Snoring (Adults)

Dr Jason Roth (MED0001185485) — Specialist Otolaryngologist & Head and Neck Surgeon, specialist registration in Otorhinolaryngology, Head & Neck Surgery.

Snoring is the noise generated by turbulent airflow vibrating the soft tissues of the upper airway during sleep. It is extremely common — approximately 40% of adult men and 24% of adult women snore regularly — but it varies enormously in its significance. At one end of the spectrum it is a mild positional nuisance; at the other it is a cardinal symptom of obstructive sleep apnoea (OSA), a potentially serious condition with established cardiovascular, metabolic, and cognitive consequences. The appropriate management of snoring in any individual depends fundamentally on whether OSA is present, and if so, its severity.

The Physiology of Snoring

During sleep, muscle tone throughout the body — including the muscles of the upper airway — is reduced. In susceptible individuals, this relaxation allows the soft tissues of the pharynx (the back of the throat) to partially collapse toward the midline during inspiration, narrowing the airway. Air passing through a narrowed segment must move faster to maintain the same flow volume, generating turbulence that vibrates the surrounding tissues — the palate, uvula, tonsils, base of tongue, and lateral pharyngeal walls.

Snoring is a sign of partial airway obstruction. Obstructive sleep apnoea occurs when the airway collapses completely, stopping airflow entirely for ten seconds or more — an apnoea. The brain detects the resulting oxygen desaturation and arousal occurs (usually brief and unremembered), airway muscle tone is transiently restored, and breathing resumes — often with a loud snort or gasp. These cycles may occur hundreds of times per night in severe OSA, profoundly fragmenting sleep architecture without the person being consciously aware.

The Apnoea-Hypopnoea Index (AHI) — the number of apnoeas and hypopnoeas per hour of sleep — is the standard measure of OSA severity:

AHI 5–14: Mild OSA
AHI 15–29: Moderate OSA
AHI ≥30: Severe OSA

Health Consequences of Obstructive Sleep Apnoea

Untreated moderate to severe OSA carries significant health risks that are independent of other comorbidities:

Cardiovascular Disease

OSA is an independent risk factor for hypertension, atrial fibrillation, coronary artery disease, stroke, and sudden cardiac death. The mechanisms include sympathetic nervous system activation from repeated arousals, intermittent hypoxia causing oxidative stress and endothelial dysfunction, and thoracic pressure swings during obstructed breathing attempts that increase cardiac afterload. Effective OSA treatment lowers blood pressure — particularly in patients with resistant hypertension — and reduces the risk of atrial fibrillation recurrence after cardioversion.

Metabolic Effects

OSA is associated with insulin resistance, impaired glucose tolerance, and type 2 diabetes, through mechanisms including cortisol dysregulation, leptin and ghrelin imbalance, and obesity — which is itself both a consequence and a cause of OSA.

Neurocognitive Effects

Fragmented sleep from OSA causes excessive daytime sleepiness, impaired concentration, memory difficulties, and slowed reaction time. OSA is associated with an increased risk of motor vehicle accidents — some studies suggest the risk is comparable to driving under the influence of alcohol in severe untreated OSA. Long-term OSA may contribute to the development of dementia.

Mental Health

OSA is strongly associated with depression and anxiety, and successful OSA treatment demonstrably improves mood and quality of life. The relationship is bidirectional — depression impairs sleep quality, and poor sleep quality worsens depression.

Driving and Occupational Safety

In Australia, sufferers of excessive daytime sleepiness have a legal obligation to inform licensing authorities and must not drive until treated. Heavy vehicle and commercial driver licence holders are subject to mandatory sleep apnoea screening in many jurisdictions. Untreated OSA may affect fitness for occupations requiring sustained vigilance.

ENT Assessment for Snoring and OSA

The ENT assessment begins with a comprehensive history of sleep symptoms — snoring frequency and volume, witnessed apnoeas, choking or gasping, excessive daytime sleepiness (quantified using the Epworth Sleepiness Scale), nocturia, morning headaches, and cognitive complaints. Questionnaires such as the STOP-BANG score provide a rapid clinical pretest probability for OSA.

Examination of the upper airway includes assessment of:

Nose: Septal deviation, turbinate hypertrophy, polyps, nasal valve collapse — identifying nasal obstruction that may be contributing to mouth breathing and increased airway resistance during sleep
Oropharynx: Tonsil size (graded 1–4), palate length and position, uvula size, Mallampati score (an index of oropharyngeal crowding)
Nasopharynx: Adenoid size (relevant in adults with residual adenoid hypertrophy or nasopharyngeal tumour)
Hypopharynx and larynx: Visualised by flexible nasendoscopy — base of tongue, epiglottis, and hypopharynx assessment
Body habitus: BMI, neck circumference (>40cm is an independent risk factor for OSA)
Jaw anatomy: Micrognathia or retrognathia reduces pharyngeal dimensions and predisposes to OSA

A formal sleep study (polysomnography or home sleep apnoea testing) is arranged where OSA is suspected. This quantifies the AHI, oxygen desaturation index, sleep architecture, arousal index, and snoring — providing the data needed to guide treatment decisions and, where OSA is confirmed, to determine severity and the most appropriate management pathway.

