Horowitz index

== English == === Etymology === The ratio was first suggested in a 1974 paper by Joel H. Horovitz et al. The reason for the spelling with w is unclear. === Noun === Horowitz index (plural Horowitz indexes or Horowitz indices) (medicine, pulmonology) An assessment of lung function; the ratio of partial pressure of oxygen in blood (PaO2), and the fraction of oxygen in the inhaled air (FiO2). ==== Synonyms ==== Horowitz Horowitz ratio Horowitz quotient Horowitz number P/F ratio PaO2/FiO2 ratio Carrico index === References ===