Serum zinc (Zn)

Zinc is one of the main trace elements in the human body. It is involved in the formation of many coenzymes and plays an important role in growth, mental development and maintenance of immune function. Serum zinc content has physiological changes in normal people: 1 gender difference is lower in women than in men; 2 children are lower, but the change is large; 3 days is the highest at 8 o'clock in the afternoon, 3 to 9 in the afternoon; 4 is reduced after 3 h after eating About 20%.

Basic Information

Specialist classification: growth and development examination classification: blood examination

Applicable gender: whether men and women apply fasting: fasting

Tips: Do not eat too greasy, high-protein foods the day before the blood draw, avoid heavy drinking. The alcohol content in the blood directly affects the test results. Normal value

Serum 10.7 to 17.7 μmol/L.

Urine 15.36 ~ 153.6 μmol / 24h.

It is recommended that each laboratory establish its own range of normal values.

Clinical significance

1, below normal

1 liver and gallbladder disease liver cirrhosis, acute and chronic hepatitis, obstructive jaundice and so on.

2 blood diseases, a variety of anemia (malignant anemia, aplastic anemia, iron deficiency anemia, etc.), leukemia (ALL, CLL), multiple myeloma.

3 malignant tumors, sarcomas, malignant lymphomas, metastatic cancers, etc.

4 heart disease myocardial infarction, endocarditis and so on.

5 digestive tract disease inflammatory bowel disease, gastric ulcer, rectal ulcer, intestinal fistula and so on.

6 kidney disease nephrotic syndrome, chronic renal insufficiency.

7 neurological diseases myasthenia gravis, polyneuritis, central nervous system degeneration and so on.

8 endocrine diseases Edison disease, Simons disease, mucinous edema.

9 infectious diseases acute and chronic infectious diseases.

10 skin diseases Hansen disease, leukoplakia, intestinal dermatitis and so on.

Others include drugs (cortisone, anticancer agents, antibiotics, birth control pills, etc.), intravenous high nutrition, pregnancy, surgical trauma, hemorrhoids, burns, and low-zinc diets.

2, higher than normal

1 blood diseases hemolytic anemia, polycythemia, eosinophilia and the like.

2 endocrine diseases hyperthyroidism.

3 circulatory system disease essential hypertension.

4 other X-ray irradiation, oral zinc, zinc poisoning, etc.

Low results may be diseases: zinc deficiency in children, high zinc deficiency results may be disease: zinc poisoning precautions

First, the precautions before blood draw

1, do not eat too greasy, high-protein food the day before the blood, to avoid heavy drinking. The alcohol content in the blood directly affects the test results.

2. After 8 pm on the day before the physical examination, fasting should be done to avoid affecting the detection of indicators such as blood glucose in the second sky.

3, should relax when taking blood, to avoid the contraction of blood vessels caused by fear, increase the difficulty of blood collection.

Second, should pay attention after blood draw

1. After blood is drawn, local compression is required at the pinhole for 3-5 minutes to stop bleeding. Note: Do not rub, so as not to cause subcutaneous hematoma.

2, the pressing time should be sufficient. There is a difference in clotting time for each person, and some people need a little longer to clotting. Therefore, when the surface of the skin appears to be bleeding, the compression is stopped immediately, and the blood may be infiltrated into the skin due to incomplete hemostasis. Therefore, the compression time is longer to completely stop bleeding. If there is a tendency to bleed, the compression time should be extended.

3, after the blood draw symptoms of fainting such as: dizziness, vertigo, fatigue, etc. should immediately lie down, drink a small amount of syrup, and then undergo a physical examination after the symptoms are relieved.

4. If there is localized congestion, use a warm towel after 24 hours to promote absorption.

Inspection process

Blood was collected from the vein and serum was separated in time. Generally, it is detected by colorimetry, and the linear range of the method can reach 500 μg/dl (76.8 μmol/l).

Not suitable for the crowd

1. Patients who have taken contraceptives, thyroid hormones, steroid hormones, etc., may affect the results of the examination and prohibit patients who have recently taken the drug history.

2, special diseases: patients with hematopoietic function to reduce disease, such as leukemia, various anemia, myelodysplastic syndrome, etc., unless the examination is essential, try to draw less blood.

Adverse reactions and risks

1, subcutaneous hemorrhage: due to pressing time less than 5 minutes or blood draw technology is not enough, etc. can cause subcutaneous bleeding.

2, discomfort: the puncture site may appear pain, swelling, tenderness, subcutaneous ecchymosis visible to the naked eye.

3, dizzy or fainting: in the blood draw, due to emotional overstress, fear, reflex caused by vagus nerve excitement, blood pressure decreased, etc. caused by insufficient blood supply to the brain caused by fainting or dizziness.

4. Risk of infection: If you use an unclean needle, you may be at risk of infection.