RESUMO
Background: ConQoL questionnaire assesses health related quality of life among children with congenital heart diseases. It has a version for children aged 8 to 11 years and anotherfor children aged 12 to 16years. Aim: To validate ConQol questionnaire for Chilean children with a congenital heart disease. Material and Methods: Using a multicentric cross sectional design, 334 children from four hospitals (54% males), were surveyed. Among them 45% were aged 8 to 11 years and 55%, 12 to 16 years. The study involved three stages: cross cultural adjustment of the original questionnaire, pre-test study, and estimation of its psychometric properties. Content, construct and criterion validity and internal consistency with Cronbach's alpha, were assessed. Results: The version for children aged 8 to 11 years and comprised by three domains (symptoms, activity and relationships), obtained and α ≥ 0.60. In the questionnaire for children aged 12 to 16years, there is one more domain called coping, which obtained an α of 0.53, that was different to the other three domains that obtained an α > 0.70. The correlation between Health Quality of Life and Perception of Health Quality of Life was statistically significant for both groups. The association between Health Quality ofLife and health capability was only significant among children aged 12 to 16years (p < 0.01). Conclusions: The adapted ConQol questionnaire matched properly with the original one. The adapted questionnaire is valid and reliable to assess Health Quality ofLife among Chilean children with congenital heart diseases.
Assuntos
Adolescente , Criança , Feminino , Humanos , Masculino , Cardiopatias Congênitas/psicologia , Qualidade de Vida , Inquéritos e Questionários/normas , Chile , Estudos Transversais , Psicometria , Reprodutibilidade dos TestesRESUMO
BACKGROUND: Cardiac tumors are very uncommon at all ages. There are important clinical differences between children and adults in the behavior of these tumors. AIM: To compare the behavior of primary and secondary cardiac tumors, from fetal age to adults. PATIENTS AND METHOD: Multicentric retrospective analysis of 38 children and adults with cardiac tumors, evaluated with echocardiography between January 1995 and August 2001. Medical records, echocardiographic and radiological examinations, surgical protocols and pathologic examinations were reviewed. Follow-up was obtained through data on medical records or calling patients by telephone. RESULTS: Tumors were diagnosed in 38 patients (13 children and 25 adults), from a total of 31.800 echocardiograms. In children the diagnosis was made by fetal, transthoracic or transesophageal echocardiography in 23.6% and 8% of cases, respectively. Eighty five percent were primary (10 benign and 1 malignant) and 15%, secondary tumors. Fifty four percent were rhabdomyomas and 75% regressed spontaneously. Seventy seven percent were symptomatic and 31% were treated with surgery. During a follow up of 44+/-35 months, 31% of patients died. In adults, 76% of tumors were diagnosed by transthoracic and 20% by transesophageal echocardiography. Seventy six percent were primary (18 benign and 1 malignant) and 24% secondary tumors. Fifty six percent were myxomas. Ninety two percent were symptomatic and 84% were treated surgically. Twenty percent of patients died in the early postoperative period. No adult patients had a follow-up. CONCLUSIONS: Rhabdomyomas were solely found in children. In adults, myxomas are the predominant cardiac tumors. Primary and metastasic malignant tumors are observed both in children and in adults.
Assuntos
Neoplasias Cardíacas/diagnóstico por imagem , Rabdomioma/diagnóstico por imagem , Adulto , Idoso , Idoso de 80 Anos ou mais , Criança , Pré-Escolar , Chile/epidemiologia , Ecocardiografia , Feminino , Coração Fetal/diagnóstico por imagem , Fibroma/diagnóstico por imagem , Fibroma/epidemiologia , Seguimentos , Neoplasias Cardíacas/epidemiologia , Humanos , Lactente , Recém-Nascido , Masculino , Pessoa de Meia-Idade , Mixoma/diagnóstico por imagem , Mixoma/epidemiologia , Gravidez , Estudos Retrospectivos , Rabdomioma/epidemiologia , Ultrassonografia Pré-NatalRESUMO
Background: Cardiac tumors are very uncommon at all ages. There are important clinical differences between children and adults in the behavior of these tumors. Aim: To compare the behavior of primary and secondary cardiac tumors, from fetal age to adults. Patients and Method: Multicentric retrospective analysis of 38 children and adults with cardiac tumors, evaluated with echocardiography between January 1995 and August 2001. Medical records, echocardiographic and radiological examinations, surgical protocols and pathologic examinations were reviewed. Follow-up was obtained through data on medical records or calling patients by telephone. Results: Tumors were diagnosed in 38 patients (13 children and 25 adults), from a total of 31.800 echocardiograms. In children the diagnosis was made by fetal, transthoracic or transesophageal echocardiography in 23.6 percent and 8 percent of cases, respectively. Eighty five percent were primary (10 benign and 1 malignant) and 15 percent, secondary tumors. Fifty four percent were rhabdomyomas and 75 percent regressed spontaneously. Seventy seven percent were symptomatic and 31 percent were treated with surgery. During a follow up of 44±35 months, 31 percent of patients died. In adults, 76 percent of tumors were diagnosed by transthoracic and 20 percent by transesophageal echocardiography. Seventy six percent were primary (18 benign and 1 malignant) and 24 percent secondary tumors. Fifty six percent were myxomas. Ninety two percent were symptomatic and 84 percent were treated surgically. Twenty percent of patients died in the early postoperative period. No adult patients had a follow-up. Conclusions: Rhabdomyomas were solely found in children. In adults, myxomas are the predominat cardiac tumors. Primary and metastasic malignant tumors are observed both in children and in adults.
