Índice de masa triponderal y marcadores de riesgo metabólico en niños y adolescentes con obesidad / Triponderal mass index and markers of metabolic risk in children and adolescents with obesity

Antecedentes y objetivo El índice de masa triponderal (IMT) estimaría mejor que el índice de masa corporal (IMC) el exceso de adiposidad, manteniendo valores estables durante la infancia. Este trabajo pretende determinar la correlación del IMT con marcadores de riesgo metabólico y establecer valores del IMT que se relacionen con un aumento del riesgo metabólico. Material y métodos Estudio multicéntrico, observacional, transversal y prospectivo en menores de 14 años con obesidad. Variables: edad, sexo, estadio puberal, peso, talla, perímetro abdominal, IMC, IMT, glucosa e insulina basales, índice HOMA, presión arterial, perfil lipoproteico, transaminasas y ácido úrico. El IMC y el IMT se expresaron según los valores del estudio longitudinal de Barcelona. Se realizó análisis estadístico con el programa SPSS*. Resultados Se incluyeron 199 pacientes (50,3% varones), con una edad media de 11,08 (2,48) años e IMT de 19,68 (2,36) kg/m3. Se observó correlación del IMT con el perímetro abdominal (r = 0,571; p = 0), la insulina (r = 0,198; p = 0,005), el índice HOMA (r = 0,189; p = 0,008) y el c-HDL (r = −0,188; p = 0,008). El IMT > 20,15 kg/m3 se asoció a insulina ≥ 15 mUI/ml (p = 0,029) y el IMT > 20,36 kg/m3 a c-HDL < 40 mg/dl (p = 0,023). Conclusiones El IMT se correlacionó con el incremento del perímetro abdominal, la insulina y el índice HOMA, y la disminución del c-HDL. El IMT > 20 kg/m3 puede asociarse a elevación de la insulina y a descenso del c-HDL. Por ello, el IMT parece ser un parámetro útil en la valoración de los pacientes pediátricos con obesidad (AU)Background and objective

Triponderal mass index (TMI) would estimate excess adiposity better than body mass index (BMI), maintaining stable values during childhood. This work aims to determine the correlation between TMI and markers of metabolic risk as well as set values of TMI that are related to an increase of metabolic risk. Material and methods Multicenter, observational, cross-sectional and prospective study in children under 14 years of age with obesity. Variables: age, sex, pubertal stage, weight, height, abdominal circumference, BMI, TMI, basal glucose and insulin, HOMA index, blood pressure, lipoprotein profile, transaminases and uric acid. BMI and TMI were expressed according to the values of the Barcelona longitudinal study. Statistical analysis was performed with the SPSS* program. Results One hundred and ninety-nine patients (50.3% male), age 11.08 (2.48) years, TMI 19.68 (2.36) kg/m3. Correlation between TMI and abdominal circumference (r = 0.571; p = 0), insulin (r = 0.198; p = 0.005), HOMA index (r = 0.189; p = 0.008) and HDL-c (r = −0.188; p = 0.008) was observed. IMT > 20.15 kg/m3 was associated with insulin ≥ 15 mIU/ml (p = 0.029) and IMT > 20.36 kg/m3 with HDL-c < 40 mg/dl (p = 0.023). Conclusions TMI was correlated with increase of abdominal circumference, insulin and HOMA index and decrease of HDL-c. IMT > 20 kg/m3 can be associated with increased insulin and decreased HDL-c. Therefore, the IMT seems to be a useful parameter in the assessment of pediatric patients with obesity (AU)

[Triponderal mass index and markers of metabolic risk in children and adolescents with obesity]. / Índice de masa triponderal y marcadores de riesgo metabólico en niños y adolescentes con obesidad.

BACKGROUND AND OBJECTIVE: Triponderal mass index (TMI) would estimate excess adiposity better than body mass index (BMI), maintaining stable values during childhood. This work aims to determine the correlation between TMI and markers of metabolic risk as well as set values of TMI that are related to an increase of metabolic risk. MATERIAL AND METHODS: Multicenter, observational, cross-sectional and prospective study in children under 14 years of age with obesity. VARIABLES: age, sex, pubertal stage, weight, height, abdominal circumference, BMI, TMI, basal glucose and insulin, HOMA index, blood pressure, lipoprotein profile, transaminases and uric acid. BMI and TMI were expressed according to the values of the Barcelona longitudinal study. Statistical analysis was performed with the SPSS* program. RESULTS: One hundred and ninety-nine patients (50.3% male), age 11.08 (2.48) years, TMI 19.68 (2.36)kg/m3. Correlation between TMI and abdominal circumference (r=0.571; p=0), insulin (r=0.198; p=0.005), HOMA index (r=0.189; p=0.008) and HDL-c (r=-0.188; p=0.008) was observed. IMT>20.15kg/m3 was associated with insulin≥15mIU/ml (p=0.029) and IMT>20.36kg/m3 with HDL-c<40mg/dl (p=0.023). CONCLUSIONS: TMI was correlated with increase of abdominal circumference, insulin and HOMA index and decrease of HDL-c. IMT>20kg/m3 can be associated with increased insulin and decreased HDL-c. Therefore, the IMT seems to be a useful parameter in the assessment of pediatric patients with obesity.

