24×7 Emergency Care

1-8-31/1, Minister Road, Secunderabad, Telangana 500003

EMERGENCY:Severe OSA with oxygen drops below 80% during sleep carries significant cardiac and stroke risk —call040-46324365immediately — 24 hours, 7 days— 24/7

SLEEP DISORDERS

Obstructive Sleep Apnoea in Hyderabad: The Nighttime Breathing Disorder That Is Damaging Your Heart, Brain, and Blood Pressure While You Sleep

Q: My husband snores very loudly and sometimes seems to stop breathing. Is this dangerous?

Yes — witnessed apnoeas (stopping breathing during sleep) are the most significant clinical feature of OSA, and they indicate a level of airway obstruction that is almost certainly causing significant nocturnal oxygen desaturation. Each apnoea that lasts more than 10 seconds during which oxygen levels fall is a cardiovascular and cerebrovascular stress event. Repeated hundreds of times per night, over years, this produces hypertension, atrial fibrillation, and increased stroke risk. At KIMS, a home sleep test can confirm OSA within 1–2 weeks of referral. The test is simple, non-invasive, and takes one night at home. CPAP therapy, once initiated, typically eliminates the apnoeas completely and produces rapid improvement in daytime energy and long-term cardiovascular risk. Call 040-44885000.

Q: I have tried CPAP before but could not tolerate it. Is there anything else?

CPAP intolerance is one of the most common challenges in OSA management, and it is almost always addressable with the right interventions. The most common reasons for CPAP intolerance and their solutions: pressure too high — use APAP (auto-titrating) mode; mask leak or discomfort — try a different mask interface (nasal pillow, nasal cradle, or full-face mask); claustrophobia — desensitisation protocol (wearing the mask awake for increasing periods before sleep); dry mouth or nasal congestion — add a heated humidifier; difficulty exhaling against pressure — use CPAP with expiratory pressure relief (EPR) feature. At KIMS, we systematically address each barrier to CPAP tolerance. For patients who genuinely cannot use CPAP despite optimisation, a mandibular advancement device or hypoglossal nerve stimulation assessment can be arranged. Please call 040-44885000 for a CPAP troubleshooting review.

Q: My doctor says I have mild OSA (AHI of 10) and do not need treatment. But I am exhausted every morning and have a headache. Should I be treated?

Yes — the decision to treat OSA is based on both the AHI severity AND the symptom burden. Mild OSA (AHI 5–14) with significant symptoms — particularly EDS severe enough to affect functioning, morning headache, and unrefreshing sleep — is an indication for CPAP therapy. The AHI threshold is a guide, not an absolute cutoff. Additionally: if you have cardiovascular risk factors (hypertension, diabetes, prior stroke), treating even mild OSA is recommended because of the cumulative cardiovascular risk of chronic intermittent hypoxia. At KIMS, the treatment decision for mild OSA is individualised based on symptoms, cardiovascular risk profile, and patient preference. Call 040-44885000.

Q: Does CPAP help with blood pressure in addition to the snoring?

Yes — and this is one of the most important cardiovascular benefits of CPAP therapy in OSA. Untreated OSA is the most common cause of secondary (treatable) hypertension. Multiple randomised trials show that CPAP in OSA patients with hypertension reduces systolic blood pressure by an average of 2–3 mmHg — which, at the population level, translates to meaningful reductions in stroke and heart attack risk. In patients with severe OSA and poorly controlled hypertension, the blood pressure reduction can be 5–10 mmHg or more. Some patients are able to reduce the number of antihypertensive medications they take after their OSA is treated. The blood pressure benefit is greatest in patients who are most compliant with CPAP use (≥6 hours per night). Call 040-44885000.

Q: My child snores loudly and is very restless during sleep. Could children have OSA?

