User interface and locking features for positioning multiple components within a body

Abstract

The present invention is entitled "User Interface and Locking Features for Positioning Multiple Components in the Body". The present invention discloses some embodiments, which include devices, systems and methods for positioning electrodes. In an exemplary embodiment, a device includes a main electrode defining a lumen, an elongated auxiliary electrode that can be slidably received in the lumen, and a sheath configured to slidably receive the electrode and convey the electrode toward a target area. The housing is coupled to the sheath and is movably mounted to actuate the sheath relative to the target area. The main actuator is coupled to the main electrode and slidably coupled to the housing to actuate the main electrode relative to the sheath. The auxiliary actuator is coupled to the auxiliary electrode and movably coupled to the main actuator so as to be able to slide in coordination with the electrode. The auxiliary actuator can rotate independently of the main actuator to travel along a spiral path, thereby actuating the auxiliary electrode to move relative to the target area independently of the main electrode.

Description

[0001] Priority declaration

[0002] This application claims priority to and the benefit of U.S. Provisional Patent Application Serial No. 62 / 945,825, filed on December 9, 2019, entitled “USER INTERFACE AND LOCK FEATURES FOR POSITIONING MULTIPLE COMPONENTS WITHIN A BODY,” U.S. Provisional Patent Application Serial No. 62 / 945,836, filed on December 9, 2019, entitled “HELICAL GUIDE CHANNEL WITH VARIABLE PITCH,” and U.S. Provisional Patent Application Serial No. 62 / 945,843, filed on December 9, 2019, entitled “SLIDABLE COUPLING TO CONNECT DEVICES.” Technical Field

[0003] The present disclosure relates to user interfaces and locking features for positioning multiple components within a body. Background Art

[0004] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0005] Inserting and manipulating tiny components within living organisms or other objects enables ever-improving analysis, diagnosis, and treatment of these organisms or objects using minimally invasive techniques. By way of two examples, endoscopic imaging and catheterization therapy enable the evaluation and treatment of many internal lesions without invasive surgery.

[0006] Electrosurgery also provides minimally invasive treatment by selectively applying electrical current to selected tissue. Electrosurgery involves inserting one or more electrodes through an orifice or small incision and then extending the one or more electrodes to a desired location in the patient's body. Radiofrequency ("RF") current is then applied to the electrodes to coagulate, ablate, or otherwise treat the tissue at that location. Monopolar electrosurgical instruments involve inserting one electrode that electrically interacts with a second electrode electrically connected to the patient's body. Bipolar electrosurgical instruments involve deploying two electrodes at the location in the patient's body where treatment is to be applied.

[0007] Positioning one or both electrodes at a desired location in a patient's body is an important part of electrosurgical treatment. Moving and holding the electrodes in place, especially when more than one electrode must be moved or held independently of another electrode, can present challenges to the medical personnel directing the treatment. Furthermore, because positioning one or more electrodes in place can involve following a specific sequence of steps for positioning the electrodes, it can also be important to help the operator follow that sequence correctly. Summary of the invention

[0008] Embodiments disclosed herein include: devices, systems and methods for controlling the movement of multiple components within the body; devices, systems and methods for actuating a slender instrument using a rotary actuator guided by a helical path with different pitches; and devices, systems and methods for connecting a device such as a user interface for controlling the movement of multiple components within the body to another device.

[0009] In an exemplary embodiment, a device includes an elongated main electrode defining a lumen therein, an elongated auxiliary electrode capable of being slidably received within the lumen, and a sheath configured to be capable of slidably receiving the main electrode therein, wherein the sheath is further configured to deliver the main electrode and the auxiliary electrode to a target area. The housing is operably coupled to the sheath and is movably mounted to slidably actuate the sheath relative to the target area. The main actuator is operably coupled to the main electrode and slidably coupled to the housing to actuate the main electrode relative to the sheath. The auxiliary actuator is operably coupled to the auxiliary electrode and movably coupled to the main actuator to be capable of sliding with the main actuator, thereby actuating the auxiliary electrode in coordination with the main electrode. The auxiliary actuator is capable of rotating independently of the main actuator to travel along a spiral path, thereby actuating the auxiliary electrode to move relative to the target area independently of the main electrode.

[0010] In another exemplary embodiment, a system for treating tissue at a target area includes an electric power source configured to selectively provide power between a first pole and a second pole via a bipolar cable. An electrode control device includes an elongated main electrode defining a lumen therein, an elongated auxiliary electrode capable of being slidably received in the lumen, and a sheath configured to be capable of slidably receiving the main electrode therein, wherein the sheath is further configured to transmit the main electrode and the auxiliary electrode to the target area. The housing is operably coupled to the sheath and is movably mounted to slidably actuate the sheath relative to the target area. The main actuator is operably coupled to the main electrode and slidably coupled to the housing to actuate the main electrode relative to the sheath. The auxiliary actuator is operably coupled to the auxiliary electrode and movably coupled to the main actuator to be able to slide with the main actuator, thereby actuating the auxiliary electrode in coordination with the main electrode. The auxiliary actuator can rotate independently of the main actuator to travel along a spiral path, thereby actuating the auxiliary electrode to move independently of the main electrode relative to the target area.

[0011] In another exemplary embodiment, a method includes moving the distal end of a sheath containing a primary electrode and an auxiliary electrode adjacent to a target area. A primary actuator operably coupled to the primary electrode and an auxiliary actuator operably coupled to the auxiliary electrode and movably engaged with the primary actuator slide to a first position to actuate the distal ends of the primary electrode and the auxiliary electrode relative to the target area. The auxiliary actuator rotates relative to the primary actuator so that the auxiliary actuator moves independently of the primary actuator along a spiral path to a second position, thereby actuating the distal end of the auxiliary electrode to move relative to the target area independently of the primary electrode.

[0012] In an additional exemplary embodiment, an apparatus includes an elongated instrument movable along an axis. A rotatable actuator is operably coupled to a proximal end of the instrument to actuate movement of the instrument along the axis in response to rotation of the rotatable actuator. A guide is operably coupled to the rotatable actuator, wherein the guide defines a generally helical path about the axis to guide movement of the rotatable actuator, and wherein a pitch of the helical path is varied to reduce a distance traveled by the actuator along the axis per unit rotation of the actuator.

[0013] In another additional exemplary embodiment, a system includes an elongated main electrode defining a lumen therein. An elongated auxiliary electrode can be slidably received in the lumen. A sheath is configured to slidably receive the main electrode therein, the sheath being further configured to convey the main electrode and the auxiliary electrode toward a target area. The housing is operably coupled to the sheath and movably mounted to slidably actuate the sheath relative to the target area. A main actuator is operably coupled to the main electrode and slidably coupled to the housing to actuate the main electrode to slide relative to the sheath along an axis. The main actuator includes a guide defining a generally spiral path, wherein the pitch of the spiral path is variable to reduce movement of the guide member relative to the axis per unit rotation of the guide member around the spiral path. An auxiliary actuator is operably coupled to the auxiliary electrode and rotatably received in the guide of the main actuator. The auxiliary actuator supports a guide member configured to engage the spiral path. The auxiliary actuator can rotate relative to the main actuator to actuate the auxiliary electrode to move relative to the main electrode.

[0014] In yet another additional exemplary embodiment, a method includes coupling an elongated instrument at its proximal end to an actuator movable along an axis, and actuating the instrument by rotatably moving the actuator about the axis through a generally helical path, wherein the pitch of the helical path is varied to vary the distance the actuator travels along the axis per unit rotation of the actuator.

[0015] In another additional embodiment, a locking body defines an opening, the opening comprising a first portion having a first width and a second portion having a second width less than the first width, wherein the locking body can be slidably mounted on one of a first device supporting a first connector and a second device supporting a second connector. One of the first connector and the second connector is configured to support a flange thereon, the flange having a flange width less than the first width and greater than the second width. The slidable mounting mechanism is configured to slidably fix the locking body on one of the first device and the second device. The slidable mounting mechanism is further configured to enable the locking body to slide between an open position and a closed position, in which the first portion can be positioned so that the first connector can be inserted into the second connector to form a connection, and in the closed position, the edge of the locking body surrounding the second portion abuts the flange, so that the connector supporting the flange is prevented from being withdrawn from the connection.

[0016] In another additional exemplary embodiment, a system includes an elongated main electrode defining a lumen therein. An elongated auxiliary electrode is slidably received in the lumen. A sheath slidably receives the main electrode and is configured to deliver the main electrode and the auxiliary electrode toward a target area. The housing is operably coupled to the sheath and is movably mounted to slidably actuate the sheath relative to the target area. A main actuator is operably coupled to the main electrode and movably coupled to the housing to actuate the main electrode relative to the sheath. An auxiliary actuator is operably coupled to a second electrode and movably coupled to the main actuator, wherein the auxiliary actuator is capable of moving independently relative to the main actuator to actuate the auxiliary electrode relative to the main electrode. A first coupling is supported by the housing and is configured to engage a second coupling, the second coupling supporting a flange having a flange width, wherein the second coupling extends from the device through which the sheath and the electrode are delivered to the target area. A locking body defines an opening comprising a first portion having a first width greater than the flange width and a second portion having a second width less than the flange width. The slidable mounting mechanism is configured to slidably secure the locking body to the housing. The slidable mounting mechanism is further configured to enable the locking body to slide between an open position in which the first portion is positionable so that the first coupling member can insertably receive the second coupling member to form a connection, and a closed position in which an edge of the locking body surrounding the second portion abuts the flange so that the coupling member supporting the flange is prevented from being withdrawn from the connection.

[0017] In other additional exemplary embodiments, a method includes positioning a locking body in an open position, wherein the locking body defines an opening, the opening including a first portion having a first width and a second portion having a second width less than the first width. The locking body is slidably mounted on one of a first device supporting a first coupling member and a second device supporting a second coupling member. When the locking body is positioned in the open position, the first portion is disposed between the first coupling member and the second coupling member. A connection is formed by inserting the first coupling member into the second coupling member so that one of the first coupling member and the second coupling member supports a flange having a flange width less than the first width and greater than the second width. The locking body is repositioned to a closed position, in which the edge of the locking body surrounding the second portion abuts the flange to prevent the flange from being withdrawn from the connection.

