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Table 1 Monopoloar versus Coblation Settings

From: The history of radiofrequency energy and Coblation in arthroscopy: a current concepts review of its application in chondroplasty of the knee

Conditions used during Cartilage debridement MONOPOLAR (and most conventional BIPOLAR devices) COBLATION (plasma based radiofrequency)
Temperature > 75 °C (will cause chondrocyte death) 25–35 °C (*)
Electrical Current path Directly passes through tissue:
- Monopolar: to a ground plate
- Bipolar: from active to return electrode
Not passing directly through tissue: electrical current generates plasma that in turn transfers energy to contact tissue
Voltage setting 300–9000 V 100–350 V (LO mode for cartilage)
Radiofrequency range 0.25–2.5 MHz 100–500 kHz
Contact pressure Direct contact with tissue No contact: 1–2 mm away from tissue
Contact time Short applications Brush technique reduces likelihood of extended contact
  1. (*) The Ambient wands also feature a fluid temperature alarm triggered at 45 °C