Tissue resection instrument

Abstract

An end effector assembly of a tissue resection device includes an outer shaft defining a window, a drive wire extending through the outer shaft, and a distal cutting tip disposed within the outer shaft. The drive wire includes a cylindrical body and a distal tip portion defining a semi-cylindrical configuration including a semi-cylindrical bottom surface and a planar top surface having a semi-cylindrical cut-out defined therein. The distal cutting tip at least partially overlaps the window and has a semi-cylindrical lumen defined by a semi-cylindrical bottom surface and an open top. The distal tip portion of the drive wire is at least partially received and within the semi-cylindrical lumen with the semi-cylindrical surfaces generally mating. The drive wire is configured to drive rotation or oscillation of the distal cutting tip relative to the outer shaft.

Description

Technical Field

[0001] This disclosure generally relates to the field of tissue resection. More specifically, this disclosure relates to a tissue resection instrument configured to facilitate the removal and excision of tissue from internal surgical sites (e.g., the uterus). Background Technology

[0002] Tissue removal can be performed endoscopically inside organs such as the uterus. This is done by inserting an endoscope (or hysteroscope) into the uterus and allowing tissue removal instruments to pass through the endoscope (or hysteroscope) and into the uterus. For such endoscopic tissue removal procedures, it is usually necessary to dilate the uterus with a fluid such as saline, sorbitol, or glycine. During the procedure, the inflow and outflow of fluid keeps the uterus in a dilated state and flushes tissue and other debris from within the uterus to maintain visible working space. Summary of the Invention

[0003] As used herein, the term "far side" refers to the portion described that is further away from the user, while the term "proximal side" refers to the portion described that is closer to the user. Furthermore, to the extent consistent, any or all aspects described herein may be used in conjunction with any or all other aspects described herein.

[0004] According to various aspects of this disclosure, an end effector assembly of a tissue resection apparatus is provided, comprising an outer shaft, a drive line, a distal cutting tip, a hub housing, and a actuator. The outer shaft defines a proximal end portion and a distal end portion. The distal end portion of the outer shaft defines a window passing through it. The drive line extends through the outer shaft and defines the proximal end portion and the distal end portion. The distal cutting tip is disposed within the outer shaft and engages with the distal end portion of the drive line. The distal cutting tip at least partially overlaps the window. The hub housing engages with the proximal end portion of the outer shaft. The actuator is disposed within the hub housing and engages with the proximal end portion of the drive line. The actuator is configured to be driven to rotate relative to the hub housing, thereby causing the drive line and the distal cutting tip to rotate within and relative to the outer shaft. The actuator defines a cavity and at least one lateral opening disposed in communication with the cavity. An outflow path is defined as passing through the window through the outer shaft and around the drive line into the hub housing, through the at least one lateral opening, and through the cavity.

[0005] In one aspect of this disclosure, the outer shaft includes a cut edge surrounding the window. The cut edge defines a plurality of cutting teeth.

[0006] In another aspect of this disclosure, the distal cutting tip is defined as an opening communicating with the window in at least one rotational orientation of the distal cutting tip relative to the outer shaft. In such an aspect, the outflow path may be further defined as passing through the opening from the window, through the outer shaft and around the drive line into the hub housing, through at least one lateral opening, and through the inner cavity. Alternatively or additionally, the distal cutting tip may include a plurality of teeth disposed along opposite sides of the opening.

[0007] In another aspect of this disclosure, the proximal extension extends proximally from the hub housing and defines an interior in fluid communication with the inner cavity, such that the outflow path is further defined as from the inner cavity to the proximal extension. In such an aspect, the proximal extension may further define an outflow opening to further define an outflow path from the interior of the proximal extension through the outflow opening.

[0008] According to various aspects of this disclosure, another end effector assembly of a tissue resection apparatus is provided, comprising an outer shaft, a drive line, a distal cutting tip, a hub housing, and a drive. The outer shaft defines a proximal end portion and a distal end portion, the distal end portion defining a window therethrough. The drive line extends through the outer shaft and defines the proximal end portion and the distal end portion. The proximal end portion of the drive line includes a longitudinal extension and fingers disposed at an angle to the longitudinal extension. The distal cutting tip is disposed within the outer shaft, engages with the distal end portion of the drive line, and at least partially overlaps with the window. The hub housing engages with the proximal end portion of the outer shaft. The drive is disposed within the hub housing and defines a longitudinally extending slot and a transverse slot, the transverse slot being disposed in angular communication with the longitudinally extending slot. The longitudinally extending slot is configured to receive the longitudinal extension of the drive line, and the transverse slot is configured to receive the fingers of the drive line, thereby engaging the drive with the proximal end portion of the drive line. The driver is configured to be driven to rotate relative to the hub housing, thereby causing the drive line and the distal cutting tip to be within and rotated relative to the outer shaft.

[0009] In one aspect of this disclosure, the finger is positioned at approximately a 90-degree angle to the longitudinal extension, and the transverse slot is positioned at approximately a 90-degree angle to the longitudinally extending slot.

[0010] In another aspect of this disclosure, the outer shaft includes a cut edge surrounding the window. The cut edge defines a plurality of cutting teeth.

[0011] In another aspect of this disclosure, the distal cutting tip is defined as an opening communicating with a window in at least one rotational orientation of the distal cutting tip relative to an outer axis. In such an aspect, the distal cutting tip may include a plurality of teeth disposed along opposite sides of the opening.

[0012] In another aspect of this disclosure, the adhesive between at least one of the longitudinally extending slots and the longitudinally extending segment or the transverse slot and the finger further ensures engagement between the actuator and the proximal end portion of the drive line.

[0013] In another aspect of this disclosure, the actuator is overmolded around the proximal end portion of the drive line to thereby define a longitudinally extending slot that receives the longitudinally extending segment, and a transverse slot that receives the finger and engages the actuator around the proximal end portion of the drive line.

[0014] In another aspect of this disclosure, the actuator defines first and second lateral openings on both sides of a longitudinally extending slot and is arranged to communicate with the interior cavity of the actuator.

[0015] According to various aspects of this disclosure, another end effector assembly of a tissue resection apparatus is provided, comprising an outer shaft, a drive line, a distal cutting tip, a hub housing, a driver, and a connector. The outer shaft defines a proximal end portion and a distal end portion, the distal end portion defining a window therethrough. The drive line extends through the outer shaft and defines the proximal and distal end portions. The distal cutting tip is disposed within the outer shaft, engages with the distal end portion of the drive line, and at least partially overlaps the window. The hub housing engages with the proximal end portion of the outer shaft. The driver is disposed within the hub housing and configured to be driven to rotate relative to the hub housing. The connector connects the proximal end portion of the drive line to the driver, such that the driver rotates relative to the hub housing, thereby causing the drive line and the distal cutting tip to rotate within and relative to the outer shaft.

[0016] In one aspect of this disclosure, the outer shaft includes a cut edge surrounding the window. The cut edge defines a plurality of cutting teeth.

[0017] In another aspect of this disclosure, the distal cutting tip is defined as an opening communicating with the window in at least one rotational orientation of the distal cutting tip relative to the outer axis. In this aspect, the distal cutting tip may include a plurality of teeth disposed along opposite sides of the opening.

