ABSTRACT. Objective. The ItalKid Project is a prospective, population-based registry that was started in 1990 with the aim of assessing the epidemiology of childhood chronic renal failure (CRF), describing the natural history of the disease, and identifying factors that influence its course. This article reports the epidemiologic results.Methods. Prevalent and incident cases of CRF in children and adolescents were identified throughout Italy (total population base: 16.8 million children) by regularly asking all of the pediatric hospitals and adult nephrology units potentially involved in caring for children with kidney disease to report all cases that meet the inclusion criteria and then to update the clinical information regarding all previously reported patients on an annual basis. The inclusion criteria were 1) creatinine clearance (Ccr; according to Schwartz's formula) <75 mL/min/ 1.73m 2 bsa (predialysis) and 2) an age of <20 years at the time of registration.Results. By December 31, 2000, 1197 patients (803 boys) had been registered. The mean incidence was 12.1 cases per million (range: 8.8 -13.9), and the (point) prevalence was 74.7 per million of the age-related population. The mean age at registration was 6.9 ؎ 5.4 years, and the mean Ccr was 41.7 ؎ 20.5 mL/min/1.73 m 2 . The leading causes of CRF were hypodysplasia associated with urinary tract malformations (53.6%) and isolated hypodysplasia (13.9%), whereas glomerular disease accounted for as few as 6.8%. Hypodysplasia associated with primary vesicoureteral reflux (VUR) alone was responsible for as many as 25.8% of the cases, thus being the leading single cause with a female-to-male ratio of 1:3.2. The diagnosis of VUR was established early in life at an overall median age of 3 months (range: 0 -180). However, the diagnosis was made significantly later among girls, whose median age at diagnosis was 9 months (range: 0 -156; 95% confidence interval: 21.2-49.3) as against 2 months among boys (range: 0 -180; 95% confidence interval: 10.9 -21.2). As many as 23.6% of the registered patients had at least 1 severe associated disease (excluding urological abnormalities). A steep decline in renal survival occurred during puberty and early postpuberty, leading almost 70% of the patients to end-stage renal failure by the age of 20 years. When the population was subdivided on the basis of Ccr at the time of registration, the probability of kidney survival at 20 years of age was significantly different, being 63% in patients with mild renal failure (Ccr 51-75 mL/min), 30% in those with moderate renal failure (Ccr 25-50 mL/min), and 3% in those with severe renal failure (Ccr <25 mL/min). The incidence of renal replacement therapy was 7.3/y/100 patients, and the case-fatality rate on conservative treatment was 1.41%.Conclusions. This study provides important and recent epidemiologic information concerning CRF in children and adolescents: a mean annual incidence of 12.1 new patients per million of the age-related population with a very high proportion (57.6%) of hypo...

Liver transplant may definitely cure aHUS and represents an option for patients with suboptimal response to eculizumab.

Neonatal sepsis due to E. coli is often complicated by multiple organ failure (MOF) and a high mortality risk. We report the case of a term newborn discharged in good condition who suddenly fell into septic shock after 11 days and required immediate resuscitation, volume expansion and a high-dosage amine infusion. Extremely severe metabolic acidosis, disseminated intravascular coagulation (DIC) with diffuse bleeding, and unstable hemodynamic status with oliguria turned into strict anuria, and the patient became anuric. The presence of DIC, with gastric and intestinal bleeding, rendered peritoneal dialysis impossible. Continuous renal replacement therapy (CRRT) was started with the new dialysis machine CARPEDIEM® (Cardio-Renal Pediatric Dialysis Emergency Machine), available on a trial-basis in our center, after the surgical placement of jugular double-lumen central venous catheters. A ‘ready to use' neonatal kit with a low-priming volume of the extracorporeal circuit allowed a prompt hemofiltration start. The filtration CRRT was continuously performed for 48 h, then intermittently (12 h/day) for 2 more days and interrupted on day 5 for diuresis reprisal. Acute kidney injury and multi-organ failure resolved after 5 days. The child survived without neurological damage, with a normal renal function and a normal development at 9 months follow-up. In conclusion, a prompt CRRT start with this specifically designed neonatal device allowed a progressive stabilization of hemodynamics, a better control of acidosis, a reduction of amine requirement, a gradual control of fluid overload and a rapid improvement of MOF, DIC as well as a resolution of the acute kidney injury. The device also allowed the extension of CRRT in the neonatal age.

The clinical picture of acetate intolerance strictly mimics the nitric oxide (NO) effect, including smooth muscle relaxation and extreme vasodilation. Because acetate induces production of cAMP, which is a powerful stimulus of NO synthase (NOS), we evaluated the effect of different dialysate solutions with and without acetate on NOS activity in endothelial cells (EC). NOS activity of EC, evaluated as H3-citrulline produced from H3-arginine, was modulated by the dialysate composition (e.g., 38 mmol/L acetate produced an increase of 3.2 +/- 0.39-fold compared with basal values (P < 0.0005), and the small amount of acetate (4 mmol/L) in 35 mmol/L bicarbonate solution increased the NOS activity by 2 +/- 0.49-fold (P < 0.05). Conversely, the acetate-free solution produced no effect on NOS activity. The mRNA encoding for inducible NOS was highly expressed in EC incubated with acetate buffer and also with acetate in bicarbonate dialysis buffer. The EC proliferative index was depressed by acetate (P < 0.0005), and tumor necrosis factor synthesis was increased (P < 0.0005) compared with acetate-free buffer. This study suggests that dialytic "acetate intolerance" can be induced by the activation, through cAMP and tumor necrosis factor release, of NOS. The small amount of acetate in bicarbonate dialysate, although capable of inducing in vitro NOS activation, is likely to be rapidly metabolized, whereas the large amounts of this anion in acetate fluids overwhelm metabolism by the liver. Acetate-free dialysate is the only solution that provides an acceptable level of biocompatibility both in vivo and in vitro.

Severe urea cycle defects (UCD), organic acidemias (OA) and maple syrup urine disease (MSUD) are life-threatening disorders presenting in the first days of life. Renal replacement therapy (RRT) is an emergency option in affected newborns, mostly performed as ultima ratio. We report our 10-year experience using emergency RRT in newborns with UCD, OA and MSUD. Twelve newborns (eight with UCD, two with methylmalonic acidemia and two with MSUD) underwent emergency RRT. The overall survival rate to RRT was 58.3%. Hyperammonemic newborns required earlier RRT with respect to MSUD patients (75 (65-102) vs 301 (192-410) h of life, P < 0.01). Hyperammonemic neonates surviving (n = 5) and non-surviving (n = 5) the acute neonatal decompensation showed similar birth weight (P = 0.690), duration of intubation (P = 0.917), ammonia at onset (P = 0.916) and at the start of RRT (P = 0.426), age at RRT (P = 0.999) and duration of coma before RRT (P = 0.691). Remarkably, all survivors quickly responded to RRT, with ammonia concentration less than 300 μmol/L after 8 h of treatment. One patient with UCD successfully treated by neonatal RRT died at 4 months of life because of sepsis. All patients with MSUD had normalized leucine levels after 12 h of RRT, surviving the acute neonatal decompenstation. All long-term survivors (five liver transplanted, one waiting for liver transplantation) currently show normal or near-normal neurological development (48 ± 39 months of age). Early response to RRT was associated with survival irrespective of pre-treatment picture. RRT can be considered even in huge neonatal metabolic decompensations. Early liver transplantation may be an option for select patients.