Assuntos
Adulto , Idoso , Idoso de 80 Anos ou mais , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Pessoa de Meia-Idade , Gravidez , Neoplasias Cardíacas , Rabdomioma , Chile/epidemiologia , Ecocardiografia , Coração Fetal , Fibroma/epidemiologia , Fibroma , Seguimentos , Neoplasias Cardíacas/epidemiologia , Mixoma/epidemiologia , Mixoma , Estudos Retrospectivos , Rabdomioma/epidemiologia , Ultrassonografia Pré-NatalRESUMO
Antecedentes: El reemplazo valvular mitral (RVM) y aórtico (RVA) es poco frecuente en pacientes pediátricos y las series publicadas reportan elevada morbi-mortalidad. Objetivo: Evaluar los resultados a mediano plazo en niños sometidos a RVM y RVA durante los últimos diez años, con el fin de determinar morbimortalidad y calidad de vida. Método: Análisis retrospectivo de 26 niños consecutivos (mediana de edad 5,6 años) sometidos a RVM y RVA, entre marzo 1992 y junio 2003. Diecisiete presentaban patología mitral y once aórtica. Resultados: Se realizaron 26 operaciones implantando 28 prótesis (26 mecánicas y 2 biológicas). Tres pacientes (12 por ciento) fallecieron durante el primer mes. La mediana de seguimiento fue de 6,2 años. Tres pacientes con RVM fallecieron alejadamente por causa no atribuible al reemplazo valvular con una sobrevida actuarial de 87 por ciento. Tres pacientes requirieron reoperación. Todos realizan actividades adecuadas a su edad, restringiéndose los deportes de contacto. Conclusión: Los resultados a mediano plazo del reemplazo valvular en niños con valvulopatía grave son satisfactorios.
Assuntos
Masculino , Adolescente , Humanos , Feminino , Lactente , Pré-Escolar , Criança , Próteses Valvulares Cardíacas , Implante de Prótese de Valva Cardíaca , Valva Aórtica/cirurgia , Valva Mitral/cirurgia , Anticoagulantes/uso terapêutico , Bioprótese , Seguimentos , Implante de Prótese de Valva Cardíaca/instrumentação , Implante de Prótese de Valva Cardíaca/mortalidade , Falha de Prótese , Reoperação , Estudos Retrospectivos , Taxa de Sobrevida , Resultado do TratamentoRESUMO
Background : Streptococcus agalactiae or group B streptococcus, GBS, is the leading cause of neonatal and maternal infections and an opportunistic pathogen in adults with underlying disease. In the last decade, a dramatic increase in the resistance of this microorganism to erythromycin and clindamycin has been observed. Aim: To determine the serotype distribution and antimicrobial susceptibility of isolates of S agalactiae collected from infections and colonization and to assess the genetic mechanisms of macrolide and clindamycin resistance. Material and methods: A total of 100 GBS isolates were collected between 1998 and 2002, in Santiago, Chile. They were isolated from the amniotic fluid from patients with premature rupture of membranes (7 isolates), blood from neonatal sepsis (10 isolates), neonate colonizations (2 strains), skin and soft tissue infections (7 isolates), urinary tract infections (5 isolates), genital infections (3 isolates), articular fluid (one isolate), and 65 strains were recovered from vaginal colonization55. Results: Serotypes Ia, II and III were the predominant serotypes identified in our study, accounting for 90 (90 percent) of the strains. Five isolates belonged to serotypes Ib (5 percent) and two (2 percent) to serotype V respectively; no strains belonging to serotype IV were found. All strains were susceptible to penicillin G, ampicillin and cefotaxime, and four isolates (4 percent) were resistant to both erythromycin (MIC >64 µg/ml) and clindamycin (MIC >64 µg/ml). The strains had a constitutive macrolide-lincosamide-streptogramin (cMLSB) resistance phenotype and the erm(A) gene was present in the four isolates. Conclusions: Serotypes Ia, II and III were the predominant serotypes in this study. All strains were susceptible to penicillin G, ampicillin and cefotaxime, and four (4 percent) strains were resistant to both erythromycin and clindamycin. The cMLSB resistance phenotype, and the erm(A) gene was detected in resistant strains (Rev MÚd Chile 2004; 132: 549-55).
