A prospective study of energy and protein intakes in critically ill patients

Comparison of Different Early Enteral Feeding Formulas on Critically Ill Patients

Critically ill patients are physiologically unstable, often have complex hypermetabolic responses to trauma. These patients are facing a high risk of death, multi-organ failure, and prolonged ventilator use. Nutrition is one of therapy for critical illness, however, patients often experience malnutrition caused by disease severity, delays in feeding, and miscalculation of calorie needs. The study aims to evaluate clinical improvement in critically ill participants that were given 3 kinds of early enteral feeding formulas, which were control (5% Dextrose), high-protein polymeric, or oligomeric formulas. A total of 55 critically ill participants admitted to the intensive care unit (ICU) between October 2017-March 2018 and assigned in this controlled trial. Early enteral feeding was initiated within 24-48 h after ICU admission. Each enteral feeding group were categorized to traumatic brain injury (TBI) or non-TBI. The primary endpoints were changes in white blood cell count, Acute Physiologic and Chronic Health Evaluation (APACHE) II score, and Nutrition Risk in the Critically Ill (NUTRIC) score from baseline to day 3. Baseline characteristics were similar between control (n=22), high-protein polymeric (n=19) and oligomeric (n=14) groups. There were significant decreases for white blood cell count (13,262.5±6,963.51 to 11,687.5±7,420.92; p=0.041), APACHE II score (17.33±3.31 to 13.83±1.95; p=0.007), and NUTRIC scores changes (3.08±1.44 to 1.92±1.00; p=0.022) in non-TBI participants receiving highprotein polymeric compared those in control or oligomeric participants. But there is no significant clinical improvement in TBI patients. In conclusion, non-TBI patients benefit from early enteral feeding with high-protein polymeric formula.

Failure to achieve proteic goals in non-critical patients increases risk for death: Old discussion, ongoing problem

OBJECTIVES

Providing adequate nutritional support for hospitalized patients continues to be a challenge. The aim of this study was to evaluate the association of energy and protein provision with in-hospital mortality in non-critically ill patients.

METHODS

A retrospective study (2014-2016) was performed with all patients >18 y of age who were admitted to medical and surgical clinic wards and given exclusive enteral therapy. The mean of energy and protein was estimated per day and per kilogram of body mass from the enteral prescription data, over the entire period of hospitalization. A prescription mean was considered hypocaloric or hypoproteic at <20 kcal · kg · d^-1 or <0.8 g · kg · d^-1, respectively.

RESULTS

Of the 240 patients, 58.3% were >60 y of age and 60% were men. The frequencies of in-hospital mortality (19.2%) and malnutrition (78.8%) were high. The means of protein (0.75 g· kg· d^-1) and energy (17.60 kcal · kg · d^-1) were below the general recommendations and 37.8% did not reach a mean of 20 kcal · kg · d^-1 during the entire hospitalization period. Hypocaloric (hazard ratio [HR], 5.78; 95% confidence interval [CI], 1.59-21.04) and hypoproteic nutrition (HR, 3.69; 95% CI, 1.25-10.93) were predictors of all-cause in-hospital mortality in adjusted multivariate models. However, when we adjusted the hypoprotein nutrition by energy (non-protein calories to nitrogen ratio), hypoprotein nutrition seems to maintain the increased risk for death (HR, 3.15; 95% CI, 1.04-9.53).

CONCLUSIONS

Hypoproteic nutrition appears to be more significant than hypocaloric nutrition in predicting all-cause in-hospital mortality. Protocols should be implemented to ensure that target caloric and protein levels are reached as quickly as possible to optimize patient survival.

The diagnosis and NUTRIC score of critically ill patients in enteral nutrition are risk factors for the survival time in an intensive care unit?

Introduction

Objective: to investigate whether the caloric and protein deficits, the diagnosis and the NUTRIC score, behaved as risk factors associated to the survival time. Methods: prospective study with 82 critically ill patients in intensive care unit (ICU), with exclusive enteral nutritional therapy (EENT). We investigated the calorie and protein deficiencies of EENT, the NUTRIC score, and the inflammatory-nutritional index by the C-reactive protein-CRP/albumin. The data were analyzed using the Chi-square, Fisher, Mann-Whitney, Kruskal-Wallis, univariate and multiple Cox regressions and the Kaplan-Meyer method. Results: in the univariate Cox regression, one-year increase in age increased the risk of death by 4.1% (p=0.0009; HR=1.041) and one-day increase with intercurrent events, by 1.8% (p = 0.0485; HR = 1.018). In the multiple Cox regression, the clinical diagnosis (p = 0.0462, HR = 2.091) and the NUTRIC score ≥ 5 (p < 0.0001; HR = 5.740) were the variables that together were associated with the survival time. The critical caloric and protein deficits did not behave as death risk factors in this population. Kaplan-Meier curves showed that the probability of survival in 40 days was 28.1% with clinical diagnosis and 40.2% with surgical diagnosis. The mean survival time with NUTRIC score ≥ 5 was 17.4 days. The probability of survival at 40 days was 72.8% with NUTRIC score < 5 and 6.4% with NUTRIC score ≥ 5. Conclusion: caloric and protein deficits are not risk factors for mortality. Only the diagnosis and the NUTRIC score were considered risk factors associated with the survival time.

Use of Predictive Equations for Energy Prescription Results in Inaccurate Estimation in Trauma Patients

BACKGROUND

Overfeeding and underfeeding are associated with poor clinical outcomes. In the absence of indirect calorimetry (IC), the Society of Critical Care Medicine/ASPEN recommend prescribing 25-30 kcal/kg. The Harris-Benedict equation (HBE) multiplied by a stress factor is commonly applied in critically ill patients. We describe the difference between estimated and actual energy needs in critically injured patients.

METHODS

From March to November 2018, we collected demographics and energy needs determined by continuous IC (started within 4 days) in intubated adults. Ideal or adjusted body weight was used for 25-30 kcal/kg, and HBE was multiplied by a 1.3 stress factor (1.3HBE). Daily requirements up to 14 days, extubation, or death were calculated using all 3 methods and compared with IC.

RESULTS

Fifty-five subjects were included. Median age was 38 [27-58] years, 38 (69%) were male, body mass index was 28 [25-33] kg/m² , and Acute Physiology and Chronic Health Evaluation II score was 17 [14-24] Mechanism of injury was blunt (38, 69%), penetrating (9, 16%), and burn (8, 15%). By day 14, compared with measured energy requirements by IC, the other methods could result in a cumulative 1827-kcal (+7%) surplus (1.3HBE), a 1313-kcal (-5%) deficit (25 kcal/kg), or a 3950-kcal (+14%) surplus (30 kcal/kg) per patient over a median 9 days.

CONCLUSION

In critically injured patients, predictive equations for energy needs do not account for dynamic metabolic changes over time and could result in underfeeding or overfeeding. Adjusting daily prescription based on continuous IC may result in better individualized treatment.