The bone densitometry is normal in Turner syndrome prepubertal patients after height age correction / A densitometria óssea é normal em pacientes pré-púberes com síndrome de turner quando corrigida pela idade estatura

Abstract Objectives: to evaluate the bone mass in prepubertal patients with Turner Syndrome (TS) according to height age (HA) and verify the influence of karyotype and adiposity. Methods: retrospective and analytical study of prepubertal TS patients. The variables analyzed were: karyotype, age at bone densitometry (BD), height, body mass index (BMI) and BD result. The result of the BD was corrected using HA. BMI and BD were calculated on Z score for chronological age (CA) and for HA. Results: thirty-seven prepubertal patients were selected and after exclusion criteria, 13 cases between 10 and 13 years old were included in the study. The BD for HA was significantly higher than for CA (0.39 ± 1.18 x −1.62 ± 1.32), without karyotype (p=0.369) and BMI (p=0.697) influence. Conclusion: prepubertal TS patients present normal BD when corrected for HA, without influence of karyotype and BMI.

Resumo Objetivos: avaliar a massa óssea de pacientes pré-púberes com Síndrome de Turner (ST) de acordo com a idade estatura (IE) e verificar a influência do cariótipo e da adiposidade. Métodos: estudo retrospectivo e analítico de pacientes pré-púberes com ST. As variáveis analisadas foram: cariótipo, idade na realização da densitometria óssea (DO); estatura, índice de massa corporal (IMC) e resultado da DO. Realizou-se a correção do resultado da DO utilizando a IE. O IMC e a DO foram calculados em Z score para idade cronológica (IC) e para IE. Resultados: foram selecionadas 37 pacientes pré-púberes e após critério de exclusão foram incluídas no estudo 13 casos entre 10 e 13 anos de idade. A DO para IE foi significativamente maior que para IC (0,39 ± 1,18 × −1,62 ± 1,32), sem influência do cariótipo (p=0,369) e do IMC (p=0,697). Conclusão: pacientes pré-púberes com ST apresentam DO normal quando corrigida para IE, sem influência do cariótipo e do IMC.

Factores biológicos relacionados con la masa ósea en hombres de edad mediana / Biological Factors Associated to Bone Mass in Middle-Aged Men

RESUMEN Introducción: La osteoporosis masculina es una enfermedad clínica heterogénea y subdiagnosticada, con múltiples factores de riesgo. Requiere un proceso de diagnóstico en ocasiones más complejo que en las mujeres. Objetivo: Identificar factores biológicos relacionados con la masa ósea en hombres de edad mediana. Métodos: Se realizó estudio descriptivo, transversal, en 43 hombres de edad mediana (40-59 años) entre abril de 2017 y mayo de 2018, que fueron atendidos en el Policlínico Universitario Vedado. Se estudiaron los antecedentes patológicos familiares (APF) de osteoporosis masculina o fracturas por fragilidad, índice de masa corporal (IMC), circunferencia de la cintura (CC), presión arterial (PA), glucemia, colesterol, triglicéridos, creatinina, hormona luteinizante, folículo estimulante, estradiol, testosterona (T), prolactina y paratohormona (PTH) y densitometría dual de Rx (DXA). Según edad y resultado de la DXA, se crearon 4 grupos (de 40-49 y de 50-59 años, en L1-L4 y fémur). Se identificaron hombres con hueso normal y mala masa ósea (MMO). Se determinaron distribuciones de frecuencia (variables cualitativas), y mediana y rango (cuantitativas). Se empleó chi cuadrado para determinar relación entre variables cualitativas y Mann-Whitney para cuantitativas. Para establecer correlación entre variables cuantitativas, se calculó el test de Pearson. Resultados: En hombres de 50-59 años, con antecedentes patológicos familiares de fracturas por fragilidad, predominó la mala masa ósea (75 por ciento). La mediana del índice de masa corporal en hombres de 40-49 años fue mayor (26,7 Kg/m2sc) en los que tenían hueso normal en L1-L4; en los de 50-59 años con aumento de la circunferencia de la cintura predominó la mala masa ósea (3; 75 por ciento). La presión arterial sistólica y diastólica se correlacionaron positivamente con la densidad mineral ósea en L1-L4 ([r = 0,225; p = 0,009], [r = 0,263; p = 0,002]). Hubo correlación positiva entre colesterol y contenido mineral óseo en fémur (r = 0,164; p = 0,002). La testosterona resultó más baja en hombres con hueso normal (40-49 años: 15,3 nmol/L; 50-59 años: 12,5 nmol/L). Se observó correlación negativa entre paratohormona y contenido mineral óseo en fémur (r = -0,324; p = 0,000). Conclusiones: Se puede concluir que, de los factores biológicos estudiados en los hombres de edad mediana del Policlínico Universitario Vedado, los niveles más elevados de presión arterial y colesterol, y más bajos de paratohormona, se asociaron con mejor masa ósea(AU)

ABSTRACT Introduction: Male osteoporosis is a heterogeneous and underdiagnosed clinical condition and with multiple risk factors, which requires a diagnostic process that is sometimes more complex than for women. Objective: To identify biological factors related to bone mass in middle-aged men from "Vedado" University Polyclinic. Methods: A cross-sectional and descriptive study was carried out with 43 middle-aged (40-59 years old) men, between April 2017 and May 2018. The variables were family pathological history of osteoporosis or fragility fractures, body mass index, waist circumference, blood pressure, glycemia, cholesterol, triglycerides, creatinine, luteinizing hormone, stimulating follicle, estradiol, testosterone, prolactin and parathyroid hormone, and dual x-ray densitometry. According to age and results of the dual x-ray densitometry, four groups were created (40-49 and 50-59 years old, in L1-L4 and femur). The men with normal bone and poor bone mass were identified. Frequency distributions (qualitative variables), as well as median and range (quantitative variables) were determined. The chi-square test was used to determine the relationship between qualitative variables, and the Mann-Whitney test was used for quantitative variables. To establish correlation between quantitative variables, the Pearson test was used. Results: Among men aged 50-59 years and with a family pathological history of fragility fractures, poor bone mass prevailed (75 percent). The median body mass index among men aged 40-49 years was higher (26.7 kg/m2sc) in those with normal bone in L1-L4; among those aged 50-59 years and with increased waist circumference, poor bone mass predominated (3; 75 percent). Systolic and diastolic blood pressure were correlated positively with bone mineral density in L1-L4 [(r = 0.225, p = 0.009), (r = 0.263, p = 0.002)]. There was a positive correlation between cholesterol and bone mineral content in the femur (r = 0.164, p = 0.002). T was lower among men with normal bone (15.3 nmol/L for the group 40-49 years old, and 12.5 nmol/L for the group 50-59 years old). A negative correlation was observed between the parathyroid hormone and bone mineral content values in the femur (r = -0.324, p = 0.000). Conclusions: Among the biological factors studied in middle-aged men from "Vedado" University Polyclinic, higher levels of blood pressure and cholesterol, as well as lower levels of the parathyroid hormone were concluded to be associated with better bone mass(AU)

