Exam Preview for 1922: Capillary Blood Gas Sample for Neonatal and

Capillary Blood Gas Sample for Neonatal and Pediatric Patients: New Clinical Practice Guidelines

Please note: exam questions are subject to change.

1. When caring for a 2-month-old infant who needs a CBG, the test site from which to obtain a capillary blood sample is: Fingertip Radial artery Earlobe Heel
2. To prevent contamination of the blood sample with environmental oxygen in a capillary sample, it is important to: Hold the capillary tube close to the puncture Cool the puncture site before drawing the blood Coat the walls of the capillary tube with heparin Place the specimen on ice as soon as possible
3. In a neonate who has poor perfusion and is hypotensive or hypothermic, CBG levels: Correlate well with ABG levels Do not correlate well with ABG levels Are preferred over ABG levels Are contraindicated
4. To prepare an area for puncture before CBG collection, warming helps to ensure accurate results because it causes: Vasoconstriction, which reduces venous flow Vasodilation and increased lymphatic flow Increased arterial blood flow into the capillaries Vasodilation, resulting in increased venous flow
5. Mixing the blood specimen and heparin in the capillary tube to prevent clotting is accomplished by: Inverting the tube 8 to 10 times Inserting metal fleas and moving a magnet along a tube Shaking the capillary tube from end to end Centrifuging the specimen for 10 minutes