NHA Phlebotomy Certification Practice Exam

What is the appropriate angle for needle insertion in venipuncture?

1. 15-30 degrees

2. 30-45 degrees

3. 45-60 degrees

4. 10-15 degrees

The correct answer is: 30-45 degrees

The appropriate angle for needle insertion during venipuncture is between 30 to 45 degrees. This angle allows for optimal access to the vein while minimizing the risk of puncturing through the vein wall. Inserting the needle at this angle facilitates a smoother entry, which can help ensure that the needle enters the vein cleanly and allows for effective blood flow into the collection device. When the needle is positioned correctly, healthcare professionals can also better control the depth of the insertion and reduce discomfort for the patient. An angle that is too shallow may cause the needle to slide off the vein, while an angle that is too steep may lead to complications, such as puncturing through the posterior wall of the vein. Therefore, maintaining an angle within the 30 to 45 degrees range strikes a balance that is generally regarded as the best practice for successful venipuncture.