WO2022081959A1 - Instrument électrochirurgical doté d'une électrode réutilisable - Google Patents

Instrument électrochirurgical doté d'une électrode réutilisable Download PDF

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Publication number
WO2022081959A1
WO2022081959A1 PCT/US2021/055160 US2021055160W WO2022081959A1 WO 2022081959 A1 WO2022081959 A1 WO 2022081959A1 US 2021055160 W US2021055160 W US 2021055160W WO 2022081959 A1 WO2022081959 A1 WO 2022081959A1
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WO
WIPO (PCT)
Prior art keywords
electrode
electrosurgical
cutouts
shaft
electrosurgical instrument
Prior art date
Application number
PCT/US2021/055160
Other languages
English (en)
Inventor
Naveen Kanth NELLI
Arifmohamad MUJAWAR
Original Assignee
Covidien Lp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Covidien Lp filed Critical Covidien Lp
Publication of WO2022081959A1 publication Critical patent/WO2022081959A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1402—Probes for open surgery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/16—Indifferent or passive electrodes for grounding
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/00607—Coagulation and cutting with the same instrument
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B2018/1405—Electrodes having a specific shape
    • A61B2018/1412—Blade
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B2018/1405—Electrodes having a specific shape
    • A61B2018/1417—Ball
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B2018/1405—Electrodes having a specific shape
    • A61B2018/1425—Needle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B2018/1465—Deformable electrodes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B2018/1495—Electrodes being detachable from a support structure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2218/00—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2218/001—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body having means for irrigation and/or aspiration of substances to and/or from the surgical site
    • A61B2218/007—Aspiration
    • A61B2218/008—Aspiration for smoke evacuation

Definitions

  • the present disclosure relates to an electrosurgical electrode and, more particularly, to a reusable electrosurgical electrode having an extendable working end to enable precise delivery of RF energy.
  • Electrosurgery involves application of high radio frequency (RF) electrical current to a surgical site to cut, ablate, desiccate, or coagulate tissue.
  • RF radio frequency
  • an active electrode delivers radio frequency alternating current from the electrosurgical generator to the targeted tissue.
  • a patient return electrode is placed remotely from the active electrode to conduct the current back to the generator.
  • the traditional monopolar electrodes apply the current to heat the tissue to transect or achieve hemostasis.
  • the surgeons use electrodes having various shapes and sizes to accommodate surgeon’s needs for specific surgical procedures.
  • These electrodes are disposable and include a conductive metallic shaft with an insulated sleeve. Thus, during surgery there are multiple electrodes that are used during the procedure.
  • the present disclosure provides an electrosurgical electrode assembly for use with an electrosurgical pencil.
  • the electrode assembly includes novel features that allow for the electrode assembly to be reusable and repurposable for a variety of different electrosurgical procedures.
  • the electrode assembly includes a hollow shank having an inner spring and an internal ratchet surface to allow for adjusting the length of an electrode disposed within the hollow shaft.
  • the electrode is longitudinally movable relative to and within the hollow shank.
  • the electrode includes an electrode shaft having a plurality of hollow cutouts allowing for articulation of a distal end portion of the electrode relative to a proximal end portion that is disposed within the hollow shaft.
  • the hollow cutouts are disposed along a section of the electrode shaft to provide for a desired articulation angle of a working end such that once articulated by bending the working end away from the electrode shaft, the working end can easily access deep and hard-to-reach areas.
  • the working end may have a microneedle structure or any other electrode structure, suitable for performing electrosurgical procedures.
  • the electrode also includes an outer insulation layer disposed over the shaft. The insulation layer leaves the working end of the electrode exposed.
  • the insulation layer may be formed from any suitable dielectric, conforming material that allows for bending of the electrode while allowing for cleaning and sterilization post-surgery.
  • an electrosurgical electrode includes a hollow shank including a proximal portion configured to couple to an electrosurgical instrument and a distal portion having a distal lumen.
  • the electrode also includes an electrode shaft having a proximal end portion disposed and movable within the distal lumen, such that the electrode is longitudinally movable relative to the hollow shank.
  • the electrode also includes a working end articulable relative to the electrode shaft.
  • the electrosurgical electrode assembly where the distal lumen includes a pair of opposing arrays of a plurality of ridges, each pair of opposing ridges defining a position of the electrode.
  • the electrode shaft may include a ball configured to engage a pair of opposing ridges of the pair of opposing arrays.
  • the electrode may be movable between the positions and is secured at one of the positions.
  • the working end may include at least one of a needle, a blade, or a ball.
  • the electrode may also include a plurality of cutouts disposed along a section of the electrode shaft and extending through the electrode shaft.
  • the electrode may further include an insulative sheath disposed over electrode shaft and covering the plurality of cutouts.
  • the plurality of cutouts may be disposed proximally of the working end, such that the electrode shaft is bendable at one of the cutouts.
  • Each of the cutouts defines an articulation plane that is transverse to a longitudinal axis defined by the electrode shaft.
  • the working end may be articulable between a first configuration in which each of articulation planes are parallel to each other and a second configuration in which at least one of the articulation planes is not parallel to any of the other articulation planes.
  • an electrosurgical instrument includes a housing having a distal end portion and a chuck configured to couple to a source of electrosurgical energy.
  • the electrosurgical instrument also includes an electrosurgical electrode removably insertable into the chuck.
  • the electrosurgical electrode includes a hollow shank having a proximal portion configured to be inserted into the chuck and a distal portion having a distal lumen.
  • the electrosurgical electrode also include an electrode shaft having a proximal end portion disposed and movable within the distal lumen, such that the electrode is longitudinally movable relative to the hollow shank.
  • the electrode also includes a working end articulable relative to the electrode shaft.
  • Implementations of the above embodiment may include one or more of the following features.
  • the electrosurgical instrument where the distal lumen includes a pair of opposing arrays of a plurality of ridges, each pair of opposing ridges defining a position.
  • the electrode shaft may include a ball configured to engage a pair of opposing ridges of the pair of opposing arrays.
  • the electrode may be movable between the positions and is secured at one of the positions.
  • the electrode may also include a plurality of cutouts disposed along a section of the electrode shaft and extending through the electrode shaft.
  • the electrode may further include an insulative sheath disposed over electrode shaft and covering the plurality of cutouts.
  • the plurality of cutouts are disposed proximally of the working end, such that the electrode shaft is bendable at one of the cutouts.
  • Each of the cutouts defines an articulation plane that is transverse to a longitudinal axis defined by the electrode shaft.
  • the electrosurgical instrument may also include an adjustment assembly having a knob and a rod coupled to the knob and disposed within the housing, wherein the knob is slidably movable in a longitudinal direction.
  • the knob is slidably movable in a longitudinal direction.
  • the proximal portion of the hollow shank defines a proximal lumen configured to accommodate the rod, such that the rod is configured to contact the proximal end portion of the electrode thereby moving the electrode longitudinally relative to the hollow shank.
  • the electrosurgical electrode assembly where the distal lumen includes an inner threaded portion.
  • the proximal end portion includes an outer threaded portion such that the electrode is threadably coupled to the hollow shank.
  • the electrode may include a first plurality of cutouts disposed along a section of the electrode shaft and a second plurality of cutouts disposed alone the section of the electrode shaft and interspersed with the first plurality of cutouts.
  • the electrode shaft may be bendable at one of the cutouts.
  • the electrode defines a lumen having a spring disposed therein.
  • FIG. 1 is a perspective view of an electrosurgical system having an electrosurgical pencil according to an embodiment of the present disclosure
  • FIG. 2 is an enlarged view of a distal end portion of the electrosurgical pencil of FIG. 1;
  • FIG. 3 is a plan, cross-sectional view of the distal end portion of the electrosurgical pencil of FIG. 1 taken along a cross-sectional line 3-3.
