A STUDY OF HEMATOLOGICAL AND BIOCHEMICAL PARAMETERS IN ASSESSING SEVERITY IN COVID-19 PATIENTS

ABSTRACT

Background: The severity of COVID-19 could be evaluated by examining several blood parameters mainly white blood cell (WBC) count, granulocytes, platelet, and novel hemocytometric markers neutrophils to lymphocyte ratio (NLR), platelet-to-lymphocyte (PLR),lymphocyte to monocyte ratio (LMR) and biochemical parameters such as CRP,D-dimer,Serum ferritin, LFT, KFT etc. The present study has been carried out Methods and Material: on 100 RTPCR conrmed covid-19 patients over a period of one year from July 2021 to June 2022. Clinical features, investigations, and history of associated risk factors were extracted from case records.Samples were processed in Medonic M series ve part haematology analyzer.SELECTRA PRO M and ARCHITECT plus machine was used for LDH, AST, ALT,C- reactive protein (CRP),Serum creatinine and serum urea.Samples for electrolytes were processed in INNOLYTE MACHINE. The sample for D-dimer and PT INR were processed in STA SETELLITE Max haemostasis analyser. Samples for procalcitonin were processed in CARDIAMARKER HIA-1200 machine.Chi squre test was used for analyzing signicant correlation among different parameters and covid-19 severity.P value<0.05 was dened as statistically signicant for all statistical test. Statistical analysis used Results:Retrospective observational study Among 100 RTPCR conrmed cases,40,36,20 and 4 were mild, moderate, severe and critical respectively.Total total neutrophils count signicantly raised in critical patients(p value<0.05) while absolute lymphocyte count was signicantly decreased in critical patients(p value<0.05).NLR was signicantly raised in critical patients and LMR,PLR were also signicantly related to disease severity.CRP,S.ferritin and D- dimer were signicantly raised in critical patients(p value<0.05).Besides above parameters, Serum LDH,Serum electrolytes,AST,AL,.PT-INR were also raised in critically ill patients(p value<0.05). The severity of COVID-19 can Conclusions: be identied at an early stage by following the different routine biochemical marker levels and subsequently improve prognosis.parameters