Novel mutations associated with nephrogenic diabetes insipidus. A clinical-genetic study.

UNLABELLED: Molecular diagnosis is a useful diagnostic tool in primary nephrogenic diabetes insipidus (NDI), an inherited disease characterized by renal inability to concentrate urine. The AVPR2 and AQP2 genes were screened for mutations in a cohort of 25 patients with clinical diagnosis of NDI. Patients presented with dehydration, polyuria-polydipsia, failure to thrive (mean ± SD; Z-height -1.9 ± 2.1 and Z-weight -2.4 ± 1.7), severe hypernatremia (mean ± SD; Na 150 ± 10 mEq/L), increased plasma osmolality (mean ± SD; 311 ± 18 mOsm/Kg), but normal glomerular filtration rate. Genetic diagnosis revealed that 24 male patients were hemizygous for 17 different putative disease-causing mutations in the AVPR2 gene (each one in a different family). Of those, nine had not been previously reported, and eight were recurrent. Moreover, we found those same AVPR2 changes in 12 relatives who were heterozygous carriers. Further, in one female patient, AVPR2 gene study turned out to be negative and she was found to be homozygous for the novel AQP2 p.Ala86Val alteration. CONCLUSION: Genetic analysis presumably confirmed the diagnosis of nephrogenic diabetes insipidus in every patient of the studied cohort. We emphasize that we detected a high presence (50 %) of heterozygous females with clinical NDI symptoms. WHAT IS KNOWN: • In most cases (90 %), inherited nephrogenic diabetes insipidus (NDI) is an X-linked disease, caused by mutations in the AVPR2 gene. • In rare occasions (10 %), it is caused by mutations in the AQP2 gene. What is new: • In this study, we report 10 novel mutations associated with NDI. • We have detected a high presence (50 %) of heterozygous carriers with clinical NDI symptoms.

Tasa estimada de disposición de glucosa en pacientes menores de 18 años con diabetes mellitus tipo 1 y sobrepeso-obesidad / Estimated glucose disposal rate in patients under 18 years of age with type 1 diabetes mellitus and overweight or obesity

Objetivo Comparar la tasa estimada de disposición de glucosa (TeDG), la dosis de insulina y el perfil lipoproteico en niños con diabetes mellitus tipo 1 (DM1) y sobrepeso-obesidad frente a niños con DM1 de peso normal. Métodos Se seleccionaron 115 pacientes (5-16 años) con DM1 e insulinoterapia intensiva. Se determinaron: peso, talla, índice de masa corporal, perímetro abdominal y de cadera, dosis de insulina, hemoglobina glucosilada, presión arterial y perfil lipoproteico. Los resultados se estratificaron por sexo y edad. Resultados No se encontraron diferencias en la TeDG entre los pacientes con peso normal, sobrepeso y obesidad. No obstante, los niños obesos mayores de 11 años mostraron valores inferiores en la TeDG (9,3 ± 1,3 vs 10,1 ± 0,8 mg kg-1min; p < 0,01). Los niños con obesidad y sobrepeso precisaban dosis de insulina superiores a aquellos con peso normal, especialmente en UI/m2/día (37,7 vs 36,1 vs 29,4, respectivamente; p < 0,007). Los niños con obesidad presentaban concentraciones de colesterol de las lipoproteínas de baja densidad superiores a aquellos con sobrepeso y peso normal (106,5 vs 91,7 vs 91,5 mg/dl, respectivamente; p < 0,01). Asimismo, no se encontró correlación entre el perímetro abdominal y los distintos marcadores de resistencia a la insulina. Conclusiones La TeDG es inferior en niños obesos mayores de 11 años con DM1, por lo que podría considerarse como un marcador de resistencia a la insulina. Las necesidades de insulina son mayores en pacientes con sobrepeso-obesidad, especialmente cuando se cuantifican en UI/m2/día. Los pacientes obesos con DM1 presentan un perfil lipoproteico de riesgo cardiovascular (AU)