[0018] In another aspect of this disclosure, the connector engages with the proximal end portion of the drive line in a first manner and with the driver in a different second manner.

[0019] According to various aspects of this disclosure, an end effector assembly of a tissue resection device is also provided, comprising an outer shaft, a drive line, and a distal cutting tip. The outer shaft has a proximal end portion and a distal end portion, the distal end portion defining a window therethrough. The drive line extends through the outer shaft and includes a cylindrical body and a distal end portion, the distal end portion defining a semi-cylindrical configuration comprising a semi-cylindrical bottom surface and a planar top surface. A semi-cylindrical cut is defined within the planar top surface. The distal cutting tip is disposed within the outer shaft and at least partially overlaps with the window. The distal cutting tip has a semi-cylindrical lumen defined by the semi-cylindrical bottom surface and an open top. The distal end portion of the drive line is at least partially received within and engages in the semi-cylindrical lumen of the distal cutting tip, wherein the semi-cylindrical bottom surface of the distal end portion of the drive line substantially mates with the semi-cylindrical bottom surface of the distal cutting tip. The drive line is configured to drive the distal cutting tip to rotate or oscillate relative to the outer shaft.

[0020] In one aspect of this disclosure, the distal cutting tip includes a plurality of teeth extending along a portion of its length. The plurality of teeth includes a first set of teeth disposed on a first side of a semi-cylindrical lumen and a second set of teeth disposed on an opposite second side of the semi-cylindrical lumen.

[0021] In another aspect of this disclosure, the distal end of the distal end portion of the drive line does not extend distally beyond the first tooth of each of the first and second sets of teeth. Alternatively or additionally, the distal end of the distal end portion of the drive line is located proximal to the plurality of teeth.

[0022] In another aspect of this disclosure, the drive line includes a transition portion disposed between the cylindrical body and the distal end portion. The transition portion includes a curved surface. In this aspect, a semi-cylindrical cutout may include a transition portion defined within the transition portion of the drive line. The transition portion of the semi-cylindrical cutout is defined by a curved bottom surface.

[0023] In another aspect of this disclosure, the distal end portion of the drive line includes an inclined distal surface.

[0024] According to various aspects of this disclosure, another end effector assembly of a tissue resection apparatus is provided, comprising an outer shaft, a drive wire, and a distal cutting tip. The outer shaft defines a proximal end portion and a distal end portion, the distal end portion defining a window therethrough. The drive wire extends through the outer shaft and includes at least a partially cylindrical surface. The distal cutting tip is disposed within the outer shaft and at least partially overlaps the window. The distal cutting tip defines a semi-cylindrical lumen defined by a semi-cylindrical bottom surface and an open top. The distal cutting tip further includes a slot defined through the semi-cylindrical bottom surface. The distal end portion of the drive wire is at least partially received within and engages in the semi-cylindrical lumen of the distal cutting tip. The at least partially cylindrical surface extends at least partially into the slot. The drive wire is configured to drive the distal cutting tip to rotate or oscillate relative to the outer shaft.

[0025] In one aspect of this disclosure, the drive line includes a cylindrical body, and the distal end portion of the drive line defines a semi-cylindrical configuration comprising a semi-cylindrical bottom surface and a planar top surface. The semi-cylindrical bottom surface serves as at least a partially cylindrical surface extending at least partially into the slot.

[0026] In another aspect of this disclosure, the drive line includes a transition portion disposed between the cylindrical body and the distal end portion.

[0027] In another aspect of this disclosure, the planar top surface of the distal end portion of the drive line is recessed relative to the open top of the distal cutting tip.

[0028] In another aspect of this disclosure, the distal cutting tip includes a plurality of teeth extending along a portion of its length. The plurality of teeth includes a first set of teeth disposed on a first side of the semi-cylindrical lumen and a second set of teeth disposed on an opposite second side of the semi-cylindrical lumen.

[0029] According to various aspects of this disclosure, another end effector assembly of a tissue resection apparatus is provided, comprising an outer shaft, a drive line, and a distal cutting tip. The outer shaft has a proximal end portion and a distal end portion, the distal end portion defining a window therethrough. The drive line extends through the outer shaft and defines a cylindrical configuration. The distal cutting tip is disposed within the outer shaft and at least partially overlaps the window. The distal cutting tip defines a semi-cylindrical lumen defined by a semi-cylindrical bottom surface and an open top. The drive line extends distally into the distal cutting tip by a distance not exceeding 20% ​​of the length of the distal cutting tip and engages within the distal cutting tip. The drive line is configured to drive the distal cutting tip to rotate or oscillate relative to the outer shaft.

[0030] In one aspect of this disclosure, the drive line extends distally to a distance not exceeding 17% of the length of the distal cutting tip. In another aspect, the drive line extends distally to a distance not exceeding 15% of the length of the distal cutting tip.

[0031] In another aspect of this disclosure, the distal cutting tip includes a plurality of teeth extending along a portion of its length. The plurality of teeth includes a first set of teeth disposed on a first side of the semi-cylindrical lumen and a second set of teeth disposed on an opposite second side of the semi-cylindrical lumen.

[0032] In another aspect of this disclosure, the distal end of the drive line is spaced proximally from a plurality of teeth.

[0033] In another aspect of this disclosure, the drive wire is joined within the cutting tip by lap welding or butt welding. Attached Figure Description

[0034] Various aspects and features of this disclosure are described below with reference to the drawings, wherein the same numbers designate the same or corresponding elements in each of the several views.

[0035] Figure 1 A perspective view of the end effector assembly of a tissue resection instrument provided according to various aspects of this disclosure;

[0036] Figure 2 for Figure 1 An enlarged perspective view of the proximal end portion of the end effector assembly;

[0037] Figure 3 To cross Figure 2 The longitudinal cross-sectional view of the section cut by section line "3,4-3,4";

[0038] Figure 4 To cross Figure 2 The longitudinal cross-sectional view taken by the section line "3,4-3,4";

[0039] Figure 5 for Figure 1 An exploded perspective view of the end effector component;

[0040] Figure 6 In order to be in Figure 5 A magnified perspective view of the detail area indicated by "6" in the center;

[0041] Figure 7 To show Figure 1 Exploded perspective view of the drive line, cutting tip, and a portion of the drive assembly of the end effector component;

[0042] Figure 8 In order to be in Figure 5 A magnified perspective view of the detail area indicated by "8" in the center;

[0043] Figure 9 To show Figure 1 An exploded perspective view of the outer shaft and a portion of the hub assembly of the end effector assembly;

[0044] Figure 10-12 In order to be in Figure 1 An enlarged perspective view of the detailed area indicated by "10" shows the cutting tip inside the outer axis and rotating relative to the outer axis;

[0045] Figure 13 To cross Figure 10 The longitudinal cross-sectional view taken by section line "13-13";

[0046] Figure 14 for Figure 1 An enlarged perspective view of another construction of the distal end portion of the end effector assembly;

[0047] Figure 15 To cross Figure 14 The longitudinal cross-sectional view taken by section line "15-15";

[0048] Figure 16 for Figure 1 An enlarged perspective view of another construction of the distal end portion of the end effector assembly;

[0049] Figure 17 To cross Figure 16 The longitudinal cross-sectional view taken by section line "17-17";