  • FIG. 4 is a side view of an electrode assembly according to an embodiment of the present disclosure.
  • FIG. 5 is a side, cross-sectional view of the electrode assembly of FIG. 4 taken along a cross-sectional line 5-5;
  • FIG. 6 is a perspective, cross-sectional view of an electrode shank of the electrode assembly of FIG. 4 taken along a cross-sectional line 5-5;
  • FIG. 7 is a perspective view of a needle electrode of the electrode assembly of FIG. 4;
  • FIG. 8 is a perspective view of a blade electrode of the electrode assembly of FIG. 4;
  • FIG. 9 is a perspective view of a ball electrode of the electrode assembly of FIG. 4;
  • FIG. 10 is side view of the electrode in an articulated configuration according to an embodiment of the present disclosure.
  • FIG. 11 is a side view of the electrode assembly of FIG. 4 with the electrode in the articulated configuration according to an embodiment of the present disclosure
  • FIG. 12 is a side, cross-sectional view of an electrode assembly according to an embodiment of the present disclosure
  • FIG. 13 is a front, perspective view of the electrode assembly of FIG. 12;
  • FIG. 14 is a side, cross-sectional view of an insulation sleeve of the electrode assembly of FIG. 12;
  • FIG. 15 is an enlarged, front, cross-sectional view of the electrode assembly of FIG. 12;
  • FIG. 16 is a perspective, cross-sectional view of an electrode shank of the electrode assembly of FIG. 4 taken along a cross-sectional line 5-5;
  • FIG. 17 is a perspective view of a needle electrode of the electrode assembly of FIG. 12.
  • distal refers to the portion of the surgical instrument coupled thereto that is closer to the patient, while the term “proximal” refers to the portion that is farther from the patient.
  • an electrosurgical system 10 includes a generator 14 for use with an electrosurgical instrument 20 having an electrode assembly 30 according to the present disclosure.
  • the electrosurgical instrument 20 includes a housing 21 and the electrode assembly 30 is removably coupled to a distal end portion 22 of the housing 21.
  • the system 10 may include a plurality of return electrode pads 12 that, in use, are disposed on a patient to minimize the chances of tissue damage by maximizing the overall contact area with the patient.
  • Electrosurgical alternating RF current is supplied to the electrosurgical instrument 20 by a generator 14 via supply line 16.
  • the alternating RF current is returned to the generator 14 through the return electrode pad 12 via a return line 18.
  • the distal end portion 22 of the electrosurgical instrument 20 includes a chuck 23 that is electrically coupled to the generator 14 via the supply line 16.
  • the distal end portion 22 also includes an adjustment assembly 24 having a knob 25 and a rod 26 that is coupled to the knob 25.
  • the rod 26 is disposed and is movable within distal end portion 22 and the chuck 23.
  • the housing 21 defines a slot 27 configured to allow the knob 25 to slidably move along a longitudinal axis defined by the housing 21 in either proximal or distal direction as shown by the arrow 28 thereby moving the rod 26 within the distal end portion 22.
  • the electrode assembly 30 includes a hollow shank 40 configured to be inserted into the distal end portion 22 of the electrosurgical instrument 20.
  • the electrode assembly 30 also includes an electrode 60 that is movable within and relative to the hollow shank 40.
  • the hollow shank 40 includes a proximal portion 42 having a proximal lumen 43 and a distal portion 44 having a distal lumen 45.
  • the proximal lumen 43 and the distal lumen 45 are connected to each other and extend the entire length of the hollow shank 40.
  • the proximal portion 42 is configured to frictionally engage within the chuck 23 such that the electrode assembly 30 are securedly coupled to the distal end portion 22 of the electrosurgical instrument 20.
  • secure fitting forms an electrical contact between the hollow shank 40 and the chuck 23.
  • the proximal lumen 43 is sized for passage of the rod 26 therethrough.
  • the distal lumen 45 is configured to engage the electrode 60.
  • the distal lumen 45 includes a plurality of ridges 50 disposed at periodic intervals within the distal lumen 45.
