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Article in Chinese | WPRIM | ID: wpr-939706


OBJECTIVE@#To investigate the anti-oxidative effect of ethyl pyruvate (EP) and taurine (TAU) on the quality of red blood cells stored at 4±2 ℃, hemolysis, energy metabolism and lipid peroxidation of the red blood cells in the preservation solution were studied at different intervals.@*METHODS@#At 4±2 ℃, the deleukocyte red blood cells were stored in the citrate-phosphate-dextrosesaline-adenine-1 (CPDA-1) preservation (control group), preservation solution with EP (EP-AS), and TAU (TAU-AS) for long-term preservation. The enzyme-linked immunoassay and automatic blood cell analyzer were used to detect hemolysis and erythrocyte parameters. Adenine nucleoside triphosphate (ATP), glycerol 2,3-diphosphate (2,3-DPG) and malondialdehyde (MDA) kits were used to test the ATP, 2,3-DPG and MDA concentration.@*RESULTS@#During the preservation, the rate of red blood cell hemolysis in EP-AS and TAU-AS groups were significantly lower than that in CPDA-1 group (P<0.01). The MCV of EP-AS group was increased with the preservation time (r=0.71), while the MCV of the TAU-AS group was significantly lower than that in the other two groups (P<0.05). The concentration of ATP and MDA in EP-AS and TAU-AS groups were significantly higher than that in CPDA-1 group at the 14th day (P<0.01). The concentrations of 2,3-DPG in the EP-AS and TAU-AS groups were significantly higher than that in the CPDA-1 group from the 7th day (P<0.01).@*CONCLUSION@#EP and TAU can significantly reduce the red blood cell hemolysis rate, inhibit the lipid peroxidation level of red blood cells, and improve the energy metabolism of red blood cells during storage. The mechanism of EP and TAU may be related to their antioxidation and membrane protection effect, so as to improve the red blood cell quality and extend the preservation time.

2,3-Diphosphoglycerate/metabolism , Adenine , Adenosine Triphosphate/metabolism , Blood Preservation , Citrates/pharmacology , Erythrocytes/metabolism , Glucose/pharmacology , Hemolysis , Humans , Pyruvates , Taurine/pharmacology
Article in Chinese | WPRIM | ID: wpr-928752


OBJECTIVE@#To investigate the titer of IgG anti-A/B erythrocyte antibody in vivo of the neonate with hemolytic disease of newborn(HDN), and explore its clinical valua in evaluating the severity of HDN.@*METHODS@#300 neonates with HDN, 50 neonates with neonatal hyperbilirubinemiain and 50 healthy neonates were selected as research object and Microtubes Gel Test was used to detect the titer of IgG anti-A/B erythrocyte antibody in vivo. Their clinical data and their mothers' prenatal examination data were retrospectively analyzed. Three hemolysis tests (direct antiglobulin test, free antibody test and release test), irregular antibody screening, and the titer of IgG anti-A/B blood group antibody was determined by serological method. Red blood cells(RBC), hemoglobin(Hb), reticulocytes(Ret) and nucleated red cells were detected by hematology analyzer. Indirect bilirubin and albumin(Alb) were detected by biochemical analyzer. The relationship between the titer of IgG anti-A/B erythrocyte antibody in vivo and the severity of HDN was analyzed.@*RESULTS@#There were six serological diagnosis modes in the HDN group,the difference between modes was statistically significant (P<0.05). The antibody titer relationship between HDN neonates and pregnant women was positive correlation(r=0.8302). The highest antibody titer of release test and free antibody test were 1∶32 and 1∶2, and the difference was statistically significant(P<0.05). RBC, Hb and Alb in HDN patients were lower than those in neonatal hyperbilirubinemia patients and healthy neonates (P<0.05), and were negatively relevant with antibody titer in vivo (r=-0.8016). Bilirubin content in HDN patients were higher than those in neonatal hyperbiliru binemia patients and healthy neonates group(P<0.05), and was positively relevant with antibody titer in vivo (r=0.8731). The hospital day in HDN patients was significantly relevant with the antibody titer in vivo (r=0.8547), but not with the age, sex, weight and ABO blood types (P>0.05).@*CONCLUSION@#The detection of antibody titer in HDN patients can be used to evaluate the antibody concentration in vivo, predict the ability of antibody to induce erythrocyte hemolysis, and help to judge the serenrity and prognosis of HDN.

ABO Blood-Group System , Bilirubin , Blood Group Incompatibility , Erythroblastosis, Fetal , Erythrocytes , Female , Hematologic Diseases , Hemolysis , Humans , Immunoglobulin G , Infant, Newborn , Pregnancy , Retrospective Studies
Afr. J. Clin. Exp. Microbiol ; 23(4): 345-357, 2022.
Article in English | AIM | ID: biblio-1396410