Assuntos
Streptococcus agalactiae/isolamento & purificação , Streptococcus agalactiae , Ampicilina/farmacologia , Cefotaxima/farmacologia , Clindamicina/farmacologia , Eritromicina/farmacocinética , Penicilinas/farmacologia , Resistência Microbiana a Medicamentos , Sorotipagem , Testes de Sensibilidade Microbiana/métodos , Tetraciclina/farmacologiaRESUMO
Background: Norwood procedure is used as the first stage in the palliative treatment of the hypoplastic heart syndrome and can be used, with some technical modifications, in other forms of univentricular heart with aortic stenosis or hypoplasia. These patients have a high mortality (50 percent), derived from the procedure itself and from their abnormal physiological status. Aim: To report our experience with the Norwood procedure. Patients and methods: Retrospective analysis of all patients subjected to the Norwood procedure between February 2000 and June 2003. Results: Thirteen patients (9 females, age range 5-60 days and median weight of 3.3 kg) were operated. Eight had hypoplastic heart syndrome and five had a single ventricle with aortic arch hypoplasia. The diagnosis was done in utero in eight patients. All technical variations, according to the disposition and anatomy of the great vessels, are described. Cardiac arrest with profound hypothermia was used in all and regional cerebral perfusion was used in nine. Three patients died in the perioperative period and three died in the follow up (two, four and 10 months after the procedure). Gleen and Fontan procedures were completed in five and one patients, respectively. Conclusions: Our results with the Norwood procedure are similar to other series. There is an important mortality in the immediate operative period and prior to the Glenn procedure (Rev MÚd Chile 2004; 132: 556-63).
Assuntos
Humanos , Masculino , Feminino , Recém-Nascido , Lactente , Síndrome do Coração Esquerdo Hipoplásico , Cardiopatias Congênitas/cirurgia , Chile , Seleção de PacientesRESUMO
Background: DiGeorge syndrome is characterized by developmental defects of the heart, parathyroid glands and thymus. Aim: To describe the clinical variability of DiGeorge syndrome and its relation with immunodeficiency. Patients and methods: A three years retrospective chart review from three hospitals of Santiago, Chile was conducted. We included patients with neonatal diagnosis of DiGeorge syndrome. Clinical and immuno-logic data were collected from their initial evaluation. Results: We found 9 patients with DiGeorge syndrome. All had dysmorphic facies, hypocalcemia and congenital heart disease. Three patients had hypoparathyroidism, 4 had interrupted aortic arch type B, 4 had tetralogy of Fallot and 1 had coarctation of aorta. Six patients had other malformations and associated diseases. FISH studies, performed in 8 patients, found the 22q11.2 microdeletion in all. Most patients had low CD3, CD4 and CD8 T cell counts, that ranged for CD3 T cells, between 256/mm3 and 3,664/mm3, for CD4 T cells, between 224/mm3 and 2,649/mm3, for CD8 T cells, between 26/mm3 and 942/mm3. Three patients had CD4 T cells counts <400/mm3 and one had a phytohemagglutinin stimulation index <10. Airway malformations and primary hypoparathyroidism were present in 3 out of 4 patients that died before 18 months compared with the surviving patients (p=0.048). Conclusions: We found variable clinical manifestations as well as CD3, CD4 and CD8 T cell counts in patients with DiGeorge syndrome. Airway malformations were associated with a higher mortality (Rev Méd Chile 2004; 132: 26-32).
