A compact medical device for tissue welding is provided. The hand-held plasma heads are configured for deep cuts and long cuts. A bio-compatible liquid capable of solidifying in response to application of plasma, such as an albumin solution, is applied to the wound. Plasma created from a gas such as helium is then applied to said bio-compatible liquid to solidify it and seal the wound. An additional polymerizing gas may also be applied. A feedback mechanism may maintain the temperature of said plasma. A wiper fort removal of excess liquid may also be provided.組織を溶接する小型医療装置が提供される。ハンドヘルドプラズマヘッドが、深い切開及び長い切開用に構成される。【選択図】図1