The principle of hemodialysis

Hemodialysis helps the body to eliminate toxins, water and salt from the body when the function of the kidneys is impaired and this task cannot be performed. Hemodialysis is a way to treat kidney failure, so that you can continue to live in a normal way.

1. What is dialysis?

Dialysis is a treatment that takes care of the function of the kidneys if those muscles are deactived or the function is impaired. There are two methods of dialysis including:

  • Hemodialysis: Your blood is passed through a filter outside the body, cleaned and then inserted into your body. This is done at a dialysis facility or at home.
  • Pericarditis: Your blood is cleaned inside the body. Use the patient's own peri membrane as an alternative membrane to the weakened kidney. A special liquid is inserted into your abdomen to absorb waste from the blood passing through small vessels in your abdominal cavity. The liquid is then stored away. This type of dialysis is usually carried out at home.


Dialysis helps patients receive kidney failure to prolong life

2. Why is hemodialysis required?

Your doctor will determine when you should perform hemodialysis based on a number of factors including:

  • General Health
  • Renal function
  • Signs and symptoms
  • Quality of life
  • Self-desire

You may notice signs and symptoms of renal failure (blood ure), such as nausea, vomiting, swelling or fatigue. Your doctor uses an estimated level of dialysis (eGFR) to measure your kidney function level. Your EGFR is calculated by blood creatinine test results, gender, age and other factors. A normal value may vary with age. This measure helps determine renal function in order to plan appropriate treatment for patients with renal impairment, including at the beginning of hemodialysis.

Hemodialysis can help your body control blood pressure and maintain a reasonable balance of fluids and various minerals – such as potassium and sodium – in your body. Typically, hemodialysis is in place when your kidneys stop working to the point of causing life-threatening complications.

Common causes of renal failure include:

  • Diabetes
  • High blood pressure (hypertension)
  • Renal inflammation (angulitis)
  • Vascular inflammation (vascular inflammation)
  • Renal cyst (polycystic kidney disease)

However, your kidneys may stop working suddenly (emergency kidney injury) after severe illness, complex surgery, heart attack or other serious problems. Some medications can also cause kidney damage.

Some people with prolonged severe (chronic) renal failure may opt for a different treatment, opting for maximum medical therapy, also known as maximum conservation management (MCM), rather than opting for dialysis. This therapy includes controlling for complications of advanced chronic kidney disease, such as waste overload, high blood pressure and anemia, focusing on symptom control in order to reduce their impact on quality of life.

In some cases, a kidney transplant may be performed instead of dialysis. Your doctor will rely on your medical condition and a number of other factors to give you advice on the most appropriate method. This is a personal decision for the sake of dialysis that can bring different results, depending on your specific health problems.


Diabetes is a cause of kidney failure

3. Hemodialysis Mechanism

Before performing hemodialysis, the patient will undergo intravenous artery surgery to increase blood circulation to the dialysis machine and flow from the machine back to the body.

Preparations for hemodialysis patients will begin from several weeks until several months before the first dialysis procedure. For easy access to the patient's blood, the doctor will create a hole to reach the blood vessels. This is where blood is removed for hemodialysis and then returned to the body. The operation takes time for the patient to fully recover before starting treatment with hemodialysis. There are three methods used, including:

  • Arterial hole: Surgery creates an AV fistula to make a connection between the artery and the vein, usually in your arm less frequently used. This method is chosen by many people because of its effectiveness and safety. An artery and vein are connected under the skin in your arm. An AV fistula takes about 6 weeks or more to recover before it can be used for hemodialysis. After that, it is possible to use this fistula for many years.
  • AV transplant: If your blood vessels are too small to form an AV fistula, the surgeon will opt for the alternative method of creating a path between the artery and the vein using a synthetic plastic tube or Av graft. A plastic tube is used to connect the arteries and veins under your skin. The patient will recover after 2 weeks of performing this surgical procedure, so you can start hemodialysis earlier. This will not last as long as the surgery creates a fistula. You will probably need another piece of the puzzle after a few years. The risk of infection is higher when performing this method.. You will also have to see your doctor more often to be able to make sure that the piece remains open.
  • Central vein cathethetic: If you need emergency hemodialysis, a plastic tube (cathethetic) can be inserted into a large vein in the neck or near the groin. This cathee is temporary. A cathetic is placed in a vein in the neck, below the collarbone or next to your groin. This cathethe tube is used only for a short time.

During hemodialysis, you will sit or lie on your back on a chair. A technician will place two needles in your arm where the fistula or piece is located. A pump in an hemodialysis machine will slowly draw your blood, then send it through another machine called a dialysis machine. This acts as a kidney and filters more salt, waste and liquid. Your cleaned blood will be brought back into your body through the second needle in your arm. Or, if there is a cathety, blood flows from one gate and is then brought back through the second gate.

You can have hemodialysis in hospitals, dialysis treatment centers or at home. If you perform one-center dialysis, each hemodialysis will last from 3 to 5 hours and you will only need to do it three times a week. If you have hemodialysis at home, you will need treatment 6 or 7 days in 1 week, and each implementation lasts from 2-3 hours .

Some people can read newspapers or watch TV during treatment. If you choose to perform hemodialysis at home, you can do it at night while you sleep.

To achieve the best results from hemodialysis, you should note:

  • Eat the right food. Eating properly can improve the results of your hemodialysis and overall health. While you are on hemodialysis, you will need to carefully monitor the amount of liquid, protein, sodium, potassium and phosphorus. A dietitian can help you plan individual meals based on weight, personal preferences, remaining kidney function and other medical conditions, such as diabetes or high blood pressure.
  • Take medicines as prescribed. Carefully follow instructions from your treating doctor
  • If you have any problems, you should consult your doctor, such as feeling uncomfortable or showing some abnormal symptoms.

To register for examination and treatment at Share99 International Health Hub, you can contact Share99 Health System nationwide, or register for an online examination HERE.

Article reference source:,


  • Hemodialysis: Things to Know
  • Dialysis in dialysis is insular
  • Pericard pericarditis for people with kidney failure: What to know

  • Dialysis, Dialysis: Things to Know
  • Causes of septic shock
  • Dr Share99 Da Nang creates deep trust with patients

About: Minh Quynh

b1ffdb54307529964874ff53a5c5de33?s=90&d=identicon&r=gI am the author of I had been working in Vinmec International General Hospital for over 10 years. I dedicate my passion on every post in this site.


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