Tips and systems for skin treatment devices

Abstract

The present invention includes a tip configured to be secured to a distal end of a handpiece of a skin treatment system, comprising: a distal portion configured to contact skin and a proximal portion configured to be secured to the handpiece; a peripheral lip along the distal end, the peripheral lip defining an interior region; at least one fluid delivery opening located at or near a central location along within the interior region and configured to deliver a process fluid to the interior region during use; a plurality of waste openings within the interior region and configured to remove waste fluid and other debris from the interior region during use; and at least one protrusion extending distally along the interior region, the at least one protrusion creating a plurality of fluid flow channels along the interior region from the at least one fluid delivery opening to the waste opening during use.

Description

[0001] Related applications This application claims priority to U.S. Provisional Patent Application No. 63 / 444,872, filed February 10, 2023, the entire contents of which are incorporated herein by reference and form part of this application. Technical Field

[0002] This application relates generally to skin treatment, and more specifically to tips, devices, systems and methods for treating human skin. Background Technology

[0003] The desire is to abrade the outer layer or epidermis of the skin to smooth or blend scars, blemishes, or other skin conditions that may be caused by factors such as acne, sun exposure, and aging. Standard techniques for abrasion typically fall into two categories: dermabrasion and microdermabrasion. Both techniques remove a portion of the epidermis called the stratum corneum, which the body interprets as minor damage. The body then replaces the lost skin cells, forming a new outer layer of skin. Furthermore, although slight swelling and redness are associated with the procedure, the skin looks and feels smoother due to the new outer layer. Summary of the Invention

[0004] According to some embodiments, a tip of a distal end of a handheld component configured to be secured to a skin treatment system includes: a distal portion configured to contact the skin and a proximal portion configured to be secured to the handheld component; a peripheral lip along the distal end defining an inner region; at least one fluid delivery opening located at or near a central position along the inner region and configured to deliver treatment fluid to the inner region during use; a plurality of waste openings located within the inner region and configured to remove waste fluid and other debris from the inner region during use; and at least one protrusion extending distally along the inner region, the at least one protrusion creating a plurality of fluid flow channels along the inner region during use from the at least one fluid delivery opening to the waste openings; wherein the fluid flow channels include a first fluid flow channel that allows treatment fluid to move in a radially outward direction from the at least one fluid delivery opening to or near the peripheral lip; and wherein the fluid flow channels include at least a second fluid flow channel that allows treatment fluid to move in a radially inward direction from or near the peripheral lip to one of the waste openings, the radially inward direction being opposite to or substantially opposite to the radially outward direction.

[0005] According to some embodiments, the shape of the peripheral lip is circular. In some embodiments, the diameter or cross-sectional dimension of the distal portion of the tip is 30% to 70% greater than the diameter or cross-sectional dimension of the proximal portion of the tip. In some arrangements, the diameter or cross-sectional dimension of the distal portion of the tip is 40% to 60% greater than the diameter or cross-sectional dimension of the proximal portion of the tip. In one embodiment, the diameter or cross-sectional dimension of the distal portion of the tip is at least 20% greater than the diameter or cross-sectional dimension of the proximal portion of the tip.

[0006] According to some embodiments, the tip comprises at least two segments, wherein each of the at least two segments comprises at least one of the waste openings. In some embodiments, the tip comprises a total of four segments. In some arrangements, each of the segments is identical to the other segments.

[0007] According to some embodiments, the fluid flow channel comprises a third fluid flow channel that moves the treatment fluid in a radially outward direction after the treatment fluid passes through the at least second fluid flow channel. In some embodiments, all sides of each of the waste openings are surrounded by at least one protrusion.

[0008] According to some embodiments, the tip comprises one or more rigid or semi-rigid materials. In some arrangements, the tip comprises at least one plastic material. In some embodiments, the tip comprises at least one metal or alloy.

[0009] According to some embodiments, the tip is disposable. In some arrangements, the tip is reusable.

[0010] According to some embodiments, the tip is manufactured as a unitary or monolithic article.

[0011] According to some embodiments, a plane along the distal end face of the distal portion of the tip is angled relative to the longitudinal axis of the tip and relative to an axis perpendicular to the longitudinal axis. In some embodiments, the angle of the tip relative to the axis perpendicular to the longitudinal axis is 10 to 30 degrees.

[0012] According to some embodiments, the tip is configured for use on a torso of a subject.

[0013] According to some embodiments, a tip configured to be secured to a distal end of a handpiece of a skin treatment system includes a distal portion configured to contact skin and a proximal portion configured to be secured to the handpiece; a peripheral lip along the distal end, the peripheral lip defining an interior region; at least one fluid delivery opening located at or near a central location within the interior region and configured to deliver treatment fluid to the interior region during use; a plurality of waste openings located within the interior region and configured to remove waste fluid and other debris from the interior region during use; and at least one protrusion extending distally along the interior region, the at least one protrusion including at least two distinct protrusion portions; wherein the distinct protrusion portions create at least one fluid flow channel from the at least one fluid delivery opening to the peripheral lip or near the peripheral lip, the direction of fluid flow through the at least one fluid flow channel being radially outward; wherein each of the distinct protrusion portions includes an inlet along a radially outward section of the distinct protrusion portion; wherein the distinct protrusion portions are configured such that treatment fluid enters through the inlet in a direction opposite or substantially opposite to radially outward (e.g., a radially inward direction); and wherein the waste openings are located inside the distinct protrusion portions.

[0014] According to some embodiments, each of the distinct protrusion portions includes a triangular shape or a substantially triangular shape (e.g., with rounded corners). In other embodiments, the distinct protrusion portions include different shapes (e.g., rectangular, other polygonal, circular, elliptical, irregular, etc.). In some embodiments, the at least one protrusion includes two distinct protrusion portions. In one embodiment, the at least one protrusion includes four distinct protrusion portions.

[0015] According to some embodiments, a skin treatment system includes a handpiece and a tip secured along a distal end of the handpiece, wherein the tip includes a tip according to any of the tip embodiments disclosed herein.

[0016] According to some embodiments, a method for treating skin includes: delivering a treatment fluid to a tip of a handpiece, the handpiece including a body and a tip, wherein the tip is positioned at or near a distal end of the body, wherein the handpiece includes at least one fluid conduit configured to fluidly connect the tip to a fluid source when the tip is secured to the handpiece, wherein the tip includes at least one protrusion extending distally along an interior region defined by a peripheral lip, the at least one protrusion including at least two distinct protrusion portions, wherein the at least two distinct protrusion portions create at least one fluid flow channel from at least one fluid delivery opening to the peripheral lip or near the peripheral lip, a direction of fluid flow through the at least one fluid flow channel being radially outward; and distributing the treatment fluid along at least a portion of the tip using the at least one fluid flow channel; and collecting and removing waste fluids and other debris via a plurality of waste openings of the tip and a waste conduit of the handpiece, wherein the waste openings are configured to be in fluid communication with the waste conduit when the tip is secured to the handpiece.

[0017] According to some embodiments, the tip further includes at least one fluid delivery opening located at or near a central location within the interior region and configured to deliver the treatment fluid to the interior region during use.

[0018] According to some embodiments, the waste openings are located within the interior region and are configured to remove waste fluids and other debris from the interior region during use.

