43 (1992), S. 125-129 
    Details
    ISSN: 1432-1041
    Keywords: Theophylline, Nocturnal hypoxaemia ; chronic obstructive pulmonary disease ; sleep study ; static charge sensitive bed ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effect of a 24-h controlled-release (CR) preparation of theophylline (Th) on nocturnal arterial oxygen saturation (SaO2) and sleep quality has been evaluated in 7 patients with advanced chronic obstructive pulmonary disease (COPD) in a double-blind cross-over experiment; median values: age 61 y; PaO2 8.0 kPa; PaCO2 5.8 kPa. During treatment with 450–900 mg Th in the evening, morning plasma drug levels ranged from 5.2–12.9 µg·ml−1. During Th and placebo treatment, the median evening FEV1 was 0.45 l and 0.46 l, respectively, and the morning FEV1 was 0.53 l and 0.41 l. Sleep was monitored by whole-night polysomnographic recording of oximetric SaO2, airflow, respiratory and body movements (static charge sensitive bed), eye movements and submental electromyogram. There was no significant difference between Th and placebo in sleep quality. Th treatment was associated with a marginal improvement in nocturnal oxygenation in most of the patients; the average nocturnal SaO2 ranged from 84.4%–92.8% during Th and from 82.2–90.5% during placebo treatment, respectively. Only in the morning, during the last 2 h in bed, was the slight difference in SaO2 statistically significant in favour of Th. It is concluded that a moderate dose of CR-theophylline did not alter the sleep quality or substantially improve nocturnal oxygenation in patients with advanced COPD and mild to moderate day-time hypoxaemia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01740657
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  • 2
    Electronic Resource
    Electronic Resource
    Computer assisted detection of REM and non-REM sleep for analysis of nocturnal hypoxaemia in patients with ventilatory impairment (1994)
    Springer
    Journal of clinical monitoring and computing 11 (1994), S. 63-70 
    Details
    ISSN: 1573-2614
    Keywords: chronic obstructive pulmonary disease ; nocturnal hypoxaemia ; sleep stages ; sleep study ; computer analysis ; thoracoplasty
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Medicine
    Notes: Abstract A computer-assisted method for the evaluation of sleep and breathing in patients showing chronic ventilatory impairment is described and validated. Signals of body and respiratory movements (static charge sensitive bed), air-flow (thermistors), oxygen saturation (SaO2), electro-oculography (EOG), and electromyography (EMG) were recorded overnight and analysed. Using the compressed output graphs of the data and a rapid scoring procedure, stages of wakefulness, non-REM (stages S1–S4) and REM sleep were identified. The procedure allowed analysis of oxygen saturation data separately for each sleep stage. For validation of the method, the sleep stages identified were compared with traditional sleep staging based on a simultaneous recording of EEG, EMG and EOG in 10 patients with chronic obstructive pulmonary disease (COPD) and in 15 patients treated by thoracoplasty (TPL) for pulmonary tuberculosis. The recordings were performed in a patient ward. In total, 32 night recordings were analysed. In the COPD patients, the sensitivity and specificity of the new method were 87% and 84% in detecting non-REM sleep, and 72% and 87% in detecting REM sleep, respectively. In the TPL patients the sensitivity and specificity were 93% and 89% with respect to non-REM sleep, and 92% and 94% in regard to REM sleep. The new method and traditional sleep staging provided closely similar quantitative estimates of the degree of sleep stage-(REM and non-REM) dependent arterial oxygen desaturation. It is concluded that the computer-assisted method, which is considerably less time consuming than traditional polysomnography, is reliable in studying sleep-related oxygenation in patients with chronic lung diseases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01132846
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    Paper (German National Licenses)
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