ENT Sleep Specialist · São Paulo

Snoring & Sleep Apnea:
from diagnosis to the right treatment

Loud snoring, fragmented sleep, persistent fatigue — these symptoms may be signs of obstructive sleep apnea, a condition with serious cardiovascular consequences. Explore the causes, available treatment options, and when surgery is — or isn't — the best choice.

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Understanding the condition

What is obstructive sleep apnea?

Obstructive sleep apnea (OSA) is a chronic disorder in which the upper airway repeatedly collapses during sleep. Each episode — an "apnea" — can last from a few seconds to over a minute, cutting off airflow and forcing a brief arousal that restores muscle tone and opens the airway again. These micro-awakenings are usually too brief to be remembered, but they shatter the architecture of sleep and keep the brain in a state of low-grade stress throughout the night.

OSA is classified by the Apnea-Hypopnea Index (AHI): the average number of respiratory events per hour of sleep. Mild OSA is defined as 5–14 events/hour, moderate as 15–29, and severe as 30 or more. A person with severe untreated OSA may stop breathing hundreds of times each night without ever knowing it.

The downstream consequences extend far beyond a bad night's rest. Each apnea triggers a surge of cortisol and adrenaline, temporarily spiking blood pressure and heart rate. Over years, these repetitive stresses are associated with a significantly elevated risk of systemic hypertension, arrhythmias (especially atrial fibrillation), coronary artery disease, stroke, type 2 diabetes, and metabolic syndrome.

Key fact

OSA affects approximately 30% of adults over 40, yet the vast majority remain undiagnosed — often attributing their symptoms to stress, aging, or simply being "a bad sleeper."

Know the difference

Snoring vs sleep apnea: what's the difference?

Simple snoring

Vibration of soft palate and pharyngeal tissues without airflow stoppage
Oxygen saturation stays normal
Sleep architecture is largely preserved
Partner is disturbed, but the snorer's health impact is lower
Can still be a social or relationship problem worth treating

Treatable, less urgent

Obstructive sleep apnea

Complete or near-complete airway collapse, stopping airflow for 10+ seconds
Oxygen drops repeatedly — often below 90%
Deep and REM sleep are severely curtailed
Daytime sleepiness, cognitive fog, mood changes, fatigue
Raised cardiovascular risk with chronic untreated disease

Requires diagnosis and treatment

Important: Many people with OSA do snore loudly — but not all loud snorers have apnea. A polysomnography (sleep study) is the only way to confirm OSA and quantify its severity. Dr. Henrique can guide you through the appropriate diagnostic pathway.

Root causes

Causes of obstruction: where the problem lies

The upper airway runs from the nostrils to the larynx. Obstruction can arise at any level — and the best treatment depends entirely on accurately identifying which anatomical sites are involved.

Nasal level

A deviated nasal septum, hypertrophic turbinates, nasal polyps, or chronic mucosal inflammation can significantly increase nasal resistance. The nose normally accounts for about 50% of total airway resistance. When nasal breathing becomes effortful, there is a strong reflex to open the mouth — which collapses the pharynx and predisposes to snoring and OSA.

Nasal surgery alone rarely cures moderate-to-severe OSA, but it consistently improves CPAP tolerance and can meaningfully reduce AHI in mild cases.

Palatal-pharyngeal level

The soft palate and its uvula, the lateral pharyngeal walls, and the palatine tonsils form a narrow corridor that is particularly prone to collapse during sleep when muscle tone drops. Tonsillar hypertrophy is the leading cause of pediatric OSA; in adults, a long uvula, thick soft palate, or redundant lateral walls are common culprits.

Surgical options at this level include UPPP (uvulopalatopharyngoplasty), tonsillectomy, and more targeted palatal procedures. Results depend heavily on patient selection.

Lingual and hypopharyngeal level

An enlarged tongue base (lingual tonsil hypertrophy, macroglossia, or simply excess tissue relative to jaw size) can obstruct the hypopharynx — the lowest part of the throat. Patients with retrognathia (a recessed jaw) have a structurally narrower space for the tongue, compounding the risk. This level of obstruction is often missed without drug-induced sleep endoscopy (DISE).

Oral appliances work at this level by advancing the lower jaw and pulling the tongue base forward. Hypoglossal nerve stimulation targets it surgically.

Obesity and pharyngeal adipose tissue

Excess fat is deposited not only under the skin but also within and around the pharyngeal walls, narrowing the airway lumen from the outside in. Neck circumference above 40 cm (women) or 43 cm (men) is an independent predictor of OSA. Weight loss is one of the most effective — and most consistently underutilized — treatments for OSA in patients with obesity.

Even a 10% reduction in body weight can reduce AHI by up to 26% in obese patients with moderate-to-severe OSA.

A complete map

Treatment options

There is no single best treatment for sleep apnea — the right choice depends on OSA severity, anatomy, BMI, patient preference, and tolerance. Here is an evidence-based overview.