[0050] Figure 18 An enlarged perspective view of the distal end portion of another end effector assembly provided according to various aspects of this disclosure;

[0051] Figure 19 An enlarged perspective view of the distal end portion of another end effector assembly provided in accordance with various aspects of this disclosure;

[0052] Figure 20 To cross Figure 19 The longitudinal cross-sectional view taken by section line "20-20";

[0053] Figure 21 To cross Figure 20 The longitudinal cross-sectional view taken by section line "21-21";

[0054] Figure 22 To make the drive line and Figure 1 A longitudinal cross-sectional view of another configuration of the distal drive engagement of the end effector assembly;

[0055] Figure 23 This is a perspective view of a tissue resection instrument provided according to various aspects of this disclosure, including an assembly engaged with a handheld component. Figure 1 The end effector component;

[0056] Figure 24 for Figure 1 An enlarged perspective view of another construction of the distal end portion of the end effector assembly, with the outer axis shown in dashed lines;

[0057] Figure 25 To cross Figure 24 The longitudinal cross-sectional view taken by section line "25-25";

[0058] Figure 26 To cross Figure 25 A transverse cross-sectional view taken by section line "26-26";

[0059] Figure 27 for Figure 1 An enlarged perspective view of another construction of the distal end portion of the end effector assembly, with the outer axis shown in dashed lines;

[0060] Figure 28 To cross Figure 27 The longitudinal cross-sectional view taken by section line "28-28";

[0061] Figure 29 To cross Figure 28 A transverse cross-sectional view taken by section line "29-29";

[0062] Figure 30 for Figure 1 An enlarged top perspective view of the distal end portion of the end effector assembly, with the outer axis shown in dashed lines.

[0063] Figure 31 For example Figure 30 An enlarged bottom perspective view of the construction of the distal end portion of the end effector assembly shown;

[0064] Figure 32 To cross Figure 30 The longitudinal cross-sectional view taken by section line "32-32";

[0065] Figure 33 for Figure 1 An enlarged perspective view of another construction of the distal end portion of the end effector assembly, with the outer axis shown in dashed lines;

[0066] Figure 34 To cross Figure 33The longitudinal cross-sectional view taken by section line "34-34"; and

[0067] Figure 35 To cross Figure 34 The transverse cross-sectional view taken by the section line "35-35". Detailed Implementation

[0068] Overall reference Figure 1 and Figure 23 The tissue resection instrument 10 provided according to this disclosure and configured for tissue resection includes an end effector assembly 100 and a handheld assembly 200. The tissue resection instrument 10 is adapted to be connected via a cable 300 to a control unit (not shown) to provide power and control functions to the tissue resection instrument 10, but the tissue resection instrument 10 may alternatively or additionally include a power source (e.g., a battery) and / or a control unit disposed within the handheld assembly 200. The tissue resection instrument 10 is further adapted to be connected via an outflow conduit (not shown) connected to an outflow port 400 to a fluid management system (not shown) for applying suction through the tissue resection instrument 10 to remove fluid, tissue, and debris from the surgical site. The control unit and the fluid management system may be integrated with each other, coupled to each other, or separate from each other.

[0069] The tissue resection instrument 10 can be configured as a single-use device, which is discarded or sent to the manufacturer for reprocessing after use; a reusable device, which can be cleaned and / or sterilized for reuse by the end user; or a partially single-use, partially reusable device. Regarding the partially single-use, partially reusable configuration, the handpiece assembly 200 can be configured as a cleanable / sterilizable, reusable component, while the end effector assembly 100 can be configured as a single-use, disposable / reprocessable component. In any of the above configurations, the end effector assembly 100 is configured to releasably engage the handpiece assembly 200 to facilitate the disposal / reprocessing of any single-use component and the cleaning and / or sterilization of any reusable component. Furthermore, the releasable engagement of the end effector assembly 100 with the handpiece assembly 200 allows for the interchangeable use of different end effector assemblies, such as those of different lengths, constructions, etc., with the handpiece assembly 200.

[0070] Continue to refer to Figure 1 The end effector assembly 100 includes an outer shaft 120, a drive line 140, a hub assembly 160, and a drive assembly 180. Figure 5 ) and RFID chip 190 ( Figure 5 Also refer to Figure 2-5 , Figure 8 and Figure 9The outer shaft 120 includes a proximal end portion 122 and a distal end portion 124, the distal end portion defining a at least partially closed distal end 126 and a transverse window 128 disposed adjacent to the at least partially closed distal end 126. The window 128 provides a transverse passage through its sidewalls to the interior of the outer shaft 120 and may be surrounded by a cutting edge 129a extending around at least a portion of the outer periphery of the window 128 to facilitate cutting tissue through the window 128 and into the outer shaft 120. The cutting edge 129a may define a serrated configuration comprising a plurality of cutting teeth 129b extending along the longitudinal side of the cutting window 128, or may define any other suitable configuration. In an embodiment, the cutting teeth 129b are constructed to be arcuate to conform to the tubular shape of the outer shaft 120.

[0071] The outer shaft 120 may be formed as a single sheet of material or may be formed from multiple sheets formed separately and subsequently joined together. For example, the outer shaft 120 may include an elongated cylindrical body portion 121a joined together by laser welding or any other suitable method and a distal tip portion 121b (which includes at least a partially closed distal end 126, a window 128, and a cut edge 129a). The outer shaft 120 may be formed of stainless steel or other suitable materials. In one embodiment, the outer shaft 120 may define an outer diameter equal to or less than about 0.085 inches; in other embodiments, it may define an outer diameter equal to or less than about 0.075 inches, and in still other embodiments, it may define an outer diameter equal to or less than about 0.065 inches. In one embodiment, the outer shaft 120 may define an inner diameter equal to or less than about 0.070 inches; in other embodiments, it may define an inner diameter equal to or less than about 0.060 inches, and in still other embodiments, it may define an inner diameter equal to or less than about 0.050 inches. As used herein, “about” takes into account tolerances and variations generally accepted in the art, including but not limited to material, manufacturing, environmental, usage, and measurement tolerances.

[0072] refer to Figure 1-7 The drive line 140 is rotatably mounted within the outer shaft 120 and includes the body 142. Figure 7 The proximal end portion 143a of the body 142 of the drive line 140 is bent to define a finger 143b, as detailed below, which facilitates engagement of the proximal end portion 143a of the drive line 140 within the distal driver 184 of the drive assembly 180, but also encompasses other engagement configurations. The distal end portion 144 of the drive line 140 is at least partially received within and engages with the distal cutting tip 150.

[0073] refer to Figure 6 and Figure 7The body 142 of the drive line 140 defines a cylindrical structure with a generally circular cross-section. In one embodiment, its outer diameter is equal to or less than about 0.045 inches; in other embodiments, its outer diameter is equal to or less than about 0.035 inches; and in still other embodiments, its outer diameter is equal to or less than about 0.025 inches. Material is removed from the distal end portion 144 of the drive line 140 such that the distal end portion 144 defines a semi-circular cross-sectional structure with a semi-cylindrical (semi-circular cross-section) bottom surface 145a and a planar upper surface 145b, rather than defining a circular cross-sectional structure. A transition section 146a, defining an angled transition surface 146b, is disposed between the body 142 and the distal end portion 144 of the drive line 140 to define a tapered transition between the rounded outer surface of the body 142 and the planar upper surface 145b of the distal end portion 144. The drive line 140 may be formed as a solid bar of material such as stainless steel, but may also cover other suitable materials and / or constructions.

