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Bone Mineral Densitometry

Bone Mineral Densitometry is a topic covered in the Davis's Lab & Diagnostic Tests.

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Synonym/Acronym:
BMD, DEXA, DXA, SXA, QCT, RA, ultrasound densitometry.

Dual-energy x-ray absorptiometry (DEXA, DXA): Two x-rays of different energy levels measure bone mineral density and predict risk of fracture.

Single-energy x-ray absorptiometry (SXA): A single-energy x-ray measures bone density at peripheral sites.

Quantitative computed tomography (QCT): QCT is used to examine the lumbar vertebrae. It measures trabecular and cortical bone density. Results are compared to a known standard. This test is the most expensive and involves the highest radiation dose of all techniques.

Radiographic absorptiometry (RA): A standard x-ray of the hand. Results are compared to a known standard.

Ultrasound densitometry: Studies bone mineral content in peripheral densitometry sites such as the heel or wrist. It is not as precise as x-ray techniques but is less expensive than other techniques.

Rationale
To evaluate bone density related to osteoporosis.

Patient Preparation
There are no food, fluid, activity, or medication restrictions unless by medical direction. Bone mineral density (BMD) should not be performed until 7 to 10 days after other radiological studies depending on the tracer and dose used.

Normal Findings

  • Normal bone mass with T-score value not less than –1.

Critical Findings and Potential Interventions
N/A

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Citation

Bladh, Mickey Lynn., and Anne M. Van Leeuwen. "Bone Mineral Densitometry." Davis's Lab & Diagnostic Tests, 7th ed., F.A. Davis Company, 2017. Nursing Central, nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425369/all/Bone_Mineral_Densitometry.
Bladh ML, Van Leeuwen AM. Bone Mineral Densitometry. Davis's Lab & Diagnostic Tests. 7th ed. F.A. Davis Company; 2017. https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425369/all/Bone_Mineral_Densitometry. Accessed July 21, 2019.
Bladh, M. L., & Van Leeuwen, A. M. (2017). Bone Mineral Densitometry. In Davis's Lab & Diagnostic Tests. Available from https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425369/all/Bone_Mineral_Densitometry
Bladh ML, Van Leeuwen AM. Bone Mineral Densitometry [Internet]. In: Davis's Lab & Diagnostic Tests. F.A. Davis Company; 2017. [cited 2019 July 21]. Available from: https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425369/all/Bone_Mineral_Densitometry.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - Bone Mineral Densitometry ID - 425369 A1 - Bladh,Mickey Lynn, AU - Van Leeuwen,Anne M, BT - Davis's Laboratory & Diagnostic Tests UR - https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425369/all/Bone_Mineral_Densitometry PB - F.A. Davis Company ET - 7 DB - Nursing Central DP - Unbound Medicine ER -