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Clinical InvestigationsA Limited Diagnostic Investigation for Obstructive Sleep Apnea Syndrome: Oximetry and Static Charge Sensitive Bed
Section snippets
Subjects
Seventeen healthy, non-habitually snoring volunteers (nine men, eight women, aged 15 to 58 years; mean age, 36 years) underwent one night of SCSB-recording in their homes to study their respiration movement patterns. Recording of respiration movements and body movements were made on a two-channel tape recorder (Oxford Medilog). The relatives were asked to note when the subject fell asleep and woke up.
Seventy-seven patients (69 men, 8 women, aged 17 to 68 years; mean age, 49 years), whose
Results
In none of the recordings of the 17 normal control subjects did the diamond-shaped periodic respiration movement pattern appear.
The SCSB-oximetry and the simultaneously performed polysomnographic recordings were compared for each patient. It was found that the sleeping time could be fairly well estimated from the SCSB-trace alone, if the time during which there were indications of wakefulness (frequent body movements combined with irregular respiration movements) was deducted from the
Discussion
Based on the results of comparison with polysomnography, we suggest the following criteria to be used for diagnosis of OSAS with the SCSB-oximetry type of recording: (1) If periodic respiration movements are present during less than 20 percent of estimated sleep time and, in addition, ODI is less than 2, there is no evidence of significant upper airway obstruction. (2) If periodic respiration movement exceeds 45 percent of estimated sleep time and ODI exceeds 6, the recording is pathologic,
ACKNOWLEDGMENTS
The authors thank Professors Christian Guilleminault and Bengt Y Nilsson for valuable criticism, Dr. H-G Hårdemark for help with the statistical analysis, and Ms. Berit Lundin for preparation of the manuscript.
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Role of Screening in Sleep Disordered Breathing (SDB)
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2013, Sleep Medicine ReviewsCitation Excerpt :The prevalence of SBD in SCI patients has been evaluated using nocturnal oximetry or PSG. Different studies found a high prevalence of OSA among the SCI population, ranging from 9 to 68% (see Table 1 for details)13,14,16,17,49–61 depending on the screening method used and the characteristics of the population studied. However, the different recording methods, varying from oximetry to full PSG, and non-standard definitions of SBD and OSA hamper a comparison among these studies.
Emfit movement sensor in evaluating nocturnal breathing
2013, Respiratory Physiology and NeurobiologyCitation Excerpt :Repetitive respiratory events can also be detected with noninvasive movement sensors such as the static charge-sensitive bed (SCSB) and the Emfit (electromechanical film transducer) sensor, which are widely used in Finland in diagnosing SDB and periodic leg movements (Anttalainen et al., 2007b; Kirjavainen et al., 1996; Rauhala et al., 2009; Tenhunen et al., 2011). The suitability of SCSB movement sensor in sleep apnea diagnostics has been evaluated in many studies and it has been shown to identify obstructive apneas with high sensitivity (Anttalainen et al., 2010; Lojander et al., 1998; Polo et al., 1988; Polo, 1992; Salmi et al., 1989; Svanborg et al., 1990). In mattress scoring episodes of periodic apneas/hypopneas are named as obstructive periodic patterns (OP-patterns) by Polo et al. (1988).
Monitoring Techniques for Evaluating Suspected Sleep-Disordered Breathing
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Supported by a grant from foe Karolinska Institute.
Manuscript received November 29; revision accepted May 3.