Final answer:
Physical changes in veins, reduced blood flow, and cognitive issues or anxiety can make venipuncture challenging for geriatric patients.
Step-by-step explanation:
A characteristic of geriatric patients that may make venipuncture challenging is physical changes in their veins. As people age, their veins become more fragile and prone to collapsing or bruising. This can make it difficult to find a suitable vein for drawing blood.
In addition, elderly individuals may have reduced blood flow or poor circulation, which can further complicate the process of venipuncture. The decreased blood flow may result in smaller or less prominent veins, making them harder to locate and access. Lastly, some geriatric patients may have cognitive issues or anxiety, which can make them more resistant or fearful of the procedure. This can lead to increased muscle tension and difficulty in keeping the arm still during venipuncture.