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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric nephrology 10 (1996), S. 422-434 
    ISSN: 1432-198X
    Keywords: Key words: North American Pediatric Renal Transplant Cooperative Study   ;   Transplantation   ;   Dialysis   ;   Growth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The North American Pediatric Renal Transplant Cooperative Study (NAPRTCS) is a research effort that was organized and initiated in 1987. The following manuscript is the 1994 NAPRTCS annual report which has summarized data that has been voluntarily contributed by 83 centers. The report includes data on 3,183 patients who have undergone a total of 3,445 renal transplants between 1 January 1987 and 18 February 1994 when the data set was closed. The report also contains data on 1,611 independent courses of dialysis which were initiated between 1 January 1992 and 18 February 1994. This report is meant to update the previous NAPRTCS annual reports as well as demonstrate how the NAPRTCS database has changed clinical practice since its inception. There have been 855 graft failures among the 3,438 transplants. Due to the maturing of the database, chronic rejection now accounts for 34% of graft failures which have occurred over the last year. Graft failure was increased in recipients if the recipients were 〈2 years of age, of the black race, or had received five or more prior transfusions. Early treatment with antithymocyte globulin/antilymphocyte globulin/OKT3 was associated with increased graft survival. Catch-up growth post transplant was only seen in the youngest patients (〈6 years of age). Those patients 〉6 years did not have catch-up growth post transplant. Overall graft survival has improved markedly since the inception of this study. The dialysis database is just maturing and the data confirm that growth on dialysis continues to be very poor. The 1994 annual report of NAPRTCS extends previous findings of this valuable database. It is gratifying to know that early findings of NAPRTCS have led to changes in therapy which have led to improvement in the care of these very special children.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-198X
    Keywords: Renal transplantation ; Immunosuppressive therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The North American Pediatric Renal Transplant Cooperative Study collects extensive data on all transplants entered into its registry. For this study we evaluated 568 cadaver kidney and 492 live-donor recipients with graft function at 30 days post transplant. Utilizing maintenance immunosuppressive therapy at 30 days post transplant we evaluated patient and graft outcome, mortality and morbidity over the first 6 months post transplant. For cadaver kidney recipients, 36 patients were receiving prednisone and azathioprine (PA), 114 were maintained on prednisone and cyclosporine (PC) and 418 were on prednisone, cyclosporine and azathioprine (PCA). Patients receiving PA had a greater incidence of rejection prior to 30 days, a greater incidence of hospitalization for rejection and for hypertension over the next 6 months and a greater loss of allograft in the first 6 months compared with the other two groups. The only difference noted between PC and PCA was a lower serum creatinine in the PCA group at 6 months. For living-related kidney recipients, there were 78 patients maintained on PA, 97 on PC and 317 on PCA. Again patients receiving PA had a higher rate of hospitalization for rejection and a higher rate of graft loss. When patients receiving PC were compared with those receiving PCA, no differences were noted in the 6-month serum creatinine values, but a greater percentage of PCA patients were receiving antibiotics on day 30. We conclude that PA is poor therapy for both groups, PCA is ideal therapy for cadaver kidney recipients, but no beneficial effects are noted when PCA is used over PC for live-related donor kidney transplants.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-198X
    Keywords: End-stage renal disease ; Renal transplantation ; Dialysis ; Graft survival ; Patient survival
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The 1993 North American Pediatric Renal Transplant Cooperative Study annual report summarizes data voluntarily contributed by 82 participating centers on 3,223 pediatric patients who received 2,819 renal transplants from January 1987 through January 1993 and 999 independent courses of dialysis from January 1992 through January 1993. In addition to updating information regarding trends and outcomes in pediatric renal transplantation presented in previous annual reports, 1st-year registry data are presented regarding current practices and trends in chronic dialysis therapy for children and adolescents in North America. Living donor graft (LDG) survival rate was 90% at 1 years 85% at 2 years and 75% at 5 years post transplant. Cadaver graft (CG) survival rates were 76%, 71% and 62% at 1, 2 and 5 years post transplant, respectively. Overall mortality post transplantation continues to be low (CG 6.8%, LDG 4%), mortality remains high in young infants. The dialysis cohort was generally younger than the transplantation cohort. In all age groups, peritoneal dialysis was utilized in the majority of pediatric patients and the overall incidence of peritonitis was 1 episode per 8.2 patient months. External percutaneous catheters were utilized as the predominant chronic hemodialysis access in the study, and access site infections ranged from 6.9% at 1 month to 13.5% at 6 months.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-198X