Riesgo de fracturas osteoporóticas en adultos mayores / Risk for Osteoporotic Fractures in Aged Adults

Introducción: La medición del Fracture Risk Assessment Tool - FRAX® es útil en Atención Primaria de Salud para evaluar el riesgo de fractura. Objetivo: Determinar el riesgo de fractura osteoporótica en adultos mayores. Métodos: Se realizó un estudio descriptivo de corte transversal, con una muestra de 54 adultos pertenecientes al grupo Club Nueva Vida de la Ciudad de Tunja, primer semestre de 2018, seleccionados por medio de un muestreo no probabilístico a conveniencia. Se empleó la herramienta FRAX®, propuesta por la Organización Mundial de la Salud y se realizó un análisis estadístico con el Chi2 de Pearson y la Razón de Prevalencia. Resultados: El factor de riesgo con mayor presencia fue la osteoporosis secundaria en 51,9 por ciento, donde 13 por ciento reporta FRAX®+ para probabilidad a 10 años de fractura mayor osteoporótica y 14,8 por ciento obtuvo FRAX®+ para probabilidad a 10 años de fractura de cadera sin densitometría ósea. Conclusiones: El FRAX®, es una herramienta útil en la prevención de problemas de salud resultado de fracturas que conllevan a alteraciones en la capacidad funcional y el movimiento(AU)

Introduction: The measurement of the Fracture Risk Assessment Tool - FRAX® is useful in primary healthcare for assessing the risk of fracture. Objective: To determine the risk of osteoporotic fracture in older adults. Methods: A descriptive and cross-sectional study was carried out, with a sample of 54 adults belonging to the Club Nueva Vida group of the City of Tunja, first semester of 2018, selected by means of a nonprobabilistic sampling at convenience. The FRAX® tool, proposed by the World Health Organization, was used, and statistical analysis was performed with Pearson's Chi2 and the prevalence ratio. Results: The risk factor with the highest presence was secondary osteoporosis in 51.9 percent, where 13 percent reported FRAX® + for a 10-year probability of major osteoporotic fracture and 14.8 percent obtained FRAX®+ for a 10-year probability of hip fracture without bone densitometry. Conclusions: FRAX® is a useful tool in the prevention of health problems resulting from fractures that lead to alterations in functional capacity and movement(AU)

Diabetes mellitus tipo 2: cambios densitométricos del cristalino / Type 2 diabetes mellitus: lens densitometric changes

La diabetes mellitus es la responsable de la quinta parte de todas las cataratas, el sistema de cámara rotatoria scheimpflug permite estudiar a profundidad los primeros cambios en la densidad de estos cristalinos, estableciendo valores densitométricos en pacientes con Diabetes Mellitus tipo 2, con buena agudeza visual sin retinopatía diabética, y comparar dichos valores con un grupo control sin la enfermedad, desde junio de 2017 hasta marzo de 2018. Métodos: se realizó un estudio comparativo, exploratorio y prospectivo, la población y muestra estuvo compuesta por pacientes que acudieron a la consulta oftalmológica del Hospital Domingo Luciani. Resultados: todos los valores densitométricos fueron mayores en los pacientes con diabetes que en los normales. La mayor diferencia se produce en los valores del núcleo, seguido de la cápsula anterior acercándose a la significancia estadística (p=0,02) y (p=0,01) respectivamente. El 75% de los pacientes con diabetes presentaron cambios importantes en densitometría de la cápsula anterior y el 40% en el núcleo. Conclusiones: la cápsula anterior en pacientes con diabetes de menor edad (50 a 60 años) presentó valores más elevados de densitometría con relación a los controles. En los grupos de 61 a 70 y 71 a 80 los valores fueron menores; se concluye que los cambios tempranos en la cápsula anterior se deben a la diabetes. En cuanto al núcleo se observó en el grupo control un incremento progresivo de la densidad a medida que iba aumentando la edad, pero al agregarse el factor diabetes, aumentaron notablemente los valores, acentuando de esta manera la evolución de la catarata senil. La diabetes altera precozmente la densidad de la capsula anterior y núcleo(AU)

Diabetes mellitus is responsible for one fih of all cataracts, the scheimpflug rotary chamber system allows to study in depth the first changes in the density of these lenses, establishing densitometric values in patients with Type 2 Diabetes Mellitus, with good visual acuity without diabetic retinopathy, and compare these values with a control group without the disease, from June 2017 to March 2018. Methods: a comparative, exploratory and prospective study was carried out, the population and sample was composed of patients who attended the ophthalmological consultation of the Domingo Luciani Hospital. Results: all densitometric values were higher in diabetic patients than in normal patients. The greatest difference occurs in the nucleus values, followed by the anterior capsule approaching the statistical significance (p = 0.02) and (p = 0.01) respectively. 75% of diabetic patients presented significant changes in densitometry of the anterior capsule and 40% in the nucleus. Conclusions: the anterior capsule in diabetic patients with younger age (50 to 60 years) presented higher values of densitometry compared to non-diabetics. In the groups of 61 to 70 and 71 to 80 the values were lower; We conclude that the early changes in the anterior capsule are due to diabetes. As for the nucleus, a progressive increase in density was observed in the control group as the age increased, but when the diabetes factor was added, the values increased markedly, thus accentuating the evolution of the senile cataract. Diabetes precociously alters the density of the anterior capsule and nucleus(AU)

