Kidney artery

Kidney artery's disease overview

Renal artery stenosis (English name is Renal Artery Stenosis) is a narrowing of one or more arteries carrying blood to the kidneys (also known as the kidney artery) leading to preventing The amount of blood rich in normal oxygen to the kidneys. The kidney needs adequate blood flow to help filter waste and remove excess liquid. A decreased blood flow may increase blood pressure throughout the body (systemic blood pressure or hypertension) and damage kidney tissue.

Causes of Kidney artery's disease

The two main causes of renal artery stenosis include:

  • Kidney atherosclerosis. Atherosclerosis is the accumulation of fat, cholesterol and other substances (plaque) in and on the artery wall of the patient. As the accumulation is growing, the artery can harden, reduce blood flow and cause kidney scars. Finally, leading to artery stenosis can lead to. Most cases of kidney artery stenosis occur due to atherosclerosis.
  • Mechanical dysplasia. In muscle dysplasia, muscles in the artery wall of abnormal development. The kidney artery may have narrow parts alternating with wider parts, creating a shape like the image of the artery. The kidney artery can be narrowed that the kidneys do not receive adequate blood supply and may be damaged. This can happen in one or both kidneys. Experts do not know the cause of muscle dysplasia, but this condition is more common in women and may be congenital. 

    • Atherosclerosis and muscle fibroids can affect other arteries in the body as well as renal arteries and cause complications. 

    Rarely, renal artery stenosis due to other conditions such as vasculitis, nervous system disorders make tumors grow on nerve tissue (neurofibromatosis).

    Symptoms of Kidney artery's disease

    Kidney artery stenosis may have no signs or symptoms until the disease progresses. Most people with renal artery stenosis do not have any signs and symptoms that patients can recognize. Sometimes it is only accidentally discovered during the test because of other medical examination. The doctor may also doubt if the patient has:

  • High blood pressure begins suddenly or worsened without the cause
  • High blood pressure begins before the age of 30 or after 50 years old

    • When renal artery stenosis progresses, other signs and symptoms may include:

  • High blood pressure is difficult to treat
  • Diagnosis of kidney artery stenosis by hearing sound blowing in the abdomen when blood flows through a narrow artery, which can cause a blow; You can place a stethoscope on the front or side of the abdomen to hear this sound

    • Increasing protein concentration in urine or other signs of abnormal kidney function

  • Demonstrate kidney function during the treatment of high blood pressure
  • Overload of liquid and patients with edema
  • Anti -treatment heart failure

    • The possible complications of renal artery stenosis include:

  • High blood pressure

    • Renal failure, patients need to be treated with dialysis or kidney transplant

  • edema on the legs, causing swelling of the ankles or feet
  • Difficulty breathing due to sudden accumulation of liquids in the lungs causes acute pulmonary edema

    • Transmission route of Kidney artery's diseaseKidney artery

    Hẹp động mạch thận không phải là bệnh truyền nhiễm, do đó không có khả năng lây truyền từ người bệnh sang người khỏe mạnh. 

    People at risk for Kidney artery's disease

    Most cases of kidney artery stenosis are caused by atherosclerosis. The risk factors for atherosclerosis of the kidney are the same as for atherosclerosis anywhere else in the body, including:

  • aging
  • High blood pressure

    • High cholesterol

    diabetes

    obesity

  • Smoking and using tobacco in other forms

    • Family history of cardiovascular disease early less exercise

    Prevention of Kidney artery's disease

  • Maintain healthy weight. When weight is increased, blood pressure is the same, so if overweight, even 4.5kg can help reduce blood pressure.
  • Restrict salt in a diet due to salt and salty food that makes the body hold water. This can increase blood volume and lead to hypertension.
  • Strengthen exercise. Regular physical activity can help lose weight, reduce the risk of heart disease, reduce cholesterol and reduce blood pressure. Check with the doctor before starting a exercise plan, especially if the patient has high blood pressure and has never been exercise in the past.
  • Reduce stress. Stress can temporarily increase blood pressure, however, this increase varies, depending on the level of stress face to face and how the body's body reacts with it.
  • Drinking alcohol in moderation, if any. If drinking too much alcohol can increase blood pressure.
  • No smoking. Tobacco damages blood vessel walls and increases the speed of arteriosclerosis. If smoking, please support from the doctor to help quit smoking.

    • Diagnostic measures for Kidney artery's disease

    For diagnosis of kidney stenosis, the doctor can start with:

  • The doctor uses a stethoscope to listen to the kidney areas to find the sound that may mean that the arteries to the kidneys are narrowed
  • Asked about the current and current symptoms. History of disease
  • blood and urine tests to test kidney function
  • blood and urine tests to measure blood pressure regulating hormone levels
    • Li> Diagnostics are usually performed to diagnose renal artery stenosis including:

    Doppler ultrasound. High frequency sound waves help doctors see arteries and kidneys and check function. This technique also helps the doctor find obstruction in blood vessels and measure the level of congestion and their severity.

    Computerized tomography (CT). During the CT scan, the X-ray linked to the computer will create a detailed image that shows the cross-sectional image of the kidney artery. Patients can be injected with contrast drugs to show blood flow.

    Magnetic resonance adoption (MRA). MRA uses radio waves and strong magnetic fields to create a 3 -dimensional image of the kidney and kidney artery. 

    Age aortic angiography. This special X-ray technique helps the doctor find the congestion in renal arteries and sometimes open the narrow part with a ball and stent. Before X-ray, the doctor will inject contrast drugs into the renal artery through a long, thin tubular to check the arteries and show that the blood flow has been connected. 

    Kidney artery's disease treatments

    Refereming kidney stenosis may be related to lifestyle, medicine or technical changes. Sometimes doctors can combine treatments to treat a sick person. Depending on the health and overall symptoms of the patient, the doctor can take the following treatment measures:

    Lifestyle changes

    If the blood pressure increases moderately or seriously, the patient may need to make some lifestyle changes, such as:

  • Maintain a reasonable weight or lose weight if the patient is overweight
  • Eating healthy foods

    • Limit salt in diet

  • Enhancing physical activity
  • Reduce the level of stress in life
  • drinking alcohol or drinks containing caffeine at a moderate level
  • No smoking
    • Drugs

    High blood pressure, even if it is mainly related to kidney stenosis, can be successfully treated with drugs. Using the right drug or combining drugs may require time and perseverance. There are many drugs to treat renal artery stenosis, but if atherosclerosis is a basic cause of kidney artery stenosis, the doctor may also recommend aspirin and cholesterol -reducing drugs. The best drugs depend on the condition of each specific patient.

    Surgery

    For some people - For example, people with high blood pressure are uncontrollable and complications such as pulmonary edema or weakening kidney function, some techniques have It is recommended to restore blood flow through the renal artery and improve blood flow to the kidneys.

    The techniques for treating kidney artery stenosis may include:

  • Renal blood vessels and kidney artery stent . In this technique, doctors expand the kidney artery narrowed and place a device inside the blood vessel to hold the walls of the open vessels and allow better blood flow.
  • Surgery in the cycle of kidney artery. In this technique, doctors graft a replacement of blood vessels into the kidney artery to create a new route for blood to the kidneys. Often the doctor will connect the kidney artery to a circuit from another place such as the liver or the spleen.

    • Recent results from clinical trials that compare coronary heater and drugs with drugs do not show the difference between two treatments for reducing blood pressure and reclaiming. Kidney function for patients with medium renal artery stenosis. 

    See also:

  • Where is the kidney and how?
  • Instructions to prevent kidney complications in diabetes patients
  • Radioma

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