Prevalencia de desnutrición en niños al ingreso hospitalario en 9 países latinoamericanos y análisis de sus factores asociados

RESUMEN Introducción: La desnutrición continúa siendo una causa frecuente de aumento de la morbimortalidad, especialmente en pacientes hospitalizados. Objetivo: Evaluar la tasa de desnutrición infantil observada al ingreso hospitalario en nueve países latinoamericanos y estimar el impacto de diversas condicionantes que pueden incidir en su desarrollo. Materiales y Métodos: Estudio descriptivo, transversal de niños de ambos sexos, de 0 a 18 años de edad, hospitalizados en nueve países latinoamericanos (Argentina, Chile, Cuba, Guatemala, México, Panamá, Paraguay, Uruguay y Venezuela). La información se obtuvo mediante encuesta y antropometría efectuada durante las primeras 48 horas de ingresados. Para la evaluación nutricional se evaluó el peso y la talla de los niños de acuerdo a los estándares de la Organización Mundial de la Salud (OMS). El análisis estadístico se realizó en el programa SPSS versión 24. Resultados: Del total de 5.366 pacientes, 45,2% eran mujeres y 46,5% menores de 2 años. Un 50,2% eran eutróficos, un 15,4% presentaba riesgo de desnutrir o desnutrición leve, un 12,5% desnutrición, un 14,2% sobrepeso o riesgo de obesidad, y un 7,7% obesidad. El 20,5% eran de talla baja. Los niños con 4 o más hospitalizaciones previas tuvieron mayor riesgo de presentar malnutrición por déficit (OR = 1,7). Las patologías cardiológicas presentaron un OR = 1,8 de presentar malnutrición por déficit. Conclusiones: La prevalencia de desnutrición en niños al ingreso hospitalario es moderada y se relaciona especialmente a patología cardiológica y a los antecedentes de varias hospitalizaciones previas.

ABSTRACT Introduction: Malnutrition continues to be a frequent cause of increased morbidity and mortality, especially in hospitalized patients. Objective: To evaluate the observed infant malnutrition rate at hospital admission in nine Latin American countries and to estimate the impact of various conditions that may affect their development. Materials and Methods: This was a descriptive, cross-sectional study of children of both sexes, from 0 to 18 years of age, hospitalized in nine Latin American countries (Argentina, Chile, Cuba, Guatemala, Mexico, Panama, Paraguay, Uruguay and Venezuela). The information was obtained through a survey and anthropometry carried out during the first 48 hours after admission. For the nutritional evaluation, the weight and height of the children were evaluated according to the standards of the World Health Organization (WHO). Statistical analysis was performed using SPSS version 24. Results: Of the total of 5,366 patients, 45.2% were female and 46.5% were under 2 years of age. 50.2% were eutrophic, 15.4% had a risk of malnutrition or mild malnutrition, 12.5% malnutrition, 14.2% overweight or at risk of obesity, and 7.7% were obese. 20.5% were short. Children with 4 or more previous hospitalizations had a higher risk of presenting deficiency malnutrition (OR = 1.7). Patients with cardiological pathologies presented an OR = 1.8 of presenting deficiency malnutrition. Conclusions: The prevalence of malnutrition in children at hospital admission is moderate and is especially related to cardiac pathology and a history of several previous hospitalizations.

Intake of Non-Nutritive Sweeteners in Chilean Children after Enforcement of a New Food Labeling Law that Regulates Added Sugar Content in Processed Foods.

After enforcement of a new food labeling law in 2016, Chile exhibits a greater offer to reduced sugar products with addition of non-nutritive sweeteners (NNS). Many of these products are consumed by children, who are at greater risk of reaching the acceptable daily intake (ADI) of these food additives. The objective of this study was to evaluate the intake levels of NNS in Chilean schoolchildren after the enactment of the aforementioned law. A total of 250 Chilean children 6-12 years old were surveyed. NNS intake was assessed through a food frequency questionnaire. All children evaluated consumed at least one NNS during the previous month. Sucralose had the highest consumption frequency reaching 99.2%, followed by acesulfame-K (92.8%), stevia (86.0%), and aspartame (85.2%). Aspartame showed the highest median intake, which came mainly from beverages (96%). No children exceeded the ADI of any NNS. Smaller children exhibited a higher body weight-adjusted intake of sucralose, acesulfame-K, stevia, and aspartame (p < 0.05). In Chile, a wide range of processed foods with NNSs is available and all schoolchildren evaluated consumed at least one product containing NNS. However, this consumption does not exceed defined ADIs for any of the six sweeteners authorized for food use in Chile.

