WO2024186444A1

WO2024186444A1 - Tips for skin treatment devices and systems

Info

Publication number: WO2024186444A1
Application number: PCT/US2024/015056
Authority: WO
Inventors: Ke Xu
Original assignee: Hydrafacial LLC
Current assignee: Hydrafacial LLC
Priority date: 2023-02-10
Filing date: 2024-02-08
Publication date: 2024-09-12
Anticipated expiration: 2025-08-10
Also published as: EP4661928A1; CN120916799A

Abstract

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

Description

TIPS FOR SKIN TREATMENT DEVICES AND SYSTEMS

Related Applications

[0001] 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 made a pail of this application.

Field

[0002] This application relates generally to skin treatment, and more specifically, to tips, apparatuses, systems and methods for treating a person’s skin.

Description of the Related Art

[0003] Abrasion of the outer layer or epidermis of the skin is desirable to smooth or blend scars, blemishes, or other skin conditions that may be caused by, for example, acne, sun exposure, and aging. Standard techniques used to abrade the skin have generally been separated into two fields referred to as dermabrasion and microdermabrasion. Both techniques remove portions of the epidermis called the stratum comeum, which the body interprets as a mild injury. The body then replaces the lost skin cells, resulting in a new outer layer of skin. Additionally, despite the mild edema and erythema associated with the procedures, the skin looks and feels smoother because of the new outer layer of skin.

SUMMARY

[0004] According to some embodiments, a tip configured to be secured to a distal end of a handpiece of a skin treatment system comprises a distal portion configured to contact skin and a proximal portion configured to secure to a handpiece, a peripheral lip along the distal end, the peripheral lip defining an interior area, at least one fluid delivery opening located along at or near a central location within the interior area and configured to deliver a treatment fluid to the interior area during use, a plurality of waste openings located within the interior area and configured to remove spent fluid and other debris from the interior area during use, and at least one protrusion extending distally along the interior area, the at least one protrusion creating a plurality of fluid flow channels from the at least one fluid delivery opening to the waste openings along the interior area during use, wherein the fluid flow channels comprise a first fluid flow channel that moves treatment fluid 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 comprise at least a second fluid flow channel that moves treatment fluid in a radially inward direction from or near the peripheral lip to one of the waste openings, the radially inward direction being opposite or substantially opposite of the radially outward direction.

[0005] According to some embodiments, a shape of the peripheral lip is circular. In some embodiments, 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. In some arrangements, 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. In one embodiment, 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.

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

[0007] According to some embodiments, the fluid flow channels comprise a third fluid flow channel that moves treatment fluid in the radially outward direction following passage through the at least second fluid flow channel. In some embodiments, each of the waste openings is surrounded on all sides by the 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 item.

[0011] According to some embodiments, a plane along a distal face of the distal portion of the tip is angled relative to a longitudinal axis of the tip and relative to an axis perpendicular to the longitudinal axis. In some embodiments, an 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 to be used on a subject’s torso.

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

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

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

[0016] According to some embodiments, a method for treating skin comprises delivering a treatment fluid to a tip of a handpiece, the handpiece comprising a main body and the tip, wherein the tip is positioned at or near a distal end of the main body, wherein the handpiece comprises 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 comprises at least one protrusion extending distally along an interior area defined by a peripheral lip, the at least one protrusion comprising 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 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 spend fluid 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 comprises at least one fluid delivery opening located along at or near a central location within the interior area and configured to deliver a treatment fluid to the interior area during use.

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

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

[0020] According to some embodiments, the method further comprises advancing the tip along a skin surface. In some embodiments, advancing the tip along a skin surface abrades the skin.

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] These and other features, aspects and advantages of the present application are described with reference to drawings of certain embodiments, which are intended to illustrate, but not to limit, the present inventions. It is to be understood that these drawings are for the purpose of illustrating the various concepts disclosed herein and may not be to scale. [0022] FIG. 1 A illustrates a perspective view of handpiece configured for use in a skin treatment system, according to one embodiment;

[0023] FIG. IB illustrates a side view of the handpiece of FIG. 1A;

[0024] FIGS. 2A and 2B illustrate different perspective views of one embodiment of a tip configured to secure along a distal end of a skin treatment handpiece;

[0025] FIGS. 2C and 2D illustrate top and bottom views, respectively, of the tip of FIGS. 2 A and 2B;

