The page below is a sample from the LabCE course Minimizing Pre-Analytical Variability During Venipuncture and Urine Sample Collection Processes. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

Learn more about Minimizing Pre-Analytical Variability During Venipuncture and Urine Sample Collection Processes (online CE course) »
How to Subscribe
MLS & MLT Comprehensive CE Package
Includes 97 CE courses, most popular
$95 Add to cart
Pick Your Courses
Up to 8 CE hours
$50 Add to cart
Phlebotomy CE Package$45 Add to cart
Individual course$20 Add to cart

Intravenous Solutions

To minimize the possibility of contaminating a venous blood sample with an intravenous (IV) solution or infused blood product, phlebotomists are trained to select the opposite arm or an alternate site if both arms are receiving IV therapies. Blood samples diluted with IV fluids can yield erroneous laboratory results, and depending on the degree of dilution, may not be immediately identified as being contaminated.
While some healthcare professionals may attempt to collect a venous sample "above" the IV infusion site, this practice may result in the vacuum aspiration of the infused solutions, especially in patients with poor circulation, or whose IV site is raised above the phlebotomy site.