Clinical profile of children with diabetic ketoacidosis in fifteen years of management in a Critical Care Unit. / Perfil clínico de niños con cetoacidosis diabética en una Unidad de Paciente Crítico.

INTRODUCTION: Diabetic ketoacidosis (DKA) is the main cause of morbidity and mortality in children with type 1 diabetes mellitus (T1DM) due to clinical and biochemical alterations associated, cerebral edema as one of the most critical because of the high mortality rates and long-term neurological se quelae. OBJECTIVE: To analyze the clinical characteristics and complications of patients with DKA ad mitted to a pediatric intensive care unit. PATIENTS AND METHODS: Retrospective study of DKA patients treated at the Hospital Clínico, Pontificia Universidad Católica de Chile (UPCPUC) between 2000 and 2015. Demographic characteristics, clinical manifestations, biochemical alterations, treatment, complications, and prognosis were assessed. Patients with T1DM onset were compared with those patients already diagnosed with diabetes, analyzing variables according to distribution. RESULTS: 46 DKA events were identified, 67% of them were the first episode of DKA. 66% of patients already diagnosed with diabetes were admitted due to poor adherence to treatment. The main symptoms described were: 63% polydipsia, 56% polyuria, 48% vomiting, 39% weight loss and 35% abdominal pain, and mean blood sugar levels of 522 mg/dL, pH 7.17, and plasma osmolality of 305 mOsm/L. 89% of patients received insulin infusion, and 37% presented hypokalemia. No episodes of cerebral edema or deaths were registered. CONCLUSIONS: Most of the DKA admissions were due to T1DM onset. In the group of patients already diagnosed with diabetes, the poor adherence to treatment was the main cause of decompensation. There were no serious complications or deaths associated with DKA management during the studied period. Early diagnosis and proper and standardized treatment contributed to reducing morbidity and mortality in children with DKA.

Perfil clínico de niños con cetoacidosis diabética en una unidad de paciente crítico / Clinical profile of children with diabetic ketoacidosis in a critical care unit

INTRODUCCIÓN: La cetoacidosis (CAD) es la principal causa de morbimortalidad en niños con diabetes mellitus tipo 1 (DM1) debido a las alteraciones bioquímicas asociadas, siendo el más temido el edema cerebral, con altas tasas de mortalidad y secuelas neurológicas a largo plazo. OBJETIVO: caracterizar el perfil clínico y las complicaciones de pacientes con CAD ingresados en una unidad de paciente crítico pediátrico. PACIENTES Y MÉTODO: Revisión retrospectiva de pacientes con CAD atendidos en el Hospital Clínico de la Pontificia Universidad Católica de Chile (UPCPUC) entre los años 2000 y 2015. Se evaluaron características demográficas, manifestaciones clínicas, alteraciones bioquímicas, tratamiento, complicaciones y pronóstico. Se compararon pacientes con debut de DM1 versus diabéticos conocidos, analizándose variables según distribución. RESULTADOS: Se identificaron 46 episodios de CAD. El 67% de éstos correspondió a un debut de DM1. El 66% de los diabéticos conocidos ingresaron por mala adherencia al tratamiento. Los principales síntomas de presentación fueron: 63% polidipsia, 56% poliuria, 48% vómitos, 39% pérdida de peso y 35% dolor abdominal, con medias de Glicemia 522 mg/dL, pH 7,17 y osmolaridad plasmática 305 mOsm/L. El 89% recibió insulina en infusión. El 37% presentó hipokalemia. No se registraron episodios de edema cerebral ni muertes. CONCLUSIONES: La mayoría de los ingresos por CAD correspondió a debut de DM1. En el grupo de diabéticos conocidos, la mala adherencia al tratamiento fue la principal causa de descompensación. No se presentaron complicaciones graves ni muertes asociadas al manejo de la CAD durante el período estudiado. El diagnóstico precoz y el tratamiento adecuado y estandarizado pudieran contribuir a reducir la morbilidad y mortalidad en niños con CAD.