[0018] Other features, advantages, and areas of applicability will become apparent from the description provided herein.It should be understood that the detailed description and specific examples are intended for illustrative purposes only and are not intended to limit the scope of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure in any way. The components in the drawings are not necessarily drawn to scale, but emphasis is placed on illustrating the principles of the disclosed embodiments. In the drawings:

[0020] Figure 1 is a partial schematic block diagram of an exemplary system for processing tissue;

[0021] Figures 2 to 5 is a schematic diagram of the positioning of the distal ends of the sheath, primary electrode, and auxiliary electrode relative to the target area;

[0022] Fig. 6A and Fig. 7A is a schematic diagram of moving a sheath actuator to position the sheath relative to a target area;

[0023] Figure 6B and Figure 7B are respectively corresponding to Fig. 6A and Fig. 7A a schematic diagram of the position of the sheath actuator, the sheath, the primary electrode and the auxiliary electrode relative to the distal end of the target area;

[0024] Figure 8 is a side view of an exemplary guard actuator and guard lock;

[0025] Fig. 9 yes Figure 8 A cross-sectional view of a sheath actuator and a sheath lock;

[0026] Fig.10 is a side view of one embodiment of a user interface for positioning a component relative to a target area;

[0027] Fig.11 yes Fig.10 An exploded view of the user interface of

[0028] Fig. 12A , Fig.13A , Fig.14A , Fig.15A , Fig.16A , Fig.17A , Fig.18A , Fig.19A , Fig. 20A and Fig.21A yes Fig.10 a side view of one embodiment of a user interface of FIG. 1 , the user interface being manipulated to position a plurality of components relative to a target area;

[0029] Fig. 12B , Fig. 13B , Fig. 14B , Fig. 15B , Fig. 16B , Fig. 17B , Fig.18B , Fig.19B , Fig. 20B and Fig. 21B are respectively corresponding to Fig. 12A , Fig.13A , Fig.14A , Fig.15A , Fig.16A , Fig.17A , Fig.18A , Fig.19A , Fig. 20A and Fig.21A a schematic diagram of the distal end of the sheath, primary electrode, and auxiliary electrode relative to the target area of ​​the user interface;

[0030] Fig. 22 is a side view of a guide sleeve defining a helical passage having a varying pitch for guiding a rotatable actuator;

[0031] Fig.23 yes Fig. 22 a side view of a cross section of a guide sleeve;

[0032] Fig.24 and Fig.25 is a side view of a wire having different cross-sections along its length;

[0033] Fig.26 yes Fig.24 and Fig.25 A cross-sectional view of a wire;

[0034] Fig. 27 is an exploded view of a coupling used to join the devices together;

[0035] Fig.28 yes Fig. 27 A side view of a locking body of a coupling;

[0036] Fig.29 is a flow chart of an illustrative method of locating a component using a user interface;

[0037] Fig.30 is a flow chart of an illustrative method of actuating an instrument using a rotary actuator guided by a helical path having different pitches; and

[0038] Fig.31 is a flow chart of an illustrative method of coupling a device with a slidably mounted locking body. DETAILED DESCRIPTION

[0039] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application or use. It should be noted that the first digit of a three-digit reference numeral and the first two digits of a four-digit reference numeral correspond to the first digit of a one-digit reference numeral and the first two digits of a two-digit reference numeral, respectively, where the element first appears.

[0040] The following description explains various embodiments of a user interface for positioning electrodes of an electrosurgical device, and systems including such user interfaces and methods of using the same, by way of illustration only and not limitation. As will be described in detail below, electrosurgical techniques position a first electrode and a second electrode in a target area to which electrical therapy (such as ablation therapy) is to be applied. For specific examples, the user interface and methods of using the same can be used to ablate and / or coagulate tissue, remove lesions, and perform other medical procedures in the lung.

[0041] It should be understood that various embodiments of the user interface described herein can help simplify the process of positioning electrodes and keeping electrodes in place. As will be described below, various embodiments of the user interface achieve selective positioning and locking of electrodes in place by pressing a release, sliding an actuator and rotating another actuator.

[0042] See also Figure 1 , providing tissue for treating a target area of ​​a patient ( Figure 1 100 (not shown). As desired, the system 100 can be a bipolar or monopolar radiofrequency (RF) system for treating tissue in a patient. However, the various embodiments described herein are configured to position two electrodes at a target area to support the implementation of a bipolar treatment system, thereby allowing current to be selectively passed through a specific target area in the patient. Specifically, the system 100 can be used to coagulate and / or ablate soft tissue during percutaneous and / or endoscopic surgical procedures (such as, for example, bronchoscopic surgical procedures for partial and / or complete ablation of cancerous and / or non-cancerous organ lesions). As will be further described, the tissue is treated by positioning one or more electrodes near the tissue to be treated and passing current through the tissue.

[0043] In some embodiments, system 100 includes a user interface 102, an electrosurgical radio frequency (RF) generator operating as a switchable current source 114, an infusion pump 116, and an electrosurgical instrument or device 118, such as, but not limited to, a bronchoscope or any other electrosurgical or endoscopic instrument required for a particular application. User interface 102 can be coupled to electrosurgical device 118 using coupling 150. Electrosurgical device 118 can be used to deliver electrodes ( Figure 1 ), where a user interface 102 may be used to manipulate the position of the electrodes at the target area.

[0044] The user interface 102 is in electrical communication with the switchable current source 114 via an electrical conductor 130. In some embodiments, when the system is operated in a bipolar mode, the electrical conductor 130 is connected to a bipolar socket 131 on the switchable current source 114. The electrical conductor 130 can be coupled to the socket 131 using an electrical connector 134 configured to electrically engage the socket 131. The electrical conductor 130 can be removably or fixedly coupled to the user interface 102, wherein a flexible electrical connection ( Figure 1 ) to electrically couple the current to the electrodes, as described below with reference to Fig.11 In some other embodiments, when the electrical conductor 130 passes through the adapter ( Figure 1 When an auxiliary outlet 133 (not shown) is connected to the auxiliary outlet 133, the system 100 can operate in a single-pole mode.

[0045] The user interface 102 is also connected to the infusion pump 116 via tubing 132, which facilitates the flow of conductive fluids, such as saline solution, from the infusion pump 116 to the user interface 101. Fig.11 As described, the user interface 102 may include a flexible fluid coupling ( Figure 1 ), the flexible fluid coupling receives the conductive fluid flow from the infusion pump 116 and delivers the conductive fluid to the interior of the main electrode where the conductive fluid can be delivered to the target area.

[0046] The switchable current source 114 may be operated using a foot-operated unit 120 electrically connected to the switchable current source 114. The foot-operated unit 120 may include a pedal 122 that directs the switchable current source 114 to apply current to one or more electrodes to cut, ablate, or otherwise treat tissue, and a pedal 124 that instructs the switchable current source 114 to apply a lower current to one or more electrodes to coagulate tissue.

[0047] In various embodiments, the electrosurgical device 118 includes an insertion tube 119 that allows the sheath 103 to be inserted into the body through an orifice or incision (not shown). The distal end 105 of the sheath 103 is delivered to the target area where treatment is to be applied. The sheath 103 contains electrodes (not shown) and delivers the electrodes to the desired treatment location. The distal end 105 of the sheath 103 and the electrodes ( Figure 1 The positioning of the distal end of the electrosurgical device 118 may be controlled by a user interface 102 received by the electrosurgical device 118, as described below with reference to FIG. 6A to FIG. 21B Further described.

[0048] See also Figures 2 to 5, using various embodiments of the user interface 102, the distal end of the component for applying treatment is positioned relative to the target area 202. The target area 202 may include any portion of a lesion or tissue to be treated in the body. Various embodiments of the user interface 102 described below are capable of positioning the component, such as with reference to Figures 2 to 5 As described and as referenced FIG. 6A to FIG. 21B Further described. Figures 2 to 5 The description is provided as a baseline to describe various embodiments of the user interface 102 that may be used to deploy applications of these components.

[0049] In various embodiments, the auxiliary electrode 211 is slidably received within the main electrode 207, and the main electrode 207 is slidably received within the sheath 203. Figures 2 to 5 In various embodiments, the main electrode 207 is in the form of a needle, wherein the distal end 209 is configured to pierce tissue, such as tissue including the target area 202. Piercing the tissue at the target area 202 with the main electrode facilitates positioning the distal end 209 of the main electrode 207 at a desired location, and also facilitates conveying the auxiliary electrode 211 to the desired location. In various embodiments, until the user interface is manipulated to move the auxiliary electrode 211 alone, the main electrode 207 and the auxiliary electrode 211 move simultaneously and in coordination with each other and with the sheath 203 through the same distance.

[0050] See also Figure 2 , the sheath 103, the primary electrode 207, and the auxiliary electrode 211 are positioned at an initial location near the target area 202. The sheath 103 and the electrodes 207 and 211 received therein may be delivered to the location using a bronchoscope or other electrosurgical device 118, as previously described with reference to Figure 1 The distal end 105 of the sheath 103 is positioned near the target area 202. The main electrode 207 is slidably received in the sheath 103, wherein the distal end 209 of the main electrode 207 is located at or near the distal end 105 of the sheath 103. Specifically, for example, Figure 2 The distal end 209 of the primary electrode 207 is shown positioned just shorter than the distal end 105 of the sheath 103. In turn, the auxiliary electrode 211 is slidably received within the primary electrode 207, with the distal end 213 of the auxiliary electrode 211 positioned just within the distal end 209 of the primary electrode 207.

[0051] See also Figure 3 Once the sheath 103 is moved closer to the target area 202, the sheath 103, the primary electrode 207, and the auxiliary electrode 211 are positioned. The sheath 103 may be moved toward the target area 202 using a sheath actuator, as described below with reference to FIG. 6A to FIG. 7B As stated above. Figure 2On the contrary, Figure 3 , the distal end 105 of the sheath 103 has moved closer to the target area 202. Since the primary electrode 207 and the auxiliary electrode 211 have not been moved individually by manipulating the user interface (not shown), the primary electrode 207 and the auxiliary electrode 211 have moved in coordination with the sheath 103, traveling the same distance in the same direction as the sheath 103. The distal end 209 of the primary electrode 207 remains positioned just shorter than the distal end 105 of the sheath 103, and the distal end 213 of the auxiliary electrode 211 remains positioned just inside the distal end 209 of the primary electrode 207.

[0052] See also Figure 4 Once the main electrode 207 extends from the sheath 103 into the target area 202, the sheath 103, the main electrode 207, and the auxiliary electrode 211 are positioned. In various embodiments, when the main electrode 207 extends beyond the distal end 105 of the sheath 103, the auxiliary electrode 211 moves in coordination with the main electrode 207. Thus, the auxiliary electrode 211 moves in the same direction and the same distance as the main electrode 207, as shown in FIG. Figure 4 The distal end 213 of the auxiliary electrode 211 remains positioned just inside the distal end 209 of the main electrode 207 .

[0053] See also Figure 5 Once the auxiliary electrode 211 extends from the main electrode 207, the sheath 103, the main electrode 207, and the auxiliary electrode 211 are positioned. The distal end 213 of the auxiliary electrode 211 is deployed from the main electrode 207 at a position across the target area 202. In a specific embodiment, the auxiliary electrode 211 is configured as a coilable wire that is constrained in a straightened form within the main electrode 207. The auxiliary electrode 211 can be formed of an alloy such as nitinol, nickel-titanium alloy, or other "memory" alloy to restore a specific shape after being released from a restricted position. Once the user interface 102 ( Figure 5 When the auxiliary electrode 211 is manipulated to extend independently from the main electrode 207, a portion of the auxiliary electrode 211 is coiled. Thus, the distal end 213 of the auxiliary electrode 211 spirals into the tissue at the target area 202. The spiral entry of the distal end 213 of the auxiliary electrode 211 can help fix the position of the distal end 213 of the auxiliary electrode 211 during treatment.

[0054] Still see Figure 5, the insulating portion 515 of the auxiliary electrode 211 stops at a position shorter than the distal end 213 of the auxiliary electrode 211. The insulator 515 electrically insulates the auxiliary electrode 211 from the main electrode 207, so that when current is applied to the proximal ends (not shown) of the main electrode 207 and the auxiliary electrode 211, the current can flow only between the distal end 209 of the main electrode 207 and the non-insulated distal end 213 of the auxiliary electrode 211.

[0055] As will be described further below, various embodiments of the user interface 102 facilitate moving the primary electrode 207 and the auxiliary electrode 211 in coordination with the sheath 103 when the sheath is positioned adjacent to the target area 202, as shown in FIG. Figure 3 Various embodiments of the user interface also facilitate coordinated movement of the primary electrode 207 and the auxiliary electrode 211 as they extend beyond the distal end 105 of the sheath 103, as shown in reference Figure 4 To this end, various embodiments of the user interface 102 can prevent the auxiliary electrode 211 from moving independently of the primary electrode 207 until the primary electrode 207 extends beyond the distal end 105 of the sheath 103. Once the primary electrode 207 is extended, various embodiments of the user interface facilitate moving the auxiliary electrode 211 independently of the primary electrode 207 to allow for separate positioning of the auxiliary electrode, as described with reference to Figure 5 Additionally, once the primary electrode 207 is deployed at a desired location, various embodiments of the user interface may prevent movement of the primary electrode 207 when the secondary electrode 211 is deployed separately and / or once the secondary electrode 211 is at a desired location. FIG. 6A to FIG. 2 0 explains an embodiment of the user interface 102 for coordinating the movement of the sheath 103 and the electrodes 207 and 211.

