What might indicate an improper venipuncture technique?

Excessive pain or swelling during a venipuncture is a strong indicator of an improper technique. Normally, a properly executed venipuncture should cause only minimal discomfort. If the patient experiences significant pain or noticeable swelling at the site, it may suggest several issues, such as the needle being improperly inserted into the vein or possibly even perforating the vein. This can result in complications like hematomas or phlebitis, which are not only uncomfortable for the patient but can also affect the quality of the blood sample collected. Thus, recognizing excessive pain or swelling is crucial for ensuring the safety and comfort of the patient, as well as the integrity of the blood draw procedure.