Electrosurgical devices, methods of use, and methods of manufacture

Abstract

In one example, an electrosurgical device includes a housing having a proximal end and a distal end, an electrosurgical electrode extending in a distal direction from the distal end of the housing, a plurality of light sources located in the housing, and an optical lens assembly including a plurality of optical components that (i) are coupled to one another at a distal end of the optical lens assembly and (ii) are separated from one another at a proximal end of the optical lens assembly. Each optical component includes a proximal reflective surface and a distal transmissive surface. Each proximal reflective surface extends distally from a respective light source and has an aspherical shape configured to substantially collimate light reflected by the proximal reflective surface. Each distal transmissive surface is configured to output light from the optical component in the distal direction.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefits of U.S. Provisional Application No. 63 / 076,089, filed September 9, 2020, and U.S. Provisional Application No. 63 / 211,876, filed June 17, 2021, the contents of which are hereby incorporated herein by reference. Technical Field

[0003] This disclosure relates generally to electrosurgical devices, and more specifically to electrosurgical devices and methods for illuminating surgical sites during electrosurgical procedures. Background Technology

[0004] Electrosurgery involves applying radiofrequency (RF) current (also known as electrosurgical energy) to biological tissue during an electrosurgical procedure to cut, coagulate, or alter the tissue. Specifically, an electrosurgical generator produces an electric current and supplies it to an active electrode, which applies the current (and thus electrical power) to the tissue. The current passes through the tissue and returns to the generator via a return electrode (also known as a “dispersive electrode”). As the current passes through the tissue, the tissue’s impedance (e.g., via the principle of resistance heating) converts a portion of the current into heat energy, which raises the temperature of the tissue and causes alterations to the tissue (e.g., cutting, coagulating, removing, and / or sealing the tissue). Summary of the Invention

[0005] In one example, an electrosurgical device is described. The electrosurgical device includes a housing having a proximal end and a distal end. The electrosurgical device also includes electrosurgical electrodes extending distally from the distal end of the housing and multiple light sources located within the housing. These multiple light sources can be configured to generate light.

[0006] Furthermore, the electrosurgical device may include an optical lens assembly having a proximal end and a distal end. The optical lens assembly may include multiple optical components that are (i) coupled to each other at the distal end of the optical lens assembly and (ii) separated from each other at the proximal end of the optical lens assembly. Each optical component is optically coupled to a corresponding light source among multiple light sources. Each optical component includes a proximal reflecting surface extending distally from the corresponding light source to which it is optically coupled and a distal transmitting surface located at the distal end of the optical lens assembly. The proximal reflecting surface is configured to reflect light emitted by the corresponding light source toward the distal end. The proximal reflecting surface may have an aspherical shape configured to substantially collimate the light reflected by the proximal reflecting surface. The distal transmitting surface is configured to output light from the optical component in a distal direction.

[0007] In another example, a procedure for operating an electrosurgical device is described. The procedure includes providing the electrosurgical device at block 2410. The electrosurgical device may include a housing having a proximal end and a distal end. The electrosurgical device may also include electrosurgical electrodes extending in a distal direction from the distal end of the housing and a plurality of light sources located within the housing. These plurality of light sources may be configured to generate light.

[0008] Furthermore, the electrosurgical device may include an optical lens assembly having a proximal end and a distal end. The optical lens assembly may include multiple optical components that are (i) coupled to each other at the distal end of the optical lens assembly and (ii) separated from each other at the proximal end of the optical lens assembly. Each optical component is optically coupled to a corresponding light source among a plurality of light sources. Each optical component includes a proximal reflecting surface extending distally from the corresponding light source to which it is optically coupled and a distal transmitting surface located at the distal end of the optical lens assembly. The proximal reflecting surface is configured to reflect light emitted by the corresponding light source toward the distal end. The proximal reflecting surface may have an aspherical shape configured to substantially collimate the light reflected by the proximal reflecting surface. The distal transmitting surface is configured to output light from the optical component in a distal direction.

[0009] The process also includes emitting light through multiple light sources. After emitting light, the process includes transmitting light through each optical component in such a way that: (i) the light is reflected toward the distal end in a substantially collimated manner by the near-side reflective surface of the optical component, and (ii) the light is output in a distal direction by the distal-side transmittance surface of the optical component.

[0010] The process also includes rotating the shaft relative to the housing to cause a corresponding rotation of the electrosurgical electrodes relative to the housing. The process also includes supplying electrosurgical energy from the shaft to the conductive surgical electrodes. Attached Figure Description

[0011] The appended claims set forth novel features of the illustrative example. However, the illustrative example, its preferred mode of use, other objects, and description will be best understood by referring to the following detailed description of the illustrative example of this disclosure when read in conjunction with the accompanying drawings, wherein:

[0012] Figure 1 A simplified block diagram of an example electrosurgical system is depicted.

[0013] Figure 2 A cross-sectional view of an electrosurgical device based on an example is depicted.

[0014] Figure 3 A simplified block diagram of an example electrosurgical system is depicted.

[0015] Figure 4A Described based on an example Figure 3 The embodiments of the optical lens assembly and light source are shown.

[0016] Figure 4B A cross-sectional view of the optical components of an optical lens assembly, as shown in Figure 4, is depicted according to an example.

[0017] Figure 5A Depicting according to another example Figure 3 The embodiments of the optical lens assembly and light source are shown.

[0018] Figure 5B A cross-sectional view of the optical components of an optical lens assembly, as shown in Figure 5, is depicted according to an example.

[0019] Figure 6 A simplified block diagram of a light source based on an example is depicted.

[0020] Figure 7A Depicting based on an example Figure 1 Electrosurgical devices and Figures 4A-4B A perspective view of an embodiment of an optical lens assembly, wherein the axis is in a first axial position relative to the housing.

[0021] Figure 7B Depicting based on an example Figure 7A A perspective view of an embodiment of an electrosurgical device, wherein the shaft is in a second axial position relative to the housing.

[0022] Figure 8 Depicting based on an example Figures 7A-7B A partially exploded view of the housing of the electrosurgical device shown.

[0023] Figure 9 Depicting based on an example Figures 7A-7B Cross-sectional view of the distal portion of the housing, the shaft, and the electrosurgical electrode of the exemplary embodiment shown.

[0024] Figure 10 A perspective view of an electrical contact based on an example is depicted.

[0025] Figure 11 The distal portion of an axis, based on an example, is depicted, with the top portion removed to show... Figures 7A-7B The optical component of the exemplary embodiment shown is positioned in the internal cavity of the shaft.

[0026] Figure 12 The description depicts an example of an electrosurgical electrode, aspiration cannula, and... Figures 4A-4B The components consist of optical lens assemblies and light sources.

[0027] Figure 13Depicting based on an example Figure 7A-12 An electrosurgical device in which components have been removed to show the conductors used to supply power to the light source.

[0028] Figure 14 Depicting according to another example Figure 1 Electrosurgical devices and Figures 5A-5B A perspective view of another embodiment of the optical lens assembly.

[0029] Figure 15 The image depicts a section taken through the longitudinal axis of the electrosurgical device, according to this example. Figure 14 A cross-sectional view of the electrosurgical device shown.

[0030] Figure 16 Depicting based on an example Figure 15 Enlarged view of the distal end of the shaft and the cross-section of the electrosurgical electrode shown.

[0031] Figure 17 Depicting based on an example Figure 14-16 A perspective view of the smoke exhaust channel and axis of the electrosurgical device shown.

[0032] Figure 18 Depicting based on an example Figure 14-16 Side view of the smoke exhaust channel and axis of the electrosurgical device shown.

[0033] Figure 19 Depicting based on an example Figure 14-16 The image shows a partially exploded view of the components consisting of a light source, optical lens, and heat sink in the smoke exhaust channel of the electrosurgical device.

[0034] Figure 20 Depicting based on an example by Figures 5A-5B The assembly consists of an optical lens assembly and an electrosurgical electrode.

[0035] Figure 21 Depicting based on an example Figure 3 A cross-sectional view of the optical components of the optical lens assembly shown.

[0036] Figure 22 Described based on an example Figures 4A-4B The optical output mode of the optical lens assembly shown.

[0037] Figure 23 Described based on an example Figures 5A-5B An exemplary optical output mode of the optical lens assembly shown.

[0038] Figure 24 A flowchart illustrating an exemplary procedure for operating an electrosurgical device, based on an example, is shown.

[0039] Figure 25 A flowchart illustrating an exemplary procedure for operating an electrosurgical device, which can at least be used with... Figure 24 Use the process shown.

[0040] Figure 26 A flowchart illustrating an exemplary procedure for operating an electrosurgical device, which can at least be used with... Figure 24 Use the process shown together.

[0041] Figure 27 A flowchart illustrating an exemplary procedure for operating an electrosurgical device, which can at least be used with... Figure 24 Use the process shown together.

[0042] Figure 28 A flowchart illustrating an exemplary procedure for operating an electrosurgical device, which can at least be used with... Figure 24 Use the process shown together.

[0043] Figure 29 A flowchart illustrating an exemplary procedure for operating an electrosurgical device, which can at least be used with... Figure 24 Use the process shown together.

[0044] Figure 30 A flowchart illustrating an exemplary procedure for operating an electrosurgical device, which can at least be used with... Figure 24 Use the process shown together.

[0045] Figure 31 It shows that the operation can be at least with Figure 24 A flowchart illustrating an exemplary procedure using an electrosurgical device in conjunction with the procedure shown.

[0046] Figure 32 A flowchart illustrating an exemplary procedure for operating an electrosurgical device, which can at least be used with... Figure 24 Use the process shown together.

[0047] Figure 33 A flowchart illustrating an exemplary procedure for operating an electrosurgical device, which can at least be used with... Figure 24 Use the process shown together.

[0048] Figure 34 A flowchart illustrating an exemplary procedure for operating an electrosurgical device, which can at least be used with... Figure 24 Use the process shown together. Detailed Implementation

[0049] The disclosed examples will now be described more fully below with reference to the accompanying drawings, which illustrate some, but not all, of the disclosed examples. In fact, several different examples may be described, and these different examples should not be construed as being limited to the examples described herein. Rather, the description of these examples makes this disclosure comprehensive and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0050] Referring to the quantities or measurements described herein, the terms “about” or “substantially” mean that the described characteristic, parameter, or value need not be obtained precisely, but may exist in quantity with respect to deviations or variations that do not preclude the effect that the characteristic is intended to provide. These deviations or variations include, for example, tolerances, measurement errors, measurement accuracy limitations, and other factors known to those skilled in the art.

[0051] As described above, an electrosurgical device can use electrical energy supplied by an electrosurgical generator to apply electrosurgical energy from electrosurgical electrodes to tissue. To help practitioners better visualize the surgical site while performing electrosurgical procedures, the electrosurgical device may include features for transmitting light in a distal direction to illuminate the surgical site. For example, the electrosurgical device may include one or more optical features that transmit light along and / or around the electrosurgical electrodes to illuminate the surgical site.

[0052] While providing optical features for transmitting light to an electrosurgical device may be beneficial, these features occupy space within or on the device. This can present several challenges. For example, limiting or reducing the size of the electrosurgical device to provide greater access to small surgical chambers and / or reduce obstruction of the electrosurgical electrodes and / or the surgical site's line of sight may be advantageous. These space constraints can be further exacerbated in embodiments of the electrosurgical device that include other space-consuming features, such as features for venting surgical fumes from the surgical site.

[0053] Another challenge is achieving high-quality light radiation within a relatively small available space. In practice, it may be desirable to provide light around the perimeter of the electrosurgical electrodes. Doing so can be beneficial while reducing shadows caused by the electrosurgical electrodes. Furthermore, reducing light loss along the light transmission path between the light source and the location from which the light is output from the electrosurgical device would be advantageous. For example, reducing light loss can help reduce the power requirements of operating the light source and / or reduce heat.

