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- R Ganss, H P Aarseth, and G Nordby.
- Department of Internal Medicine, Ullevaal Hospital, University of Oslo, Norway.
- ASAIO J. 1992 Oct 1; 38 (4): 820-2.
AbstractHypoxemia during acetate dialysis is caused by hypoventilation due to bicarbonate loss across the dialyzer and its regeneration from acetate by a CO2 consuming process. Loss of bicarbonate is prevented by using a bicarbonate containing dialysate, but hypoxemia is still found by many authors. In the current study, ten patients were dialyzed twice against acetate dialysate, high concentration bicarbonate (36 mmol/L), and low concentration bicarbonate (29 mmol/L) dialysates. A significant decrease in PO2 was found during both acetate and high concentration bicarbonate dialysis. Hypoxemia was prevented by low concentration bicarbonate dialysate. A possible explanation for the hypoxemia in high concentration bicarbonate dialysis may be hypoventilation induced by alkalosis. It was concluded that low concentration bicarbonate dialysate prevents hypoxemia during hemodialysis.
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