Five Metastases Microwave Ablation

Microwave ablation
Microwave ablation is a technique for heating and killing cancer cells using high-frequency microwave energy. It's a treatment for certain types of big lung cancer. It has the ability to eliminate a tumour that is obstructing the airway. This makes it easier for you to breathe. Ablation is a treatment for liver tumours that kills them without removing them. When surgery is not an option, these procedures can be employed in patients with a few tiny tumours (often because of poor health or reduced liver function). In most cases, hepatic percutaneous microwave ablation (MWA) is conducted under conscious sedation. Despite this, numerous patients complained of discomfort throughout the operation.

How long does it take to ablate a tumour?

The needle warms the tumour, causing it to die. This can take a long time. It could take anywhere from 30 minutes to several hours to complete.

Radiofrequency ablation (RFA) and microwave ablation (MWA) both employ radio waves to burn and eliminate neuroendocrine tumour (NET) cells in the liver. RFA or MWA is performed using a probe (electrode) that is inserted into the tumour through your skin. The distribution of microwave (MW) energy is more complicated than that of radiofrequency (RF) energy. Wavelengths, which are more cumbersome than the tiny wires used to feed energy to RF electrodes and are prone to overheating when transporting a high quantity of power, are used to carry MW energy. As a result, MWA appears to be less practical than RFA in the treatment of subcapsular and high-risk tumours. Furthermore, MWA is more costly than RFA. When opposed to surgical resection, alternative therapies cause less damage to healthy tissue. This is a critical characteristic for individuals with underlying cirrhosis or steatohepatitis as a result of extended chemotherapy exposure, as well as those who have had a previous hepatectomy and are experiencing liver tumour growth.

Ablation by Microwave

MWA uses high-frequency waves, which are comparable to radiofrequency but operate at a significantly greater frequency range of 900 MHz to 2.4 GHz. These high-frequency waves induce water molecules to oscillate, causing friction, heat, and tissue damage similar to RFA through coagulation necrosis. MWA has at least some potential advantages to RFA, such as lesser susceptibility to the "heat-sink" phenomena and lower heat dissipation due to charring, allowing for larger areas of ablation in a shorter time. When compared to other thermal ablation modalities, MWA is thought to be more efficient in the treatment of bigger lesions and targets located near major vessels for these reasons.  

Evaluation of imaging

A computed tomography (CT) scan of the chest, abdomen, and pelvis, magnetic resonance imaging (MRI), and/or positron emission tomography (PET) CT were used to examine tumours prior to surgery. Intraoperative ultrasound was used to locate and confirm lesions as well as aid in surgical planning. Radiofrequency neurotomy is not a long-term solution to back or neck discomfort. The results of studies on the effectiveness of treatment have been mixed. Some people may have just minor pain alleviation, while others may feel better for months. Sometimes the treatment has no effect on pain or function.

Is RF ablation a painful procedure?

It's not uncommon to have some soreness, a burning sensation, or hypersensitivity in the procedure area. Some patients compare the sensation to that of a sunburn. This soreness usually lasts between 1 and 2 weeks after the operation. Hyperthermic treatments such as radiofrequency ablation (RFA), microwave ablation (MWA), high-intensity focused ultrasound, and laser therapy employs energy to heat the tissue to at least 60°C for best efficacy, whereas cryoablation uses energy to cool the tissue to less than 40°C to cause necrosis.

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