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1.
Urol Res ; 34(1): 8-11, 2006 Feb.
Article in English | MEDLINE | ID: mdl-16425020

ABSTRACT

Urolithiasis is the third most common pathological disease afflicting the urinary tract, and usually occurs between the third and fourth decades of an individual's life. Epidemiological studies about this condition are lacking in our country. In 1998, we performed an epidemiological, cross-sectional study of the prevalence of urolithiasis in a sample of 1,086 subjects, which included men and women of all ages, selected from the general population of the city of Buenos Aires. The method used to gather basic information was an auto administered questionnaire about the present or past history of urolithiasis that was handled at the dwelling by a trained volunteer. We found a 3.96% lifetime prevalence of urolithiasis in the general population of Buenos Aires. The rate was slightly higher in men (4.35%) than in women (3.62%), with a male to female ratio of 1.19:1. No case of urolithiasis was found in subjects under the age of 20. In subjects over 19 years, the prevalence rate of the disease was 5.14%; 5.98% for men (CI 3.41-8.55%) and 4.49% for women (CI 2.61-6.37%). Prevalence increased with age, ranging from 2.75% in the 20-39 age group to 7.79% in those >or=60 years. The life time prevalence rate of urolithiasis observed in Buenos Aires is similar to that reported in a few other studies performed among males and females in the general population of USA and Europe. Prevalence of urolithiasis increases with age both in men and in women.


Subject(s)
Urban Population/statistics & numerical data , Urolithiasis/epidemiology , Adult , Age Distribution , Argentina/epidemiology , Cross-Sectional Studies , Female , Humans , Male , Middle Aged , Prevalence , Risk Factors , Sex Distribution , Surveys and Questionnaires
2.
Int J Dermatol ; 44(2): 101-6, 2005 Feb.
Article in English | MEDLINE | ID: mdl-15689205

ABSTRACT

BACKGROUND: Calcific uremic arteriolopathy is a rare and serious disorder characterized by systemic medial calcification of the arteries and tissue ischemia. Most often it is found in patients with chronic renal failure on dialysis and in renal transplant recipients with secondary hyperparathyroidism. METHODS: We report six patients with end-stage renal disease [five on hemodialysis (one with a nonfunctioning renal graft) and one on peritoneal dialysis] who developed painful livedo reticularis and skin necrosis of the limbs. All had secondary hyperparathyroidism and elevated calcium-phosphorus product. Our patients presented with the following clinical features: white race (six patients), hypoalbuminemia (three patients), diabetes (one patient), and obesity (four patients). RESULTS: Subtotal parathyroidectomy was performed in three cases. Despite this procedure, two patients died; one patient survived and his lesions healed. One patient was treated with aggressive wound care and hemodialysis (with low dialysate calcium concentration and Renagel phosphorus binders) and one patient received only local wound care, both with improvement of their lesions. In one case, no therapy was performed because the patient died immediately after diagnosis. CONCLUSIONS: The three patients who survived (Cases 4, 5 and 6) had distal lesions, normal serum albumin, and an early diagnosis. There was a relationship between the outcome of the patients and these factors, rather than the type of treatment received.


Subject(s)
Calciphylaxis/pathology , Kidney Failure, Chronic/pathology , Skin Diseases, Vascular/pathology , Skin/pathology , Adult , Aged , Calciphylaxis/complications , Humans , Kidney Failure, Chronic/complications , Kidney Failure, Chronic/therapy , Male , Middle Aged , Necrosis/etiology , Necrosis/pathology , Renal Dialysis , Skin Diseases, Vascular/etiology
3.
Rev. nefrol. diálisis transpl ; (34): 3-13, set. 1993. ilus, tab
Article in Spanish | BINACIS | ID: bin-25059

ABSTRACT

La CaMgATPasa es una enzima involucrada en los movimientos de calcio a través de las membranas biológicas. Nosotros testeamos la actividad de dicha enzima en membranas de eritrocitos de 17 pacientes hipercalciúricos y la comparamos con 8 controles sanos. Los pacientes con hipercalciuria tuvieron una actividad de CaMgATPasa que fue significativamente superior a los controles (18,02 2,83 vs 14,69 1,78 nM . mg-1 p<0,01). La excreción de urinaria de calcio en 24 hs (UCa.V) estuvo directa y significativamente relacionada con la actividad de la enzima (UCa.V: 36,31 x CaMgATPasa - 371,08 r:0,65 p<0,05) sólo en pacientes con hipercalciuria. Cuando agrupamos los pacientes acorde al diagnóstico fisiopatológico en hipercalciuria absortiva (HCA) e hipercalciuria renal (HCRT) encontramos que la actividad enzimática estuvo sólo significativamente elevada en aquellos portadores de HCA al compararlos con los controles (19,17 3,49 vs 14,68 1,79 nM . mg-1 .min-1 p<0,025).No encontramos diferencias estadísticamente significativas entre HCRT y controles (16,83 1,99nM . mg-1 . min-1; p:NS) y en HCRT vs HCA (p<0,14). Concluimos que las alteraciones en el transporte de calcio en la hipercalciuria dependería de anormalidades en la actividad de la CaMgATPasa