[0056] See also Fig. 6A and Figure 6B , the user interface 102 includes a sheath actuator 604 for positioning the distal end 105 of the sheath 103, as previously described with reference to Figure 3 The user interface 102 is coupled to the electrosurgical device 118 using the coupling 150, as previously described with reference to Figure 1 The electrosurgical device 118, such as a bronchoscope or another minimally invasive device for performing diagnostic or therapeutic tasks, delivers the sheath 103 to the body near the target area 202 ( Fig. 6A and Figure 6B (not shown).

[0057] See again Fig. 6A, the user interface 102 includes a sheath actuator 604 and a sheath lock 606, which is configured to move the sheath 103 to position the distal end 105 of the sheath 103 at a desired position relative to the target area 202. In some embodiments, the sheath actuator 604 can be a slidable mechanism incorporating a slidable sleeve 612. At one end, the slidable sleeve 612 is slidably received within a collar 614 located at the end of the housing 610 of the user interface 102. At the opposite end, the slidable sleeve 612 engages with the coupler 150. The slidable sleeve 612 can be locked in place at the collar 614 by the sheath lock 606. The sheath lock 606 may include a thumbscrew, a spring-loaded locking pin, or another mechanism configured to mechanically engage the slidable sleeve 612 to secure the slidable sleeve 612, and in turn the sheath 103, in place at the desired position. In some other embodiments, the sheath actuator 604 can, for example, be part of the electrosurgical device 118. Any such embodiments of the sheath actuator 604 can facilitate movement of the sheath 103, as further described below.

[0058] See also Figure 6B , before engaging the sheath actuator 604 to extend the sheath 103, the sheath 103 and the primary electrode 207 and the auxiliary electrode 211 received therein are positioned near the target area 202, such as Figure 2 shown.

[0059] See also Fig. 7A and Figure 7B , manipulation of the sheath actuator 604 illustrates how the sheath 103 may be unlocked and moved to the position as previously described with reference to Figure 3 Examples in the locations described. Fig. 7A and Figure 7B In the illustrated configuration, the sheath actuator 604 has been manipulated to enable the sheath 103 to move a distance 719 closer to the target area 202. Specifically, the sheath lock 606 of the sheath actuator 604 is released to enable the slidable sleeve 612 to move within the loop 614. The housing 610 of the user interface 102 is then moved a distance 719 relative to the electrosurgical device 118 to move the sheath 103 the same distance 719 toward the target area 702. Once the distal end 105 of the sheath 103 reaches the desired position relative to the target area 202, the slidable sleeve 612 can be locked in place at the loop 614 by the sheath lock 606. In various embodiments of the user interface 102, the electrodes 207 and 211 move with the housing 610 such that when the housing 610 is moved to reposition the sheath 103, the electrodes 207 and 211 move in coordination with the sheath 103. Thus, as shown in FIG. Figure 7BAs shown, when the distal end 105 of the sheath 103 is advanced toward the target area 202, the electrodes 207 and 211 move with the sheath 203. Figure 6B As shown, the distal end 209 of the main electrode 207 is retained within the distal end 105 of the sheath 103 , and the distal end 213 of the auxiliary electrode 211 is retained within the distal end 209 of the main electrode 207 .

[0060] See also Figure 8 In the exemplary sheath actuator 604 and sheath lock 606, a slidable sleeve 612 is slidably received within a collar 614 of a housing 610. The slidable sleeve 612 may be fixedly attached to a coupling 150 that couples the user interface 102 to an electrosurgical device ( Figure 8 not shown) joined. Figure 8 The sheath lock 606 in the embodiment of the present invention is a thumbscrew that can be loosened to allow the collar 614, which can be fixedly attached to the coupling 150, to move so that the sheath ( Figure 8 ) moves, as previously referred to FIG. 6A to FIG. 7B After the housing 610 is manipulated to slide the collar 614 relative to the slidable sleeve 612 to move the distal end 105 of the sheath 103 to a desired position, such as with reference to Figure 7B As described, the sheath lock 606 is reengaged, such as by turning a thumbscrew, to secure the position of the sheath.

[0061] See also Fig. 9 , the sheath 103 and the electrodes 207 and 211 extend through the slidable sleeve 612. Thus, movement of the housing 610 to which the sheath 103 and the electrodes 207 and 211 are operably coupled results in movement of the sheath 103 and the electrodes 207 and 211. The distal end 907 of the sheath lock 606 extending through the collar 614 mechanically engages the slidable sleeve 612 to control movement of the slidable sleeve 612. Releasing the sheath lock 606, such as by loosening a thumbscrew, allows the slidable sleeve 612 to slidably move relative to the collar 614 by moving the housing 610, as described with reference to FIG. Fig. 7A Securing the sheath lock 606, such as by tightening a thumbscrew, mechanically secures the slidable sleeve 612 in position relative to the collar 614, thereby preventing further movement of the slidable sleeve 612, thereby securing the distal end 105 of the sheath 103 in position.

[0062] See also Fig.10 In various embodiments, the user interface 102 includes a user interface for positioning the sheath 103 and the electrodes 207 and 211 (neither of which is shown in FIG. Fig.101001 or a control surface thereof. The user interface 102 includes a housing 610 that supports components that move parallel to the axis 1001 or rotate about the axis 1001 along a curve 1003, as further described below. The user interface 102 includes a sheath actuator 604 that includes a collar 614 and a sheath lock 606 that receives a slidable sleeve 612 (fully received within the collar 614, and thus Fig.10 The sheath actuator 604 couples the housing 610 to the connector 150, which in turn couples the user interface 102 to the electrosurgical device ( Fig.10 As described in more detail further below, the user interface 102 includes a control main electrode 207 ( Fig.10 The main actuator 1010 for moving the auxiliary electrode 211 (not shown) and the auxiliary electrode 211 ( Fig.10 An auxiliary actuator 1020 for movement of (not shown).

[0063] The main actuator 1010 includes a depressible actuator lock 1012 extending through an actuator opening 1014 in the main actuator 1010. The main actuator 1010 is slidably engaged with the housing 610. The actuator lock 1012 can be hingedly or flexibly mounted on the main actuator 1010. Depressing the actuator lock 1012 causes the actuator lock 1012 to partially move through the actuator opening 1014 and a corresponding opening or recess in the housing 610 ( Fig.10 1001 ) to disengage the primary actuator 1010 from the housing 610. Thus, depressing the actuator lock 1012 allows the primary actuator 1010 to slide along the axis 1001, as further described below. The auxiliary actuator 1020 includes an actuator knob 1022 that can be engaged to rotate the auxiliary actuator 1020 about the axis 1001 through the curve 1003, as also further described below. As further described below, in various embodiments, the actuator interlock restricts movement of the auxiliary actuator 1020 until the primary actuator 1010 moves to rotate the primary electrode 207 ( Fig.10 1020 is extended, and once the auxiliary actuator 1020 moves to extend the auxiliary electrode 211, the actuator interlock device limits the movement of the main actuator 1010.

[0064] See also Fig.11 , various components of the user interface 102, including portions of the housing 610, the primary actuator 1010, and the auxiliary actuator 1020, illustrate the interrelationship of the components in various embodiments. Fig.10) includes a first housing portion 1131 and a second housing portion 1133. The housing portions 1131 and 1133 have a hollow interior to accommodate other components arranged therein and allow the other components to move. The first housing portion 1131 internally supports a locking rack 1128 that engages with the actuator lock 1012. More specifically, the locking rack 1128 includes a recessed portion having an opening facing inward into the housing 610 to allow selective engagement with the actuator lock 1012. The second housing portion 1133 may also include a depth scale 1134 that can be used to visually measure the position of the main electrode 207 based on the position of the main actuator 1010 relative to the housing 610. The second housing portion 1133 supports the sheath lock 606 by a thread, which is part of the sheath actuator 604, as previously described with reference FIG. 6A to FIG. 9 The housing portions 1131 and 1133 are attachable by adhesive or fasteners such as screws ( Fig.11 The matable parts that are engaged (not shown).

[0065] In various embodiments, the main actuator portions 1111 and 1113 are slidably received around the housing portions 1131 and 1133. The main actuator portions 1111 and 1113 have generally hollow interiors to slidably receive the housing portions 1131 and 1133 therebetween. The first main actuator portion 1111 defines an actuator opening 1014 that receives the actuator lock 1012. The actuator lock 1012 has a base 1124 that can be securely fixed to the first main actuator portion 1111, and when the actuator lock 1012 is pressed, the actuator lock 1012 partially rotates around the base into an opening or recess in the housing 610 ( Fig.11 At the end opposite the base 1124, the actuator lock 1012 also supports a pin support 1126 that holds a pin 1127 that engages a locking rack 1128 of the first housing portion 1131 when the actuator lock 1012 is not depressed.

[0066] In various embodiments, the actuator lock 1012 is biased to a locked position, wherein the pin support 1126 causes the pin 1127 to engage the locking rack 1128 when the actuator lock 1012 is released. The actuator lock 1012 can be biased due to the rigidity of the actuator lock 1012, so that the actuator lock 1012 returns to its undeformed position when the actuator lock 1012 is released. Alternatively, the actuator lock 1012 can be spring loaded by a spring actuator (not shown) positioned between the actuator lock 1012 and the housing 610. The main actuator portions 1111 and 1113 can be attached by adhesive or fasteners such as screws ( Fig.11 not shown) joined.

[0067] Another part of the main actuator 1010 is an auxiliary actuator guide, which is composed of guide portions 1151 and 1153 that can be connected to the main actuator portions 1111 and 1113. Fig. 22 and Fig.23 Describing in more detail, the guide portions 1151 and 1153 may be joined at their ends to form an annular tube and define a spiral channel between their respective edges that receives the guide members 1136 and 1138 extending outwardly from the auxiliary actuator portions 1121 and 1123. Fig.10 As the auxiliary actuator 1020 rotates about the axis 1001 through the curve 1003 , engagement of the guide members 1136 and 1138 with the spiral channel defined by the edges of the guide portions 1151 and 1153 causes the auxiliary actuator 1020 to advance along the axis 1001 .

[0068] In various embodiments, the auxiliary actuator portions 1121 and 1123 are rotatably mounted between the housing portions 1131 and 1133. The auxiliary actuator portions 1121 and 1123 are generally hollow to accommodate other components of the user interface 102 therebetween. As previously described, each of the auxiliary actuator portions 1121 and 1123 outwardly supports a guide member 1136 and 1138 that engages a spiral channel defined by the edges of the guide portions 1151 and 1153. The ends 1129 and 1139 of the respective auxiliary actuator portions 1121 and 1123 are shaped to engage the actuator knob 1022 for rotating the auxiliary actuator 1020, as will be described below with reference to Fig.16A and Fig.17A As further described, the auxiliary actuator portions 1121 and 1123 may be secured to the substrate by adhesive or fasteners such as screws ( Fig.11 not shown) joined.

