81894-8
ClinicalLiver ultrasound attenuation by transient elastography
Definition
A measure of the attenuation of the ultrasound signal (loss of energy) as it travels through and returns from the liver at 3.5 MHz, often reported simultaneously with liver stiffness [LOINC:77615-3]. Based on the principle that ultrasound propagation is affected by tissue fat content, the ultrasound attenuation measurement, referred to as Controlled Attenuation Parameter (CAP), is a measure of liver fat content (steatosis) and expressed in dB/m. Increasing steatosis is associated with higher levels of signal attenuation. [PMID: 22404722]
LOINC 6-Axis Classification
Component
Ultrasound attenuation
Property
Pres
Time Aspect
Pt
System
Liver
Scale Type
Qn
Method Type
US.transient elastography
Details
Class
RAD
Order/Observation
Both
Short Name
US.TE Liver attenuation
Related Names
Frequently Asked Questions
What is LOINC code 81894-8?
LOINC code 81894-8 identifies "Liver ultrasound attenuation by transient elastography". A measure of the attenuation of the ultrasound signal (loss of energy) as it travels through and returns from the liver at 3.5 MHz, often reported simultaneously with liver stiffness [LOINC:77615-3]. Based on the principle that ultrasound propagation is affected by tissue fat content, the ultrasound attenuation measurement, referred to as Controlled Attenuation Parameter (CAP), is a measure of liver fat content (steatosis) and expressed in dB/m. Increasing steatosis is associated with higher levels of signal attenuation. [PMID: 22404722]
What does 81894-8 measure?
This code measures Ultrasound attenuation in Liver. It belongs to the RAD class in the LOINC classification.
What is LOINC?
LOINC (Logical Observation Identifiers Names and Codes) is a universal standard for identifying laboratory and clinical observations. It is maintained by the Regenstrief Institute and used worldwide for health data exchange.