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      Aplicación seriada de paricalcitol intranodular ¿Es eficaz en el tratamiento del hiperparatiroidismo secundario refractario? Translated title: Serial intranodular application of paricalcitol Is effective in the treatment of secondary refractory hyperparathyroidism?

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          Abstract

          Objetivo: determinar la eficacia del paricalcitol en la reducción de los niveles de PTH intacta (PTHi) al aplicarlo directamente en las glándulas paratiroides en pacientes con enfermedad renal crónica estadio 5 (ERC E5) en terapia dialítica con hiperparatiroidismo refractario e hiperplasia nodular. Material y métodos: pacientes con ERC E5 en terapia de diálisis e hiperparatiroidismo secundario refractario y en quienes por ecografía de cuello se detectó hiperplasia de más de una glándula paratiroides, caracterizada por un volumen mayor de 500 mm³. A cada paciente por guía ecográfica dirigida se le aplicó 0.5 cc (2.5 ugs) de paricalcitol (Zemplar®) en cada glándula hiperplásica independientemente de su tamaño, y según el grupo. En el grupo 1 (G1) recibieron paricalcitol semanal para un máximo de dos glándulas por sesión siempre del mismo lado y por un total de dos dosis por glándula; para el grupo 2 (G2) paricalcitol cada 15 días en esquema semejante al grupo 1 para un total de dos dosis por glándula y finalmente para el grupo 3 (G3) paricalcitol cada mes, pero en cada sesión se inyectaron todas las glándulas para un total de cuatro dosis por glándula. Diseño: estudio de intervención sin grupo control. Análisis estadístico: se evaluó si la intervención daba lugar a reducción significativa en los valores de PTHi, y las variables calcio, fósforo, calcio x fósforo y fosfatasa alcalina. Resultados: en el G1 (seis pacientes) se encontró una disminución estadísticamente significativaentre el nivel promedio de PTHi inicial y PTHi a los 30 días de iniciado el tratamiento (p=0.0077), pero no a los 51 ni 81 días. En el G2 (seis pacientes) al comparar la PTHi inicial, con el valor detectado a los 51, 75, 105 y 135 días posaplicación de la última dosis de paricalcitol, no hubo cambios significativos. En el G3 (cuatro pacientes)con relación a la PTHi inicial hubo reducción significativa en sus valores a los 60 días (p=0.012), 120 días (p=0.0099) y 180 días (p=0.00095), pero no a los 240 días (p=0.214049). En las demás variables (calcio, fósforo, calcio x fósforo, fosfatasa alcalina) no se detectaron cambios significativos en ningún grupo. No se presentaron complicaciones importantes. Conclusiones: en pacientes con ERC E5, en terapia de diálisis e hiperparatiroidismo secundario refractario, la administración de paricalcitol intranodular logra reducir significativamente los nivelesde PTHi, siempre y cuando se administre en grupos de dos glándulas con un intervalo de tiempo no superior a una semana, o por administración mensual simultanea de todas las glándulas. (Acta Med Colomb 2015; 40: 125-131).

          Translated abstract

          Objective: go determine the effectiveness of paricalcitol in reducing the levels of intact PTH (iPTH) when applied directly on the parathyroid glands in patients with Grade 5 chronic kidney disease (CKD G5) with refractory hyperparathyroidism and nodular hyperplasia in dialysis therapy. Materials and methods: CKD G5 patients on dialysis therapy with refractory secondary hyperparathyroidism in whom through neck echography hyperplasia of more than one parathyroid gland characterized by a volume greater than 500 mm³ was detected. Through directed ultrasound guidance to each patient 0.5 cc (2.5ugs) of paricalcitol (Zemplar®) was applied in each hyperplasticgland regardless of size and according to the group. Group 1 (G1) received weekly paricalcitol for up to two glands per session always on the same side, for a total of two doses per gland; Group 2 (G2) received paricalcitol every 15 days in similar scheme as group 1 for a total of two doses per gland and finally for group 3 (G3) paricalcitol each month, but in every session all the glands were injected for a total four doses per gland. Design: intervention study with no control group. Statistical analysis: an assessment whether the intervention resulted in significant reduction in iPTH and variables calcium, phosphorus, calcium x phosphorus and alkaline phosphatase, was made. Results: In G1 (six patients), a statistically significant decrease between the average level of initial iPTH and iPTH at 30 days of starting treatment (p = 0.0077), but not at 51 or 81 days was found. In G2 (six patients) by comparing the initial iPTH, with the detected value at 51, 75, 105 and 135 days post-application of the last dose of paricalcitol, there were no significant changes. In G3 (four patients) relative to the initial iPTH there was significant reduction in their values at 60 days (p = 0.012), 120 days (p = 0.0099) and 180 days (p = 0.00095), but not at 240 days (p = 0.214049). On the other variables (calcium, phosphorus, calcium x phosphorus, alkaline phosphatase), no significant changes were detected in either group. No major complications occurred. Conclusions: in patients with CKD G5 in dialysis therapy and refractory secondary hyperparathyroidism, administration of intranodular paricalcitol achieves significantly lower levels of iPTH, as long as it is administered in groups of two glands with a time interval not exceeding one week, or by simultaneous monthly administration of all glands. (Acta Med Colomb 2015; 40:125-131).

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          Association of nodular hyperplasia with resistance to cinacalcet therapy for secondary hyperparathyroidism in hemodialysis patients.

          There have been few long-term prospective studies investigating the effect of cinacalcet on secondary hyperparathyroidism with or without nodular hyperplasia. We examined whether the effect of cinacalcet on secondary hyperparathyroidism differed between patients with or without nodular hyperplasia. Stable hemodialysis patients with secondary hyperparathyroidism resistant to conventional treatment received cinacalcet for 12 months. Based on ultrasonography findings, patients were divided into group S (gland < 500 mm(3) without nodular hyperplasia) and group L (gland ≥ 500 mm(3) with nodular hyperplasia). Serum levels of intact parathyroid hormone, bone-specific alkaline phosphatase, osteocalcin, and cross-linked N-terminal telopeptide of type 1 collagen were measured. Thirty-one patients completed the study. The changes of parameters from the baseline did not differ significantly between the two groups after 6 months. However, the percentage reduction of each parameter was significantly smaller in group L compared with group S after 12 months. Nodular hyperplasia is associated with resistance to cinacalcet therapy in patients on chronic dialysis with secondary hyperparathyroidism.
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            Detección de hiperplasia de paratiroides por ultrasonografía y correlación con signos clínicos y de laboratorio en pacientes con enfermedad renal crónica

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              Mineral metabolism, mortality and morbidity in maintenance hemodialysis patients

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                amc
                Acta Medica Colombiana
                Acta Med Colomb
                Asociacion Colombiana de Medicina Interna (Bogotá )
                0120-2448
                April 2015
                : 40
                : 2
                : 125-131
                Affiliations
                [1 ] Universidad de Caldas Colombia
                Article
                S0120-24482015000200009
                628f9e74-6415-4e4c-bed7-be913aac32b2

                http://creativecommons.org/licenses/by/4.0/

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                Product

                SciELO Colombia

                Self URI (journal page): http://www.scielo.org.co/scielo.php?script=sci_serial&pid=0120-2448&lng=en
                Categories
                MEDICINE, GENERAL & INTERNAL

                Internal medicine
                chronic kidney disease,secondary hyperparathyroidism,hiperparatiroidismo secundario,paricalcitol,enfermedad renal crónica

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