[0019] According to some embodiments, each of the distinct protrusion portions includes an inlet along a radially outward section of the distinct protrusion portion. In some embodiments, the distinct protrusion portions are configured such that the treatment fluid enters through the one or more inlets in a direction opposite or substantially opposite the radially outward direction.

[0020] According to some embodiments, the method further includes advancing the tip along a skin surface. In some embodiments, advancing the tip along the skin surface abrades the skin. BRIEF DESCRIPTION OF DRAWINGS

[0021] These and other features, aspects, and advantages of the present application will be described with reference to the drawings, which are intended to illustrate but not to limit the various concepts disclosed herein. It will be understood that the drawings are intended to be illustrative and may not be to scale.

[0022] FIG. 1A A perspective view of a handpiece configured for use in a skin treatment system is shown in accordance with one embodiment; FIG. 1B A side view of the handpiece is shown in FIG. 1A ; FIG. 2A andFIG. 2B different perspective views of one embodiment of a tip configured to be secured along a distal end of a skin treatment handpiece are shown; FIG. 2C and FIG. 2D top and bottom views of the tip of FIG. 2A and FIG. 2B FIG. 2E and FIG. 2F side views of the tip of FIG. 2A and FIG. 2B FIG. 2G and 2H front and back views of the tip of FIG. 2A and FIG. 2B FIG. 3 annotated view of the tip of FIG. 2A to FIG. 2H FIG. 4 cross-sectional view of the tip of FIG. 2A to FIG. 2H FIG. 5 perspective view of a tip according to another embodiment; and FIG. 6 perspective view of a tip according to another embodiment. DETAILED DESCRIPTION

[0023] While various embodiments disclosed herein have particular relevance to skin treatment (e.g., devices, systems, methods of use, etc.), features, advantages, and other characteristics disclosed herein can be applied directly or indirectly to other applications, such as medical devices, mechanical devices, and / or the like.

[0024] Several embodiments of the invention disclosed herein are particularly advantageous in that they include one, several, or all of the following benefits: provide enhanced delivery of treatment fluid to a subject’s skin; provide a skin treatment tip with a greater surface area / surface area that facilitates treatment of certain anatomical portions (e.g., a person’s back or torso, other larger areas, sites that are relatively boney, etc.); enable better (e.g., increased, enhanced, etc.) exfoliation / extracting and nourishing performance (e.g., using treatment fluid); create a more even distribution of serum and / or other treatment fluid / material to a larger coverage area for exfoliation and extraction in a faster manner; increase fluid flow speed along a distal or distal portion of the tip; and facilitate a user’s application of force to a skin surface (e.g., particularly a “boney” skin surface) and / or the like.

[0025] FIG. 1A and FIG. 1B ​​​​​One embodiment of a handpiece or handpiece device 10 configured for use in a skin treatment system is shown. In some embodiments, the handpiece 10 is part of a larger skin treatment system (e.g., a system including a tower or console (not shown)) (and / or can be used in conjunction with another device or system). Such a tower or console can include a manifold assembly for receiving one or more (e.g., 1, 2, 3, 4, 4 or more, etc.) bottles or other containers of treatment fluid to be used in a skin treatment procedure. The tower assembly can also include one or more waste tanks or other containers configured to receive waste fluid, exfoliated or otherwise removed skin tissue, and / or other waste products generated in a skin treatment procedure. In some arrangements, one or more of the bottles, tanks, or other containers designed and otherwise adapted to be secured to the tower assembly can be replaceable, interchangeable, and / or otherwise removable (e.g., for emptying, high-pressure sterilization or other types of cleaning, replacement, etc.).

[0026] In embodiments of a skin treatment system including a tower assembly or console, such a tower assembly or console can include (and / or can be configured to communicate or work with) one or more input and / or output devices (e.g., touchscreens or other monitors, keyboards, other controllers, etc.), housings or other external structures, tubing, one or more trays or other storage components, casters, wheels or other mobility members or components, internal components (e.g., processors, memory, power sources, sensors, tubing, valves and / or other hydraulic components, electrical wires and other electrical components, etc.), and / or the like. In some embodiments, the tower system or console includes a vacuum or suction source configured to be coupled to the handpiece 10.

[0027] The skin treatment system can be configured to allow a user (e.g., a cosmetologist, esthetician, dermatologist, etc.) to (1) connect the handpiece 10 to a manifold assembly as described above (e.g., using a “dummy” cartridge 34, a luer connector or other connector 30, a fluid conduit extending from the luer 30 to a manifold system of the tower assembly, etc.), and / or (2) insert a cartridge (e.g., a vial (not shown)) containing actual fluid or treatment material directly into the handpiece 10, e.g., the recess 36 of the handpiece assembly. These two options can be used interchangeably to perform a treatment procedure or regimen as needed or desired.

[0028] Regardless of whether a vacuum or suction source is included as part of the skin treatment system and / or various components thereof (e.g., a tower assembly, a handpiece, etc.) or provided separately from the skin treatment system, the handpiece 10 can include one or more vacuum or suction ports or connectors 40. As FIG. 1A and FIG. 1BAs shown, such a vacuum port or connector 40 can be located along the proximal end 14 of the handpiece 10.

[0029] According to some embodiments, once the handpiece 10 can be coupled to a vacuum source (e.g., via the vacuum port 40, a vacuum conduit or suction conduit (not shown), etc.), and if the vacuum source is activated, the vacuum source creates a suction force (e.g., a negative pressure relative to atmospheric or ambient pressure) along the distal end 12 of the handpiece 10. In some arrangements, such a suction or vacuum force along the tip or distal end of the handpiece can help to draw one or more treatment fluids to the distal end 12 (e.g., via a manifold, manifold assembly, block, fluid control member, collection chamber or member of the (e.g., tower or console (not shown)), via a vial or cartridge directly positioned within the handpiece 10, etc.). In some embodiments, the distal end 12 of the handpiece 10 is shaped, sized and otherwise configured to receive a tip, such as FIG. 2A to FIG. 2H the tip shown, any other tip disclosed herein, and / or equivalents or variations thereof.

[0030] With further reference to FIG. 1A and FIG. 1B the distal end 12 of the handpiece can include at least one fluid delivery port or opening 22 and / or at least one vacuum port or opening 24. In some embodiments, the fluid delivery port or opening 22 is configured to be placed in fluid communication with a fluid source (e.g., a manifold system, a block, a fluid control member, a collection chamber or member, other portions of a console, one or more bottles secured thereto, a vial or fluid container directly positioned in a recess or opening 36 of the handpiece 10, etc.). Such fluid communication can be facilitated by one or more conduits, channels or other passageways internal and / or external to the handpiece.

[0031] Likewise, in some embodiments, the vacuum port or opening 22 is configured to be placed in fluid communication with a vacuum or suction source (e.g., in a tower or console of a skin treatment system, in the handpiece 10, included in another portion or component of a skin treatment system, separate from a skin treatment system, etc.). Such fluid communication can be facilitated by one or more conduits, channels or other passageways internal or external to the handpiece.

