Final answer:
Proper nursing consideration for blood draws in patients on parenteral nutrition includes avoiding the use of the PN line for drawing blood samples to prevent sample contamination and inaccurate lab results.
Step-by-step explanation:
When considering nursing care related to blood draws for patients with parenteral nutrition (PN), specific practices must be adhered to in order to avoid complications and ensure accurate laboratory results. Avoid drawing blood from the PN line is the proper consideration among the options provided. This is important to prevent contamination of the blood sample with PN solution, which could lead to inaccurate lab results. Instead, blood should be drawn from a different site to ensure the sample reflects the patient's true physiological status.
Using the same site as the PN infusion for blood draws or drawing blood immediately after a PN infusion are not recommended practices. These actions can lead to skewed lab results and potential site complications. Furthermore, the gauge of the needle used for blood draws is generally determined by the size of the patient's vein and the volume of blood needed, rather than the presence of a PN line.