[0069] In various embodiments, the primary actuator 1010 and the auxiliary actuator 1020 include an actuator interlock to control the relative movement of the actuators 1010 and 1020. In various embodiments, the first auxiliary actuator half 1121 can support a recess 1137 and a locking member 1139 to control the relative movement of the primary actuator 1010 and the auxiliary actuator 1020. The recess 1137 can be configured to receive a pin support 1126 extending from the actuator lock 1012 so that the actuator lock 1012 can be pressed to advance the primary actuator 1010. However, after moving the primary actuator 1010, releasing the actuator lock 1012, and rotating the auxiliary actuator 1020, the rotation of the auxiliary actuator 1020 causes the recess 1137 to be displaced from under the pin support 1126. Due to the displacement, the actuator lock 1012 is no longer depressible because the body of the auxiliary actuator 1020 blocks the pin support 1126, thereby preventing depression of the actuator lock 1012. However, after the auxiliary actuator 1020 returns to its starting position, the recess 1137 rotates again under the pin support 1126, thereby allowing the actuator lock 1012 to be depressed to allow the main actuator 1010 to move.

[0070] Similarly, to prevent the auxiliary actuator 1020 from rotating before the main actuator 1010 is moved to deploy the primary electrode 207, the locking member 1139 can engage a recess (not shown) in the housing 610. After the actuator lock 1012 is pressed and the main actuator 1010 is moved relative to the housing 610 to deploy the primary electrode 207, the locking member 1139 leaves the housing 610. It should be noted that the recess 1137 will continue to receive the pin support 1126, continuing to prevent the auxiliary actuator 1020 from rotating as long as the actuator lock 1012 is pressed. Once the actuator lock 1012 is disengaged, the auxiliary actuator 1020 can rotate to deploy the auxiliary electrode 211 and prevent the actuator lock 1012 from engaging to allow movement of the main actuator 1010. Therefore, in summary, the actuator interlock ensures that the main actuator 1010 is moved to deploy the primary electrode 207 before the auxiliary actuator 1020 can rotate. Then, once the primary actuator 1010 moves to deploy the primary electrode 207 and the auxiliary actuator 1020 rotates from its starting position, the actuator interlock prevents the primary actuator 1010 and primary electrode 207 from moving until the auxiliary actuator 1020 moves to retract the auxiliary electrode 211 to its initial position.

[0071] The user interface 102 also includes a sheath mount 1135 that can be received between the housing portions 1131 and 1133 to mechanically engage the housing 610 with the sheath 103. FIG. 6A to FIG. 9As described above, movement of the housing 610 extends or retracts the sheath 103. The user interface also includes an electrode slider coupled to the respective electrodes 207 and 211. The main electrode slider 1145 can be mechanically engaged by the main actuator portions 1113 and 1133, so that sliding the main actuator 1010 advances or retracts the main electrode slider 1145 to advance or retract the main electrode 207, respectively. The auxiliary electrode slider ( Fig.11 1144 and 1145. The auxiliary electrode slider (not shown) is slidably received in the main electrode slider 1145. Since the auxiliary actuator portions 1121 and 1123 are rotatably movable, as further described below, the auxiliary electrode slider can also be rotatably received between the auxiliary actuator portions 1121 and 1123.

[0072] The flexible harness 1150 is configured to be Fig.11 ) receives an electrical conductor 130 (not shown) at a port on the Figure 1 ) and are electrically connected to flexible leads 1152 and 1154, each of which is connected to one of electrodes 207 and 211. Flexible leads 1152 and 1154 are configured to maintain electrical connection with electrodes 207 and 211 when the proximal ends of electrodes 207 and 211 move within user interface 102.

[0073] In addition, the flexible fluid coupling 1160 is connected from the fluid port ( Fig.11 The fluid port is connected to the infusion pump 116 (not shown) at the housing 610 to extend into the interior of the main electrode slider 1145 to deliver fluid to the lumen defined in the main electrode 207. Figure 1 ) receiving tube 132 to receive the conductive fluid flow. A flexible fluid coupling 1160 may be coiled within housing 610 to allow the fluid coupling 1160 to extend and contract as the main electrode slider 1145 moves relative to housing 610.

[0074] As referenced below Fig. 27 and Fig.28 As further described, the coupler 150 includes a slidable locking body 1180 that is slidably received between a slidable mount 1182 and a retaining ring 1184. The slidable mount 1182 is coupled to the housing 610. As further described below, once the housing 610 is positioned to engage the electrosurgical device 118 ( Fig.11 ), the locking body 1180 slides into place to secure the connection, as shown in FIG. Fig. 27 and Fig.28 Further described.

[0075] See also FIG. 12A to FIG. 21B, describes the operation of the user interface 102 and the corresponding movement of the sheath 103, the primary electrode 207 and the auxiliary electrode 211.

[0076] See also Fig. 12A and Fig. 12B , the distal end 105 of the sheath 103 is positioned adjacent to the target area 202. As previously described with reference FIG. 6A to FIG. 7B As described, in various embodiments, the sheath actuator 604 enables the sheath 103 to be positioned by releasing the sheath lock 606 and moving the housing 610. For example, see again FIG. 6A to FIG. 7B , the position of the sheath 103 is controlled by sliding the slidable sleeve 612 within the collar 614 and then securing the sheath 103 in the desired position by reengaging the sheath lock 606. When the distal end 105 of the sheath 103 is deployed adjacent to the target area 202, the distal end 209 of the primary electrode 207 is just within the distal end 105 of the sheath 103. At the same time, the distal end 213 of the auxiliary electrode 211 is just within the distal end 209 of the primary electrode 207. With the distal end 105 of the sheath 103 positioned adjacent to the target area 202, the user interface 102 can be used to move the electrodes 207 and 211 to the desired position.

[0077] See also Fig.13A and 13B According to various embodiments, positioning electrodes 207 and 211 begins by depressing actuator lock 1012 to enable movement of primary actuator 1010. Depressing actuator lock 1012 to move actuator release 1012 in direction 1301 disengages primary actuator 1010 from housing 610. Specifically, depressing actuator lock 1012, which is hingedly or rotatably coupled to primary actuator 1010 at base 1124, causes pin support 1126 to move pin 1127 from an inwardly facing recess of locking rack 1128 on housing 610. With pin 1127 removed from locking rack 1128, primary actuator 1010 is able to move relative to housing 610 to move primary electrode 207, as described with reference to FIG. Fig.14A and Fig. 14B described.

[0078] As previously described, the auxiliary actuator 1020 is rotatably engaged with the main actuator 1020. Therefore, even when the actuator lock 1012 is released to release the main actuator 1010 from the housing 610, the auxiliary actuator 1020 remains engaged with the main actuator 1010. Therefore, pressing the actuator lock 1012 releases the main actuator 1010 and the auxiliary actuator 1020 to move together, thereby enabling the main electrode 207 and the auxiliary electrode 211 to move together.

[0079] See also Fig.14A and Fig. 14B, when the user continues to press the actuator lock 1012 in the direction 1301, the primary actuator 1010 moves in the direction 1401. As previously described, since the auxiliary actuator 1020 remains (rotatably) engaged with the primary actuator 1010, the primary actuator 1010 and the auxiliary actuator move together the same distance in the direction 1401, as shown in FIG. Fig.14A shown.

[0080] Due to the joint movement of the main actuator 1010 and the auxiliary actuator 1020, the main electrode 207 and the auxiliary electrode 211 also move together. Fig. 14B As shown, the distal end 209 of the primary electrode 207 and the distal end 213 of the auxiliary electrode 211 move together beyond the distal end 105 of the sheath 103 into the target area 202. Therefore, due to the engagement of the auxiliary actuator 1020 with the primary actuator 1010, depressing the actuator lock 1012 and moving the primary actuator 1010 causes the two electrodes 207 and 211 to move together.

[0081] As previously referenced Fig.11 As described, with the actuator lock 1012 depressed, in various embodiments, the pin support 1026 on the actuator release 1012 engages the auxiliary actuator 1020, thereby preventing the auxiliary actuator 1020 from rotating until the actuator release 1012 is disengaged. Also as previously described, the auxiliary actuator 1020 may include a locking member 1139 that abuts the housing 610. This arrangement prevents the auxiliary actuator 1020 from rotating until the actuator lock 1012 is depressed and the primary actuator 1010 and the auxiliary actuator 1020 are advanced.

[0082] See also Fig.15A and Fig. 15B Once the distal end 209 of the primary electrode 207 and the distal end 213 of the auxiliary electrode 211 are respectively advanced into the target area 202, the actuator lock 1012 is released. Since the actuator lock 1012 is biased by its stiffness or by a spring, as shown in FIG. Fig.11 As described above, releasing the actuator lock 1012 thus causes the actuator lock 1012 to move in direction 1501. Movement of the actuator lock 1012 causes the primary actuator 1010 and the rotatably engaged auxiliary actuator 1020 to reengage with the housing 610, thereby holding the electrodes 207 and 211 in place. Fig.11As described, when the actuator lock 1012 is released, the pin 1127 mounted in the pin support 1026 moves into a recess in the locking rack 1128 mounted on the housing 610. Thus, the engagement of the pin 1127 with the locking rack 1128 prevents further movement of the primary actuator 1010 until the actuator lock 1012 is further engaged by the user. Thus, as the user releases the actuator lock 1012, the distal ends 209 and 213 of the primary electrode 207 and the auxiliary electrode 211 are fixed in the positions to which they were moved, as shown in reference Fig.14A and Fig. 14B described.

[0083] See also Fig.16A and Fig. 16B , with the primary actuator 1010 held in place by the user releasing the actuator lock 1012, the auxiliary actuator 1020 is rotated to move the auxiliary electrode 211 independently of the primary electrode 207. Fig.16A As shown, the auxiliary actuator 1020 is moved by the user rotating the actuator knob 1022 in the direction 1601. As previously described with reference to Fig.11 As described, the auxiliary actuator 1020 supports guide members 1136 and 1138, which are received in a spiral channel defined between the edges of the guide portions 1151 and 1153. With the auxiliary actuator 1020 engaged with the spiral channel defined by the guide portions 1151 and 1153, rotation of the actuator knob 1022 results in spiral movement of the auxiliary actuator 1020. Rotation of the auxiliary actuator 1020 thus causes the auxiliary actuator 1020 to advance in the direction 1602 relative to the main actuator 1010 and the housing 610.

[0084] See also Fig. 16B , the movement of the auxiliary actuator 1020 causes the distal end 213 of the auxiliary electrode 211 to extend beyond the distal end 207 of the main electrode 209. As previously described with reference Figure 5 As described, the distal end 213 of the auxiliary electrode 211 can be preformed into a coiled shape so that once the auxiliary electrode 211 is no longer constrained within the lumen of the primary electrode 207, the auxiliary electrode 211 forms the coiled shape. In various embodiments, the coiled shape at the distal end 213 of the auxiliary electrode 211 spirals into the tissue of the target area 202, which fixes the auxiliary electrode 211 and the primary electrode 207 through which it extends in place at the target area 202. The insulating portion 515 of the auxiliary electrode 211 electrically insulates the auxiliary electrode 211 from the primary electrode 207, except between their respective distal ends 213 and 209. With the distal ends 213 and 209 of the electrodes 211 and 207 deployed, as previously described, a supply of conductive fluid and / or current can be applied to the target area 202 to achieve treatment.

[0085] The actuator interlock presented by the configuration of the actuators 1010 and 1020 prevents a user from moving the primary actuator 1010 once the secondary actuator 1020 is rotated from its initial position. Fig.11 As described above, rotating the auxiliary actuator 1020 blocks the pin support 1126 of the actuator lock 1012, thereby preventing the user from depressing the actuator lock 1012 to release the main actuator 1010 from its engagement with the housing 610 via the pin 1127 and the locking rack 1128. Therefore, when the auxiliary actuator 1020 moves to extend the distal end 213 of the auxiliary electrode 211 into the target area 202, the distal end 209 of the main electrode 207 remains in the proper position when inserted into the target area 202.

[0086] refer to FIG. 6A to FIG. 7B and FIG. 12A to FIG. 16B Deployment of the sheath 103 and electrodes 207 and 211 is described to allow for application of therapy. In contrast, to withdraw and remove the electrodes 207 and 211 from the target area 202, the manipulation and manipulation sequence of the user interface 102 is reversed, as described with reference to FIG. 17A to FIG. 21B described.

