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Serum or plasma mass concentration of radius/ulna (bone mineral density or similar skeletal measurement)

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

This test measures the density of bone material in the radius or ulna (forearm bones) using a specialized imaging technique. It helps assess bone strength and identify conditions affecting bone health.

Quick summary

["This test helps evaluate bone density and potential risks of osteoporosis or other skeletal disorders."]

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

Key facts at a glance

LOINC
103537-7
Short code
XR Radius+Ulna 1V
Synonyms
XR Radius+Ulna 1V
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
xr
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 This Test Measures

The test uses advanced imaging to quantify the mass of mineral content in the forearm bones. This measurement reflects bone density, which is critical for determining bone health and resilience against fractures.

Why It’s Done

Doctors may order this test if you have symptoms of bone weakness, a history of fractures, or risk factors for osteoporosis (e.g., aging, hormonal imbalances, or certain medications). It’s also used in monitoring treatments for bone-related conditions.

How the Test Works

A small X-ray or specialized scan (like a dual-energy X-ray absorptiometry, or DXA scan) is performed on your forearm. The device captures data on bone density, which is then analyzed to provide a quantitative result.

Preparation Tips

No special preparation is needed. Wear comfortable clothing without metal fasteners, and avoid using lotions or creams on the forearm area the day of the test.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Bone mineral density (radius/ulna)

Frequently asked questions

How might my results affect my care?
Low bone density may indicate osteoporosis or other bone diseases, prompting further evaluation or treatment to strengthen bones. High density may suggest normal bone health, but results should be interpreted by your healthcare provider in context with your overall health.
What does a low bone density mean?
A low bone density result could signal increased fracture risk or an underlying condition affecting bone metabolism. Your doctor may recommend lifestyle changes, supplements, or medications to support bone health.
Can this test detect osteoporosis?
Yes, this test is commonly used as part of osteoporosis screening, though it may be combined with other assessments for a full evaluation.
  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