Factores relacionados con la masa ósea en hombres de edad mediana / Factors related to bone mass in middle-aged men

RESUMEN Introducción: La osteoporosis representa un problema de salud debido al impacto en la morbilidad, mortalidad, calidad de vida y altos costos. Los factores de riesgo asociados a la osteoporosis han sido poco abordados en hombres cubanos. Objetivo: Determinar la masa ósea y su posible relación con factores sociodemográficos y del estilo de vida en hombres de edad mediana del Policlínico Universitario "Vedado". Métodos: Se realizó un estudio descriptivo transversal que incluyó hombres de edad mediana. De la planilla de recolección de datos se extrajeron: sociodemográficos, estilo de vida y elementos del examen físico. Se realizó densitometría para determinar la masa ósea. Se crearon 4 grupos (de 40-49 y de 50-59 años en L1-L4 y fémur, solo se analizó L1-L4), se determinaron las personas con hueso normal y mala masa ósea (MMO) y se asociaron con los factores de riesgo. Resultados: En los hombres estudiados predominó el hueso normal: L1-L4 (27 = 62,8 por ciento) y fémur (38 = 88,4 por ciento). En los hombres entre 50-59 años, el 85,7 por ciento de los que tenían piel mestiza presentaron MMO, el 100 de los que tenían piel blanca y el 83,3 por ciento de los de piel negra, tuvieron hueso normal (p = 0,017). En los dos grupos, se observó un predominio del hueso normal, en los que tenían alimentación adecuada (100 por ciento) y aceptable (66,6 por ciento). En los de 40-49 años que realizaban actividad física, predominó el hueso normal; de 50-59 la mala masa ósea (6 = 60 por ciento). En ambos grupos, los que consumían bebidas alcohólicas y fumaban, predominaron en el grupo con hueso normal. Conclusiones: La mayoría de los hombres estudiados tenían masa ósea normal, la afectación fue mayor en L1-L4. La mayor edad y el color de piel mestiza, en hombres de 50-59 años, se asociaron con mayor daño óseo; factores del estilo de vida no se relacionaron con la masa ósea(AU)

ABSTRACT Introduction: Osteoporosis represents a health problem due to the impact on morbidity, mortality, quality of life and high costs. The risk factors associated with osteoporosis have been poorly addressed in Cuban men. Objective: To determine the bone mass and its possible relationship with sociodemographic and lifestyle factors in middle-aged men at Vedado University Polyclinic. Methods: A descriptive cross-sectional study was carried out in middle-aged men. From the data collection form were extracted sociodemographic, lifestyle and physical examination elements. Densitometry was performed to determine bone mass. Four groups (40-49 and 50-59 years in L1-L4 and femur were created, only L1-L4 was analyzed). People with normal bone and poor bone mass were identified and associated with risk factors. Results: Normal bone predominated in the studied men, L1-L4 (27 = 62.8 percent) and femur (38 = 88.4 percent). 85.7 percent between 50-99 years with meztizo skin color presented poor bone mass. Normal bone was evidenced in white and black skin subjects (100 and 83.3 percent) (p = 0.017). In both groups, predominance of normal bone was observed in those with adequate (100 percent) and acceptable diet (66.6 percent). In those 40-49 year-old subjects who had physical activity, normal bone predominated; but in those 50-59 year-old subjects, bad bone mass predominated (6 = 60 percent). In both groups, normal bone predominated in those who consumed alcoholic beverages and smoked in both groups. Conclusions: Most of the men studied had normal bone mass, the affectation was greater in L1-L4. Older age and mestizo skin color in 50-59 year-old men were associated with greater bone damage. Lifestyle factors were not related to bone mass(AU)

Incidencia de diagnóstico y tratamiento de la osteoporosis en pacientes con fractura de radio distal / Diagnosis and treatment incidence of osteoporosis in patients with distal radius fracture

Introducción: Las fracturas de radio distal en pacientes mayores son un indicador de osteoporosis. El objetivo de este estudio fue determinar el diagnóstico y el tratamiento de la osteoporosis en pacientes con fractura de radio distal, operados en nuestra institución, entre 2012 y 2014. Materiales y Métodos: Los datos se obtuvieron de entrevistas telefónicas a 41 pacientes mayores, operados por fracturas de radio distal. Las variables evaluadas fueron: sexo, edad, enfermedades asociadas, tabaquismo, fracturas previas, tratamiento antiosteoporótico previo o posterior a la fractura en cuestión, especialidad del médico que solicitó el tratamiento y realización o no de densitometría mineral ósea. Resultados: La muestra incluyó a 41 pacientes (32 mujeres). Veintiséis contaban con una densitometría antes de la fractura (15 con osteoporosis), 11 habían sufrido una fractura por osteoporosis, y sólo 7 recibían tratamiento antiosteoporótico cuando ocurrió la fractura. Luego de la cirugía, solo 4 de ellos continuó con el tratamiento. Se encontró cierta asociación entre una densitometría patológica y la presencia de diabetes tipo 2, no así con otras comorbilidades. La tasa de incidencia anual de osteoporosis, calculada entre todos los pacientes que se atendieron en nuestra institución, en 2014, fue alrededor del 1%. Los traumatólogos solicitaron el 1,5% de todas las densitometrías prescritas dicho año. Conclusiones: Este estudio sugiere que los traumatólogos que se desempeñan en nuestra institución tienen nula o poca participación en la prevención secundaria de la osteoporosis; por esta razón, se consideraría necesario un protocolo de prevención de fracturas secundarias a la osteoporosis. Nivel de Evidencia: IV

Introduction: Distal radius fractures in elderly patients are an indicator of osteoporosis. The aim of this study was to determine osteoporosis diagnosis and treatment rates in patients with distal radius fractures treated surgically at our institution between 2012 and 2014. Methods:Information of 41 patients who underwent surgical intervention for distal radius fracture was obtained through telephone interviews. There were several variables evaluated-age, sex, smoking, comorbidities, previous fractures, preoperative and postoperative osteoporosis treatments, specialty of the physicians prescribing osteoporosis treatment, and a DEXA scan performed. Results: The study included 41 patients (32 women). Twenty-six of them had a DEXA scan performed before the fracture (15 patients evidenced osteoporosis), 11 had suffered previous fractures secondary to osteoporosis. Only 7 patients were under osteoporosis treatment at the moment of the fracture. After surgery, only 4 patients continued treatment. Pathological DEXA scan results had certain degree of association with the presence of type 2 diabetes, but not with other comorbidities. The annual incidence rate of osteoporosis, calculated using all patients served at our institution in 2014, was about 1%. Orthopedic surgeons accounted for only 1.5% of the total number of DEXA scans prescribed that year. Conclusions: Our study suggests that there is poor prevention by orthopedic surgeons of secondary osteoporotic fractures, which is why a national prevention protocol for fractures secondary to osteoporosis would be necessary. Level of Evidence: IV

Guía para el diagnóstico y tratamiento de la osteoporosis, 2018 / Guidelines for the diagnosis and treatment of osteoporosis, 2018

Cinco años después de la primera reunión de consenso para la propuesta de una Guía cubana para el diagnóstico y tratamiento de la osteoporosis se produce en La Habana (15 de mayo de 2017), esta segunda reunión con el propósito de actualizarla. De manera general se mantienen iguales objetivos que en la anterior. En esta versión se incorporan nuevos grupos de riesgo para osteoporosis, se exponen resultados nacionales relacionados con la frecuencia de esta enfermedad, así como el resultado del estudio multicentro (Instituto Nacional de Endocrinología, Hospital Ginecobstétrico "Ramón González Coro", Hospital Provincial Universitario "Arnaldo Milián Castro" y Hospital Provincial Universitario "Camilo Cienfuegos Gorriarán") con alendronato de sodio genérico, relacionado con la prevención de fractura, y un resumen actualizado de los fármacos aprobados para el tratamiento de la osteoporosis. Se reafirman los criterios para diagnóstico y opciones terapéuticas, así como para evaluar la utilidad de la guía(AU)

Development and validation of anthropometric equations to estimate body composition in adult women / Desarrollo y validación de ecuaciones antropométricas para estimar la composición corporal en mujeres adultas

Abstract Objective: To develop anthropometric equations to predict body fat percentage (BF%). Methods: In 151 women (aged 18-59) body weight, height, eight- skinfold thickness (STs), six- circumferences (CIs), and BF% by hydrodensitometry were measured. Subjects data were randomly divided in two groups, equation-building group (n= 106) and validation group (n= 45). The equation-building group was used to run linear regression models using anthropometric measurements as predictors to find the best prediction equations of the BF%. The validation group was used to compare the performance of the new equations with those of Durnin-Womersley, Jackson-Pollock and Ramirez-Torun. Results: There were two preferred equations: Equation 1= 11.76 + (0.324 x tricipital ST) + (0.133 x calf ST) + (0.347 x abdomen CI) + (0.068 x age) - (0.135 x height) and Equation 2= 11.37 + (0.404 x tricipital ST) + (0.153 x axilar ST) + (0.264 x abdomen CI) + (0.069 x age) - (0.099 x height). There were no significant differences in BF% obtained by hydrodensitometry (31.5 ±5.3) and Equation 1 (31.0 ±4.0) and Equation 2 (31.2 ±4.0). The BF% estimated by Durning-Womersley (35.8 ±4.0), Jackson-Pollock (26.5 ±5.4) and Ramirez-Torun (32.6 ±4.8) differed from hydrodensitometry (p <0.05). The interclass correlation coefficient (ICC) was high between hydrodensitometry and Equation 1 (ICC= 0.77), Equation 2 (ICC= 0.76), and Ramirez-Torun equation (ICC= 0.75). The ICC was low between hydrodensitometry and Durnin-Womersley (ICC= 0.51) and Jackson-Pollock (ICC= 0.53) equations. Conclusion: The new Equations-1 and 2, performed better than the commonly used anthropometric equations to predict BF% in adult women.

Resumen Objetivo: Desarrollar ecuaciones antropométricas para predecir el porcentaje de grasa corporal (%GC). Métodos: En 151 mujeres (18-59 años) se midieron peso corporal, estatura, ocho pliegues cutáneos (PCs), seis perímetros (PEs) y el %GC por hidrodensitometría. Se formaron dos grupos al azar, desarrollo de ecuaciones (n=106) y validación (n= 45). En el grupo desarrollo ecuaciones se calcularon modelos de regresión lineal, con las medidas antropométricas como predictores, para encontrar la mejor ecuación de predicción del %GC. El grupo validación se utilizó para comparar el desempeño de las nuevas ecuaciones con las de Durnin-Womersley, Jackson-Pollock y Ramírez-Torun. Resultados: Se seleccionaron dos ecuaciones: Ecuación-1= 11.76 + (0.324 x tríceps PC) + (0.133 x pantorrilla-medial PC) + (0.347 x abdomen PE) + (0.068 x edad-años) - (0.135 x estatura) y Ecuación-2= 11.37 + (0.404 x tríceps PC) + (0.153 x axilar PC) + (0.264 x abdomen PE) + (0.069 x edad-años) - (0.099 x estatura). No hubo diferencias significativas en el %GC obtenido por hidrodensitometría (31.5 ±5.3) y Ecuación-1 (31.0 ±4.0) o Ecuación-2 (31.2 ±4.0). Los %GC estimados por Durning-Womersley (35.8 ±4.0), Jackson-Pollock (26.5 ±5.4) y Ramírez-Torun (32.6 ±4.8) fueron diferentes del obtenido por hidrodensitometría (p <0.05). El coeficiente de correlación intraclase (ICC) fue alto entre hidrodensitometría y las Ecuaciones 1 (ICC= 0.77), 2 (ICC= 0.76), y Ramírez-Torun (ICC= 0.75). El ICC fue bajo entre hidrodensitometría y Durnin-Womersley (ICC= 0.51) y Jackson-Pollock (ICC= 0.53). Conclusión: Las nuevas ecuaciones 1 y 2 presentaron mejor rendimiento que las ecuaciones tradicionales para predecir el %GC en mujeres adultas.