  • the plurality of ridges 50 may be disposed in a pair of opposing longitudinal arrays 52.
  • the hollow shank 40 and the electrode 60 are formed from a conductive type material, such as, any suitable metal or metal alloy, including, but not limited to, stainless steel, tungsten, aluminum, and combinations thereof.
  • the hollow shank 40 and the electrode 60 may be formed using any suitable metal forming technique such as computer numeral control machining process or metal injection molding.
  • the distal portion 44 may be covered by an insulation sleeve 46.
  • the distal portion 44 may include a plurality of surface features 47 (FIG. 6), such as ridges and/or depressions, that allow for the insulation sleeve 46 to be secured to the distal portion 44.
  • the insulation sleeve 46 may include a lip 48 extending around the insulation sleeve 46.
  • the lip 48 may be formed as part of the hollow shank 40 as shown in FIG. 11. The lip 48 abuts the distal end portion 22 of the electrosurgical instrument 20 and acts as a mechanical stop to limit further insertion of the electrode assembly 30 into the electrosurgical instrument 20.
  • the insulation sleeve 46 electrically isolates the hollow shank 40 and may be formed from any dielectric material, such as a polymer, a ceramic, or combinations thereof.
  • Suitable polymers include polytetrafluoroethylene (PTFE), perfluoroalkoxy alkane (PF A) polymers and suitable ceramics include titanium nitride, chromium nitride, aluminum oxide, and the like.
  • the electrode 60 includes an electrode shaft 62 having a proximal end portion 63 and a distal end portion 64.
  • the distal end portion 64 also includes a working end 65, which may be a needle 66 as shown in FIG. 7.
  • the working end 65 may be a blade 67 as shown in FIG. 8.
  • the working end 65 may be a ball 68 as shown in FIG. 9.
  • the working end 65 may be a combination of various geometric shapes, i.e., a blade with a ball at a distal end thereof.
  • the electrode 60 also includes a ball 70 disposed at the proximal end portion 63.
  • the ball 70 secures the electrode 60 within the distal lumen 45 of the hollow shank 40.
  • the ball 70 is dimensioned to frictionally engage a pair of opposing ridges 50 of each of the longitudinal arrays 52 as shown in FIG. 5. This allows for longitudinal movement of the electrode 60 in either proximal or distal direction while securing the electrode 60 at each of the positions as defined by the opposing ridges 50.
  • the electrode 60 is also secured within the distal lumen 45 via a biasing member 49 disposed within the distal lumen 45.
  • the biasing member 49 may be a helical spring that is disposed between a proximal wall of the distal lumen 45 and the ball 70. The biasing member 49 biases the electrode 60 in a distal direction, thereby pushing the ball 70 against the opposing ridges 50.
  • the electrode 60 may be moved distally via the adjustment assembly 24 by pushing on the knob 25.
  • the rod 26 within the proximal lumen 43 of the hollow shank 40 engages the ball 70 and pushes the electrode 60 in a distal direction.
  • the electrode 60 may be moved proximally by gripping the electrode 60 and pushing the electrode 60 in the proximal direction.
  • the electrode 60 may also be moved distally in a similar manner, i.e., by gripping and pulling the electrode 60.
  • the ball 70 is secured by the opposing ridges 50 and locked in place unless a sufficient force is imparted on the electrode 60 to move the electrode 60.
  • the electrode 60 further includes a plurality of cutouts 72 disposed along a section of the electrode shaft 62 as shown in FIGS. 5 and 7-10.
  • the cutouts 72 may have an oval shape and extend transversely through the electrode shaft 62.
  • the cutouts 72 allow for articulation of the working end 65 relative to the electrode shaft 62 as shown in FIGS. 10 and 11.
  • the cutouts 72 are placed more distally and closer together than the cutouts 72 of a longer working end 65 of FIG. 8, where the cutouts 72 are placed further apart and more proximally.