Assuntos
Humanos , Síndrome de DiGeorge/imunologia , Chile , Transtornos CromossômicosRESUMO
Introducción: El sistema inmune no es capaz de reconocer los cambios en células transformadas por mutaciones en la leucemia linfática crónica de estirpe B (LLC-B). Su incubación con linfocitos autólogos no induce citotoxicidad. Puede deberse a la ausencia de linfocitos T citotóxicos o a la incapacidad de las células de LLC en expresar moléculas coestimulatorias (CD80, CD86), a pesar de tener expresión de HLA clase I y II. El ADN bacteriano y los ODNs que contienen motivos PyNTTrrGT, CpG y otros motivos, pueden activar a los monocitos, las células dendríticas y los linfocitos B. Aparte, algunos ODNs tienen efectos directos sobre las células LLC-B. Material y métodos: se incubaron células leucémicas provenientes de 20 pts. con LLC-B con 3 diferentes ODNs: a) IMT504, con motivos PyNTTrrGT b) 2006 con motivos CpG y c) ODN inactivo de control. Previo y posterior a la incubación se efectuaron determinaciones de CD80, CD86, CD40, MHC clase I y II, CD5, CD19 y CD20 por citometría de flujo. Además se determinó (por medio de la detección de fosfatidilserina por la unión ala Anexina V) la capacidad de inducir la apotosis de las células transformadas, y se estudió la morfología de las células en cultivo. Resultados: Se observó el aumento de la detección de fosfatidilserina por la unión ala Anexina V) la capacidad de inducir la apotosis de las células transformadas, y se estudió la morfología de las células en cultivo. Resultados: Se observó el aumento de la expresión de CD80, CD86 y CD40 en las células incubadas con IMT504 y 2006. Además las células LLC-B expresaron significativamente mayor cantidad de Anexina v. La morfología de las células en cultivo a largo plazo mostró las características de apoptosis. Los estudios efectuados con el ODN de control no mostraron ninguna de las características descritas. Conclusión: La incubación de ODN con motivos PyNTTTTGT (IMT504) y con motivos CpG (2006) induce en las células de LLC-B un fenotipo considerado de células presentadoras de antígenos, y además apoptosis. Perspectiva: En otros estudios preclínicos y clínicos los ODNs han demostrado muy baja toxicidad, lo que permitiria efectuar estudios de Fase I/II en LLC-B
Assuntos
Leucemia Linfocítica Crônica de Células B , OligonucleotídeosRESUMO
Introducción: El sistema inmune no es capaz de reconocer los cambios en células transformadas por mutaciones en la leucemia linfática crónica de estirpe B (LLC-B). Su incubación con linfocitos autólogos no induce citotoxicidad. Puede deberse a la ausencia de linfocitos T citotóxicos o a la incapacidad de las células de LLC en expresar moléculas coestimulatorias (CD80, CD86), a pesar de tener expresión de HLA clase I y II. El ADN bacteriano y los ODNs que contienen motivos PyNTTrrGT, CpG y otros motivos, pueden activar a los monocitos, las células dendríticas y los linfocitos B. Aparte, algunos ODNs tienen efectos directos sobre las células LLC-B. Material y métodos: se incubaron células leucémicas provenientes de 20 pts. con LLC-B con 3 diferentes ODNs: a) IMT504, con motivos PyNTTrrGT b) 2006 con motivos CpG y c) ODN inactivo de control. Previo y posterior a la incubación se efectuaron determinaciones de CD80, CD86, CD40, MHC clase I y II, CD5, CD19 y CD20 por citometría de flujo. Además se determinó (por medio de la detección de fosfatidilserina por la unión ala Anexina V) la capacidad de inducir la apotosis de las células transformadas, y se estudió la morfología de las células en cultivo. Resultados: Se observó el aumento de la detección de fosfatidilserina por la unión ala Anexina V) la capacidad de inducir la apotosis de las células transformadas, y se estudió la morfología de las células en cultivo. Resultados: Se observó el aumento de la expresión de CD80, CD86 y CD40 en las células incubadas con IMT504 y 2006. Además las células LLC-B expresaron significativamente mayor cantidad de Anexina v. La morfología de las células en cultivo a largo plazo mostró las características de apoptosis. Los estudios efectuados con el ODN de control no mostraron ninguna de las características descritas. Conclusión: La incubación de ODN con motivos PyNTTTTGT (IMT504) y con motivos CpG (2006) induce en las células de LLC-B un fenotipo considerado de células presentadoras de antígenos, y además apoptosis. Perspectiva: En otros estudios preclínicos y clínicos los ODNs han demostrado muy baja toxicidad, lo que permitiria efectuar estudios de Fase I/II en LLC-B(AU)