[0026] FIGS. 2E and 2F illustrate side views of the tip of FIGS. 2A and 2B;

[0027] FIGS. 2G and 2H illustrate front and rear views, respectively, of the tip of

FIGS. 2 A and 2B;

[0028] FIG. 3 illustrates an annotated view of the tip of FIGS. 2A to 2H;

[0029] FIG. 4 illustrates a cross-sectional view of the tip of FIGS. 2A to 2H;

[0030] FIG. 5 illustrates a perspective view of a tip according to another embodiment; and

[0031] FIG. 6 illustrates a perspective view of a tip according to another embodiment.

DETAILED DESCRIPTION

[0032] Although the various embodiments disclosed herein have specific relevance to skin treatment (e.g., devices, system, methods of use, etc.), the features, advantages and other characteristics disclosed herein may have direct or indirect applicability in other applications, such as, for example, medical devices, mechanical devices and/or the like.

[0033] Several embodiments of the inventions disclosed herein are particularly advantageous because they include one, several, or all of the following benefits: provide for enhanced delivery of treatment fluids to the skin of a subject; provide a larger surface area for a skin treatment tip that can help with the treatment of certain anatomical portions (e.g., a person’s back or torso, other larger areas, relatively bony portions, etc.); achieve better (e.g., increased, enhanced, etc.) exfoliation/extraction and nourishment performance (e.g., using treatment fluids); create more even distribution of serums and/or other treatment fluids/materials to larger coverage areas for both exfoliation and extraction at in a faster manner; increase a velocity of fluid flow along a distal end or portion of a tip; and facilitating a user to exert forces to a skin surface (e.g., especially a “bony” skin surface) and/or the like.

[0034] FIGS. 1A and IB illustrate one embodiment of a handpiece or handheld device 10 configured to be used for skin treatment system. In some embodiments, the handpiece 10 is part of a larger skin treatment system (and/or can be used in conjunction with another device or system), such as, for example, a system that includes a tower or console (not shown). Such a tower or console can comprise a manifold assembly for receiving one or more (e.g., 1, 2, 3, 4, more than 4, etc.) bottles or other containers of treatment fluids to be used in a skin treatment procedure. The tower assembly can further include one or more waste canisters or other containers that are configured to receive spent fluids, exfoliated or otherwise removed skin tissue and/or other waste products resulting from a skin treatment procedure. In some arrangements, one or more of the bottles, canisters or other containers that are designed and otherwise adapted to be secured to the tower assembly can be replaceable, interchangeable and/or otherwise removable (e.g., for emptying, autoclaving or other types of cleaning, replacement, etc.).

[0035] In embodiments of a skin treatment system that include a tower assembly or console, such a tower assembly or console can comprise (and/or can be configured to communicate or work with) one or more input and/or output devices (e.g., a touchscreen or other monitor, a keyboard, other controllers, etc.), an outer housing or other exterior structure, tubing, one or more trays or other storage components, casters, wheels or other moving members or components, interior components (e.g., processor, memory, power source, sensors, tubing, valves and/or other hydraulic components, electrical wiring and other electrical components, etc.) and/or the like. In some embodiments, a tower system or console comprises a vacuum or suction source that is configured to couple to a handpiece 10.

[0036] A skin treatment system can be configured to permit a user (e.g., an aesthetician, a cosmetician, a dermatologist, etc.) to (1) connect a handpiece 10 to a manifold assembly as noted above (e.g., using a “dummy” cartridge 34, a luer or other connector 30, a fluid conduit extending from the luer 30 to a manifold system of a tower assembly, etc.), and/to (2) insert an actual fluid or treatment material-containing cartridge, such as, e.g., a vial, (not shown) directly into the handpiece 10, e.g., a recess 36 of the handpiece assembly. These two options can be used interchangeably to perform a treatment procedure or protocol, as desired or required.

[0037] Irrespective of if a vacuum or suction source is included as part of the skin treatment system and/or its various components (e.g., tower assembly, handpiece, etc.) or provided separate of the skin treatment system, the handpiece 10 can include one or more vacuum or suction ports or connectors 40. As shown in FIGS. 1A and IB, such a vacuum port or connector 40 can be located along a proximal end 14 of the handpiece 10.

