Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2018-03-26T12:09:17Z No. of bitstreams: 2 Tese - Saura Nayane de Souza - 2017.pdf: 4815483 bytes, checksum: a9d3c576d6699488befc8fdde284c795 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2018-03-26T12:11:02Z (GMT) No. of bitstreams: 2 Tese - Saura Nayane de Souza - 2017.pdf: 4815483 bytes, checksum: a9d3c576d6699488befc8fdde284c795 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2018-03-26T12:11:02Z (GMT). No. of bitstreams: 2 Tese - Saura Nayane de Souza - 2017.pdf: 4815483 bytes, checksum: a9d3c576d6699488befc8fdde284c795 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-03-06 / The goal of the study was to evaluate cystatin C and other biomarkers as diagnostic tools in canine renal disease. The project was divided in two studies. In the first study renal injury was induced in 6 animals by subcutaneous administration of gentamicin (30mg/kg) for 10 days, and 6 animals were kept as controls. Animals were evaluated for 45 days by the following clinical and laboratorial parameters: physical examination; hemogram and fibrinogen levels; measurement of creatinine, urea, total proteins, albumin, phosphorus, calcium, sodium, potassium, cholesterol levels (biochemical analysis); serum protein electrophoresis; urine sodium, potassium, gamma glutamyl transferase and alkaline phosphatase levels; urinalysis; urine protein / creatinine ratio; hemogasometry and non-invasive systemic arterial pressure. The second study evaluated the level of cystatin C in 58 dogs suffering from different stages (2-4) of chronical renal disease, as defined by International Renal Interest Society (IRIS) guidelines. Six animals presenting acute renal injury induced bygentamicin treatment were also evaluated (for 20 time points upon injury). The results indicated that changes in urine gamma glutamyl transferase and fractional excretion of sodium and potassium were the earliest parameters indicating acute renal injury, even when compared to most common renal disease biomarkers: urea and creatinine. Cystatin C measurement, on the other hand, showed little value for early detection of chronic kidney disease and acute kidney injury in dogs. / O objetivo deste estudo foi avaliar a aplicação dos biomarcadores, em especial da cistatina C, no diagnóstico da doença renal em cães e compreendeu duas etapas. Uma fase constou da avaliação de 12 cães, sendo seis pertencentes ao grupo controle e seis cães pertencentes ao grupo experimental que foram submetidos a um protocolo de indução de injúria renal com 30 mg/kg ao dia de gentamicina, via subcutânea, durante 10 dias. Os cães foram avaliados durante 45 dias por meio de: exame clínico; hemograma e fibrinogênio; bioquímica sérica (ureia, creatinina, proteínas totais, albumina, fósforo, cálcio, sódio, potássio, colesterol e eletroforese das proteínas séricas); bioquímica urinária (sódio, potássio, gama glutamil transferase e fosfatase alcalina); urinálise; determinação da razão proteína/creatinina urinária; hemogasometria e pressão arterial sistólica não- invasiva. A outra fase constou da mensuração da cistatina C sérica em 58 cães com doença renal crônica divididos nos estádios 2, 3 e 4 da IRIS (International Renal Interest Society) e em seis cães com injúria renal aguda induzida por gentamicina, avaliados durante 20 momentos após o início da injúria. Os resultados demonstraram que a enzima gama glutamil transferase urinária e a excreção fracionada de sódio e potássio foram mais precoces em detectar a injúria renal aguda em cães do que outros marcadores mais utilizados na rotina clínica como a creatinina e a ureia. A cistatina C sérica não foi eficiente em detectar de forma precoce a doença renal crônica em cães nos estádios iniciais e a injúria renal aguda, possuindo uma baixa aplicabilidade neste estudo.

Postoperative atrial fibrillation (AF) after cardiac surgery with cardiopulmonary bypass (CPB) remains unresolved problem. Some authors noticed that there were changes in electrolyte balance after coronary artery bypass grafting (CABG) surgery with CPB. The changes in serum magnesium level and their relation with the rate of postoperative AF are usually analyzed in scientific publications. The aim of the study has been to estimate the relationship between the rate of postoperative AF and the changes in serum electrolyte concentration and their urinary excretion after CABG surgery with CPB. The goals: 1) To estimate the rate and the character of postoperative AF and its influence on haemodynamics after CABG surgery. 2) To estimate changes in serum K+, Na+, Mg++, Ca++, Cl–, P– concentration and compare them between the patients who received, and who did not receive magnesium sulphate supplementation during the surgery. 3)To estimate changes of urinary excretion of K+, Na+, Mg++, Ca++, Cl–, P– and compare them between the patients who received, and who did not receive magnesium sulphate supplementation during the surgery. 3) To evaluate the effects of intraoperatively infused magnesium sulphate on the rate of postoperative AF in the early postoperative period. In our study the rate of postoperative AF was 27.4 %. AF in 91.3 % of cases was tachyarrhythmic, but haemodynamic remained stabile. Serum Mg++ level was > 1.05 mmol/l during the suregry in all patients. The infusion of... [to full text]