Abstract: A device 10, typically hand-held, provides a flow of partially ionized gaseous plasma for treatment of a treatment region. The device comprises an applicator head 52 housing a miniature plasma cell 16 in which gas flowing through the cell from a gas source 22 can be energized to form a non-thermal gaseous plasma, and a plurality of electrodes 26, 28 for receiving electrical energy from a source of electrical energy for energizing gas in a plasma forming region 18 in the cell to form said plasma. The applicator head 52 is detachable from the device and may be of a size and configuration to enable it to be inserted into the oral cavity of a human or animal.

Abstract: The present invention provides a hand-held device 10 for providing a flow of plasma for treatment of a treatment region. The device comprises a plasma cell 16 defining a volume in which gas passing through a cell inlet from a gas source 22 can be energised to form a plasma and discharged through a cell outlet for treatment of a treatment region by said generated plasma, and a plurality of electrodes for receiving electrical power for energising gas in the cell to form a plasma, wherein the device comprises a valve arrangement 32 operable in an open condition to allow the discharge of plasma from the device to the treatment region and in a closed condition to resist the passage of ambient contaminants into the device in the absence of gas flow through the device from the gas source.

Abstract: A device 10, typically hand-held, provides a flow of partially ionised gaseous plasma for treatment of a treatment region. The device comprises an applicator head 52 housing a miniature plasma cell 16 in which gas flowing through the cell from a gas source 22 can be energised to form a non-thermal gaseous plasma, and a plurality of electrodes 26, 28 for receiving electrical energy from a source of electrical energy for energising gas in a plasma forming region 18 in the cell to form said plasma. The applicator head 52 is detachable from the device and may be of a size and configuration to enable it to be inserted into the oral cavity of a human or animal.