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Volume 40 Issue 7
Jul.  2024
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Article Navigation >  CHINESE JOURNAL OF BURNS AND WOUNDS  > 2024  >  40(7): 634-642
Zou W,Han CM,Jin RH,et al.Selection and analysis of calculation formulas for resting energy expenditure in patients with severe burns based on different metabolic stages[J].Chin J Burns Wounds,2024,40(7):634-642.DOI: 10.3760/cma.j.cn501225-20240229-00080.
Citation: Zou W,Han CM,Jin RH,et al.Selection and analysis of calculation formulas for resting energy expenditure in patients with severe burns based on different metabolic stages[J].Chin J Burns Wounds,2024,40(7):634-642.DOI: 10.3760/cma.j.cn501225-20240229-00080.
shu

Selection and analysis of calculation formulas for resting energy expenditure in patients with severe burns based on different metabolic stages

doi: 10.3760/cma.j.cn501225-20240229-00080

  • Department of Burn and Wound Repair, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China

Funds:

Youth Fund of the National Natural Science Foundation of China 82202443

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  • Corresponding author: Han Chunmao, Email: zrssk@zju.edu.cn
  • Received Date: 2024-02-29
    Abstract
  •   Objective  To explore the changes in resting energy expenditure (REE) values in patients with severe burns under different metabolic stages and the selection of the optimal calculation formula.  Methods  This study was a retrospective and observational study. From April 2020 to December 2023, 40 patients (32 males and 8 females, aged (54±17) years) with severe burns meeting inclusion criteria were treated in the Second Affiliated Hospital of Zhejiang University School of Medicine. After admission, the patients were given routine clinical treatments such as sedation and analgesia, debridement, and skin grafting. At 3, 5, 7, 9, 11, 14 days after injury and every 7 days thereafter, the REE values (i.e., REE measured values) were measured by indirect calorimetry in patients with severe burns who met the measurement conditions till the patients recovered or died. On the day the patient's REE was measured, Milner, Hangang, the Third Military Medical University, Carlson, and Peng Xi team's linear formula were used respectively to calculate the REE value (i.e., REE formula values). The post-injury time to measure REE in patients was calculated, and the clinical characteristics of patients in acute inhibition, hypermetabolic, metabolic balance, and metabolic remodeling phases were compared. The REE measured values and the difference between the REE formula values and the REE measured values of patients under the 4 different metabolic phases were calculated.Compared with the REE measured values, the 10% accuracy rate and 20% accuracy rate were calculated to evaluate the accuracy of the REE formula values. The absolute percentage error (APE) of the REE formula values were calculated to evaluate the deviation. The metabolic formula (i.e., the optimal calculation formula) that was closest to the measured REE values was screened out, and further exploration was conducted to identify the key factors that affected the accuracy of the optimal calculation formula under different metabolic phases.  Results  The post-injury time to measure REE in patients with severe burns was (40±19) days. Comparisons showed that under the 4 different metabolic phases, patients in the metabolic remodeling phase had the highest age, height, weight, body mass index, total body surface area. Age in the metabolic remodeling phase was significantly higher than that in the acute inhibition and hypermetabolic phases (with t values of -3.02 and -4.20, respectively, with all P values <0.05), weight was significantly higher than that in the hypermetabolic and metabolic balance phases (with t values of -1.97 and -2.61, respectively, with all P values <0.05), body mass index was significantly higher than that in the hypermetabolic phase (t=-2.90, P<0.05), and total body surface area was significantly larger than that in the hypermetabolic and metabolic balance phases (with t values of -2.02 and -2.27, respectively, with all P values <0.05). There was no significant change in patients' REE measured values under the 4 different metabolic stages (P>0.05). Except for the Peng Xi team's linear formula (P>0.05), the difference between REE measured values and REE formula values calculated by using Milner, Hangang, the Third Military Medical University, and Carlson formulas respectively was statistically significant under different metabolic stages (with H values of 14.50, 27.15, and 37.26, respectively, F=11.80, P<0.05). Comprehensive analysis of 10% accuracy, 20% accuracy, and APE showed that in the acute inhibition phase, the REE formula values calculated by Peng Xi team's linear formula was closest to REE measured values, and the APE of the REE formula values calculated by Peng Xi team's linear formula was significantly lower than those calculated by Milner formula, Hangang formula, the Third Military Medical University formula, and Carlson formula (with t values of 9.00, -2.10, 5.95, and 6.68, respectively, with all P values <0.05). In the hypermetabolic phase, the REE formula values calculated by Hangang formula were closest to REE measured values, with significantly lower APE of the REE formula values calculated by Hangang formula than those calculated by using Milner formula, the Third Military Medical University formula, Carlson formula, and Peng Xi team's linear formula (with t values of 10.20, 10.33, 10.65, and 5.87, respectively, with all P values <0.05). In the metabolic balance phase, the REE formula values calculated by Hangang formula were again closest to REE measured values, with significantly lower APE of the REE formula values calculated by Hangang formula than those calculated by Milner formula, the Third Military Medical University formula, and Carlson formula (with t values of 7.11, 8.52, and 8.60, respectively, with all P values <0.05). In the metabolic remodeling phase, the REE formula values calculated by the Third Military Medical University were closest to REE measured values, with significantly lower APE of the REE formula values calculated by the Third Military Medical University formula than those calculated by Milner formula, Hangang formula, and Carlson formula (with t values of 5.12, 2.45, and 6.26, respectively, with all P values <0.05). No significant key factors affected the accuracy of the Peng Xi team's linear formula in the acute inhibition phase (P>0.05). In the hypermetabolic phase, total burn area was a key factor affecting the accuracy of Hangang formula (with odds ratio of 1.00, with 95% confidence interval of 1.00-1.10, P<0.05). In the metabolic balance phase, post-injury days was a key factor affecting the accuracy of Hangang formula (with odds ratio of 1.30, with 95% confidence interval of 1.10-1.40, P<0.05). In the metabolic remodeling phase, no significant key factors affected the accuracy of the Third Military Medical University formula (P>0.05).  Conclusions  When calculating REE values in patients with severe burns, it is recommended to use the Peng Xi team's linear formula during the acute inhibition phase, the Hangang formula during the hypermetabolic and metabolic balance phases, and the Third Military Medical University formula during the metabolic remodeling phase. Additionally, it is crucial to ensure the accuracy of key factors affecting the optimal calculation formula in the hypermetabolic and metabolic balance phases.

     

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