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Thermal Ablation and Radiofrequency Ablation | Doctors & Treatment Information

Thermal ablation is a minimally invasive pain treatment for chronic pain. Thermal ablation is also known as radiofrequency ablation. In this procedure, doctors use heat to ablate sensory nerve fibers. This interrupts the transmission of pain signals.

Further information on thermolesion is provided below.

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Thermal Ablation / Radiofrequency Ablation - Further Information

What is a thermal ablation or radiofrequency ablation?

Thermal ablation is a minimally invasive therapeutic procedure for treating pain, also known as radiofrequency ablation.

It involves the ablation of sensory nerve fibers through heat treatment. This interrupts the transmission of pain signals. The patient benefits from rapid pain relief.

A thermal or radiofrequency ablation is also suitable for treating spondylogenic pain (spondylosis). This refers to symptoms that originate not from the nerve roots but from the small joints of the spine (facet joints).

Man with back painFor patients suffering from severe chronic back pain, thermal ablation can provide significant relief @ BigBlueStudio /AdobeStock

The pain is usually caused by dysfunction or wear and tear. A thermal ablation is performed when other treatment methods, such as medication or massage, have proven ineffective.

Radiofrequency ablation is a form of interventional pain therapy. Its goal is to interrupt or alter the transmission of pain signals within the pain pathways.

Reducing the transmission of pain signals allows the body to heal itself.

The treatment consists of:

  • Targeted nerve treatments
  • Electrostimulation
  • Administration of local anesthetics into the spinal cord

Between 60 and 80 percent of all patients experienced an improvement in their symptoms following treatment.

How does thermolesion or radiofrequency ablation work?

For thermal ablation, doctors use high-frequency current, which has long been employed in high-frequency surgery. High-frequency current causes shifts in electrolytes.

The movement of ions causes the electrodes—which the doctor has previously placed near the tissue—to heat up. This results in the coagulation of cellular proteins. The increase in current and the resulting vapor pressure cause the cell walls to burst.

During radiofrequency ablation, the physician inserts a special cannula toward the nerve under X-ray guidance.

After inserting a thermal probe into the cannula, the correct position of its tip is determined using electrical stimulation. High-frequency alternating current (485 kHz) is then applied.

Watch the radiofrequency ablation procedure in the video:

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An intense electromagnetic field forms near the tip of the probe, causing the molecules to vibrate. This heats the tissue within a radius of several millimeters. 

As the sensitive nerve fibers in the tissue coagulate, this results in their selective destruction. This, in turn, prevents the transmission of pain.

The ablation temperatures range from 60 to 80 degrees Celsius. The outpatient procedure takes approximately 15 to 30 minutes.

When is thermolesion or radiofrequency ablation used?

Thermal ablation can be used for the following indications: