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Updated: Aug 12, 2026

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Published on: July 19, 2018
Hemodialysis hypoxemia: evaluation of mechanisms utilizing sequential ultrafiltration-dialysis
Abstract:
We studied the role of blood-dialyzer-membrane interactions in hemodialysis-induced hypoxemia by measuring PaO2 and white blood cell counts during isolated ultrafiltration (UF). These values were compared to those obtained from the same patients during subsequent hemodialysis (HD; utilizing the same dialyzer and membrane). Patients in the UF period displayed no hypoxemia, rather a slight increase in PaO2 (from 82.5 +/- 3.0 to 88.5 +/- 2.0 mm Hg, mean +/- SE, p greater than 0.05). In contrast, these patients displayed significant hypoxemia when HD was imposed (88.5 +/- 2.0-78.0 +/- 1.5 mm Hg, mean +/- SE, p less than 0.02). We suggest that the hypoxemia characteristic of HD initiation is not solely dependent on blood-dialyzer-membrane interactions, but also requires blood-dialysate interactions.
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