[0032] As described in connection with one or more tip embodiments disclosed herein, the tip can be configured to form a seal (at least a partial seal and / or a temporary seal) with a skin surface being treated when the tip is positioned in a particular manner relative to that skin surface. For example, the tip can include a peripheral lip or other external member 132 (see, e.g., FIG. 2A), a peripheral lip or other external member 132 is configured to contact skin tissue during use of the handpiece. When the handpiece is coupled to a vacuum source and such vacuum source is activated, this lip or other peripheral member 132 can form at least a partial seal with the skin and help to create or generate a vacuum or suction within the interior region bounded by the lip or member. Accordingly, in accordance with some arrangements, the vacuum or suction along this interior region along the tip or distal end can help to draw fluid and / or other treatment material from one or more sources (e.g., one or more cartridges or other containers configured to be secured to the handpiece, one or more bottles or other containers in a device or system that is separate and distinct from the handpiece but hydraulically coupled to the handpiece, etc.) to the tip or distal end (e.g., using suction or vacuum alone, without the need to apply positive pressure on the fluid or other treatment material being transferred to the tip or distal end). Thus, in such arrangements, using the suction created along the distal end of the handpiece 10, treatment fluid and / or other material from a vial, bottle, other container, and / or other fluid source is "pulled," "sucked," or moved to or toward the handpiece 10 (e.g., to the distal end 12 of the handpiece, a tip secured thereto, etc.).

[0033] In other embodiments, treatment fluid and / or other material can be transferred from the manifold assembly to the handpiece assembly 10 by applying positive pressure within and / or along the main fluid conduit and / or a bottle or other container secured to the manifold, manifold assembly, block, fluid control member, collection chamber or member, other portion of the console, etc. This can be implemented in place of or in addition to generating suction along the handpiece assembly 10 (e.g., as discussed above). FIG. 3 A and FIG. 3 B are schematically depicted and discussed herein).

[0034] Fluid and / or other treatment material from two or more bottles or other containers secured to the manifold assembly (e.g., manifold assembly, manifold, block, fluid control member, collection chamber or member, etc.) can be delivered to the handpiece assembly 10 sequentially or simultaneously, as desired or required. As discussed, the fluid network of the system can include one or more valves, other flow control devices or members, flow meters, and / or the like to help regulate the flow of fluid and / or other material from the fluid source (e.g., manifold assembly or manifold, block, fluid control member, collection chamber or member, vial or cartridge, another container, etc.) to the tip 12 or distal end 14 of the handpiece.

[0035] According to some embodiments, the system is configured to continuously deliver treatment fluid from a fluid source (e.g., a vial or other container secured to the handpiece, one or more bottles coupled to a manifold, block, fluid control member, collection chamber or member, etc.). However, in other embodiments, the treatment fluid can be provided using a pulsed mode or non-continuous mode. In some arrangements, the pulsed mode can be created by selectively actuating one or more valves and / or other hydraulic features or components of the handpiece and / or any other portion of the skin treatment system.

[0036] According to some embodiments, the handpiece 10 includes a lever or other controller 50 for adjusting the flow of treatment fluid and / or material to the distal end 12 of the handpiece. A tip can be removably secured to the distal end 12 of the handpiece. Additional information regarding one or more embodiments of tips that can be secured to the distal end 12 of the handpiece 10 is provided below.

[0037] The tips and / or their equivalents shown and discussed herein can be configured to be secured to one or more other types of handpieces and / or other modalities (e.g., in addition to the handpieces shown herein FIG. 1A and FIG. 1B ). For example, the tips can be secured to larger or smaller handpieces, such as lymphatic handpieces, handpieces for body treatment or other large area treatment, and / or the like.

[0038] With continued reference to FIG. 1A and FIG. 1B , the cartridge 34 is configured to be removably positioned within the recess 36 of the handpiece 10, whether it is a cartridge that includes a fluid or other treatment material within an internal chamber, or a“dummy” cartridge 34 that places the handpiece in fluid communication with a manifold or other fluid source or network. In some embodiments, the recess 36 comprises an open recess that is accessible along the exterior of the handpiece assembly. In some arrangements, the recess 36 is readily accessible from the exterior of the handpiece assembly to allow a user to insert / remove the cartridge 34 within / from the recess 36 as needed or required without manipulating any portion of the handpiece 10 (e.g., without opening the interior of the handpiece, without taking any additional steps, etc.). In some configurations, the recess 36 is located along the proximal end of the handpiece 10 and faces in an opposite or substantially opposite direction from the distal end 12 of the handpiece 10 (and any tip secured along the distal end 12).

[0039] For any of the skin treatment system embodiments disclosed herein, the cartridge 34 can be configured to be selectively locked to and unlocked from the handpiece 10. In some arrangements, rotation, twisting, pushing, sliding, and / or other movement of the cartridge relative to the handpiece can be used to lock and unlock the cartridge 34 once the cartridge is secured to the handpiece. According to some embodiments, the cartridge 34 is configured to be locked to the body portion of the handpiece using one or more devices or methods, such as locking tabs, clasp rings, magnetic connectors, other fasteners, and / or the like.

[0040] As noted above, in some embodiments, FIG. 1A and FIG. 1B The“model” cartridge 34 can be replaced with a vial or cartridge of fluid and / or other treatment material. Such vials or other containers can include one or more chambers containing serum and / or other treatment fluids or materials. In such embodiments, when the tip or distal end is positioned along a target skin surface, the vacuum or suction created along the tip or distal end of the handpiece can help draw serum and / or other treatment fluids / materials stored within the vial or other container to the tip or distal end 12.

[0041] In some embodiments, both the“model” cartridge 34 in fluid communication with a manifold (e.g., of a tower or console system) and a vial or cartridge (e.g., a booster vial) that itself includes one or more serums or fluids can be used in a particular system and / or procedure. Thus, in some arrangements, a user can swap cartridges and / or other containers 34 as needed or required during and / or between treatment steps or procedures.

[0042] As noted above, the handpiece 10 can be used with one or more skin treatment tips that can be removably and / or replaceably positioned along the distal end of the handpiece. At least some embodiments of such tips 100 are shown and described herein. See, for example, but not limited to FIG. 2A to FIG. 2H , FIG. 3 and FIG. 4 . The tips can include any of the tips disclosed in U.S. Patent No. 8,048,089, filed as U.S. Patent Application No. 11,392,348 on March 29, 2006, and issued on November 1, 2011, the entirety of which is hereby incorporated by reference and made part of this specification. See, for example, FIG. 5 A through FIGS. 11E and the corresponding disclosure in U.S. Patent No. 8,048,089.

[0043] FIG. 2A to FIG. 2HDifferent views of one embodiment of a tip 100 configured to be removably secured to, along, or proximate to the distal end 12 of the handpiece 10 are shown. As illustrated, the tip 100 can include a proximal portion 110 and a distal portion 130. The proximal portion 100 of the tip 100 can be configured to be (e.g., removably) secured to the distal end 112 of the handpiece 10. For example, the illustrated tip 100 includes a cylindrical portion 114 along the proximal end 110 that is shaped and sized to be coupled to the distal end 112 of the handpiece 10. Such a connection can occur via a friction fit or similar coupling method or technique, and can include one or more O-rings and / or other sealing components or features, at least in some embodiments. However, in other embodiments, the proximal end 110 of the tip 100 can be configured to be coupled or otherwise secured to the handpiece assembly using one or more other connection methods or techniques, as desired or required.