Yes — childhood OSA is common and important to diagnose and treat. In children, the most common cause is adenotonsillar hypertrophy (enlarged tonsils and adenoids) obstructing the airway — rather than the obesity and anatomical factors that dominate in adult OSA. Features of childhood OSA: loud snoring on most nights; mouth breathing during sleep; restless sleep with frequent position changes; bedwetting (nocturnal enuresis) that may be related to arousal-triggered urine production; daytime behavioral problems (hyperactivity, inattention) that are often the primary presenting complaint and can be misdiagnosed as ADHD; and in severe cases, growth retardation from the metabolic demands of OSA. At KIMS, childhood OSA is assessed with paediatric polysomnography, and tonsillectomy and adenoidectomy are arranged for appropriate cases in coordination with ENT surgery. Call 040-44885000.

Polysomnography, home sleep testing, and CPAP therapy at KIMS Neuroscience, Secunderabad, Hyderabad. OSA affects an estimated 4–9% of Indian adults — fewer than 1% are diagnosed.

View Our Specialists

Obstructive sleep apnoea occurs when the muscles supporting the upper airway repeatedly relax during sleep, causing the airway to collapse. Each apnoea (complete blockage) or hypopnoea (partial blockage) triggers a fall in blood oxygen, then a brief arousal to restore airway tone. This cycle — collapse, oxygen drop, arousal, restoration, sleep, collapse again — occurs 5 to 100+ times per hour. In India, OSA affects an estimated 4-9% of adults (50+ million people) with fewer than 1% diagnosed. Asian populations develop OSA at lower BMI than Western populations due to retrognathia narrowing the airway. Untreated OSA is the most common secondary cause of treatment-resistant hypertension, and doubles stroke risk. CPAP eliminates apnoeas completely and typically produces dramatic clinical improvement within 1-2 weeks.

What it is: Repeated upper airway collapse during sleep. Oxygen drops, arousal, restoration, sleep again. Can occur 5-100+ times per hour. The snoring sound is the vibrating partially collapsed airway.
India burden: 4-9% of Indian adults = 50+ million people with OSA. <1% diagnosed. Asian retrognathia produces OSA at lower BMI than Western populations. Indian OSA is significantly underdiagnosed.
STOP-Bang screening at KIMS: Snoring (loud) · Tired · Observed apnoeas · Pressure (BP on treatment) · BMI >35 · Age >50 · Neck >40cm · Gender (male). Score 0-2 low, 3-4 intermediate, 5-8 high risk.
Cardiovascular impact: OSA: most common secondary cause of treatment-resistant hypertension · 3-4x atrial fibrillation risk · 2-3x stroke risk · Doubles road accident risk. Every hypertensive patient with snoring should be tested.
Nocturia — the underrecognised sign: OSA causes nocturia (not the other way around). The apnoea-triggered arousal precedes the urge to urinate. ANP released from negative intrathoracic pressure stimulates urine production. CPAP typically reduces nocturia from 3-4 to 0-1 voids per night.
CPAP at KIMS: Auto-titrating CPAP (APAP) · 4-week data download review · Residual AHI target <2 events/hour · Compliance support: mask fitting, humidifier, ramp mode, multiple interface options · Standard: 4+ hours on 70%+ of nights.
Contact KIMS: 040-44885000 · Home sleep test within 1-2 weeks · In-laboratory PSG for complex cases · CPAP initiation programme.

Fact	Details
Severity	Mild: AHI 5-14 · Moderate: AHI 15-29 · Severe: AHI 30+ events/hour · Treatment based on AHI severity AND symptoms
India-specific pattern	4-9% adults = 50+ million · <1% diagnosed · Asian retrognathia at lower BMI · Rising obesity · Low awareness among patients and physicians
STOP-Bang screening	0-2: low risk · 3-4: intermediate · 5-8: high risk · Combined with Epworth Sleepiness Scale at KIMS first visit
Cardiovascular effects	Most common secondary cause of treatment-resistant HTN · 3-4x AF risk · 2-3x stroke risk · 2x road accident risk · Metabolic syndrome, T2DM, erectile dysfunction
CPAP (gold standard)	Eliminates apnoeas (residual AHI <2) · Restores normal sleep architecture · Resolves morning headache · Improves BP (2-3 mmHg average, up to 10 mmHg in severe OSA + HTN)
Alternatives to CPAP	Mandibular advancement device (mild-moderate) · Positional therapy · Weight loss (10% body weight = 26% AHI reduction) · Hypoglossal nerve stimulation (CPAP-intolerant)
Childhood OSA	Most common cause: adenotonsillar hypertrophy · Features: snoring, restless sleep, bedwetting, hyperactivity (often misdiagnosed as ADHD) · Paediatric PSG + ENT coordination at KIMS