[0038] According to some embodiments, once a handpiece 10 can be coupled to a vacuum source (e.g., via vacuum port 40, a vacuum or suction conduit (not shown), etc.) and if the vacuum source is activated, the vacuum source generates suction (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 a handpiece can help draw one or more treatment fluids to the distal end 12 (e.g., via a manifold, a manifold assembly, a block, a fluid control member, a collection lumen or member (e.g., a of a tower or console (not shown), via a vial or cartridge positioned directly 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 the tip illustrated in FIGS. 2A to 2H, any other tip disclosed herein and/or equivalents or modifications thereof.

[0039] With further reference to FIGS. 1A and IB, 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 lumen or member, other portions of a console, one or more bottles secured thereto, a vial or fluid container positioned directly into a recess or opening 36 of the handpiece 10, etc.). Such fluid communication can be facilitated by one or more conduits, channels or other passages that are internal and/or external to the handpiece.

[0040] 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 the skin treatment system, separate of the skin treatment system, etc.). Such fluid communication can be facilitated by one or more conduits, channels or other passages that arc internal or external to the handpiece.

[0041] As discussed in connection with one or more tip embodiments disclosed herein, the tip can be configured to form a seal (at least a partial one and/or a temporary one) with the skin surface being treated when the tip is positioned in a specific manner relative to such skin surface. For example, the tip can include a peripheral lip or other outer member 132 (see, e.g., FIG. 2A) that is configured to contact skin tissue during use of the handpiece. Such a lip or other peripheral member 132 can form at least a partial seal with skin and help generate or create a vacuum or suction force within an interior area circumscribed by the lip or member when the handpiece is coupled to a vacuum source and such vacuum source is activated. In turn, according to some arrangements, the vacuum or suction force along such an interior area along the tip or distal end can help draw fluids and/or other treatment materials 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 located in a device or system that is separate and distinct of, yet hydraulically coupled to, the handpiece, etc.) to the tip or distal end (e.g., using the suction or vacuum alone without the need for positive pressure exerted on the fluids or other treatment materials being transferred to the tip or distal end). Thus, in such arrangements, treatment fluids and/or other materials from vials, bottles, other containers and/or other fluid source are “pulled,” “drawn” or moved to or toward the handpiece 10 (e.g., to the distal end 12 of the handpiece, a tip secured thereto, etc.) using suction created along the distal end of the handpiece 10.

[0042] In other embodiments, treatment fluids and/or other materials can be transferred to the handpiece assembly 10 from the manifold assembly using the application of positive pressure within or along the main fluid conduit and/or the bottles or other containers secured to the manifold, manifold assembly, a block, a fluid control member, a collection lumen or member, other portions of a console, etc. This can be accomplished either in lieu of or in addition to the generation of suction along the handpiece assembly 10 (e.g., as schematically depicted in FIGS. 3 A and 3B and discussed herein).

[0043] Fluids and/or other treatment materials from two or more bottles or other containers secured to a manifold assembly (e.g., a manifold assembly, a manifold, a block, a fluid control member, a collection lumen 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 member, flow meters and/or the like to help regulate the flow of fluids and/or other materials from a fluid source (e.g., a manifold assembly or manifold, a block, a fluid control member, a collection lumen or member, a vial or cartridge, another container, etc.) to the tip 12 or distal end 14 of a handpiece.

[0044] According to some embodiments, the system is configured to 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, a block, a fluid control member, a collection lumen or member, etc.) continuously. However, in other embodiments, treatment fluid can be provided using a pulsed pattern or non-continuously. In some arrangements, a pulsed pattern 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 a skin treatment system.

[0045] According to some embodiments, the handpiece 10 includes a lever or other controller 50 for adjusting the flow of treatment fluids and/or materials 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 may be secured to the distal end 12 of a handpiece 10 such tips is provided below.

[0046] The tips illustrated and discussed herein, and/or equivalents thereof, can be configured to secure to one or more other types of handpieces and/or other modalities (e.g., besides the handpiece illustrated in FIGS. 1A and IB herein). For example, the tip can be secured to a larger or smaller handpiece, such as, for example, a lymphatic handpiece, a handpiece intended for body treatments or other larger area treatments and/or the like.