CPAP / APAP

Continuous positive airway pressure remains the gold-standard treatment for moderate and severe OSA. A small machine delivers pressurized air through a mask, acting as a pneumatic splint to keep the airway open throughout the night. APAP (auto-adjusting PAP) titrates pressure breath by breath and is better tolerated by most new users.

First-line for moderate–severe OSA

Highly effective at eliminating apneas when used consistently
Reduces cardiovascular risk substantially with good adherence
Non-surgical, reversible

Adherence remains the main challenge: ~50% of patients use it fewer than 4 hours/night at 1 year.

Mandibular Advancement Device (MAD)

A custom-fitted oral appliance holds the lower jaw forward during sleep, increasing the retroglossal space and preventing tongue-base collapse. It is particularly effective in positional OSA (worse on the back) and mild-to-moderate disease with prominent lingual/hypopharyngeal obstruction.

Preferred for mild–moderate OSA or CPAP intolerance

Silent, portable, no electricity required
Generally better tolerated than CPAP
Can be used as CPAP alternative in moderate OSA

Requires healthy teeth and temporomandibular joints. Dental side effects can occur with prolonged use.

Nasal surgery

Septoplasty, turbinate reduction, and functional endoscopic sinus surgery (FESS) address nasal-level obstruction. While nasal surgery is rarely curative for OSA by itself, it reliably improves CPAP adherence by lowering the pressure required to maintain airway patency, and in some mild cases it can normalize the AHI.

Adjunct or primary treatment for nasal obstruction

Improves CPAP adherence and reduces required pressure
Addresses nasal breathing, smell, and quality of life
Often covered alongside other ENT procedures

Rarely sufficient as standalone therapy for moderate–severe OSA.

Pharyngeal surgery (UPPP & variants)

Uvulopalatopharyngoplasty removes and reshapes redundant soft palate, uvula, and pharyngeal tissue. Modern variations — including lateral pharyngoplasty, expansion sphincter pharyngoplasty, and palatal advancement — have improved outcomes. Success is highest when obstruction is localized to the palate-pharynx level, confirmed by DISE (drug-induced sleep endoscopy).

Selected patients with palatal obstruction

Can achieve significant AHI reduction in well-selected cases
Eliminates snoring in the vast majority of patients
Permanent structural change — no nightly device required

Results are variable without DISE-guided patient selection. Not effective for multi-level obstruction alone.

Hypoglossal nerve stimulation

A surgically implanted system (Inspire® is the best known) detects breathing effort and delivers mild electrical stimulation to the hypoglossal nerve, causing the tongue to move forward and open the airway. It is reserved for patients with moderate-to-severe OSA who cannot tolerate CPAP and have the appropriate anatomy (confirmed by DISE and BMI criteria).

Emerging option for CPAP-intolerant patients

Highly effective in eligible candidates
Controlled by a small remote — no mask required
Consistent nightly use much higher than CPAP

Expensive, requires specific anatomical criteria, and involves implant surgery.

Lifestyle modifications

Weight loss, avoidance of alcohol close to bedtime, positional therapy (avoiding the supine position), and treatment of nasal congestion are all evidence-based measures that can meaningfully reduce AHI. In patients with mild or positional OSA and overweight, lifestyle changes may be the most impactful single intervention.

Essential complement to any treatment

Weight loss: up to 26% AHI reduction per 10% weight lost
Positional therapy: effective in 25–30% of OSA patients
No cost, no device — but requires sustained commitment

Rarely sufficient alone for moderate–severe OSA, but essential alongside other therapies.

Surgical perspective

Nasal surgery for apnea: what it fixes and what it doesn't

A common source of confusion is whether fixing the nose cures sleep apnea. The short answer: it can help significantly, but seldom cures it on its own. Here is why that matters clinically.

The nose is responsible for warming, humidifying, and filtering inhaled air — functions that are difficult for mouth breathing to replicate. When nasal resistance is high (as with a deviated septum or hypertrophic turbinates), the effort required to breathe nasally during sleep increases, often causing the patient to shift to mouth breathing. Mouth breathing changes the position of the jaw and tongue, reducing the pharyngeal space and directly worsening apnea.

What nasal surgery accomplishes in OSA:

Reduces nasal resistance, making nasal breathing easier and more comfortable
Lowers the CPAP pressure needed to maintain airway patency — which directly improves comfort and adherence
In a subset of patients (typically mild OSA, predominantly nasal obstruction), can reduce AHI enough to normalize the index
Improves sleep quality, daytime alertness, and quality of life even when AHI doesn't fully normalize

What nasal surgery doesn't do:

Does not address pharyngeal or tongue-base collapse — the most common sites in adult OSA
Will not eliminate the need for CPAP in most patients with moderate-to-severe OSA
Is not an alternative to weight loss in obese patients with OSA

The clinical decision framework Dr. Henrique uses evaluates each patient's anatomy at every level of the airway — nasal, palatal, and lingual — using nasal endoscopy, targeted imaging, and in selected cases, drug-induced sleep endoscopy (DISE). This allows treatment to be directed precisely at the site or sites of obstruction rather than applied generically.