Relação entre resultados da FRAX-Brasil e de densitometrias ósseas / Relationship between the results of FRAX-Brazil and bone densitometries

OBJETIVO: Comparar resultados de densitometrias ósseas e do risco de fratura pela plataforma Fracture Risk Assessment Tool® (FRAX®). Métodos: Estudo observacional, transversal, de natureza quantitativa, realizado por meio da análise de prontuários de indivíduos que realizaram densitometria óssea e seus respectivos laudos, com cálculo posterior do risco de fratura maior e de quadril nos próximos 10 anos pela FRAX®. RESULTADOS: A média de idade foi de 60,19±9,44 anos, e houve predomínio de mulheres (96,5%). Dos indivíduos, 1,1% foi classificado como com risco de fratura maior e 9,1% com risco de fratura de quadril. A osteoporose foi encontrada em 12,4% da amostra, com predomínio nos pacientes mais idosos, e a coluna foi o sítio mais comum (53,7%). Admitindo-se a densitometria óssea como padrão-ouro para diagnóstico de osteoporose, a sensibilidade da plataforma para detectar risco de fratura maior foi 4,5%. Observou-se correlação positiva entre idade e risco de fratura, e negativa entre idade e T-score. CONCLUSÃO: Foi baixa a sensibilidade da plataforma, e não foi importante a relação entre os resultados da densitometria óssea e da FRAX®, sugerindo que esta ferramenta não se mostrou adequada para ser inserida como método de rastreio para osteoporose na população estudada.(AU)

OBJECTIVES: To compare the results of bone densitometry and fracture risk through the platform Fracture Risk Assessment Tool (FRAX®). METHODS: This is a cross-sectional, observational study of quantitative approach performed through the analyses of medical records of individuals who underwent bone densitometry and their respective reports, with a posterior calculation of the risk of major and hip fracture in the next 10 years through FRAX®. RESULTS: The mean age was 60.19±9.44 years, with a predominance of women (96.5%). Of the individuals, 1.1% were classified as having a major fracture risk, and 9.1% as having a hip fracture risk. Osteoporosis was found in 12.4% of the sample, with predominance in the older patients, and the spine was the most common site (53.7%). Assuming bone densitometry as the gold standard for diagnosis of osteoporosis, the sensitivity of the platform to detect major fracture risk was 4.5%. There was a positive correlation between age and fracture risk, and a negative correlation between age and t-score. CONCLUSION: The platform showed low sensitivity, and the relationship between the results of the bone densitometry and FRAX® was not significant, suggesting that this tool is not adequate to be inserted as a screening method for osteoporosis in the studied population.(AU)

Forced degradation of gliquidone and development of validated stability-indicating HPLC and TLC methods

Forced degradation studies of gliquidone were conducted under different stress conditions. Three degradates were observed upon using HPLC and TLC and elucidated by LC-MS and IR. HPLC method was performed on C18 column using methanol-water (85:15 v/v) pH 3.5 as a mobile phase with isocratic mode at 1 mL.min-1 and detection at 225 nm. HPLC analysis was applied in range of 0.5-20 µg.mL-1 (r =1) with limit of detection (LOD) 0.177 µg.mL-1. TLC method was based on the separation of gliquidone from degradation products on silica gel TLC F254 plates using chloroform-cyclohexane-glacial acetic acid (6:3:1v/v) as a developing system with relative retardation 1.15±0.01. Densitometric measurements were achieved in range of 2 -20 µg /band at 254 nm (r = 0.9999) with LOD of 0.26 µg /band. Least squares regression analysis was applied to provide mathematical estimates of the degree of linearity. The analysis revealed a linear calibration for HPLC where a binomial relationship for TLC. Stability testing and methods validation have been evaluated according to International Conference on Harmonization guidelines. Moreover, the proposed methods were applied for the analysis of tablets and the results obtained were statistically compared with those of pharmacopeial method revealing no significant difference about accuracy and precision.

Evaluación de score de hueso trabecular (TBS) en pacientes menopáusicas con fracturas y sin ellas / Trabecular bone score evaluation in postmenopausal women with or without fractures

El score de hueso trabecular (TBS, Trabecular Bone Score) es una medición de la textura de los grises derivada de la evaluación del raquis por DXA y proporciona un índice de la microarquitectura ósea. Se ha demostrado que los valores bajos presentan capacidad para predecir fracturas. Nuestro objetivo fue evaluar si existían diferencias entre los valores de TBS de pacientes con fracturas frente a no fracturadas. Materiales y métodos: se revisaron 159 historias clínicas de mujeres menopáusicas que consultaron para evaluación de su salud ósea. Se consideraron los antecedentes autorreferidos de fracturas (Fx), la DMO de raquis, cuello femoral y fémur total y TBS. Resultados: treinta pacientes (18,9%) presentaron fracturas y en ellas se observó menor TBS (con Fx: 1,295±83 vs. sin Fx: 1,366±84, p<0,0001), menor índice de masa corporal (IMC) (con Fx: 23,7±1,9 vs. sin Fx: 25,7±4,2, p=0,02), sin diferencias en la edad (p=0,39), ni en valores de DMO (L1-L4 p=0,11, cuello femoral p=0,20 y fémur total p= 0,12). Muchas de las fracturas ocurrieron en pacientes sin osteoporosis por DXA. Conclusiones: el TBS aumentaría la capacidad de DXA para identificar a mujeres argentinas en riesgo de padecer fracturas sin tener osteoporosis densitométrica. Este es el primer trabajo realizado en la Argentina con medición de TBS. (AU)

