Ability ontrouble shooting during blood collection is greatly concerned as an important factor, so competency on problem solving was assessed in details as shown in Table 3. Problems i.e. penetration of needleinsertion thru the vein, formation of hematoma, allergies to antiseptic agents, failure to draw twice times, and occurrence of nerve injury during venipuncture were assessed; because these problems played a high impact on patient safety as well as patient satisfaction.