Tongue base ultrasound: a diagnostic tool for predicting obstructive sleep apnea.
OBJECTIVE
We assessed the value of an ultrasound (US) examination in the diagnostic workup of patients with sleep-related breathing disorders by correlating US measurements with known parameters for the presence and severity of obstructive sleep apnea.


METHODS
Forty-one male patients who complained of snoring and/or daytime somnolence participated. The diagnostic protocol included history-taking, physical examination, polysomnography, and transcervical US examination of the tongue. The US results were compared with all of the other parameters.


RESULTS
The US imaging was reliable for demonstrating anatomic structures of the tongue base, discriminating between muscle, mucosa, and blood vessels. The lingual arteries were clearly visualized entering the tongue base at its lower lateral borders. There was a significant relationship between the severity of sleep-related breathing disorders (measured by polysomnography) and the width of the lower tongue base (measured as the distance between the lingual arteries). The distance between the lingual arteries also correlated with physical examination findings and patient complaints of daytime somnolence and the sensation of choking during the night.


CONCLUSIONS
Tongue base width, measured by US, may influence the severity of obstructive sleep apnea. This is the first demonstration of the possible role of US examination, an inexpensive, noninvasive, and non-irradiating office procedure, in the diagnostic workup for sleep-related breathing disorders.
Department of Otolaryngology, Kaplan Medical Center, Rehovot, affiliated with Hebrew University, Jerusalem, Israel.
Yonatan
Y
Lahav
Eyal
E
Rosenzweig
Zehava
Z
Heyman
Julia
J
Doljansky
Amit
A
Green
Yaron
Y
Dagan
D000328:Adult; D000368:Aged; D006801:Humans; D008297:Male; D008875:Middle Aged; D010808:Physical Examination; D017286:Polysomnography; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D012307:Risk Factors; D012720:Severity of Illness Index; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology; D012913:Snoring / Q000000981:diagnostic imaging / Q000209:etiology / Q000503:physiopathology; D014059:Tongue / Q000000981:diagnostic imaging* / Q000473:pathology / Q000503:physiopathology; D014463:Ultrasonography; D055815:Young Adult