Oxygen.arterial/Oxygen.alveolar:Partial Pressure Ratio:To identify measures at a point in time:Blood arterial+Resp.alv:Quantitative:Calculated

a/A PO2 Rto

Arterial-alveolar oxygen Partial pressure ratio

Oxygen.arterial/Oxygen.alveolar:PPresRto:Pt:BldA+Resp.alv:Qn:Calculated

Pt

2.73

78354-8

The arterial/alveolar oxygen tension ratio, also known as a/APO2, is a measure of gas-exchange. While it was originally believed to be less affected by the fraction of inspired oxygen (FiO2) compared to other measures such as the alveolar-arterial oxygen tension difference (PAO2-PaO2), the a/APO2 has been found to be somewhat dependent on FiO2, especially with higher degrees of pulmonary shunting. [PMID: 3742320]

Both

0

PPresRto

BldA+Resp.alv

PULM

2.54

ACTIVE

ABG; ALV; ART; Art bld; Art blood; Arterial; Arterial blood; Blood arterial; Calc; Calculation; Lung; O2; O2 A; Point in time; PULMONARY; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Respiratory; tO2

MIN

Qn

a/APO2=PaO2/PAO2, where PaO2 is arterial partial pressure of oxygen and PAO2 in alveolar partial pressure of oxygen

Oxygen.arterial/Oxygen.alveolar

ratio

Calculated

6140

2

T201

C4071120

{ratio}