Radiofrequency scalpel and system

A radiofrequency scalpel, comprising:

• a blade and a handle, wherein
• the blade comprises:
• an outer blade, an inner blade, and a sheath;
• a distal end of the outer blade is located at a distal end of the blade, the distal end of the blade being an end of the blade far away from the handle, and the distal end of the outer blade being an end of the outer blade far away from the handle;
• the outer blade, the inner blade, and the sheath are coaxial;
• the inner blade and the sheath are separately connected to the handle, and a distal end of the sheath is fixedly connected to the outer blade;
• the distal end of the sheath is an end of the sheath far away from the handle;
• the sheath is provided with a sheath groove at the distal end;
• a distal end of the inner blade penetrates through the sheath, the inner blade and the sheath are configured to be capable of moving relatively in an axial direction, and during relative moving, the distal end of the inner blade is capable of entering the sheath groove;
• the inner blade comprises:
• an electrode, the electrode being connected to a radiofrequency generation apparatus;
• the electrode covers a part or all of a cross section of the distal end of the inner blade;
• and
• the interior of the inner blade or an inner channel of the inner blade is configured to be connectable to a negative pressure apparatus.

A radiofrequency scalpel, comprising:

• a blade and a handle, wherein
• the blade comprises:
• an outer blade, an inner blade, and a sheath;
• a distal end of the outer blade is located at a distal end of the blade, the distal end of the blade being an end of the blade far away from the handle, and the distal end of the outer blade being an end of the outer blade far away from the handle;
• the outer blade, the inner blade, and the sheath are coaxial;
• the inner blade and the sheath are separately connected to the handle, and a distal end of the sheath is fixedly connected to the outer blade;
• the distal end of the sheath is an end of the sheath far away from the handle;
• a distal end of the inner blade penetrates through the sheath;
• the inner blade is provided with an inner blade groove at the distal end, and the sheath is provided with a sheath groove at the distal end;
• the inner blade comprises:
• an electrode, the electrode is connected to a radiofrequency generation apparatus, the electrode covers a non-radial cross-sectional groove edge or a part of a non-radial cross-sectional groove edge of the inner blade groove, and the non-radial cross-sectional groove edge is a groove edge that is not located in a radial cross section of the inner blade;
• the inner blade and the outer blade are configured to be capable of rotating relatively around a central axis of the blade, and during relative rotating, the electrode is capable of entering the sheath groove;
• and
• the interior of the inner blade or an inner channel of the inner blade is configured to be connectable to a negative pressure apparatus.