    Keywords: Key words: Adolescent ; Nephrotic syndrome ; Focal segmental glomerulosclerosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Data are sparse regarding the histological lesions associated with the primary nephrotic syndrome in adolescents. To our knowledge there are only two published articles that have specifically addressed the histopathological lesions that typify idiopathic nephrotic syndrome in the adolescent population. We reviewed our experience from the last 14 years of children between the ages of 12 and 18 years who were referred to our center for the evaluation of the nephrotic syndrome. A total of 29 adolescents met the inclusion criteria for this review. All patients were biopsied prior to the initiation of treatment. The sex ratio consisted of 52% males and 48% females and the racial breakdown was largely African-American, with 83% black adolescents, 7% Hispanic, and 10% Caucasian patients. Minimal change nephrotic syndrome (MCNS), the predominant lesion of children at an early age, was noted in only 20% of patients. The majority of patients (55.2%) had focal segmental glomerulosclerosis (FSGS); 7% had IgM nephropathy and 3.5% had diffuse mesangial hypercellularity. Only 7% of biopsied adolescents had membranoproliferative glomerulonephritis. Our results indicate that the most common lesion in this predominantly African-American patient population is FSGS, with only a small number showing MCNS. Thus, in our experience derived from a racially mixed population, adolescents with the nephrotic syndrome are less likely to have MCNS than younger children.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-198X
    Keywords: Renal transplant ; Malignancy ; Growth ; Immunosuppression ; End-stage renal disease ; Graft survival ; Patient survival
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract From January 1987 to January 1992 the North American pediatric Renal Transplant Cooperative Study registered and followed 2,037 children and adolescents 17 years of age or less who received 2, 197 renal transplants at 75 participating centers in the United States and Canada. The cumulative experience over 5 years of data collection demonstrated trends in renal transplantation practice for pediatric patients. The percentage of live donor organ recipients receiving donor-specific blood transfusions decreased from 40% in 1987 to less than 12% in 1991; random blood transfusions also were used less frequently during the most recent 2 years of the study. Immunosuppressive therapy on posttransplant day 0 or 1 with polyclonal and monoclonal antilymphocyte agents was used in over 40% of transplants. There was also a notable preference for the combined use of prednisone, azathioprine and cyclosporine as maintenance immunosuppression. The percentage of live donor source graft recipients receiving cyclosporine increased from 78% in 1987 to 90% in the most recent year, and considered together, nearly 90% of live donor and cadaver organ recipients received cyclosporine. The observed graft survival probabilities for live donor grafts were 88%, 83%, 81% and 76% at years 1–4 post transplantation, respectively. The 1st through 4th year graft survival probabilities for cadaver grafts were 74%, 68%, 63% and 58%, respectively. The five most common causes of pediatric end-stage renal disease have remained as: hypoplastic-dysplastic kidney, obstructive uropathy, focal segmental glomerulosclerosis, reflux nephropathy and systemic immunological diseases throughout the 5 years of this study. There has been a decrease in children 2 years of age or less undergoing transplant surgery. On average, 50% of graft failures were due to the various forms of rejection. Vascular thrombosis (14%) and recurrence of primary renal disease (7%) were the next most frequently encountered causes of graft failure. Poor linear growth was identified as a problem affecting the majority of children both before and after transplantation. Post transplant linear growth was best among recipients less than 6 years of age at transplantation and recipients of all ages who received alternate-day prednisone. A total of 16 malignancies were reported during the 5 years of study. A total of 105 deaths were reported, with infection (41%) the most common primary cause of death. The 2-year patient survival probabilities were 95.5% and 93% for recipients of live donor and cadaver grafts, respectively.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric nephrology 9 (1995), S. 669-670 
    ISSN: 1432-198X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-198X
