Horowitz index

Horowitz index
Horowitz index
LOINC	50984-4, 50989-3

The Horovitz quotient (synonyms: oxygenation after Horovitz , Horowitz-index ) is mainly in the intensive care used parameter for lung function , with the extent of damage to the lungs can be described. The simple abbreviation as oxygenation can lead to confusion with other conceptualizations of oxygenation index OI lead.

The Horovitz quotient is defined as the ratio of arterial oxygen partial pressure (paO 2 , see, blood gas analysis ) and the concentration of oxygen in the inhaled air (inspiratory oxygen concentration, FiO 2 ).

In healthy lungs is the Horovitz-quotient depends on age usually between 350 and 450 A value below 300 is indicative of a moderately severe lung injury ( acute lung injury , ALI), a value below 200 as a criterion for a severe lung injury ( acute respiratory distress syndrome , ARDS ).

See also