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Reduction of Resuscitation Fluid Volumes in Severely Burned Patients Using Ascorbic Acid Administration
A Randomized, Prospective Study
Hideharu Tanaka, MD;
Takayoshi Matsuda, MD;
Yasusuke Miyagantani, MD;
Tetsuo Yukioka, MD;
Hiroharu Matsuda, MD;
Syuji Shimazaki, MD
Arch Surg. 2000;135:326-331.
Hypothesis High-dose ascorbic acid (vitamin C) therapy (66 mg/kg per hour) attenuates postburn lipid peroxidation, resuscitation fluid volume requirements, and edema generation in severely burned patients.
Study Design and Setting A prospective, randomized study at a university trauma and critical care center in Japan.
Subjects and Methods Thirty-seven patients with burns over more than 30% of their total body surface area (TBSA) hospitalized within 2 hours after injury were randomly divided into ascorbic acid and control groups. Fluid resuscitation was performed using Ringer lactate solution to maintain stable hemodynamic measurements and adequate urine output (0.5-1.0 mL/kg per hour). In the ascorbic acid group (n=19; mean burn size, 63% ± 26% TBSA; mean burn index, 57 ± 26; inhalation injury, 15/19), ascorbic acid was infused during the initial 24-hour study period. In the control group (n=18; mean burn size, 53% ± 17% TBSA; mean burn index, 47 ± 13; inhalation injury, 12/18), no ascorbic acid was infused. We compared hemodynamic and respiratory measurements, lipid peroxidation, and fluid balance for 96 hours after injury. Two-way analysis of variance and Tukey test were used to analyze the data.
Results Heart rate, mean arterial pressure, central venous pressure, arterial pH, base deficit, and urine outputs were equivalent in both groups. The 24-hour total fluid infusion volumes in the control and ascorbic acid groups were 5.5 ± 3.1 and 3.0 ± 1.7 mL/kg per percentage of burn area, respectively (P<.01). In the first 24 hours, the ascorbic acid group gained 9.2% ± 8.2% of pretreatment weight; controls, 17.8% ± 6.9%. Burned tissue water content was 6.1 ± 1.8 vs 2.6 ± 1.7 mL/g of dry weight in the control and ascorbic acid groups, respectively (P<.01). Fluid retention in the second 24 hours was also significantly reduced in the ascorbic acid group. In the control group, the ratio of PaO2 to fraction of inspired oxygen at 18, 24, 36, 48, and 72 hours after injury was less than that of the ascorbic acid group (P<.01). The length of mechanical ventilation in the control and ascorbic acid groups was 21.3 ± 15.6 and 12.1 ± 8.8 days, respectively (P<.05). Serum malondialdehyde levels were lower in the ascorbic acid group at 18, 24, and 36 hours after injury (P<.05).
Conclusions Adjuvant administration of high-dose ascorbic acid during the first 24 hours after thermal injury significantly reduces resuscitation fluid volume requirements, body weight gain, and wound edema. A reduction in the severity of respiratory dysfunction was also apparent in these patients.
From the Departments of Traumatology and Critical Care Medicine, Kyorin University, Tokyo, Japan (Drs Tanaka, Miyagantani, Yukioka, H. Matsuda, and Shimazaki); and the Burn Center, Cook County Hospital, Chicago, Ill (Dr T. Matsuda).
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