Liver ultrasound attenuation by transient elastography 81894-8
LOINC Code
| LOINC code | 81894-8 | ||
|---|---|---|---|
| name | Liver ultrasound attenuation by transient elastography | ||
| description | 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] | ||
| status | ACTIVE | ||
Fully-Specified Name | |||
| component | Ultrasound attenuation | ||
| property | Pres = Pressure | ||
| time | Pt = Point in time: To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements. | ||
| system | Liver | ||
| scale | Qn = Quantitative: The result of the test is a numeric value that relates to a continuous numeric scale. Reported either as an integer, a ratio, a real number, or a range. The test result value may optionally contain a relational operator from the set {<=, <, >, >=}. Valid values for a quantitative test are of the form "7", "-7", "7.4", "-7.4", "7.8912", "0.125", "<10", "<10.15", ">12000", 1-10, 1:256 | ||
| method | US.transient elastography | ||
Additional Names | |||
| short name | US.TE Liver attenuation | ||
Basic Attributes | |||
| class | RAD | ||
| type | 2 Clinical | ||
| order vs. observation | Both | ||
| example UCUM units | dB The Unified Code for Units of Measure (UCUM) is a code system intended to include all units of measures being contemporarily used in international science, engineering, and business (www.unitsofmeasure.org) | ||
| example unit | dB/m | ||
Associated Observations | |||
LOINC codes that represent optional associated observation(s) for a clinical observation or laboratory test. A LOINC term may represent a single associated observation or panel containing several associated observations. | |||
History/Usage | |||
| first released | |||
| last updated | 2.66 | ||
| last change type | MIN - change to field other than name | ||
Related Names | |||
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