[0054] This application provides an optical lens assembly that can be incorporated into an electrosurgical device to address one or more of the aforementioned problems.

[0055] Now for reference Figure 1 The image shows an example of an electrosurgical system 100. Figure 1As shown, the electrosurgical system 100 includes an electrosurgical generator 110 and an electrosurgical device 112. Typically, the electrosurgical generator 110 generates electrosurgical energy suitable for performing electrosurgical procedures on a patient. For example, the electrosurgical generator 110 may include a power converter circuit 114 that converts mains power into electrosurgical energy, such as radio frequency (RF) output power. For example, the power converter circuit 114 may include one or more electrical components (e.g., one or more transformers) that can control the voltage, current, and / or frequency of the electrosurgical energy.

[0056] In the example, the electrosurgical generator 110 may include a user interface 116 that can receive one or more inputs from a user and / or provide one or more outputs to the user. As an example, the user interface 116 may include one or more buttons, one or more switches, one or more dials, one or more keyboards, one or more touchscreens, one or more displays, one or more indicator lights, one or more speakers, and / or one or more tactile output devices.

[0057] In one example, the user interface 116 may be operable to select an operating mode from a plurality of operating modes of the electrosurgical generator 110. As examples, these operating modes may include a cutting mode, a coagulation mode, a resection mode, and / or a sealing mode. Combinations of these waveforms may also be formed to create hybrid modes. In one implementation, these operating modes may correspond to corresponding waveforms of electrosurgical energy. Thus, in this implementation, the electrosurgical generator 110 may generate electrosurgical energy having a waveform selected from a plurality of waveforms based at least in part on the operating mode selected using the user interface 116.

[0058] The electrosurgical generator 110 may also include one or more sensors 118 that can sense one or more conditions related to the electrosurgical energy and / or the target tissue. As an example, the sensors 118 may include one or more current sensors, one or more voltage sensors, one or more temperature sensors, and / or one or more bioimpedance sensors. In this example, the electrosurgical generator 110 may additionally or alternatively generate electrosurgical energy having a certain amount of electrosurgical energy (e.g., electrical power) and / or an electrosurgical waveform selected from a variety of waveforms based on one or more parameters related to the conditions sensed by the sensors 118.

[0059] In one example, the electrosurgical energy may have a frequency of approximately 100 kHz to reduce (or avoid) stimulation of muscles and / or nerves near the target tissue. In another example, the electrosurgical energy may have a frequency between approximately 300 kHz and approximately 500 kHz.

[0060] exist Figure 1 The electrosurgical generator 110 also includes a connector 120 that facilitates connection of the electrosurgical generator 110 to the electrosurgical device 112. For example, the electrosurgical device 112 may include a power cord 122 with a plug that can be connected to the socket of the connector 120 of the electrosurgical generator 110. In this arrangement, the electrosurgical generator 110 can supply electrosurgical energy to the electrosurgical device 112 via the connection between the connector 120 of the electrosurgical generator 110 and the power cord 122 of the electrosurgical device 112.

[0061] like Figure 1 As shown, the electrosurgical device 112 may include a housing 123. The housing 123 may be an elongated structure in which components of the electrosurgical device 112 may be disposed. In some examples, the housing 123 may be a single, integral structure. In other examples, the housing 123 may include multiple structures connected to each other.

[0062] exist Figure 1 In this embodiment, housing 123 includes a handle 124 defining an internal bore, a shaft 126 extending distally from handle 124, and electrosurgical electrodes 128 coupled to shaft 126. Typically, handle 124 is configured to facilitate a user's gripping and manipulation of electrosurgical device 112 while performing electrosurgical procedures. For example, handle 124 may have a shape and / or size that facilitates a user's performance of electrosurgical procedures using single-handed manipulation of electrosurgical device 112. In one embodiment, handle 124 may have a shape and / or size that facilitates a user's gripping of electrosurgical device 112 in a writing instrument-like manner (e.g., electrosurgical device 112 may be an electrosurgical scalpel).

[0063] Furthermore, for example, the handle 124 and / or shaft 126 may be made of one or more materials that are electrically insulated (e.g., plastic materials). This can help to insulate the user from the electrosurgical energy flowing through the electrosurgical device 112 while performing electrosurgical procedures.

[0064] In some embodiments, shaft 126 may be fixedly and immovably coupled to handle 124. This simplifies manufacturing and reduces manufacturing costs by simplifying the electrical connection, for example (e.g., by omitting slip ring electrical contacts and / or sliding electrical contacts), where the electrical connection would otherwise require consideration of movement of shaft 126 and handle 124 relative to each other. In one example, handle 124 and shaft 126 may be formed as a single integral structure such that shaft 126 and handle 124 are fixed and immovable relative to each other. In another example, handle 124 and shaft 126 may be coupled to each other by a welded coupling, an adhesive coupling, and / or another coupling that prevents movement between handle 124 and shaft 126.

[0065] In other embodiments, the shaft 126 may be telescopically movable relative to the handle 124. For example, the shaft 126 may be telescopically movable within an internal bore 125 defined by the handle 124, such that the shaft 126 extends in a distal direction and retracts in a proximal direction relative to the handle 124 (e.g., movable along the longitudinal axis of the electrosurgical device 112). In some examples, an electrosurgical electrode 128 is coupled to the shaft 126, and thus, the electrosurgical electrode 128 may move with the shaft 126 in an axial direction along the longitudinal axis relative to the handle 124. This can be used to adjust the length of the electrosurgical device 112, which can facilitate the performance of electrosurgical procedures at multiple different depths within tissue (e.g., due to different patient anatomy and / or size) and / or at multiple different angles.

[0066] In some embodiments, the electrosurgical electrode 128 may additionally or alternatively rotate about a rotation axis parallel to the longitudinal axis of the electrosurgical device 112. In some examples, the electrosurgical electrode 128 may be rotatable relative to the handle 124 and the shaft 126. In other examples, the electrosurgical electrode 128 may be fixed non-rotatably relative to the shaft 126, such that the shaft 126 and the electrosurgical electrode 128 may rotate together with the handle 124 and at least one additional component within the internal cavity defined by the shaft 126. Rotating the electrosurgical electrode 128 relative to the handle 124 can facilitate adjusting the angle of the electrosurgical electrode 128 relative to one or more user input devices 130 of the electrosurgical device 112. In this arrangement, a user can comfortably grip the handle 124 in a position in which, while positioning the electrosurgical electrode 128 in a rotational position, their fingers can comfortably operate the user input device 130, the rotational position being selected from multiple rotational positions relative to the handle 124 based on, for example, the position, size, and / or shape of the surgical site in which the user is operating.

[0067] In one embodiment, the electrosurgical electrode 128 may be rotatable more than 360 degrees relative to the handle 124. This improves usability by allowing the operator unrestricted freedom to rotate the electrosurgical electrode 128. However, in other embodiments, the electrosurgical electrode 128 may be rotatable less than or equal to 360 degrees (e.g., 180 degrees or 360 degrees). This still allows the operator to achieve the desired rotational arrangement, but it is possible for the operator to rotate in a first direction to a stop that limits further rotation, and then rotate back in a second direction to achieve the desired rotational arrangement.

[0068] While it would be advantageous to provide rotation of the monopolar electrosurgical electrode 128 relative to the handle 124 and / or shaft 126, in some embodiments, the monopolar electrosurgical electrode 128 may be fixed in a non-rotatable manner relative to the handle 124 and shaft 126. This can, for example, help simplify manufacturing and reduce manufacturing costs by simplifying the electrical connection, such as by omitting slip ring and / or sliding contacts, which would otherwise require consideration of movement of the shaft 126 and handle 124 relative to each other.

[0069] User input device 130 can select between operating modes of electrosurgical device 112 and / or electrosurgical generator 110. For example, in one embodiment, user input device 130 may be configured to select between a cutting operation mode and a coagulation operation mode. In response to actuation of user input device 130 of electrosurgical device 112, electrosurgical device 112a may (i) receive electrosurgical energy having a power level and / or waveform corresponding to the operating mode selected via one or more user input devices 130, and (ii) supply electrosurgical energy to electrosurgical electrodes 128.

[0070] exist Figure 1 In this electrosurgical device 112, multiple electrical components are included that facilitate the supply of electrosurgical energy received from the electrosurgical generator 110 to the electrosurgical electrodes 128. For example, the electrosurgical device 112 may include at least one electrical component selected from a set of electrical components, including: a printed circuit board 132 (e.g., a flexible printed circuit board), a housing conductor 134, and / or a shaft conductor 136, which can provide circuitry for conducting electrosurgical energy from the power line 122 to the electrosurgical electrodes 128. One or more electrical components may be positioned within an internal bore 125 defined by the handle 124 and / or an internal chamber defined by the shaft 126.

[0071] In the example, the user input device 130 may include one or more buttons located on the outer surface of the handle 124. Each button of the user input device 130 is operable to actuate a corresponding one of a plurality of switches 138 on the printed circuit board 132. Typically, the switches 138 and / or the printed circuit board 132 are operable to control the supply of electrosurgical energy from the electrosurgical generator 110 to the electrosurgical electrode 128. For example, in one embodiment, when each button is operated (e.g., pressed), the corresponding switch 138 associated with the button may be actuated to cause the printed circuit board 132 to signal the electrosurgical generator 110 and cause the electrosurgical generator 110 to responsively supply electrosurgical energy having a power level and / or waveform corresponding to the operating mode associated with the button. In another embodiment, operating a button and thereby actuating the corresponding switch 138 associated with that button may close the switch 138 to complete the circuitry to the electrosurgical generator 110, thereby causing the electrosurgical generator 110 to responsively supply electrosurgical energy having a power level and / or waveform corresponding to the operating mode associated with the button. In some examples of this implementation, the printed circuit board 132 may be omitted.

[0072] In two exemplary embodiments, electrosurgical energy supplied by the electrosurgical generator 110 can be supplied from (i) the power line 122, the printed circuit board 132, and / or the switch 138 to the electrosurgical electrode 128 via the housing conductor 134 and the shaft conductor 136. Thus, as Figure 1 As shown, printed circuit board 132 can be connected to power line 122, housing conductor 134 can be connected to printed circuit board 132 and shaft conductor 136, and shaft conductor 136 can be connected to electrosurgical electrode 128. In this arrangement, housing conductor 134 can conduct electrosurgical energy (supplied to housing conductor 134 via printed circuit board 132) to shaft conductor 136, and shaft conductor 136 can conduct electrosurgical energy to electrosurgical electrode 128.

[0073] Typically, the housing conductor 134 and the shaft conductor 136 may each include one or more conductive elements that provide a conductive bus for supplying electrosurgical energy to the electrosurgical electrode 128. More specifically, the housing conductor 134 may include one or more conductive elements of the handle 124 that can supply electrosurgical energy to the shaft conductor 136, and the shaft conductor 136 may include one or more conductive elements of the shaft 126 that can supply electrical energy from the housing conductor 134 to the electrosurgical electrode 128. In embodiments where the shaft 126 is movable and / or rotatable relative to the handle 124, the housing conductor 134 may engage the shaft conductor 136 to maintain electrical coupling between the housing conductor 134, the shaft conductor 136, and the electrosurgical electrode 128 while (i) the shaft 126 and / or the electrosurgical electrode 128 are telescopically movable relative to the handle 124 and / or (ii) the electrosurgical electrode 128 is rotated relative to the handle 124.

[0074] although Figure 1 The electrosurgical device 112 includes a user input device 130, but in another example, the user input device 130 may be decoupled from the electrosurgical device 112. For example, the user input device 130 may additionally or alternatively include one or more foot pedals actuated to control the operation of the electrosurgical device 112 as described above. The foot pedals may be communicatively coupled to the electrosurgical generator 110 to provide signals in response to actuation of the foot pedals.

[0075] like Figure 1 As shown, the electrosurgical device 112 may also include one or more light sources 140 configured to emit light. The light sources 140 may be optically coupled to an optical lens assembly 142 configured to receive light emitted by the light sources 140 and transmit the light distally toward the surgical site to illuminate the surgical site while performing electrosurgical procedures using the electrosurgical electrodes 128. See below for further details. Figure 4A-23 As described in more detail, the optical lens 142 helps to guide the light emitted by the light source 140 in a distal direction, thereby improving the quality of the light illuminating the surgical site.

[0076] exist Figure 1In this configuration, the light source 140 may be coupled to the shaft 126. Thus, the light source 140 can also move telescopically relative to the handle 124 together with the shaft 126. However, in other examples, the light source 140 may be located within an internal bore of the handle 124 and / or coupled to an outer surface of the handle 124. As an example, the light source 140 may include one or more light-emitting diodes (LEDs), organic light-emitting diodes (OLEDs), optical fibers, non-fiber waveguides, and / or lenses. Furthermore, for example, the light source 140 may include a light-emitting diode printed circuit board (LED PCB) having one or more light sources (e.g., LEDs). As described in further detail below, the LED PCB may include PCB apertures, and one or more other components of the electrosurgical device 112 (e.g., electrosurgical electrodes 128) may extend through these apertures.

[0077] In embodiments including a light source 140, a user input device 130, a printed circuit board 132, a switch 138, a housing conductor 134, and / or a shaft conductor 136, power may additionally be supplied to the light source 140 from a direct current (DC) power supply 144. In one example, the DC power supply 144 may include a plug disposed on the handle 124, a power cord 122, and / or a battery positioned along the power cord 122 in a battery holder between the handle 124 and the plug. Although in Figure 1 In this embodiment, the electrosurgical device 112 includes a DC power supply 144, but in other examples, the DC power supply 144 may be separate from and different from the electrosurgical device 112. For example, in another example, the electrosurgical generator 110 may include the DC power supply 144.

[0078] Furthermore, in embodiments including the light source 140, the user input device 130 is operable to cause the light source 140 to emit light. In one example, the user input device 130 may include the light source 140, which is separate from the button controlling the electrosurgical operation mode of the electrosurgical device 112. In another example, the user input device 130 and the printed circuit board 132 may be configured such that operation of the button controlling the electrosurgical operation mode simultaneously controls the operation of the light source 140 (e.g., when the button is actuated to apply electrosurgical energy at the electrosurgical electrode 128, the light source 140 may be automatically actuated to emit light).

[0079] like Figure 1As shown, in response to operation of the user input device 130 to activate the light source 140, the DC power supply 144 can supply power (e.g., DC voltage) to the light source 140 via the printed circuit board 132, the housing conductor 134, and / or the shaft conductor 136. In this embodiment, one or more of the conductive elements of the housing conductor 134 may be configured to supply power from the DC power supply 144 to the light source 140 and / or return power from the light source 140 to the DC power supply 144. Thus, when the shaft 126 and the light source 140 move telescopically relative to the handle 124, the housing conductor 134 may additionally or alternatively facilitate electrical communication between the DC power supply 144 and the light source 140.

[0080] Although in the above example, the user input device 130 on the handle 124 can be operated to control the operation of the light source 140, the light source 140 may additionally or alternatively be operated by one or more user input devices on the electrosurgical generator 110 (e.g., via the user interface 116) and / or one or more user input devices on the plug of the power cord 122.

[0081] As described above, the electrosurgical device 112 may also include features for discharging surgical fumes from the target tissue to a location outside the surgical site. Surgical fumes are a byproduct of various surgical procedures. For example, during surgical procedures, surgical fumes may be generated as a byproduct of electrosurgical units (ESUs), lasers, electrocautery devices, ultrasound devices, and / or other powered surgical instruments (e.g., bone saws and / or drills). In some cases, surgical fumes may contain toxic gases and / or biological products resulting from tissue destruction. Furthermore, surgical fumes may contain unpleasant odors. For these and other reasons, many guidelines indicate that surgical personnel exposure to surgical fumes should be reduced or minimized.

[0082] To reduce (or minimize) exposure to surgical fumes, a fume extraction system can be used during surgery. Typically, this fume extraction system may include a suction pump 146 that generates sufficient suction and / or vacuum pressure to draw surgical fumes away from the surgical site. In some embodiments, the fume extraction system may be coupled to an exhaust system (e.g., an in-wall exhaust system) that removes surgical fumes from the operating room. In other embodiments, the fume extraction system may filter air containing surgical fumes and return the air to the operating room. In this example, the suction pump 146 and the electrosurgical generator 110 may be provided as separate devices or integrated into a single device (e.g., in a common housing).

[0083] like Figure 1As shown, shaft 126 may include a smoke vent 148 located within an internal chamber of shaft 126. The smoke vent 148 may also include smoke inlets that extend circumferentially around a central axis of a distal portion of the electrosurgical electrode 128. In this arrangement, the smoke inlets of the smoke vent 148 can help receive surgical smoke into the smoke vent 148 during all rotational alignment of the electrosurgical electrode 128 relative to the handle 124 and / or the electrosurgical device 112 relative to the target tissue. However, in another example, the smoke vent 148 may include one or more smoke inlets that do not extend circumferentially around the electrosurgical electrode 128.

[0084] In one example, the exhaust duct 148 may include an outer tube that is separated from the optical lens assembly 142 by an air gap. For example, shaft 126 may include a plurality of supports extending between the optical lens assembly 142 and the outer tube of the exhaust duct 148 to provide an air gap between the outer tube and the optical lens assembly 142. In one embodiment, the optical lens assembly 142 may include supports such that the optical lens assembly 142 and the supports are formed as a single integral structure. In another embodiment, the supports may be formed as a single integral structure together with the outer tube of the exhaust duct 148. In yet another embodiment, the supports may be separate from the outer tube of the exhaust duct 148 and the optical lens assembly 142.

[0085] In one example, the exhaust passage 148 of shaft 126 defines a first portion of the smoke flow path, and the internal bore of handle 124 defines a second portion of the smoke flow path. Figure 2 A partial cross-sectional view of an electrosurgical device 112 according to an embodiment of this example is shown. In this arrangement, surgical smoke can be received from the surgical site into a smoke exhaust channel 148 of the shaft 126, and flows proximally along the smoke exhaust channel into an internal bore 125 of the handle 124. In the internal bore 125 of the handle 124, the smoke can further flow into a smoke tube 150, which is coupled to the proximal end of the handle 124 and configured to deliver smoke from the handle 124 to a suction pump 146.

[0086] As described above, the optical lens assembly 142 helps guide the light emitted by the light source 140 in a distal direction, thereby improving the quality of light illuminating the surgical site. The optical lens assembly 142 may be located at the distal end of the axis 126. In some examples, the optical lens assembly 142 may be circumferentially arranged around the electrosurgical electrode 128 to emit light distally around all sides of the electrosurgical electrode 128. This helps reduce shading and provides greater uniformity of illumination throughout all rotational alignment of the axis 126 relative to the handle 124 and / or the electrosurgical device 112 relative to the target tissue.

[0087] In some embodiments, the exhaust channel 148 and the optical lens assembly 142 may be coaxial. For example, the exhaust channel 148 and the optical lens assembly 142 may each have a longitudinal axis aligned with the central axis of shaft 126. Arranging the exhaust channel 148 such that its central axis is aligned with the central axis of shaft 126 is beneficial for efficient suction performance. Similarly, positioning the electrosurgical electrode 128 aligned with the central axis of shaft 126 is beneficial to provide, for example, better visibility and / or more intuitive handling during all rotational alignments.

[0088] In the example, the optical lens assembly 142 may define a through-hole, and the smoke exhaust channel 48 and / or the electrosurgical electrode 128 may extend through the through-hole. In this arrangement, the electrosurgical electrode 128 may be centered on axis 126, the smoke exhaust channel 148 may extend around the perimeter of the electrosurgical electrode and receive smoke, and the optical lens assembly 142 may extend around the perimeter of the electrosurgical electrode 128 and emit light.

[0089] Figure 3 Depicting based on an example Figure 1 The diagram shows a simplified block diagram of an electrosurgical device 112, which includes an additional feature of an optical lens assembly 142. Figure 3 In this electrosurgical system 100, a housing 123, electrosurgical electrodes 128, a plurality of light sources 140 located in the housing 123, and an optical lens assembly 142 are included. The housing 123 has a proximal end and a distal end, and the electrosurgical electrodes 128 extend distally from the distal end of the housing 123.

[0090] In addition, Figure 3 In this embodiment, the optical lens assembly 142 has a proximal end and a distal end. The optical lens assembly 142 includes a plurality of optical elements 301, which are (i) coupled to each other at the distal end of the optical lens assembly 142 and (ii) separated from each other at the proximal end of the optical lens assembly 142. In this example, the plurality of optical elements 301 do not optically communicate with each other (e.g., less than about 10% of the light from one optical element 301 passes through an adjacent optical element 301). This helps to provide a relatively narrow beam. However, a portion of the light emitted by one optical element 301 may overlap with a portion of the light emitted by another optical element 301. This provides a wide beam compared to embodiments where the optical elements 301 are not in optical communication.

[0091] exist Figure 3 In this configuration, the optical lens assembly 142 may include two or more optical components 301. More specifically, the optical lens assembly 142 may include an number of optical components equal to N, where N is an integer value greater than 1. Figure 3As shown, each optical component 301 is optically coupled to a corresponding light source 140 among a plurality of light sources 140. Thus, the light sources 140 may also include a number equal to N. In one embodiment, the optical lens assembly 142 may include three or more optical components 301 and three or more light sources 140. This helps to distribute the optical components 301 around the longitudinal axis of axis 126, such that the optical lens assembly 142 can emit light around the electrosurgical electrode 128 in the distal direction to (i) reduce shadow formation and (ii) provide greater illumination uniformity in all rotational positions of the electrosurgical electrode 128 relative to the handle 124 and / or the electrosurgical device 112 relative to the target tissue.

[0092] As described in further detail below, at the proximal end of the optical lens assembly 142, each optical component 301 may define a chamber in which a corresponding light source 140 is positioned such that the light source 140 is located distal to the nearest surface of the optical lens assembly 142. This can help to better capture and transmit wide-angle light emitted by the light source 140 compared to other optical lenses where the light source is located near the nearest surface of the optical lens assembly. However, in some embodiments, the light source may be positioned proximal to the nearest surface of the optical lens assembly 142.

[0093] Each optical component 301 includes a proximal reflecting surface 303 and a distal transmitting surface 305. The proximal reflecting surface 303 extends distally from a corresponding light source 140 optically coupled to the optical component 301. The proximal reflecting surface 303 is configured to reflect light emitted by the corresponding light source 140 toward the distal end of the optical component 301. In some examples, the proximal reflecting surface 303 may be spherical or parabolic in shape, configured to substantially collimate the light reflected by the proximal reflecting surface 303.

[0094] In other examples, the proximal reflecting surface 303 has an aspherical shape configured to substantially collimate the light reflected by it. Compared to the possibility of using parabolic or spherical reflecting surfaces, the aspherical shape of the proximal reflecting surface 303 provides higher efficiency and achieves higher light collimation. In one example, the aspherical shape of the proximal reflecting surface 303 can be defined by the following Equation 1:

[0095] z(r)=C*r^2 / (1+sqrt(1–C^2*(K+1)*r^2)+a4*r^4+a6*r^6+a8*r^8(Equation 1)

[0096] Where C = curvature, K = conic constant, and a4, a6, and a8 are aspherical coefficients. Furthermore, in one embodiment, the proximal portion of the proximal reflecting surface 303 may have a parabolic shape, and the distal portion of the proximal reflecting surface 303 may have an aspherical shape. This can also help to collimate relatively wide-angle light rays.