[0074] Continue to refer to Figure 6 and Figure 7 As noted above, the distal end portion 144 of the drive line 140 is at least partially received within and engages with the distal cutting tip 150. The distal cutting tip 150 includes a semi-cylindrical body 152 defining a semi-cylindrical lumen 154. The distal cutting tip 150 may be formed of any suitable material (e.g., stainless steel) and may be machined or otherwise formed. The semi-cylindrical body 152 defines a semi-cylindrical bottom surface 155a, a planar upper surface 155b, an open proximal end 155c, and a at least partially closed distal end 155d. The planar upper surface 155b is defined by first and second sidewalls 156 spaced apart from each other to define an elongated opening 157, thereby providing access along the length of the semi-cylindrical lumen 154. The open proximal end 155c also provides access to the semi-cylindrical lumen 154.

[0075] The first and second sidewalls 156 may define a plurality of cutting teeth 158, which project from the planar upper surface 155b (and / or define valleys recessed therebetween) and extend along portions of the length of the first and second sidewalls 156. (Temporary reference) Figure 10 Cutting teeth 158 may complement cutting teeth 129b such that, in one orientation of the cutting tip 150 within the outer shaft 120, the surfaces defined by cutting teeth 158 and 129b are perfectly aligned with each other, for example, resembling a set of teeth. In an embodiment, cutting teeth 158, like cutting teeth 129b, are constructed to be arcuate to conform to the tubular shape of the outer shaft 120 (wherein the radius defined by cutting teeth 158 is smaller than the radius defined by cutting teeth 129b, because cutting teeth 158 are positioned radially inward of cutting teeth 129b).

[0076] Back Figure 6 and Figure 7 In one embodiment, the cutting tip 150 may be defined (e.g., the outer diameter of the semi-cylindrical body 152) in one embodiment equal to or less than about 0.070 inches; in other embodiments, it may be defined equal to or less than about 0.060 inches, and in still other embodiments, it may be defined equal to or less than about 0.050 inches. In one embodiment, the inner diameter of the cutting tip 150 (e.g., the inner diameter of the semi-cylindrical lumen 154) may be equal to or less than about 0.055 inches; in other embodiments, it is equal to or less than about 0.045 inches, and in still other embodiments, it is equal to or less than about 0.035 inches. Also refer to... Figure 10-12 In one embodiment, the annular gap defined between the outer diameter of the cutting tip 150 and the inner diameter of the outer shaft 120 may be from about 0.001 inches to about 0.006 inches; and in other embodiments, it may be from about 0.003 inches to about 0.004 inches.

[0077] Refer again Figure 6 and Figure 7 As noted above, the distal end portion 144 of the drive line 140 is at least partially received within and engages with the distal cutting tip 150. More specifically, the distal end portion 144 of the drive line 140 is received within a semi-cylindrical cavity 154 such that the outer semi-cylindrical bottom surface 145a of the distal end portion 144 of the drive line 140 complementarily engages with the semi-cylindrical inner surface of the cutting tip 150 defining the semi-cylindrical bottom of the semi-cylindrical cavity 154. In this position, the planar upper surface 145b of the distal end portion 144 of the drive line 140 may be coplanar with the upper surface 155b of the cutting tip 150 (defined by the sidewall 156). To secure the distal end portion 144 of the drive line 140 within the distal cutting tip 150 in this location, the adjacent edges of the planar upper surfaces 145b and 155b (defined by the sidewall 156) may be welded (e.g., by laser welding) or otherwise attached to each other on both sides. The attachment (e.g., welding) location may be close to the cutting teeth 129b, 158 and / or any other suitable location.

[0078] refer to Figure 10-12 The drive line 140 is configured to rotate or oscillate within and relative to the outer shaft 120, thereby causing the distal cutting tip 150 to rotate or oscillate relative to the window 128. More precisely, the inner shaft 140 is configured in the first open position ( Figure 10 ), partially closed second position ( Figure 11 ) and the third position of closure ( Figure 12 Rotation or oscillation between ) . In the first position, such as Figure 10As shown, the cutting teeth 129b and 158 are aligned with each other, and the elongated opening 157 is aligned with the window 128 to achieve maximum fluid communication between them. In the second position, as... Figure 11 As shown, the cutting teeth 129b and 158 are not aligned with each other (with only the tooth 158 on one side of the distal cutting tip 150 exposed), and the elongated opening 157 is not aligned with the window 128 to achieve only partial fluid communication between them. In the third position, as Figure 12 As shown, the cutting teeth 129b and 158 are offset relative to each other by approximately 180 degrees or in any other suitable position, such that the cutting tooth 158 is not exposed. Similarly, the elongated opening 157 and window 128 are offset relative to each other by approximately 180 degrees or in any other suitable position, such that fluid communication between them is substantially prevented. Regarding the rotational embodiment, the drive line 140 can rotate in a single direction from a first position to a second position, then to a third position, and then back to the first position (and can rotate continuously to repeat the same steps). Regarding the oscillating embodiment, the drive line 140 can rotate in a first direction from a first position to a second position, then to a third position, and then in the opposite second direction from the third position to the second position, and back to the first position (and can return in the same manner along the first direction, or can continue along the second direction to the third position before returning to the first position and repeat the same steps). Other oscillation modes and / or combinations of rotation and oscillation are also covered (e.g., where multiple rotations are performed before switching directions).

[0079] Turning Figure 10 and Figure 13-15 In an embodiment, either or both of the proximal surface 128a and distal surface 128b of the outer axis 120 defining the longitudinal boundary of window 128 may be defined with respect to the plane “P2” (in Figure 13 A plane "P1" (vertically oriented) is arranged at an angle "α", and the plane "P2" extends perpendicularly to the longitudinal axis of the outer axis 120. The plane "P1", defined by the proximal surface 128a and / or the distal surface 128b, may be longitudinally inclined away from the window 128 (e.g., where the proximal surface 128a is inclined proximally away from the window 128 in a radially outward direction and / or the distal surface 128b is inclined distally away from the window 128 in a radially outward direction). In embodiments, the angle "α" may be from about 25 degrees to about 55 degrees; in other embodiments, it may be from about 30 degrees to about 50 degrees; and in other embodiments, it may be from about 35 degrees to about 45 degrees. Alternatively, as... Figure 16 and Figure 17As shown, either or both of the proximal surface 128a and the distal surface 128b of the outer shaft 120 may define a plane extending perpendicularly to the longitudinal axis of the outer shaft 120. In any of the above embodiments, the distal cutting tip 150 may extend distally beyond the window 128 to confine the distal cutting tip 150 within the outer shaft 120. Alternatively or additionally, one or more of the nearest-side cutting teeth 158 of the distal cutting tip 150 may be at least partially positioned proximal to the window 128.

