What are the common blood collection methods?

Generally, the most common blood collection method used in clinical practice today is venipuncture, which is simple and rapid. The specific procedure is as follows:

1. First, the physician evaluates the patient's condition and vascular status, and explains to the patient the purpose, method, and precautions regarding blood collection.

2. The physician must disinfect both hands and sterilize the equipment.

3. The patient may sit or lie down. The sleeve of the arm being used should be rolled up to fully expose the arm.

4. The physician applies a tourniquet approximately ten centimeters above the elbow on the patient’s arm to make the veins more prominent.

5. A sterile cotton swab dipped in iodophor is then used to disinfect the skin around the puncture site.

6. The blood collection needle is inserted into a superficial vein at the disinfected site, blood is collected into the specimen tube, and then the needle is removed.

7. After removing the needle, press the puncture site with a cotton swab and release the tourniquet.

It is recommended to visit a正规 hospital and undergo the procedure under the guidance of a qualified medical professional.