50991-9
LOINC Code
| LOINC code | 50991-9 | |
|---|---|---|
| name | ||
| description | A ratio with numerator = venous oxygen partial pressure (PaO2) in mmHg and denominator = fraction of inspired oxygen (FIO2) with no units. If the patient is breathing room air (20% O2) the fraction would be 0.20. It is reported in mmHg. It is a well established marker for lung function during mechanical ventilation and used in many acuity scores like SAPS II, SAPS III, and SOFA. | |
| status | ACTIVE | |
Fully-Specified Name | ||
| component | Horowitz index^^adjusted to patient's actual temperature | |
| property | Ratio | |
| 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 | BldV+Inhl gas Inhl gas = Inhaled gas BldV = Blood venous | |
| 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 | ||
Additional Names | ||
| short name | adj; Bld ven; Bld venous; BldV+IhG; Blood - venous; Blood gas ven; Blood ven; Blood venus; Chemistry; Gases; IhG; Inhaled Gas; Inspired; PaO2/FiO2; Point in time; QNT; Quan; Quant; Quantitative; Random; Ratios; Rto; S prime; Temp; temp adj; Venous | |
Basic Attributes | ||
| class | CHEM | |
| type | 1 Laboratory | |
| order vs. observation | Horowitz index | |
| formula (readable) | arterial oxygen partial pressure [(PaO2) in mmHg]/ fraction of inspired oxygen | |
History/Usage | ||
| first released | ||
| last updated | 2.73 | |
| last change type | MIN - change to field other than name | |
Related Names | ||
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