Treatment Options

Lifestyle modification

Weight reduction is the single most effective lifestyle intervention for OSA. A 10% reduction in body weight produces approximately a 26% reduction in AHI. Alcohol cessation or reduction (particularly within three hours of sleep) is important — alcohol selectively relaxes pharyngeal dilator muscles and profoundly worsens OSA. Sedatives and sleeping medications similarly worsen pharyngeal collapsibility. Positional therapy — avoiding the supine position — is effective in position-dependent OSA (AHI significantly worse in supine vs lateral sleep). Smoking cessation reduces pharyngeal mucosal oedema.

CPAP (Continuous Positive Airway Pressure)

CPAP is the standard first-line treatment for moderate to severe OSA. A mask worn over the nose (or nose and mouth) delivers a constant positive pressure that acts as a pneumatic splint, maintaining upper airway patency throughout the respiratory cycle. It is highly effective — virtually eliminating apnoeas and hypopnoeas when used consistently — and the cardiovascular, cognitive, and metabolic benefits of CPAP are well established. The principal challenge is adherence. Modern CPAP devices are quiet, small, humidified, and auto-adjusting; many patients adapt well. Those who do not tolerate CPAP despite optimised mask fitting and pressure settings may benefit from alternative treatments.

Mandibular advancement splint (MAS)

A custom-made oral device worn during sleep that advances the mandible forward, tensioning the pharyngeal soft tissues and enlarging the airway. Effective for mild to moderate OSA and well tolerated by the majority of patients who trial it. Less effective than CPAP at AHI reduction in severe OSA but achieves better compliance in many patients, and may therefore provide comparable real-world clinical benefit. Fabricated by a dental sleep specialist. Side effects include temporary jaw discomfort and minor tooth movement with prolonged use.

Nasal surgery

Nasal obstruction from a deviated septum, inferior turbinate hypertrophy, or nasal valve collapse increases upper airway resistance and promotes mouth breathing, which reduces the pharyngeal airway’s protective reflexes. Nasal surgery — septoplasty, turbinoplasty — does not reliably reduce the AHI in OSA but may improve CPAP tolerance (by reducing the required mask pressure) and substantially improve quality of life in patients with significant nasal obstruction. Septoplasty → | Turbinoplasty →

Pharyngeal surgery — UPPP and related procedures

Uvulopalatopharyngoplasty (UPPP) with tonsillectomy removes and repositions pharyngeal soft tissue to enlarge the oropharyngeal airway — tonsils, part of the soft palate, and the uvula are addressed. It is effective in carefully selected patients where tonsillar hypertrophy and a narrow oropharynx are the primary sites of collapse. Patient selection using drug-induced sleep endoscopy (DISE) — in which the airway is examined during pharmacologically induced sleep to identify the dominant site of collapse — improves surgical outcomes. UPPP is not appropriate for all patients and is less effective when the primary site of collapse is at the tongue base or hypopharynx.

Hypoglossal nerve stimulation (Inspire therapy)

An implantable device that delivers electrical stimulation to the hypoglossal nerve — which controls tongue protrusion — in synchrony with breathing, advancing the tongue forward during each inspiration and preventing tongue base collapse. Approved for patients with moderate to severe OSA who are intolerant of CPAP and have anatomy suitable for the device (assessed by a drug-induced sleep endoscopy showing a concentric palatal pattern excludes candidacy). Available in Australia in specialist centres.

A comprehensive assessment is necessary before any specific treatment is recommended — no single treatment is appropriate for all patients, and many patients benefit from combined approaches addressing multiple anatomical and physiological contributors to airway narrowing.

Dr Roth’s Clinical Perspective

The most important thing I do in a snoring consultation is establish whether obstructive sleep apnoea is present. Snoring without OSA is largely a social problem — significant for a bed partner, but not a health risk to the snorer in itself. Snoring with moderate or severe OSA is a different matter, with established cardiovascular and metabolic consequences that require treatment. The assessment pathway starts with a sleep study, not a surgical plan — because the treatment depends entirely on whether OSA is present and how severe it is.

Surgical treatment of snoring has a real role, but it is specifically in patients who have primary snoring or mild OSA, have a clearly identifiable anatomical contributor to their obstruction, and have either failed or are genuinely unsuitable for CPAP. I am straightforward about the limitations of palatal surgery for OSA — it improves snoring reliably, but its efficacy for treating moderate to severe OSA is more limited. Setting that expectation clearly before proceeding matters more than the patient leaving consultation feeling optimistic about surgery.

— Dr Jason Roth, MBBS, FRACS (ORL-HNS)

Dr Jason Roth — Specialist Otolaryngologist Sydney

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Dr Roth consults from Dee Why on Sydney’s Northern Beaches. A GP referral is recommended. All consultations involve a thorough assessment and a detailed discussion of your options — there is no obligation to proceed.

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Dr Jason Roth (MED0001185485) — Specialist Otolaryngologist & Head and Neck Surgeon.

Dr Jason Roth | MBBS, FRACS (ORL-HNS) | MED0001185485
Specialist Otolaryngologist & Head and Neck Surgeon
Specialist registration — Otorhinolaryngology, Head & Neck Surgery
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