[0044] With continued reference to the rear perspective view of the tip 100 shown in FIG. 2B and FIG. 2D to FIG. 2H The tip 100 can include a stem or other fluid connector 120. Such a stem 120 can extend at least partially within a cavity or other interior region or portion defined by the cylindrical portion 114 of the proximal end 110 of the tip 100. In some embodiments, the stem or other fluid connector 120 extends proximally past the cylindrical portion 120 and / or other components of the tip proximal end. However, in other embodiments, the stem 120 is flush or substantially flush with the proximal end of the cylindrical portion 114, as desired or required. Regardless of its exact shape, size, and / or other features, the stem 120 can be configured to at least partially penetrate an opening (e.g., a fluid delivery port or opening 22 located along the distal end 112 of the handpiece 10). Thus, in some arrangements, one or more openings 122 defined and / or formed by the stem 120 can be configured to receive a treatment fluid delivered through the handpiece to the tip 100 (e.g., to deliver such a fluid to a skin surface being treated).

[0045] As FIG. 2DAs shown, the proximal portion 110 (e.g., proximal cylindrical portion 114) of the tip has a diameter or other cross-sectional outer dimension (e.g., generally represented by dl) that is less than a diameter or other cross-sectional outer dimension (e.g., of the peripheral lip or member 132) of the distal portion 130 of the tip (e.g., generally represented by d2). For example, the ratio of d2 to dl of the tip 100 can be 1.1 to 2 (e.g., 1.4 to 1.6, 1.3 to 1.7, 1.2 to 1.8, 1.1 to 1.9, 1.01 to 2, 1.1 to 2, a ratio between the aforementioned ratios, etc.). Relatedly, the outer dimension of the distal portion 130 (e.g., peripheral lip 132) is 10% to 100% (e.g., 30% to 70%, 40% to 60%, 45% to 55%, a percentage between the aforementioned ranges, etc.) greater than the outer dimension of the proximal portion 110 (e.g., cylindrical portion 114) of the tip. However, in other embodiments, the diameter or other cross-sectional outer dimension dl of the proximal portion 110 is equal to, substantially equal to, or greater than the diameter or other cross-sectional outer dimension d2 of the distal portion 130 of the tip, as desired or required.

[0046] Referring to FIG. 2E and FIG. 2F the tip 100 can include a curved or partially circular or curved transition 118 (e.g., transition zone or block) between the proximal portion 110 and the distal portion 130. However, in other arrangements, the transition can be sharp and / or non-curved, non-circular, or non-circular-shaped.

[0047] In some embodiments, for example FIG. 2A to FIG. 2H the embodiment shown, the distal portion (e.g., distal end) 130 of the tip 100 can have a greater diameter or other cross-sectional dimension than the proximal portion (e.g., proximal end) 110. However, for any of the embodiments disclosed herein, the distal portion (e.g., distal end) 130 of the tip 100 has a diameter or other cross-sectional dimension that is equal to or less than the proximal portion (e.g., proximal end) 110.

[0048] In embodiments where the distal portion (e.g., distal end) 130 of the tip is larger than the proximal portion (e.g., proximal end) 110, the cross-sectional shape of the tip 100 can form (e.g., substantially form) a “T” shape or similar shape, with the enlarged distal portion configured to contact skin tissue during use of the tip. In some arrangements, the larger distal portion 130 of the tip is limited to the distal-most end of the tip. For example, the larger distal end 130 can be limited to 0% to 20% (e.g., 0 to 5%, 5% to 10%, 0 to 10%, 0 to 15%, 0 to 20%, 10% to 20%, a percentage within the ranges noted above, etc.) of the length (e.g., along the longitudinal axis of the tip) distally. In some embodiments, the distal portion 130 can be smaller than the proximal portion 110 of the tip. In some embodiments, portions of the distal portion 130 can be larger (e.g., more radially outward) than other portions of the distal portion 130.

[0049] In some embodiments, the waste openings 154 are positioned along the distal end of the tip, such that they are in fluid communication with a zone below the distal end. For example, the vacuum or suction ports or openings 154 can extend below the distal portion 130 of the tip to an annular or other collection zone or region A. In some arrangements, waste fluid, other debris, and / or other material that is diverted proximally through the vacuum or suction ports or openings 154 can be collected in such a region (e.g., in the annular region A defined between the interior of the cylindrical portion 114 and the stem 120). FIG. 4 In embodiments, the interior features along the distal end or portion 130 can extend further (e.g., in the radial direction, away from the radial center point of the tip) than one or more of the vacuum or suction ports or waste openings 154.

[0050] As FIG. 2A and FIG. 2C depicted, the tip 100 can include one or more features or members 140 that form a desired pattern along the zone defined by the peripheral lip or member 132 along the distal portion 130 of the tip. For example, the following in connection with FIGS. 2A-2C depict various patterns that can be formed by the features or members 140 along the distal portion 130 of the tip 100. FIG. 3Additional details are provided regarding such internal features 140. Such internal features 140 can provide one or more functions, including, for example, abrading or exfoliating skin tissue as the tip 100 is moved relative to the skin tissue being treated, creating a desired flow pattern of any treatment fluid delivered from a fluid source (e.g., a vial, a manifold system, a manifold or manifold assembly, a block, a fluid control member, a collection cavity or member, etc.) to the tip, and / or the like. The tip 100 can include one or more fluid delivery ports or openings 150. Such ports or openings 150 can be located at, along, or near the center of the tip (e.g., radially centered along the distal portion or distal face 130 of the tip). However, in other embodiments, such fluid delivery ports or openings 150 are located at any other location of the tip as needed or desired, in addition to or instead of being located at or near the center. Regardless of the exact number, size, location, orientation, and / or other details of the fluid delivery ports or openings, these ports or openings can be in fluid communication with one or more openings 122 (e.g., openings defined and / or created by the stem 120) that extend to or along the proximal portion 110 of the tip. Thus, once the tip 100 is secured to the distal end 112 of the handpiece 10, such proximal openings can be placed in fluid communication with one or more fluid delivery ports, openings, conduits, passageways, etc. of the handpiece 10.

[0051] Likewise, the tip can include one or more vacuum or suction ports or openings 154 along the distal end 130 of the tip. As shown, the tip can include a plurality of vacuum or suction ports or openings 154. In the illustrated embodiment, the tip 100 includes a total of eight vacuum or suction ports or openings 154. However, in other arrangements, the tip 100 can include more or less than 8 (e.g., 1, 2, 3, 4, 5, 6, 7, 9, 10, 10-15, more than 15, etc.) vacuum or suction ports or openings 154 as needed or desired. FIG. 2A to FIG. 2H

[0052] As shown, the tip can include a plurality of vacuum or suction ports or openings 154. In the illustrated embodiment, the tip 100 includes a total of eight vacuum or suction ports or openings 154. However, in other arrangements, the tip 100 can include more or less than 8 (e.g., 1, 2, 3, 4, 5, 6, 7, 9, 10, 10-15, more than 15, etc.) vacuum or suction ports or openings 154 as needed or desired. FIG. 2B to FIG. 2D ​As shown, the vacuum or suction ports or openings 154 can be fluidly coupled to one another such that, once the vacuum or suction source is activated, a vacuum or suction is applied to all of the ports or openings 154. The vacuum or suction ports or openings 154 can extend below the distal portion 130 (e.g., a face or surface defining the vacuum or suction ports 154), through one or several waste openings 124, to an annular or other collection region or zone. In some arrangements, waste fluid, other debris, and / or other material that is diverted proximally through the vacuum or suction ports or openings 154 can be collected in this zone (e.g., an annular zone A defined between the interior of the cylindrical portion 114 and the stem 120). In some embodiments, this annular or other collection region or zone is placed in fluid communication with one or more suction or vacuum ports or openings of the handpiece 10 (e.g., see FIG. 1A ) to aid in the removal of any collected material from the tip 100 (e.g., using a vacuum or suction applied to the handpiece toward a waste receptacle).

