Clinical observation has always been an important part of medical diagnosis. One aspect of clinical observation is the detection of Cyanosis which occurs when oxygen levels in the blood are dangerously depleted, it is indicated by a blueish discolouration in the skin. Cyanosis is associated with cold temperatures, heart failure, lung diseases and smothering. It is seen in infants at birth as a result of heart defects, respiratory distress syndrome, or lung and breathing problems. So it is important for medical staff to be able to reliably detect the onset of cyanosis by visual observation.
For cyanosis observation, medical lighting should have an appropriate power output in the red part of the visible spectrum, if the output is too low a patients skin colour may appear darker and he/she may be diagnosed as cyanosed when this is not the case. Conversely, if the output is too high it may mask the cyanosis and it may not be diagnosed when it is present. For a light to be COI (Cyanosis Observation Index) compliant, it needs to have a COI index of <3.3 as tested against AS 1680.2.5
Trend has a range of COI compliant lighting with a light output specifically designed to meet the requirements of visual cyanosis detection. This provides hospitals and medical centers with a long life alternative to traditionally expensive COI globes.