Background: Sickle cell disease (SCD) is associated with chronic haemolysis, immuno-suppression and susceptibility to infections, which may trigger infection-associated haemolysis (IAH). SCD patients are vulnerable to anaemic effect of IAH due to vicious interaction between pre-existing 'inherited' chronic haemolysis and 'acquired' IAH. IAH in SCD manifests as febrile haemolytic crisis with clinical and laboratory features of severe anaemia or pancytopenia. Clinico-pathological perspectives of IAH in SCD are fragmented. This review presents a comprehensive but concise overview of pathogenesis, management and prevention of IAH in SCD. Methodology and results: Online literature search using search terms such as 'sickle cell disease, viral, bacterial, parasitic, fungal, infections, hyperhaemolytic crisis, haemophagocytic syndrome, severe anaemia, pancytopenia' in various combinations was done on PubMed/Medline, Google, Google-Scholar and Bing. Overall, 112 relevant publications were retrieved, which included 109 peer reviewed journal articles, 2 World Health Organization (WHO) technical reports, and 1 edited text book. A range of bacterial (Bartonella spp, Mycoplasma spp., Mycobacterium avium complex), viral (Dengue, SARS-CoV-2, Parvovirus-B19, Cytomegalovirus, Epstein-Barr virus), parasitic (Plasmodium spp., Babesia spp.), and fungal (Histoplasma spp.) infections were associated with IAH in SCD. There are two broad types of IAH in patients with SCD; infection associated extra-medullary haemolysis (IAEMH) and infection associated intra-medullary haemolysis (IAIMH). While IAEMH is associated with severe anaemia due to intravascular haemolysis caused by red cell invasion, oxidative injury, auto-antibodies, and/or pathogen-haem interaction, IAIMH is associated with haemophagocytic tri-lineage destruction of haematopoietic precursors in the bone marrow. Conclusion: Various microbial pathogens have been associated with IAH in SCD. SCD patients with fever, severe anaemia or pancytopenia should be investigated for early diagnosis and prompt treatment of IAH, which is a lifethreatening haematological emergency for which transfusion therapy alone may not suffice. Prompt and sustainable termination of IAH may require therapeutic combination of transfusion, anti-microbial chemotherapy, and immune modulation therapy. SCD patients should also receive counselling on hygiene, barrier protection against vectors, routine chemoprophylaxis for locally endemic diseases, and immunization for vaccine-preventable infections as a long-term preventive strategy against IAH.

Humans , Hemolysis , Anemia, Sickle Cell , Disease Management , Infections
Rev. bras. anal. clin ; 53(3): 245-251, 20210930. graf, tab
Article in Portuguese | LILACS | ID: biblio-1368582


Objetivo: Analisar qualitativamente o teste de fragilidade osmótica (F.O.) para amostras a fresco ou após incubação a 37°C. Métodos: Foram processadas 20 amostras de sangue periférico, coletadas em duplicata com 5mL em cada tubo com heparina, de pacientes com solicitação de F.O. como exame de rotina para processamento a fresco e após incubação por 24 horas em banho-maria a 37°C, em 13 tubos com concentrações variáveis de 0,1% a 0,9% de NaCl. Resultados: Foram analisadas 20 amostras de pacientes em sua maioria do gênero feminino 17/20 (85%), com idades entre 3 meses a 75 anos, para realização do teste de F.O. A análise qualitativa dos resultados mostrou que 9/20 (45%) amostras tiveram resultado concordante entre os testes de F.O. para amostras a fresco e após incubação a 37°C. Dos resultados discordantes, 8/11 (72,7%) resultados mostram fragilidade dos eritrócitos à hemólise nas amostras a fresco e curva normal (sem hemólise) após incubação da amostra a 37°C. Outros 3/11 (22,3%) resultados apresentaram curva normal (sem hemólise) no teste com amostra à fresco e resistência à hemólise no teste com a amostra após incubação a 37°C. Com o teste de Extato de Fisher não mostrou diferença estatística (p=0,5743) para as amostras processadas a fresco ou após incubação a 37°C. Conclusão: O teste de F.O. se mostrou mais eficiente quando a amostra testada foi analisada após incubação por 24 horas a 37°C em banho-maria, contudo não houve diferença estatística para resultados processados a fresco ou após incubação a 37°C.

Objective: Qualitatively analyze the osmotic fragility test (O.F.) for samples fresh or after incubation at 37°C. Methods: Twenty peripheral blood samples were processed, collected in duplicate with 5 ml in each tube with heparin, from patients with O.F. request. as a routine examination for fresh processing and after incubation for 24 hours in a water bath at 37°C, in 13 tubes with varying concentrations of 0.1% to 0.9% NaCl. Results: Twenty samples of patients were analyzed, mostly female, 17/20 (85%), aged between 3 months to 75 years, for the O.F. test. The qualitative analysis of the results showed that only 9/20 (45%) samples had a consistent result between the F.O. tests for fresh samples and after incubation at 37°C. From the discordant results, 8/11 (72.7%) results show fragility of erythrocytes to hemolysis in fresh samples and normal curve (without hemolysis) after sample incubation at 37o C. Other 3/11 (22.3%) results showed normal curve (without hemolysis) in the test with fresh sample and resistance to hemolysis in the test with the sample after incubation at 37o C. With the Fisher Extact test showing no statistical difference (p=0.5743) for samples processed fresh or after incubation at 37°C. Conclusion: The O.F. proved to be more efficient when the tested sample was analyzed after incubation for 24h at 37°C in a water bath, however, there was no statistical difference for results processed fresh or after incubation at 37°C.

Humans , Male , Female , Infant , Child, Preschool , Child , Adolescent , Adult , Middle Aged , Aged , Young Adult , Osmotic Fragility , Anemia, Hemolytic , Hemolysis
J. pediatr. (Rio J.) ; 97(4): 440-444, July-Aug. 2021. tab
Article in English | LILACS | ID: biblio-1287036


Abstract Objective To assess the accuracy of umbilical cord bilirubin values to predict jaundice in the first 48 h of life and neonatal infection. Method Newborn infants treated at a regional well-baby nursery born at ≥36 weeks of gestation were included in this retrospective cohort study. All infants born in a 3-year period from mothers with O blood type and/or Rh-negative were included and had the umbilical cord bilirubin levels measured. Hyperbilirubinemia in the first 48 h was defined as bilirubin levels above the phototherapy threshold. Neonatal infection was defined as any antibiotic treatment before discharge. Results A total of 1360 newborn infants were included. Two hundred and three (14.9%) newborn infants developed hyperbilirubinemia in the first 48 h of life. Hyperbilirubinemic infants had smaller birth weight, higher levels of umbilical cord bilirubin, a higher rate of infection and were more often direct antiglobulin test positive. Umbilical cord bilirubin had a sensitivity of 76.85% and a specificity of 69.58% in detecting hyperbilirubinemia in the first 48 h, with the cut-off value at 34 µmol/L. The area under the receiver operating characteristic curve was 0.80 (95% CI: 0.78-0.82). Umbilical cord bilirubin had a sensitivity of 27.03% and specificity of 91.31% in detecting perinatal infection. The area under the receiver operating characteristic (ROC) curve was 0.59 (95% CI: 0.57-0.63). Conclusions A positive correlation was found between umbilical cord bilirubin and hyperbilirubinemia in the first 48 h of life. Umbilical cord bilirubin is a poor marker for predicting neonatal infection.

