50991-9
LaboratoryHorowitz index adjusted to patients actual temperature in Venous blood
Definition
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.
LOINC 6-Axis Classification
Component
Horowitz index^^adjusted to patient's actual temperature
Property
Ratio
Time Aspect
Pt
System
BldV+Inhl gas
Scale Type
Qn
Method Type
N/A
Details
Class
CHEM
Order/Observation
Both
Short Name
Horowitz index temp adj BldV+IhG-Rto
Display Name
Horowitz index adjusted to patient's actual temperature (BldV+Inhl gas) [Ratio]
Related Names
Frequently Asked Questions
What is LOINC code 50991-9?
LOINC code 50991-9 identifies "Horowitz index adjusted to patients actual temperature in Venous blood". 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.
What does 50991-9 measure?
This code measures Horowitz index^^adjusted to patient's actual temperature in BldV+Inhl gas. It belongs to the CHEM 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.