[0087] See also Fig.17A and Fig. 17B , the distal end 213 of the auxiliary electrode 211 is retracted into the main electrode 207 by the user rotating the actuator knob 1022 in the direction 1701. The direction 1701 in which the actuator knob 1022 is rotated to retract the distal end 213 of the auxiliary electrode 211 from the target area 202 is opposite to the direction 1601 in which the actuator knob 1022 is rotated to extend the distal end 213 of the auxiliary electrode 211. The rotation of the actuator knob 1022 causes the auxiliary actuator 1020 to move in the opposite spiral direction, thereby causing the auxiliary actuator 1020 to translate in the direction 1702 relative to the main actuator 1010 and the housing 610. The movement of the auxiliary actuator 1020 causes the auxiliary electrode 211 to be withdrawn until the distal end 213 of the auxiliary electrode 211 is again received within the distal end 209 of the main electrode 207. As the auxiliary actuator 1020 moves to its initial position relative to the primary actuator 1010, the actuator lock 1012 may now be released, as shown in FIG. Fig.18A It should be understood that retraction of the auxiliary electrode 211 is achieved by rotating the auxiliary actuator 1020 while the main actuator 1010 remains stationary.

[0088] See also Fig.18A and Fig.18B, in order to prepare to retract the main electrode 207 from the target area 202, the user presses the actuator lock 1012 in the direction 1801. Pressing the actuator lock 1012 does not cause any movement of the distal ends 209 and 213 of the electrodes 207 and 211, respectively, as when the actuator lock 1012 is pressed as previously described with reference to Fig.13A and Fig. 13B as well as Fig.15A and 15B The engagement of the actuator lock 1012 when depressed and released does not result in the same movement of the electrodes 207 and 211.

[0089] See also Fig.19A and 19B , with the actuator lock 1012 depressed, the primary actuator 1010 moves in direction 1901 to withdraw the distal end 209 of the primary electrode 207 from the target area 202. As previously described with reference Fig.14A and Fig. 14B As described, since the auxiliary actuator 1020 remains rotationally engaged with the main actuator 1010, the auxiliary actuator 1020 also moves the same distance in the same direction 1901 as the main actuator 1010. Therefore, the distal ends 209 and 213 of the electrodes 207 and 211 move together and are withdrawn from the target area 202. After the main actuator 1010 is fully retracted in the direction 1901, the distal end 209 of the main electrode 207 is received within the distal end 105 of the sheath. In addition, since the auxiliary actuator 1020 and therefore the auxiliary electrode 211 move in coordination with the main actuator 1010, when the distal end 209 of the main electrode 207 is withdrawn within the distal end 105 of the sheath 103, the distal end 213 of the auxiliary electrode 211 remains within the distal end 209 of the main electrode 207.

[0090] See also Fig. 20A and Fig. 20B Once the distal ends 209 and 213 of the electrodes 207 and 211 are withdrawn from the distal end 105 of the sheath 103, the actuator lock 1012 is released. When the actuator lock 1012 is released, the actuator lock 1012 moves in the direction 2001. As a result, the pin 1127 held by the pin support 1126 reengages the locking rack 1128 to hold the main actuator 1010 in place. In addition, as previously described, when the actuators 1010 and 1020 have been restored as described in reference Fig. 12A and Fig. 12B When in the described starting position, the auxiliary actuator 1020 is prevented from rotating by an actuator interlock, such as by a locking member 1139 extending from the auxiliary actuator 1020 engaging the housing 610 to prevent the auxiliary actuator 1020 from rotating.

[0091] See also Fig.21A and Fig. 21B, when the distal ends 209 and 211 of the electrodes 207 and 211 are withdrawn within the distal end 105 of the sheath 103, the sheath 103 itself can be withdrawn. Fig. 7A and Figure 7B In the reverse operation shown, the sheath lock 606 is released and the housing 610 moves along the slidable sleeve 612 in the direction 2101 away from the coupling 150. Since the primary actuator 1010 is locked to the housing by the actuator lock 1012 and the auxiliary actuator 1020 is rotatably fixed to the primary actuator 1010, the primary actuator 1010 and the auxiliary actuator 1020 move in coordination with the housing 610 in the direction 2101. The sheath 103 and the insertion tube 119 ( Figure 1 ) is withdrawn from the body. Alternatively, as referenced Fig.21A and Fig. 21B As described above, without removing the sheath, once FIG. 19A to FIG. 20B By withdrawing the electrodes 207 and 211 into the sheath, the sheath 103 can be withdrawn from the body without first withdrawing the sheath 103 by engaging the sheath lock 606 .

[0092] As previously referenced Fig.11 , Fig.16A and Fig.17A As described, auxiliary actuator 1020 supports guide members 1136 and 1138 that engage the spiral channel defined by the edges of guide portions 1151 and 1153. Fig. 22 , guide portions 1151 and 1153 fit together into guide sleeve 2202 when engaged with main actuator 1010. Guide portions 1151 and 1153 may be engaged at ends 2215 and 2217. Specifically, as Fig.23 As shown, socket 2330 may be supported by guide portions 1151 and 1153 such that the guide portions can be connected by screws, dowels or other fasteners.

[0093] The edges 2211 and 2213 of the guide portions 1151 and 1153 define a helical channel 2201 between the ends 2215 and 2217 of the guide sleeve 2202. The helical channel 2201 guides the movement of the support members 1136 and 1138 so that the auxiliary actuator 1020 translates in response to the rotation of the auxiliary actuator, as shown in FIG. Fig.16A and Fig.17A described.

[0094] In various embodiments, the generally spiral channel 2201 has a varying pitch between the ends 2215 and 2217 of the guide cannula 2202. In various embodiments, the pitch can vary from the rear end 2215 toward the front end 2217, where the auxiliary actuator 1020 begins its spiral motion to extend the auxiliary electrode 207. More specifically, in various embodiments, the pitch of the spiral channel is varied to reduce the amount of rotation of the auxiliary actuator 1020 along the user interface 102 ( Fig. 22 The travel distance of the axis 1001 (not shown).

[0095] In various embodiments, the pitch is varied in this manner to reduce the rotational force applied by the user when turning the actuator knob 1022 to actuate the auxiliary actuator 1020. For example, consider Figure 5 and Fig. 16B , as the distal end 213 of the auxiliary electrode 211 is advanced into the target area 202, the distal end 213 of the auxiliary electrode 211 may encounter increased resistance. Part of this resistance is caused by the distal end 213 of the auxiliary electrode 211 frictionally engaging the mass in the target area along the increased length of the auxiliary electrode 211 as the longer portion of the auxiliary electrode 211 extends further beyond the distal end 209 of the main electrode 207. Part of this resistance may also be caused by the curvature of the coil at the distal end 213 of the auxiliary electrode 211 spiraling into the mass at the target area 202 encountering an increased degree of resistance. Accordingly, greater force may be involved in beginning to withdraw the auxiliary electrode 211 to frictionally engage a greater mass of tissue than when the auxiliary electrode 211 is closer to fully retracted into the distal end 209 of the main electrode 207. Additionally, when a portion of the auxiliary electrode 211 near the distal end 213 is formed into a coiled shape using a memory alloy, withdrawing the auxiliary electrode 207 may involve applying additional force in an attempt to pull the auxiliary electrode into the deformed, straightened shape that it exhibits when the auxiliary electrode 211 is confined within the main electrode 207.

[0096] Thus, when deploying the auxiliary electrode 211, as the auxiliary electrode 211 extends further beyond the distal end 209 of the main electrode 207 into the target area 202, greater forces may be involved in extending the auxiliary electrode 211. Thus, when the auxiliary actuator 1020 moves toward the front end 2217 of the guide sleeve 2202, a greater degree of rotational force may be involved in rotating the actuator knob 1022 of the auxiliary actuator 1020. Accordingly, a greater force may be involved in withdrawing the initial portion of the auxiliary electrode 211 than when the auxiliary electrode 211 has been or has almost been completely retracted into the main electrode 207. Thus, when the auxiliary actuator 1020 first moves away from the front end 2217 of the guide sleeve 2202, a greater degree of rotational force may be involved in rotating the actuator knob 1022 of the auxiliary actuator 1020.

[0097] According to various embodiments, the pitch of the spiral channel 2201 can vary between the rear end 2215 and the front end 2217 of the guide cannula 2202. Specifically, the pitch of the spiral channel 2201 can vary to reduce the distance traveled by the second actuator 1020 along the axis 1001 per unit rotation of the front end of the guide cannula 2202 facing the user interface 2202 toward the front end 2217 around the axis 1001 through the curve 1003. By reducing the distance traveled by the second actuator 1020 toward the front end of the guide cannula 2202, the increased force along the axis 1001 is effectively distributed over a greater degree of rotation of the second actuator 1020. Therefore, while the lateral resistance to the movement of the auxiliary electrode 211 along the axis 1001 can be increased at the front end 2217 of the guide cannula 2202, the force involved in rotating the actuator knob 1022 to rotate the auxiliary actuator 1020 does not increase as much.

[0098] See also Fig.23, since the pitch of the spiral channel 2201 is defined by the edges 2211 and 2213 of the guide portions 1151 and 1153, respectively, the pitches of the edges 2211 and 2213 are varied to define the desired shape of the spiral channel 2201. For example, considering the first guide portion 1153, toward the rear end 2345 of the first guide portion 1153, at a first point 2301, the pitch angle α of the edge 2213 (as measured tangentially to the edge 2213 relative to the axis 1001) is greater than the pitch angle β at a second point 2302 moving toward the front end 2347 of the first guide portion 1153. Similarly, the pitch angle β at the second point 2302 is greater than the pitch angle γ at a third point 2303 moving further toward the front end 2347 of the guide portion 1153. The corresponding arrangement is repeated with the second guide portion 1151, wherein the pitch angle along the edge 2211 becomes smaller when moving from the rear end 2341 toward the front end 2343 of the second guide portion 1151. Thus, although the resistance along the axis 1001 increases, the rotational resistance applied to the auxiliary actuator 1020 is reduced by the spiral channel 2201 (defined by the reduced pitch of the edges 2211 and 2213 of the respective guide portions 1151 and 1153) Fig. 22 ) decreases with the decrease of the pitch.

[0099] In addition to changing the pitch of the spiral channel 2201 to facilitate the deployment and withdrawal of the auxiliary electrode 207, the cross-section of the wire used as the auxiliary electrode 207 can also facilitate the deployment and withdrawal of the auxiliary electrode 207. Figure 24 to Figure 26 , the auxiliary electrode 207 may include a wire having portions 2410 and 2420 having different thicknesses along its length.

[0100] See also Fig.24 , the first portion 2410 of the auxiliary electrode 207 may have a circular cross-section having a first thickness 2412. The second portion 2420 leading to the distal end 213 of the auxiliary electrode 211 may have a flat or rectangular cross-section having a second thickness 2422 that is less than the first thickness 2412. In an exemplary embodiment, the first thickness 2412 of the circular cross-section of the first portion 2410 may be 0.015 inches, and the second thickness 2422 of the second portion may be 0.009 inches. In such a configuration, the theoretical moment of inertia of the first portion 2410 is more than twice the theoretical moment of inertia of the second portion 2420. Therefore, the larger theoretical moment of inertia of the first portion 2410 should improve the force transmission of the first portion 2410 when advancing the auxiliary electrode 207 without hindering the ability of the second portion 2420 to assume its coiled configuration when deployed. The first thickness 24212 is aligned with the axis 2430, which defines the plane in which the second portion 2402 will be coiled, as shown in FIG. Fig.25 shown.

