Diagnostic Airway Pressure Recording in Sleep Apnea Syndrome

Tvinnereim, Magne; Cole, Philip; Haight, James S. J.; Hoffstein, V.

doi:10.3109/00016489509139346

Cited by 31 publications

(28 citation statements)

References 8 publications

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“…UA pressure measurements provide information about UA dynamics in terms of changes in UA pressure before, during and after the appearance of respiratory events. Results from UA pressure measurements have been reported by several authors using different techniques varying from a fluid-filled catheter [5] to movable catheters [6,7], a bias flow catheter [8][9][10] and micropressure sensors [11][12][13][14][15]. Most studies were performed in a limited number of patients (n<20) except those of KATSANTONIS et al [15], SCATVEDT [13] and METES et al [7].…”

mentioning

confidence: 99%

Site of upper airway obstruction in obstructive apnoea and influence of sleep stage

Boudewyns¹,

Heyning²,

Backer³

1997

Eur Respir J

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Twenty eight obstructive sleep apnoea patients underwent UA pressure measurements during polysomnography. Solid-state pressure sensors were located at the nasopharynx, oropharynx, tongue base, hypopharynx and oesophagus and the lower limit of UA obstruction was determined relying on the observed pressure pattern.The site of UA obstruction varied among consecutive apnoeas in all but two patients. The lower limit of UA obstruction was predominantly located at the nasoand oropharynx. Rapid eye movement (REM) sleep was associated with a tendency for obstruction to extend towards lower levels of the UA and nasopharyngeal occlusion was significantly less observed during REM compared to oropharyngeal obstruction.Upper airway obstruction involves more than one specific site of the upper airway in the majority of sleep apnoea patients. Obstruction at lower levels of the upper airway is more likely to be observed during rapid eye movement sleep.

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mentioning

confidence: 99%

Site of upper airway obstruction in obstructive apnoea and influence of sleep stage

Boudewyns¹,

Heyning²,

Backer³

1997

Eur Respir J

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“…This method continuously monitors changes of pressure (at the mesopharynx and esophagus) and temperature (at epi-and hypopharynx) through a flexible 2-mm catheter with transducers. Another 4 channels store: oxygen saturation (SaO 2 ), heart rate, body position and snoring sounds [7] . The objective of this study was to compare PSG and AG by measuring the following parameters: apnea-hypopnea index (AHI), apnea index (AI), hypopnea index (HI), pulse, SaO 2 , body position and the type of apnea (obstructive, mixed and central).…”

Section: Introductionmentioning

confidence: 99%

Polysomnography and ApneaGraph® in Patients with Sleep-Related Breathing Disorders

Divo

Selivanova²,

Mewes³

et al. 2008

ORL

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Purpose: To evaluate whether ApneaGraph (AG) and polysomnography (PSG) deliver comparable results in patients with sleep-related breathing disorders. Procedures: A prospective study was performed, which included 14 patients with obstructive sleep apnea syndrome. Apnea-hypopnea index (AHI), hypopnea index (HI), apnea index (AI), obstructive, central and mixed apnea, oxygen saturation (SaO₂), pulse and body position were simultaneously assessed by PSG and AG in each individual. Results: There was a good correlation between measurements of AG and PSG for AHI, pulse, SaO₂, body position and central apnea. However, our study showed differences between PSG and AG for AI (p = 0.002), HI (p = 0.013), mixed apnea (p = 0.003) and obstructive apnea (p = 0.013). AG indicated that 2/14 patients had a pure upper airway obstruction, 6/14 patients had a predominance of lower obstruction and 6/14 patients had a predominance of upper obstruction. Conclusion: AG provides comparable results for AHI, pulse, SaO₂, body position and central apnea when compared to PSG, but not for the rest of the measurements. Using AG, the distribution of sites of obstructive events could be identified in this study in all of the patients.

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“…Previous work has shown that pressure recordings provide comprehensive diagnostic information in SRBD [10]. The AG device, in the diagnosis of OSA, compares favourably with polysomnography.…”

Section: Discussionmentioning

confidence: 91%

Evaluation of ApneaGraph in the diagnosis of sleep-related breathing disorders

Singh

Al-Reefy

Hewitt

et al. 2008

Eur Arch Otorhinolaryngol

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ApneaGraph relies on measuring pressure and airXow simultaneously at diVerent levels in the pharynx identifying the segment of airway obstruction and providing baseline respiratory parameters. This study aims to evaluate ApneaGraph and correlate results with both sleep nasendoscopy and polysomnography. This was a prospective study of 49 patients with snoring and/or obstructive sleep apnoea. Thirty of the these patients underwent a PSG and an ApneaGraph study simultaneously in the Sleep Lab. Nineteen patients attended the day surgery unit and had a sleep nasendoscopy with a 10-min ApneaGraph analysis. Polysomnography was used to validate the ApneaGraph system. There are no signiWcant diVerences (independent t test, P > 0.15) between ApneaGraph compared to Polysomnography based on the apnoea-hypopnoea index, total number of apnoeic events, average oxygen saturations and maximum desaturation. This suggests that the ApneaGraph can be used to assess OSA. Statistically, there is poor correlation between the two groups (Spearman's 0.29). In the cases of discordance, ApneaGraph places greater emphasis on a lower pharyngeal contribution. This unique study analyses the ApneaGraph system in the diagnosis of obstructive sleep apnoea and snoring. It demonstrates the beneWts of this new system and highlights certain limitations in localizing the site and level of pharyngeal obstruction in patients with sleep disorders.

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Diagnostic Airway Pressure Recording in Sleep Apnea Syndrome

Cited by 31 publications

References 8 publications

Site of upper airway obstruction in obstructive apnoea and influence of sleep stage

Site of upper airway obstruction in obstructive apnoea and influence of sleep stage

Polysomnography and ApneaGraph® in Patients with Sleep-Related Breathing Disorders

Evaluation of ApneaGraph in the diagnosis of sleep-related breathing disorders

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