INTRODUCTION: Diabetic ketoacidosis (DKA) is the main cause of morbidity and mortality in children with type 1 diabetes mellitus (T1DM) due to clinical and biochemical alterations associated, cerebral edema as one of the most critical because of the high mortality rates and long-term neurological se quelae. OBJECTIVE: To analyze the clinical characteristics and complications of patients with DKA ad mitted to a pediatric intensive care unit. PATIENTS AND METHODS: Retrospective study of DKA patients treated at the Hospital Clínico, Pontificia Universidad Católica de Chile (UPCPUC) between 2000 and 2015. Demographic characteristics, clinical manifestations, biochemical alterations, treatment, complications, and prognosis were assessed. Patients with T1DM onset were compared with those patients already diagnosed with diabetes, analyzing variables according to distribution. RESULTS: 46 DKA events were identified, 67% of them were the first episode of DKA. 66% of patients already diagnosed with diabetes were admitted due to poor adherence to treatment. The main symptoms described were: 63% polydipsia, 56% polyuria, 48% vomiting, 39% weight loss and 35% abdominal pain, and mean blood sugar levels of 522 mg/dL, pH 7.17, and plasma osmolality of 305 mOsm/L. 89% of patients received insulin infusion, and 37% presented hypokalemia. No episodes of cerebral edema or deaths were registered. CONCLUSIONS: Most of the DKA admissions were due to T1DM onset. In the group of patients already diagnosed with diabetes, the poor adherence to treatment was the main cause of decompensation. There were no serious complications or deaths associated with DKA management during the studied period. Early diagnosis and proper and standardized treatment contributed to reducing morbidity and mortality in children with DKA.

Evaluación nutricional en niños hospitalizados en un Servicio de Pediatría / Nutritional assessment in hospitalized children in a Paediatric service

Introducción: En niños hospitalizados la malnutrición está asociada a mayor morbimortalidad. Objetivo: Evaluar el estado nutricional de niños hospitalizados en el servicio de pediatría y su asociación con algunos factores. Pacientes y método: Estudio transversal retrospectivo. Se evaluaron menores de 17 años, hospitalizados entre noviembre de 2010 y abril de 2011. Se obtuvieron los datos demográficos, motivo de ingreso, exámenes (albuminemia, hemoglobina, hematocrito), estancia hospitalaria y antropometría. El diagnóstico nutricional se expresó en desviaciones estándar (DS) de peso para la talla según la OMS en menores de 5 años e índice de masa corporal (IMC) de acuerdo a CDC-NCH en los mayores. Se consideró una talla baja con un valor de T/E < -2 desviaciones estándar según el sexo. Resultados: Se evaluaron 365 niños, 201 hombres (55,1%), con una mediana de edad de 3,35 (RIC: 1,2-8,2) años. El principal motivo de ingreso fue por cardiopatías (30,4%). La estancia hospitalaria tuvo una mediana de 2,0 (RIC: 2,0-4,0) días. Se observó una desnutrición en el 3,3%; riesgo de desnutrición en un 8%; sobrepeso en un 15% y obesidad en un 10,9%. Se encontró una talla baja en un 12,9%. Las enfermedades cardiológicas fueron más frecuentes en los menores de 2 años, y las enfermedades neurológicas y gastrointestinales en niños mayores, mostrando una asociación significativa. Mediante regresión logística ordinal por cada año de edad, el ZP/T aumenta en un 6,9% (OR = 1,07). Los exámenes bioquímicos y el tiempo hospitalizado no se asociaron con el estado nutricional. Conclusiones: Se encontró un porcentaje importante de niños con riesgo de desnutrición. El exceso de peso observado fue similar a la población pediátrica chilena. La detección precoz de malnutrición permitiría una pronta intervención y seguimiento nutricional al alta.

Introduction: Malnutrition in hospitalized children is associated with increased morbidity and mortality. Objective: To determine the nutritional status in children admitted to the Hospital Clínico de la Universidad Católica de Chile. Patients and method: A retrospective, cross-sectional study was conducted on hospital patients less than 17 years old within the period from November 2010 to April 2011. A record was made of the demographic data, admission diagnosis, biochemistry results (albumin, haemoglobin, haematocrit), hospital stay, and anthropometry data. Nutritional diagnosis was expressed as standard deviation (SD) for weight-for-height (WFH) by WHO in children younger than 5 y, and body mass index (BMI) by CDC-NCHS in older children. Height-for-age (HFA) ≤ -2 SD indicated stunted growth. Results: A total of 365 children, including 201 boys (55.1%), were evaluated. The median age was 3.35 years (IQR: 1.2-8.2). The most frequent reason for admission was heart disease (30.4%). The median hospital stay was 2 days (IQR: 2.0-4.0). Undernutrition was observed in 3.3% of the children, 8% were nutritionally at risk, 15% were overweight, and 10.9% were obese. As regards HFA, short stature was reported in 12.9%. There was a significant relationship between lower age and heart disease, and higher age with gastrointestinal and neurological diseases. By ordinal logistic regression for each year of age, the weight/height ratio (ZP/T) increases by 6.9% (OR = 1.07). The biochemistry results (albumin, haemoglobin and haematocrit levels) were not associated with nutritional status. Conclusions: A high percentage of children at risk of undernutrition was found. The percentage overweight was similar to the general Chilean paediatric population. Early detection will allow an opportune intervention, and nutritional monitoring at discharge.