Trabecular Bone Score (TBS) is a measure of the grey scale derived from DXA lumbar image and provides information about microarchitecture. It has been shown that low TBS values can predict fractures. Our objective was to evaluate if there are any differences between the TBS values in patients with fractures vs. non-fractures. Materials and methods: We reviewed 159 medical records of menopausal women who consulted for evaluation of their bone health. Self-reported fractures (Fx), spine BMD, femoral neck and total femur and TBS were evaluated. Results: thirty patients (18.9%) presented fractures and they showed lower TBS (with Fx: 1,295±0,083 vs. without Fx: 1,366±0,084, p<0.0001), lower body mass index (BMI) (with Fx: 23.7±1.9 vs. without Fx 25.7±4.2, p=0.02), without differences in ages (p=0.39) or in BMD values (L1-L4 p=0.11, femoral neck p=0.20 and total femur p=0.12). Some fractures occurred in patients without osteoporosis, as determined by DXA. Conclusions: TBS would increase the ability of DXA to identify Argentine women at risk for fractures without densitometric osteoporosis. This is the first work done in Argentina with TBS measurement. (AU)

Osteoporose: identificando o risco de fratura / Osteoporosis: targeting the risk of fracture

A osteoporose é a doença do metabolismo ósseo mais comum, afetando cerca de 200 milhões de pessoas em todo o mundo. As fraturas por fragilidade, sua consequência mais temida, são a maior causa da diminuição da qualidade de vida, morbidade e mortalidade feminina na pós-menopausa. Entretanto, identificar as mulheres com risco de fratura e que beneficia -se-ão do tratamento farmacológico é desafiado . Metodologias de seleção são falhas, sendo intenso o debate atual sobre o tratamento excessivo versus deficien e. A definição da probabilidade de fratura em termos absolutos, utilizando fatores de risco clínicos e avaliação da densidade óssea, com auxílio de ferramentas clínicas, é a forma utilizada atualmente na seleção de indivíduos para tratamento. O ginecologista precisa conhecer e dominar esta abordagem para realizar uma boa assistência a mulheres com osteoporose.

Osteoporosis is the most common disease of bone metabolism, affecting approximately 200 million people worldwide. The fragility fractures, his most feared consequence, are a major cause of decreased quality of life, morbidity and mortality in postmenopausal women. However, identifying women with high risk of fracture which will benefit from pharmacological treatment is challenging. Screening methodologies are not accurate leading to an intense debate about over versus sub treatment. Acquiring probability of fracture, using clinical risk factors and bone mass, with clinical tools assistance, is the best way to select individuals for treatment. The gynecologist must know and master this approach to make a good assistance to women with osteoporosis.

A simple and fast sampling method for chemical analyses and densitometry of bones through rib biopsies in cattle / Uma técnica simples e rápida de amostrar costelas para análises químicas e densitométricas por meio de biópsias em bovinos

We developed and evaluated a fast and simple method to obtain suitable bone samples for densitometry and chemical analysis through biopsies of the 12th rib of cattle. The postoperative recovery, dry matter intake (DMI) and average daily weight gain (ADG) was evaluated in 36 Nellore steers, nine of which were randomly selected for the control group and 27 others were rib biopsied. Every 30 days, rib biopsy was performed in nine steers, using a corded-electric pistol-grip drill coupled with a hole saw of a 3mm diameter pilot drill bit. This rib biopsy technique provided a suitable sample obtained in a fast way and allowed the surgeon to work alone with the animal slightly sedated and restrained in the crush. Dry matter intake (DMI) was not affected in biopsied animals. At the end of the experimental period (116 days) the average daily weight gain (ADG) was similar in the steers biopsied or not. The described method provided rib samples from cattle suitable for densitometry and chemical analysis of bone tissue without effects on health and performance. This information could greatly increase the accuracy for the diagnosis of phosphorus deficiency in cattle raised on pasture and allow the evaluation of bone metabolism in experimental animals.(AU)

No presente estudo foi desenvolvida uma técnica para se obter, de forma rápida e simples, amostras da 12a costela bovina por meio de biópsias. Avaliou-se a recuperação pós-operatória (durante 15 dias), o consumo de matéria seca (CMS) e o ganho de peso diário (GMD) de 36 novilhos Nelores, sendo nove animais controles e 27 submetidos à biópsia. A cada 30 dias biópsias de costelas foram realizadas em nove animais, usando uma furadeira elétrica acoplada a uma serra-copo com uma broca-guia de 3mm de diâmetro. Esta técnica de biópsia permitiu obter amostras ósseas de forma rápida, com o cirurgião operando sozinho e com os animais levemente sedados e em estação. Ao término do experimento (116 dias) o CMS e o GMD não foram afetados pelo procedimento cirúrgico. As amostras obtidas foram adequadas para exames radiográficos e subsequentes análises químicas. O conjunto de informações adquiridas com a técnica de biópsia de costelas permite aumentar a exatidão no diagnóstico da deficiência de fósforo em bovinos criados em pastagens e também realizar estudos sobre metabolismo ósseo em animais experimentais.(AU)

Low-level laser therapy associated to a resistance training protocol on bone tissue in diabetic rats

ABSTRACT Objective The present study aimed to evaluate the in vivo response of a resistance training and low-level laser therapy (LLLT) on tibias and femurs of rats with diabetes mellitus (DM). Materials and methods Forty male Wistar rats were randomly distributed into four experimental groups: control group (CG), diabetic group (DG), diabetic trained group (TG) and diabetic trained and laser irradiated group (TLG). DM was induced by streptozotocin (STZ) and after two weeks laser and resistance training started, performed for 24 sessions, during eight weeks. At the end of the experiment, animals were euthanized and tibias and femurs were removed for analysis. Histological, histomorphometrical, immunohistochemistry and mechanical analyses were performed. Results Trained groups, with or without laser irradiation, showed increased cortical area, bone density and biomechanical properties. The immunohistochemical analysis revealed that TG and TLG demonstrated an increased RUNX2 expression. RANK-L immunoexpression was similar for all experimental groups. Conclusion In conclusion, it can be suggested that the resistance exercise program stimulated bone metabolism, culminating in increased cortical tibial area, bone mineral content, bone mineral density and biomechanical properties. Furthermore, the association of physical exercises and LLLT produced higher values for bone mineral content and stiffness. Consequently, these data highlight the potential of physical exercise in the management of bone loss due to DM and the possible extra osteogenic stimulus offered by lasertherapy. Further long-term studies should be carried out to provide additional information.