[0080] exist Figure 10 and Figure 13-15 In this embodiment, the distal end 126 of the outer shaft 120 is partially closed because the distal end 126 does not extend approximately the entire 180 degrees, but rather extends 180 degrees minus "α" degrees. Figure 16 and Figure 17 In one embodiment, on the other hand, the distal end 126 of the outer shaft 120 is completely closed because it extends about 180 degrees (e.g., where “α” equals about 0 degrees).

[0081] Turning Figure 18 In this embodiment, the outer shaft 1120 and the distal cutting tip 1150 may each define generally planar cutting edges 1129 and 1158, respectively, rather than providing teeth. In such embodiments, the distal ends 1126 and 1155d of the outer shaft 1120 and the distal cutting tip 1150 may each be partially closed and include corresponding U-shaped openings 1121 and 1151 defined therein. The cutting edges 1129 and 1158 may extend around the U-shaped openings 1121 and 1151, or the U-shaped openings 1121 and 1151 may be defined by a blunt surface.

[0082] like Figure 19 As shown, in other embodiments, one of the outer shaft 2120 and the distal cutting tip 2150, for example, the distal cutting tip 2150 may define a generally planar cutting edge 2158, while the other of the outer shaft 2120 and the distal cutting tip 2150, for example, the outer shaft 2120, defines a tooth 2129, rather than both containing a tooth. Reverse configurations are also covered.

[0083] refer to Figure 1-5 As noted above, the end effector assembly 100 includes an outer shaft 120, a drive line 140, a hub assembly 160, and a drive assembly 180. The end effector assembly 100 further includes an RFID chip 190, which is located between the retainer cover 170 of the hub assembly 160 and the proximal extension 164 of the hub housing 161 of the hub assembly 160, as detailed below.

[0084] Hub assembly 160 includes hub housing 161 having a distal body portion 162 and a proximal extension portion 164 configured to engage with each other, for example, by snap-fit ​​or other suitable engagement methods. Additional provisional references Figure 23 When the end effector assembly 100 is engaged with the handheld assembly 200, a proximal extension 164 of the hub housing 161 extends into the handheld assembly 200, while a distal body portion 162 substantially abuts the handheld assembly 200 and extends distally from it. The proximal extension 164 of the hub housing 161 further defines an outflow opening 165 through its sidewall, the outflow opening being configured to fluidly communicate with an inner bore (not shown) of the handle housing 210 of the handheld assembly 200 when the end effector assembly 100 is engaged therewith.

[0085] return Figure 1-5 and Figure 9 The distal body portion 162 of the hub housing 161 is fixedly disposed around the proximal end portion 122 of the outer shaft 120, wherein the outer shaft 120 extends distally from the proximal end portion. As mentioned above, the drive line 140 extends through the outer shaft 120 and proximally through the distal body portion 162 of the hub housing 161 into the proximal extension portion 164 of the hub housing 161, wherein the drive assembly 180 is operatively coupled to the finger 143b of the proximal end portion 143a of the body 142 of the drive line 140.

[0086] Hub assembly 160 further includes an O-ring 166 configured to engage on the distal side of the outflow opening 165 around the proximal extension 164 of the hub housing 161 (see [link]). Figure 20 O-ring 166 is configured to establish a liquid-tight seal against the interior of handle housing 210 of handgrip assembly 200 when engaged with end effector assembly 100 (see [link]). Figure 23 This is to prevent the fluid from traveling to the distal side after exiting the outflow opening 165.

[0087] The hub assembly 160 also includes a housing 168 configured to be positioned around and engaged with the distal body portion 162 of the hub housing 161, for example by snap-fit ​​engagement or by any other suitable means. Cantilever engagement fingers 169 extend proximally from the housing 168 of the hub housing 161 and proximally from the distal body portion 162 of the hub housing 161 when the housing 168 is engaged around it. The engagement fingers 169 are configured to engage within corresponding holes (not shown) defined within the handle housing 210 of the handgrip assembly 200 (see [link to handgrip assembly 200]). Figure 23 ), so that the end effector assembly 100 and the handheld assembly 200 ( Figure 23 It can be releasably engaged.

[0088] Continue to refer to Figure 1-5The retainer cover 170 of the hub assembly 160 is configured to snap on or otherwise engage with the proximal end portion of the proximal extension 164. The retainer cover 170 defines a longitudinal lumen 174 extending through the retainer cover 170. The retainer cover 170 further defines a pocket-shaped portion 178 configured to receive an RFID chip 190 therein. When the retainer cover 170 is engaged, for example, by snapping on, with the proximal extension 164, the open end of the pocket-shaped portion 178 is blocked by the proximal surface of the proximal extension 164, thereby capturing the RFID chip 190 therein.

[0089] Drive component 180 is configured to drive handheld component 200 (see Figure 23 The drive rotor (not shown) is operatively coupled to drive line 140 such that rotation of the drive rotor drives rotation and / or oscillation of drive line 140, thereby driving the distal cutting tip 150 to rotate and / or oscillate within and relative to the outer shaft 120. More specifically, drive assembly 180 includes a proximal driver 182, a distal driver 184, and a bias spring 186, such as a helical compression spring. Additionally, drive assembly 180 may include a gear (not shown) configured relative to the handheld assembly 200 (…). Figure 23 The input rotation received by the drive rotor is used to amplify or reduce the output rotation of the drive line 140.

[0090] refer to Figure 7 The distal actuator 184 of the drive assembly 180 includes a proximal body portion 185a, a distal body portion 185b, and a collar 185c disposed between the proximal body portion 185a and the distal body portion 185b, respectively. A seal 189 is circumferentially engaged around the collar 185c. The seal 189 is configured to form a liquid-tight seal over the annular gap between the distal actuator 184 and the distal body portion 162 of the hub housing 161 to prevent fluid within the annular gap from flowing proximally out of the seal 189 (see [link to documentation]). Figure 20 The distal dryer 184 further includes a lumen 185d extending therethrough. The proximal body portion 185a of the distal actuator 184 further includes a proximal leg 185e extending therefrom proximally. At least a portion of the proximal leg 185e defines a non-circular cross-sectional configuration, such as a semi-circular, rectangular, or other polygonal configuration. Furthermore, the lumen 185d is open at the proximal leg 185e, for example, the proximal leg 185e defines an open portion communicating with the lumen 185d.

[0091] Also refer to Figure 21The distal body portion 185b of the distal actuator 184 of the drive assembly 180 is configured to receive and engage a finger 143b of the proximal end portion 143a of the body 142 of the drive line 140. More specifically, the distal body portion 185b defines a longitudinally extending slot 185f communicating with a lateral slot 185g. The lateral slot 185g is configured to receive the finger 143b, while the longitudinally extending slot 185f is configured to receive a portion of the body 142 of the drive line 140 extending distally from the finger 143b. The finger 143b may be positioned approximately at a right angle or at any other suitable angle to the body 142, and thus the lateral slot 185g may be positioned approximately at a right angle or at any other suitable angle to the longitudinally extending slot 185f. This right-angle engagement facilitates torque transmission and provides axial fixation between the distal actuator 184 and the drive line 140. Furthermore, an adhesive (e.g., epoxy resin) disposed within the lateral slot 185g and / or the longitudinally extending slot 185f (and / or on the fingers 143b and / or the body 142) can be used to facilitate engagement between the distal actuator 184 and the drive line 140. Alternatively, in addition to the lateral finger (and adhesive) engagement detailed above, in embodiments, the distal actuator 184 is overmolded around the proximal portion 143a of the body 142 of the drive line 140 to secure the distal actuator 184 and the drive line 140 relative to each other.