Assuntos
Oligonucleotídeos , Leucemia Linfocítica Crônica de Células BRESUMO
Between 1994-2001 we have performed 57 bone biopsies for diagnostic purposes in symptomatic CRF patients. We analyzed here 52 samples where the material was optimal for study, and divided them into 2 periods according to when the biopsy was performed: 1994-1996 and 1997-2001, to verify changes in the spectrum of renal osteodystrophy. Mean serum values were: serum calcium 9.9 +/- 1.8 mg/dl, phosphate 5.8 +/- 3.2 mg/dl, alkaline phosphatase 693.9 +/- 968.9 Ul/L, iPTH 562.0 +/- 598.5 pg/ml, serum aluminum 65.7 +/- 79.3 ug/L and bone aluminum 22.8 +/- 22.4 ug/g. Hyperparathyroidism was the most common histological diagnosis as severe in 13 patients (25%), or as mild in 14 (27%). Ten patients had osteomalacia (19%), adynamic bone disease was diagnosed in 5 (9.6%) and mixed renal osteodystrophy in 10 (19.2%). Low bone turnover patients showed higher bone and serum aluminum than high bone turnover patients. We observed a relative increment in high turnover bone disease in the later period (1997-2001) without changes in low turnover bone disease. These data showed a high prevalence of hyperparathyroidism and aluminum-related low turnover bone disease, with no significant changes between the two time-periods analyzed here.
Assuntos
Osso e Ossos/patologia , Distúrbio Mineral e Ósseo na Doença Renal Crônica/epidemiologia , Adolescente , Adulto , Idoso , Fosfatase Alcalina/sangue , Alumínio/análise , Argentina/epidemiologia , Biomarcadores , Biópsia , Remodelação Óssea , Osso e Ossos/química , Cálcio/sangue , Distúrbio Mineral e Ósseo na Doença Renal Crônica/sangue , Distúrbio Mineral e Ósseo na Doença Renal Crônica/etiologia , Distúrbio Mineral e Ósseo na Doença Renal Crônica/patologia , Feminino , Humanos , Falência Renal Crônica/sangue , Falência Renal Crônica/complicações , Falência Renal Crônica/patologia , Masculino , Pessoa de Meia-Idade , Hormônio Paratireóideo/sangue , Fósforo/sangueRESUMO
Objetivo: evaluar retrospectivamente el rendimiento del cierre del ductus arterioso persistente (DAP) con técnica transcatéter, utilizando espirales (coils) de Gianturco. Pacientes y Métodos: entre octubre de 1996 y septiembre de 2000, 22 pacientes de peso mayor de 10 kg (10,5 a 59), portadores de DAP de hasta 4 mm en su diámetro menor, fueron sometidos a esta técnica de cierre. Bajo sedación con midazolam y ketamina, se efectuó sondeo cardíaco vía arteria y vena femoral derechas, y aortografía. Por medio de un catéter multipropósito se avanzó espiral de Gianturco a través del ductus desde su extremo aórtico hasta posicionario en el DAP. Resultados: se logró cierre angiográfico ductal en 22 pacientes (100 por ciento), observándose mínima filtración residual por ecocardiograma con Doppier color en 3 pacientes (14 por ciento), consignándose ausencia de filtración a los 15 días en dos de ellos. Todos los pacientes fueron dados de alta a las 24 horas. Cuatro pacientes presentaron embolización del espiral, los que fueron recuperados durante el procedimiento. Conclusión: el cierre transcateterismo de DAP con espirales de Gianturco es una técnica segura y efectiva, contituyendo una muy buena alternativa al cierre quirúrgico, con el beneficio adicional de no requerir anestesia general ni toracotomía
Assuntos
Humanos , Masculino , Adolescente , Adulto , Feminino , Lactente , Pré-Escolar , Cateterismo Cardíaco/instrumentação , Permeabilidade do Canal Arterial , Embolização Terapêutica/instrumentação , Aortografia , Cateterismo Cardíaco/métodos , Permeabilidade do Canal Arterial , Embolização Terapêutica/métodos , Estudos RetrospectivosRESUMO
Background: DiGeorge anomaly, velocardiofacial syndrome and conotruncal anomaly face syndrome are part of a group of congenital malformations of the chromosome 22q11 microdeletion syndrome, since they share certain phenotypic features as well as a common genetic abnormality. The malformations include mild facial dysmorphic features, conotruncal heart defects, thymic and parathyroid hypoplasia or aplasia and cleft palate. Aim: To describe the initial clinical presentation of children with clinical and molecular diagnosis of 22q11 microdeletion. Patients and methods: Ten children (seven male) with the phenotypic features of 22q11 microdeletion syndrome are reported. Microdeletion was detected in peripheral Iymphocytes by fluorescent in situ hybridisation (FISH) with the TUPLE-1 DNA probe. Results: Two children had abnormal karyotypes, one of them had a visible deletion and another child had an unbalanced translocation inherited from his mother who had a balanced translocation between chromosomes 14 and 22. Two of the 10 patients had an anterior laryngeal web, a malformation infrequently described in this syndrome. Five patients had the diagnosis of DiGeorge anomaly, had a more serious clinical presentation and a higher early mortality. Conclusions: The high frequency of the 22q11 microdeletion syndrome, estimated at 1:5.000 newborns, and its variable presentations requires a high level of awareness for its early diagnosis and appropriate management of associated complications
