Electrosurgical (RF) medical instruments for cutting and coagulating tissue

An electrosurgical device, comprising:

• an end effector comprising:
• a first electrode;
• a second electrode movable from a first position to a second position when a force is applied to the end effector;
• and
• a channel within which a moveable member is configured to slide to open and close an upper jaw and a lower jaw,
• wherein the first electrode and the second electrode define a treatment area when the second electrode is in the second position;
• and
• a base cap configured to interface with the end effector, the base cap comprising:
• an electrode layer configured to provide electrosurgical signals to a tissue section in contact with the base cap, the electrode layer comprising a direct contact metal electrode configured for direct application of electrosurgical energy to the tissue section;
• a heat sink layer configured to prevent heat transfer between the base cap and the end effector;
• a sealing layer configured to seal the base cap;
• at least one molded hook configured to interface with at least one overhang formed on the lower jaw of the end effector;
• and
• a flex circuit deposited on the sealing layer,
• wherein the electrode layer is connected to a source and return path through the flex circuit,
• wherein the heat sink layer is arranged between the electrode layer and the end effector when the base cap interfaces with the end effector,
• wherein the base cap is configured to cover an entire portion of the channel to protect the channel from debris and fouling during the direct application of electrosurgical energy to the tissue section.