[0097] In this example, the proximal reflective surface 303 may be a total internal reflection (TIR) ​​reflector. For example, the proximal reflective surface 303 and the housing 123 may be separated from each other, such that an air gap surrounds the proximal reflective surface 303. Arranging the proximal reflective surface 303 as a TIR reflector can help reduce the additional manufacturing costs and / or biocompatibility requirements associated with metal reflectors, which are typically incorporated into many conventional optical devices, such as flashlights.

[0098] The distal transmission surface 305 is located at the distal end of the optical lens assembly 142. The distal transmission surface 305 is configured to output light from the optical component 301 in a distal direction. Each distal transmission surface 305 of the optical lens assembly 142 may include one or more features for controlling the output of light from the optical lens assembly 142. In the example, the light emitted by the optical lens assembly 142 may have a substantially uniform light intensity at every point in space at a plane located distal to the distal end of the electrosurgical electrode 128. For example, the light emitted by the optical lens assembly 142 may define a light pattern at a plane located distal to the distal end of the electrosurgical electrode 128, and the light intensity at the weakest part of the light pattern may have an intensity at least 50% of the light intensity at the strongest part of the light pattern.

[0099] In some examples, each distal transmission surface 305 may be an aspherical lens configured to provide light in a substantially uniform manner. In one embodiment, each distal transmission surface 305 may be divided into multiple zones, and light rays from each zone may be traced to a target plane. The aspherical surface may be configured such that the distribution of light rays provides an approximately uniform degree of irradiance within a defined area of ​​the target plane. For example, an aspherical lens may be designed to determine a continuous aspherical surface by using Snell's law and the ray trajectory to determine the lens surface angle of each zone, and then fitting these angle curves to an aspherical concavity equation (e.g., Equation 1 above).

[0100] In another example, each distal transmission surface 305 may be a Fresnel lens. For example, a Fresnel lens may have a flat surface at its distal end. The flat surface at the distal end may define a plurality of concentric rings, each ring having corresponding optical properties (e.g., Fresnel grooves defined by pitch, depth, angle, and / or curvature), and the optical properties of the plurality of rings may differ from each other, such that the flat surface at the distal end transmits light in an approximately aspherical lens manner (e.g., the different rings may differ in at least one aspect of the pitch, depth, angle, and / or curvature of the Fresnel grooves). This can help improve the focused light at the distal transmission surface 305 while maintaining a relatively flat and compact shape.

[0101] In another example, the distal transmission surface 305 may include multiple microlenses at its distal end on a lens of one type selected from a group of lens types consisting of spherical lenses, aspherical lenses, and Fresnel lenses. Microlenses can further help improve the uniformity of light intensity. For example, microlenses may include multiple small spherical lenses arranged in a regular pattern. For example, the pattern may be hexagonal (e.g., each microlens has six sides) or rectangular (e.g., each microlens has four sides), with adjacent microlenses adjacent to each other. Each small spherical microlens produces an image of the source. Thus, the microlens array produces multiple images of the source. Because the microlenses include multiple lenses placed close together, the images will at least partially overlap, making it difficult for the human eye to distinguish individual images. As a result, the light beam appears uniform and homogeneous.

[0102] Figure 4A-5B Depicting according to the example Figure 3 Two implementations of the optical lens assembly 142. Specifically, Figure 4A and Figure 5A The first exemplary embodiment and the second exemplary embodiment respectively depict the components consisting of an optical lens assembly 142 and a light source 140, and Figure 4B and Figure 5B Describing respectively through Figure 4A and Figure 5A A cross-sectional view of an optical component 301 of the optical lens assembly 142 and a light source 140.

[0103] like Figure 4A-5BAs shown, the optical lens assembly 142 has a proximal end 142A and a distal end 142B. The optical lens assembly 142 also includes optical components 301, which (i) are coupled to each other at the distal end 142B of the optical lens assembly 142, and (ii) are separated from each other at the proximal end 142A of the optical lens assembly 142. In these examples, the optical components 301 do not communicate optically with each other. However, a portion of the light emitted by one of the optical components 301 may overlap with a portion of the light emitted by the other optical component 301 to distribute the light more uniformly on a plane located distal to the distal end of the electrosurgical electrode 128. In one example, the optical lens assembly 142 may be formed by a molding process.

[0104] exist Figure 4A-5B In this embodiment, the optical lens assembly 142 includes three optical components 301 and three light sources 140. As described above, this facilitates the distribution of the optical components 301 around the longitudinal axis 413 of axis 126, allowing the optical lens assembly 142 to emit light around the electrosurgical electrode 128 in a distal direction, thereby reducing shadow formation. Furthermore, for example, compared to other embodiments that include varying numbers of optical components 301 and light sources 140, the three optical components 301 and three light sources 140 can be arranged more compactly and require less power to provide the desired light quality. However, in other examples, the optical lens assembly 142 may include varying numbers of optical components 301 and light sources 140.

[0105] In the illustrated example, the light source 140 includes a plurality of LEDs coupled to an LED PCB 407. The LED PCB 407 may be in the form of a ring having a PCB aperture 409 that extends completely through the LED PCB 407. The optical lens assembly 142 may also include a lens aperture 411 that defines a through-hole through the optical lens assembly 142. The PCB aperture 409 of the LED PCB 407 may be aligned with the lens aperture 411 of the optical lens assembly 142 such that one or more other components of the electrosurgical device 112 (e.g., electrosurgical electrodes 128 and / or smoke extraction channels 148) may extend through the LED PCB 407 and the optical lens assembly 142, wherein the LEDs are positioned around the perimeter of the components.

[0106] For example, the light source 140 may be arranged circumferentially around the longitudinal axis 413 of the electrosurgical electrode 128, wherein the longitudinal axis 413 extends between the proximal end and the distal end of the electrosurgical electrode 128. Figure 4A-5BIn this configuration, three light sources 140 are equidistantly spaced around the longitudinal axis 413 of the electrosurgical electrode 128, and the lens aperture 411 defined by the optical lens assembly 142 has a central axis collinear with the longitudinal axis 413 of the electrosurgical electrode 128. This helps improve the uniformity of light around the electrosurgical electrode 128.

[0107] Furthermore, for example, a suction tube defining the smoke exhaust channel 148 may extend through PCB aperture 409 in LED PCB 407 and lens aperture 411 in optical lens assembly 142. In this arrangement, light source 140 may be positioned around the perimeter of the suction tube, and distal end 142B of optical lens assembly 142 may extend around the perimeter of the suction tube. This allows smoke to be exhausted and light to be emitted around the perimeter of electrosurgical electrode 128.

[0108] like Figure 4A and Figure 5A As shown, the optical lens assembly 142 includes an inner surface and an outer surface. The inner surface defines a lens aperture 411 and a through-hole in the optical lens assembly 142. In one example, between the near-side reflecting surface 303 and the far-side transmitting surface 305, the cross-section of the optical lens assembly 142 has a circular shape at the inner surface and a non-circular shape at the outer surface. This allows the optical lens assembly 142 to rotate relative to a component extending through the through-hole of the optical lens assembly 142, while preventing rotation of the optical lens assembly 142 relative to a component adjacent to the outer surface. As an example, the non-circular shape can be elliptical, polygonal, and / or non-polygonal.

[0109] In another example, the inner surface may have a non-circular cross-sectional shape, while the outer surface has a circular shape, to allow rotation of peripherally positioned components and prevent rotation of internally positioned components relative to the optical lens assembly 142. In another example, both the inner and outer surfaces may have circular cross-sectional shapes to allow rotation of adjacent components, or both may have non-circular shapes to prevent rotation of adjacent components.

[0110] like Figure 4B and Figure 5B As shown, at the proximal end 142A of the optical lens assembly 142, each optical component 301 may define a cavity 415 in which a respective light source 140 is positioned such that the light source 140 is located distal to the nearest side surface of the optical lens assembly 142. Furthermore, each optical component 301 is separated from its corresponding light source 140 by an air gap. This facilitates better capture and transmission of wide-angle light emitted by the light source 140 compared to other optical lenses where the light source is located near the nearest side surface of the optical lens assembly 142.

[0111] like Figure 4A-5BAs shown, each optical component 301 includes a proximal reflective surface 303 and a distal transmissive surface 305. The proximal reflective surface 303 extends distally from the corresponding light source 140 optically coupled to the optical component 301. The proximal reflective surface 303 is configured to reflect light emitted by the corresponding light source 140 toward the distal end of the optical component 301.

[0112] In addition, Figure 4A-5B In this embodiment, the near-side reflecting surface 303 has an aspherical shape, which is configured to substantially collimate the light reflected by the near-side reflecting surface 303. Compared to using parabolic or spherical reflecting surfaces, the aspherical shape of the near-side reflecting surface 303 provides higher efficiency and achieves higher light collimation. Furthermore, in one embodiment, the near-side portion of the near-side reflecting surface 303 may have a parabolic shape, and the far-side portion of the near-side reflecting surface 303 may have an aspherical shape. This can also help to collimate relatively wide-angle light.

[0113] As described above, the proximal reflective surface 303 can be an all-in-the-interior TIR reflector. For example, the proximal reflective surface 303 and the housing 123 can be separated from each other, such that an air gap surrounds the proximal reflective surface 303. Arranging the proximal reflective surface 303 as a TIR reflector can help reduce the additional manufacturing costs and / or biocompatibility requirements associated with metal reflectors.

[0114] The distal transmission surface 305 is located at the distal end 142B of the optical lens assembly 142. The distal transmission surface 305 is configured to output light from the optical component 301 in the distal direction. As described above, each distal transmission surface 305 of the optical lens assembly 142 may include one or more features for controlling the output of light from the optical lens assembly 142. For example, Figures 4A-4B Each distal transmission surface 305 in the image is a Fresnel lens, and Figures 5A-5B Each of the distal transmission surfaces 305 is an aspherical surface.

[0115] Figure 6 A simplified block diagram of a light source 140 based on an example is depicted. Figure 4B , Figure 5B and Figure 6 In this configuration, each light source 140 is an LED 617, which includes a die 619 and a protective layer 621. The protective layer 621 may be an optically transparent material layer, such as a silicone material layer. The protective layer 621 may be a non-rigid structure (e.g., a coating), which contrasts with the rigid silicon lenses that protect the underlying diode structure in conventional LEDs. This is possible, at least in part, because the light source 140 is positioned within the cavity 415 of the optical component 301, allowing the optical component 301 to protect the die 619.

[0116] By using a non-rigid protective layer 621 instead of a rigid silicon lens, the overall size of each LED 617 can be reduced. This helps to reduce the size of the optical lens assembly 142 while maintaining the ratio of optical diameter to LED diameter. For example, in conventional LEDs, a rigid silicon lens is typically about 200% larger than the diameter of the die 619. In contrast, an LED with the aforementioned non-rigid protective layer 621 can have a diameter that is about 10% to about 50% smaller than the diameter of the die 619. As an example, each LED 617 can have a diameter of about 1 millimeter (mm) to about 2 millimeters. Therefore, the aforementioned light source 140 helps to solve space constraint problems and improves light capture from a light source with a wide Lambertian optical pattern.

[0117] Figure 7A-13 Depicting based on an example Figure 1 The illustrated embodiment of the electrosurgical device 112 includes... Figures 4A-4B The optical lens assembly 142 is shown. (As shown) Figures 7A-7B As shown, the housing 123 of the electrosurgical device 112 includes a handle 124 having a proximal end and a distal end, and a shaft 126 extending from the distal end of the handle 124. Electrosurgical electrodes 128 extend from the distal end of the shaft 126, and a plurality of light sources 140 are located in the shaft 126. The handle 124 defines an internal bore 125, and the shaft 126 extends distally from the internal bore 125 of the handle 124. Furthermore, in Figures 7A-7B In this embodiment, the distal portion 128A of the electrosurgical electrode 128 extends distally from the shaft 126. In this example, the distal portion 128A of the electrosurgical electrode 128 may define a working end configured to apply electrosurgical energy to tissue.