    Keywords: Renal transplantation ; Recurrent disease ; Rejection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The data base of the North American Pediatric Renal Transplant Cooperative Study (NAPRTCS) was used to examine the effect of primary diagnosis on the outcome of renal transplantation in children. The relative risk of graft failure for eight diagnostic groups was determined, with patients with congenital and structural anomalies of the urinary tract serving as the reference group. Covariate analysis was used to control for the effects of age, race and transfusion history in recipients of living-related donor kidneys, and for age, donor age, antilymphocyte prophylaxis, prior transplantation, prior dialysis and cold ischemia time in recipients of cadaver kidneys. In recipients of living-related donor kidneys, the lowest graft failure rates were associated with the diagnoses of cystinosis, familial nephritis and hemolytic uremic syndrome (HUS), while the highest failure rates were observed in patients with a primary diagnosis of congenital nephrotic syndrome (CNS) or focal segmental glomerulosclerosis (FSGS). In cadaver allograft recipients, the lowest graft failure rates were associated with primary diagnoses of glomerulonephritis, congenital/structural disease and cystinosis, while patients with FSGS, HUS and CNS had the highest graft failure rates. This study suggests that patients with a primary diagnosis of cystinosis have superior outcomes, while the diagnoses of FSGS and CNS carry with them the highest risks of graft failure.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric nephrology 9 (1995), S. S1 
    ISSN: 1432-198X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-198X
    Keywords: Hypertension in children ; Renal transplantation ; Prevalence of hypertension ; North American Pediatric Renal Transplant Cooperative Study ; Multicenter study ; Antihypertensive therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Hypertension is common in children after renal transplantation and is associated with multiple factors. Data regarding the prevalence of post-transplant hypertension and the relationship between immunosuppressive drugs and the presistence of hypertension in a large population of North American children have not been available. This study was designed by the North American Pediatric Renal Transplant Cooperative Study to evaluate in a large diverse multicenter population of children the prevalence of hypertension post transplantation, the type of antihypertensive medication used to treat this hypertension and to determinc the relationship between the blood pressure control and the immunosuppressive therapy. Analysis of 277 patients showed the following: (1) 70% of recipients required antihypertensive medications 1 month post transplant compared with 48% pre transplant; the incidence decreased to 59% at 24 months; (2) the majority of children received multiple drug therpay to control blood pressure; (3) hypertension can be controlled effectively despite inherent etiological factors, such as allograft source, prior hypertension and immunosuppressive therapy.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-198X
    Keywords: Key words: Renal transplant ; Peritoneal dialysis ; Hemodialysis ; Chronic renal insufficiency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. The 1995 Annual Report of the North American Pediatric Renal Transplant Cooperative Study summarizes data voluntarily collected from 123 centers on 5,197 children and adolescents grouped into three cohorts: (1) patients who received renal transplants on or after 1 January 1987 (n = 3,066), (2) patients who were maintained on peritoneal dialysis (PD) or hemodialysis (HD) on or after 1 January 1992 (n = 1,488), and (3) patients treated for chronic renal insufficiency (CRI) on or after 1 January 1994 (n = 643). The transplant and dialysis information update previous registry data whereas the CRI information reflects 1st-year registry data. Three-year graft survival rates were 83% and 66% for living donor grafts and cadaver donor (CD) grafts, respectively. Triple drug maintenance therapy with prednisone, cyclosporine, and azathioprine was used by 〉70% of all transplant recipients through 5 years of follow-up. The 2-year CD survival has steadily improved from 65% in 1987 to 82% in 1992. Fifty malignancies have been reported, the majority of which are lymphoproliferative disorders. The 2-year patient survival posttransplantation is 95%. Mortality rates for the youngest patients have drastically improved over the past 2 years. Approximately two-thirds of patients in the dialysis cohort are maintained on PD; automated PD remains the preferred modality. Overall, the peritonitis rate is one infection every 13.3 patient months, the frequency of infection being greatest in the youngest patients. Whereas the primary reason for dialysis modality termination is transplantation, approximately 40% of the entire dialysis cohort (PD and HD) were not considered active transplant candidates. Baseline CRI data revealed the most common primary diagnoses to be obstructive uropathy (24%) and aplastic/hypoplastic/dysplastic kidneys (19%). The standardized height deficit in the CRI cohort was greatest in the youngest patients and those with the most impaired renal function.
    Type of Medium: Electronic Resource
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