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Perfusion
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Particle separation using ultrasound can be used with human shed mediastinal blood

Henrik Jönsson

Department of Cardiothoracic Surgery, Center for Heart and Lung Disease, Lund University Hospital, Lund, Sweden, henrik.jonsson{at}thorax.lu.se

Andreas Nilsson

Department of Electrical Measurements, Lund Institute of Technology, Lund, Sweden

Filip Petersson

Department of Electrical Measurements, Lund Institute of Technology, Lund, Sweden

Mats Allers

Department of Cardiothoracic Surgery, Center for Heart and Lung Disease, Lund University Hospital, Lund, Sweden

Thomas Laurell

Department of Electrical Measurements, Lund Institute of Technology, Lund, Sweden

Background: Shed mediastinal blood collected by cardiotomy suction has been shown to be a large contributor to lipid microemboli ending up in different organs. The aim of this study was to test the separation efficiency on human shed blood of a new separation method developed to meet this demand.

Methods: Shed mediastinal blood collected from the pericardial cavity of 13 patients undergoing cardiac surgery with cardiopulmonary bypass was collected. The blood was processed in an eight-channel parallel PARSUS separator, and separation efficiency was determined.

Results: Erythrocyte recovery, in terms of a separation ratio, varied between 68% and 91%. Minor electrolyte changes took place, where levels of sodium increased and levels of potassium and calcium decreased.

Conclusion: This study demonstrates that PARSUS technology can be used on human shed mediastinal blood with good separation efficiency. The technology is, thereby, suggested to have future clinical relevance.

Perfusion, Vol. 20, No. 1, 39-43 (2005)
DOI: 10.1191/0267659105pf782oa
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