[0118] exist Figures 7A-7B In this configuration, shaft 126 can telescopically move within the internal bore 125 of handle 124 to adjust the distance of the distal end of electrosurgical electrode 128 relative to handle 124. For example, Figure 7A The image shows shaft 126 in a first position relative to handle 124 along the longitudinal axis of electrosurgical device 112, and... Figure 7B The image shows shaft 126 in a second position relative to handle 124 along the longitudinal axis of electrosurgical device 112. Figures 7A-7B In this configuration, the first position is located proximal to the second position, such that the shaft 126 is in a retracted position within the handle 124 in the first position, and in an extended position extending beyond the handle 124 in the second position. As described above, telescopically moving the shaft 126 relative to the handle 124 can facilitate adjusting the length of the electrosurgical device to treat target tissues that are sized and / or shaped in different ways. However, as described above, in other examples, the shaft 126 may be fixedly coupled to the handle 124 such that the shaft 126 cannot move relative to the handle 124.

[0119] In some examples, the electrosurgical device 112 may include a collar 762 located proximally at the handle 124. The collar 762 may be rotatable relative to the handle 124 to increase and / or reduce friction between the outer surface of the shaft 126 and the inner surface of the collar 762. In this way, the collar 762 allows and / or prevents axial telescopic movement of the shaft 126 relative to the handle 124.

[0120] In addition, Figures 7A-7B In this arrangement, shaft 126 is fixed non-rotatably relative to handle 124, and electrosurgical electrode 128 is rotatable relative to handle 124 and shaft 126. This simplifies the design of the electrosurgical device 112 and reduces its manufacturing cost. For example, this arrangement of handle 124, shaft 126, and electrosurgical electrode 128 simplifies the electrical connections between housing conductor 134, shaft conductor 1236, and electrosurgical electrode 128. Furthermore, this arrangement helps reduce the risk of damage to these electrical connections during telescopic movement of shaft 126 relative to handle 124 and / or during rotation of electrosurgical electrode 128 relative to shaft 126 and handle 124.

[0121] Figure 8-13 Additional aspects of the electrosurgical device 112 are described, which may facilitate the aforementioned telescopic and rotational movements. Figure 8 An exploded view of the handle 124 is depicted. (As shown...) Figure 8 As shown, the handle 124 may include a top 864A, which may be coupled to a bottom 864B to define an internal bore 125 between the top 864A and the bottom 864B. Typically, the internal bore 125 may be a space within the handle 124 in which one or more components of the electrosurgical device 112 may be housed.

[0122] Within the internal bore 125 of the handle 124, the electrosurgical device 112 includes a shaft guide 866 extending along a direction parallel to the longitudinal axis of the handle 124 (e.g., extending between the proximal end 124A and the distal end 124B of the handle 124). The shaft guide 866 is configured to extend within the internal chamber 868 of the shaft 126. The internal chamber 868 of the shaft 126 may be a bore extending between the proximal end 126A and the distal end 126B of the shaft 126 (e.g., a bore extending between the proximal end 126A and the distal end 126B of the shaft 126). Figures 7A-7B (As shown). Thus, the internal chamber 868 can be defined by the inner surface of the shaft 126.

[0123] like Figure 8As shown, the shaft guide 866 may have a non-circular cross-sectional shape to help prevent rotation between the shaft 126 and the handle 124. For example, the outer surface of the shaft guide 866 extending in the inner cavity 868 of the shaft 126 may have a non-circular shape that engages with the non-circular shape of the inner surface of the shaft 126 within the inner cavity 868. In this arrangement, the shaft 126 may slide on the shaft guide 866 in both proximal and distal directions (e.g., along the longitudinal axis of the handle 124), but rotation of the shaft 126 relative to the shaft guide 866 is prevented due to (i) the engagement between the inner surface of the inner cavity 868 of the shaft 126 and (ii) the outer surface of the shaft guide 866.

[0124] In addition, such as Figure 8 As shown, the shaft guide 866 is fixed in a non-rotatable manner relative to the handle 124. For example, a portion of the shaft guide 866 may have a non-circular shape, which can engage a structure with a corresponding shape in the handle 124. For example, in Figure 8 In this arrangement, the proximal portion of the shaft guide 866 has a hexagonal feature that engages with a hexagonal socket formed in the inner wall of the handle 124 (e.g., the inner wall of the top 864A and / or bottom 864B of the handle 124) to prevent rotation between the shaft guide 866 and the handle 124. In this arrangement, the shaft 126 is fixed in a non-rotatable manner relative to the handle 124 due to a first non-rotatable engagement between the shaft 126 and the shaft guide 866, and a second non-rotatable engagement between the shaft guide 866 and the handle 124.

[0125] As described above, the electrosurgical electrode 128 is coupled to the shaft 126, and the electrosurgical electrode 128 is rotatable relative to the handle 124 and the shaft 126. Figure 9-10 An exemplary arrangement is shown for connecting the electrosurgical electrode 128 to the shaft 126 in a manner that allows the electrosurgical electrode 128 to rotate. Figure 9 Depicting Figures 7A-7B Cross-sectional view of the distal portion of the handle 124, the shaft 126, and the electrosurgical electrode 128 of the exemplary embodiment shown. Figure 9 An electrical contact 970 is also depicted, based on an example of a housing conductor 134 and a shaft conductor 136. Figure 10 Depicting Figure 9 A perspective view of the electrical contact 970 shown.

[0126] like Figure 9As shown, shaft 126 may include an electrical contact 970 coupled to a proximal portion 128B of electrosurgical electrode 128. Specifically, the electrical contact 970 is coupled to the proximal portion 128B of electrosurgical electrode 128 such that electrosurgical electrode 128B is rotatable relative to the electrical contact 970. In this example, electrosurgical electrode 128 and electrical contact 970 are electrically coupled in all rotational positions of electrosurgical electrode 128 relative to electrical contact 970.

[0127] In one example, the electrical contact 970 may frictionally engage the proximal portion 128B of the electrosurgical electrode 128, such that (i) when a force less than a threshold force is applied to the electrosurgical electrode 128B, the electrical contact 970 prevents rotation of the electrosurgical electrode 128 relative to the electrical contact 970, and (ii) when a force greater than the threshold force is applied to the electrosurgical electrode 128, the electrical contact 970 allows rotation of the electrosurgical electrode 128 relative to the electrical contact 970. The threshold force may be a force large enough to prevent the electrosurgical electrode 128 from rotating freely under gravity alone, and / or to prevent rotation of the electrosurgical electrode 128 when used for cutting and / or coagulating tissue. The threshold force may additionally or alternatively be a force low enough to allow the user to manually rotate the electrosurgical electrode 128 relative to the handle 124 without the use of separate tools or instruments.

[0128] To facilitate frictional engagement between the proximal portion 128B of the electrosurgical electrode 128 and the electrical contact 970, the electrical contact 970 may extend around at least half of the perimeter of the proximal portion 128B of the electrosurgical electrode 128. For example, in Figure 10 In this arrangement, the electrical contact 970 includes a pair of arms 971 that extend around more than half of the periphery of the proximal portion 128B of the electrosurgical electrode 128 and are biased inward to apply force to the proximal portion 128B of the electrosurgical electrode 128. The force applied by the electrical contact 970 can thereby help control the rotation of the electrosurgical electrode 128 relative to the shaft 126 and the handle 124. Furthermore, in this arrangement, the arms 971 of the electrical contact 970 can allow the electrosurgical electrode 128 to rotate more than 360 degrees about an axis of rotation (e.g., the central axis of the electrosurgical electrode).

[0129] The electrical contact 970 can also help hold the electrosurgical electrode 128 axially within the internal cavity 868 of the shaft 126. For example, the proximal portion 128B of the electrosurgical electrode 128 may include a first shoulder 972A that can engage the electrical contact 970 to prevent or stop axial movement of the electrosurgical electrode 128 relative to the shaft 126 in the distal direction. Furthermore, for example, the proximal portion 128B of the electrosurgical electrode 128 may include a second shoulder 972B that can engage a stop 973 of the shaft 126 to prevent axial movement of the electrosurgical electrode 128 relative to the shaft 126 in the proximal direction.

[0130] In some examples, the engagement between the first shoulder 972A and the electrical contact 970 can prevent or prevent the electrosurgical electrode 128 from being removed from the shaft 126, such that the electrosurgical electrode 128 is fixedly coupled to the shaft 126. In alternative examples, the engagement between the first shoulder 972A and the electrical contact 970 can allow the electrosurgical electrode 128 to be removed and replaced by another electrosurgical electrode 128.

[0131] In addition, such as Figure 9-10 As shown, the electrical contact 970 may include a first end 970A connected to a proximal portion 128B of the electrosurgical electrode 128 and a second end 970B extending into the handle 124. Figure 9 As shown, the second end 970B engages the housing conductor 134, which extends along the handle 124 in a direction parallel to the longitudinal axis of the handle 124. In this example, the second end 970B of the electrical contact 970 is configured to remain engaged with the housing conductor 134 while the shaft 126 moves telescopically relative to the handle 124. For example, the electrical contact 970 is fixedly coupled to the shaft 126 such that the electrical contact 970 moves together with the shaft 126 relative to the handle 124. In this arrangement, the second end 970B of the electrical contact 970 can continuously engage and electrically couple to the housing conductor 134 while sliding along the housing conductor 134 in response to axial movement of the shaft 126 relative to the handle 124. In this way, the electrical contact 970 can facilitate the supply of electrosurgical energy to the electrosurgical electrode 128 in any rotational and / or axial position relative to the handle 124.

[0132] like Figure 9 As shown, shaft 126 may also include a smoke exhaust passage 148 extending from the proximal end 126A of shaft 126 to the distal end 126B of shaft 126. For example, in Figure 7A , Figure 7B and Figure 9In this arrangement, the electrosurgical electrode 128 extends through the internal cavity 868 of the shaft 126, such that the smoke extraction channel 148 may include a gap defined between the electrosurgical electrode 128 and the inner surface of the shaft 126. In the illustrated example, the shaft 126 has a central axis extending between a proximal end 126A and a distal end 126B, and the electrosurgical electrode 128 has a central axis collinear with the central axis of the shaft 126. In this arrangement, the smoke extraction channel 148 can have substantially constant dimensions around the perimeter of the electrosurgical electrode 128. This can help provide relatively consistent suction at every point around the electrosurgical electrode 128. However, in other examples, the central axis of the electrosurgical electrode 128 and the central axis of the shaft 126 may be offset relative to each other and parallel to each other.

[0133] refer to Figure 8 The internal chamber 868 can provide a smoke exhaust passage 148 at the proximal end 126A of the shaft 126 (e.g., Figure 9 (As shown). The proximal end of the smoke exhaust passage 148 may be in fluid communication with the smoke exhaust chamber 152 of the handle 124. For example, in Figure 8 In the process, the smoke chamber 152 may include a portion of the bore 874 in the shaft guide 866 and the inner bore 125 of the handle 124 located on the proximal side of the shaft guide 866.

[0134] Refer again Figure 9 The electrosurgical device 112 may also include a suction cannula 975, which can be fluidly connected to a smoke vent 148 in the shaft 126. For example... Figure 9 As shown, the distal portion of the aspiration cannula 975 can extend distally from the distal end 126B of the shaft 126, and the electrosurgical electrode 128 can extend through the aspiration cannula 975. Specifically, the aspiration cannula 975 can be spaced apart from the electrosurgical electrode 128 to define a smoke inlet, which can extend circumferentially around the central axis of the distal portion 128A of the electrosurgical electrode 128.

[0135] In one example, the aspiration cannula 975 can be fixed non-rotatably relative to the electrosurgical electrode 128, such that rotation of the aspiration cannula 975 relative to the shaft 126 causes a corresponding rotation of the electrosurgical electrode 128 relative to the shaft 126 and the handle 124. In this arrangement, the user can use the aspiration cannula 975 to rotate the electrosurgical electrode 128 relative to the handle 124. This can advantageously allow the user to avoid direct contact with the electrosurgical electrode 128, as the electrosurgical electrode 128 may be at a relatively elevated temperature after or during use. Furthermore, since direct contact with the electrosurgical electrode 128 can negatively affect the coating on the electrosurgical electrode 128, the aspiration cannula 975 helps maintain the structural integrity and operational performance of the electrosurgical electrode 128.