[0101] See also Fig.26 , the auxiliary electrode 211 is in an unwound configuration. The second portion 2420 may have a second width 2624 that is wider than the second thickness 2422 of the second portion 2420 and wider than the first thickness 2412 of the first portion 2410. In a non-limiting example, the first thickness 2412 may be 0.015 inches, the second thickness may be 0.009 inches, and the second width may be 0.020 inches.

[0102] The auxiliary electrode 211 having a circular cross-section in the first portion 2410 provides good column strength and force transfer for actuating the auxiliary electrode 211 along the length of the auxiliary electrode. The column strength and force transfer help drive the auxiliary electrode 211 through the lumen within the main electrode 207 and help extend the auxiliary electrode 211 into the tissue at the target area, such as Figure 5 As shown. In contrast, the second portion 2420 has a reduced thickness in the plane in which the second portion 2420 of the auxiliary electrode 211 is to be coiled, making it easier for the second portion to assume its coiled shape. Using the exemplary dimensions, the moment of inertia of the second portion 2420 is less than half of the moment of inertia of the first portion 2410, thereby reducing the force required to coil and unfold the second portion 2410. The second width 2624 having a greater width than the second thickness 2422 and greater than the first thickness 2412 improves the column strength and force transmission of the second portion 2420 to prevent the second portion 2420 from buckling, while still having a thinner second thickness 2422 that facilitates the coiling of the second portion 2420.

[0103] See also Fig. 27 , a connector for securing the user interface 102 to the electrosurgical device 118 includes a slidable mounting mechanism 2710 and a locking body 2720. In various embodiments, the slidable mounting mechanism 2710 is secured to a portion of the user interface ( Fig. 27 2795 and 2796. The slidable sleeve 612 is an extension of the housing of the device interface 2752 (not shown) and is adapted around the slidable sleeve 612. The slidable sleeve 612 has an inner width 2791 that is sized to receive the flange 2754 at the end of the device interface 2752. The outer width 2793 of the flange 2754 is smaller than the inner width 2791 of the slidable sleeve 612 so that the flange 2754 can be received within the end of the slidable sleeve 612. The outer width 2795 of the device interface 2752 is smaller than the outer width 2793 of the flange 2754 to which it is adjacent. The outer width 2795 of the device interface 2795 and the outer width 2793 of the flange 2754 are considered to be in the configuration of the locking body 2720, as described below with reference to Fig.28 Further described.

[0104] The slidable mounting mechanism 2710 includes a base portion 2712 that is fixed, fixable, or connected to the slidable sleeve 612 (the slidable mounting mechanism 2710 is Fig. 27 612). The slidable mounting mechanism 2710 also includes one or more protrusions 2714 configured to receive retaining clips 2734 extending from the retaining ring 2730 to secure the locking plate 2720 to the slidable mounting mechanism 2710, as further described below.

[0105] The slidable mounting mechanism 2710 also supports a locking pin 2716. In various embodiments, the locking pin 2716 is spring loaded or otherwise biased to extend outward from the slidable mounting mechanism 2710, thereby engaging a locking slot in the lock body 2720 to prevent the lock body 2720 from sliding. The locking pin 2716 can be manually retracted away from the lock body 2720 to allow the lock body 2720 to move to an unlocked position.

[0106] In various embodiments, the slidable mounting mechanism 2710 includes a torque transmission mechanism to move between the electrosurgical instrument or device 118 ( Figure 1 ) and the user interface 102. In various embodiments, the torque transmission mechanism includes a link 2728 that is received in the channel 2718 when the locking body 2720 is in the locked position. The link 2728 and the channel 2718 thus transmit torque between the locking body 2720 engaged with the electrosurgical instrument or device 118 and the slidable sleeve 612. The link 2718 and the channel 2728 thus absorb and / or transmit torque between the electrosurgical instrument or device 118 and the slidable sleeve 612, rather than, for example, torque applied to the retaining ring 2730 and / or the locking pin 2716. In various embodiments, torque can also be absorbed and transmitted by strengthening the locking pin 2716 and / or tightening and strengthening the mounting of the retaining ring 2730 to the locking plate 2720.

[0107] The locking body 2720 has a base plate 2722 that is configured to slide over the slidable mounting mechanism 2710 and hold the flange 2754 in place within the slidable sleeve 612 to secure the user interface 102 to the electrosurgical device 118. Fig.28As further described, the bottom plate 2722 defines an opening having differently sized portions that alternately allow the flange 2754 to be inserted into the slidable sleeve 612 and prevent the flange 2754 from being removed from the slidable sleeve 612. The locking body 2720 supports a shield 2724 that extends over the combination formed by the surgical device interface 2752 and the user interface 102 via the slidable sleeve 612. As previously described, the locking body 2720 also supports a second indication tab 2728. When the locking body 2720 is in the locked position, the second indication tab 2728 aligns with the first indication tab 2718 on the slidable mounting mechanism 2710 to provide a visual confirmation that the locking body 2720 is in the locked position.

[0108] The locking body 2720 is slidably secured to the slidable mounting mechanism using a retaining ring 2730. The retaining ring 2730 includes a ring 2732 having an inner diameter 2799 that is sized to receive a flange 2754 extending therethrough from a surgical device interface 2752. One or more retaining clips 2734 extend from the ring 2732. The retaining clips 2734 are sized to fit through slots in the bottom plate 2722 of the locking body, as described below with reference to Fig.28 As further described. Once the retaining clip 2734 extends through the slot in the bottom plate 2722 of the locking body 2720, the retaining clip is secured over and / or around the protrusion 2714 on the slidable mounting mechanism 2710. Once the retaining clip 2734 extends through the slot on the locking body 2720 and is secured to the protrusion 2714 on the slidable locking mechanism 2710, the locking body 2720 is slidably constrained to move through the slidable mounting mechanism 2710, thereby locking and unlocking the user interface 102 with the electrosurgical device 118.

[0109] See also Fig.28 , the bottom plate 2722 defines two retaining slots 2895, retaining fixture 2734 ( Fig. 27 ) extends from the retaining ring 2730 through the retaining slot. The retaining slot 2895 is sized to slidably receive the retaining clamp 2734 so that the locking body 2720 can slide across the retaining clamp 2734 in the first direction 2815 or the second direction 2817. The ring 2732 of the retaining ring 2730 is located on the bottom plate 2722 to retain the locking body 2720 to the slidable mounting mechanism 2710 ( Fig. 27 The locking body 2720 also supports at least one socket 2820 to receive the locking pin 2716 extending from the slidable locking mechanism 2710 ( Fig. 27 Socket 2820 is positioned to engage locking pin 2716 when locking body 2720 is slid into the locked position over surgical device interface 2752.

[0110] The shield 2724 extends from the locking plate 2722 to cover the connection between the surgical device interface 2752 and the user interface 102. In order to allow the locking body 2720 to be used without the shield 2724 being attached to the electrosurgical device 118 ( Figure 1 ), the lower edge 2825 of the shield 2724 is shaped to define a recess 2827. The recess 2827 receives the body of the electrosurgical device 118 when the locking body 2720 is moved in the second direction 2817 to move the locking body 2720 into the locked position.

[0111] The bottom plate 2722 of the locking body 2720 defines an opening 2810, as shown in FIG. Fig. 27 As described, the flange 2754 on the surgical device interface 2772 can be inserted into the slidable sleeve 612 through the opening. More specifically, the first portion 2801 of the opening has a first width 2811, and the combined second portion 2803 has a second width 2813. The first width 2811 of the first portion is large enough to receive the outer width 2793 of the flange 2754 therethrough, while the second width 2813 of the second portion 2803 is large enough to receive the width 2795 of the surgical device interface 2752, but does not allow the outer width 2793 of the flange 2754 to pass therethrough.

[0112] To use the electrosurgical device 118 ( Fig.28 28. The locking body 2720 slides in the first direction 2815 to position the first portion 2801 in the base portion 2712 of the slidable mounting mechanism 2710 toward the slidable sleeve 612 (not shown). Fig.28 The flange 2754 extending from the surgical device interface 2752 is then inserted through the first portion 2801 into the slidable sleeve 612. In order to fix the surgical device interface 2752 in place, the locking body is slid in the second direction 2817. Thus, the second portion 2803 moves over the opening in the base portion 2712 of the slidable mounting mechanism 2710, and the edge of the locking body 2722 slides over the flange 2754 and abuts the flange. In this locked position, the edge of the locking plate 2722 surrounding the second portion 2803 covers the flange 2754 and holds the flange 2754 in place. In addition, with the locking body 2720 in this locked position, the locking pin 2716 extends into the socket 2820. The locking pin 2716 blocks movement of the locking plate along the first direction 2815 until the locking pin 2716 is withdrawn from the socket 2820.

[0113] To decouple the user interface 102 from the electrosurgical device 118, the user engages the locking pin 2716 to slide it out of the socket 2820, thereby allowing sliding movement of the locking body 2720. With the locking pin 2716 withdrawn, the locking body 2720 slides in the first direction 2815, causing the base plate 2722 to move away from the surgical device interface 2752, with the first portion 2801 of the opening 2810 above the flange 2752. The flange 2754 of the surgical device interface 2752 can now be withdrawn through the locking body 2720, thereby ending the connection between the surgical device interface 2752 and the slidable sleeve 612 of the user interface 102.

[0114] See also Fig.29 , an exemplary method 2900 for positioning electrodes for treatment is provided. The method 2900 begins at block 2905. At block 2910, a distal end of a sheath containing a primary electrode and an auxiliary electrode is moved adjacent to a target area, as described in reference FIG. 6A to FIG. 7B At block 2920, a primary actuator operably coupled to the primary electrode and an auxiliary actuator operably coupled to the auxiliary electrode and movably engaged with the primary actuator are slid to a first position to actuate distal ends of the primary electrode and the auxiliary electrode relative to the target area, as described with reference to Fig.14A and Fig. 14B At block 2930, the auxiliary actuator is rotated relative to the primary actuator so that the auxiliary actuator travels along the spiral path to a second position independently of the primary actuator, thereby actuating the distal end of the auxiliary electrode to move relative to the target area independently of the primary electrode, as previously described with reference to Fig.16A and Fig. 16B Method 2900 ends at block 2935, where the electrodes are positioned.

[0115] See also Fig.30 , an exemplary method 3000 for actuating an instrument through a helical path having different pitches is provided. The method 3000 begins at block 3005. At block 3010, an elongated instrument is coupled at its proximal end to an actuator that is movable along an axis, as shown in reference Fig.11 At block 3020, the instrument is actuated by rotatably moving the actuator through a generally helical path about the axis, the pitch of the helical path being varied to vary the distance the actuator travels along the axis per unit rotation of the actuator, as described with reference to Fig.16A , Fig. 16B , Fig. 22 and Fig.23 Method 3000 ends at block 3025, where the actuator has moved the instrument.

[0116] See also Fig.31, an exemplary method 3100 for securing devices together is provided. The method 3100 begins at block 3105. At block 3110, a locking body is positioned in an open position, wherein the locking body defines an opening including a first portion having a first width and a second portion having a second width less than the first width. The locking body is slidably mounted on one of a first device supporting a first coupling member and a second device supporting a second coupling member. When the locking body is positioned in the open position, the first portion is disposed between the first coupling member and the second coupling member, as shown in reference Fig.28 At block 3120, a connection is formed by inserting a first coupling into a second coupling, wherein one of the first coupling and the second coupling supports a flange having a flange width that is less than the first width and greater than the second width, as described with reference to Fig.28 At block 3130, the locking body is repositioned into a closed position in which the edge of the locking body surrounding the second portion abuts the flange so that the coupling supporting the flange is prevented from being withdrawn from the connection, as previously described with reference to Fig.28 The method 3100 ends at block 3135, where the couplings are secured together by a locking body.

