Fetal Head Circumference estimated from gestational age by method of Chitty 1994 (US) 33174-4
LOINC Code
| LOINC code | 33174-4 | ||
|---|---|---|---|
| name | Fetal Head Circumference estimated from gestational age by method of Chitty 1994 (US) | ||
| status | ACTIVE | ||
Fully-Specified Name | |||
| component | Perimeter | ||
| property | Len = Length | ||
| 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 | Head^Fetus | ||
| 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.estimated from Chitty 1994 | ||
Additional Names | |||
| short name | Fet Head Circum from GA.Chitty94 | ||
Basic Attributes | |||
| class | OB.US | ||
| type | 2 Clinical | ||
| order vs. observation | Observation | ||
| formula (readable) | Head Circumference from gestational age: HC = -109.9 +15.16* MA- 0.002388*MA3; SD = 3.644+0.2311*MA; Limits: 12-42 weeks; HC (mm) from 59-368 | ||
| example UCUM units | mm 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 | mm | ||
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 | 2.70 | ||
| last change type | MIN - change to field other than name | ||
Related Names | |||
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