Asymptomatic vertebral fractures in patients with low bone mineral density / Fraturas vertebrais assintomáticas em indivíduos com baixa massa óssea

Summary Objective: Vertebral fracture assessment (VFA) is a test technique that can be used to detect asymptomatic vertebral fractures (AVF). It uses dual energy X-ray bsorptiometry (DXA) and can be performed concurrently with bone densitometry. This study aims to assess the prevalence of AVF in patients with low bone mass. Methods: Cross-sectional study including 135 individuals with low bone mineral density (BMD) with a T-score < -2.0 standard deviation (SD) in a densitometry clinic located in the city of Blumenau (state of Santa Catarina). Anthropometric, clinical and lifestyle variables were obtained from history-taking and physical examination. Densitometric variables were obtained by bone mineral densitometry and VFA (Explorer, Hollogic®). Vertebral fractures were classified according to the Genant criteria. Student's t, chi-square and logistic regression were performed for statistical analysis. Results: AVFs occurred in 24.4% of the subjects. They were older compared to those without AVF (65±9.25 versus 60.1±8.66; p=0.005), and had a history of lowimpact fractures (38.24% versus 19.8%; OR 2.5; p=0.03). Half of the patients that reported steroid therapy had AVFs, compared to one fifth of those who did not use steroids (50% versus 21.49%; OR 3.6; p=0.01). Conclusion: Asymptomatic vertebral fractures were present in approximately one fourth of patients. The risk factors associated were history of low-impact fracture, use of steroids and age > 61 years.

Resumo Objetivos: vertebral fracture assessment (VFA) é uma técnica de exame que pode ser aplicada na detecção de fraturas vertebrais assintomáticas (FVA). Utiliza absorciometria de raios-X de dupla energia (DXA) e pode ser realizada concomitantemente ao exame de densitometria óssea. Este estudo visa a avaliar a prevalência de FVA em indivíduos com baixa massa óssea. Métodos: estudo transversal realizado em 135 indivíduos, com baixa densidade mineral óssea (DMO), com T-score < -2,0 desvio padrão (DP), em uma clínica de densitometria de Blumenau (SC). As variáveis antropométricas, clínicas e referentes ao estilo de vida foram obtidas por anamnese e exame clínico; as variáveis densitométricas foram obtidas por DMO e VFA (aparelho modelo Explorer, marca Hollogic®). As fraturas vertebrais foram classificadas de acordo com os critérios de Genant. Os testes estatísticos foram t de student, qui-quadrado e regressão logística. Resultados: FVA ocorreram em 24,4% dos indivíduos. A idade desses indivíduos foi superior à dos indivíduos sem FVA (65±9,25 vs. 60,1±8,66; p=0,005), assim como o antecedente de fratura por baixo impacto (38,24% vs.19,8%; OR 2,5; p=0,03). A metade dos indivíduos que relataram corticoterapia possuíam FVA, contrastando com um quinto dos indivíduos sem corticoterapia (50% vs. 21,49%; OR 3,6; p=0,01). Conclusão: fraturas vertebrais assintomáticas estiveram presentes em aproximadamente um quarto dos pacientes. Os fatores de risco associados foram história de fratura por baixo impacto, corticoterapia e idade > 61 anos.

Osteoporosis del varón: hallazgos clínicos y de la densitometría ósea en 70 casos / Frequency and causes of osteoporosis among males referred for bone densitometry

Background: Among males, osteoporosis is less common than in women, but can also be a health issue. Aim: To report the frequency and clinical manifestations of osteoporosis among males referred to perform a bone densitometry. Material and Methods: All densitometries performed during one year at a clinical institution were analyzed and those corresponding to males aged over 18 years were selected to review the clinical record of the patient. Osteoporosis was defined as a bone mineral density T score < -2.5 among males aged over 50 years or a Z score below -2.0 and a history of osteoporotic fracture among males aged less than 50 years. Results: Of 5792 densitometries performed, 439 (8 percent) corresponded to males aged more than 18 years. Among these 156 (82 percent aged more than 50 years) had an abnormal densitometry. Seventy patients had osteoporosis, (67 percent only by DXA) and the rest had an osteoporotic fracture. Mean age and body mass index of the latter was 62 +/- 15 years and 25.9+/- 3 kg/m2, respectively. Forty two percent had osteoporosis in the spine, 35 percent in the hip and 23 percent in both sites. Thirty six of the 70 patients with osteoporosis (51 percent) had a history of osteoporotic fracture in column, hip, wrist and other sites in 55, 11, 8 and 26 percent respectively. Seventy eight percent of these patients were aged more than 50 years. The most common causes of osteoporosis were idiopathic in21 percent, induced by glucocorticoids in 20 percent, associated with vitamin D deficiency in 16 percent and associated to chronic renal failure in 14 percent. Conclusions: One of six male referred for bone densitometry have osteoporosis, usually associated with other underlying diseases. In half of these patients, osteoporosisis severe.

Densidad ósea volumétrica vertebral obtenida sin fantoma en estudios de rutina de tomografía computarizada de abdomen: correlación con los valores medidos por densitometría ósea areal por rayos X / Phantom-less volumetric vertebral density obtained from routine abdominal ct studies: correlation with data obtained by DXA

La densidad mineral ósea (DMO) por tomografía computarizada cuantitativa (QCT) mide con exactitud y precisión de corto plazo la densidad volumétrica (DMOv) de secciones axiales de los cuerpos vertebrales lumbares valiéndose de un fantoma de calibración. Existe evidencia de que la densitometría por TC sin fantoma convirtiendo las unidades Hounsfield en g/cm3 aplicando un coeficiente específico para cada equipo, presenta muy alta correlación con la DMO por QCT y que es confiable para evaluar la densidad ósea vertebral. Apoyándonos en ello, correlacionamos DMO y CMO estimados a partir de estudios de TC con los obtenidos por DXA. Se incluyeron 28 mujeres (edad: 63,4±10,3 años, rango: 37-85) que habían realizado una TC de abdomen y previamente una DMO en un lapso previo no mayor de 6 meses. Se midieron: 1) TC: DMOv promedio integral (trabecular + cortical) en un corte axial medio vertebral de 10 mm de espesor y el área en cm2 . Se multiplicó la densidad por el área, obteniendo un valor equivalente al CMO de la sección (CMO-TC) y 2) DXA: se consideraron la DMOa y CMO en una RI de 10 mm de altura a nivel del centro de la vértebra L3. Las correlaciones entre los parámetros homólogos obtenidos por ambos métodos fueron significativas: resultó superior para CMO [DMOv vs. DMOa r: 0,67 (p=0,005) y CMO-TC vs. CMO-DXA r: 0,75 (p=0,00063)]. El estudio complementa los ya existentes y abre la posibilidad de utilizar estudios de rutina de TC de abdomen para evaluar la densidad ósea, para lo cual deberán establecerse valores de referencia sexo y edad específicos. (AU)

