How big is the daily workload of the kidneys？ Do four things well to prevent renal failure
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How much does the kidney work every day?
Chen Min, chief physician of Department of Nephrology, Peking University First Hospital, and deputy director of Peking University Institute of Nephrology: The human body has two kidneys, which are located on both sides of the spine and are about the size of a fist. The "blood filtration project" needs 1.7 million to 2.4 million nephrons. Nephron consists of renal corpuscle and renal tubule, and renal corpuscle includes glomerulus and renal capsule. During the day and night, human blood has to be sieved by the kidney for 40~50 times to ensure that the waste produced by metabolism is excreted in time, and the workload is very heavy.
The kidney filters about 1.2 liters of blood per minute, accounting for about 24% of the cardiac output. When the blood enters the kidney, the glomerulus filters out substances such as water in the plasma; The filtered substances enter the renal capsule to form protourine, but useful components such as protein, amino acids and sugar remain. After the renal tubule "receives" the original urine, it reabsorbs the useful components, and at the same time discharges the hydrogen ions and ammonia ions that are not needed by the human body to form urine. In this process, nephron maintains the balance of water and electrolyte.
In addition to these, the kidney also participates in endocrine regulation, which can release a variety of hormones, such as renin, prostaglandin and erythropoietin, which can help regulate blood pressure, promote the metabolism of active vitamin D, maintain normal bone metabolism and regulate the production of red blood cells.
Do four things well to prevent renal failure
Chen Min, chief physician of Department of Nephrology, Peking University First Hospital, and deputy director of Peking University Institute of Nephrology: The onset of renal diseases is hidden and difficult to detect. If early detection and early intervention can significantly reduce the complications of patients and significantly improve the survival rate. Patients with diabetes and hypertension are the most high-risk groups of renal diseases. In addition to actively controlling blood sugar and blood pressure, such people need to pay attention to renal function regularly and regularly detect urinary protein levels and serum creatinine levels. Even healthy people should do the following to care for delicate kidneys.
Don’t overeat. Eating too much food at one time will not only increase the burden on the digestive system in a short time, but also produce too much metabolic waste and increase the burden on the kidneys. Long-term overeating can also induce hypertension, diabetes, etc., which will lead to secondary nephropathy. It is suggested to eat some fresh fruits and vegetables such as apples properly, which is beneficial to kidney health.
Avoid repeated dehydration. Repeated dehydration caused by high temperature environment is related to the increased risk of chronic renal damage. During dehydration, the secretion of angiotensin and antidiuretic hormone increases, renal blood vessels contract and urine is concentrated. If you don’t replenish water in time, dehydration will be serious and blood volume will be insufficient, which will lead to kidney hypoxia and blood flow reduction, and eventually lead to kidney damage.
Pay attention to the urine situation. The most intuitive manifestation of kidney problems is urine changes, such as obvious deepening of color, obvious foam and sudden increase of nocturia. In these cases, you should seek medical attention in time, especially those who are accompanied by obvious weight gain and edema, and are likely to have kidney disease.
Pay attention to regular physical examination. People aged 45 and above have to undergo physical examination every year. Those who have a family history of kidney disease, or have a history of diabetes, hypertension, proteinuria and gout, and often take antibiotics and nephrotoxic Chinese medicines, it is best to check once every six months to be alert to renal failure.
Soaking feet at nine o’clock in the evening is the best way to protect the kidney.
Jiang Haitao, Deputy Chief Physician, Department of Cardiology, Second Affiliated Hospital of Tianjin University of Traditional Chinese Medicine: It is most appropriate to soak your feet in warm water from 9: 00 pm to 11: 00 pm, which can attract our spirit to the lower limbs. Spirit plays a leading role in qi and blood, and qi and blood will descend if you concentrate on it. For some mental workers, it is very useful for the spirit of qi and blood to descend, because after thinking about the problem for a day, the spirit is concentrated on it, and the brain is more excited, so it is more difficult to fall asleep at night. After soaking feet in warm water, the spirit and qi and blood are easier to return, that is, to return to their base camp, and the kidney dominates the storage of essence, so it is the kidney that is replenished after collection.
The kidney meridian of human body starts from the first step. After soaking feet in warm water, it plays a warming role and is a benign stimulus to the kidney meridian, which will naturally play a good role in the kidney. Therefore, although no measures have been taken for the kidney, the meridian can also play a role in tonifying the kidney.
