{"id":"ph-arterial","name":"Arterial Blood pH","shortName":"Arterial pH","aliases":["Arterial pH","pH, Arterial","pH (ABG)","pHa","Blood pH, Arterial","Arterial Blood pH","pH, Arterial Blood","pH (Arterial)","ABG pH","pH arterial"],"abbreviations":["pHa"],"loinc":[{"code":"2744-1","primary":true},{"code":"11558-4","primary":false},{"code":"2745-8","primary":false}],"specimen":"whole-blood","units":[{"ucum":"[pH]","display":"pH"}],"referenceRanges":[{"population":"Adults","low":7.35,"high":7.45,"unit":"[pH]","unitDisplay":"pH","note":"Reference interval for arterial blood, measured at 37 °C. Penn State Health and Northwell Health labs print the same 7.35 to 7.45. Venous blood runs a little lower (7.32 to 7.43 in one review), so venous gases have their own marker. Use the range on your own report first. Adults only; newborn and child ranges differ and are not included.","sources":[{"title":"Arterial Blood Gas (ABG) Test","url":"https://medlineplus.gov/lab-tests/arterial-blood-gas-abg-test/","publisher":"MedlinePlus, National Library of Medicine"},{"title":"Mastering blood gas interpretation: A practical guide for primary care providers","url":"https://doi.org/10.4102/safp.v67i1.6058","publisher":"South African Family Practice","year":2025},{"title":"Blood gas analysis: Clinical applications, interpretation and future directions (Review)","url":"https://doi.org/10.3892/mi.2025.291","publisher":"Medicine International","year":2026},{"title":"Blood Gas, Arterial","url":"https://pennstatehealth.org/pathology-test/blood-gas-arterial","publisher":"Penn State Health"},{"title":"Blood Gas Arterial","url":"https://labs.northwell.edu/epic/test/114134","publisher":"Northwell Health Laboratories"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"How acidic or basic your arterial blood is. The body holds it in a very narrow range, so small shifts matter.","url":"https://bloodtesttracker.com/markers/ph-arterial","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}