1. The patient is too nervous, and the vacuum blood collection tube is too constricted to block the needle tip to ease the patient, gently rub the patient's puncture site or slightly rotate the venipuncture needle.
2. The patient's physique is different, and the blood viscosity is high (such as the elderly, high fever, severe burn patients, etc.)-when the patient's traumatic surface is acceptable, choose a blood sampling needle that is one size larger than the infusion or choose the median cubital vein or more expensive Need venipuncture.
3. The patient's selection of the venipuncture site is not appropriate (for example, due to the selection of a smaller blood vessel or the accurate location and direction of the blood vessel cannot be touched)-slightly rotate the venipuncture needle or re-puncture.
4. When using the infusion blood collection needle, the connection part of the tube and the tube plug puncture needle is not tightened, and the vacuum is severely leaked (applicable to the soft connection blood collection needle)-tighten the connection part of the tube and the tube plug puncture needle clockwise.
5. The end point judgment is inaccurate, and the tube changing time is too early—Accurately grasp the end point judgment.
6. The selection of the lancet model is too small, and the time for changing the tube is prolonged, causing exogenous coagulation. If the traumatic surface of the patient is acceptable, choose a lancet that is one size larger than the infusion.
7. The insertion depth of the tube plug puncture needle is not enough, the rubber stopper is not penetrated or the needle insertion slope is too large, and the side wall of the rubber stopper is inserted-the tube plug puncture needle is inserted into the rubber stopper vertically.
8. The blood collection tube is damaged by external force and the vacuum is lost-check before use.
9. The needle tip is blocked or the blood vessel collapses-gently rub the patient's puncture site or slightly rotate the venipuncture needle.
