Electrosurgical device
Example electrosurgical devices and systems are disclosed. An example electrosurgical device includes a body, an electrosurgical electrode secured to the body, the electrosurgical electrode including a distal tip. The electrosurgical device also includes a shroud translatable relative to the electrosurgical electrode between a first position and a second position, a first magnetic component which is operably connected to the body, and a second magnetic component which is operably connected to the shroud, wherein the first and second magnetic components magnetically interact to releasably maintain the shroud in the first position.
1 . An electrocautery pencil, comprising:
a body;
a non-movable monopolar electrocautery electrode fixedly secured to the body, the non-moveable monopolar electrocautery electrode including a distal tip;
a heat shroud defining an internal lumen and a distal end, the heat shroud being translatable relative to the non-moveable monopolar electrocautery electrode between a first position wherein the distal tip of the non-movable monopolar electrocautery electrode is disposed entirely within the internal lumen and proximal to the distal end of the heat shroud, and a second position wherein the distal tip of the non-moveable monopolar electrocautery electrode is disposed distal to the distal end of the heat shroud, and wherein the heat shroud is constructed of a heat-resistant material configured to shield the distal tip of the non-movable monopolar electrocautery electrode when in the first position;
a first electromagnet which is operably connected to the body;
a second electromagnet which is operably connected to the body;
a permanent magnet disposed between the first and second electromagnets and operably connected to the heat shroud;
wherein the first electromagnet and the permanent magnet magnetically interact to releasably maintain the heat shroud in the first position;
wherein the second electromagnet and the permanent magnet magnetically interact to releasably maintain the heat shroud in the second position;
wherein the permanent magnet is configured to shift between the first electromagnet and the second electromagnet in response to an electrical current being applied to the first electromagnet, the second electromagnet or both the first electromagnet and the second electromagnet;
wherein the first electromagnet is free of the electrical current when the permanent magnet and the first electromagnet magnetically interact to releasably maintain the heat shroud in the first position;
wherein the second electromagnet is free of the electrical current when the permanent magnet and the second electromagnet magnetically interact to releasably maintain the heat shroud in the second position; and
a multi-function control actuator coupled to the body, wherein actuating the multi-function control actuator to a first configuration translates the heat shroud from the first position to the second position, wherein actuating the multi-function control actuator to a second configuration energizes the non-movable monopolar electrocautery electrode, and wherein releasing the multi-function control actuator translates the heat shroud from the second position to the first position.
2 . The electrocautery pencil of claim 1 , wherein the first electromagnet includes a first core of magnetic material surrounded by a first coil through which an electric current is passed to magnetize the first core, wherein the first core and first coil are positionally fixed relative to one another.
3 . The electrocautery pencil of claim 2 , wherein the second electromagnet includes a second core of magnetic material surrounded by a second coil through which an electric current is passed to magnetize the second core, wherein the second core and second coil are positionally fixed relative to one another.
4 . The electrocautery pencil of claim 1 , further comprising an electrical component coupled to the first electromagnet and the second electromagnet;
wherein the electrical component is configured to permit an electrical current to flow to the first electromagnet, the second electromagnet or both the first electromagnet and the second electromagnet for a momentary time period;
wherein the electrical current is configured to energize the first electromagnet, the second electromagnet or both the first electromagnet and the second electromagnet during the momentary time period;
wherein energizing the first electromagnet, the second electromagnet or both the first electromagnet and the second electromagnet shifts the permanent magnet between the first electromagnet and the second electromagnet.
5 . The electrocautery pencil of claim 4 , wherein shifting the permanent magnet between the first electromagnet and the second electromagnet shifts the heat shroud between the first position and the second position.
6 . The electrocautery pencil of claim 4 , wherein the electrical component is a circuit board.
7 . The electrocautery pencil of claim 1 , wherein the multi-function control actuator includes a first multi-stage actuation button and a second multi-stage actuation button.
8 . The electrocautery pencil of claim 7 , wherein the first multi-stage actuation button is configured to actuate between a first depressed position and a second depressed position different from the first depressed position, and wherein actuating the first multi-stage actuation button to the first depressed position is configured to translate the heat shroud from the first position to the second position, wherein actuating the first multi-stage actuation button to the second depressed position is configured to energize the non-movable monopolar electrocautery electrode, and wherein releasing the first multi-stage actuation button translates the heat shroud from the second position to the first position.
9 . The electrocautery pencil of claim 1 , wherein the multi-function control actuator includes a first button, a second button and an actuation button, and wherein the actuation button is positioned between the first button and the second button.
10 . The electrocautery pencil of claim 1 , wherein releasing the multi-function control actuator stops energizing the non-movable monopolar electrocautery electrode.
11 . The electrocautery pencil of claim 1 , wherein energizing the non-movable monopolar electrocautery electrode is prevented unless the multi-function control actuator is actuated to translate the heat shroud from the first position to the second position.
12 . An electrocautery pencil comprising:
a body;
a non-movable monopolar electrocautery electrode secured to the body, the non-movable monopolar electrocautery electrode including a distal tip;
a heat shroud defining an internal lumen and a distal end, the heat shroud being translatable relative to the non-moveable monopolar electrocautery electrode between a first position wherein the distal tip of the non-movable monopolar electrocautery electrode is disposed entirely within the internal lumen and proximal to the distal end of the heat shroud, and a second position wherein the distal tip of the non-moveable monopolar electrocautery electrode is disposed distal to the distal end of the heat shroud, and wherein the heat shroud is constructed of a heat-resistant material configured to shield the distal tip of the non-movable monopolar electrocautery electrode when in the first position;
an electromagnet operably connected to one of the body and the heat shroud, the electromagnet including a core of magnetic material surrounded by a coil of wire through which an electric current is passed to magnetize the core,
a permanent magnet operably connected to the other one of the body and the heat shroud,
wherein the electromagnet is configured such that when electrical current is passed through the coil to thereby magnetize the core, the electromagnet magnetically interacts with the permanent magnet to selectively translate the heat shroud from the first position to the second position; and
a multi-function control actuator coupled to the body, wherein actuating the multi-function control actuator to a first configuration translates the heat shroud from the first position to the second position, wherein actuating the multi-function control actuator to a second configuration energizes the non-movable monopolar electrocautery electrode, and wherein releasing the multi-function control actuator translates the heat shroud from the second position to the first position.
13 . The electrocautery pencil of claim 12 ,
wherein the heat shroud further includes a plurality of cooling apertures extending through a wall of the heat shroud, wherein each of the plurality of cooling apertures provide for fluid communication from an outer surface of the heat shroud to the internal lumen.
14 . The electrocautery pencil of claim 13 , wherein the electromagnet is configured to magnetically push the permanent magnet to translate the heat shroud from the first position to the second position.
15 . The electrocautery pencil of claim 13 , wherein the electromagnet is configured to magnetically pull the permanent magnet to translate the heat shroud from the first position to the second position.
16 . The electrocautery pencil of claim 13 , wherein the plurality of cooling apertures includes a first set of cooling apertures positioned along a first region of the heat shroud and a second set of cooling apertures positioned along a second region of the heat shroud, wherein the first set of cooling apertures are positioned distal to the second set of cooling apertures, wherein the first set of cooling apertures are radially offset from the second set of cooling apertures, wherein the first set of cooling apertures are positioned outside of the body in the second position, and wherein the second set of cooling apertures are positioned within the body in the second position.