Fresno:7407 N Cedar Ave # 102, Fresno, CA 93720(559) 369-4421Fax (559) 369-4418
Merced:105 W El Portal Dr, Suite B, Merced, CA 95348(209) 349-8526Fax (209) 349-8518
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Spirometry / PFT

Spirometry & pulmonary function testing in Fresno & Merced, CA

Spirometry is a simple, in-office breathing test that measures how well your lungs move air. It's one of the most useful tools for diagnosing asthma, evaluating unexplained cough or shortness of breath, and understanding your lung function over time.

In-office, no downtimeResults reviewed same visitKids & adults
Spirometry testing in Fresno & Merced, CA
What it measures

A closer look at how you breathe

Airflow & lung capacity

How much air you can move, and how quickly — the core numbers behind an asthma or lung-function evaluation.

Response to treatment

We can retest after an inhaler to see how your airways respond, which helps confirm a diagnosis and guide your plan.

Why we use it

Where spirometry fits into your care

Diagnosing asthma

Confirms airway narrowing and helps determine severity, alongside your symptoms and history.

Asthma care →

Evaluating lung function over time

Used to track how your breathing is trending, including as part of a broader evaluation that can involve airflow patterns associated with COPD.

Chronic cough

Helps rule in or out an airway cause when a cough has lasted more than 8 weeks.

Chronic cough →
What to expect

A quick, in-office test

1

Preparation

We'll let you know ahead of time if you should pause certain inhalers before your test.

2

The test

You'll breathe into a mouthpiece for a few short, guided breaths — typically done in under 15 minutes.

3

Results

We review your numbers with you during the same visit.

4

Plan

Results are combined with your history and any other testing to shape next steps.

FAQs

Frequently asked questions

Does spirometry hurt?

No — it's not invasive. You breathe into a mouthpiece; some people find the deep breaths a little tiring, but it isn't painful.

How long does the test take?

The test itself is usually done in under 15 minutes, though your full visit may include other evaluation as well.

Will I need to stop my medications before testing?

Sometimes — we'll give you specific guidance about inhalers or other medications when you book.

Can children have spirometry done?

Yes, for children old enough to follow the breathing instructions consistently — we'll let you know if it's the right test for your child.

Is spirometry used for COPD too?

Spirometry is a standard tool for evaluating airflow, which can be part of a broader COPD evaluation. Talk with us about your specific history and symptoms.

Understand your breathing.

Book a visit and we'll help determine whether spirometry fits your evaluation.

General information only — not medical advice. Please consult a qualified provider for assessment. Sierra Allergy works with many insurance plans; contact us to verify your coverage.