It should be noted that the water temperature of soaking feet must be moderate, not too hot or too cold. If the water temperature is too hot, it will not help the kidney to collect, but will make people more excited, thus increasing the consumption of kidney essence; If the water is too cold and cold, the meridians will be blocked, and the cold will enter the abdomen along the meridians, and its harm is self-evident.
These two conditions can cause acute renal failure.
1. excessive exercise. Men Wenjin, Deputy Chief Physician, Department of Nephrology, beijing jishuitan hospital: Excessive exercise may lead to acute renal failure. This is because sudden strenuous exercise is likely to cause muscle injury, which will lead to rhabdomyolysis, and then lead to the increase of myoglobin. Myosin itself will also be decomposed into nephrotoxic components in the body, which will cause further damage to renal tubules and lead to acute renal failure.
The common causes of soy sauce color are rhabdomyolysis and urinary system infection. It is normal to cause muscle damage during exercise, but excessive exercise causes rhabdomyolysis, myoglobin in cells enters the blood, and urine will show an abnormal dark brown color. Myoglobin is dissolved too much, which can not be discharged quickly, causing blockage in the kidney, which will lead to acute renal failure.
2. High voltage electric shock. Dr. Wang Bo, Emergency Department of Changping District Hospital, Beijing: High-voltage electric injuries often burn large areas of muscles, even involving bones, with large fluid loss, which is more prone to shock than general thermal burns. In addition, a large amount of hemoglobin and myoglobin are released, resulting in severe hemoglobinuria and myoglobinuria, which will lead to acute renal failure. Severe acute renal failure often requires hemodialysis according to the condition.
Eight signals indicate that the kidney is ill.
Lun Lide, Director of Nephrology Department of Air Force General Hospital: 1. Eyelid or lower limb edema: The kidney will lead to the impairment of water and electrolyte regulation function, causing the increase of water and sodium in the body, and water often accumulates in the loosest tissue or the lowest part of the body, such as eyelids or lower limbs.
2. Headache, fatigue, memory loss, poor sleep: Nephropathy is characterized by headache, fatigue, memory loss, poor sleep, etc., mostly caused by hypertension, especially young people who have unexplained blood pressure rise should be alert to kidney diseases.
3. Foamed urine: When the protein and urine sugar in urine increase, foamed urine can appear, and there is a fine foam floating on the surface of urine, which is not easy to disappear. You should be alert to proteinuria; If the bubble is large and disappears very quickly, we should be alert to whether the urine sugar rises.
4. Changes in urine volume: Normal people’s metabolism is slow after falling asleep, and nocturia is significantly less than that during the day. They should not urinate at night or only pass once, and the nocturia is about 1/4 ~ 1/3 of the total amount in 24 hours. If it is often more than 2 times, nocturia is more than that during the day, which may indicate renal insufficiency.
5. Abnormal urine test: If protein or occult blood is positive in routine urine test, it may be asymptomatic proteinuria or asymptomatic hematuria, and urine protein quantification or urine phase microscopy should be done in time.
6. Complications with other diseases: Many diseases are prone to kidney damage, such as hypertension, diabetes, gout and polycystic kidney disease. Patients with these diseases should have regular urine tests.
7. Anemia: Patients with chronic renal insufficiency above moderate degree often have anemia, fatigue, dizziness, pallor and other symptoms, which is often caused by renal insufficiency leading to decreased secretion of erythropoietin by the kidney. Therefore, in the case of unexplained anemia, besides considering blood system diseases, we should check whether there is kidney disease.
8. Loss of appetite: Patients with early uremia often have symptoms such as loss of appetite, nausea and itchy skin. Therefore, patients with these symptoms, especially those with hypertension and anemia, must check their renal function.
What needs to be emphasized here is that low back pain is not necessarily kidney disease. Low back pain, which people often say, refers to the pain of the whole back and even the lumbosacral part. There is no sensory nerve distribution in the renal parenchyma, so it is painless, and the pain in the renal area that patients feel is mostly caused by the involvement of renal capsule, ureter and renal pelvis. Some patients with nephritis and nephrotic syndrome only have slight discomfort in the waist and feel sore, and rarely have obvious low back pain. (People’s Health Network is integrated from Life Times and Health Times)
