[Blood hypertension in children. Guideliness for diagnosis and treatment. Part 2 Pediatric Nephrology Branch, Chilean Pediatric Society].

Hypertension (HTN) in children and adolescents is an important pathology, of, guarded prognosis, associated with modifiable and non-modifiable factors. The estimated prevalence is around 3.5% which increases progressively with age.

[Blood hypertension in childrens. Guideliness for diagnosis and treatment. Part 1. Pediatric Nephrology Branch, Chilean Pediatric Society].

Hypertension (HT) in children and adolescents is an important pathology, associated with modi fiable and non-modifiable factors. In the pediatric, the prevalence of HT is around 3.5%, and it in creases progressively with age.

[New concepts about hemolytic-uremic syndrome].

According to the heterogenous nature of hemolytic uremic syndrome in relation to the etiology, pathophysiology, treatment and diagnosis, we wish to draw attention to the main characteristics about its epidemiological clinical and immunopathological aspects. The HUS's distributes through all the world, but in Argentina, North of Europe, South Africa and west of USA the incidence is higher than the rest of the countries. The immunopathological studies shows thrombotic angiopathic lesion, consisting in generalized alteration of the capillary and arteriolar epithelium.

[Blood group P1 and its relation to renal cicatrix in patients with urinary infection].

Possible relationships between renal scars and P blood group have been recently emphasized. Urinary tract infections, an important factor in the production of renal scar, are mainly caused by specific types of E. coli, which has the ability to adhere through fimbriae, to receptors of the urinary tract epithelium that are structurally related to antigens detected in people with blood group P1.

Surgical treatment of complete renal artery occlusion in pediatric patients.

Two children, 8 and 11 years old, presented with severe hypertension secondary to unilateral and bilateral total occlusion of the renal arteries, respectively. The 11-year-old developed sudden anuria requiring hemodialysis. Successful surgical reconstruction allowed recovery of renal function and normal blood pressure in both patients.