KnowraArterial blood gas testLinked fromLinked fromThe 15 pages that link to Arterial blood gas test, each with the reason it gives.All 15Related 12Compared with 3Pulse oximetryCompared with: Unlike pulse oximetry, it directly measures arterial oxygen partial pressure and can assess blood chemistry.Pulmonary function testingCompared with: It measures gas exchange directly in blood, unlike most pulmonary function tests.Near-infrared spectroscopyCompared with: It gives direct blood-gas measurements rather than a continuous local tissue estimate.