[0092] like Figure 22 As shown, as an alternative to direct engagement of the drive line 140 with the distal driver 184, a connector 3143 can be provided to engage the drive line 140 with the distal driver 184. The drive line 140 can be connected to the connector 3143 by snap-fit ​​engagement, adhesive (with or without lateral finger engagement as detailed above), press-fit engagement, thermal riveting, combinations thereof, or any other suitable method. The connector 3143 can be connected to the distal driver 184 by spin welding, overmolding, thermal riveting, combinations thereof, or any other suitable method. The connector 3143 can be formed of metal such as stainless steel, plastic, or may contain both plastic and metal portions.

[0093] refer to Figure 20 The distal actuator 184 defines a flow path through it. More specifically, the distal body portion 185b of the distal actuator 184 defines opposing lateral openings 185h on its sides that communicate with the lumen 185d of the distal actuator 184. In this way, through window 128 ( Figure 10-12 The fluid, tissue, and debris drawn into the distal body portion 162 of the hub housing 161 via the outer shaft 120 (around the drive line 140) are further drawn into the lumen 185d through the lateral opening 185h.

[0094] refer to Figure 4 , Figure 5 , Figure 20 and Figure 21 The proximal actuator 182 of the drive assembly 180 includes a proximal body portion 183a and a distal body portion 183b. The proximal body portion 183a includes an outer ring 183c arranged annularly around it. The proximal body portion 183a further includes a cavity 183d facing proximally, at least a portion of which has a non-circular cross-sectional configuration, such as an octagonal star or other polygonal configuration, which is configured to at least partially receive the handheld assembly 200 in a fixed rotational orientation. Figure 23 The drive rotor. The distal body portion 183b defines a distally facing cavity 183e, at least a portion of which has a non-circular cross-sectional configuration, such as a semi-circular, rectangular, or other polygonal configuration. A longitudinally extending slot 183f defines a slot extending through the sidewall of the distal body portion 183b. Figure 21 The distal cavity 183e of the distal body portion 183b of the proximal actuator 182 is connected to the distal cavity 183e. The distal cavity 183e of the proximal actuator 182 is configured to slidably accommodate the proximal foot 185e of the distal actuator 184 in a fixed rotational orientation due to its non-circular and at least partially complementary construction.

[0095] like Figure 20 and Figure 21 As shown, a longitudinally extending slot 183f of the proximal actuator 182 is arranged in fluid communication with a lumen 185d of the distal actuator 184, such that fluid, tissue, and debris can be drawn from the lumen 18d through the longitudinally extending slot 183f and through an outflow opening 165 of the proximal extension 164 of the hub housing 161 in at least some rotational orientations relative to the proximal actuator 182 and the distal actuator 184, respectively. Fluid, tissue, and debris drawn through the outflow opening 165 of the proximal extension 164 of the hub housing 161 can be further drawn through a defined passage through the handheld assembly 200. Figure 23 The outflow path of the handle housing 210, and finally through the outflow port 400. Figure 23The instrument 10 and the outflow conduit (not shown) lead to a collection container (not shown). As understood, aspiration can also be provided via the outflow path defined above. More specifically, the outflow conduit (not shown) is configured to connect to an outflow port 400, thereby connecting the outflow port 400 to a fluid management system (not shown). The fluid management system includes a vacuum source to establish aspiration through the tissue resection instrument 10 and the outflow conduit to facilitate the removal of fluid, tissue, and debris from the surgical site, and may also include a collection reservoir, such as a collection canister, for collecting the removed fluid, tissue, and debris. As an alternative to or supplement to the vacuum source establishing aspiration through the tissue resection instrument 10 and the outflow conduit, a vacuum passing through the surgical site can be generated by the pressure difference between the surgical site and the outflow path.

[0096] Refer again Figure 4 , Figure 5 , Figure 20 and Figure 21 A bias spring 186 is disposed around the proximal body portion 185a of the distal actuator 184 and includes a distal end of a collar 185c adjacent to the distal actuator 184. The bias spring 186 includes a proximal end configured to be adjacent to the distal end of the distal body portion 183b of the distal actuator 182. In this way, the bias spring 186 biases the proximal actuator 182 proximally relative to the distal actuator 184. Complementary features on the proximal actuator 182 and the retainer cover 170 can engage in this more proximal position of the proximal actuator 182 to rotatably lock the proximal actuator 182 and the distal actuator 184 relative to the retainer cover 170 and the hub housing 161, and thus rotatably fix the drive cable 140 relative to the outer shaft 120 in this position. When the end effector assembly 100 is coupled to the handheld assembly 200 ( Figure 23 When engaged, for example due to their at least partially complementary construction, the drive rotor (not shown, or other parts) of the handheld assembly 200 is housed within a proximal-facing cavity 183d of the proximal body portion 183a of the proximal actuator 182 in its fixed rotational orientation. As the actuator rotor is inserted into the proximal-facing cavity 183d and reaches its bottom, further insertion of the end effector assembly 100 overcomes the bias of the bias spring 186, pushing the proximal actuator 182 through and distally relative to the retainer cover 170, thereby displacing the proximal actuator 182 distally relative to the retainer cover 170, thus displacing the complementary features, and thereby rotatably unlocking the proximal actuator 182 and the distal actuator 184 from the retainer cover 170 and the hub housing 161. Thus, when the end effector assembly 100 is engaged with the handheld assembly 200, the drive line 140 is unlocked from the outer shaft 120 and is permitted to rotate relative to said outer shaft.

[0097] refer to Figure 21 and Figure 23As detailed above, when the end effector assembly 100 is engaged with the handheld assembly 200, the RFID chip 190 of the end effector assembly 100 is positioned vertically aligned with the RFID transceiver (not shown) of the handheld assembly 200, so that the RFID transceiver can, for example, read data from / write data to the RFID chip 190 via cable 300 and / or transmit data read from / written to the control unit.

[0098] The data stored on the RFID chip 190 of the end effector assembly 100 may include: item number, such as SKU number; manufacturing date; place of manufacture, such as location code; serial number; usage count (which can be updated by writing data from the RFID transceiver 290 to the RFID chip 190); start / initial position of the drive line 140; rotation type (rotation and oscillation); RPM setting (default, high, medium, low); maximum RPM; pressure setting information; vacuum setting information; outflow setting information; calibration information; and / or encryption key. Additional or alternative data may also be included.

[0099] General reference Figure 1-5 , Figure 10-12 , Figure 20 , Figure 21 and Figure 23 As detailed above, the end effector assembly 100 engages with the handheld assembly 200, and the tissue resection instrument 10 is ready for use. In use, the motor (not shown) of the handheld assembly 200 is activated to drive the rotation of the drive rotor. When the motor is activated, suction is established via the tissue resection instrument 10, for example, by activating a vacuum source in the fluid management system, whether there is a preemptive or delayed start relative to the motor, or independently of motor activation.