[0136] exist Figure 9 In one embodiment, the aspiration cannula 975 includes one or more teeth 976, and the electrosurgical electrode 128 includes one or more slots 977. Each of the one or more teeth 976 of the aspiration cannula 975 is positioned in a corresponding slot of the one or more slots 977, such that the one or more teeth 976 engage the one or more slots 977 to cause the electrosurgical electrode 128 to rotate in response to rotation of the aspiration cannula 975. However, in another example, the aspiration cannula 975 may include one or more slots 977, and the electrosurgical electrode 128 may include one or more teeth 976.

[0137] In some examples, the aspiration cannula 975 may be telescopically movable within the internal chamber 868 of the shaft 126 to adjust the distance between the aspiration cannula 975 and the distal end of the electrosurgical electrode 128. For example, each of one or more teeth 976 may be configured to slide longitudinally in a corresponding slot of one or more slots 977 in response to telescopic movement of the aspiration cannula 975 relative to the shaft 126 and / or the electrosurgical electrode 128. In this telescopic arrangement, the aspiration cannula 975 may be moved relative to the shaft 126 and the electrosurgical electrode 128 to adjust the exposure of the distal portion 128A of the electrosurgical electrode 128A. Specifically, the suction cannula 975 can be (i) moved toward the distal end 126B of the axis 126 to expose a greater extent of the electrosurgical electrode 128 and improve visibility at the surgical site, and (ii) moved away from the distal end 126B of the axis 126 to expose a smaller extent of the electrosurgical electrode 128 and capture a relatively larger amount of smoke at the surgical site.

[0138] While it would be advantageous for the aspiration cannula 975 to move telescopically relative to the shaft 126 and / or the electrosurgical electrode 128, in other examples, the aspiration cannula 975 may be axially fixed relative to the shaft 126 and / or the electrosurgical electrode 128. This simplifies manufacturing and reduces manufacturing costs.

[0139] In one example, the aspiration cannula 975 may be substantially transparent, allowing the electrosurgical electrode 128 to be seen through it. This helps improve the visibility of the electrosurgical electrode 128. However, in other examples, the aspiration cannula 975 may be made of an opaque material.

[0140] Figure 11 The distal portion of shaft 126 is depicted, with its top removed to show the optical components located in the internal chamber 868 of shaft 126. Figure 12 Depicting Figures 4A-4BThe optical lens assembly 142 shown has an electrosurgical electrode 128 and a suction sleeve 975, which define an extension of the smoke exhaust channel 148 through a portion of the lens aperture 411 of the optical lens assembly 142 and the PCB aperture 409 of the LED PCB 407.

[0141] like Figure 9 and Figure 11-12 As shown, the electrosurgical device 112 may include a light source 140 and a light source lens assembly 142 located in an internal chamber 868 of shaft 126. As described above, the light source 140 is configured to emit light into the optical lens assembly 142, and the optical lens assembly 142 is configured to transmit light from the light source 140 in a distal direction and emit light from the distal end 126B of shaft 126.

[0142] like Figure 12 As shown, the electrosurgical electrode 128 and the aspiration cannula 975 can extend through the PCB aperture 409 of the LED PCB 407 and the through-hole defined by the lens aperture 411 in the optical lens assembly 142. Furthermore, as... Figure 12 As shown, the light source 140 can be arranged around the electrosurgical electrode 128. In this arrangement, the electrosurgical device 112 can provide illumination and suction around the perimeter of the electrosurgical electrode 128. Furthermore, Figure 3-4B The integration of the optical lens assembly 142 in this arrangement improves illumination quality, reduces the size of the distal end of the electrosurgical device, and improves the field of vision at the surgical site.

[0143] like Figure 11 As shown, the electrosurgical device 112 may also include a heat sink 1180 attached to the proximal side of the light source 140. This helps to reduce the temperature of the light source 140 and thereby reduce the temperature of the electrosurgical device 112.

[0144] In one example, the light source 140, optical lens assembly 142, and / or heat sink 1180 may be fixedly coupled to the shaft 126. In this arrangement, the electrosurgical electrode 128 and aspiration cannula 975 may be rotatable relative to the light source 140, optical lens assembly 142, and / or heat sink 1180. For example, the apertures in the light source 140, optical lens assembly 142, and / or heat sink 1180 may have dimensions and / or shapes (e.g., circular) that allow the electrosurgical electrode 128 and aspiration cannula 975 to rotate within these apertures. Furthermore, in this arrangement, the light source 140, optical lens assembly 142, and heat sink 1180 may be telescopically movable relative to the handle 124 together with the shaft 126.

[0145] As described above, the housing conductor 134 and the shaft conductor 136 can electrically couple the light source 140 to the DC power supply 144. Figure 13 Depicting Figure 7A-12 The electrosurgical device 112, wherein components have been removed to illustrate, according to an example, the housing conductor 134 and the shaft conductor 136 for supplying direct current to the light source 140. Figure 13 As shown, shaft 126 may include a positive photoconductor 1336A and a negative photoconductor 1336B. While shaft 126 moves telescopically relative to handle 124 in the axial direction, positive photoconductor 1336A and negative photoconductor 1336B slidably engage corresponding electrical conductors 1334A and 1334B in handle 124.

[0146] like Figure 7A-8 and Figure 13 As shown, the user input device 130 includes a first button 730A and a second button 730B on the outer surface of the handle 124. In one embodiment, the first button 730A can be actuated to operate the electrosurgical device 112 in a cutting operation mode, and the second button 730B can be actuated to operate the electrosurgical device 112 in a coagulation operation mode. In this example, a third button (not shown) may be provided on the plug of the power cord 122 and / or the electrosurgical generator 110, and the third button may be actuated to operate the light source 140 (i.e., to make the light source 140 emit light or stop emitting light). As described above, in other examples, the user input device 130 may be configured in different ways. For example, in other examples, the electrosurgical device 112 may operate in a smaller number of operation modes, a larger number of operation modes, and / or different types of operation modes (e.g., the exemplary operation modes described above). Furthermore, for example, at least one user input device 130 may additionally or alternatively include a user interface 116 of the electrosurgical generator 110 and / or another external device (e.g., a foot switch) for operating the electrosurgical device 112 in one or more operation modes. In addition, for example, the user input device 130 on the handle 124 may include a third button for operating the light source 140.

[0147] Figure 14-20 Depicting according to another example Figure 1 Electrosurgical device 112 and Figures 5A-5B An embodiment of the optical lens assembly 142. Figure 14 A perspective view of the electrosurgical device 112 according to this example is depicted. Figure 15 A cross-sectional view of the electrosurgical device 112, taken through the longitudinal axis 1482 of the electrosurgical device according to this example, is depicted.

[0148] like Figure 14-15As shown, the electrosurgical device 112 includes a handle 124 defining an internal bore 125, a shaft 126 extending distally from the internal bore 125 of the handle 124, and a smoke vent 148 located in an internal chamber 1468 of the shaft 126. The shaft 126 has a longitudinal axis 1482 extending between a proximal end 126A and a distal end 126B of the shaft 126. Furthermore, an electrosurgical electrode 128 extends distally from the distal end 126B of the shaft 126.

[0149] In one example, shaft 126 may be telescopically movable within an internal bore 125 of handle 124 to adjust the distance of the distal end of electrosurgical electrode 128 relative to handle 124. As described above, telescopically movable shaft 126 relative to handle 124 can facilitate adjustment of the length of the electrosurgical device to treat target tissues that are sized and / or shaped in different ways. However, as described above, in other examples, shaft 126 may be fixedly coupled to handle 124 such that shaft 126 cannot move relative to handle 124.

[0150] In some examples, the electrosurgical device 112 may include a collar 1462 located proximal to the handle 124. The collar 1462 may be rotatable relative to the handle 124 to increase and / or reduce friction between the outer surface of the shaft 126 and the inner surface of the collar 1462. In this way, the collar 1462 allows and / or prevents axial telescopic movement of the shaft 126 relative to the handle 124.

[0151] In addition, Figure 14-15 In the middle, shaft 126 is rotatable relative to handle 124, and smoke exhaust channel 148 is fixed non-rotatably relative to handle 124. Furthermore, as described in further detail below, electrosurgical device 112 may further include light source 140 and... Figures 5A-5B The optical lens assembly 142, both of which can be fixed non-rotatably relative to the handle 124. Providing rotation of the electrosurgical electrode 128 together with the shaft 126 while fixing the smoke exhaust channel 148, the light source 140 and / or the optical lens assembly 142 non-rotatably can help simplify the design of the electrosurgical device 112 and / or reduce its manufacturing cost.

[0152] As a result of the distal extension of the electrosurgical electrode 128 from the distal end 126B of the shaft 126, the rotational arrangement of these components of the electrosurgical device 112 can be at least partially realized such that (i) the shaft 126 conducts electrosurgical energy to the electrosurgical electrode 128, and (ii) rotation of the shaft 126 relative to the handle 124 causes a corresponding rotation of the electrosurgical electrode 128 relative to the handle 124. For example, at least a portion of the shaft 126 may be formed of a conductive material such that the shaft 126 is a shaft conductor 136 (e.g., a conductive tube that at least partially defines the internal chamber 1468) for supplying electrosurgical energy to the electrosurgical electrode 128.

[0153] In one example, the electrosurgical electrode 128 and the shaft 126 are formed as a single, integral structure. This is advantageous in the following embodiments, where the electrosurgical electrode 128 is permanently fixed to the shaft 126 such that the electrosurgical electrode 128 cannot be replaced by another electrosurgical electrode 128. In another example, the electrosurgical electrode 128 and the shaft 126 may be separate components joined together (e.g., by welding, brazing, and / or friction fit). In some embodiments where the electrosurgical electrode 128 and the shaft 126 are separate components, the electrosurgical electrode 128 may be removable from the shaft 126 and replaceable by another electrosurgical electrode. In other embodiments, the electrosurgical electrode 128 may be permanently fixed to the shaft 126 such that the electrosurgical electrode 128 cannot be replaced by another electrosurgical electrode 128.

[0154] exist Figure 14-15 In the shaft 126, a conductive portion 126C and an insulating portion 126D are included. As described above, an electrosurgical electrode 128 may extend from the conductive portion 126C of the shaft 126. The insulating portion 126D of the shaft 126 may be a sleeve structure covering the interface between the electrosurgical electrode 128 and the conductive portion 126C of the shaft 126. In this arrangement, the insulating portion 126D may help reduce arcing and / or help supply electrosurgical energy to the electrosurgical electrode 128. Furthermore, the shaft 126 may include an insulating material (e.g., a heat-shrinkable material) layer 126E covering the remaining portion of the conductive portion 126C of the shaft 126 (e.g., the portion not covered by the insulating portion 126D of the shaft 126) to reduce arcing and / or help supply electrosurgical energy to the electrosurgical electrode 128.

[0155] Now for reference Figure 16 An enlarged view of a cross-section of the distal end 126B of the shaft 126 and the electrosurgical electrode 128, taken through the longitudinal axis 1482 according to an example, is shown. Figure 16As shown, the distal portion 128A of the electrosurgical electrode 128 may define a working end configured to apply electrosurgical energy to tissue. The proximal portion 128B of the electrosurgical electrode 128 may include a first leg 1684A extending from the distal end 126B of the shaft 126 and a second leg 1684B extending from the distal end of the conductive portion 126C of the shaft 126.