[0117] The subject matter disclosed in this invention includes but is not limited to the subject matter described in the following clauses:

[0118] 1. A device, comprising:

[0119] an elongated main electrode defining a lumen therein;

[0120] an elongated auxiliary electrode slidably receivable within the lumen;

[0121] a sheath configured to slidably receive the primary electrode therein, the sheath further configured to convey the primary electrode and the auxiliary electrode toward a target area;

[0122] a housing operably coupled to the sheath and movably mounted to slidably actuate the sheath relative to the target area;

[0123] a primary actuator operably coupled to the primary electrode and slidably coupled to the housing to actuate the primary electrode relative to the sheath; and

[0124] An auxiliary actuator is operably connected to the auxiliary electrode and movably connected to the main actuator so as to be able to slide with the main actuator, thereby actuating the auxiliary electrode in coordination with the main electrode, and the auxiliary actuator is capable of rotating independently of the main actuator to travel along a spiral path, thereby actuating the auxiliary electrode to move relative to the target area independently of the main electrode.

[0125] 2. The apparatus of claim 1 further comprising a primary actuator lock engageable by a user to selectively disengage the primary actuator from the housing to enable slidable movement of the primary actuator relative to the housing.

[0126] 3. The apparatus of claim 2, wherein the primary actuator lock comprises a depressible release mechanism configured to allow the primary actuator to disengage from the housing when a control mechanism is depressed, and further configured to allow the primary actuator to engage the housing when the control is released.

[0127] 4. The apparatus of claim 1, further comprising an actuator interlock configured to prevent movement of the auxiliary actuator until the primary actuator moves to a first position.

[0128] 5. The apparatus of claim 4, wherein the actuator interlock is further configured to prevent movement of the primary actuator in response to movement of the auxiliary actuator to the second position.

[0129] 6. The apparatus of claim 1 further comprising a device coupling configured to removably secure the housing to an electrosurgical device configured to deliver the sheath through a channel to a target area.

[0130] 7. The apparatus of claim 6 , wherein the device connector is configured to slidably move across a connection between the housing and the electrosurgical device from an open position to a closed position, wherein the open position allows the connection between the housing and the electrosurgical device and the closed position prevents the housing from being removed from the electrosurgical device.

[0131] 8. The apparatus according to claim 6 further includes a sheath actuator, which is configured to movably connect the housing to the device coupling so that the housing can be selectively moved relative to the device coupling and the electrosurgical device can move the distal end of the sheath relative to the target area.

[0132] 9. The apparatus of claim 1 further comprising a flexible electrical connector secured to the housing, wherein the flexible electrical connector is configured to receive a two-pole power source and electrically and movably connect the first electrode to a first pole of the power source and electrically and movably connect the second electrode to a second pole of the power source.

[0133] 10. The apparatus of claim 1, further comprising a flexible fluid coupling secured to the housing, wherein the flexible fluid coupling is configured to receive a fluid source providing a conductive fluid and to fluidically and movably couple the conductive fluid to the lumen defined by the main electrode to deliver the conductive fluid to the target area.

[0134] 11. A system for treating tissue at a target area, the system comprising:

[0135] an electrical power source configured to selectively provide electrical power between a first pole and a second pole via a two-pole cable;

[0136] An electrode control device, the electrode control device comprising:

[0137] an elongated main electrode defining a lumen therein;

[0138] an elongated auxiliary electrode slidably receivable within the lumen;

[0139] a sheath configured to slidably receive the primary electrode therein, the sheath further configured to convey the primary electrode and the auxiliary electrode toward a target area;

[0140] a housing operably coupled to the sheath and movably mounted to slidably actuate the sheath relative to the target area;

[0141] a primary actuator operably coupled to the primary electrode and slidably coupled to the housing to actuate the primary electrode relative to the sheath; and

[0142] An auxiliary actuator is operably connected to the auxiliary electrode and movably connected to the main actuator so as to be able to slide with the main actuator, thereby actuating the auxiliary electrode in coordination with the main electrode, and the auxiliary actuator is capable of rotating independently of the main actuator to travel along a spiral path, thereby actuating the auxiliary electrode to move relative to the target area independently of the main electrode.

[0143] 12. The system of claim 11 further comprising a primary actuator lock engageable by a user to selectively disengage the primary actuator from the housing to enable slidable movement of the primary actuator relative to the housing.

[0144] 13. The system of claim 12, further comprising an actuator interlock configured to prevent movement of the auxiliary actuator until the primary actuator moves to a first position.

[0145] 14. The system of claim 13, wherein the actuator interlock is further configured to prevent movement of the primary actuator in response to movement of the auxiliary actuator to the second position.

[0146] 15. The system of claim 11, further comprising a device coupling configured to removably secure the housing to an electrosurgical device configured to deliver the sheath through a channel to a target area.

[0147] 16. A system according to claim 15, wherein the device connector is configured to slidably move across the connection between the housing and the electrosurgical device from an open position to a closed position, wherein the open position allows the connection between the housing and the electrosurgical device and the closed position prevents the housing from being removed from the electrosurgical device.

[0148] 17. The system of claim 15, further comprising a sheath actuator movably configured to movably couple the housing to the device coupling so that the housing can be selectively moved relative to the device coupling and the electrosurgical device can move the distal end of the sheath relative to the target area.

[0149] 18. The system of claim 11, further comprising a fluid source providing a conductive fluid and a flexible fluid connector secured to the housing, wherein the flexible fluid connector is configured to receive the fluid source and movably and fluidically couple the conductive fluid to the lumen defined by the main electrode to deliver the conductive fluid to the target area.

[0150] 19. A method comprising:

[0151] moving a distal end of a sheath containing a primary electrode and an auxiliary electrode adjacent to a target area;

[0152] sliding a primary actuator operably coupled to the primary electrode and an auxiliary actuator operably coupled to and movably engaged with the auxiliary electrode to a first position to actuate distal ends of the primary and auxiliary electrodes relative to the target area; and

[0153] The auxiliary actuator is rotated relative to the primary actuator to cause the auxiliary actuator to travel along a helical path to a second position independently of the primary actuator, thereby actuating the distal end of the auxiliary electrode to move relative to the target area independently of the primary electrode.

[0154] 20. The method according to claim 19, further comprising:

[0155] preventing the auxiliary actuator from rotating relative to the primary actuator until the primary actuator moves to the first position; and

[0156] The primary actuator is prevented from sliding after the auxiliary actuator is rotated to move the auxiliary actuator to the second position.

[0157] 21. A device, comprising:

[0158] an elongated instrument movable along an axis;

[0159] a rotatable actuator operably coupled to the proximal end of the instrument to actuate movement of the instrument along the axis in response to rotation of the rotatable actuator; and

[0160] A guide member operably connected to the rotatable actuator, wherein the guide member defines a generally helical channel about the axis to guide movement of the rotatable actuator, and wherein the pitch of the helical channel is varied to reduce the distance traveled by the actuator along the axis per unit rotation of the actuator.

[0161] 22. The apparatus of claim 21 wherein the pitch is varied to reduce the distance the actuator travels along the axis per unit rotation of the actuator at a location where the instrument is expected to apply increased resistance to movement of the actuator along the axis.

[0162] 23. The apparatus of claim 22, wherein the position at which the instrument is expected to apply increased resistance corresponds to a position at which movement of the distal end of the instrument is expected to be impeded by an obstacle.

[0163] 24. The apparatus of claim 22, wherein the position at which the instrument is expected to exert increased resistance corresponds to a position at which the configuration of the distal portion of the instrument resists movement of the instrument.

[0164] 25. An apparatus according to claim 24, wherein the configuration of the distal portion of the instrument that resists movement of the instrument includes the distal portion of the tool being formable into a coiled shape at the end of a lumen through which the instrument extends, so that at least one of coiling into the coiled shape when extending from the lumen and unfolding from the coiled shape when retracting into the lumen results in increased resistance to movement of the instrument along the axis.

[0165] 26. The apparatus of claim 22, wherein the pitch of the helical channel is varied to increase movement of the actuator along the axis at a second position, wherein the instrument is expected to apply reduced resistance to movement of the actuator along the axis.

[0166] 27. The apparatus of claim 21, wherein the guide comprises an annular tube defining the helical passage.

[0167] 28. Apparatus according to claim 27, wherein the rotatable actuator is receivable within the annular tube.

[0168] 29. The apparatus of claim 28, wherein the annular tube comprises two engageable portions configured to be disposed about the rotatable actuator, wherein opposing distal edges of the two engageable portions comprise edges of the helical channel.

[0169] 30. A system, comprising:

[0170] an elongated main electrode defining a lumen therein;

[0171] an elongated auxiliary electrode slidably receivable within the lumen;

[0172] a sheath configured to slidably receive the primary electrode therein, the sheath further configured to convey the primary electrode and the auxiliary electrode toward a target area;

[0173] a housing operably coupled to the sheath and movably mounted to slidably actuate the sheath relative to the target area;

[0174] a main actuator operably coupled to the main electrode and slidably coupled to the housing to actuate the main electrode to slide relative to the sheath along an axis and including a guide member defining a generally helical track, wherein a pitch of the helical track is varied to reduce movement of the guide member relative to the axis per unit rotation of the guide member about the helical track;

[0175] An auxiliary actuator is operably connected to the auxiliary electrode and rotatably received in the guide member of the main actuator, wherein the auxiliary actuator supports the guide member configured to engage the spiral channel, and wherein the auxiliary actuator is rotatable relative to the main actuator to actuate the auxiliary electrode to move relative to the main electrode.

[0176] 31. A system according to claim 30, wherein the pitch is varied to reduce the distance the auxiliary actuator travels along the axis per unit rotation of the auxiliary actuator at a position where the second electrode is expected to apply increased resistance to the auxiliary actuator moving along the axis.

[0177] 32. The system of claim 31 , wherein the position at which the auxiliary electrode is expected to apply increased resistance corresponds to the position at which movement of the distal tip is expected to be impeded by an obstacle.

[0178] 33. The system of claim 31 , wherein the position at which the auxiliary electrode is expected to exert increased resistance corresponds to a position at which the configuration of the distal portion of the auxiliary electrode resists movement of the auxiliary electrode.

[0179] 34. A system according to claim 33, wherein the configuration of the distal portion of the auxiliary electrode that resists movement of the auxiliary electrode includes the distal portion of the auxiliary electrode forming a coiled shape at the end of the lumen, wherein at least one of coiling into the coiled shape when extending from the lumen and unfolding from the coiled shape when retracting into the lumen results in increased resistance to movement of the auxiliary electrode along the axis.

[0180] 35. The system of claim 31 , wherein the pitch of the helical channel is varied to increase movement of the auxiliary actuator along the axis at a second position, wherein the auxiliary electrode is expected to apply reduced resistance to movement of the auxiliary electrode along the axis.

[0181] 36. The system of claim 30, wherein the guide comprises an annular tube defining the helical passage.

[0182] 37. A method comprising:

[0183] coupling the elongated instrument at a proximal end thereof to an actuator movable along an axis; and

[0184] The instrument is actuated by rotatably moving the actuator through a generally helical path about the axis, the pitch of the helical path being varied to change the distance the actuator travels along the axis per unit rotation of the actuator.

[0185] 38. The method of claim 37 wherein the pitch is varied to reduce the distance the actuator travels along the axis per unit rotation of the actuator at a location where the instrument is expected to apply increased resistance to movement of the actuator along the axis.

[0186] 39. The method of claim 38, wherein the position at which the elongated instrument is expected to exert increased resistance corresponds to a position at which movement of the distal end of the instrument is expected to be impeded by an obstacle.