[Nutritional assessment in hospitalized children in a Paediatric service]. / Evaluación nutricional en niños hospitalizados en un Servicio de Pediatría.

INTRODUCTION: Malnutrition in hospitalized children is associated with increased morbidity and mortality. OBJECTIVE: To determine the nutritional status in children admitted to the Hospital Clínico de la Universidad Católica de Chile. PATIENTS AND METHOD: A retrospective, cross-sectional study was conducted on hospital patients less than 17 years old within the period from November 2010 to April 2011. A record was made of the demographic data, admission diagnosis, biochemistry results (albumin, haemoglobin, haematocrit), hospital stay, and anthropometry data. Nutritional diagnosis was expressed as standard deviation (SD) for weight-for-height (WFH) by WHO in children younger than 5 y, and body mass index (BMI) by CDC-NCHS in older children. Height-for-age (HFA) ≤-2SD indicated stunted growth. RESULTS: A total of 365 children, including 201 boys (55.1%), were evaluated. The median age was 3.35 years (IQR: 1.2-8.2). The most frequent reason for admission was heart disease (30.4%). The median hospital stay was 2 days (IQR: 2.0-4.0). Undernutrition was observed in 3.3% of the children, 8% were nutritionally at risk, 15% were overweight, and 10.9% were obese. As regards HFA, short stature was reported in 12.9%. There was a significant relationship between lower age and heart disease, and higher age with gastrointestinal and neurological diseases. By ordinal logistic regression for each year of age, the weight/height ratio (ZP/T) increases by 6.9% (OR=1.07). The biochemistry results (albumin, haemoglobin and haematocrit levels) were not associated with nutritional status. CONCLUSIONS: A high percentage of children at risk of undernutrition was found. The percentage overweight was similar to the general Chilean paediatric population. Early detection will allow an opportune intervention, and nutritional monitoring at discharge.

Bone mineral density in young Chilean patients with type 1 diabetes mellitus.

BACKGROUND: In this study, our aim was to analyze bone mineral density (BMD) in patients with type 1 diabetes mellitus (T1DM) and compare them with a healthy reference population; in addition, we aimed to observe the association between BMD and the following variables: age at onset, disease duration, metabolic control, pubertal stage, level of physical activity, clinical parameters and nutrient intake. METHODS: A total of 30 patients with T1DM were included in the study. BMD was determined using dual-energy X-ray densitometry (DXA). Participants with a z-score of values ≥-1 were accepted as normal; BMDs between -2 and -1 were defined as being in the low range of normality; ≤-2 were defined as having low BMD. The 25-hydroxy vitamin D level was classified as sufficient (30-100 ng/mL), insufficient (20-30 ng/mL), and deficient (<20 ng/mL). RESULTS: The percentages of patients with deficient and insufficient 25(OH) vitamin D levels were 50% and 45.8%, respectively. Lumbar spine (LS2-LS4) BMD, total body (TB) BMD and femoral neck (FN) BMD were found in the normal range for more than 80% of the subjects, with no significant differences due to gender. No strong correlations between clinical variables, biochemical parameters and nutrient intake were observed; however, a moderate positive correlation was found between serum calcium and LS2-LS4 BMD (p<0.05). Regression analysis showed that serum calcium, duration of diabetes and intake of sodium and protein are significant factors in determining LS2-LS4 BMD and TB BMD. CONCLUSIONS: Patients with T1DM had a normal mean BMD at all sites evaluated, except for two patients who had low BMD at the lumbar spine. More than 95% of patients had insufficient or deficient vitamin D levels. With respect to all the variables studied, serum calcium presented the highest significant correlation with LS2-LS4 BMD.

Melanocortin-4 Receptor Gene Variation Is Associated with Eating Behavior in Chilean Adults.

