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Common problems and solutions in the use of vacuum blood collection tubes

Vacuum blood collection tube is a new product used in clinical examination blood collection in recent years. Because of its easy operation, clean, safe, accurate and reliable, it is widely used in hospitals. But in the process of clinical use, various problems occur from time to time, which affect the smooth collection of specimens. The following only analyzes the reasons for the problems we found in the actual operation process and proposes improvement measures. When collecting blood, it is still necessary to observe the blood inflow from time to time for targeted treatment.
1. Hemolysis
Reason: The negative pressure of the vacuum tube is relatively large. At the beginning of blood collection, the blood flows into the bottom of the tube at a fast speed. The red blood cells can rupture when the red blood cells collide with each other, and hemolysis is occasionally seen in clinical practice.
Measures: When collecting blood samples, tilt the side needle of the two-way lancet blood collection tube so that it is close to the side wall of the blood collection tube, and the blood flows down slowly along the tube wall to avoid direct impact of red blood cells and cause rupture.
2. Leaking blood
Reason: The latex sheath of the blood collection tube of the two-way lancet is loose or the needle is pierced out of the latex sheath, so that the two-way lancet is not tightly sealed. During venipuncture, blood leaks along the end of the blood collection tube of the bidirectional blood collection needle.
Measures: Check and tighten the latex sheath before blood sampling. If the needle is punctured, re-cover the needle to maintain its tightness.
3. Poor blood flow
Reason: The puncture needle sticks to the blood vessel wall or there is no negative pressure in the blood collection tube.
Measures: Under the premise of ensuring the success of venipuncture, adjust the direction of the needle until the blood flows into the blood collection tube. If it is invalid, replace the blood collection tube.
4. Insufficient or excessive blood collection
Reason: A few inevitably have quality problems, and the negative pressure in the blood collection tube is insufficient or too high.
Measures: (1) Insert the needle of the syringe from the rubber stopper of the blood collection tube, and suck the air in the blood collection tube to form a negative pressure to collect a blood sample. The blood collection tube can be directly replaced when the original blood volume is low. (2) mention
Pull out the puncture needle before.
5. The puncture needle comes out
Cause: It is caused by mechanical traction, especially when blood is collected from multiple blood collection tubes.
Measures: When more blood collection tubes are used in one blood collection, focus on effective fixation; when replacing blood collection tubes, the movement range should be small to prevent the needle from coming out and increasing the patient’s pain.