[0053] As noted above, the tip 100 can include one or more structures, features, members, and / or other components 140 that are configured to at least partially abrade tissue as the tip is moved relative to the skin. This abrasion can be at least partially caused by the movement of the abrasive structures relative to the skin tissue and the frictional or resistive forces created by this movement of the abrasive structures relative to the subject's skin tissue. In some embodiments, these features have a sharp or substantially sharp characteristic to aid in the abrasion of the skin tissue. In some arrangements, these features are fixed and incorporated into the tip (e.g., as part of the overall structure having the tip). In some embodiments, the abrasive structures are positioned along the interior defined by the peripheral lip 132. In other embodiments, the peripheral lip 132 at least partially comprises the abrasive structures, in addition to or in lieu of any additional (e.g., interior) abrasive structures or features 140.

[0054] The tips can be disposable such that they can be discarded and / or replaced during or after a treatment procedure. However, in other arrangements, the tips can be configured to be reusable (e.g., due to its material (e.g., stainless steel, other metal or alloy, other composite material, etc.), due to its construction or design, etc.). Thus, in some arrangements, the tips are configured to withstand temperature changes, chemicals, and / or other conditions that they can be subjected to for cleaning, sterilization, disinfection, and / or similar conditions.

[0055] In some embodiments, a plane defined by a distal-most portion of the tip (e.g., along a distal end of the distal portion 130) can be angled relative to a longitudinal axis of the tip (and the handpiece to which the tip is secured) and an orthogonal or perpendicular axis of the longitudinal axis (e.g., see FIG. 2E and FIG. 2F ). This can provide one or more advantages or benefits to a user manipulating the handpiece assembly, including increasing a surface area of such a plane, providing improved ergonomic, functional, and comfort features, and / or the like. In some examples, the angle Θ (see, e.g., FIG. 2E ) is 10 to 20 degrees (e.g., 10 to 11 degrees, 11 to 12 degrees, 12 to 13 degrees, 13 to 14 degrees, 14 to 15 degrees, 15 to 16 degrees, 16 to 17 degrees, 18 to 19 degrees, 19 to 20 degrees, angles between ranges described above, etc.). In other embodiments, the angle Θ is less than 10 degrees or greater than 20 degrees, as desired or required.

[0056] The tip 100 can be manufactured as a single member. In other words, the tip 100 can include a unitary or monolithic structure. Such a tip 100 can be manufactured using any suitable manufacturing method, such as but not limited to injection molding, other molding, thermosetting or molding techniques, and / or the like. The tip 100 can be rigid or semi-rigid. In some arrangements, the tip includes one or more plastic materials. However, the tip 100 can include one or more other types of materials, in addition to or in lieu of plastic, such as metal or alloy (e.g., stainless steel), rubber, other composite materials, man-made materials, natural materials, and / or the like, as desired or required. As noted above, the tip 100 can be disposable or reusable. In some embodiments, the tip is manufactured using recyclable and / or reusable materials and / or using one or more green or environmentally friendly methods or techniques.

[0057] Referring to the annotated view shown in FIG. 3 , the distal portion 130 of the tip 100 can include one or more internal features (e.g., protruding members) 140 extending distally (e.g., toward a distal end of the tip, and thereby toward a skin surface to be treated using the tip). As noted above, such internal features can be molded or otherwise formed with other portions of the tip as a single monolithic or unitary construction. However, in other embodiments, such internal features 140 can be formed separately from other portions of the tip. For example, such features 140 can be added and / or otherwise formed after the remainder of the tip is able to be manufactured (e.g., by securing the features to the distal portion 130 of the tip, by removing material from the distal portion 130 of the tip and / or otherwise manipulating the distal portion 130 of the tip, etc.).

[0058] Regardless of how the internal features 140 of the tip 100 are made, these features 140 can assist in abrading (e.g., exfoliating, removing, etc.) skin tissue as the handpiece and tip are moved relative to the skin being treated. As noted above, such abrasion can be at least partially caused by the mechanical frictional or resistive forces exerted on the skin tissue by the abrasive structure and / or other abrasive members or features of the tip or other distal portion of the handpiece. In addition, the features 140 can help create a desired flow pattern for any fluid that enters the distal portion 130 of the tip. For example, fluid that enters the distal portion 130 via one or more fluid delivery ports or openings 150 can be directed in the pattern represented by the fluid flow arrows Fl, F2, F3, F4, F5 provided in FIG. 1 to one or more suction or waste ports or openings 154. As shown and described above, the depicted tip 100 includes a total of 8 vacuum or waste ports or openings 154. However, the tip can include more or fewer such ports or openings 154 as desired or required. In some embodiments, the height of the features 140 on the tip 100 can vary, and / or their distal most surfaces can be angled relative to the distal portion 130 of the tip 100. In some embodiments, some of the internal features 140 are positioned within the flow paths created by other internal features 140 to further assist in directing treatment fluid along the tip. In some embodiments, the internal features 140 can assist in directing treatment fluid to or near a target skin surface. FIG. 3 In some embodiments, the internal features 140 can be configured to assist in directing treatment fluid to or near a target skin surface. For example, the internal features 140 can be configured to direct treatment fluid to or near a target skin surface in a manner that is similar to the manner in which the internal features 140 are configured to direct treatment fluid to or near the distal portion 130 of the tip 100. In some embodiments, the internal features 140 can be configured to direct treatment fluid to or near a target skin surface in a manner that is different than the manner in which the internal features 140 are configured to direct treatment fluid to or near the distal portion 130 of the tip 100. For example, the internal features 140 can be configured to direct treatment fluid to or near a target skin surface in a manner that is similar to the manner in which the internal features 140 are configured to direct treatment fluid to or near the distal portion 130 of the tip 100, but in a manner that is different than the manner in which the internal features 140 are configured to direct treatment fluid to or near the distal portion 130 of the tip 100.

[0059] According to some embodiments, the illustrated tip 100 is configured to create a tortuous flow pattern from the inlet or fluid delivery port 150 to one or more of the vacuum ports or waste ports 154. This can help prevent or reduce the likelihood of shorting between the inlet port or opening 150 and the vacuum port or opening or waste port or opening 154. In some embodiments, this can increase the likelihood that the treatment fluid delivered to the tip covers a greater surface area of the tip (and thus the adjacent skin tissue being treated). In some arrangements, the tortuous flow pattern can help increase the period of time that the treatment fluid lingers along the tip (and thus the tip-skin surface interface). This can be a result of preventing or reducing the likelihood of shorting between the inlet 150 and the waste port 154 (e.g., by using internal features to create a longer fluid path between the inlet 150 and the waste port 154). In some embodiments, creating a tortuous flow pattern can increase the velocity of the treatment fluid through the various channels and / or other fluid paths created by the internal features. In certain modifications, increasing the fluid velocity can provide one or more benefits to the treatment procedure, such as but not limited to, facilitating the fluid to penetrate more deeply into the skin tissue. In some embodiments, this can improve the efficacy of the procedure and provide better results for the subject receiving the treatment procedure (e.g., the fluid penetrates more deeply into the skin tissue, greater velocity of fluid is delivered to the tip 100, etc.).