BACKGROUND/AIMS: To evaluate the association between allelic variants of melanocortin receptors -3 and -4 (MC3R and MC4R, respectively) and leptin receptor (LEPR) genes with body mass index (BMI) and eating behavior. METHODS: We selected 344 Chilean adults (57.8% women; age 39.1 ± 6.6 years) with a wide variation in BMI (30.3 ± 6.3 kg/m²). The Three-Factor Eating Questionnaire-R18 that measures uncontrolled eating (UE), emotional eating (EE) and cognitive restraint scores was adapted, validated and assessed for association with BMI. Genotypes were determined by polymerase chain reaction followed by restriction fragment length polymorphism techniques and Taqman assays. RESULTS: Higher EE scores were found in obese vs. non-obese in both men (p = 0.01) and women (p < 0.001). UE scores were significantly associated with BMI only in women (p = 0.002). No significant differences in eating behavior scores or BMI were found by LEPR (rs1137101, rs8179183 and rs1137100 polymorphisms) or MC3R (rs3746619 and rs3827103). Carriers of the C allele for MC4R rs17782313 showed significantly higher scores of UE compared to non-carriers (2.3 ± 0.8 vs. 2.0 ± 0.7; p = 0.02). Additionally, we also report a monogenic case of obesity carrying the pathogenic mutation 449C>T (Thr150Ile) in MC4R gene with no apparent alterations in eating behavior scores. CONCLUSIONS: UE scores were higher in C-allele carriers of MC4R-rs17782313 compared to non-carriers.

Dietary intake, body composition, and physical activity among young patients with type 1 diabetes mellitus.

OBJECTIVE: The aim of this study was to assess dietary intake, nutritional status, body composition, and physical activity level in a group of Chilean children and adolescents with Type 1 diabetes mellitus (T1DM), compare these parameters with the recommendations of the International Society for Pediatric and Adolescent Diabetes (ISPAD), and determine the relationships between dietary intake, body composition, and diabetes control. METHODS: A total of 30 patients with T1DM (aged 15.2±4.0 years) were included. Dietary intake was assessed using a 92-item quantitative food frequency questionnaire. Body composition was determined using dual-energy X-ray densitometry. Physical activity was assessed by means of a survey. RESULTS: The energy intake of these patients was derived from 21.4% protein, 48% carbohydrates, and 31.2% fat. The glycosylated hemoglobin (HbA1c) was significantly correlated with fat as grams per day (r: 0.363, p<0.05) and calories per day (r: 0.364, p<0.05). The mean body fat percentage in females was 31.2% and 20.2% in males (p < 0.01) and the mean amount of physical activity was 4.5±2.7 h per week. CONCLUSIONS: The study patients had a higher protein intake than recommended by ISPAD. Dietary carbohydrate intake was rather low, and dietary fat intake was the same as the limits recommended by ISPAD. Diabetic control was significantly correlated with protein, carbohydrates, fat, and sodium intake. The girls in the study had a higher percentage of body fat than the standard recommendations for their age. The level of physical activity was adequate.

[Novel physiological and therapeutic implications of leptin]. / Nuevas proyecciones fisiológicas, patológicas y terapéuticas de la leptina.

The adipose tissue is an endocrine organ that produces a variety of protein hormones. One of them is leptin, which regulates several critical functions at the central nervous system such as caloric intake, basal energy expenditure, reproduction, glucose and lipid metabolism and osteogenesis. Acting at a local level, leptin modulates the immune system and promotes liver fibrogenesis. The most promising therapeutic implications of leptin will possibly be in type 1 diabetes mellitus (DM1). Its supplementation in animal models of DM1 prevents hyperglycemia and ketoacidosis. These actions depend on the activation of leptin receptors in the central nervous system and the suppression of glucagon signaling in the liver.

[Association between genetic polymorphisms of interleukin 6 (IL6), IL6R and IL18 with metabolic syndrome in obese Chilean children]. / Polimorfismos genéticos de interleuquina 6 (IL6), IL6R e IL18: asociación con componentes del síndrome metabólico en niños chilenos con obesidad.

BACKGROUND: Metabolic Syndrome (MS) is highly prevalent among obese children and adolescents and is considered a predictor for the development of type 2 diabetes mellitus and cardiovascular disease. Obesity is associated with an increase in circulating levels of interleukins 6 (IL6) and 18 (IL18), which in turn would depend on polymorphisms of IL6, IL6R and IL18 genes. AIM: To evaluate the association between genetic polymorphisms of IL6 (rs1800795, rs1800796 and rs1800797), IL6R (rs2228145) and IL18 (rs360719, rs187238 and rs204355) and MS and/or its components in a sample of Chilean obese children. PATIENTS AND METHODS: These polymorphisms were genotyped in 259 obese children aged 10 ± 2 years with a body mass index of 26.1 ± 4.1 kg/m². Sixty eight had metabolic syndrome (26.3%). The association of their alleles, genotypes and haplotypes with the MS and its components was assessed. RESULTS: IL6, IL6R and IL18 variants showed no association with SM nor with any of the phenotypes that compose it. However, IL18 haplotypes (rs360719-rs187238-rs204355) TCT and CGT were associated with triglycerides ≤ 110 mg/dL and HDL < 40 mg/dL, respectively. CONCLUSIONS: IL6 and IL6R variants are not associated with MS or with any of its phenotypes. Although an association between IL18 haplotypes and certain MS component has been detected herein, it is necessary to replicate our findings in independent studies due to the low frequency of these allele combinations detected in our sample.