[0187] 40. The method of claim 38, wherein the position at which the elongated instrument is expected to exert increased resistance corresponds to a position at which the configuration of the distal portion of the instrument resists movement of the instrument.

[0188] 41. A device, comprising:

[0189] a locking body defining an opening including a first portion having a first width and a second portion having a second width less than the first width, the locking body being slidably mountable on one of a first device supporting a first link and a second device supporting a second link, one of the first link and the second link being configured to support a flange thereon, the flange having a flange width less than the first width and greater than the second width; and

[0190] A slidable mounting mechanism, the slidable mounting mechanism is configured to slidably fix the locking body on one of the first device and the second device, the slidable mounting mechanism is further configured to enable the locking body to slide between an open position and a closed position, in which the first part can be positioned so that the first connecting piece can be inserted into the second connecting piece to form a connection, and in the closed position, the edge of the locking body surrounding the second part abuts the flange, thereby preventing the connecting piece supporting the flange from being withdrawn from the connection.

[0191] 42. The apparatus of claim 41 further comprising a latch mechanism configured to engage the locking body positioned in the closed position such that the locking body is prevented from sliding without the latch mechanism being disengaged from the locking body.

[0192] 43. The apparatus of claim 42, further comprising a biasing mechanism configured to urge the latch mechanism into a locked position to prevent the locking body from sliding from the closed position.

[0193] 44. The apparatus of claim 42, wherein the latch mechanism comprises a locking pin at least partially insertable into the locking body positioned in the closed position.

[0194] 45. The apparatus of claim 42, wherein the latch mechanism is mounted on the slidable mounting mechanism.

[0195] 46. ​​The apparatus of claim 42, wherein the slidable mounting mechanism comprises a torque transfer mechanism including a linkage configured to transfer torque between the first device and the second device.

[0196] 47. The apparatus of claim 41, wherein the slidable mounting mechanism comprises:

[0197] a base portion coupled to one of the first device and the second device, wherein the base portion abuts a first face of the locking body; and

[0198] A retaining ring is configured to engage the second face of the locking body, wherein the retaining ring includes at least one retaining member configured to engage the base portion to slidably retain the locking body against the base portion.

[0199] 48. The apparatus of claim 41 further comprising a shield extending at a connection of the first coupling and the second coupling.

[0200] 49. The apparatus of claim 48, wherein the shroud is contoured to allow the locking body to slide between the open position and the closed position without interfering with the first means and the second means.

[0201] 50. A system, comprising:

[0202] an elongated main electrode defining a lumen therein;

[0203] an elongated auxiliary electrode slidably received within the lumen;

[0204] a sheath slidably receiving the primary electrode and configured to deliver the primary electrode and the auxiliary electrode toward a target area;

[0205] a housing operably coupled to the sheath and movably mounted to slidably actuate the sheath relative to the target area;

[0206] a primary actuator operably coupled to the primary electrode and movably coupled to the housing to actuate the primary electrode relative to the sheath;

[0207] an auxiliary actuator operably coupled to the auxiliary electrode and movably coupled to the main actuator, wherein the auxiliary actuator is independently movable relative to the main actuator to actuate movement of the auxiliary electrode relative to the main electrode;

[0208] a first coupling supported by the housing and configured to engage a second coupling supporting a flange having a flange width, wherein the second coupling extends from a device through which the sheath and the electrode are to be delivered to the target area;

[0209] a locking body defining an opening including a first portion having a first width greater than the flange width and a second portion having a second width less than the flange width; and

[0210] A slidable mounting mechanism, the slidable mounting mechanism is configured to slidably fix the locking body to the housing, the slidable mounting mechanism is further configured to enable the locking body to slide between an open position and a closed position, in which the first part can be positioned so that the first connecting piece can insertably receive the second connecting piece to form a connection, and in the closed position, the edge of the locking body surrounding the second part abuts the flange, thereby preventing the connecting piece supporting the flange from being withdrawn from the connection.

[0211] 51. The system of claim 50, further comprising a latch mechanism configured to engage the locking body positioned in the closed position such that the locking body is prevented from sliding without the latch mechanism being disengaged from the locking body.

[0212] 52. The system of claim 51 further comprising a biasing mechanism configured to urge the latch mechanism into a locked position to prevent the locking body from sliding from the closed position.

[0213] 53. The system of claim 52, wherein the latch mechanism includes a locking pin at least partially insertable into the locking body positioned in the closed position.

[0214] 54. The system of claim 51 , wherein the latch mechanism is mounted on the slidable mounting mechanism.

[0215] 55. The system of claim 51, wherein the slidable mounting mechanism comprises a torque transmitting mechanism including a linkage configured to transmit torque between the first device and the second device.

[0216] 56. The system of claim 50, wherein the slidable mounting mechanism comprises:

[0217] a base portion coupled to one of the first device and the second device, wherein the base portion abuts a first face of the locking body; and

[0218] A retaining clamp is configured to engage the second face of the locking body, wherein the retaining clamp includes at least one retaining member configured to engage the base portion to slidably retain the locking body against the base portion.

[0219] 57. The system of claim 50 further comprising a shield extending at a connection of the first link and the second link.

[0220] 58. The system of claim 57, wherein the shroud is contoured to allow the locking body to slide between the open position and the closed position without interfering with the first device and the second device.

[0221] 59. A method comprising:

[0222] positioning a locking body in an open position, the locking body defining an opening including a first portion having a first width and a second portion having a second width less than the first width, the locking body being slidably mounted on one of a first device supporting a first link and a second device supporting a second link, the first portion being disposed between the first link and the second link when the locking body is positioned in the open position;

[0223] forming a connection by inserting the first coupling member into the second coupling member such that one of the first coupling member and the second coupling member supports a flange having a flange width that is less than the first width and greater than the second width; and

[0224] The locking body is repositioned into a closed position in which an edge of the locking body surrounding the second portion abuts the flange such that the coupling supporting the flange is prevented from being withdrawn from the connection.

[0225] 60. The method of claim 59, further comprising locking the locking body in place to prevent movement of the locking body after moving the locking body into the closed position.

[0226] It should be understood that the detailed description set forth above is merely illustrative in nature, and variations that do not depart from the gist and / or spirit of the subject matter protected by the claims are intended to be within the scope of the claims. Such variations should not be considered to depart from the spirit and scope of the subject matter protected by the claims.

Claims

1. A device, comprising: an elongated main electrode defining a lumen therein; an elongated auxiliary electrode slidably receivable within the lumen; a sheath configured to slidably receive the primary electrode therein, the sheath further configured to convey the primary electrode and the auxiliary electrode toward a target area; a housing operably coupled to the sheath and movably mounted to slidably actuate the sheath relative to the target area; a primary actuator operably coupled to the primary electrode and slidably coupled to the housing to actuate the primary electrode relative to the sheath; and an auxiliary actuator operably coupled to the auxiliary electrode and movably coupled to the main actuator to be able to slide with the main actuator to actuate the auxiliary electrode in coordination with the main electrode, the auxiliary actuator being able to rotate independently of the main actuator to travel along a helical path to actuate the auxiliary electrode to move relative to the target area independently of the main electrode; The main actuator includes guide portions coupled thereto, the guide portions being joined at their ends to form an annular tube and defining a spiral channel between their respective edges, the spiral channel receiving the outwardly extending guide member of the auxiliary actuator and forming a spiral path with a varying pitch.

2. The apparatus of claim 1 further comprising a primary actuator lock engageable by a user to selectively disengage the primary actuator from the housing to enable slidable movement of the primary actuator relative to the housing.

3. The apparatus of claim 2, wherein the primary actuator lock comprises a depressible release mechanism configured to allow the primary actuator to disengage from the housing when a control mechanism is depressed, and further configured to allow the primary actuator to engage the housing when the control is released.

4. The apparatus of claim 1, further comprising an actuator interlock configured to prevent movement of the auxiliary actuator until the primary actuator moves to a first position.

5. The apparatus of claim 4, wherein the actuator interlock is further configured to prevent movement of the primary actuator in response to movement of the auxiliary actuator to the second position.

6. The apparatus of claim 1 further comprising a device coupling configured to removably secure the housing to an electrosurgical device configured to deliver the sheath through a channel to a target area.

7. An apparatus according to claim 6, wherein the device connector is configured to slidably move across a connection between the housing and the electrosurgical device from an open position to a closed position, wherein the open position allows the connection between the housing and the electrosurgical device and the closed position prevents the housing from being removed from the electrosurgical device.

8. The apparatus according to claim 6 further includes a sheath actuator, which is configured to movably connect the housing to the device coupling so that the housing can be selectively moved relative to the device coupling and the electrosurgical device can move the distal end of the sheath relative to the target area.

9. The apparatus of claim 1 further comprising a flexible electrical connector secured to the housing, wherein the flexible electrical connector is configured to receive a two-pole power source and electrically and movably connect the first electrode to the first pole of the power source and electrically and movably connect the second electrode to the second pole of the power source.

10. The apparatus of claim 1, further comprising a flexible fluid coupling secured to the housing, wherein the flexible fluid coupling is configured to receive a fluid source providing a conductive fluid and to fluidically and movably couple the conductive fluid to the lumen defined by the main electrode to deliver the conductive fluid to the target area.

11. A system for treating tissue at a target area, the system comprising: an electrical power source configured to selectively provide electrical power between a first pole and a second pole via a two-pole cable; An electrode control device, the electrode control device comprising: an elongated main electrode defining a lumen therein; an elongated auxiliary electrode slidably receivable within the lumen; a sheath configured to slidably receive the primary electrode therein, the sheath further configured to convey the primary electrode and the auxiliary electrode toward a target area; a housing operably coupled to the sheath and movably mounted to slidably actuate the sheath relative to the target area; a primary actuator operably coupled to the primary electrode and slidably coupled to the housing to actuate the primary electrode relative to the sheath; and an auxiliary actuator operably coupled to the auxiliary electrode, and is movably coupled to the main actuator so as to be able to slide together with the main actuator, thereby actuating the auxiliary electrode in cooperation with the main electrode, The auxiliary actuator is rotatable independently of the primary actuator to travel along a helical path, thereby actuating the auxiliary electrode to move relative to the target area independently of the primary electrode; The main actuator includes guide portions coupled thereto, the guide portions being joined at their ends to form an annular tube and defining a spiral channel between their respective edges, the spiral channel receiving the outwardly extending guide member of the auxiliary actuator and forming a spiral path with a varying pitch.

12. The system of claim 11 further comprising a primary actuator lock engageable by a user to selectively disengage the primary actuator from the housing to enable slidable movement of the primary actuator relative to the housing.

13. The system of claim 12, further comprising an actuator interlock configured to prevent movement of the auxiliary actuator until the primary actuator moves to a first position.

14. The system of claim 13, wherein the actuator interlock is further configured to prevent movement of the primary actuator in response to movement of the auxiliary actuator to the second position.

15. The system of claim 11, further comprising a device coupling configured to removably secure the housing to an electrosurgical device configured to deliver the sheath through a channel to a target area.

16. A system according to claim 15, wherein the device connector is configured to slidably move across the connection between the housing and the electrosurgical device from an open position to a closed position, wherein the open position allows the connection between the housing and the electrosurgical device and the closed position prevents the housing from being removed from the electrosurgical device.

17. The system of claim 15, further comprising a sheath actuator movably configured to movably couple the housing to the device coupling so that the housing can be selectively moved relative to the device coupling and the electrosurgical device can move the distal end of the sheath relative to the target area.

18. The system of claim 11, further comprising a fluid source providing a conductive fluid and a flexible fluid connector secured to the housing, wherein the flexible fluid connector is configured to receive the fluid source and movably and fluidically couple the conductive fluid to the lumen defined by the main electrode to deliver the conductive fluid to the target area.

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