Assuntos
Humanos , Masculino , Feminino , Recém-Nascido , Lactente , Pré-Escolar , Cromossomos Humanos Par 22/genética , Deleção Cromossômica , Aberrações Cromossômicas/genética , Fenótipo , Hibridização In Situ , Síndrome de DiGeorge/diagnóstico , Síndrome de DiGeorge/etiologiaRESUMO
En los últimos años se ha observado un progresivo aumento de publicaciones que describen alteraciones del ritmo cardíaco graves, e incluso muerte súbita, en pacientes pediátricos que reciben fármacos habituales de la terapéutica pediátrica. Entre los fármacos mencionados destacan cisaprida y otros de uso gastroenterológico, antibióticos macrólidos, antifúngicos, antihistamínicos y psicotrópicos. Estas complicaciones son poco frecuentes, ocurren en relación a sobredosis, uso combinado de ellos o en determinadas condiciones de mayor susceptibilidad de los pacientes. Estos fármacos pueden prolongar anormalmente el intervalo QT del electrocardiograma, lo que predispone a arritmias ventriculares graves y a muerte súbita. Se revisan algunos de estos fármacos, se describen los mecanismos a través de los cuales producen estas arritmias y se dan recomendaciones para su uso seguro en pediatría, especialmente en pacientes con mayor susceptibilidad, y así prevenir esta seria complicación de la farmacoterapia pediátrica
Assuntos
Humanos , Criança , Morte Súbita/etiologia , Síndrome do QT Longo/induzido quimicamente , Antiarrítmicos/efeitos adversos , Antifúngicos/efeitos adversos , Antipsicóticos/efeitos adversos , Antidepressivos/efeitos adversos , Cisaprida/efeitos adversos , Sistema Enzimático do Citocromo P-450/antagonistas & inibidores , Combinação de Medicamentos , Antagonistas dos Receptores Histamínicos H1/efeitos adversos , Psicotrópicos/efeitos adversos , Taquicardia Ventricular/induzido quimicamenteRESUMO
Urinary excretion of aluminium after a successful transplant can reverse pre-transplant aluminium intoxication. We have evaluated the time course of urinary aluminium excretion and its correlation with several parameters of renal function and mineral metabolism in 49 patients (33 men and 16 women) with a wide range of pre-transplant serum aluminium concentrations, performing sequential determinations at pre-transplant time and at 7, 30, 60, and 90 post-transplant days. Mean serum aluminium at pre-transplant was 54.5+/-46.8 microg/l decreasing progressively to 28.7+/-24.4 microg/l at 90 days (P<0.0002), paralleling the decrease in serum creatinine. Urinary aluminium decreased from 63.0+/-77.9 to 52.4+/-55.9 microg/l at 90 days (P<0.0001). The maximum urinary aluminium/creatinine was 1.8+/-2.7 at 7 days and was associated with the greatest fractional excretion of sodium (4.7+/-5.1%), and the lowest tubular reabsorption of phosphate (55.7+/-25.1%). The fractional excretion of aluminium was also greatest at day 7 (1.1+/-0.9%) when serum creatinine was still elevated (3.6+/-2.3 mg/dl). At each period of time after transplantation fractional excretion of aluminium was similar in all patients despite disparate serum aluminium concentrations. Fractional excretion of aluminium was highest in those patients who developed post-Tx acute tubular necrosis (0.7+/-0.5 vs 1.5+/-1.0%, P=0.008). We found a direct positive correlation (r=0.43; P<0.002) between urinary aluminium and urinary phosphate. Basal levels and sequential changes in serum PTH, calcium, and phosphate did not correlated with fractional excretion of aluminium. These findings suggest: (i) urinary aluminium remains elevated during prolonged periods after transplant and is probably a marker of pre-transplant tissue aluminium accumulation; (ii) post-transplant fractional excretion of aluminium seems to correlated positively with other evidences of renal tubular dysfunction. Early post-transplant tubular malfunction could significantly enhance urinary aluminium elimination.
