Horowitz index: Difference between revisions

Horowitz index
Horowitz index
LOINC	50982-8, 50984-4, 50983-6, 50985-1, 50986-9

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Revision as of 22:38, 26 July 2014

The Horowitz index (synonyms: oxygenation after Horowitz, Horowitz quotient) is a ratio used to assess lung function in patients, particularly those on ventilators. It is useful for evaluating the extent of damage to the lungs. The simple abbreviation as oxygenation can lead to confusion with other conceptualizations of oxygenation index.

The Horowitz index is defined as the ratio of partial pressure of oxygen in blood (PaO2), in millimeters of mercury, and the fraction of oxygen in the inhaled air (FIO2).

In healthy lungs is the Horowitz index depends on age and usually falls between 350 and 450. A value below 300 is indicative of a [[acute lung injury|moderately severe lung injury]. A value below 200 as a criterion for a severe injury.

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 | eMedicine       =
 | MeshID          =
-| LOINC           = {{LOINC|50984-4}}, {{LOINC|50989-3}}
+| LOINC           = {{LOINC|50982-8}}, {{LOINC|50984-4}}, {{LOINC|50983-6}}, {{LOINC|50985-1}}, {{LOINC|50986-9}}
 | HCPCSlevel2     =
 | Reference_range =
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-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 '''Horowitz index''' (synonyms: oxygenation after Horowitz, Horowitz quotient) is a ratio used to assess [[lung function]] in patients, particularly those on [[Mechanical ventilation|ventilators]]. It is useful for evaluating the extent of damage to the lungs. The simple abbreviation as oxygenation can lead to confusion with other conceptualizations of oxygenation index.
-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 ).
+The Horowitz index is defined as the ratio of [[partial pressure of oxygen]] in blood (PaO2), in [[mmHg|millimeters of mercury]], and the fraction of oxygen in the inhaled air (FIO2).
-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 ).
+In healthy lungs is the Horowitz index depends on age and usually falls between 350 and 450. A value below 300 is indicative of a [[acute lung injury|moderately severe lung injury]. A value below 200 as a criterion for a [[Acute respiratory distress syndrome|severe injury]].
 ==See also==
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 [[Category:Intensive care medicine]]
 {{medicine-stub}}