[0060] In some embodiments, including a tortuous path (e.g., a longer fluid path between the inlet 150 and the waste port 154) can advantageously increase the area of the skin surface that is swept over or otherwise contacted by the treatment fluid delivered to the skin surface. Moreover, the tortuous path created by the internal features and along the distal end of the tip can provide a more uniform distribution of the treatment fluid (e.g., serum). This improved uniformity of fluid distribution can occur for the entire tip surface area and / or each zone or segment S of the tip. Relatedly, the tortuous fluid path created by the internal features can provide enhanced (e.g., uniform) contact between the tip and the adjacent skin surface being treated.

[0061] As FIG. 3 illustrated, the tip can include a total of four segments S (e.g., quadrants) through which the treatment fluid and / or other materials delivered to the tip pass. However, in other embodiments, the tip can include more or fewer segments S as desired or required, such as 1, 2, 3, 5, 6, 7, 8, 9, 10, more than 10. In the illustrated embodiment, each segment S (e.g., quadrant) includes two waste ports or openings or vacuum ports or openings 154. However, in other arrangements, the number of waste ports or openings 154 can be different (e.g., 1, 3, 4, more than 4, etc.). Moreover, as FIG. 3As shown, the individual segments S along the distal portion 130 of the tip 100 can be symmetrical (e.g., from the perspective of the features, ports 150, 154, etc.); alternatively, the individual segments S can be asymmetrical, as desired or required by the design or configuration. In some embodiments, the segments S can be symmetrical on the tip such that each segment is symmetrical about an axis that passes through and is perpendicular to the peripheral lip. In some embodiments, the segments S can be symmetrical with respect to themselves. In some embodiments, the segments S can be symmetrical with respect to themselves on an axis that passes through the center of the tip 100, the segments S, and the peripheral lip 132. In some embodiments, the segments S can be identical to one or more segments S on the tip 100.

[0062] With continued reference to FIG. 3 In some embodiments, treatment fluid and / or other materials are delivered to the distal portion 130 of the tip 100 through the central opening or port 150. From there, the fluid and / or materials can flow in a radially outward direction through a plurality of channels or passages that are equally spaced (e.g., oriented 90 degrees from one another), such as generally indicated by Fl. Thus, the fluid and / or other materials can be delivered to or near the radial periphery of the tip (e.g., adjacent the peripheral lip 132). From there, the fluid can split or divide in two angularly and generally opposite directions (e.g., generally indicated by F2), as shown at split point Dl. The fluid and / or other materials will then be directed in a radially inward direction (e.g., generally indicated by F3) at or near split point D2. The fluid and / or other materials will further split at split point D3 such that the fluid and / or other materials will again reverse the radial direction (e.g., generally indicated by F4) to a radially outward flow direction. In some embodiments, this flow split can occur again at or near split point D4 to reverse the flow of the fluid and / or materials to a radially inward flow direction (e.g., generally indicated by F5). As shown, at this stage, the fluid and / or other materials (including any exfoliated skin or other tissue) can be removed from the distal portion 130 of the tip 100 via one or more waste or vacuum ports 154.

[0063] Thus, in some embodiments, the tip 100 is configured to create a fluid flow pattern through a series of channels or other fluid pathways that switches the radial direction at least 1, 2, 3, or 4 times (or more than 4 times). However, in other embodiments, the tip 100 is configured to create a fluid flow pattern through a series of channels or other fluid pathways that switches the radial direction only once or twice, as desired or required.

[0064] With continued reference to FIG. 3The internal feature or component 140 may include a shape, orientation, and configuration that is "wrapped," rotated, or changes its own orientation at least once (e.g., once, twice, three times, etc.). This can be created by causing the internal feature or component 140 to change orientation using one or more segments 142, 144, 146, 148, 149.

[0065] In some embodiments, the internal feature 140 includes individual and distinct segments or portions 141A, 141B, 141C, 141D. According to some arrangements, each segment or portion S of the tip includes its own distinct segments or portions 141A, 141B, 141C, 141D of the internal feature 140. In some arrangements, each distinct segment or portion 141A, 141B, 141C, 141D (e.g., protrusions forming such segments or portions) is discontinuous with other distinct segments or portions 141A, 141B, 141C, 141D (e.g., protrusions forming such segments or portions).

[0066] In some embodiments, such as FIG. 3 As shown, different segments or portions 141A, 141B, 141C, and 141D create fluid pathways that guide fluid entering inlet 150 radially outward along the direction of the peripheral lip or other external member 132 (e.g., in the direction generally indicated by arrow F1). Thus, such radially outward channels or fluid pathways are created between adjacent different segments or portions 141A, 141B, 141C, and 141D. Once fluid passes through these channels and reaches or approaches the peripheral lip or other external member 132, the fluid can be guided in a direction parallel to or substantially parallel to the peripheral lip or other external member 132 (e.g., in the direction generally indicated by arrow F2). From there, the fluid can pass through one or more openings O (e.g., in the direction generally indicated by arrow F3) along the radial outer boundaries or portions of the different segments or portions 141A, 141B, 141C, and 141D. As shown in the figure, fluid passing through these openings O will travel in a direction opposite or substantially opposite to that of fluid traveling radially outward from inlet 150 between adjacent different sections or portions 141A, 141B, 141C, 141D. Once inside the different sections or portions 141A, 141B, 141C, 141D, the fluid direction may change once or more (e.g., along any desired or required angle) before passing through the waste opening or port 154 (e.g., in the direction generally indicated by arrows F4 and F5). However, in other embodiments, the number, shape, size, spacing, orientation, and / or other characteristics or configuration of the different sections or portions 141A, 141B, 141C, 141D may differ from those shown herein. For example, FIG. 5The tip 200 includes a simpler internal flow pattern for each segment or section 241A, 241B, 241C, 241D. Furthermore, FIG. 6 The tip 300 includes only two distinct segments or portions 341A and 341B. However, in other embodiments, the tip may include more or fewer than two or four distinct segments or portions (e.g., three, five, six, seven, eight, or more than eight) as needed or required.

[0067] For any embodiment disclosed herein or its equivalents, waste openings, ports, or outlets 154, 254, 354 are located within different sections or portions 141A, 141B, 141C, 141D, 241A, 241B, 241C, 241D, 341A, 341B. This helps prevent or reduce the possibility of flow short circuits between inlets 150, 250, 350 and waste openings, ports, or outlets 154, 254, 354.

