(469) 299-4800 Mon–Fri · Call for hours
Denton & Flower Mound, TX
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Pulmonary & sleep services

Comprehensive, advanced care for your lungs and sleep — from precise diagnostics to long-term management, all delivered with compassion.

Pulmonary Function Testing (PFT)

Comprehensive breathing tests that measure how well your lungs take in air, move it, and deliver oxygen to your blood. PFTs help us accurately diagnose asthma, COPD and other conditions — and track how your treatment is working over time.

Sleep Disorder Evaluation & Studies

Sleep evaluation and sleep studies for obstructive sleep apnea. We explain the testing process and help you understand the next steps in your care.

Hospital-Based Bronchoscopy

Bronchoscopy is performed in hospitals to examine the airways and support diagnosis. Our team will discuss the procedure and confirm the hospital arrangements with you.

Asthma & COPD Care

Long-term, personalized management plans to control symptoms, prevent flare-ups, and keep you active.

Lung Nodules & Cancer Diagnosis

Evaluation of lung nodules and lung cancer diagnosis. We focus on clear answers and guide you through the appropriate diagnostic steps.

Conditions We Treat

Expertise across lung & sleep health

We diagnose and manage a wide range of respiratory and sleep conditions. If you don't see yours listed, please reach out — we're here to help.

What To Expect

Thorough, unhurried, and clear

Every patient journey is a little different, but our commitment to careful, compassionate care never changes.

Evaluation

A detailed review of your symptoms, history and any prior imaging or tests.

Diagnosis

PFT, sleep studies and, when needed, bronchoscopy performed in a hospital to help identify the cause.

Treatment

A tailored plan with therapies, medications and lifestyle guidance that fit you.

Follow-Up

Regular check-ins to adjust your plan and keep you breathing your best.

Not sure which service you need?

That's exactly what we're here for. Call our office and Dr. Devasahayam will help you find the right path forward.