Conventional quantitative computed tomography (QCT) uses a calibration phantom scanned simultaneously with the anatomical region of interest and measures bone density accurately and with short-term high precision. Evidence supports that phantom-less volumetric BMD highly correlates with QCT BMD and is a reliable method for assessing bone density of vertebral bodies. Assessment of BMD in routine abdominal CT scans has been investigated in recent years. The aim of the study was to correlate BMD and bone mineral content (BMC) obtained from CT studies with data obtained by DXA. Twenty eight women (age 63.4±10.3 years old, range: 37-85) who underwent abdominal CT for different reasons and DXA measurements within 6 months were included. A simple manual region of interest (RI) which delineated the edge of the vertebral body was applied to L3. We measured 1) CT: Volumetric integral density (BMDv) -trabecular and cortical bone- of the axial section and area (A) in cm2 . Density was multiplied by area to obtain a value equivalent to BMC. 2) DXA: BMD and BMC in a RI of 10 mm height in the middle of L3. All parameters obtained by CT correlated significantly with the corresponding to DXA : BMDv vs BMDa r: 0.67 (p=0.005) y BMC-CT vs BMC-DXA: r: 0.75 (p=0.00063). This study complements previous reports and opens the possibility of using routine abdominal CT studies to assess bone density. For that purpose reference values (age and gender) must be established. (AU)

Volume da gota dos colírios lubrificantes: estudo farmacoeconômico / Drop volume of artificial tear solutions: pharmacoeconomic study

RESUMO Objetivo: Determinar o volume médio das gotas produzidas pelos colírios lubrificantes em diferentes ângulos de inclinação e determinar o custo médio do tratamento. Métodos: Determinação do volume da gota de 3 frascos originais dos colírios lubrificantes Artelac®, Hylo Comod®, Lacrima® Plus, Systane® UL, Lacrifilm®, Hyabak®, Lacribell®, Ecofilm®, Mirugell®, Plenigell®, Fresh Tears®, Optive® e Endura® à inclinação de 90º e 45º. Determinou-se o número médio de gotas em cada frasco e foi feita avaliação farmacoeconômica dos colírios. Resultados: O volume das gotas variou de 32,2 a 64,0 µL a 45o e de 29,1 a 65,1 µL a 90o. A diferença entre as gotas em cada inclinação foi de 2 a 24% e o custo anual dos colírios de acordo com a inclinação variou de R$2,73 a R$130,73. A Duração Máxima de Tratamento (DMT) foi de 29,3 a 51,4 dias na inclinação de 45o, e de 28,8 a 48,4 dias a 90º, sendo que a diferença na DMT foi de 0,5 até 8 dias a mais ou a menos, de acordo com a marca. Conclusão: Nenhum dos colírios estudados apresentou gotas ideais para o olho humano, levando a um desperdício do produto e maior custo para o fabricante e para o consumidor. Percebemos que existe uma variação significativa no volume da gota de acordo com a inclinação do frasco, e que uma variação maior do que 10% traria impactos financeiros para o paciente.

ABSTRACT Objective: To determine the mean drop volume produced by artificial tear solutions in different inclination angles and to determine the mean cost of the treatment. Methods: The drop volume of 3 original bottles of the artificial tear solutions Artelac®, Hylo Comod®, Lacrima® Plus, Systane® UL, Lacrifilm®, Hyabak®, Lacribell®, Ecofilm®, Mirugell®, Plenigell®, Fresh Tears®, Optive® and Endura® were determined at the inclination of 90º and 45º. The mean number of drops in each bottle was determined and a pharmacoeconomic evaluation of the drops was made. Results: The drop volume ranged from 32.2 to 64.0 µL at 45º and from 29.1 to 65.1 µL at 90º. The difference between drops in each inclination varied from 2 to 24%. The annual cost was from R$2,73 to R$130,73 according to the inclination of the bottle. The Maximum Duration of Treatment (MDT) was from 29.3 to 51.4 days at 45o and from 28.8 to 48.4 days at 90º, being the difference in MDT from 0.5 to 8 more or less days depending on each brand. Conclusion: None of the collyria studied presented ideal drops for human eyes, leading to a waste of the product and higher cost for the manufacturer and the consumer. We noted that there is a significant variation in the drop volume according to the inclination of the bottle, and that a variation of over 10% would bring financial impact for the patient.

Densitometría mineral ósea por tomografía computada / Bone mineral densitometry by computed tomography

La tomografía computarizada cuantitativa (QCT) es una técnica de medición real de la densidad ósea (DMO), en forma volumétrica (g/cm3) mediante ROI (región de interés), sin interferencias propias ni externas en el esqueleto axial o periférico. Otros métodos, tales como DXA (de las siglas inglesas Dual Energy X-ray Absorptiometry) sólo proporcionan estimaciones en proyección de la densidad ósea, generando sus resultados en proyección de área (g/cm3), no proporcionando un verdadero valor de la profundidad de la región. La atenuación ultrasónica, tasa de transmisión del ultrasonido (US) sólo pueden reflejar la arquitectura ósea. Esto concluye que la tomografía computarizada cuantitativa (QCT) proporciona predicciones válidas de la masa ósea trabecular, cortical y volumétrica, y de la capacidad mecánica del hueso, con la posibilidad de medición muscular regional (LRM) de gran importancia para la evaluación de la relación músculo/hueso.