Humans , Female , Infant, Newborn , Infant , Bilirubin , Hyperbilirubinemia, Neonatal/diagnosis , Predictive Value of Tests , Retrospective Studies , Fetal Blood , Hemolysis
Rev. med. vet. zoot ; 68(2): 95-104, mayo-ago. 2021. tab, graf
Article in English | LILACS-Express | LILACS, COLNAL | ID: biblio-1352096


ABSTRACT Mastitis is one of the most important illnesses in specialized dairy herds worldwide due to the effects on production and animal health. The types caused by CNS has a special importance in a production where the main pathogens are controlled. The objective of the present work is to determine the prevalence of CNS in a dairy herd in Boyaca and also quantify the effects of every species of CNS in SCC. 40 cows were selected and sampled during 6 months, CMT was performed, and results from 1 to trace were sampled. The routine bacteriological test was also performed for CNS identification, and the isolating of CNS was performed through rpoB gene identification and through the type of strain using the pulse gel electrophoresis procedure. Out of 960 samples, 619 were positive for CNS growth. The most prevalent species were Staphylococcus epidermidis, S. chromogenes, S. sciuri, S. simulaans, S. haemolyticus and S. capitis. The results that were found here are similar to the results observed in different parts of the world, which confirms that they are pathogens that must be constantly evaluated because they can go unnoticed in routine controls, especially in those farms where major pathogens are not a serious problem. The results determined in this study demonstrate that CNS generates a slight increase in somatic cells.

RESUMEN La mastitis es una de las enfermedades más importantes en los rebaños lecheros especializados alrededor de todo el mundo debido a los efectos sobre la producción y la salud animal. Los tipos ocasionados por estafilococos coagualasa negativo (ECN) tienen una importancia especial en una producción en la que los principales patógenos están controlados. El objetivo del presente trabajo es determinar la prevalência del ECN en un hato lechero en Boyacá y cuantificar los efectos de cada especie de ECN en el conteo de células somáticas (CCS). Se seleccionaron 40 vacas y se tomaron muestras durante 6 meses, se realizó california mastitis test (CMT) y se tomaron muestras de los resultados desde 1 hasta donde hubo trazas. También se realizó la prueba bacteriológica de rutina para la identificación del ECN y el aislamiento del ECN se realizó mediante la identificación del gen rpoB y del tipo de cepa, usando el procedimiento de electroforesis en gel de pulso. De 960 muestras, 619 fueron positivas para el crecimiento del ECN. Las especies más prevalentes fueron Staphylococcus epidermidis, S. chromogenes, S. sciuri, S. simulans, S. haemolyticus y S. capitis. Los resultados encontrados aquí son similares a resultados en diferentes partes del mundo, lo que confirma que son patógenos que deben ser evaluados constantemente porque pueden pasar desapercibidos en los controles de rutina, especialmente en aquellas fincas donde los patógenos mayores no son un problema grave. Los resultados determinados en este estudio demuestran que el SNC genera un ligero aumento de células somáticas.

Animals , Cattle , Staphylococcus , Cattle , Cells , Longitudinal Studies , Electrophoresis , Mammary Glands, Animal , Mastitis , Veterinary Medicine , Catalase , Cell Count , Prevalence , Gram-Positive Rods , Hemolysis
Medisan ; 25(3)2021. tab, ilus
Article in Spanish | LILACS, CUMED | ID: biblio-1287303


Introducción: La sangre ovina constituye un suplemento esencial en la elaboración de medios de cultivo, dado que aporta factores nutricionales indispensables para el crecimiento y la recuperación de diversos microorganismos. Objetivo: Evaluar comparativamente el efecto de la sangre ovina, tanto citratada como desfibrinada, en medios de cultivo de base agar en cuanto al crecimiento bacteriano y la producción de hemólisis de cepas de referencia de diferentes bacterias patógenas, así como la recuperación o el aislamiento de microorganismos de muestras clínicas. Métodos: Se realizó un estudio observacional, descriptivo y transversal en 6 laboratorios de microbiología de la ciudad de Santiago de Cuba durante el año 2017, en los cuales se empleó sangre de ovinos de la raza pelibuey, para la elaboración de medios de cultivo. A cada laboratorio se le suministró tanto sangre citratada como desfibrinada y se le entregó una encuesta para valorar los resultados. Resultados: Existió un mejor crecimiento y aislamiento bacteriano en el medio suplementado con sangre desfibrinada, a pesar de que el rendimiento o los resultados en el caso de la sangre citratada resultaron satisfactorios. Conclusiones: Se confirmó la pertinencia del uso de la sangre desfibrinada como suplemento de enriquecimiento nutritivo en medios de cultivo; no obstante, quedó demostrada la utilidad de la sangre citratada en la labor de rutina del laboratorio de microbiología clínica.

Introduction: Sheep blood is an essential supplement in the elaboration of culture media, as it provides important nutritional factors for the growth and recovery of different organisms. Objective: To evaluate comparatively the effect of sheep citrated and defibrinated sheep blood in culture media with agar base as for the bacterial growth and the production of hemolysis in reference strains from different pathogen bacteria, as well as the recovery or isolation of microorganisms from clinical samples. Method: An observational, descriptive and cross-sectional was carried out in 6 microbiology laboratories in Santiago de Cuba city during 2017, in which male sheeps blood from the pelibuey breed for elaborating culture media. Each laboratory received either citrated blood or defibrinated and a survey was delivered to evaluate the results. Results: There was a better growing and bacterial isolation in the media supplemented with defibrinated blood, although yielding or results were favorable with citrated blood. Conclusions: The pertinence of the use of defibrinated blood as a supplement of nutritive enrichment in culture media was confirmed; however, the use of citrated blood was demonstrated in the routine work of the clinical microbiology laboratory.

Sheep , Bacterial Growth , Culture Media , Hemolysis
Rev. bras. anal. clin ; 52(1): 48-52, 20200330. ilus
Article in Portuguese | LILACS | ID: biblio-1104464


Objetivo: Os concentrados de hemácias não estão livres de lesões de estoque, sendo a mais comum a lise das hemácias. Criar uma escala colorimétrica para inspeção visual do grau de hemólise de concentrados de hemácias. Métodos: Foram utilizadas 102 bolsas de concentrados de hemácias (n=36), concentrados de hemácias pobres em leucócitos (n=36) ou de concentrados de hemácias desleucotizadas (n=36), com até 28 dias da produção, em condições padrões de armazenamento e da rotina da Fundação Hemopa. Os valores de hemoglobina e hematócrito foram lidos em contador automatizado. O grau de hemólise foi realizado em amostras de 5 mL do segmento das bolsas, com leitura em espectrofotômetro. O teste de hemólise foi realizado com três gotas de amostras do segmento das bolsas, em tubo seco, adição de 4 mL de solução fisiológica, centrifugação e inspeção visual do sobrenadante (estudo duplo-cego). Para a confecção da escala colorimétrica foram utilizados os resultados de grau de hemólise e teste de hemólise (n=36) e registro fotográfico dos vários níveis de grau de hemólise das bolsas. Para a validação da escala colorimétrica foram realizados grau de hemólise e teste de hemólise para as bolsas restantes (n=66), e com os resultados comparados com a escala proposta (estudo duplo-cego). Resultados: Apenas 7,5% (5/66) das bolsas testadas foram negativas para o teste de hemólise clássico (visual), e positivas quando reavaliadas na escala colorimétrica proposta. Conclusão: A escala colorimétrica proposta mostrou-se simples e reproduzível para definição de teste de hemólise e o grau de hemólise para concentrados de hemácias.

Objective: Red blood cell (RBC) concentrates are not free of stock lesions, the most common of which is lysis of RBC. Create a colorimetric scale for visual inspection of the degree of hemolysis of bag red blood cells. Methods: Eighty-two bags of RBC concentrates (n = 36), RBC concentrates poor in leukocytes (n = 36) or RBC concentrates desleucotizadas (n = 36) were used with up to 28 days of production, under standard storage conditions of the Hemopa Foundation routine. Hemoglobin and hematocrit values were read in automated counter. The degree of hemolysis performed in 5ml samples from the bag segment, with spectrophotometer reading. The hemolysis test was performed with three drops of bag segment samples, in a dry tube, addition of 4 mL of physiological solution, centrifugation and visual inspection of the supernatant (double-blind study). To prepare the colorimetric scale used was the degree of hemolysis and hemolysis test results (n = 36) and photographic records of multiple levels of degree of hemolysis of bags. For the validation of the Colorimetric scale, hemolysis degree and hemolysis test were performed for the remaining bags (n = 66), and the results were compared with the proposed scale (double-blind study). Results: Only 7.5% (5/66) of the tested bags were negative for the classical (visual) hemolysis test, and positive when reevaluated on the proposed colorimetric scale. Conclusion: The proposed colorimetric scale was simple and reproducible for the definition of hemolysis test and the degree of hemolysis for RBC concentrates.

Erythrocyte Transfusion , Hemotherapy Service , Hemolysis
Acta méd. colomb ; 45(1): 40-43, Jan.-Mar. 2020. tab
Article in English | LILACS, COLNAL | ID: biblio-1124069


Abstract Wilson's disease is a rare genetic disorder that affects the excretion capacity of copper. Its distribution is worldwide, with an estimated prevalence in 30 cases per million habitants. Although the most frequent symptoms are those of hepatic and neuropsychiatric origin, hemolytic anemia with negative Coombs may be the only manifestation of the disease and its presentation usually precedes for months to clinically evident liver disease or neurological manifestations. The case of a young patient with negative Coombs hemolytic anemia and an alkaline phosphatase / total bilirubin ratio <4 and AST / ALT> 2.2 is presented, establishing Wilson's disease as a diagnosis. (Acta Med Colomb 2020; 45. DOI:

Resumen La enfermedad de Wilson es un raro trastorno genético que afecta la capacidad de excreción del cobre. Su distribución es mundial, con una prevalencia estimada en 30 casos por millón de habitantes. Aunque los síntomas más frecuentes son los de origen hepático y neuropsiquiatricos, la anemia hemolítica con Coombs negativo puede ser la única manifestación de la enfermedad y su presentación suele preceder por meses a la enfermedad hepática clínicamente evidente o las manifestaciones neurológicas. Se presenta el caso de una paciente joven con anemia hemolítica Coombs negativo y relación fosfatasa alcalina/bilirrubina total <4 y AST/ALT >2,2, en quien terminó por establecerse como diagnóstico una enfermedad de Wilson.(Acta Med Colomb 2020; 45. DOI:

Humans , Adolescent , Anemia, Hemolytic , Coombs Test , Hemolysis , Hepatolenticular Degeneration
Autops. Case Rep ; 10(3): e2020185, 2020. tab, graf
Article in English | LILACS | ID: biblio-1131823


An 80-year-old Japanese woman with diabetes mellitus was admitted with gastrointestinal symptoms and pyrexia. At presentation, liver abscesses and severe hemolytic anemia were noted. Before detailed diagnostic evaluation and adequate treatment, she suddenly died 2.5 hours after admission. The autopsy and bacteriological examinations revealed liver abscesses and massive intravascular hemolysis caused by Clostridium perfringens as well as other miscellaneous critical pathological findings, including acute renal tubular necrosis, lung edema, and pulmonary fat embolism. In this article, the detailed autopsy results are described and clinicopathologic characteristics on Clostridium perfringens-related sudden death are discussed with a review of the literature.

Humans , Female , Aged, 80 and over , Clostridium perfringens , Hemolysis , Autopsy , Fatal Outcome , Sepsis , Death, Sudden , Diabetes Mellitus , Embolism, Fat , Liver Abscess
Rev. Soc. Bras. Med. Trop ; 53: e20190214, 2020. tab, graf
Article in English | LILACS | ID: biblio-1057290


Abstract INTRODUCTION: The aim of this study was to evaluate some virulence factors in Candida albicans isolates from patients with onychomycosis and determine the correlation between these factors and the antifungal resistance profile. METHODS: Seventy species of C. albicans were confirmed using polymerase chain reaction amplification of the HWP1 gene. According to the Clinical & Laboratory Standards Institute guidelines, the susceptibility profile of four antifungal agents was investigated, and the production of aspartyl protease, phospholipase, haemolysin, and biofilm was determined. The correlation between these profiles was also investigated. RESULTS: The isolates indicated different levels of resistance and production of virulence factors. Significant correlations were observed between the minimum inhibitory concentration (MIC) of fluconazole/itraconazole and biofilm production, between phospholipase production and fluconazole/itraconazole MIC, and between fluconazole MIC and hemolytic activity in C. albicans isolates. The results also showed significant correlations between phospholipase activity and biofilm production. CONCLUSIONS: Our findings will contribute to a better understanding of the pathogenesis of C. albicans and characterize the relationship between virulence factors and antifungal resistance, which may suggest new therapeutic strategies considering the possible involvement of the virulence mechanism in the effectiveness of treatment.

Humans , Candida albicans/pathogenicity , Onychomycosis/microbiology , Virulence Factors , Antifungal Agents/pharmacology , Nails/microbiology , Phospholipases/biosynthesis , Candida albicans/drug effects , Candida albicans/ultrastructure , Microscopy, Electron, Scanning , Microbial Sensitivity Tests , Polymerase Chain Reaction , Biofilms/growth & development , Drug Resistance, Fungal , Aspartic Acid Proteases/biosynthesis , Hemolysis
Article in Chinese | WPRIM | ID: wpr-828167


The high rotational speed of the axial flow blood pump and flow separation of the centrifugal blood pump are the main causes for blood damage in blood pump. The mixed flow blood pump can effectively alleviate the high rotational speed and the flow separation. Based on this, the purpose of this study is to explore the performance of the mixed blood pump with a closed impeller. A mixed flow blood pump with closed impeller was studied by numerical simulation in this paper. The flow field characteristics and the pressure distribution of this type of blood pump were analyzed. The hydraulic performance of the blood pump and the possible damages to red blood cells were also discussed. At last, pump performance was compared with the mixed flow blood pump with semi-open impeller. The results show that the mixed flow blood pump with close impeller studied in this paper can operate safely and efficiently with a good performance. The pump can reach the pressure head of 100 mmHg at 5 L/min mass flow rate. Flow in the blood pump is uniform and no obvious separation or vortex occurs. Pressure distribution in and on the impeller is uniform and reasonable, which can effectively avoid the thrombosis of blood. The average mean value of hemolysis index is 4.99 × 10 . The pump has a good biocompatibility. Compared with the mixed flow blood pump with semi-open impeller, the mixed flow blood pump with closed impeller has higher head and efficiency, a smaller mean value of hemolysis index prediction, a better hydraulic performance and the ability to avoid blood damage. The results of this study may provide a basis for the performance evaluation of the closed impeller mixed flow blood pump.

Computer Simulation , Equipment Design , Heart-Assist Devices , Hemolysis , Humans , Thrombosis
Article in Chinese | WPRIM | ID: wpr-827172


OBJECTIVE@#To study the gene mutants of G6PD deficiency and their clinical featuers among children in Luzhou area.@*METHODS@#732 children with suspected G6PD deficiency in Luzhou area from March 2017 to July 2019 were selected, which were examined for G6PD enzyme activity and gene mutation. The G6PD enzyme activity was detected by ultraviolet rate quantification, and the gene mutation was detected by melting curve analysis-based PCR assay, and the clinical characteristics of different mutants when acute hemolysis happens were analyzed.@*RESULTS@#387 positive specimens were detected in 732 specimens, among which the gene mutation and the enzyme activity decrease was found in specimens 326, 49 specimens showed gene mutation but without the enzyme activity decrease, and 12 specimens without gene mutation but with the enzyme activity decrease. Among 375 positive samples with gene mutation, c.1376G>T, c.1388G>A, c.1024C>T and c.95A>G were the most common. The enzyme activity of c.1376G>T and c.1388G>A was statistically significantly different with c.1024C>T. The most common incentives of acute hemolysis was broad bean, the reticulocyte count was statistically significantly different among c.1376G>T, c.1388G>A and c.95A>G. The hemoglobin level of c.1376G>T was statistically significantly different from with c.95A>G. Moreover, c.1376G>T, c.1388G>A was lower than c.1024 C>T. When acute hemolysis occurs, the reticulocyte count and hemoglobin changes were different between different mutation types, while the patients age, hospitalization time, blood transfusion, total bilirubin, and urine color recovery time of the patients were not statistically different.@*CONCLUSION@#The common mutants of G6PD deficiency among children in Luzhou area are c.1376G>T, and c.1388G>A, c.1024C>T. Favism is the most common clinical manifestation of G6PD deficiency.

Child , Glucosephosphate Dehydrogenase , Glucosephosphate Dehydrogenase Deficiency , Hemolysis , Humans , Mutation
Journal of Biomedical Engineering ; (6): 1000-1011, 2020.
Article in Chinese | WPRIM | ID: wpr-879230


Heart failure is one kind of cardiovascular disease with high risk and high incidence. As an effective treatment of heart failure, artificial heart is gradually used in clinical treatment. Blood compatibility is an important parameter or index of artificial heart, and how to evaluate it through hemodynamic design and

Heart Failure , Heart, Artificial , Heart-Assist Devices , Hemodynamics , Hemolysis , Humans
Rev. fac. cienc. méd. (Impr.) ; 16(2): 10-16, jul.- dic. 2019. tab
Article in Spanish | LILACS | ID: biblio-1140238


La anemia de células falciformes es un trastorno autosómico recesivo, causado por una mutación genética que codifica la cadena ß de globina. Objetivo: caracterizar al paciente con diagnóstico de anemia de células falciformes atendidos en el Servicio de Hematología y salas de hospitalización del Hospital Escuela Universitario, período enero 2016 -junio 2017. Material y métodos: estudio retrospectivo, descriptivo transversal. Se incluyen 72 historias clínicas de pacientes con diagnóstico de anemia de células falciformes. Se definieron las variables sobre el último episodio documentado, aspectos sociodemográficos, antecedentes, presentación clínica y valores de laboratorio. Resultados: la media para la edad fue 29.7+/-13; hombres 42(58.3%) y mujeres 30(41.6%). De ellos 46(63.9%) procedían de Francisco Morazán.; 38(52.8%) presentaron trombocitosis y 32(44.4%) tuvieron hiperbilirrubinemia al ingreso; 30(41.7%) presentaron complicación relacionada con crisis vaso-oclusiva sin fallecimientos, 23(31.9%) pacientes fueron atendidos en consulta externa y 49(68.1%) fueron hospitalizados. Conclusión: la mayoría de los pacientes con diagnóstico de anemia de células falciformes eran adultos jóvenes, de predominio masculino, manejados con hidroxiurea, opioides y antibioticoterapia, presentándose como crisis vaso-oclusiva y/o crisis dolorosa, sin casos de mortalidad...(AU)

Humans , Male , Female , Adult , Middle Aged , Hematology/methods , Anemia, Sickle Cell/diagnosis , Hemolysis , Anemia/complications
Biosci. j. (Online) ; 35(6): 1979-1984, nov./dec. 2019. ilus, tab
Article in English | LILACS | ID: biblio-1049178


G6PD deficiency is associated with erythrocyte deficiency in the X-chromosome enzyme. It causes a hematologic syndrome called hemolytic anemia that connects G6PD deficiency with X-linked condition. In the Middle East, including Saudi Arabia, G6PD deficiency is the most dominant genetic blood disorders. It results in higher rates of mortality and morbidity due to its incurable long-lasting nature and prevalence of physical and psychological incapacities. In this study, an attempt was made to evaluate the prevalence of G6PD deficiency among the Saudi population in Riyadh city. A cross-sectional retrospective study was conducted at King Saud University Medical City in Riyadh, Saudi Arabia. The population of the study comprised randomly chosen males and females who visited the hospital from January 2017 to January 2018. Statistical analyses were performed using SPSS, and descriptive analysis was used to find the frequency of G6PD-deficient patients. Out of the 209 patients, 62.2% were males (n=130) and 37.8% were females (n=79). Twenty males and 6 females were found to have G6PD deficiency, with the male to female ratio being 1:3. Out of the total 130 male participants, 20 patients were found to be enzyme deficient and 6 patients of 79 female patients were found to be G6PD deficient. There were 38.4% (n=10) patients with G6PD level <4 units/gram hemoglobin, 26.9% (n=7) patients had G6PD levels of 4.1­7.0 units/gram hemoglobin, and 34.6% (n=9) patients had >7 units/gram hemoglobin. Among the G6PD patients, 23.07% patients were severely anemic, and 5 (19.2%) patients were reported to have high bilirubin. The present study revealed the G6PD prevalence to be 12.4% among the Saudi population; this value is significantly higher than that found in France, Spain, India, and Singapore. In the Saudi population, males are more vulnerable to G6PD-deficient than females. Hence, attention should be paid to G6PD-deficient patients while prescribing antimalarial medication. Such patients may be advised to avoid certain foods to minimize the risk of having hemolytic episodes.

A deficiência de G6PD está associada à deficiência de eritrócitos na enzima do cromossomo X. Causa uma síndrome hematológica chamada anemia hemolítica que conecta a deficiência de G6PD à condição ligada ao X. No Oriente Médio, incluindo a Arábia Saudita, a deficiência de G6PD é o distúrbio genético do sangue mais dominante. Isso resulta em maiores taxas de mortalidade e morbidade devido à sua natureza incurável e duradoura e à prevalência de incapacidades físicas e psicológicas. Neste estudo, foi feita uma tentativa de avaliar a prevalência de deficiência de G6PD entre a população saudita na cidade de Riade. Um estudo retrospectivo transversal foi realizado na cidade médica da Universidade King Saud, em Riade, na Arábia Saudita. A população do estudo compreendeu homens e mulheres escolhidos aleatoriamente que visitaram o hospital entre janeiro de 2017 e janeiro de 2018. As análises estatísticas foram realizadas com o SPSS e a análise descritiva foi utilizada para determinar a frequência de pacientes com deficiência de G6PD. Dos 209 pacientes, 62,2% eram do sexo masculino (n = 130) e 37,8% eram do sexo feminino (n = 79). Verificou-se que 20 homens e 6 mulheres apresentavam deficiência de G6PD, sendo a proporção homem/mulher de 1:3. Do total de 130 participantes do sexo masculino, 20 pacientes apresentaram deficiência de enzima e 6 de 79 pacientes do sexo feminino apresentaram deficiência de G6PD. Havia 38,4% (n = 10) pacientes com nível de G6PD < 4 unidades/grama de hemoglobina, 26,9% (n = 7) pacientes tinham níveis de G6PD de 4,1-7,0 unidades/grama de hemoglobina e 34,6% (n = 9) pacientes tinham > 7 unidades/grama de hemoglobina. Entre os pacientes com G6PD, 23,07% eram severamente anêmicos e cinco (19,2%) pacientes relataram ter alta bilirrubina. O presente estudo revelou que a prevalência de G6PD é de 12,4% na população saudita; esse valor é significativamente maior que o encontrado na França, Espanha, Índia e Cingapura. Na população saudita, os homens são mais vulneráveis à deficiência de G6PD do que as mulheres. Portanto, deve-se prestar atenção aos pacientes com deficiência de G6PD durante a prescrição de medicamentos antimaláricos. Esses pacientes podem ser aconselhados a evitar certos alimentos para minimizar o risco de episódios hemolíticos.