  • the cutouts 72 may be placed anywhere along the electrode shaft 62 such that a section of the electrode shaft 62 that is distal of the cutouts 72 may be articulated.
  • Each of the cutouts 72 defines an articulation plane that is transverse to a longitudinal axis defined by the electrode shaft 62.
  • a first, i.e., unarticulated or straight, configuration each of the articulation planes of the cutouts 72 are parallel to each other.
  • the electrode shaft 62 may be bent along any one or more of the cutouts 72, such that any of the articulation planes are not parallel relative to each other.
  • the terms parallel and perpendicular are understood to include relative configurations that are substantially parallel and substantially perpendicular up to about + or - 5 degrees from true parallel and true perpendicular.
  • the electrode shaft 62 is articulated by bending the electrode shaft 62.
  • the spacing, number, and the section along the cutouts 72 are formed on the electrode shaft 62 dictate the section of the electrode shaft 62 may be articulated and the maximum articulation angle.
  • the electrode 60 includes an insulative sheath 74, which may be formed from a dielectric polymer as the insulation sleeve 46 of the hollow shank 40.
  • the insulative sheath 74 covers the cutouts 72 and provides structural integrity to the electrode shaft 62 during articulation.
  • the insulative sheath 74 may be formed from a conformable polymer, which allows the sheath 74 to stretch outside of the articulation bend and compress inside of the articulation bend.
  • the electrode 60 is formed from a malleable metal or a metal alloy, which allows for the electrode 60 to bend without breaking or cracking due to the presence of the cutouts 72.
  • the malleable nature of the electrode shaft 62 combined with the conformable nature of the sheath 74 allow for the electrode 60 to be bend by the user in either articulation direction to achieve a desired articulation angle.
  • the user may bend the electrode at any of the cutouts 72 to achieve the desired articulation angle.
  • an electrode assembly 130 includes a hollow shank 140 configured to be inserted into the distal end portion 22 of the electrosurgical instrument 20.
  • the electrode assembly 130 also includes an electrode 160 that is movable within and relative to the hollow shank 140.
  • the electrode assembly 130 is substantially similar to the electrode assembly 30 and only the differences therebetween are described.
  • the features of the electrode assembly 130 may be used interchangeably with those of the electrode assembly 30 of FIGS. 4-11 and vice versa.
  • the electrode assembly 130 is configured to enable smoke evacuation. During electrosurgical procedures smoke is generated at the surgical site as electrical current is applied to tissue. A suction source (not shown) may be coupled to the electrosurgical instrument 20, which then removes the smoke from the surgical site.
  • the hollow shank 140 includes a proximal portion 142 having a proximal lumen 143 and a distal portion 144 having a distal lumen 145 (FIGS. 12 and 16).
  • the proximal lumen 143 and the distal lumen 145 are connected to each other and extend the entire length of the hollow shank 140.
  • the hollow shank 140 also includes one or more evacuation channels 141 defined in the distal portion 144.
  • the evacuation channels 141 are radially disposed around the distal lumen 145.
  • the evacuation channels 141 extend from a distal end 144a of the hollow shank 140 to the proximal lumen 143.
  • the distal portion 144 is covered by an insulation sleeve 146, which includes one or more evacuation openings 154 defined through a distal surface 156 of the insulation sleeve 146.
  • the evacuation openings 154 are aligned with the evacuation channels 141, such that as suction is applied to the proximal lumen 143, smoke (shown as an arrow “S”) is suctioned through the evacuation openings 154 and the evacuation channels 141.
  • another embodiment of the electrode 160 includes an electrode shaft 162 having a proximal end portion 163 and a distal end portion 164.
  • the distal end portion 164 also includes a working end 165, which may be the needle 66, the blade 67, or the ball 68 as shown in FIGS. 7-9, or any combinations thereof.
  • the electrode 160 is threadably coupled to the hollow shank 140.
  • the distal portion 144 of the hollow shank 140 includes an inner thread 152 (FIG. 16).
