Challenge Your Exam Readiness With Our Free Phlebotomy Practice Questions

The lymphatic system returns interstitial fluid to the venous circulation via channels containing valves and lymph nodes. After lymph node dissection or radiation (e.g., post-mastectomy), lymphatic flow is impaired; venipuncture or blood pressure on the affected limb increases risks of lymphedema, infection, and poor healing. Therefore, select the contralateral limb whenever possible and consult the provider if both arms are affected. Option B reflects patient-safety guidance. Arterial sticks (Option A) are not “safer” and are not routine for phlebotomy. The lymphatic system indeed has valves (contradicting Option C). Lymphatic considerations directly inform site selection (Option D is false). Document any restrictions, use alternatives (hand veins, opposite arm, approved lower-extremity site with order, vascular access device per policy), and apply careful hemostasis. These principles are frequently examined due to their strong impact on patient outcomes.