About This Condition

The Accountant Who Was Told His Blood Pressure Was Just Stress

A 48-year-old accountant in Hyderabad has been on three antihypertensive medications for the past 4 years, but his blood pressure remains poorly controlled at 158/96 mmHg despite medication compliance. His cardiologist has referred him to KIMS because of unexplained treatment-resistant hypertension. At the KIMS consultation, additional history is taken: his wife says he snores loudly every night, and she has witnessed him stopping breathing for 15–20 seconds before gasping and restarting. He wakes with a headache most mornings. He is exhausted during the day and relies on 2–3 cups of coffee to function through the afternoon. His Epworth Sleepiness Scale score is 14/24 (significant daytime sleepiness).

STOP-Bang score: 6/8 (high risk). A home sleep test is arranged at KIMS within 1 week. Apnoea-Hypopnoea Index (AHI): 38 events per hour — severe OSA. Oxygen desaturation index: 35 events per hour. Minimum oxygen saturation during sleep: 78%.

CPAP is initiated at KIMS with an auto-titrating CPAP device, with 4-week follow-up data download. At 4-week review: CPAP compliance 6.2 hours per night; residual AHI on CPAP: 1.8 events per hour (excellent control). His morning headaches have resolved completely. He reports feeling rested for the first time in years. At 3-month review: blood pressure 128/78 mmHg on the same three medications — the hypertension that was attributed to stress was predominantly driven by untreated OSA. His cardiologist reviews his medication and reduces one antihypertensive.

Book a Consultation

Speak directly with our sleep specialist team. Home sleep testing or in-laboratory polysomnography. Monday to Saturday.

040-44885000Emergency line: 040-46324365

Key Facts

Quick Facts about OSA

The essential context: what OSA is, the systemic consequences, prevalence in India, and the STOP-Bang screening tool.

What it is

Obstructive sleep apnoea (OSA) occurs when the muscles supporting the upper airway — including the tongue, soft palate, and lateral pharyngeal walls — relax too much during sleep, causing the airway to repeatedly collapse. Each collapse (apnoea: complete blockage; hypopnoea: partial blockage) lasts at least 10 seconds and causes oxygen levels in the blood to fall. The falling oxygen triggers a brief arousal from sleep — usually not consciously noticed — that restores airway muscle tone and breathing. This cycle — collapse, oxygen drop, arousal, restoration, sleep again, collapse — can occur 5 to over 100 times per hour through the night.

The consequences

OSA is not just about snoring. Each oxygen desaturation and arousal produces a surge in sympathetic nervous system activity (adrenaline release), elevated blood pressure, and inflammatory cytokine release. Sustained across years of nightly events: hypertension (OSA is the most common secondary cause of treatment-resistant hypertension); increased risk of atrial fibrillation (3–4x); increased risk of stroke (2–3x); metabolic syndrome and type 2 diabetes; erectile dysfunction; and progressive cognitive impairment from chronic intermittent hypoxia. OSA doubles the risk of a road traffic accident from impaired daytime alertness.

How common in India

OSA affects an estimated 4–9% of the Indian adult population, representing 50–70 million people. It is more prevalent in India than global figures suggest because: Asian populations develop OSA at lower BMI than Western populations due to craniofacial factors (smaller jaw, retrognathia) that narrow the airway; obesity rates in India are rising rapidly; and awareness and diagnosis remain very low — fewer than 1% of Indian OSA patients have been diagnosed.

