Which venous conditions should be avoided when selecting a site for venipuncture?

Choosing the appropriate site for venipuncture is crucial to ensure the safety and success of the procedure. The correct answer highlights that thrombosed, tortuous, or rolling veins should be avoided.

Thrombosed veins are those that have formed a blood clot, which can pose a risk for further complications if punctured. Attempting to draw blood from a thrombosed vein may lead to pain for the patient, difficulty in obtaining blood, and potential injury to the surrounding tissues.

Tortuous veins are those that are twisted or have an unnatural path. They can be challenging to navigate with a needle, increasing the risk of complications such as puncturing through the vein or missing the vein entirely.

Rolling veins refer to veins that are not anchored firmly in place and tend to move with palpation. This makes it extremely difficult to successfully insert the needle and collect the sample, which can frustrate both the healthcare provider and the patient.

In summary, the best practice is to select a site with healthy, straight, and stable veins to ensure a smooth venipuncture process and minimize discomfort and complications for the patient.