Intravascular Hemolysis of Red Blood Cells in the Development of Organ Dysfunctions in Critical Conditions
نویسنده
چکیده
куляторного русла, лежащие в основе органных диcфункций при критических состояниях, во многом связаны с вну: трисосудистым гемолизом эритроцитов, выходом свободного гемоглобина и его последующим катаболизмом до ио: нов Fe. Предполагается, что в условиях массивного внутрисосудистого гемолиза формируется недостаточность системы связывания, транспорта и утилизации микроэлемента. Избыток ионов Fe, обладающих высокой каталити: ческой активностью, может оказывать прямое повреждающее действие на эндотелий капилляров с развитием «ка: пиллярной утечки». Большое количество ионов Fe в условиях гипоксии, ацидоза и реперфузии исключает из реак: ций нейтрализации первичных активных радикалов основной субстрат для эндогенных антиоксидантов — перекись водорода и супероксидный радикал, что способствует активации процессов перекисного окисления липидов и син: тезу более токсичных вторичных радикалов. Ключевые слова: микроциркуляция, органные диcфункции, гемолиз эритроцитов, свободный гемоглобин, ионы Fe, реперфузия.
منابع مشابه
Determination of hemolysis, osmotic fragility and fluorescence anisotropy on irradiated red blood cells as a function of kV of medical diagnostic X-rays
Background: People occasionally undergo medical diagnostic X-ray examinations and expose their red blood cells to radiation. Radiation that is generated from medical diagnostic X-ray machines is widely used in medical diagnoses. One of the important parameters is kilo-voltage (kV) that is applied across the X-ray tube in medical diagnostic X-ray machines. Kilo-voltage influences the radiation d...
متن کاملIntravascular Hemolysis Due to Glucose‐6‐Phosphate Dehydrogenase Deficiency in a Patient with Aluminium Phosphide Poisoning
Aluminium Phosphide poisoning and glucose‐6‐phosphate dehydrogenase deficiency are two commonly seen clinical presentations in Iran. However, hemolysis associated with Aluminium Phosphide poisoning is very rare. We report a case of concurrent Aluminium Phosphide poisoning and glucose‐6‐phosphate dehydrogenase deficiency in a 24 year old man presenting with intravascular hemolysis. Key words...
متن کاملPrevalence of Alloantibodies and Autoantibodies in Transfusion Dependent Thalassemia Patients
Background: The development of anti-red blood cell alloantibodies remains a major problem in transfusion of blood in thalassemia major patients. Also, Autoantibodies can result in clinical hemolysis and difficulty in cross-matching blood. We studied the frequency of red blood cell alloimmunization and autoimmunization among thalassemia patients who received regular transfusions in Ilam province...
متن کاملEffect of Thyroid Dysfunctions on Blood Cell Count and Red Blood Cell Indice
Abstract Background Thyroid hormones have a crucial role in metabolism and proliferation of blood cells. Thyroid dysfunction induces different effects on blood cells such as anemia, erythrocytosis leukopenia, thrombocytopenia, and in rare cases causes’ pancytopenia. It also alter RBC indices include MCV, MCH, MCHC and RDW. Thus this study attempted to evaluate effect of hypo & hyperthyroi...
متن کاملThe Alterations of Plasma Iipid Peroxidation and erythrocyte Superoxide Dismutase and Glutathione Peroxidase Enzyme Activities During Storage of Blood
Abstract Background and objective: Exposure of red blood cells to oxygen radicals can induce Lipid proxidation, hemoglobin damage and hemolysis of erythrocyte .The present study was designed to determine the alteration of plasma lipid peroxidation and erythrocyte Superoxide Dismutase and Glutathione Peroxidase enzyme activities in stored blood and to find out the quantitative alterations and th...
متن کامل