STOP-Bang Score

A validated 8-item screening tool for OSA: Snoring (loud), Tired (daytime), Observed (apnoeas witnessed), Pressure (blood pressure on treatment or high), BMI >35, Age >50, Neck circumference >40cm, Gender (male). Score 0–2: low risk. Score 3–4: intermediate risk. Score 5–8: high risk. At KIMS, the STOP-Bang is used to triage patients for formal sleep study, alongside the Epworth Sleepiness Scale.

Recognising OSA

Clinical Features of OSA

OSA produces a recognisable cluster of nocturnal and daytime symptoms — and a quietly accumulating cardiovascular risk burden.

Loud, habitual snoring — the most common presenting feature

Snoring occurs when the partially narrowed airway vibrates as air passes through. In OSA, the snoring is typically loud enough to be heard through walls, is present on most nights regardless of sleep position, and is often described by the bed partner as "machine-like" or "rhythmic, then stopping." The pauses in snoring (apnoeas) followed by gasping or choking sounds are the most clinically significant feature. Not everyone who snores has OSA, but most people with OSA snore.

Unrefreshing sleep and morning headache

The repeated arousals of OSA prevent the brain from progressing through the deep restorative stages of sleep. The person may spend 8 hours in bed but achieve only 2–3 hours of deep (Stage N3) sleep. The result: waking feeling exhausted, unrefreshed, and as tired as when they went to bed. The morning headache of OSA is caused by overnight CO2 retention and vascular dilation from the intermittent hypoxia; it is typically bifrontal, present on waking, and resolves within 1–2 hours of being upright.

Excessive daytime sleepiness — the most functionally disabling consequence

Chronic sleep fragmentation from repeated arousals produces excessive daytime sleepiness that impairs all aspects of functioning: concentration at work, driving safety (OSA doubles the risk of road accidents), mood (irritability, depression), and relationship quality. The Epworth Sleepiness Scale quantifies this: scores above 10 indicate abnormal sleepiness; OSA patients typically score 12–18.

Cardiovascular consequences — OSA as a cardiovascular risk factor

Each apnoea event produces: a surge in sympathetic nervous system activity (adrenaline release), raising heart rate and blood pressure; endothelial injury from oxidative stress; and systemic inflammation. Nightly across years: OSA is a significant independent risk factor for hypertension (present in approximately 40% of hypertensive patients), atrial fibrillation (3–4x increased risk), coronary artery disease, heart failure, and stroke (2–3x increased risk). Treatment-resistant hypertension that does not respond to three medications should prompt OSA investigation at KIMS. Every hypertensive patient with snoring or EDS should be screened.

Nocturnal awakening and nocturia

Many OSA patients wake repeatedly in the night — often attributing it to needing the toilet (nocturia) — when in reality the arousal from an apnoea precedes the urge to urinate, not the other way around. The arousal-triggered increase in atrial natriuretic peptide (ANP) from negative intrathoracic pressure during apnoeas stimulates urine production. Treating OSA with CPAP typically reduces nocturia significantly, often from 3–4 voids per night to 0–1.

Diagnosis at KIMS

The KIMS pathway combines validated screening tools with home or in-laboratory sleep studies, calibrated to the patient's clinical complexity.

Epworth Sleepiness Scale (ESS) and STOP-Bang — screening

ESS: 8 questions rating the chance of dozing in everyday situations (watching TV, as a passenger in a car, sitting in a meeting). Scored 0–24; >10 indicates abnormal daytime sleepiness requiring investigation. STOP-Bang: 8 yes/no questions (snoring, tiredness, observed apnoeas, blood pressure, BMI, age, neck circumference, male sex); scores ≥3 indicate moderate-high OSA risk. Both are completed at KIMS on the first visit.

Home sleep apnoea test (HSAT) — for uncomplicated OSA

A portable sleep study device worn at home, recording airflow (nasal cannula thermistor), respiratory effort (chest and abdominal belts), and oxygen saturation (pulse oximeter). Calculates the AHI from the recording time. HSAT is appropriate for patients with a high pre-test probability of OSA (STOP-Bang ≥3) without significant cardiac, respiratory, or neurological comorbidities. Faster, cheaper, and more convenient than in-laboratory PSG for straightforward OSA diagnosis. At KIMS, HSAT devices are loaned for home recording with same-day data analysis.

