94123-7

LOINC code 94123-7 identifies "Pulmonary artery End diastolic blood pressure by Cardiac catheterization". Diastolic pulmonary artery pressure (dPAP) is used with pulmonary artery wedge pressure (PAWP) to help distinguish post-capillary pulmonary hypertension from combined post- and pre-capillary pulmonary hypertension associated with left heart failure. The diastolic pressure gradient (DPG) is calculated as dPAP minus PAWP, and is an alternate to the transpulmonary pressure gradient (TPG), which is calculated as the mean pulmonary artery pressure (mPAP) minus PAWP. An elevated DPG or TPG indicates that the increase in pulmonary pressure is not solely due to increased PAWP (post-capillary), but rather has a pre-capillary component as well, as reflected in an dPAP/mPAP increase out of proportion to PAWP. [PMID: 27587711]

This code measures Intravascular end diastolic in Pulmonary artery. It belongs to the BP.CENT.MOLEC class in the LOINC classification.

LOINC (Logical Observation Identifiers Names and Codes) is a universal standard for identifying laboratory and clinical observations. It is maintained by the Regenstrief Institute and used worldwide for health data exchange.