Urine magnesium (Mg)

Adults contain 20-30 g of magnesium, about 50% to 70% of the bones are distributed in the bones, and the rest are distributed in various soft tissues such as skeletal muscle, heart muscle, liver, kidney and brain. Mg2+ is mainly present in intracellular fluids, and extracellular fluids account for only 1%. Magnesium in red blood cells is about three times that of magnesium in plasma. About 65% to 80% of serum magnesium is present in free form, and the rest is present in combination with plasma proteins. Blood magnesium has a synergistic inhibitory effect on neuromuscular stress. Magnesium is ubiquitous in a variety of foods, and adults need about 20 mmol/L (0.5 g) of magnesium per day. The main route of excretion of magnesium in the body is the kidney. The kidney has a strong magnesium-suppressing capacity. When the magnesium intake is insufficient, the magnesium output of the kidney can be less than 1mmol/24h. The atomic weight of Mg is 22.990. Basic Information Specialist classification: urinary examination classification: urine / kidney function test Applicable gender: whether men and women apply fasting: not fasting Analysis results: Below normal: 1 Magnesium is lost from the digestive tract such as long-term fasting, malabsorption, long-term loss of gastrointestinal fluid (chronic diarrhea, malabsorption syndrome, postoperative intestinal fistula and long-term attraction of gastric juice, etc.) and severe vomiting. 2 Magnesium is lost by urinary tract such as chronic nephritis during polyuria or long-term treatment with diuretics. 3 endocrine diseases such as hyperthyroidism, hyperparathyroidism, diabetic acidosis, hyperaldosteronism and long-term treatment with corticosteroids. Normal value: Magnesium (Mg): 3.0-4.5mmol/24h Above normal: 1 Kidney disease: Anyone who affects the glomerular filtration rate can increase the retention of urinary magnesium, such as acute or chronic renal failure, uremia, chronic nephritis and oliguria. 2 endocrine diseases: such as hypothyroidism (myxedema), hypoparathyroidism, Addison's disease and severe diabetic acidosis. 3 other reasons: hypermagnesemia can also be seen in multiple myeloma, severe dehydration, arthritis and other diseases. In addition, taking magnesium and oxalic acid poisoning will also increase urinary magnesium. negative: Positive: Tips: It is forbidden to exercise vigorously. The licorice, raw ketone, amphetamine, amphotericin B, barbital and other drugs are stopped one week before the test. Drinking alcohol is prohibited for 3 days before the test. The middle part of the urine is taken for inspection. Normal value The amount of urinary magnesium excretion is 3.0 to 4.5 mmol/24 h. Clinical significance Abnormal result 1, increased urinary magnesium (1) Kidney disease Anyone who affects glomerular filtration rate can increase urinary magnesium retention, such as acute or chronic renal failure, uremia, chronic nephritis and oliguria. (2) Endocrine diseases such as hypothyroidism (myxedema), hypoparathyroidism, Addison's disease, and severe diabetic acidosis. (3) Other causes Hypermagnesemia can also be seen in multiple myeloma, severe dehydration, arthritis and other diseases. In addition, taking magnesium and oxalic acid poisoning will also increase urinary magnesium. 2, urinary magnesium reduction (1) Magnesium is lost from the digestive tract such as long-term fasting, malabsorption, long-term loss of gastrointestinal fluid (chronic diarrhea, malabsorption syndrome, postoperative intestinal fistula and long-term attraction of gastric juice, etc.) and severe vomiting. (2) Magnesium is lost from the urinary tract such as chronic nephritis during the polyuria or long-term treatment with diuretics. (3) endocrine diseases such as hyperthyroidism, hyperparathyroidism, diabetic acidosis, hyperaldosteronism and long-term treatment with corticosteroids. People who need to be tested People with severe vomiting, diarrhea, indigestion, joint pain and other symptoms. Low results may be diseases: high results of hyperthyroidism in the elderly may be diseases: precautions for arthritis Before the test: prohibit strenuous exercise, maintain a good diet and work schedule, stop the licorice, raw stomach ketone, amphetamine, amphotericin B, barbital and other drugs one week before the test. Drink alcohol for 3 days before the test. At the time of examination: a part of the urine is discharged first to wash away the bacteria remaining in the urethra and the anterior urethra, and then the middle part of the urine is taken for inspection. Inspection process The urine of the subject is collected and detected by chemical methods. Not suitable for the crowd Women in the menstrual period, cold patients. Adverse reactions and risks Generally no complications and harm.

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