In-laboratory polysomnography (PSG) — the gold standard

Full PSG records: EEG (sleep staging), EOG, EMG, ECG, nasal airflow, thoracic and abdominal respiratory effort, oxygen saturation, and video monitoring. PSG is preferred when: HSAT is non-diagnostic; there is suspected additional sleep disorder (narcolepsy, RBD, PLMD); significant cardiac or respiratory comorbidity; or when CPAP titration in the laboratory is planned. PSG at KIMS is performed in a dedicated sleep study room by trained sleep technologists.

OSA severity classification by AHI

Mild OSA: AHI 5–14 events/hour. Moderate OSA: AHI 15–29 events/hour. Severe OSA: AHI ≥30 events/hour. Treatment decisions are guided by severity AND symptoms: mild OSA with significant symptoms (EDS, morning headache, cardiovascular risk factors) warrants CPAP; mild OSA without symptoms may be managed with lifestyle interventions and positional therapy alone.

Treatment

Treatment at KIMS

CPAP is the gold-standard treatment for moderate-severe OSA — but only when used. KIMS supports compliance actively and offers alternatives where appropriate.

Primary Treatment

CPAP Therapy — Gold Standard for Moderate-Severe OSA

Continuous Positive Airway Pressure (CPAP) works by delivering a gentle stream of air through a mask (nasal, full-face, or nasal pillow) that acts as a pneumatic splint — the positive air pressure prevents the airway from collapsing. CPAP eliminates apnoeas (residual AHI typically <2 events/hour on optimal CPAP), restores normal sleep architecture, normalises oxygen saturation, and produces the clinical improvements (resolved morning headache, improved daytime alertness, blood pressure reduction). At KIMS, CPAP is initiated with an auto-titrating device (APAP) that adjusts pressure breath-by-breath based on detected airflow limitation, then downloaded at 4 weeks to confirm compliance and efficacy and to set a fixed CPAP pressure.

Compliance Support

CPAP Compliance — the key determinant of benefit

CPAP only works when used. The clinical standard for adequate compliance is ≥4 hours per night on ≥70% of nights. Many patients struggle with CPAP initially — the mask interface, the pressure sensation, or claustrophobia. At KIMS, CPAP compliance is actively supported: mask fitting session with multiple interface options tried; humidifier addition to reduce airway dryness; pressure ramp (starting at low pressure and gradually increasing over 20–30 minutes after sleep onset) for pressure intolerance; APAP mode to avoid fixed high-pressure discomfort; and review of the download data at 4 weeks to troubleshoot any compliance issues.

Alternative Therapies

Alternatives to CPAP

Mandibular Advancement Device (MAD): a custom-fitted oral appliance that holds the lower jaw forward during sleep, increasing the pharyngeal airspace; effective for mild-moderate OSA (AHI 5–30); less effective than CPAP for severe OSA. Positional therapy: position-monitoring devices or specialised sleep positioning belts/pillows encourage lateral sleeping and reduce AHI in positional OSA. Weight loss: a 10% weight reduction produces approximately 26% reduction in AHI; bariatric surgery resolves severe OSA in the majority of morbidly obese patients. Surgical options: Uvulopalatopharyngoplasty (UPPP), tonsillectomy, nasal surgery, and hypoglossal nerve stimulation (Inspire therapy) for CPAP-intolerant patients with specific anatomical criteria.

