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Respiratory System Response to Upper Respiratory Tract Stimulus (Probe)

Published: August 9, 2026Updated: August 16, 2026

This test measures how your respiratory system reacts to a mild stimulus applied to your upper airway, often used to assess breathing function or airway sensitivity.

Quick summary

["This helps doctors evaluate breathing patterns and airway responses during a clinical evaluation."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
85479-4
Short code
RSV RNA Upper resp Ql NAA+probe
Synonyms
RSV RNA Upper resp Ql NAA+probe
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What Does This Test Measure?

The test involves a controlled stimulus (like a gentle puff of air or chemical) applied to your nasal passages or throat to observe your breathing response. It may include measurements of airflow resistance, breathing effort, or changes in breathing patterns over time.

Why Might You Need This Test?

Doctors may order this test if you have symptoms like chronic cough, wheezing, or difficulty breathing, or if you’re being evaluated for conditions like asthma, chronic obstructive pulmonary disease (COPD), or other respiratory issues.

What to Expect During the Procedure

You’ll likely sit comfortably while a small device delivers the stimulus to your nose or mouth. Breathing patterns are monitored using sensors or a spirometer. The process usually takes a few minutes and may involve short pauses for observation.

Preparation and Restrictions

No special preparation is needed, but you may be asked to avoid certain medications (like asthma inhalers) that could affect breathing. Drink plenty of fluids the day of the test and avoid smoking or strong odors before it.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Upper Respiratory Probe Test

Frequently asked questions

How long does this test take?
The procedure itself typically takes about 5 to 15 minutes, depending on the number of stimuli applied. The full evaluation may include follow-up observations, so the total time could extend slightly.
Is this test painful?
No, the stimulus is mild and usually not uncomfortable. You may feel a slight tickle or pressure, but it shouldn’t cause pain. If you experience discomfort, let your healthcare provider know immediately.
Can I eat or drink before this test?
You can eat and drink normally before the test unless instructed otherwise by your doctor. Avoid alcohol or caffeine, as they may affect your breathing patterns.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy