ABSTRACT
Background: The COVID-19 has taken the world by storm. It primarily affects the lungs causing respiratory distress and leading to ARDS. Aim: The aim of this study is to evaluate the coagulation dysfunction in patients which predisposes the patients to venous and arterial thromboembolism due to excessive inflammation, hypoxia, immobilisation and diffuse intravascular coagulation (DIC). Material & Methods: We assessed 2281 COVID RT PCR positive patients who were admitted with moderate to severe disease in wards and ICU respectively. The coagulation profile was done for each of these patients and the tests included Prothrombin time (PT), Activated Partial Thromboplastin Time (APTT) and D-Dimer. The PT and APTT were estimated on ACL elite pro (Fully automated coagulation analyser) which is based on nephelometry. D- Dimer was measured using ACL elite pro and latex agglutination (semi quantitative method). Results: Out of 2281 COVID RT PCR positive patients 1655 (72.5%) were males and 626 (27.5%) were females. It was observed that percentage of patients admitted in ICU had increased D dimer values and it was statistically significant. Our study showed that larger number of patients admitted in ICU had PT value more than 12.5 seconds and APTT more than 35.5 seconds, however it was not statistically significant. Our study also demonstrated that patients having higher D dimer required longer hospitalization with significant p value. Conclusion: We concluded that assessment of coagulation profile is necessary for patients infected with this virus so as to prevent any thrombotic complications and therefore preventing morbidity and mortality.
ABSTRACT
Background & objectives: Flow cytometry is an important tool to diagnose acute leukaemia. Attempts are being made to find the minimal number of antibodies for correctly diagnosing acute leukaemia subtypes. The present study was designed to evaluate the analysis of side scatter (SSC) versus CD45 flow dot plot to distinguish acute myeloid leukaemia (AML) from acute lymphoblastic leukaemia (ALL), with minimal immunological markers. Methods: One hundred consecutive cases of acute leukaemia were evaluated for blast cluster on SSC versus CD45 plots. The parameters studied included visual shape, CD45 and side scatter expression, continuity with residual granulocytes/lymphocytes/monocytes and ratio of maximum width to maximum height (w/h). The final diagnosis of ALL and AML and their subtypes was made by morphology, cytochemistry and immunophenotyping. Two sample Wilcoxon rank-sum (Mann Whitney) test and Kruskal-Wallis equality-of-populations rank tests were applied to elucidate the significance of the above ratios of blast cluster for diagnosis of ALL, AML and their subtypes. Receiver operating characteristic (ROC) curves were generated and the optimal cut-offs of the w/h ratio to distinguish between ALL and AML determined. Results: Of the 100 cases, 57 of ALL and 43 cases of AML were diagnosed. The median w/h ratio of blast population was 3.8 for ALL and 1 for AML (P<0.001). ROC had area under curve of 0.9772.The optimal cut-off of the w/h ratio for distinction of ALL from AML was found to be 1.6. Interpretation & conclusions: Our findings suggest that if w/h ratio on SSC versus CD45 plot is less than 1.6, AML may be considered, and if it is more than 1.6, ALL may be diagnosed. Using morphometric analysis of the blast cluster on SSC versus CD45, it was possible to distinguish between ALL and AML, and their subtypes.