[0068] like FIG. 4 As shown in the cross-sectional view, the internal feature or member 140 along the distal portion 130 of the tip 100 may have the same or substantially the same height as the peripheral lip or external member 132 (e.g., relative to the base surface B of the tip 100). Therefore, the peripheral lip 132 and the internal feature or member 140 may extend to or be close to the same distal plane or surface (e.g., planar, non-planar, etc.) formed along the distal end of the tip 100. FIG. 4 (The arrow DMP in the diagram roughly indicates this). However, in other embodiments, the peripheral lip 132 may extend more distally than (or “protrude” relative to) one or more of the internal features or members 140. In another arrangement, one or more of the internal features or members 140 extend more distally than (or “protrude” relative to) the peripheral lip 132. In some embodiments, the base surface from which the internal feature 140 extends may be arcuate in shape, such that the space between the more radially inward portion of the base surface and the plane formed by the peripheral lip is larger than the space between the more radially outward portion of the base surface and the plane formed by the peripheral lip. In some embodiments, the base surface may be closer to the peripheral lip 132 at its radial center than in its more radially outward portion. In some embodiments, the base surface may include a curved or partially rounded or bent transition portion to engage with the peripheral lip 132. However, in other arrangements, the transition portion may be sharp and / or non-curved, non-circular, or non-circular.

[0069] According to some embodiments, as described above FIG. 4The tip is described as having a generally planar (e.g., two-dimensional) distal end. However, in other embodiments, the distal end of the tip may at least partially form a non-planar shape. Therefore, the tip may include a convex, concave, and / or other rounded or curved distal end. In such an arrangement, the distal surface of the tip comprises a three-dimensional shape. Any tip embodiment disclosed herein may be modified as needed or required to include a non-planar distal surface.

[0070] FIG. 5 Another embodiment of the tip 200 is shown, which is configured to create a tortuous fluid path along its distal end or portion 230. (See reference herein) FIG. 2A to FIG. 2H , FIG. 3 and FIG. 4 The tip may include internal features 240 (e.g., protrusions) to assist in abrasion (e.g., exfoliation, removal, etc.) of skin tissue as the handpiece and tip move relative to the skin being treated. Furthermore, these features 240 can help create the desired flow pattern for any fluid entering the distal portion 230 of the tip. For example, as per [reference to...] FIG. 3 As discussed in the illustrated embodiments, fluid entering the distal portion 230 via one or more fluid delivery ports or openings 250 can be guided radially outward through one or more fluid paths created or otherwise defined by the internal features 240 of the tip. In some embodiments, the internal features 240 include individual and distinct segments or portions 241A, 241B, 241C, 241D. According to some arrangements, each segment or portion S of the tip includes its own distinct segments or portions 241A, 241B, 241C, 241D of the internal features 240. In some arrangements, each distinct segment or portion 241A, 241B, 241C, 241D is discontinuous with the other distinct segments or portions 241A, 241B, 241C, 241D.

[0071] Continue to pay attention FIG. 5The different segments or portions 241A, 241B, 241C, 241D create fluid passageways that direct fluid entering the inlet 250 radially outward in the direction of the peripheral lip or other outer member 232. Thus, these radially outward channels or fluid passageways are created between adjacent different segments or portions 241A, 241B, 241C, 241D. Once the fluid passes through these channels to or near the peripheral lip or other outer member 232, the fluid can be directed in a direction parallel or substantially parallel to the peripheral lip or other outer member 232. Ultimately, the fluid can pass through one or more openings O along the radially outer boundaries or portions of the different segments or portions 241A, 241B, 241C, 241D. Fluid passing through these openings O will flow in a direction opposite or substantially opposite to the fluid that passed radially outward from the inlet 250 and between adjacent different segments or portions 241A, 241B, 241C, 241D. As shown, once inside the different segments or portions 241A, 241B, 241C, 241D, the fluid direction can change one or more times (e.g., along any angle needed or required) before passing through the waste opening or port 254.

[0072] FIG. 6 A perspective view of another tip 300 is shown that is configured to create a tortuous fluid flow pattern along its distal end or portion 330. As shown, the tip has an interior feature 340 that can include only two different segments or portions 341A, 341B. Relatedly, the tip includes only two segments or portions S. As with other embodiments shown and discussed herein, the different segments or portions 341A, 341B create fluid channels or passageways between them to allow fluid entering the distal portion 330 through the inlet 350 to flow radially outward to the peripheral lip 332. The fluid can then travel along the peripheral lip 332 before entering the interior of the respective different segments or portions 341A, 341B, ultimately reaching the waste opening or port 354. In some embodiments, the waste opening or portion 354 is located within the interior of the different segments or portions 341A, 341B.

[0073] According to some embodiments, the tip 100 shown is configured to create a tortuous flow pattern from the inlet or fluid delivery port 150 to one or more of the vacuum or waste ports or openings 154. This can help prevent or reduce the likelihood of shorting between the inlet port or opening 150 and the vacuum or waste port or opening or openings 154.

[0074] While several embodiments and examples have been disclosed herein, the application extends beyond the specifically disclosed embodiments to other alternative embodiments and / or uses of the application and modifications and equivalents thereof. It is also contemplated that the specific features and aspects disclosed can be combined or substituted with other features and aspects in any manner possible by those skilled in the art. Accordingly, it will be appreciated that various features and aspects of the disclosed embodiments can be combined or substituted with other features and aspects in any manner possible by those skilled in the art. Therefore, the scope of the application should be determined by the reasonable interpretation of the appended claims and their equivalents, based on the entire disclosure and the knowledge of persons skilled in the art.

[0075] While the application is susceptible to various modifications and alternative forms, specific examples thereof have been shown in the drawings and are herein described in detail. It should be understood, however, that the application is not to be limited to the particular forms or methods disclosed, but to the contrary, the application is to cover all modifications, equivalents and alternatives falling within the spirit and scope of the various embodiments described and the appended claims. Any method disclosed herein does not require the performance of the steps in the order in which they are disclosed. The methods summarized above and set forth in greater detail below describe certain actions taken by the practitioner; however, it will be understood that they can also include the practitioner being instructed to take those actions. The methods summarized above and set forth in greater detail below describe certain actions taken by the user (e.g., in some cases, a professional); however, it will be understood that they can also include the user being instructed to take those actions. Accordingly, actions such as “moving the handpiece” or “delivering fluid” include “instructing the movement of the handpiece” and “instructing the delivery of fluid.” The scope of the disclosure also encompasses any and all overlaps, sub- ranges, and combinations thereof. Language such as “up to,” “at least,” “greater than,” “less than,” “between,” and the like includes the number cited. Numbers preceded by a term such as “about” or “approximately” include the number cited. For example, “about 10 mm” includes “10 mm.” Terms or phrases preceded by a term such as “substantially” include the term or phrase cited. For example, “substantially parallel” includes “parallel.”

Claims

1. A tip configured to be secured to a distal end of a handpiece of a skin treatment system, the tip comprising: a distal portion configured to contact skin and a proximal portion configured to be secured to a handpiece; a peripheral lip along the distal end, the peripheral lip defining an interior region; at least one fluid delivery opening located at or near a central location within the interior region and configured to deliver treatment fluid to the interior region during use; a plurality of waste openings located within the interior region and configured to remove waste fluid and other debris from the interior region during use; and at least one protrusion extending distally along the interior region, the at least one protrusion creating a plurality of fluid flow channels along the interior region from the at least one fluid delivery opening to the waste openings during use; wherein the fluid flow channels include a first fluid flow channel that moves treatment fluid in a radially outward direction from the at least one fluid delivery opening to the peripheral lip or thereabout; and wherein the fluid flow channels include at least a second fluid flow channel that moves treatment fluid in a radially inward direction from the peripheral lip or thereabout to one of the waste openings, the radially inward direction being opposite or substantially opposite the radially outward direction.

