Objective: To study the changes in plasma sodium level and blood erythrocyte after resuscitation with different fluid regimes at early postburn stage.
Methods: One hundred and fifty burn patients admitted to our burn ward were randomly divided into three groups based on the different regimes of fluid resuscitation, i.e. A (n = 50, resuscitation with balanced salt solution for to the patients with middle and small burn area, Na(+) = 130 mmol/L); B (n = 50, with the same regime as in group A for those with large burn area), and C (n = 50, with hypertonic saline resuscitation for those with large burn area, Na(+) = 174 mmol/L) groups. The fluid supplementation, and changes in plasma sodium level and blood erythrocyte count, and the mean corpuscular volume (MCV) were observed during 1st to 3rd post burn day (PBD).
Results: The average volume of fluid supplementation in C group was lower than that in A and B groups (P < 0.01), though the average sodium supplementation in C group was higher than that in B group within 3 PBDs (P < 0.01). The average plasma level of sodium in B group was obviously lower than that in C group within 3 PBDs (P < 0.05). Negative correlation between the plasma sodium level and burn index (BI) was observed in A and B group on 1 PBD (r = -0.84, P < 0.01). The plasma sodium level was in the lower margin of normal range (137.4 +/- 3.9) mmol/L in B group, while that in C group was in the higher margin of normal range with obvious difference compared with B and C groups (P < 0.05 or 0.01). The MCV in group was lower than that in B group on the 1st and 2nd PBD, i.e. (92.1 +/- 4.5) fl vs (95.5 +/- 5.5) fl on the 1st PBD, and (90.9 +/- 5.4) fl vs (93.2 +/- 6.4) fl on the 2nd PBD, P > 0.05).
Conclusion: The plasma sodium level was stable with milder degree of swelling of the erythrocytes when hypertonic saline resuscitation was given to patients with large burn area during early postburn stage.
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