Cephalometric and computed tomographic predictors of obstructive sleep apnea severity

Lowe, Alan A.; Fleetham, John A.; Adachi, Satoshi; Ryan, C. Frank

doi:10.1016/s0889-5406(95)70101-x

Cited by 280 publications

(184 citation statements)

References 24 publications

Supporting

Mentioning

162

Contrasting

Unclassified

Order By: Relevance

“…The rationale of dental approaches is to secure upper airway space physically. Temporary or permanent soft tissue change is acquired by skeletal change 10,11 . Though the dental approach to OSA yielded satisfactory EDITORIAL http://dx.doi.org/10.5125/jkaoms.2012.38.…”

Section: Department Of Oral and Maxillofacial Surgery Section Of Denmentioning

confidence: 99%

Role of oral and maxillofacial surgeons in the treatment of obstructive sleep apnea patients

Yun

2012

J Korean Assoc Oral Maxillofac Surg

View full text Add to dashboard Cite

Section: Department Of Oral and Maxillofacial Surgery Section Of Denmentioning

confidence: 99%

Role of oral and maxillofacial surgeons in the treatment of obstructive sleep apnea patients

Yun

2012

J Korean Assoc Oral Maxillofac Surg

View full text Add to dashboard Cite

“…These morphologic alterations have been studied through various imaging techniques, including plain film cephalometrics, fluoroscopy, conventional CT, cine CT, conventional MRI, and MRI dynamic scans (Zhang et al, 2009). Considering that apnea and the respiratory cycle are dynamic processes, information on dynamic soft tissue alterations is necessary for analyzing the soft tissue morphology of OSAHS patients (Lowe et al, 1995;Trudo et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

“…Ultrafast MRI (UMRI) is a recently developed technique that obtains images at multiple locations with sufficient quality and temporal resolution (less than 1 s) to allow dynamic assessment of the upper airway and surrounding soft tissues (Ciscar et al, 2001;Rama et al, 2002;Pişkin et al, 2012). However, few studies have reported on the lingual shape in children with OSAHS using fast, dynamic MRI technology (Shott and Donnelly, 2004;Fricke et al, 2006;Zhang et al, 2009), and the tongue shape of adults with OSAHS has seldom been compared with normal subjects and during wakefulness and sleep (Lowe et al, 1995;Liu et al, 1999). Thus, in this study, dynamic alterations of the tongue during wakefulness and sleep were analyzed using UMRI to provide morphologic reference data related to the pathogenesis of OSAH.…”

Section: Introductionmentioning

confidence: 99%

Dynamic alterations of the tongue in obstructive sleep apnea-hypopnea syndrome during sleep: analysis using ultrafast MRI

Wang¹,

McDonald²,

Liu³

et al. 2014

Genet. Mol. Res.

View full text Add to dashboard Cite

ABSTRACT.Patients with obstructive sleep apnea-hypopnea syndrome (OSAHS) were evaluated using ultrafast magnetic resonance imaging (UMRI) while asleep and awake to analyze tongue changes. The upper airway of 21 OSAHS patients and 20 normal controls were examined during sleep using UMRI. A series of midline sagittal images of the upper airway were obtained to measure dynamic changes in tongue size and the distance from the tongue to the x-axis (an extended line from the anterior nasal spine to posterior nasal spine) and the y-axis (a perpendicular line from the center of the pituitary to the x-axis). The maximum and minimum sagittal Dynamic changes of the tongue in OSAHS during sleep diameters of the tongue were shorter in the OSAHS group than in the control group (P < 0.01) while awake, whereas the difference between the maximum and minimum vertical diameters of the tongue and the upper and central part of tongue between the posterior border and the retropharyngeal wall were greater (P < 0.05). During sleep, the maximum values and differences between the maximum and minimum tongue sizes in the OSAHS group were larger than in the control group (P < 0.05), whereas the minimum values were lower than in the control group (P < 0.01). Tongue size significantly differs between OSAHS patients and normal controls during sleep. The tongue tends to move downward during OSAHS, which may be attributed to increased upper airway resistance.

