1, in order to reduce the fluctuation of test results due to the time of blood collection, each blood collection is best fixed at the same time.

2, from the prone position to the upright position, the measured value of some items of blood specimens collected has a tendency to increase.

3, the tourniquet pressure pulse time can not be too long, too long easy to cause a variety of changes in the composition and intravascular hemolysis.

4, the concentration of many components in red blood cells is several times or tens of times higher than in serum, hemolysis can affect the analysis of that component.

5, syringes and needles should be clean, dry and sterile, preferably disposable syringes.

6, the air bubbles generated in the syringe when drawing blood should not be injected into the test tube, otherwise it will easily cause hemolysis.

7、Serum should be separated promptly after blood collection, and the centrifugation speed should not be too high and the centrifugation time should not be too long when separating serum.

8、Avoid drawing blood as the specimen to be examined during infusion and medication.

9, if the blood specimen can not be sent in time for testing, the serum or plasma should be separated and stored at 4 ℃.

The collection of special specimens for men and women.

Men: take urethral secretions with a fine cotton swab into the urethra about 2-4 cm, slightly twist the swab to remove the secretions (should be slightly mucous membrane). Place the secretion or cotton swab in a 1.5 ml centrifuge tube plus 1 ml sterile saline, rotate the swab in the tube, mix thoroughly, and after processing, press the lid tightly and seal the mouth of the tube with adhesive tape to prevent leakage of the specimen and write the name clearly. (Handle the specimen in an aseptic manner).

Women: vaginal ---- wash away the extra-cervical secretions (avoid leucorrhoea) with sterile saline cotton balls, then insert a sterile cotton swab into the cervix, stop for 5 seconds and spin the cotton swab to take the cervical secretions, place the cotton swab into a 1.5 ml centrifuge tube plus 1 ml sterile saline, spin the swab in the tube, stir it well, after processing, press the lid tightly and seal the mouth of the tube with adhesive tape to prevent specimen After processing, press the lid tightly and seal the mouth of the tube with adhesive tape to prevent the specimen from leaking and write the name clearly. (Handle specimens in an aseptic manner).

Condyloma acuminatum should be collected from warts or tissue fluid in a sterile test tube and sent for examination.