Influência do tempo e da temperatura de estocagem de amostras de sangue nas variáveis hematológicas de cães portadores de enfermidade renal crônica
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Data
2011-06-22
Autores
Dorigam, Jordano De Paula [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
O hemograma, amplamente utilizado na medicina veterinária por apresentar praticidade e baixo custo, é rotineiramente solicitado para o diagnóstico de diversas enfermidades que acometem os animais de companhia, bem como para o acompanhamento destes pacientes. Faltam estudos que reflitam a realidade que os laboratórios enfrentam: as amostras recebidas, pertencentes a animais enfermos, nem sempre podem ser processadas na hora, podendo ficar armazenada por horas. Paralelamente a essa situação, a doença renal crônica é a afecção renal mais comum em cães e gatos, que acabam necessitando de acompanhamento clínico e, para tanto, o hemograma é uma das ferramentas utilizadas. Além disso, a DRC possui consequências diretas no sangue do paciente. Diante deste problema, realizou-se este ensaio com o fito de analisar a estabilidade de alguns dos parâmetros do hemograma, de amostras retiradas de pacientes em diferentes estágios de doença renal crônica, e estocadas a diferentes temperaturas e tempos. Foram utilizados 24 animais da rotina clínica. O sangue foi coletado, processado e então armazenado para posteriores contagens de hemácias, leucócitos e plaquetas, assim como a determinação do volume globular, concentração de hemoglobina, volume corposcular médio, hemoglobina corpuscular média, concentração de hemoglobina corpuscular média, contagem diferencial de leucócitos em esfregaços sanguineos e contagem de reticulócitos. Desta forma, o sangue foi distribuido em duas frações, armazenadas a 4°C e a 25°C e analisadas logo após a coleta, e então passadas quatro, oito, vinte e quatro, quarenta e oito e setenta e duas horas. Os resultados corroboraram com experimentos anteriores realizados com cães hígidos. Foi possível observar que, apesar do sangue urêmico provocar menor viabilidade celular in vivo, os resultados não foram...
The complete blood count, widely used in veterinary medicine by presenting practicality and low cost, is routinely requested for diagnosis of various diseases that affect pets, as well as monitoring these patients. There is a lack of studies that reflect the reality that laboratories face: the samples, deriving from sick animals, can't always be processed as they are received, and may be stored for hours. Parallel to this, chronic kidney disease is the most common kidney illness in dogs and cats that end up needing clinical follow-up and, therefore, the CBC is one of the tools used. In addition, the CKD has direct consequences on the patient's blood. Faced with this problem, this test was carried out with the aim of analyzing the stability of some of the parameters of the CBC, in samples taken from patients at different stages of chronic kidney disease, and stored at different temperatures and times. 24 animals from the clinical routine were used. Blood was collected, processed and then stored for later counts of red blood cells, white cells and platelets, as well as packed cell volume, hemoglobin concentration, mean corpuscular volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, leukocyte count in blood smears, and reticulocyte count. Thus, the blood was distributed in two fractions, stored at 4°C and 25°C and analyzed immediately after collection, and then after four, eight, twenty-four, forty-eight and seventy-two hours. The results corroborate previous experiments carried out on healthy dogs. It was observed that despite that uremic blood lead to lower cell viability in vivo, the results were not significantly different from works carried out on healthy animals, thereby remaining the ideal time of storage to carry out laboratory tests up to eight hours at room temperature (25°C) and up to forty eight hours under refrigeration temperature (4°C)
The complete blood count, widely used in veterinary medicine by presenting practicality and low cost, is routinely requested for diagnosis of various diseases that affect pets, as well as monitoring these patients. There is a lack of studies that reflect the reality that laboratories face: the samples, deriving from sick animals, can't always be processed as they are received, and may be stored for hours. Parallel to this, chronic kidney disease is the most common kidney illness in dogs and cats that end up needing clinical follow-up and, therefore, the CBC is one of the tools used. In addition, the CKD has direct consequences on the patient's blood. Faced with this problem, this test was carried out with the aim of analyzing the stability of some of the parameters of the CBC, in samples taken from patients at different stages of chronic kidney disease, and stored at different temperatures and times. 24 animals from the clinical routine were used. Blood was collected, processed and then stored for later counts of red blood cells, white cells and platelets, as well as packed cell volume, hemoglobin concentration, mean corpuscular volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, leukocyte count in blood smears, and reticulocyte count. Thus, the blood was distributed in two fractions, stored at 4°C and 25°C and analyzed immediately after collection, and then after four, eight, twenty-four, forty-eight and seventy-two hours. The results corroborate previous experiments carried out on healthy dogs. It was observed that despite that uremic blood lead to lower cell viability in vivo, the results were not significantly different from works carried out on healthy animals, thereby remaining the ideal time of storage to carry out laboratory tests up to eight hours at room temperature (25°C) and up to forty eight hours under refrigeration temperature (4°C)
Descrição
Palavras-chave
Cão, Conservação, Doença renal crônica, Hemograma, Complete blood count, Conservation, Dog, Temperature, Cronic kidney disease
Como citar
DORIGAM, Jordano De Paula. Influência do tempo e da temperatura de estocagem de amostras de sangue nas variáveis hematológicas de cães portadores de enfermidade renal crônica. 2011. xi, 40 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, 2011.