Assuntos
Alumínio/farmacocinética , Transplante de Rim , Adolescente , Adulto , Idoso , Criança , Creatinina/sangue , Feminino , Humanos , Masculino , Pessoa de Meia-IdadeRESUMO
In this study, 54 patients with relapsed or refractory non-Hodgkin's lymphoma (NHL) were treated in a phase II, multicentric trial with ifosfamide-mesna 1500 mg/m2 IV days 1-3, idarubicin 12 mg/m2 IV day 1 and etoposide 100 mg/m2 IV day 1-3 (MIZE). Overall response was 72%; complete response (CR) and partial response (PR) were 46% and 26% respectively. In Stage I-II pts CR was 59% and in Stage III-IV pts CR was 40.5%. Patients who relapsed from an initial CR had a 64% CR rate when treated with MIZE, in contrast to refractory disease's patients who only had 19% CR (p = 0.004). The group of pts that had an objective response (CR + PR) to front line therapy had a 2 year survival rate of 55% compared with none for refractory disease (p = 0.029) after salvage therapy. Median survival for the entire group was 17.5 months. Better survival was seen in pts who were asymptomatic with low levels of LDH, previous CR, non high-grade histology, and limited disease stage at relapse. Toxicity was mainly hematologic: 91.5% had neutropenia, (56.5% grade III-IV), and 9.5% died from infectious complications. Other clinical toxicities including cardiac toxicity were negligible. MIZE chemotherapy was effective in patients with relapsed and refractory lymphoma and showed limited clinical and cardiac toxicity. Myelosupression was the most frequent single toxicity.
Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Linfoma não Hodgkin/tratamento farmacológico , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Etoposídeo/administração & dosagem , Feminino , Humanos , Idarubicina/administração & dosagem , Ifosfamida/administração & dosagem , Masculino , Mesna/administração & dosagem , Pessoa de Meia-Idade , Recidiva , Terapia de SalvaçãoRESUMO
Aluminium intoxication exerts profound effects on secondary hyperparathyroidism in chronic renal failure and could influence the evolution of post-transplant parathyroid function. We have evaluated 44 patients after successful renal transplantation, sequentially from day 0 up to day 90 from the beginning of graft function, determining serum and urinary aluminium, PTH (intact molecule) and several other parameters of mineral metabolism. Patients were grouped according to their basal serum aluminium: Group LA (n = 25) had serum aluminium less than 40 micrograms/l (mean 21 +/- 10 micrograms/l), and Group HA (n = 19) had serum aluminium greater than 40 micrograms/l (mean 100 +/- 43 micrograms/l). This latter group also had greater urinary aluminium excretion during the study period. Evolution of renal function was similar in both groups. Group LA had increased pre-transplant iPTH (353 +/- 416 pg/ml vs 175 +/- 94, P = 0.05). Seven days after regaining renal function both groups showed a marked decrease in iPTH and then a continued decline up to day 90 with mean serum values of the hormone showing no further differences between groups. The incidence of hypercalcaemia was similar in both groups but no patients in Group HA developed hypercalcaemia at post-transplant day 7 while 12% in Group LA did so. Urinary phosphate excretion and the incidence of post-transplant hypophosphataemia were similar in both groups. These findings suggest: (a) patients with more aluminium intoxication have lower values of pre-transplant iPTH and they correct parathyroid function in a different way than non-intoxicated patients in early post-transplant days; (b) they have lower and later incidence of hypercalcaemia.