Glucosephosphate Dehydrogenase , Hemolysis , Anemia, Hemolytic
Rev. ciênc. méd., (Campinas) ; 28(1): 1-10, jan.-mar. 2019. tab
Article in English | LILACS | ID: biblio-1047794


Objective This study aimed to extract the essential oil of Curcuma longa rhizomes collected in Brazil, determine its composition by gas chromatography and mass spectrometry, and evaluate its hemolytic action and antimicrobial activity. Methods The oil extraction was performed by hydrodistillation; its composition was determined by GC-MS; the Minimum Inhibitory Concentration was evaluated through microdilution, and the hemolytic activity was analyzed in sheep red blood cells. Results The essential oil's major components are zingiberene (11%), sesquiphellandrene (10%), ß-turmerone (10%), and α-curcumene (5%). It proved efficient at inhibiting Staphylococcus aureus with Minimum Inhibitory Concentrations of 38.8µl/mL, Staphylococcus epidermidis (Minimum Inhibitory Concentrations of 50.0µl/mL), Escherichia coli (Minimum Inhibitory Concentrations of 44.4µl/mL), and Pseudomonas aeruginosa (Minimum Inhibitory Concentrations of 27.7µl/mL). Conclusion Despite provoking hemolysis in sheep red blood cells, the essential oil suggests promising results for a variety of purposes due to its antibacterial properties. Supplementary research is necessary to determine in vivo activity and the potential use of the C. longa essential oil as an antimicrobial agent in diverse situations.

Objetivo Este trabalho teve como objetivo determinar a composição e avaliar as atividades antimicrobiana e hemolítica do óleo essencial de rizomas da Curcuma longa L. Métodos A extração do óleo essencial foi realizada por hidrodestilação e sua composição determinada por cromatografia gasosa com espectrometria de massas. A Concentração Mínima Inibitória foi avaliada por microdiluição e a atividade hemolítica foi analisada em hemácias de carneiro. Resultados Os componentes majoritários encontrados foram zingibereno (11%), sesquipelenadieno (10%), ß-turmerona (10%) e α-curcumeno (5%). O óleo essencial provocou hemólise e inibiu Staphylococcus aureus (Concentração Mínima Inibitória=38,8µl/mL), Staphylococcus epidermidis (Concentração Mínima Inibitória=50,0µl/mL), Escherichia coli (Concentração Mínima Inibitória=44,4µl µl/mL) e Pseudomonas aeruginosa (Concentração Mínima Inibitória=27,7µl/mL). Conclusão Apesar de provocar hemólise, o óleo essencial analisado tem potencial para diversas finalidades, devido às suas propriedades antibacterianas. Estudos complementares são necessários para determinar a atividade in vivo e o potencial uso de óleo essencial de C. longa como agente antimicrobiano em diversas situações.

Oils, Volatile , Curcuma , Gas Chromatography-Mass Spectrometry , Anti-Infective Agents , Hemolysis
Bol. latinoam. Caribe plantas med. aromát ; 18(4): 359-377, jul. 2019. tab
Article in English | LILACS | ID: biblio-1008174


Plant species have been used for therapeutic purposes since ancient times and are still in use today since these products represent a source of raw material for the production of phytotherapeutic formulations. Screening and investigation of plants with pharmacological potential require the evaluation of characteristics related to their action, efficacy and safety in different steps. Among these steps, pre- clinical trials are used to evaluate the properties of the test product in in vitro experiments, such as cytotoxicity assays. Within this context, this study consists of a bibliometric analysis of some in vitro cytotoxicity and toxicity assays in erythrocytes used during bioprospecting of medicinal plants. The results demonstrated the wide application of erythrocytes to evaluate the biological effects of medicinal plant extracts. The methods were found to be valid and effective for the preliminary investigation of the in vitro cytotoxicity and toxicity of plant products.

El uso de especies vegetales para fines terapéuticos es una práctica histórica y todavía bastante actual, ya que estos productos pueden representar una fuente de materia prima para la producción de formulaciones fitoterápicas. En investigación de plantas con potencial farmacológico requiere la evaluación de su acción, eficacia y seguridad, a través de diferentes etapas. Entre estas, en los ensayos preclínicos se evalúan las propiedades del producto-prueba en experimentos in vitro, tales como ensayos de citotoxicidad, entre otros. En este aspecto, el presente estudio consiste en un análisis bibliométrico acerca de algunas pruebas de citotoxicidad y toxicidad in vitro en eritrocitos realizados en los ensayos de bioprospección de plantas medicinales. Los resultados evidencian la amplia utilización de eritrocitos para la evaluación de los efectos biológicos de extractos de plantas medicinales, apuntándolos como métodos válidos y eficaces para la investigación preliminar de la citotoxicidad y toxicidad in vitro de productos vegetales.