[0100] The motor drives the rotation of the drive rotor in a rotating or oscillating manner. The drive rotor then drives the proximal driver 182 to rotate, which in turn drives the distal driver 184 to rotate, thereby causing the drive line 140 and thus the distal cutting tip 150 to rotate or oscillate relative to the outer shaft 120. The rotation or oscillation of the distal cutting tip 150 relative to the outer shaft 120, and the suction applied by the outer shaft 120, allow tissue, along with fluid and debris, to be drawn through the cutting window 128, cut by the distal cutting tip 150 and / or cutting edge 129a, and drawn proximally through the outer shaft 120 (around the drive line 140), the drive assembly 180, through the output opening 165 of the proximal extension 164 of the hub housing 161, and through the outflow path of the handheld assembly 200 to reach the outflow port 400 for output to the collection and storage tank of the fluid management system.

[0101] refer to Figure 23As an alternative to the handheld assembly 200 configured for manual grasping and manipulation during use, the tissue resection instrument 10 may alternatively be configured for use with a robotic surgical system, wherein the handle housing 210 is configured to engage the robotic arm of the robotic surgical system. The robotic surgical system may employ various robotic elements to assist the surgeon and allow for remote (or partially remote) operation. More specifically, for this purpose, various robotic arms, gears, cams, pulleys, electric motors, and mechanical motors may be employed, and these may be designed with the robotic surgical system to assist the surgeon during the procedure or treatment. The robotic surgical system may include remotely steerable systems, automated flexible surgical systems, remote flexible surgical systems, remote articulated surgical systems, wireless surgical systems, modularly or selectively configured remotely operated surgical systems, etc.

[0102] Robotic surgical systems can be used with one or more consoles located next to the operating room or at a remote location. In this configuration, a team of surgeons or nurses can prepare the patient for surgery and construct one or more surgical instruments as disclosed herein for the robotic surgical system, while another surgeon (or a group of surgeons) remotely controls the surgical instruments via the robotic surgical system. As can be understood, a highly skilled surgeon can perform multiple procedures in multiple locations without leaving his / her remote console, which is economically advantageous and beneficial to the patient or a group of patients.

[0103] The robotic arms of a robotic surgical system are typically coupled to a pair of master handles via a controller. The surgeon can move the handles to produce corresponding movements at the working ends of any type of surgical instrument (e.g., end effectors, grippers, scalpels, scissors, cameras, fluid delivery devices, etc.), complementing the use of the tissue resection apparatus described herein. The movement of the master handles can be scaled so that the corresponding movement of the working ends differs from, is less than, or is greater than the movement performed by the surgeon's operating hand. The scaling factor or gear ratio can be adjustable, allowing the operator to control the resolution of the working ends of the surgical instruments.

[0104] Turning Figure 24-26This illustrates another configuration of the distal end portion 3144 of the drive line 3140, the distal cutting tip 3150, and the junction therebetween. Unless otherwise specified below, the distal end portion 3144 of the drive line 3140, the distal cutting tip 3150, and the junction therebetween can be similar to any of the aspects detailed above. The distal end portion 3144 of the drive line 3140 has material removed therefrom, such that the distal end portion 3144 defines a semi-cylindrical (semi-circular cross-section) bottom surface 3145a and a planar upper surface 3145b, rather than defining a circular outer perimeter. A transition section 3146a defining a curved transition surface 3146b is disposed between the body 3142 of the drive line 3140 and the distal end portion 3144 of the drive line 3140, to define a smooth transition between the rounded outer surface of the body 3142 and the planar upper surface 3145b of the distal end portion 3144.

[0105] The distal end portion 3144 of the drive line 3140 further includes a semi-cylindrical cutout 3145c defined therein, the semi-cylindrical cutout being open to both the distal end of the distal end portion 3144 of the drive line 3140 and the planar upper surface 3145b, such that the planar upper surface 3145b is divided into surface portions on both sides of the semi-cylindrical cutout 3145c. The semi-cylindrical cutout 3145c defines a generally constant diameter along the distal end portion 3144 and further includes a transition portion that gradually tapers in a direction from distal to proximal (along a curved bottom surface) to define a smooth transition from the semi-cylindrical cutout 3145c to the exterior of the body 3142 of the drive line 3140.

[0106] The distal end portion 3144 of the drive line 3140 is at least partially received within and engages with the distal cutting tip 3150. More specifically, the distal end portion 3144 of the drive line 3140 is received within the proximal portion of the semi-cylindrical cavity 3154 such that the outer semi-cylindrical bottom surface 3145a of the distal end portion 3144 of the drive line 3140 complementarily engages with the semi-cylindrical inner surface of the cutting tip 3150 defining the semi-cylindrical bottom of the semi-cylindrical cavity 3154. Furthermore, at least a portion of the distal end surface of the distal end portion 3144 of the drive line 3140, such as the inclined surface 3148, is proximal to the cutting teeth 3158 of the distal cutting tip 3150 and / or the distal end surface of the distal end portion 3144 of the drive line 3140 does not extend distally beyond the nearest side teeth 3158 on either side of the distal cutting tip 3150. The two-part planar upper surface 3145b of the distal end portion 3144 of the drive line 3140 may be coplanar with the upper surface 3155 of the cutting tip 3150 (defined by the sidewall 3156).

[0107] The distal end portion 3144 of the drive line 3140 is positioned more proximally relative to the cutting tip 3150, maximizing the open volume within the portion of the semi-cylindrical lumen 3154 beneath the cutting teeth 3158 to increase the volume of tissue, fluid, and debris that can be contained therein. A semi-cylindrical incision 3145c extending proximally from the portion of the semi-cylindrical lumen 3154 beneath the cutting teeth 3158 provides additional open volume, allowing tissue, fluid, and debris to flow proximally through the outer shaft 3120 near the distal end portion 3144 of the drive line 3140. Furthermore, the distal end of the distal end portion 3144 of the drive line 3140 may define an inclined surface 3148 to facilitate proximal inflow of tissue, fluid, and debris from the semi-cylindrical lumen 3154 into the vicinity of the semi-cylindrical incision 3145c and / or the distal end portion 3144 of the drive line 3140.

[0108] refer to Figure 27-29 This illustrates another configuration of the distal end portion 4144 of drive line 4140, the distal cutting tip 4150, and the engagement therebetween. Unless otherwise specified below, the distal end portion 4144 of drive line 4140, the distal cutting tip 4150, and the engagement therebetween may resemble any of the aspects detailed above. The distal end portion 4144 of drive line 4140 is similar to the distal end portion 3144 of drive line 3140 (…). Figure 24-26 The difference lies in that the distal end portion 4144 does not include a semi-cylindrical cut. The distal end portion 4144 of the drive line 4140 is housed within the proximal portion of the semi-cylindrical cavity 4154 of the cutting tip 4150, such that the outer semi-cylindrical bottom surface 4145 of the distal end portion 4144 of the drive line 4140 complementarily engages with the semi-cylindrical inner surface of the cutting tip 4150 defining the semi-cylindrical bottom of the semi-cylindrical cavity 4154. Furthermore, at least a portion of the distal end surface of the distal end portion 4144 of the drive line 4140, such as the inclined surface 4148, is proximal to the cutting teeth 4158 of the distal cutting tip 4150 and / or the distal end surface of the distal end portion 4144 of the drive line 4140 does not extend distally beyond the nearest side teeth 4158 on either side of the distal cutting tip 4150.