  • the proximal end portion 163 of the electrode 160 includes an outer thread 170 which interfaces with the inner thread 152.
  • the electrode 160 is moved longitudinally by rotation of the thread in either clockwise or counterclockwise direction, depending on the direction of the inner thread 152 and the outer thread 170.
  • the force to rotate the electrode 160 may be from about 1 lb. to about 5 lbs.
  • the electrode 160 may also be articulated as the electrode 60.
  • the electrode 160 includes a lumen 161 extending through the electrode shaft 162 (FIG. 15).
  • the electrode 160 includes a first plurality of cutouts 172.
  • the electrode 160 may also include a second plurality of cutouts 173. As shown in FIGS. 15 and 17, the second plurality of cutouts 173 are interspersed with the first plurality of cutouts 172.
  • the cutouts 172 and 173 may have an oval shape and extend transversely through the electrode shaft 162 and the lumen 161. Placement of the cutouts 172 and 173 forms a double helix 176 along the electrode shaft 162.
  • Each of the cutouts 172 define a first through axis and each of the cutouts 172 define a second through axis, which is transverse to the first through axis.
  • the first plurality of cutouts 172 allow for articulation of the working end 165 in either direction along the first plurality of cutouts 172 (i.e., horizontally).
  • the second plurality of cutouts 173 allow for articulation of the working end 165 in either direction along the second plurality of cutouts 173 (i.e., vertically).
  • Each of the cutouts 172 and 173 also defines an articulation plane that is transverse to a longitudinal axis defined by the electrode shaft 162.
  • a first, i.e., unarticulated or straight, configuration each of the articulation planes of the cutouts 172 are parallel to each other.
  • the electrode shaft 162 may be bent along any one or more of the cutouts 172, such that any of the articulation planes are not parallel relative to each other.
  • the electrode 160 also includes a spring 149 disposed within the lumen 161 and an insulative sheath 174 (FIG. 13) disposed over the electrode shaft 162.
  • the insulative sheath 174 covers the first plurality of cutouts 172 and the second plurality of cutouts 173.
  • the spring 149 and the insulative sheath 174 provide flexibility and support the double helix 176.
  • the electrodes 60 and 160 may be articulated multiple times in different directions, allowing for its reuse. In embodiments, the electrodes 60 and 160 may be articulated and straightened from about 5 cycles to about 100 cycles, which may be a minimum of 20 cycles. The force to articulate the electrodes 60 and 160 may be from about 1 lb. to about 5 lbs. The electrodes 60 and 160 may be from about 5 cm to about 15 cm and may be longitudinally extended from about 1 cm to about 10 cm. [0053] After every use, the electrode assembly 30 may be cleaned and sterilized using any conventional techniques.
  • the materials (i.e., metals and polymers) used in making the electrode assembly 30 provide sufficient structural integrity to the electrode assembly 30 to be used multiple times without degradation of its mechanical or electrical operational properties, i.e., rigidity, electrical conductivity, etc.
  • Insulative materials i.e., insulation sleeves 46 and 146 and insulative sheaths 74 and 174) are configured to withstand from about 5 cleaning and/or sterilization cycles to about 30 cycles while retaining their dielectric properties.

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  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Otolaryngology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

Une électrode électrochirurgicale comprend un emmanchement de pointe creux comprenant une partie proximale conçue pour être couplée à un instrument électrochirurgical et une partie distale présentant une lumière distale. L'électrode comprend également un corps d'électrode présentant une partie d'extrémité proximale disposée et mobile à l'intérieur de la lumière distale, de telle sorte que l'électrode est mobile longitudinalement par rapport à l'emmanchement de pointe creux. L'électrode comprend également une extrémité de travail articulable par rapport au corps d'électrode.
PCT/US2021/055160 2020-10-16 2021-10-15 Instrument électrochirurgical doté d'une électrode réutilisable WO2022081959A1 (fr)

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IN202041045105 2020-10-16
IN202041045105 2020-10-16

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Citations (7)

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