Clinical note

Patients scheduled for CPAP who also have nasal obstruction are frequently referred for septoplasty before CPAP initiation. Studies consistently show higher CPAP adherence and lower prescribed pressures following nasal surgery.

Recognize the signs

When should you seek evaluation?

You don't need to have every symptom. Even one or two of the following is enough to warrant a sleep-focused ENT consultation.

Nighttime symptoms

Loud, persistent snoring — especially if irregular or punctuated by silences
Witnessed apneas (breathing pauses noted by a partner)
Gasping or choking awakenings
Frequent nocturia (getting up to urinate more than once a night)
Restless sleep, frequent position changes
Night sweats without other explanation

Daytime symptoms

Unrefreshing sleep — waking tired despite adequate hours in bed
Excessive daytime sleepiness (falling asleep during reading, meetings, or driving)
Cognitive difficulties: poor concentration, memory lapses, "brain fog"
Morning headaches
Irritability, low mood, or anxiety without clear cause
Decreased libido or sexual dysfunction

Higher-risk profiles

BMI above 30 kg/m²
Neck circumference > 40 cm (women) or > 43 cm (men)
Uncontrolled or resistant hypertension
Atrial fibrillation or other arrhythmias
Type 2 diabetes or metabolic syndrome
History of stroke or coronary artery disease

Book a consultation

In-person appointments in Bela Vista, São Paulo. Private practice only.

About the physician

ENT sleep specialist in São Paulo

Dr. Henrique Ito Baldin is an otolaryngologist (ENT specialist) with focused training in upper airway surgery, sleep medicine, and respiratory performance. His practice takes a comprehensive view of the upper airway — from the nasal valves to the hypopharynx — allowing him to identify the specific anatomical factors contributing to each patient's snoring or apnea and recommend treatment that is precisely targeted, not generic.

The evaluation typically includes a detailed sleep history, flexible nasal endoscopy, review of polysomnography results (or referral for a sleep study if not yet performed), and — when surgical treatment is being considered — drug-induced sleep endoscopy (DISE) to map collapse sites during simulated sleep.

Medical License CRM-SP 191.528

Specialty Otolaryngology · Sleep Medicine

Location Rua Maestro Cardim, 560 · Bela Vista, São Paulo

Practice type Private · in-person consultations

ABORL-CCF CFM CRM-SP

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Share your name and phone number — Dr. Henrique's team will confirm your appointment via WhatsApp.

Common questions

Frequently asked questions

Do I need a referral to see Dr. Henrique about sleep apnea?

No referral is needed. You can book directly via WhatsApp. If you have a recent sleep study (polysomnography or home sleep test), please bring the results — it significantly speeds up the diagnostic process. If you haven't had one yet, Dr. Henrique can request or recommend the appropriate test.

Is sleep apnea surgery permanent? Could it come back?

The structural changes from nasal or pharyngeal surgery are permanent, but OSA can recur or worsen over time if contributory factors change — particularly significant weight gain, aging (which reduces pharyngeal muscle tone), or new anatomical changes. Most patients experience durable improvement, especially when surgery is combined with lifestyle modification and, when needed, a residual PAP or oral appliance.

Can I stop CPAP after having surgery?

In some cases, yes — particularly after multi-level surgery in well-selected patients or after significant weight loss. However, this should only be confirmed with a repeat sleep study (not assumed). Many patients can reduce CPAP pressure or transition to an oral appliance, but discontinuing CPAP without objective confirmation is not recommended for moderate-to-severe OSA.

My partner says I snore but I sleep fine — do I still need an evaluation?

Yes. The majority of patients with moderate and even severe OSA feel they sleep "fine" and attribute their fatigue or cognitive sluggishness to other causes. OSA impairs sleep quality at a microscopic level — the arousals are too brief to be consciously remembered but sufficient to prevent deep and restorative sleep stages. An objective sleep study is the only way to know for certain.

What is DISE and should I have one?

Drug-induced sleep endoscopy (DISE) is a procedure performed under light sedation in which a flexible scope is used to directly observe the airway while the patient is in a sleep-like state. It allows the physician to identify precisely where and how the airway collapses — information that cannot be obtained from a standard sleep study alone. DISE is recommended before pharyngeal surgery and before selecting candidates for hypoglossal nerve stimulation. Not every patient needs it.

Is OSA treatment covered by health insurance in Brazil?

Dr. Henrique's practice operates on a private, fee-for-service basis. Surgical procedures performed at affiliated hospitals may be partially covered depending on your insurance plan and policy terms. The consultation itself, diagnostic scoping, and any pre-operative planning are billed directly to the patient. Please contact us via WhatsApp and we can discuss specifics for your situation.

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Snoring & Sleep Apnea:from diagnosis to the right treatment