Brief reportIntravenous catheter aspiration for obtaining basic analytes during intravenous infusion
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You can draw blood from the “IV arm” below the intravenous needle if you put a tourniquet in between
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Effect of drawing blood specimens proximal to an in-place but discontinued intravenous solution
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Cited by (31)
Venipuncture versus peripheral catheter: Do infusions alter laboratory results?
2014, Journal of Emergency NursingCitation Excerpt :These differences are probably because of the difficulty in obtaining samples free from environmental air contamination, with the resulting increase in pCO2 and loss of pO2. The studies of Corbo et al6 and Herr et al8 only showed differences for HCO3–, which was ascribed, in the case of Herr et al, to the under-filling of the laboratory tubes and, in the case in Corbo et al (although the differences had no clinical relevance), to a longer time of tourniquet application for samples from the VAD. Zlotowski et al14 also associate HCO3– alteration with the use of syringes for obtaining the samples and transferring them to the laboratory tubes, which could have given rise to a certain loss of carbon dioxide and, consequently, lower values of HCO3–.
Blood samples drawn from IV catheters have less hemolysis when 5-mL (vs 10-mL) collection tubes are used
2004, Journal of Emergency NursingSpurious values of serum electrolytes due to admixture of intravenous infusion fluids
2003, Journal of Emergency MedicineAccuracy of drawing blood through infusing intravenous lines
2001, Heart and Lung: Journal of Acute and Critical CareCitation Excerpt :It has also been demonstrated that using a smaller gauge IV catheter to obtain a blood specimen results in an increased incidence of hemolysis of the specimen resulting in erroneous laboratory values.15 It is important to note that carbon dioxide (CO2) levels have been found to vary during blood sampling from peripheral devices.3 However, these findings are suspected to be false as a result of inadequate filling of the blood tubes or extended time to processing while sitting at room temperature.16
Comparison of laboratory values obtained by means of routine venipuncture versus peripheral intravenous catheter after a normal saline solution bolus
2001, Annals of Emergency MedicineCitation Excerpt :Four studies1-3,7 concluded no significant differences, but clear clinical criteria were not reported. In fact, 2 of these studies, those of Mohler et al2 and Hanover et al,7 reported larger means than our venipuncture versus first aspirate mean of 0.17 mmol/L. Only Watson et al3 reported a smaller mean of 0.10 mmol/L, and Herr et al1 did not provide numeric data for potassium. All of these studies administered much less fluid, and only Herr et al and Hanover et al could report data for participants undergoing normal saline solution infusion (the latter being a drip at only 10 mL/h).
Venipuncture versus central venous access: A comparison of methotrexate levels in pediatric leukemia patients
1999, Journal of Pediatric Oncology Nursing