venous admixture

ve·nous ad·mix·ture

(vē'nŭs ad'miks-chŭr)
The mingling in the pulmonary circulation of arterial blood and desaturated blood resulting from ventilation-perfusion mismatching (reduced ventilation with full perfusion).
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

venous admixture

A mixture of venous and arterial blood.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
The main cause of underestimation of p[O.sub.2] in arterialised capillary blood was insufficient arterialisation leading to a venous admixture, the effect of which depends upon the arteriovenous p[O.sub.2] difference.
(5) When evaluating the extent of thrombus delayed imaging should be used as typical portal-venous phase imaging is prone to artefactual filling defects due to venous admixture. (4,6,9)
In whole blood testing, as practiced in blood gases analysis, there are numerous sources of preanalytical error, some of which are: air contamination, post draw metabolism, abnormal cell count, liquid heparin dilution, venous admixture, specimen mixing and catheter flush.
The web version also includes calculators for drugs and venous admixture, together with a number of videos.