Biological Assay/methods , Plant Extracts/toxicity , Erythrocytes/drug effects , Antioxidants/toxicity , Osmotic Fragility , Oxidative Stress , Erythrocytes/cytology , Bioprospecting , Hemolysis/drug effects
Acta Paul. Enferm. (Online) ; 32(2): 139-146, Mar.-Abr. 2019. tab
Article in Portuguese | LILACS, BDENF | ID: biblio-1001055


Resumo Objetivo: Identificar as variações nos níveis de marcadores de hemólise em CH administrados por CCIP segundo o calibre do cateter. Método: Estudo experimental realizado em laboratório com condições de temperatura e umidade controladas. A amostra teve 36 alíquotas de sangue de 10 bolsas de hemácias com tipo de sangue A+; infusão de gravidade foi utilizada em seis CCIP de 3Fr (French) e seis de 4Fr, totalizando 12 experimentos divididos em três tempos: basal, fluxo livre e fluxo controlado. Analisou-se grau de hemólise, valores totais e livres de hemoglobina, desidrogenase láctica e potássio. Resultados: Houve aumento da média de hemoglobina livre (p=0,01) e grau de hemólise (p=0,01) após infusão de fluxo livre, com média de elevação de 0,04 de potássio (p<0,01) e redução de hemoglobina total (p=0,01) em fluxo controlado. O concentrado de hemácias aplicadas em 4Fr CCIP teve média de elevação de grau de fluxo. O CCIP de 3Fr teve aumento médio significante em grau de hemólise (p=0,03) e hemoglobina livre (p=0,01) após controle do fluxo. Conclusão: O CCIP de 4Fr foram associados a maiores mudanças nos marcadores de hemólise. Maior dimensão do calibre pode proporcionar fluxo turbulento, contribuindo para um maior choque entre as hemácias.

Resumen Objetivo: Identificar las variaciones de los niveles de marcadores de hemólisis en CE administrados por CCIP según el calibre del catéter. Método: Estudio experimental realizado en laboratorio en condiciones de temperatura y humedad controladas. La muestra tenía 36 alícuotas de sangre de 10 bolsas de eritrocitos con tipo de sangre A+; fue utilizada infusión por gravedad en seis CCIP de 3 FR (French) y seis de 4 FR, un total de 12 experimentos divididos en tres tiempos: basal, flujo libre y flujo controlado. Se analizó el nivel de hemólisis, valores totales y libres de hemoglobina, deshidrogenasa láctica y potasio. Resultados: Hubo un aumento del promedio de hemoglobina libre (p=0,01) y nivel de hemólisis (p=0,01) después de infusión de flujo libre, con promedio de elevación de 0,04 de potasio (p<0,01) y reducción de hemoglobina total (p=0,01) en flujo controlado. El concentrado de eritrocitos aplicados en 4 FR CCIP tuvo promedio de elevación de nivel de flujo. El CCIP de 3 FR tuvo un aumento promedio significativo en nivel de hemólisis (p=0,03) y hemoglobina libre (p=0,01) después de control de flujo. Conclusión: El CCIP de 4 FR fue asociado a mayores cambios en los marcadores de hemólisis. Mayor dimensión del calibre puede proporcionar flujo turbulento, lo que contribuye a un mayor choque entre los eritrocitos.

Abstract Objective: To evaluate the change in hemolysis markers in packed red blood cells, administered by gravity infusion in non-valved PICC lines, according to different sizes. Methods: Experimental study carried out in laboratory under controlled conditions of temperature and humidity. The sample had 36 blood aliquots from 10 packed red blood cells bags with A positive blood type; gravity infusion was used in six 3 French (Fr) PICC and in six 4Fr PICC, totaling 12 experiments divided in three moments: Basal, Free Flow and Controlled Flow. Degree of hemolysis, total and free hemoglobin values, lactic dehydrogenase and potassium were analyzed. Results: There was an average increase of free hemoglobin (p=0.01) and degree of hemolysis (p=0.01) after Free Flow infusion, with 0.04 average elevation of potassium (p<0.01) and decrease of total hemoglobin (p=0.01) in Controlled Flow. The packed red blood cells infused in 4Fr PICC had average elevation of degree of hemolysis (p=0.03) in Free Flow, and potassium (p=0.03) and degree of hemolysis (p=0.05) in the Controlled Flow. The 3Fr PICC had significant average increase in the degree of hemolysis (p=0.03) and free hemoglobin (p=0.01) after flow control. Conclusion: The 4Fr PICC were associated to higher changes in hemolysis markers. We infer that the larger size can provide a turbulent flow, contributing to a larger clash among red blood cells.

Humans , Blood Transfusion , Catheterization, Central Venous/instrumentation , Erythrocytes , Central Venous Catheters , Hemolysis , Catheters , Vascular Access Devices
Article in Korean | WPRIM | ID: wpr-719664


Neutrophilic leukemoid reaction may occur in many situations, including hemolysis, malignancy, infection, and exposure to certain toxins. It usually shows morphological overlap with chronic myeloid leukemia in which promyelocytes are not majorly associated. Here, we present a case of promyelocytic leukemoid reaction in a patient with sepsis. A 28-year-old man was admitted for renal stone removal. After percutaneous nephrolithotomy, his condition deteriorated with fever (37.8℃), tachycardia (130/min), acute renal failure, pleural effusion, and pulmonary edema. Complete blood count indicated a white blood cell count of 73.39×10⁹/L including 82% promyelocytes, hemoglobin 8.9 g/dL, and platelet count of 85×10⁹/L. A bone marrow aspirate showed that promyelocytes accounted for 73.8% of all nucleated cells. Following bone marrow examination, treatment with all-trans retinoic acid (ATRA) was started immediately. Reverse transcription polymerase chain reaction (RT-PCR) study revealed the absence of PML-RARA (promyelocytic leukemia-retinoic acid receptor alpha) and other RARA (retinoic acid receptor alpha) rearrangements. Once the chromosome analysis of bone marrow cells demonstrated the normal karyotype, ATRA was discontinued.

Acute Kidney Injury , Adult , Blood Cell Count , Bone Marrow , Bone Marrow Cells , Bone Marrow Examination , Fever , Granulocyte Precursor Cells , Hemolysis , Humans , Karyotype , Leukemia, Myelogenous, Chronic, BCR-ABL Positive , Leukemia, Promyelocytic, Acute , Leukemoid Reaction , Leukocyte Count , Nephrostomy, Percutaneous , Neutrophils , Platelet Count , Pleural Effusion , Polymerase Chain Reaction , Pulmonary Edema , Reverse Transcription , Sepsis , Tachycardia , Tretinoin