Improved filter technology may enable the removal of specific substances such as
lipids from the blood. Lipids form a heterogeneous group of compounds, but
during surgery, the main interest is focussed on triglycerides, glycerol and
free fatty acids. Fat emboli have been demonstrated in the brain after cardiac
surgery and are associated with ischaemic brain injury. Fat emboli have also
been demonstrated in lung and kidney tissue.Lung tissue and leucocytes are
especially vulnerable to the effects of free fatty acids. The surgical wound
suction blood during cardiac surgery contains a considerable quantity of
microemboli. Therefore, as a first step to determining the place of fat
filtration during cardiac surgery, the use of a fat removal filter for surgical
wound suction blood is advocated.
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