The Biochemical parameters in venous blood sampling by direct venipuncture and peripheral intravenous catheter
AbstractObjective: The aim of this study was to compare the results of some biochemical values in venous blood samples obtained by direct venipuncture (DV) and peripheral venous catheter (PVC).
Methods: In this cross-sectional study, 78 hospitalized patients in different wards of Poor-Sina Medical and Educational Center of Rasht in 2017 were divided into three equal groups, including patients who were treated with normal saline and dextrose saline and those who did not receive this solution. Two separate blood samples were obtained from each patient, one from PVC and the other from DV. The levels of sodium, potassium, creatinine and blood urea nitrogen (BUN) were measured and compared.
Results: Difference of PVC with DV in BUN was generally 0.32±3.18 mg/dl; creatinine, sodium and potassium were 0.02±0.12 mg/dl, 1.00±2.49 mEq/L and 0.15±0.48 mEq/L respectively. There were no statistically significant differences between the two methods in relation to BUN and creatinine (P = 0.377 and P = 0.149, respectively), but significant differences in levels of sodium and potassium were observed between the two blood sampling methods (P = 0.001 and P = 0.008, respectively).
Conclusion: According to the results of this study and other studies, PVC can be used to measure BUN and creatinine, not so for sodium and potassium. For other parameters, further investigation is needed.
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