2. The tip of claim 1, wherein the peripheral lip is circular, elliptical, curved, or rounded in shape; wherein a diameter or cross-sectional dimension of the distal portion of the tip is 30% to 70% greater than a diameter or cross-sectional dimension of the proximal portion of the tip; wherein the tip comprises at least two segments, wherein each of the at least two segments includes at least one of the waste openings; and wherein one or more of the segments are symmetrical about an axis that passes through and is perpendicular to the peripheral lip.

3. The tip of claim 1, wherein the peripheral lip is circular, elliptical, curved, or rounded in shape.

4. The tip of claim 1, wherein a diameter or cross-sectional dimension of the distal portion of the tip is 30% to 70% greater than a diameter or cross-sectional dimension of the proximal portion of the tip.

5. The tip of claim 1 or 4, wherein a diameter or cross-sectional dimension of the distal portion of the tip is 40% to 60% greater than a diameter or cross-sectional dimension of the proximal portion of the tip.

6. The tip of claim 1, wherein a diameter or cross-sectional dimension of the distal portion of the tip is at least 20% greater than a diameter or cross-sectional dimension of the proximal portion of the tip.

7. The tip of claim 1, wherein the tip comprises at least two segments, wherein each of the at least two segments includes at least one of the waste openings.

8. The tip of claim 7, wherein the tip comprises a total of four segments.

9. The tip of claim 7 or 8, wherein each of the segments is identical to one or more other segments. ​ 10. The tip of claim 7 or 8, wherein one or more of the segments are symmetrical across an axis that passes through and is perpendicular to the peripheral lip.

11. The tip of claim 1, wherein the fluid flow channel comprises a third fluid flow channel that moves treatment fluid in the radially outward direction after the treatment fluid passes through the at least second fluid flow channel.

12. The tip of claim 1, wherein all sides of each of the waste openings are surrounded by the at least one protrusion.

13. The tip of claim 1, wherein the tip comprises one or more rigid or semi-rigid materials.

14. The tip of claim 1, wherein the tip comprises at least one plastic material.

15. The tip of claim 1 or 14, wherein the tip comprises at least one metal or alloy.

16. The tip of claim 1, wherein the tip is disposable.

17. The tip of claim 1, wherein the tip is reusable.

18. The tip of claim 1, wherein the tip is manufactured as a unitary or monolithic article.

19. The tip of claim 1, wherein a plane along a distal end face of the distal portion of the tip is angled relative to a longitudinal axis of the tip and relative to an axis that is perpendicular to the longitudinal axis.

20. The tip of claim 19, wherein the angle of the tip relative to the axis that is perpendicular to the longitudinal axis is 10 to 30 degrees.

21. The tip of claim 1, wherein the tip is configured for use on a torso of a subject.

22. The tip of claim 1, wherein a surface formed by a distal-most portion of the tip is planar or substantially planar.

23. The tip of claim 1, wherein a surface formed by a distal-most portion of the tip is non-planar or substantially non-planar.

24. The tip of claim 23, wherein the surface formed by the distal-most portion of the tip is convex or concave.

25. A tip configured to be secured to a distal end of a handpiece of a skin treatment system, the tip comprising: a distal portion configured to contact skin and a proximal portion configured to be secured to a handpiece; along a peripheral lip of the distal end, the peripheral lip defining an interior region; at least one fluid delivery opening located at or near a central location within the interior region and configured to deliver treatment fluid to the interior region during use; a plurality of waste openings located within the interior region and configured to remove waste fluid and other debris from the interior region during use; and at least one protrusion extending distally along the interior region, the at least one protrusion forming at least one triangular shape, wherein the at least one triangular shape comprises rounded corners. ​ wherein the at least one triangular shape formed by the at least one protrusion includes a fluid channel configured to direct treatment fluid in a radially inward direction toward a center point of the interior region toward an interior of the at least one triangular shape; and wherein the at least one protrusion extends into an interior of the at least one triangular shape such that treatment fluid directed through the fluid channel is at least redirected once before being directed into at least one of the waste openings located within the interior of the at least one triangular shape.

26. A tip configured to be secured to a distal end of a handpiece of a skin treatment system, the tip comprising: a distal portion configured to contact skin and a proximal portion configured to be secured to a handpiece; along a peripheral lip of the distal end, the peripheral lip defining an interior region; at least one fluid delivery opening located at or near a central location within the interior region and configured to deliver treatment fluid to the interior region during use; a plurality of waste openings located within the interior region and configured to remove waste fluid and other debris from the interior region during use; and at least one protrusion extending distally along the interior region, the at least one protrusion including at least two distinct protrusion portions; wherein the distinct protrusion portions create at least one fluid flow channel from the at least one fluid delivery opening to the peripheral lip or near the peripheral lip, the direction of fluid flow through the at least one fluid flow channel being radially outward; wherein each of the distinct protrusion portions includes an inlet along a radially outward section of the distinct protrusion portion; wherein the distinct protrusion portions are configured such that treatment fluid enters through the inlet in a direction opposite or substantially opposite to radially outward; and wherein the waste openings are located within the distinct protrusion portions.

27. The tip of claim 26, wherein each distinct protrusion portion includes a triangular shape or a substantially triangular shape.

28. The tip of claim 26 or 27, wherein the at least one protrusion includes two distinct protrusion portions.

29. The tip of claim 26 or 27, wherein the at least one protrusion includes four distinct protrusion portions.

30. A skin treatment system comprising a handpiece and a tip secured along a distal end of the handpiece, wherein the tip comprises the tip of any one of claims 1-29.

31. A method for treating skin, the method comprising: delivering treatment fluid to a tip of a handpiece, the handpiece comprising a body and the tip, wherein the tip is positioned at or near a distal end of the body; wherein the handpiece comprises at least one fluid conduit configured to fluidically connect the tip to a fluid source when the tip is secured to the handpiece; wherein the tip comprises at least one protrusion extending distally along an interior region defined by a peripheral lip, the at least one protrusion including at least two distinct protrusion portions; ​ wherein the at least two distinct protruding portions create at least one fluid flow channel from the at least one fluid delivery opening to the peripheral lip or thereabout, the direction of fluid flow through the at least one fluid flow channel being radially outward; and distributing the treatment fluid along at least a portion of the tip using the at least one fluid flow channel; and collecting and removing waste fluids and other debris via a plurality of waste openings of the tip and a waste conduit of the handpiece, the waste openings being configured to be in fluid communication with the waste conduit when the tip is secured to the handpiece.

32. The method of claim 31, wherein the tip further comprises at least one fluid delivery opening located at or near a central location along the interior region and configured to deliver treatment fluid to the interior region during use.

33. The method of claim 31, wherein the waste openings are located within the interior region and configured to remove waste fluids and other debris from the interior region during use.

34. The method of claim 31, wherein each of the distinct protruding portions includes an inlet along a radially outward section of the distinct protruding portion.

35. The method of claim 31, wherein the distinct protruding portions are configured such that treatment fluid enters through the one or more inlets in a direction opposite or substantially opposite to radially outward.

36. The method of claim 31, further comprising advancing the tip along a skin surface.

37. The method of claim 36, wherein advancing the tip along a skin surface abrades the skin.

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