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Erythrocyte Membrane/enzymology , Calcium/urine , Urinary Calculi/physiopathology , Calcium-Transporting ATPases/diagnosis , Ca(2+) Mg(2+)-ATPase/diagnosis , Calcium Metabolism Disorders/enzymology , Urinary Calculi/enzymology , Urinary Calculi/etiology , Calcium/physiology , Calcium/blood , Calcium Metabolism Disorders/classification , Calcium Metabolism Disorders/etiology , Calcium-Transporting ATPases/physiology , Calcium-Transporting ATPases/blood , Ca(2+) Mg(2+)-ATPase/physiology
4.
Rev. nefrol. diálisis transpl ; (34): 3-13, set. 1993. ilus, tab
Article in Spanish | BINACIS | ID: bin-123932

ABSTRACT

La CaMgATPasa es una enzima involucrada en los movimientos de calcio a través de las membranas biológicas. Nosotros testeamos la actividad de dicha enzima en membranas de eritrocitos de 17 pacientes hipercalciúricos y la comparamos con 8 controles sanos. Los pacientes con hipercalciuria tuvieron una actividad de CaMgATPasa que fue significativamente superior a los controles (18,02 2,83 vs 14,69 1,78 nM . mg-1 p<0,01). La excreción de urinaria de calcio en 24 hs (UCa.V) estuvo directa y significativamente relacionada con la actividad de la enzima (UCa.V: 36,31 x CaMgATPasa - 371,08 r:0,65 p<0,05) sólo en pacientes con hipercalciuria. Cuando agrupamos los pacientes acorde al diagnóstico fisiopatológico en hipercalciuria absortiva (HCA) e hipercalciuria renal (HCRT) encontramos que la actividad enzimática estuvo sólo significativamente elevada en aquellos portadores de HCA al compararlos con los controles (19,17 3,49 vs 14,68 1,79 nM . mg-1 .min-1 p<0,025).No encontramos diferencias estadísticamente significativas entre HCRT y controles (16,83 1,99nM . mg-1 . min-1; p:NS) y en HCRT vs HCA (p<0,14). Concluimos que las alteraciones en el transporte de calcio en la hipercalciuria dependería de anormalidades en la actividad de la CaMgATPasa


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Erythrocyte Membrane/enzymology , Calcium/urine , Urinary Calculi/physiopathology , Calcium-Transporting ATPases/diagnosis , Ca(2+) Mg(2+)-ATPase/diagnosis , Calcium Metabolism Disorders/enzymology , Urinary Calculi/enzymology , Urinary Calculi/etiology , Calcium/physiology , Calcium/blood , Calcium Metabolism Disorders/classification , Calcium Metabolism Disorders/etiology , Calcium-Transporting ATPases/physiology , Calcium-Transporting ATPases/blood , Ca(2+) Mg(2+)-ATPase/physiology
5.
Rev. nefrol. diál. traspl ; (34): 3-13, set. 1993. ilus, tab
Article in Spanish | LILACS | ID: lil-129844

ABSTRACT

La CaMgATPasa es una enzima involucrada en los movimientos de calcio a través de las membranas biológicas. Nosotros testeamos la actividad de dicha enzima en membranas de eritrocitos de 17 pacientes hipercalciúricos y la comparamos con 8 controles sanos. Los pacientes con hipercalciuria tuvieron una actividad de CaMgATPasa que fue significativamente superior a los controles (18,02 2,83 vs 14,69 1,78 nM . mg-1 p<0,01). La excreción de urinaria de calcio en 24 hs (UCa.V) estuvo directa y significativamente relacionada con la actividad de la enzima (UCa.V: 36,31 x CaMgATPasa - 371,08 r:0,65 p<0,05) sólo en pacientes con hipercalciuria. Cuando agrupamos los pacientes acorde al diagnóstico fisiopatológico en hipercalciuria absortiva (HCA) e hipercalciuria renal (HCRT) encontramos que la actividad enzimática estuvo sólo significativamente elevada en aquellos portadores de HCA al compararlos con los controles (19,17 3,49 vs 14,68 1,79 nM . mg-1 .min-1 p<0,025).No encontramos diferencias estadísticamente significativas entre HCRT y controles (16,83 1,99nM . mg-1 . min-1; p:NS) y en HCRT vs HCA (p<0,14). Concluimos que las alteraciones en el transporte de calcio en la hipercalciuria dependería de anormalidades en la actividad de la CaMgATPasa


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Calcium Metabolism Disorders/enzymology , Calcium/urine , Ca(2+) Mg(2+)-ATPase , Calcium-Transporting ATPases , Urinary Calculi/physiopathology , Erythrocyte Membrane/enzymology , Calcium Metabolism Disorders/classification , Calcium Metabolism Disorders/etiology , Calcium/physiology , Calcium/blood , Ca(2+) Mg(2+)-ATPase/physiology , Calcium-Transporting ATPases/physiology , Calcium-Transporting ATPases/blood , Urinary Calculi/enzymology , Urinary Calculi/etiology
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