[0109] refer to Figure 30-32 This illustrates another configuration of the distal end portion 5144 of the drive line 5140, the distal cutting tip 5150, and the engagement therebetween. Unless otherwise specified below, the distal end portion 5144 of the drive line 5140, the distal cutting tip 5150, and the engagement therebetween may resemble any of the aspects detailed above.

[0110] The distal cutting tip 5150 includes a semi-cylindrical body 5152 defining a semi-cylindrical lumen 5154. The semi-cylindrical body 5152 defines a semi-cylindrical bottom surface 5155a, a planar upper surface 5155b defined by first and second sidewalls 5156 of an elongated opening 5157 spaced apart from each other to define a passage providing access to the semi-cylindrical lumen 5154, an open proximal end 5155c, and a at least partially closed distal end 5155d. The distal cutting tip 5150 further defines a longitudinally extending slot 5159 through the semi-cylindrical bottom surface 5155a opposite to the elongated opening 5157. The slot 5159 has an open proximal end at the proximal end of the distal cutting tip 5150.

[0111] The distal end portion 5144 of the drive line 5140 is at least partially received within and engages with the distal cutting tip 5150. More specifically, the distal end portion 5144 of the drive line 5140 is received within a semi-cylindrical cavity 5154 such that at least a portion of the semi-cylindrical bottom surface 5145a of the distal end portion 5144 of the drive line 5140 extends into the slot 5159 of the distal cutting tip 5150. In this manner, the distal end portion 5144 of the drive line 5140 is allowed to be further positioned within the distal cutting tip 5150, such that the planar upper surface 5145b is recessed relative to the upper surface 5155b, rather than the planar upper surface 5145b of the distal end portion 5144 of the drive line 5140 being coplanar with the upper surface 5155b of the cutting tip 5150 (defined by the sidewall 5156). Therefore, the open volume within the semi-cylindrical lumen 5154 is increased, thereby increasing the volume of tissue, fluid, and debris that can be contained therein.

[0112] Turning Figure 33-35 This illustrates another configuration of the drive line 6140, the distal cutting tip 6150, and the junction therebetween. Unless otherwise specified below, the drive line 6140, the distal cutting tip 6150, and the junction therebetween may resemble any of the aspects detailed above.

[0113] The drive line 6140 does not include a distal end portion for material removal, but rather defines a cylindrical structure to its distal end. The outer diameter of the drive line 6140 is typically approximately (e.g., within 10%) the inner diameter of the semi-cylindrical lumen 6154 of the distal cutting tip 6150. The distal end of the drive line 6140 extends into or minimally extends into the semi-cylindrical lumen 6154 of the distal cutting tip 6150, and is engaged with the distal cutting tip 6150, for example, by welding (e.g., lap welding or butt welding) at a location proximal to the cutting teeth 6158 of the distal cutting tip 6150. More specifically, in one embodiment, the distal end of the drive wire 6140 extends into the semi-cylindrical cavity 6154 of the distal cutting tip 6150 by a distance not exceeding 20% ​​of the length of the distal cutting tip 6150; in other embodiments, this distance is not more than 17% of the length of the distal cutting tip 6150; and in still other embodiments, this distance is not more than 15% of the length of the distal cutting tip 6150. Therefore, the open volume within the semi-cylindrical cavity 6154 of the distal cutting tip 6150 is maximized.

[0114] While several embodiments of this disclosure have been shown in the drawings, it is not intended to limit this disclosure to these embodiments, as it is desired that this disclosure have the broad scope permitted by the art and the understanding of the specification. Therefore, the above description should not be construed as restrictive, but merely as embodiments of particular implementations. Other modifications within the scope and spirit of the appended claims will be conceived by those skilled in the art.

[0115] Although the foregoing disclosure has been described in detail by way of illustration and examples, it will be apparent for clarity or understanding that certain changes and modifications may be practiced within the scope of the appended claims.

Claims

1. An end effector assembly for a tissue resection device, the end effector assembly comprising: An outer shaft that defines a proximal end portion and a distal end portion, the distal end portion of the outer shaft defining a window therethrough; A drive line that extends through the outer shaft and includes a cylindrical body and a distal end portion defining a semi-cylindrical structure, the semi-cylindrical structure including a semi-cylindrical bottom surface and a planar top surface; as well as A distal cutting tip, disposed within the outer shaft and at least partially overlapping the window, defines a semi-cylindrical lumen defined by a semi-cylindrical bottom surface and an open top. The distal end portion of the drive wire is at least partially received within and engaged in the semi-cylindrical cavity of the distal cutting tip, wherein the semi-cylindrical bottom surface of the distal end portion of the drive wire substantially mates with the semi-cylindrical bottom surface of the distal cutting tip, and the drive wire is configured to drive the distal cutting tip to rotate or oscillate relative to the outer axis. The distal cutting tip includes a plurality of teeth extending along a portion of its length, the plurality of teeth comprising a first set of teeth disposed on a first side of the semi-cylindrical lumen and a second set of teeth disposed on an opposite second side of the semi-cylindrical lumen. The distal end of the distal end portion of the drive line does not extend distally beyond the first tooth of each of the first set of teeth and the second set of teeth.

2. The end effector assembly of claim 1, wherein the distal end of the distal end portion of the drive line is located proximal to the plurality of teeth.

3. The end effector assembly of claim 1, wherein the drive line includes a transition portion disposed between the cylindrical body and the distal end portion, the transition portion including a curved surface.

4. The end effector assembly of claim 3, wherein the distal end portion of the drive line includes a semi-cylindrical cutout, the semi-cylindrical cutout including a transition portion defined within the transition portion of the drive line, the transition portion of the semi-cylindrical cutout being defined by a curved bottom surface.

5. The end effector assembly of claim 1, wherein the distal end portion of the drive line includes a sloped distal surface.

6. The end effector assembly of claim 1, wherein the drive line includes a semi-cylindrical cut defined within a planar upper surface.

7. The end effector assembly of claim 1, wherein the planar top surface of the distal end portion of the drive line is recessed relative to the open top of the distal cutting tip.

8. The end effector assembly of claim 1, wherein the drive line extends distally into the distal cutting tip by a distance not exceeding 20% ​​of the length of the distal cutting tip.

9. The end effector assembly of claim 1, wherein the drive line extends distally into the distal cutting tip by a distance not exceeding 15% of the length of the distal cutting tip.

10. The end effector assembly of claim 1, wherein the drive line is joined to the distal cutting tip by welding.

11. A tissue resection device, comprising: Handheld items; as well as The end effector assembly according to any one of the preceding claims, wherein the end effector assembly is configured to releasably engage the handpiece.

12. The tissue resection device of claim 11, wherein the end effector assembly further comprises a hub assembly configured to releasably engage the handpiece, and wherein, When the end effector assembly is releasably engaged with the handpiece, the outer shaft is fixed relative to the handpiece and the drive line is operatively connected to the motor of the handpiece.

13. The tissue resection apparatus of claim 12, wherein the hub assembly includes an RFID chip configured to be read by an RFID reader of the handheld component to enable identification of the end effector assembly.

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