Objective To assess the estimated glucose disposal rate (eGDR), insulin dose, and lipoprotein profile in children with type 1 diabetes mellitus (T1DM) and overweight or obesity as compared to children with T1DM and normal weight. Methods A total of 115 patients (aged 5-16 years) with T1DM on intensive insulin therapy were recruited. The following parameters were measured: weight, height, body mass index, waist and hip circumference, insulin dose, eGDR, glycosylated hemoglobin, blood pressure, and lipoprotein profile. Results were stratified by sex and age. Results No significant differences were found in eGDR between children with normal weight, overweight, and obesity. However, obese children older than 11 years had lower eGDR values (9.3 ± 1.3 vs 10.1 ± 0.8 mg kg-1min-1; p < 0.01). Insulin dose was higher in overweight and obese children, especially in IU/m2/day (37.7 vs 36.1 vs 29.4 respectively; p < 0.01). Obese children had higher low-density lipoprotein cholesterol levels than children with overweight and normal weight (106.5 vs 91.7 vs 91.5 mg/dL respectively; p < 0.01). No correlation was found between waist circumference and the different markers of insulin resistance. Conclusions Values of eGDR values were lower in obese children with T1DM older than 11 years, and this may therefore be considered a marker of insulin resistance. Insulin dose was higher in diabetic patients with overweight or obesity, specially in IU/m2/day. Obese children with T1DM had a lipoprotein profile of cardiovascular risk. (AU)

[Estimated glucose disposal rate in patients under 18 years of age with type 1 diabetes mellitus and overweight or obesity]. / Tasa estimada de disposición de glucosa en pacientes menores de 18 años con diabetes mellitus tipo 1 y sobrepeso-obesidad.

OBJECTIVE: To assess the estimated glucose disposal rate (eGDR), insulin dose, and lipoprotein profile in children with type 1 diabetes mellitus (T1DM) and overweight or obesity as compared to children with T1DM and normal weight. METHODS: A total of 115 patients (aged 5-16 years) with T1DM on intensive insulin therapy were recruited. The following parameters were measured: weight, height, body mass index, waist and hip circumference, insulin dose, eGDR, glycosylated hemoglobin, blood pressure, and lipoprotein profile. Results were stratified by sex and age. RESULTS: No significant differences were found in eGDR between children with normal weight, overweight, and obesity. However, obese children older than 11 years had lower eGDR values (9.3±1.3 vs 10.1±0.8 mg kg(-1)min(-1); p<0.01). Insulin dose was higher in overweight and obese children, especially in IU/m2/day (37.7 vs 36.1 vs. 29.4 respectively; p<0.01). Obese children had higher low-density lipoprotein cholesterol levels than children with overweight and normal weight (106.5 vs 91.7 vs 91.5mg/dL respectively; p<0.01). No correlation was found between waist circumference and the different markers of insulin resistance. CONCLUSIONS: Values of eGDR values were lower in obese children with T1DM older than 11 years, and this may therefore be considered a marker of insulin resistance. Insulin dose was higher in diabetic patients with overweight or obesity, specially in IU/m2/day. Obese children with T1DM had a lipoprotein profile of cardiovascular risk.

Trombosis venosa profunda secundaria a canalización de vena femoral en niños con cetoacidosis diabética / Deep venous thrombosis secondary to femoral vein catheterization in children with diabetic ketoacidosis

Los niños ingresados por cetoacidosis diabética (CAD) suelen manejarse con vías periféricas; sin embargo, algunos pacientes necesitan un catéter central para el manejo inicial. Es sabido que la CAD implica un estado de hipercoagulabilidad que supone un aumento del riesgo de trombosis asociada a catéter. Se presentan 2 casos de trombosis femoral asociada a canalización de vena femoral coincidiendo con cetoacidosis diabética en lactantes de 18 y 27 meses. En ambos la trombosis fue precoz (antes de 72 h tras la inserción) y se desarrolló a pesar de la rápida retirada de la vía central (menor de 48 h). Debido al alto riesgo de trombosis asociada a catéter en los pacientes diabéticos más pequeños (menores de 3 años), debe considerarse individualmente la necesidad de catéter central y evitarlo siempre que sea posible. En caso de canalización, debe valorarse la profilaxis con heparina de bajo peso molecular (AU)

Children admitted to hospital for diabetic ketoacidosis are frequently managed with peripheral venous lines. However, due to the severity of their illness, some patients need central lines for initial treatment. Diabetic ketoacidosis is known to produce hypercoagulability, increasing the risk of catheter-related deep venous thrombosis. We present two patients with diabetic ketoacidosis, aged 18 and 27 months, who developed deep venous thrombosis after placement of femoral central venous catheters. In both patients, the thrombosis occurred within 72 hours of catheter insertion, despite rapid removal of the central lines (less than 48 hours). Due to the high risk of catheter-related thrombosis in patients with diabetic ketoacidosis (especially in children aged less than 3 years old), the need for central venous lines should be evaluated in each patient and avoided as far as possible. Low molecular weight heparin prophylaxis should be considered if a venous central catheter is required (AU)