A-a O₂ Gradient
Assesses for degree of shunting and V/Q mismatch.
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Dr. H. Fred Helmholz
About the creator
H. Fred Helmholz, MD, (d. 2012) spent most of his career at the Mayo Graduate School of Medicine. He was active in most aspects of respiratory care which included research and clinical practice in high-altitude medicine, oxygen therapy, pulmonary function testing, and mechanical ventilation.
To view Dr. H. Fred Helmholz's publications, visit PubMed