Background: Oxidative stress produces molecular modifications of serum albumin that disturb its biological functions and interfere with its detection by the bromocresol green assay (BCG). Oxidative stress, inflammation, and hypoalbuminemia are common peritoneal dialysis (PD). This study aimed to evaluate the relationship between serum albumin, oxidized serum albumin (OSA), oncotic pressure, and blood pressure in hypoalbuminemic PD patients.
Methods: Twenty-four PD patients with serum albumin levels <3.5 g/dl enrolled in the study. Data were compared between participants with the mean arterial pressure (MAP) <105 mmHg (n = 12) and MAP ≥ 105 mmHg (n = 12).
Results: Serum albumin levels were ≤3.0 g/dl and similar in both groups (p = 0.298). The calculated OSA and oncotic pressure were significantly higher in patients with MAP ≥ 105 mmHg than in those with MAP < 105 mmHg. MAP was positively and marginally correlated with serum albumin levels (measured by BCG) (r = 0.34, p = 0.05), and positively and significantly correlated with the calculated OSA and oncotic pressure (r = 0.44, p = 0.015, r = 0.58, p = 0.002; respectively). The oncotic pressure was positively correlated with the calculated OSA (r = 0.47, p = 0.011).
Conclusion: OSA, undetectable by the commonly used BCG, may contribute to higher blood pressure in hypoalbuminemic PD patients.
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| http://dx.doi.org/10.1080/10641963.2016.1259333 | DOI Listing |
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