Nuevas proyecciones fisiológicas, patológicas y terapéuticas de la leptina / Novel physiological and therapeutic implications of leptin

The adipose tissue is an endocrine organ that produces a variety of protein hormones. One of them is leptin, which regulates several critical functions at the central nervous system such as caloric intake, basal energy expenditure, reproduction, glucose and lipid metabolism and osteogenesis. Acting at a local level, leptin modulates the immune system and promotes liver fibrogenesis. The most promising therapeutic implications of leptin will possibly be in type 1 diabetes mellitus (DM1). Its supplementation in animal models of DM1 prevents hyperglycemia and ketoacidosis. These actions depend on the activation of leptin receptors in the central nervous system and the suppression of glucagon signaling in the liver.

Polimorfismos genéticos de interleuquina 6 (IL6), IL6R e IL18: asociación con componentes del síndrome metabólico en niños chilenos con obesidad / Association between genetic polymorphisms of interleukin 6 (IL6), IL6R and IL18 with metabolic syndrome in obese Chilean children

Background: Metabolic Syndrome (MS) is highly prevalent among obese children and adolescents and is considered a predictor for the development of type 2 diabetes mellitus and cardiovascular disease. Obesity is associated with an increase in circulating levels of interleukins 6 (IL6) and 18 (IL18), which in turn would depend on polymorphisms of IL6, IL6R and IL18 genes. Aim: To evaluate the association between genetic polymorphisms of IL6 (rs1800795, rs1800796 and rs1800797), IL6R (rs2228145) and IL18 (rs360719, rs187238 and rs204355) and MS and/or its components in a sample of Chilean obese children. Patients and Methods: These polymorphisms were genotyped in 259 obese children aged 10 ± 2 years with a body mass index of 26.1 ± 4.1 kg/m². Sixty eight had metabolic syndrome (26.3%). The association of their alleles, genotypes and haplotypes with the MS and its components was assessed. Results: IL6, IL6R and IL18 variants showed no association with SM nor with any of the phenotypes that compose it. However, IL18 haplotypes (rs360719-rs187238-rs204355) TCT and CGT were associated with triglycerides ≤ 110 mg/dL and HDL < 40 mg/dL, respectively. Conclusions: IL6 and IL6R variants are not associated with MS or with any of its phenotypes. Although an association between IL18 haplotypes and certain MS component has been detected herein, it is necessary to replicate our findings in independent studies due to the low frequency of these allele combinations detected in our sample.

Prevalence of metabolic syndrome in obese Chilean children and association with gene variants of the leptin-melanocortin system.

Metabolic syndrome (MS) related to adult type 2 diabetes mellitus and cardiovascular disease is prevalent among obese children/adolescents. Genetic variants of the leptin-melanocortin system have been associated with components of MS. The aim of our study is to estimate the prevalence of MS (according to Cook's criteria) in a Chilean cross-sectional sample of 259 obese children (47.1% girls, aged 6-12 years), and to assess the association between common genetic variants of leptin-melanocortin pathway genes (LEP, LEPR, POMC, MC3R and MC4R) with components of the MS using logistic regression. We observed an overall MS prevalence of 26.3% (32.2% in girls and 21.1% in boys) in obese Chilean children. No associations were detected between genetic variants of leptin-melanocortin genes and MS components. MS prevalence among our obese children sample is similar to those previously described in Chile, demonstrating the increased risk of diseases in adulthood that obese children carry.

Gestational diabetes and pre-pregnancy overweight: possible factors involved in newborn macrosomia.

