Principle: Coblation uses low temperature radio frequency during the operation, which was found to cause less pain for the patient. It uses an oscillating electric current to disrupt the surrounding tissue.
The plasma field has a radius of about 100μm-200μm around the electrodes and is kept stable within the head of the coblation wand by the continuous supply of saline. Plasma does not have a thermal effect on tissue. It only affects it on a chemical level. The plasma field produces positively charged hydrogen ions (H+) and negatively charged hydroxide ions (OH-), which enable plasma to destroy tissue.
The temperature for coblation ranged from 60 °C to 70 °C, while in other operation procedures, such as electrosurgery require temperatures ranging from 400 °C to 600 °C, which is much higher. Thus, coblation is considered to be a non-heat focused medical procedure that is much better at causing minimal thermal damage to untargeted tissues near the targeted area. It also helps in hemostasis by coagulation option.
- Requires less surgical time for the procedure to be completed.
- Largely minimizes thermal damage which occurs to surrounding tissue during the procedure compared to the traditional method. For example, the healing of the tonsillar fossa is much faster when this low temperature technology is used instead of a heat based technology, such as electrocautery
- Faster recovery of the patient after surgery.
- Less operative pain as no incision is required to perform the procedure.
Indications in ENT:
- Tonsillectomy and Adenoidectomy.
- Inferior turbinoplasty.
- Resection of nasal polyposis.
- Resection of nasal and anterior skull base tumors (e.g. angiofibromas)
- Tongue base reduction.
- Excision of anterior and posterior glottic webs.
- Excision of arytenoid granulomata.
- Posterior cordotomy.
- Excision of Internal laryngoceles.
- Excision of laryngeal papillomatosis.
- Excision of laryngeal granulomata.
- Excision of Subglottic and tracheal stenosis.
- Resection of oropharyngeal malignancy.