Note when taking venous blood for testing

This is an automatically translated article.

Venous blood collection is a technique that requires testing technicians to have certain experience in using instruments, taking venous veins, determining injection sites and psychological stability.

1. Psychology of the patient

Patient psychology is quite important when drawing venous blood. The patient needs to be clearly explained the procedure and mentally prepared to cooperate. In case the patient is too scared, it will cause vasoconstriction, making it difficult to draw venous blood. Sometimes the technician has just inserted the needle into the pulse, the patient is in pain, suddenly withdraws his hand, leading to a dislocation of the vein. Children in particular are often uncooperative, fussy and protesting. Therefore, you need to guide the child's parents and cooperate with them to comfort the child.

2. Psychology of technicians

Besides the psychology and emotions of the patient, the psychology of the person taking the blood is equally important. You will not be able to draw blood well when your psychological state is unstable. Concentration during venipuncture will easily lead to errors in manipulation. In some cases, it is performed by the usual way of venipuncture, sometimes the first time the vein can't be removed, it has to be repeated for the 2nd time, the 3rd time, the psychology is also less or less, even shaking hands, especially is when a patient screams pain, complains, or shows discomfort.
Thus, before taking venous blood, you need to mentally prepare yourself to be very stable, to avoid being influenced by others. If your psychology is not good or determined that you cannot get it, you should take a break and ask someone else to take it instead.

3. Choose a blood collection device

You should prepare a full kit before conducting venipuncture. Instruments should not be left unattended during manipulation, as it will be very difficult to handle, leading to the patient feeling unprofessional and insecure. Remember to always wear gloves during the entire blood test collection process. Wash hands immediately after taking blood.
Blood collection needle also plays an important role. Using the appropriate needle will make blood collection easier, faster, less likely to break red blood cells, and less painful for the patient.

4. Blood collection location

If there are no special requirements, choose the easiest circuits to obtain. Normally, the middle vein of the M vein in the elbow crease is the easiest place to draw blood because the vein is the largest and most solid. However, not all patients can obtain it at that site. For those who can't see the pulse in that position, check the next hand.
If you still can't locate the blood collection site, move to the back of the hand or wrist, which are also relatively easy locations to draw venous blood. If still undetermined, ask the patient to gently move the arm, especially on cold days. Locating the collection site is often more difficult in children, especially those who are obese.

5. How to get vein

Currently, there are many ways to get venipuncture, each person can choose their own way in accordance with their own habits. When you can't see the pulse clearly, you can touch and feel the pulse with your hand. In addition, determining the path of the circuit is also important, in order to limit the collision or through the circuit.

6. Manipulation of blood collection

After determining the exact pulse, you perform disinfection and draw blood. Insert the needle rapidly through the skin then gradually approach the pulse site, do it firmly but with control. If you push the needle too fast, you can easily pass the needle through the vein and break the pulse. Once the needle is in the vein, you need to draw blood slowly and evenly. The purpose of this is:
Do not cause a sudden change in pressure, and therefore do not rupture the red blood cells. Do not cause sudden vasoconstriction. Many patients have very fragile blood vessels, when you withdraw quickly and suddenly, the blood vessels inadvertently constrict at the extraction site, resulting in you not being able to aspirate blood. An extremely important thing is that you must pay attention in the manipulation of the needle. If the needle is not fixed well, it is easy to slip the needle out of the vein. During venipuncture, try to keep the needle in a fixed position, avoiding pushing deeper or retracting.
After drawing the required amount of blood for a blood test, remove the needle quickly. Remember to put cotton in place before withdrawing the needle to avoid bleeding out, causing panic for the patient. Instruct the patient to hold the cotton gently with their hands, do not rub the cotton or fold their hands, because there is a risk of rupturing the blood vessels.
In the event that the pulse is not inserted properly or the blood cannot be drawn enough, do not worry, gently re-adjust the needle. If, after up to 3 re-adjustment of the needle, it still does not work, remove the needle and operate it again in another position. In this situation, the patient often feels uncomfortable and begins to worry. Therefore, you need to be specific and comfort the patient so that they feel more comfortable while you are trying to draw blood. If you've tried another location but still can't locate the pulse or find it too difficult, have someone else pick it up for you.
The technician taking venous blood should make sure to follow standard operating procedures. In addition, the psychological stability of the patient and himself also plays an important role in the entire blood collection process.
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Reference source: xetnghiemchuan.vn