The benefits of using IV in-line filters in critically-ill preterm neonates remains to be demonstrated. This intervention in adults has also been challenged by several authors (Pearson 1996; Newell 1998). Friedland reported that certain drugs such as antibiotics may be retained in the filters causing a reduction in potency (Friedland 1985). On the other hand, there are no known adverse effects from the use of IV in-line filters.