[0156] exist Figure 16 In this configuration, the first leg 1684A and the second leg 1684B are radially opposed to each other around the perimeter of the distal end 126B of the shaft 126. Furthermore, the proximal surface 1685 of the proximal portion 128B of the electrosurgical electrode 128 may taper distally toward the central axis of the shaft 126 to define a gap 1686 between the proximal surface 1685 and the plane 1687 at the distal end of the shaft 126. The gap 1686 helps improve airflow and suction at the distal end 126B of the shaft 126.

[0157] In addition, such as Figure 16 As shown, the sleeve structure of the insulator portion 126D may extend around the optical lens assembly 142. The sleeve structure may be made of an optically opaque material. To enhance the intensity of light emitted from the optical lens assembly 142, at least a portion of each distal transmission surface of the optical lens assembly 142 may extend to a position at the distal end of the sleeve structure of the insulator portion 126D.

[0158] Return to reference Figure 15 The shaft 126 may include an electrical contact 1570 that engages with a housing conductor 134, the housing conductor 134 being parallel to a longitudinal axis 1482 of the handle 124 (e.g., ...). Figure 14 (As shown) Extends along the handle 124 in the direction shown. The electrical contact 1570 can be configured to remain engaged with the housing conductor 134 while the shaft 126 moves telescopically relative to the handle 124. For example, the electrical contact 1570 is fixedly coupled to the shaft 126 such that the electrical contact 1570 moves together with the shaft 126 relative to the handle 124. In this arrangement, the electrical contact 1570 can continuously engage and be electrically coupled to the housing conductor 134 while sliding along the housing conductor 134 in response to axial movement of the shaft 126 relative to the handle 124.

[0159] Furthermore, the electrical contact 1570 can extend around the perimeter of the shaft 126, such that the electrical contact 1570 remains engaged with the housing conductor 134 in all rotational positions of the shaft 126 and the electrosurgical electrode 128 relative to the handle 124. In this way, the electrical contact 1570 can facilitate the supply of electrosurgical energy to the electrosurgical electrode 128 in any rotational and / or axial position relative to the handle 124.

[0160] In one example, shaft 126 and electrosurgical electrode 128 can rotate more than 360 degrees relative to handle 124. In this example, electrical contact 1570 can extend entirely around the perimeter of shaft 126. In another example, shaft 126 and electrosurgical electrode 128 can rotate less than 360 degrees relative to handle 124. In this example, electrical contact 1570 can extend around at least a portion of the perimeter of shaft 126, which is sufficient to maintain electrical coupling between shaft 126 and housing conductor 134 throughout the entire range of rotational positions in which shaft 126 and electrosurgical electrode 128 can rotate relative to handle 124.

[0161] As described above, the electrosurgical electrode 128 may include a proximal portion 128B extending from the distal end of the shaft 126 and a distal portion 128A including a working end configured to apply electrosurgical energy to tissue. Figure 14-16 In this arrangement, the central axis of the distal portion 128A of the electrosurgical electrode 128 and the central axis of the smoke exhaust channel 148 are collinear. In this arrangement, the smoke exhaust channel 148 can have a substantially constant dimension around the perimeter of the electrosurgical electrode 128. This can help provide a relatively consistent suction force at every point around the electrosurgical electrode 128. However, in other examples, the central axis of the electrosurgical electrode 128 and the central axis of the shaft 126 can be offset relative to each other and parallel to each other.

[0162] In addition, such as Figure 14-16 As shown, the smoke exhaust channel 148 defines a space without any other structures between its proximal end 148A and its distal end 148B. This allows for more efficient use of the relatively limited internal chamber 1468 to enhance suction via the smoke exhaust channel 148 compared to other embodiments where the electrosurgical electrode 128 and / or other components are disposed within the smoke exhaust channel 148.

[0163] Furthermore, as described above, the smoke exhaust channel 148 can be fixed in a non-rotatable manner relative to the handle 124, such that the shaft 126 and the electrosurgical electrode 128 can rotate relative to the smoke exhaust channel 148. Figure 17-18 The smoke exhaust duct 148 and shaft 126 are depicted according to an example. (See example...) Figure 15 and Figure 17-18 As shown, at least a portion of the smoke exhaust channel 148 may have a non-circular shape to prevent rotation of the smoke exhaust channel 148 relative to the handle 124 while the shaft 126 and the electrosurgical electrode 128 rotate relative to the handle 124.

[0164] For example, the proximal end 148A of the smoke exhaust duct 148 may include a non-rotating fitting configured to engage with a corresponding shaped structure in the handle 124, and the non-rotating fitting may have a non-circular cross-sectional shape. For example, in Figure 15 and Figure 17 In the process, the proximal end 148A of the smoke exhaust channel 148 has a hexagonal feature, which engages with a hexagonal socket formed in the inner wall of the handle 124 to prevent rotation between the smoke exhaust channel 148 and the handle 124. Furthermore, as... Figure 18 As shown, a gap can be defined between the shaft 126 and the smoke exhaust channel 148 to allow the shaft 126 to rotate relative to the smoke exhaust channel 148.

[0165] like Figure 17 As shown, a non-rotating fitting at the proximal end 148A of the smoke exhaust channel 148 may include a through-hole 1774, the cross-sectional area of ​​which is smaller than the cross-sectional area of ​​the body 148C of the smoke exhaust channel 148 located proximal to the non-rotating fitting. The relatively small size of the through-hole 1774 helps to guide smoke into a relatively small space as it exits the proximal end 148A of the smoke exhaust channel 148. This can advantageously help reduce or prevent the electrical components in the internal bore 125 of the handle 124 from being exposed to smoke.

[0166] Figure 19 The smoke exhaust duct 148, as shown in the example, is depicted by light source 140, Figures 5A-5B A partial exploded view of the assembly consisting of the optical lens assembly 142 and the heat sink 1580. Figure 20 Depicting by Figures 5A-5B The assembly shown consists of an optical lens assembly 142 and an electrosurgical electrode 128.

[0167] like Figure 15-16 and Figures 19-20 As shown, the electrosurgical device 112 may include an optical lens assembly 142 and a light source 140 located in the shaft 126 of the housing 123. As described above, the light source 140 is configured to emit light into the optical lens assembly 142, and the optical lens assembly 142 is configured to transmit light from the light source 140 in a distal direction and emit light from the distal end 126B of the shaft 126.

[0168] like Figure 20 As shown, the electrosurgical electrode 128 has a longitudinal axis 2031 extending between the proximal and distal ends of the electrosurgical electrode 128. The light source 140 is arranged circumferentially around the longitudinal axis 2031 of the electrosurgical electrode 128. For example, as... Figure 20As shown, the lens aperture 411 may have a central axis collinear with the longitudinal axis 2031 of the electrosurgical electrode 128. Positioning the light source 140 around the electrosurgical electrode 128 helps distribute light across the entire perimeter of the electrosurgical electrode 128, which can help reduce shading and provide greater illumination uniformity during all rotational alignment of the electrosurgical electrode 128 relative to the handle 124 and / or the electrosurgical device 112 relative to the target tissue.

[0169] Furthermore, the smoke exhaust channel 148 can extend through the lens aperture 411 in the optical lens assembly 142 and the PCB aperture 409 in the LED PCB 407. This helps to position the smoke exhaust channel 148 at the center of the axis 126 (e.g., the central axis of the smoke exhaust channel 148 and the central axis of the axis 126 can be collinear), which can enhance suction at the surgical site. In this arrangement, the electrosurgical device 112 can provide illumination and suction around the perimeter of the electrosurgical electrode 128. Furthermore, Figure 3 and Figures 5A-5B The integration of the optical lens assembly 142 in this arrangement can improve illumination quality, reduce the size of the distal end of the electrosurgical device, and improve the field of vision at the surgical site.

[0170] In one example, the light source 140, optical lens assembly 142, and / or heat sink 1580 may be fixedly coupled to the handle 124. In this arrangement, the shaft 126 and the electrosurgical electrode 128 may rotate about the light source 140, optical lens assembly 142, and / or heat sink 1580. For example, the light source 140, optical lens assembly 142, and / or heat sink 1580 may have a non-circular shape, which may engage with the non-circular shape of the body 148C of the smoke exhaust channel 148 to prevent rotation of the light source 140, optical lens assembly 142, and / or heat sink 1580 relative to the handle 124 while the shaft 126 and electrosurgical electrode 128 rotate relative to the handle 124. Figures 19-20 In this example, the non-circular shape is elliptical. However, in other examples, the light source 140, the optical lens assembly 142, the heat sink 1580, and / or the smoke exhaust channel 148 may have other non-circular shapes.

[0171] Furthermore, in this arrangement, the light source 140, optical lens assembly 142, and heat sink 1580 can be telescopically movable relative to the handle 124 along with the shaft 126. As described above, the housing conductor 134 and shaft conductor 136 can electrically couple the light source 140 to the DC power supply 144 during this telescopic movement. Figure 19 As shown, shaft 126 may include a positive photoconductor 1536A and a negative photoconductor 1536B, which slidably engage corresponding electrical conductors in handle 124 while shaft 126 moves telescopically relative to handle 124 in the axial direction.

[0172] Now for reference Figure 21 This shows an example. Figure 3 A cross-sectional view of the optical component 301 of the optical lens assembly 142 shown. Figure 21 As shown, the optical lens assembly 142 includes a near-side reflective surface 303 and a far-side transmissive surface 305, both having aspherical shapes. Furthermore, Figure 21 A light source 140 is depicted being received at the proximal end 142A in a cavity 415 of an optical component 301. Figure 21 The light trail is further depicted, showing exemplary light emitted by light source 140, which is reflected and collimated by near-side reflective surface 303 as it propagates to the distal transmissive surface 305.

[0173] Figure 22 Depicting according to the example Figures 4A-4B An exemplary optical output pattern of the optical lens assembly 142 shown. Figure 23 Depicting according to the example Figures 5A-5B An exemplary optical output pattern of the optical lens assembly 142 shown.

[0174] Now for reference Figure 24 A flowchart illustrating the procedure 2400 for operating an electrosurgical device according to an example is shown. Figure 24 As shown, process 2400 may include providing an electrosurgical device at block 2410. The electrosurgical device may include a housing having a proximal end and a distal end. The electrosurgical device may also include electrosurgical electrodes extending in a distal direction from the distal end of the housing and a plurality of light sources located within the housing. These plurality of light sources may be configured to generate light.

[0175] Furthermore, the electrosurgical device may include an optical lens assembly having a proximal end and a distal end. The optical lens assembly may include multiple optical components that are (i) coupled to each other at the distal end of the optical lens assembly and (ii) separated from each other at the proximal end of the optical lens assembly. Each optical component is optically coupled to a corresponding light source among a plurality of light sources. Each optical component includes a proximal reflecting surface extending distally from the corresponding light source to which it is optically coupled and a distal transmitting surface located at the distal end of the optical lens assembly. The proximal reflecting surface is configured to reflect light emitted by the corresponding light source toward the distal end. The proximal reflecting surface may have an aspherical shape configured to substantially collimate the light reflected by the proximal reflecting surface. The distal transmitting surface is configured to output light from the optical component in a distal direction.

[0176] At block 2412, process 2400 includes emitting light through multiple light sources. After emitting light at block 2412, process 2400 includes transmitting light through each optical component at block 2414 in such a way as to: (i) reflect light toward the distal end in a substantially collimated manner through the near-side reflective surface of the optical component at block 2416, and (ii) output light in a distal direction through the distal-side transmittance surface of the optical component at block 2418.

[0177] Figure 25-30 Additional aspects of process 2400, based on other examples, are described. Figure 25 As shown, process 2400 may also include supplying electrosurgical energy to the electrosurgical electrode at block 2420. In one example, supplying electrosurgical energy to the electrosurgical electrode at block 2420 may be performed simultaneously with emitting light at block 2412.

[0178] like Figure 26 As shown, light reflected by the near-side reflective surface at box 2416 may include light reflected by total internal reflection at box 2422. Figure 26 In the example shown, the near-side reflecting surface can be a total internal reflection (TIR) ​​reflector.

