1. Anesthesia machine flush valve malfunction: detection, implications and resolution 
David S Hodgson 
Veterinary Anaesthesia and Analgesia 
Volume 42, Issue 5, Pages (September 2015)
DOI: /vaa.12291
Copyright © 2015 Association of Veterinary Anaesthetists and American College of Veterinary Anesthesia and Analgesia Terms and Conditions

2. Figure 1
Bubbles of oxygen leaking through a defective flush valve are observed when an adapter from the fresh gas outlet is submerged in water.
Veterinary Anaesthesia and Analgesia  , DOI: ( /vaa.12291)
Copyright © 2015 Association of Veterinary Anaesthetists and American College of Veterinary Anesthesia and Analgesia Terms and Conditions