Influence of varying inspired oxygen tensions on the pulmonary venous admixture (shunt) of mechanically ventilated patients

Critical Care Medicine
A OlivenS Bursztein


Pulmonary venous admixture (shunt) was measured in 10 mechanically ventilated patients with respiratory failure at varying oxygen tensions. All patients manifested a drop in pulmonary shunt as FIO2 was increased from 0.21 to 0.4. Further increase in FIO2 led to a gradual increase in the calculated venous admixture. The clinical significance of the conventional measurements of pulmonary shunt at FIO2 = 1.0 is questionable because of the marked effect of FIO2 on pulmonary shunt. Consequently, shunt measurements should be performed with the clinically useful FIO2.


Jul 1, 1984·Canadian Anaesthetists' Society Journal·J F Nicholas, A M Lam
Jul 31, 1999·Archives of Medical Research·I Maulen-RadovanM Márquez Aguirre
Jan 1, 1997·Critical Care Medicine·M S Gowda, R A Klocke
Dec 4, 2008·Critical Care Medicine·Jérôme Allardet-ServentLaurent Papazian
Jan 1, 1995·Acta Anaesthesiologica Scandinavica. Supplementum·J H Wandrup
Feb 23, 2010·Critical Care Medicine·Cynthia M CelyAndrew A Quartin
May 16, 2006·Mathematical Biosciences·J P Whiteley
Sep 28, 2001·British Journal of Anaesthesia·C E Hahn
Aug 14, 2002·British Journal of Anaesthesia·J P WhiteleyC E Hahn
Apr 1, 1987·Journal of Clinical Monitoring·J C Cruz, P J Metting

Related Concepts

Inspiratory Capacity
Lung Volume Measurements
Monitoring, Physiologic
Positive End-Expiratory Pressure
Respiratory Distress Syndrome, Adult

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Alzheimer's Disease: MS4A

Variants within the membrane-spanning 4-domains subfamily A (MS4A) gene cluster have recently been implicated in Alzheimer's disease in genome-wide association studies. Here is the latest research on Alzheimer's disease and MS4A.

Pediculosis pubis

Pediculosis pubis is a disease caused by a parasitic insect known as Pthirus pubis, which infests human pubic hair, as well as other areas with hair including eye lashes. Here is the latest research.

Rh Isoimmunization

Rh isoimmunization is a potentially preventable condition that occasionally is associated with significant perinatal morbidity or mortality. Discover the latest research on Rh Isoimmunization here.

Genetic Screens in iPSC-derived Brain Cells

Genetic screening is a critical tool that can be employed to define and understand gene function and interaction. This feed focuses on genetic screens conducted using induced pluripotent stem cell (iPSC)-derived brain cells. It also follows CRISPR-Cas9 approaches to generating genetic mutants as a means of understanding the effect of genetics on phenotype.

Enzyme Evolution

This feed focuses on molecular models of enzyme evolution and new approaches (such as adaptive laboratory evolution) to metabolic engineering of microorganisms. Here is the latest research.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Pharmacology of Proteinopathies

This feed focuses on the pharmacology of proteinopathies - diseases in which proteins abnormally aggregate (i.e. Alzheimer’s, Parkinson’s, etc.). Discover the latest research in this field with this feed.

Alignment-free Sequence Analysis Tools

Alignment-free sequence analyses have been applied to problems ranging from whole-genome phylogeny to the classification of protein families, identification of horizontally transferred genes, and detection of recombined sequences. Here is the latest research.