AIM: Good glycemic control in gestational diabetes mellitus (GDM) seems not to be enough to prevent macrosomia (large-for-gestational-age newborns). In GDM pregnancies we studied the effects of glycemic control (as glycosylated hemoglobin [HbA1c]), pre-pregnancy body mass index (PP-BMI) and gestational weight gain per week (GWG-W) on the frequency of macrosomia. METHODS: We studied 251 GDM pregnancies, divided into two groups: PP-BMI<25.0kg/m(2) (the non-overweight group; n=125), and PP-BMI≥25.0kg/m(2) (the overweight group; n=126). A newborn weight Z-score>1.28 was considered large-for-gestational-age. Statistical analysis was carried out using the Student's t-test and χ(2) -test, receiver-operator characteristic curves and linear and binary logistic regressions. RESULTS: Prevalence of macrosomia was 14.9% among GDM (n=202/251, 88.4%) with good glycemic control (mean HbA1c<6.0%), and 28.1% in those with mean HbA1c≥6.0% (n=49/251, P<0.025). Macrosomia rates were 10.4% in the non-overweight group and 24.6% in the overweight group (P=0.00308), notwithstanding both having similar mean HbA1c (5.48±0.065 and 5.65±0.079%, P=0.269), and similar GWG-W (0.292±0.017 and 0.240±0.021kg/week, P=0.077). Binary logistic regressions showed that PP-BMI (P=0.012) and mean HbA1c (P=0.048), but not GWG-W (P=0.477), explained macrosomia. CONCLUSIONS: Good glycemic control in GDM patients was not enough to reduce macrosomia to acceptable limits (<10% of newborns). PP-BMI and mean HbA1c (but not GWG-W) were significant predictors of macrosomia. Thus, without ceasing in our efforts to improve glycemic control during GDM pregnancies, patients with overweight/obesity need to be treated prior to becoming pregnant.

Evaluación primaria en la unidad de emergencia / Primary assessment in the emergency departments

Los Servicios de Urgencia corresponden a centros de atención de alta complejidad médica que no presentan restricciones de entrada a los usuarios. Se atiende a pacientes con motivos de consulta indiferenciados, cursando desde etapas iniciales de la enfermedad hasta presentaciones avanzadas con riesgo vital. El enfrentamiento inicial del paciente con patología indiferenciada aguda en la unidad de emergencia se denomina evaluación primaria. La evolución y el pronóstico de los enfermos se verán influenciados por la detección y manejo oportuno de aquellas condiciones que amenazan su vida o funcionalidad. La evaluación primaria es una aproximación estructurada e indiferenciada al paciente con patología aguda potencialmente grave que permite la pesquisa oportuna y el tratamiento de aquellas condiciones que ponen en riesgo la vida o funcionalidad de los enfermos. En ella se propone un orden sistemático y reproducible para realizar la primera aproximación diagnóstica al paciente con patología aguda indiferenciada, reduciendo la posibilidad de omitir elementos que lleven a error o retraso diagnóstico en situaciones de riesgo vital. Se considera la exploración física detallada de la vía aérea (A), la respiración (B), la circulación (C), alteraciones neurológicas (D) y el examen físico sistemático (Exposición). En este artículo se exponen los objetivos, las características y la implementación de esta estrategia de enfrentamiento de los enfermos en la unidad de emergencia.

The emergency departments are highly complex medical systems offered without restrictions to users. It serves patients with undifferentiated reasons for consultation, ranging from early stages of the disease to life-threatening advanced presentations. The acute undifferentiated patient’s initial evaluation in the emergency unit is called primary assessment. The evolution and prognosis of emergency patients will be influenced by the detection and timely management of these life-threatening conditions. The primary assessment is a structured approach to the patient with undifferentiated acute potentially serious pathology that allows timely screening and treatment of conditions that endanger life or functionality of the sick. It proposes a systematic and reproducible initial diagnostic approach to patients with undifferentiated acute disease, reducing the possibility of missing elements that lead to diagnostic error or delay in life-threatening situations. It involves the detailed physical examination/assessment of airway (A), breathing (B), circulation (C), neurologic abnormalities (D) and head to toe examination (Exposure).This article outlines the objectives, features and implementation of this strategy of initial assessment of patients in the emergency unit.

Series clínicas de medcina de urgencia: evaluación del paciente adulto con diarrea aguda en la unidad de emergencia / Evaluation and management of acute diarrhea in the emergency department

El síndrome diarreico agudo (SDA) es un motivo de consulta frecuente en la unidad de emergencia, correspondiendo entre 5-10 por ciento de todas las consultas. El cuadro clínico suele ser autolimitado y benigno en la mayoría de los casos, pero puede ser causa importante de morbimortalidad. El SDA es una causa frecuente de ausencia laboral y escolar. La historia clínica y el examen físico sistematizados permiten identificar la mayoría de las causas de SDA, valorar la gravedad del paciente, necesidad de hospitalización y decidir el tratamiento. En casos determinados se recomienda solicitar exámenes de laboratorio que orientan sobre la etiología como los leucocitos fecales, lactoferrina fecal, coprocultivo, toxina de Clostridium difficile y examen parasitológico seriado de deposiciones. El manejo básico en el servicio de urgencia consiste en rehidratación y analgesia. Las indicaciones de egreso incluyen hidratación oral, dieta, analgésicos, antidiarreicos, probióticos y antibióticos según el caso particular. Basados en un caso clínico discutiremos la evaluación y manejo del paciente adulto con diarrea aguda en la unidad de emergencia.