[0179] exist Figure 27 In the example shown, at the proximal end of the optical lens assembly, each optical component may define a chamber in which individual light sources are positioned, such that multiple light sources are located distal to the nearest side surface of the optical lens assembly. Figure 27 As shown, emitting light at block 2412 may include emitting light from multiple light sources at block 2424 at a position located on the far side of the nearest side surface of the optical lens assembly.

[0180] like Figure 28 As shown, emitting light at box 2412 may include emitting light from multiple light sources across the air gap to the near-side reflective surface at box 2426.

[0181] like Figure 29 As shown, emitting light at box 2412 may include emitting light from multiple light sources at box 2428, which are equidistantly spaced around the longitudinal axis of the electrosurgical electrode.

[0182] like Figure 30 As shown, the output light in the far-side direction through the far-side transmission surface at box 2418 may include the transmission of light through the aspherical lens of each far-side transmission surface at box 2430.

[0183] like Figure 31 As shown, the light output in the far-side direction through the far-side transmission surface at box 2418 may include the light transmitted through the Fresnel lens of each far-side transmission surface at box 2432.

[0184] exist Figure 32 In the example shown, multiple light sources may include multiple light-emitting diodes (LEDs) coupled to a printed circuit board (PCB). Furthermore, the PCB may include a ring with PCB vias. The electrosurgical device may include a suction tube extending through the PCB vias and vias in an optical lens assembly. Multiple light sources may be positioned around the perimeter of the suction tube. The distal end of the optical lens assembly may extend around the perimeter of the suction tube. Figure 32 As shown, process 2400 may also include applying a suction force to the suction tube at box 2434.

[0185] like Figure 33 As shown, the light output at box 2418 may include the light output at box 2436, such that the light emitted by the optical lens assembly has a substantially uniform light intensity at every point in space at a plane located on the distal side of the distal end of the electrosurgical electrode.

[0186] like Figure 34 As shown, outputting light at block 2418 may include outputting light at block 2438, such that the light defines a light pattern at a plane located at the far end, and the light intensity at the weakest part of the light pattern has an intensity of at least 50% of the light intensity at the strongest part of the light pattern.

[0187] Descriptions of different advantageous arrangements have been made for illustrative and descriptive purposes and are not intended to be exhaustive or limited to the examples disclosed. Many modifications and variations will be apparent to those skilled in the art. Furthermore, different advantageous examples may describe different advantages compared to other advantageous examples. The disclosure of various examples with various modifications suitable for the particular intended use is provided to explain the principles, practical applications, and to enable those skilled in the art to understand the content of the disclosure.

[0188] Furthermore, it is contemplated that any optional feature of the described inventive variant may be proposed and claimed individually or in combination with any one or more of the features described herein. Similarly, references to singular items include the possibility that multiple identical items are presented. More specifically, as used herein and in the appended claims, the singular forms “a,” “an,” “the,” and “the” include plural references unless the context clearly specifies otherwise. It should also be noted that the drafting of the claims may exclude any optional elements. Therefore, this statement is intended to use proprietary terms such as “alone,” “only,” or a “negative” basis of reference in conjunction with the stated claim elements. Unless otherwise defined herein, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The scope of this application is not limited to the subject matter patent specification but only to the explicit meaning of the claim terminology used.

Claims

1. An electrosurgical device, comprising: A housing having a proximal end and a distal end; An electrosurgical electrode, the electrosurgical electrode extending distally from the distal end of the housing; A plurality of light sources located within the housing, wherein the plurality of light sources are configured to generate light; and An optical lens assembly having a near end and a far end, The optical lens assembly includes a plurality of optical components, which are (i) coupled to each other at the distal end of the optical lens assembly and (ii) separated from each other at the proximal end of the optical lens assembly. Each optical component is optically coupled to a corresponding light source among the plurality of light sources, and Each optical component includes: A proximal reflecting surface extends distally from the corresponding light source optically coupled to the optical component, wherein the proximal reflecting surface is configured to reflect light emitted by the corresponding light source toward the distal end of the optical lens assembly, the proximal reflecting surface having an aspherical shape configured to substantially collimate the light reflected by the proximal reflecting surface, and A distal transmission surface located at the distal end of the optical lens assembly, wherein the distal transmission surface is configured to output light from the optical component in the distal direction. In the optical lens assembly, each optical component defines a cavity at the proximal end, and the corresponding light source is positioned in the cavity such that the plurality of light sources are located on the far side of the nearest side surface of the optical lens assembly.

2. The electrosurgical device as claimed in claim 1, wherein, The near-side reflective surface includes a total internal reflection reflector.

3. The electrosurgical device as claimed in claim 2, wherein, The proximal reflective surface and the housing are separated from each other, such that an air gap surrounds the proximal reflective surface.

4. The electrosurgical device as claimed in claim 3, wherein, Each optical component is separated from the corresponding light source optically coupled to the optical component by an air gap.

5. The electrosurgical device according to any one of claims 1-4, wherein, The electrosurgical electrode has a longitudinal axis extending between its proximal end and its distal end, and The plurality of light sources are arranged circumferentially around the longitudinal axis of the electrosurgical electrode.

6. The electrosurgical device as claimed in claim 5, wherein, The plurality of light sources consists of three light sources that are equidistant from each other around the longitudinal axis of the electrosurgical electrode.

7. The electrosurgical device as claimed in claim 5, wherein, The optical lens assembly defines an aperture with a central axis that is collinear with the longitudinal axis of the electrosurgical electrode.

8. The electrosurgical device according to any one of claims 1-4, wherein, Each distal transmission surface is an aspherical lens.

9. The electrosurgical device according to any one of claims 1-4, wherein, Each distal transmission surface is a Fresnel lens.

10. The electrosurgical device as claimed in claim 9, wherein, The Fresnel lens has a flat surface at its distal end. The flat surface at the distal end defines a plurality of concentric rings, and Each ring has its own optical properties, and The optical properties of the plurality of rings are different from each other, so that the flat surface at the distal end transmits light in an manner similar to an aspherical lens.

11. The electrosurgical device of claim 10, wherein, The flat surface at the distal end includes a plurality of small lenses.

12. The electrosurgical device according to any one of claims 1-4, wherein, The optical lens assembly includes an inner surface and an outer surface. The inner surface defines a through hole. Wherein, between the near-side reflective surface and the far-side transmissive surface, the cross-section of the optical lens assembly has a non-circular shape at the inner surface and a circular shape at the outer surface.

13. The electrosurgical device of claim 12, wherein, The non-circular shape is elliptical.

14. The electrosurgical device according to any one of claims 1-4, wherein, Less than 10% of the light from one of the plurality of optical components passes through an adjacent optical lens component.

15. The electrosurgical device of claim 14, wherein, A portion of the light emitted by one of the plurality of optical components overlaps with a portion of the light emitted by another of the plurality of optical components.

16. The electrosurgical device according to any one of claims 1-4, wherein, The housing includes: A handle, the handle having a proximal end and a distal end; and A shaft extending from the distal end of the housing. The electrosurgical electrode extends from the distal end of the shaft, and The plurality of light sources are located in the axis.

17. The electrosurgical device of claim 16, wherein, The shaft includes a tube and a sleeve structure extending distally from the tube. The sleeve structure extends around the optical lens assembly, and Each distal transmission surface is located on the far side of the farthest end of the sleeve structure.

18. The electrosurgical device of claim 16, wherein, The plurality of light sources includes a plurality of light-emitting diodes coupled to a printed circuit board, and The printed circuit board includes a ring with printed circuit board apertures.

19. The electrosurgical device of claim 18, wherein, Each light-emitting diode consists of a die and a protective layer.

20. The electrosurgical device of claim 18, wherein, Each LED has a diameter of 1 to 2 millimeters.

21. The electrosurgical device of claim 18, wherein, The electrosurgical device also includes a suction tube that extends through printed circuit board apertures in the printed circuit board and apertures in the optical lens assembly. The plurality of light sources are positioned around the perimeter of the suction tube, and The distal end of the optical lens assembly extends around the perimeter of the suction tube.

22. The electrosurgical device according to any one of claims 1-4, wherein, At the plane located distal to the distal end of the electrosurgical electrode, the light emitted by the optical lens assembly has a substantially uniform light intensity at every point in space.

23. The electrosurgical device of claim 22, wherein, The light emitted by the optical lens assembly defines a light pattern at the plane located on the far side of the far end, and The intensity of the light at the weakest part of the light pattern is at least 50% of the intensity of the light at the strongest part of the light pattern.

24. A method of using an electrosurgical device, comprising: An electrosurgical device is provided, the electrosurgical device comprising: A housing having a proximal end and a distal end; An electrosurgical electrode, the electrosurgical electrode extending distally from the distal end of the housing; A plurality of light sources located within the housing, wherein the plurality of light sources are configured to generate light; and An optical lens assembly having a near end and a far end, The optical lens assembly includes a plurality of optical components, which are (i) coupled to each other at the distal end of the optical lens assembly and (ii) separated from each other at the proximal end of the optical lens assembly. Each optical component is optically coupled to a corresponding light source among the plurality of light sources, and Each optical component includes: (a) A proximal reflecting surface extending distally from a corresponding light source optically coupled to the optical component, wherein the proximal reflecting surface is configured to reflect light emitted by the corresponding light source toward the distal end, the proximal reflecting surface having an aspherical shape configured to substantially collimate the light reflected by the proximal reflecting surface, and (b) A distal transmission surface located at the distal end of the optical lens assembly, wherein the distal transmission surface is configured to output light from the optical component in the distal direction; The light is emitted through the plurality of light sources; and After the light is emitted, it is transmitted through each optical component in the following manner: The light is reflected toward the distal end in a substantially collimated manner by the near-side reflective surface of the optical component, and The light is output in the far-side direction through the far-side transmission surface of the optical component. Wherein, at the proximal end of the optical lens assembly, each optical component defines a cavity, and the corresponding light source is positioned within the cavity such that the plurality of light sources are located distal to the nearest side surface of the optical lens assembly, and The emission of light includes emitting light from the plurality of light sources at a position located on the far side of the nearest side surface of the optical lens assembly.

25. The method of claim 24, wherein, The near-side reflective surface includes a total internal reflection reflector, and The reflection of light by the near-side reflective surface includes the reflection of light by total internal reflection.

26. The method of claim 25, wherein, Emitting the light includes emitting light from the plurality of light sources across the air gap onto the proximal reflective surface.

27. The method of any one of claims 24-26, wherein, Emitting the light includes emitting the light from the plurality of light sources, which are equidistantly spaced around the longitudinal axis of the electrosurgical electrode.

28. The method of any one of claims 24-26, wherein, The output of light in the distal direction through the distal transmission surface includes an aspherical lens that transmits the light through each distal transmission surface.

29. The method according to any one of claims 24-26, wherein, The output of light in the distal direction through the distal transmission surface includes a Fresnel lens that transmits the light through each distal transmission surface.

30. The method according to any one of claims 24-26, wherein, The multiple light sources include multiple light-emitting diodes coupled to a printed circuit board. The printed circuit board includes a ring with printed circuit board apertures, and The electrosurgical device includes a suction tube that extends through holes in the printed circuit board and holes in the optical lens assembly. The plurality of light sources are positioned around the perimeter of the suction tube, and Wherein, the distal end of the optical lens assembly extends around the perimeter of the suction tube, and The method further includes applying a suction force to the suction tube.

31. The method according to any one of claims 24-26, wherein, Outputting the light includes outputting the light such that, at a plane located distal to the distal end of the electrosurgical electrode, the light emitted by the optical lens assembly has a substantially uniform light intensity at every point in space.

32. The method of claim 31, wherein, Outputting the light includes outputting the light such that the light defines a light pattern at a plane located on the far side of the far end, and the intensity of the light at the weakest part of the light pattern has an intensity of at least 50% of the intensity of the light at the strongest part of the light pattern.

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