Related Conditions

Obstructive Sleep Apnoea belongs to the family of sleep disorders managed at KIMS:

Narcolepsy REM Sleep Behaviour Disorder Kleine-Levin Syndrome Non-24-Hour Sleep-Wake Disorder

FAQs

Frequently Asked Questions

Yes — witnessed apnoeas (stopping breathing during sleep) are the most significant clinical feature of OSA, and they indicate a level of airway obstruction that is almost certainly causing significant nocturnal oxygen desaturation. Each apnoea that lasts more than 10 seconds during which oxygen levels fall is a cardiovascular and cerebrovascular stress event. Repeated hundreds of times per night, over years, this produces hypertension, atrial fibrillation, and increased stroke risk. At KIMS, a home sleep test can confirm OSA within 1–2 weeks of referral. The test is simple, non-invasive, and takes one night at home. CPAP therapy, once initiated, typically eliminates the apnoeas completely and produces rapid improvement in daytime energy and long-term cardiovascular risk. Call 040-44885000.

CPAP intolerance is one of the most common challenges in OSA management, and it is almost always addressable with the right interventions. The most common reasons for CPAP intolerance and their solutions: pressure too high — use APAP (auto-titrating) mode; mask leak or discomfort — try a different mask interface (nasal pillow, nasal cradle, or full-face mask); claustrophobia — desensitisation protocol (wearing the mask awake for increasing periods before sleep); dry mouth or nasal congestion — add a heated humidifier; difficulty exhaling against pressure — use CPAP with expiratory pressure relief (EPR) feature. At KIMS, we systematically address each barrier to CPAP tolerance. For patients who genuinely cannot use CPAP despite optimisation, a mandibular advancement device or hypoglossal nerve stimulation assessment can be arranged. Please call 040-44885000 for a CPAP troubleshooting review.

Yes — the decision to treat OSA is based on both the AHI severity AND the symptom burden. Mild OSA (AHI 5–14) with significant symptoms — particularly EDS severe enough to affect functioning, morning headache, and unrefreshing sleep — is an indication for CPAP therapy. The AHI threshold is a guide, not an absolute cutoff. Additionally: if you have cardiovascular risk factors (hypertension, diabetes, prior stroke), treating even mild OSA is recommended because of the cumulative cardiovascular risk of chronic intermittent hypoxia. At KIMS, the treatment decision for mild OSA is individualised based on symptoms, cardiovascular risk profile, and patient preference. Call 040-44885000.

Yes — and this is one of the most important cardiovascular benefits of CPAP therapy in OSA. Untreated OSA is the most common cause of secondary (treatable) hypertension. Multiple randomised trials show that CPAP in OSA patients with hypertension reduces systolic blood pressure by an average of 2–3 mmHg — which, at the population level, translates to meaningful reductions in stroke and heart attack risk. In patients with severe OSA and poorly controlled hypertension, the blood pressure reduction can be 5–10 mmHg or more. Some patients are able to reduce the number of antihypertensive medications they take after their OSA is treated. The blood pressure benefit is greatest in patients who are most compliant with CPAP use (≥6 hours per night). Call 040-44885000.

Yes — childhood OSA is common and important to diagnose and treat. In children, the most common cause is adenotonsillar hypertrophy (enlarged tonsils and adenoids) obstructing the airway — rather than the obesity and anatomical factors that dominate in adult OSA. Features of childhood OSA: loud snoring on most nights; mouth breathing during sleep; restless sleep with frequent position changes; bedwetting (nocturnal enuresis) that may be related to arousal-triggered urine production; daytime behavioral problems (hyperactivity, inattention) that are often the primary presenting complaint and can be misdiagnosed as ADHD; and in severe cases, growth retardation from the metabolic demands of OSA. At KIMS, childhood OSA is assessed with paediatric polysomnography, and tonsillectomy and adenoidectomy are arranged for appropriate cases in coordination with ENT surgery. Call 040-44885000.

The loud snoring. The morning headache. The blood pressure that three medications cannot control. The daytime exhaustion that no amount of sleep fixes.

Obstructive sleep apnoea is the most common and most undertreated neurological sleep disorder in India. At KIMS Neuroscience, Secunderabad, Hyderabad, home sleep testing and in-laboratory polysomnography, CPAP initiation and compliance support, and full OSA cardiovascular risk management are coordinated as one programme. Call 040-44885000.

040-44885000

International enquiries: info@kimsneurosciences.com