The acute diarrhea (AD) is a frequent complaint in emergency department, identifying about 5 to 10 percent of all queries. It is self limiting and benign in most cases but may be an important cause of morbidity and mortality. Determines a significant number of work and school absences. The history and physical examination achieve to identify most causes of AD, patient severity, need for hospitalization and treatment. In certain cases can be used etiological laboratory tests like fecal leukocytes, fecal lactoferrin, stool culture, Clostridium difficile toxin and parasitologic serial stool examination. Emergency management consists in rehydration and analgesia. The discharge instructions include oral hydration, diet, analgesics, antidiarrhoeal therapy, probiotics and antibiotics according to each case. Based on a clinical case we will discuss the evaluation and management of acute diarrhea in the emergency department.

Evaluación del paciente adulto con fiebre sin foco clínico evidente en la unidad de emergencia / Evaluation adult patient with fever without source in the emergency department

La fiebre es un motivo de consulta frecuente en los servicios de urgencia (SU), concentrando el 4,4 por ciento a 7,5 por ciento de las consultas. La evaluación del paciente adulto con fiebre en el servicio de urgencias siempre es un desafío. Aunque la condición subyacente que ocasiona los síntomas puede variar considerablemente, se requiere una aproximación diagnóstica sistematizada, identificando las categorías de riesgo y diferenciando las causas infecciosas que requieren tratamiento antimicrobiano. A pesar de ser un motivo de consulta frecuente no existe un manejo médico estandarizado. El amplio espectro de presentaciones puede ir desde pacientes graves y comprometidos, a pacientes de buen aspecto general febriles, siendo estos últimos donde la estratificación de riesgo es fundamental, reconociendo las poblaciones de riesgo elevado (inmunocomprometidos, embarazadas y el adulto mayor) que pueden tener infecciones graves y complicaciones asociadas serias. En el adulto joven febril sin foco evidente y sin factores de riesgo, se mantiene la discusión si existe algún marcador que por sí solo permita estratificar el riesgo en este grupo. En este contexto, ni el hemograma ni los biomarcadores de inflamación sistémica como la proteína C reactiva y la procalcitonina sérica han demostrado claros beneficios a favor de su uso. La implementación de un protocolo estandarizado basado en la evidencia en la evaluación y tratamiento del paciente adulto febril sin foco clínico evidente nos permitiría optimizar el uso de los recursos de salud y racionalizar el uso de antimicrobianos.

Febrile illness is one of the most frequent causes of attendance at emergency departments (EDs) worldwide, accounting for 4.4 to 7.5 percent of all ED consultation. The evaluation of adult patients with fever in the emergency department is always a challenge. Although the underlying conditions causing the symptom of fever vary considerably, it requires a systematic approach regardless of the underlying condition, concentrating upon a primary division between bacterial infections and other conditions and subsequent risk stratification, often using the same parameters. Despite being a frequent complaint there is no a standard medical management. The broad spectrum of presentations can range from serious and committed patients to patients in good general appearance with fever, the latter being where risk stratification is essential, recognizing high-risk populations (immunocompromised, pregnant women and the elderly) who may have infections and more serious complications. In the young adult patient, fever without apparent focus, with no risk factors, there is still debate as to whether there is a marker that allows itself to stratify risk in this group. In this context, the blood cell count and biomarkers of systemic inflammation such as C-reactive protein and procalcitonin have not shown clear results in favor of its use. The implementation of a standardized protocol based on the evidence in the assessment and treatment of febrile adult patients without clinically apparent focus allow us to optimize the use of health resources and rational antimicrobials use.

Obesidad y riesgo obstétrico en una población chilena / Obesity and obstetric risk in chilean women

Se comparó las características evolutivas del embarazo, parto y recién nacido entre un grupo de 163 embarazadas obesas (índice peso para la talla mayor de 120%) y 163 controles (índice peso para la talla entre 94 y 106%) pareadas por edad y paridad. Las embarazadas obesas presentaron una significativa mayor frecuencia de hipertensión arterial (p<0,005), de preeclamsia (p<0,05), de cesáreas (p<0,027) y de infección puerperal (p<0,01) que el grupo control. No se encontró diferencia en la incidencia de diabetes gestacional y hemorragias postparto. El peso de nacimiento fue significativamente superior en los hijos de madres obesas (p<0,004), al igual que la incidencia de niños grandes para la edad gestacional (p<0,037). No se observaron diferencias en la morbilidad neonatal ni en las características de la lactancia al mes de edad entre ambos grupos. Se concluye que la obesidad durante el embarazo, aún de intensidad moderada, constituye un importante riesgo obstétrico