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Blood Purification – Procedures, Uses and Effects

Blood purification refers to medical procedures that remove harmful substances, toxins, or pathological components from the blood. Common applications include kidney failure and poisoning.

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Things worth knowing about "Blood Purification"

Blood purification refers to medical procedures that remove harmful substances, toxins, or pathological components from the blood. Common applications include kidney failure and poisoning.

What is Blood Purification?

Blood purification is a collective term for medical procedures that remove harmful, excess, or pathological substances from the blood. These substances can include metabolic waste products, toxins, excess minerals, or disease-causing components such as certain antibodies or lipids. In clinical practice, these methods are often referred to as extracorporeal blood purification, since the blood is treated outside of the body.

In everyday language, the term blood purification is also widely used in the context of alternative or naturopathic concepts that promise detoxification of the body through specific foods, herbal teas, or fasting programs. From a conventional medical perspective, however, the kidneys, liver, lungs, and skin continuously and effectively perform these purification functions in a healthy organism.

Medical Blood Purification Procedures

Hemodialysis

Hemodialysis is the most well-known blood purification procedure and is used in cases of chronic or acute kidney failure. Blood is channeled through a dialysis machine via an access point (usually in the arm), where it passes through a semipermeable membrane that filters out waste products such as urea and creatinine. The cleaned blood is then returned to the body. Treatment typically lasts three to five hours and is performed several times per week.

Peritoneal Dialysis

In peritoneal dialysis, the lining of the abdominal cavity (the peritoneum) is used as a natural filter membrane. A special cleansing solution is introduced into the abdominal cavity through a catheter, absorbs waste products from the blood, and is then drained away. This procedure is often performed at home and offers greater flexibility in daily life.

Plasmapheresis

Plasmapheresis is a procedure in which the liquid component of blood (plasma) is separated and replaced with donor plasma or a substitute solution. It is used when harmful antibodies or immune complexes are present in the blood, for example in autoimmune diseases such as Guillain-Barre syndrome or myasthenia gravis.

Hemoperfusion

In hemoperfusion, blood is passed through an adsorption system that selectively binds and removes certain substances such as drugs or toxins. This procedure is primarily used in cases of acute poisoning.

LDL Apheresis

LDL apheresis is a specialized blood purification technique designed to lower elevated LDL cholesterol levels in the blood. It is used when familial hypercholesterolemia cannot be adequately managed with medication alone and the risk of heart attack is high.

Clinical Applications

Chronic kidney failure (end-stage renal disease)
Acute kidney injury (e.g., caused by sepsis or medications)
Autoimmune diseases (e.g., myasthenia gravis, Guillain-Barre syndrome)
Poisoning (e.g., from medications or environmental toxins)
Familial hypercholesterolemia
Liver failure (specialized liver support systems such as MARS)

Blood Purification in Naturopathy

In naturopathy and folk medicine, the concept of blood purification is often associated with detox programs intended to rid the body of waste or toxins. Common approaches include nettle tea, dandelion, fasting, or specialized dietary supplements. While some of these plants may have documented beneficial effects on liver or kidney function, the term blood purification in this context lacks a clear scientific definition. In healthy individuals, the liver and kidneys continuously and effectively cleanse the blood without requiring additional support.

Important Notes

If you suffer from a condition that may require medical blood purification, a proper medical diagnosis and treatment are essential. Self-treatment or alternative approaches are not a substitute for medically necessary therapy. Please consult your doctor to determine the most appropriate procedure for your situation.

References

Kidney Disease: Improving Global Outcomes (KDIGO) - Clinical Practice Guideline for Acute Kidney Injury (2012). Available at: https://kdigo.org
National Kidney Foundation - KDOQI Clinical Practice Guidelines for Hemodialysis Adequacy (2015). Available at: https://www.kidney.org
Ronco C. et al. - Blood Purification in Intensive Care. Contributions to Nephrology, Karger Publishers, Basel.

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