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The effects of pulsatile flow on the leukocyte depleti ng qualities of the Pall LG6 leukocyte depleting arterial line filter: a laboratory investigation

Department of Cardiac Surgery, Royal Postgraduate Medical School, Hammersmith Hospital, London

J. Fleming

Department of Cardiac Surgery, Royal Postgraduate Medical School, Hammersmith Hospital, London

KM Taylor

Department of Cardiac Surgery, Royal Postgraduate Medical School, Hammersmith Hospital, London

The Pall LG6 arterial line filter has, in a previous publication, demonstrated its inherent leukocyte depleting qualities. This initial study was however carried out under continuous flow conditions. The present study was designed to assess the effectiveness of the LG6 filter in performing this leukocyte removal function under the more dynamic conditions of pulsatile flow. In addition to leukocyte depletion, the general blood handling and degree of energy absorbtion associated with the LG6 and Stat-Prime filters was also assessed. The results demonstrated that the LG6 filter was unaffected by the flow regime employed in terms of leukocyte removal and platelet depletion. There was a higher level of measured haemolysis associated with the use of pulsatile rather than nonpulsatile flow, however, this was the case with both filter types and was not found to be the case when generated values were computed. The LG6 filter absorbed more energy than the Stat-Prime filter as reflected by energy equivalent pressure (EEP) measurement, but this difference did not reach a level which was considered to be clinically significant.

Perfusion, Vol. 7, No. 3, 227-232 (1992)
DOI: 10.1177/026765919200700308


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