Chest
Clinical InvestigationsSleep and BreathingPerformance of Nasal Prongs in Sleep Studies: Spectrum of Flow-Related Events
Section snippets
Study Subjects
Twenty-seven subjects were studied during an all-nightpolysomnography in our sleep laboratory. The subjects were recruitedfrom two different groups: (1) a sample of 15 subjects from the generalpopulation recruited in the context of a prevalence study, and (2) 12consecutive patients referred to the sleep laboratory with suspectedsleep apnea/hypopnea syndrome (SAHS).
Sleep Study
Each patient was studied with full-night polysomnography, plusthe addition of nasal prongs to the setting. The neurologic
Results
The general characteristics and the sleep parameters of thetwo groups included in this study are shown in Table 1. There were no significant differences between them, with the exceptionof a greater neck circumference in the group of patients with suspected, SAHS.
Discussion
Flow measured through nasal prongs was easily implementedin full-night studies and provided technically optimal recordings inmost cases. None of them showed an uninterpretable nasal prong trace, and only in a small number of sleep studies were there somedifficulties in nasal prong scoring. In addition, nasal prongs allowedus to obtain further information on flow-related events that were notidentified with the conventional thermistor signal: snoring, prolongedand short periods of inspiratory
References (21)
>Indications and standards for cardiopulmonary sleep studies: American Thoracic Society Medical Section of the American Lung Association
Am Rev Respir Dis
(1989)Practice parameters for the indications for polysomnography and related procedures: Polysomnography Task Force, American Sleep Disorders Association Standards of Practice Committee
Sleep
(1997)- et al.
Accuracy of thermistors and thermocouples as flow-measuring devices for detecting hypopnoeas
Eur Respir J
(1998) - et al.
Comparison of direct and indirect measurements of respiratory airflow: implications for hypopneas
Sleep
(1997) - et al.
Detection of respiratory events during NPSG: nasal cannula/pressure sensor versus thermistor
Sleep
(1997) - et al.
Evaluation of nasal prongs for estimating nasal flow
Am J Respir Crit Care Med
(1997) - et al.
Flow limitation as a noninvasive assessment of residual upper-airway resistance during continuous positive airway pressure therapy of obstructive sleep apnea
Am J Respir Crit Care Med
(1994) - et al.
Time-course of stepwise CPAP titration: behavior of respiratory and neurological variables
Am J Respir Crit Care Med
(1995) - et al.
Assessment of inspiratory flow limitation invasively and non invasively during sleep
Am J Respir Crit Care Med
(1998) - et al.
Nasal prongs in the detection of sleep-related disordered breathing in the sleep apnoea/hypopnoea syndrome
Eur Respir J
(1998)
Cited by (68)
Prolonged partial obstruction during sleep is a NREM phenomenon
2018, Respiratory Physiology and NeurobiologyCitation Excerpt :However, the usefulness of the AHI alone to quantify SDB has been criticised because long periods of prolonged partial obstruction without apnoea or hypopnea are common in SDB patients (Anttalainen et al., 2016; Tenhunen et al., 2013). Prolonged partial obstruction causes flow limitation in the nasal pressure signal (Hernandez et al., 2001) and can be assessed quantitatively by measuring oesophageal pressure (see Bao and Guilleminault, 2004). One feasible way to evaluate prolonged partial obstruction is the Emfit mattress sensor.
Evaluation of the different sleep-disordered breathing patterns of the compressed tracheal sound
2015, Clinical NeurophysiologyCitation Excerpt :However, in addition to apneas and hypopneas revealing OSA, sleep recordings consist of other sleep-disordered breathing patterns, as well. These patterns include short flow limitation events associated with an increase in negative oesophageal pressure as well as an arousal, as in the upper airway resistance syndrome (UARS), or sustained low limitation periods, lasting from several minutes up to tens of minutes (Hernandez et al., 2001; Tenhunen et al., 2009). The sustained partial obstruction detected by a sleep mattress sensor has been found to be common especially among postmenopausal women (Polo-Kantola et al., 2003).
Heart rate variability evaluation of Emfit sleep mattress breathing categories in NREM sleep
2015, Clinical NeurophysiologyEmfit movement sensor in evaluating nocturnal breathing
2013, Respiratory Physiology and NeurobiologyCitation Excerpt :Attention has recently been paid to another type of SDB; prolonged or sustained partial upper airway obstruction (Anttalainen et al., 2007a, 2010; Bao and Guilleminault, 2004). This phenomenon can be assessed either by sustained negative increase in oesophageal pressure or by prolonged flow limitation pattern in the nasal pressure transducer signal (Bao and Guilleminault, 2004; Hernandez et al., 2001). Also the SCSB and the Emfit can serve as non-invasive means to detect prolonged partial obstruction (Kirjavainen et al., 1996; Polo, 1992; Polo et al., 1991; Tenhunen et al., 2011).
Supported by grants FIS 00/0575, SEPAR, CICYT: SAF99–0001, and the, Comissionat per a Universitats i Recerca (1997 SGR 00086) from the, Generalitat de Catalunya.