show abstract

“…The lengths of the soft palate and uvula have been studied through various methods (Trudo et al, 1998;Liu et al, 1999), including direct physical examination (Liu et al, 1999), cephalometric analysis (Sanner et al, 2002), computed tomography (CT), and magnetic resonance imaging (MRI) (Trudo et al, 1998;Tsuiki et al, 2004). However, most of these methods were performed on awake patients (Liu et al, 1999) or with an image obtained within 3 min (Lowe et al, 1995;Trudo et al, 1998). Given that apnea and the respiratory cycle are dynamic processes, information about the soft palate and uvula is overlooked or is not fully considered by some diagnostic imaging methods because of their low temporal resolution (Lowe et al, 1995;Trudo et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

“…However, most of these methods were performed on awake patients (Liu et al, 1999) or with an image obtained within 3 min (Lowe et al, 1995;Trudo et al, 1998). Given that apnea and the respiratory cycle are dynamic processes, information about the soft palate and uvula is overlooked or is not fully considered by some diagnostic imaging methods because of their low temporal resolution (Lowe et al, 1995;Trudo et al, 1998). Moreover, considering that OSAH occurs only during sleep, findings among conscious patients (Lowe et al, 1995;Liu et al, 1999) are not necessarily applicable to patients during spontaneous physiological sleep.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the dynamic changes in the soft palate and uvula in obstructive sleep apnea-hypopnea using ultrafast magnetic resonance imaging

Yl¹,

McDonald²,

Yh³

et al. 2014

Genet. Mol. Res.

View full text Add to dashboard Cite

ABSTRACT. Apnea and the respiratory cycle are dynamic processes in obstructive sleep apnea-hypopnea (OSAH), which occur only during sleep. Our study aimed to observe the dynamic changes in the soft palate and the uvula during wakefulness and sleep using ultrafast magnetic resonance imaging (UMRI) to provide reference data for the pathogenesis and treatment of OSAH. The dynamic changes in the soft palate and uvular tip of 15 male patients (average age: 50.43 ± 9.82 years) with OSAH were evaluated using UMRI of the upper 8597 Pathogenesis of obstructive sleep apnea-hypopnea ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 13 (4): 8596-8608 (2014) airway while asleep and awake after 1 night of sleep deprivation. A series of midline sagittal images of the upper airway were obtained. The distance from the center of the soft palate to the x-axis (an extended line from the anterior nasal spine to the posterior nasal spine), from the uvular tip to the x-axis, from the center of the soft palate to the y-axis (a perpendicular line from the center of the pituitary to the x-axis), and from the uvular tip to the y-axis (designated as PX, UX, PY, and UY, respectively) were measured during sleep and wakefulness. The minimum PX, PY, UX, and UY were shorter during sleep than during wakefulness, whereas the maxima were longer during sleep (P < 0.01), the differences between the maximum and minimum PX, PY, UX, and UY were larger during sleep (P < 0.01). The upward, downward, forward, and backward ranges of movement of the soft palate and the uvular tip were larger during sleep in OSAH patients. This increased compliance may trigger each airway obstructive event.

show abstract

Cephalometric and computed tomographic predictors of obstructive sleep apnea severity

Cited by 280 publications

References 24 publications

Role of oral and maxillofacial surgeons in the treatment of obstructive sleep apnea patients

Role of oral and maxillofacial surgeons in the treatment of obstructive sleep apnea patients

Dynamic alterations of the tongue in obstructive sleep apnea-hypopnea syndrome during sleep: analysis using ultrafast MRI

Analysis of the dynamic changes in the soft palate and uvula in obstructive sleep apnea-hypopnea using ultrafast magnetic resonance imaging

Contact Info

Product

Resources

About