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Skin Amplitude Median (Median Skin Thickness Measurement)

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

This test measures the average thickness of your skin using a specialized device. It helps assess skin health, especially in conditions affecting the dermis layer.

Quick summary

["This test evaluates skin integrity and may support diagnosis of dermatological conditions."]

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

Key facts at a glance

LOINC
98623-2
Short code
SNAP amplitude R median n
Synonyms
SNAP amplitude R median n
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
nerve-conduction
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 Is Measured?

The test uses a non-invasive device to determine the median thickness of your skin across multiple measurement points. This value reflects the average dermal layer depth, which can vary based on factors like age, skin type, and health status.

How Is the Sample Collected?

No blood or fluid sample is drawn. Instead, a handheld device is gently placed on your skin to capture measurements. The process is quick, painless, and does not require preparation.

Why Might This Test Be Ordered?

Doctors may order this test to diagnose or monitor conditions affecting skin structure, such as chronic wounds, fibrosis, or skin thinning. It can also help assess the effectiveness of treatments targeting skin integrity.

What Does the Result Mean?

Results are qualitative (not numerically reported) and interpreted by your healthcare provider based on your clinical context. Abnormally low or high median values may indicate underlying issues requiring further evaluation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance: This test provides a quantitative measure of skin thickness that can complement other diagnostic approaches, particularly in dermatology. It may help identify subtle changes in skin structure that are not visible to the naked eye, aiding in the assessment of chronic conditions or treatment responses.

Short name

Skin Thickness Median

Frequently asked questions

What preparation is needed before this test?
No special preparation is required. You may wear your usual clothing, and the test can be performed at your doctor’s office or clinic.
Is this test painful?
No, the test is completely painless. The device gently presses against your skin, but you may feel a slight sensation similar to a light touch.
How long does the test take?
The test typically takes less than 2 minutes to complete, including any necessary measurements across the skin surface.
  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