[0047] With continued reference to FIGS. 1A and IB, a cartridge 34, regardless of whether it is a cartridge that comprises fluid or other treatment material within an interior chamber or whether it is a “dummy” cartridge 34 that places the handpiece in fluid communication with a manifold or other fluid source or network, is configured to be removably positioned within a recess 36 of the handpiece 10. 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 easily accessible from the exterior of the handpiece assembly to permit a user to insert and remove a cartridge 34 within/out of the recess 36 without manipulating any portion of the handpiece 10 (e.g., without opening an interior of the handpiece, without taking any additional steps, etc.), as desired or required. 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 than the distal end 12 (and any tip secured along the distal end 12) of the handpiece 10.

[0048] For any of the skin treatment system embodiments disclosed herein, a cartridge 34 can be configured to be selectively locked and unlocked to the handpiece 10. In some arrangements, the cartridge 34 can be locked and unlocked using a rotation, twisting, pushing, sliding and/or other movement of the cartridge relative to the handpiece once the cartridge is secured to the handpiece. According to some embodiments, the cartridge 34 is configured to lock to the main body portion of the handpiece using one or more devices or methods, such as, for example, locking tabs, clasps, magnetic connectors, other fasteners and/or the like.

[0049] As noted above, in some embodiments, the “dummy” cartridge 34 of FIGS. 1A and IB can be replaced with a fluid and/or other treatment material vial or cartridge. Such a vial or other container can include one or more chambers that contain a serum and/or other treatment fluid or material. In such embodiments, the vacuum or suction force generated along the tip or distal end of the handpiece can help draw serums and/or other treatment fluids/materials stored within the vial or other container to the tip or distal end 12 when the tip or distal is positioned along the targeted skin surface.

[0050] In some embodiments, both a “dummy” cartridge 34 that is in fluid communication with a manifold (e.g., of a tower or console system) and a vial or cartridge that itself includes one or more serums or fluids, e.g., a booster vial can be used in a particular system and/or procedure. Therefore, in some arrangements, the user can swap cartridges and/or other containers 34 during and/or between treatment steps or procedures, as desired or required.

[0051] As noted above, a handpiece 10 can be used with one or a variety of skin treatment tips that can be removably and/or replaceably positioned along a distal end of handpiece. At least some embodiments of such tips 100 are illustrated and described herein. See, for example and without limitation, FIGS. 2A to 2H, 3 and 4. A tip can include any tips disclosed in U.S. Patent No. 8,048,089, filed as U.S. Pat. Appl. No. 11,392,348 on March 29, 2006 and issued on November 1 , 2011 , the entirety of which is hereby incorporated herein and made a part of this specification. Sec, for example. Figures 5A to 1 IE and the corresponding disclosure in U.S. Pat. No. 8,048,089.

[0052] FIGS. 2A to 2H illustrate different views of one embodiment of a tip 100 configured to be removably secured to, along or near a distal end 12 of a handpiece 10. As shown, 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 secure (e.g., removably) to a distal end 112 of a handpiece 10. For example, the illustrated tip 100 comprises a cylindrical portion 114 along the proximal end 110 that is shaped and sized to couple 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, at least in some embodiments, one or more O-rings and/or other sealing components or features. However, in other embodiments, the proximal end 110 of the tip 100 can be configured to couple or otherwise secure to the handpiece assembly using one or more other connection methods or technologies, as desired or required.

[0053] With continued reference to the rear perspective view of the tip 100 depicted in FIGS. 2B and 2D to 2H, the tip 100 can comprise a stem or other fluid connector 120. Such a stem 120 can extend, at least partially, within a cavity or other interior area 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 proximal end of the tip. 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., the 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 treatment fluids being delivered through the handpiece and to the tip 100 (e.g., to deliver such fluids to the skin surface being treated).

[0054] As illustrated in FIG. 2D, the diameter or other cross-sectional outer dimension (e.g., generally represented by dl) of the proximal portion 110 (e.g., the proximal cylindrical portion 114) of the tip is smaller than the diameter or other cross-sectional outer dimension (e.g., generally represented by d2) of the distal portion 130 (e.g., the diameter or cross-sectional dimension of the peripheral lip or member 132) of the tip. 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, ratios between the foregoing, etc.). Relatedly, the outer dimension of the distal portion 130 (e.g., the peripheral lip 132) is 10% to 100% (e.g., 30% to 70%, 40% to 60%, 45% to 55% greater, percentages between the foregoing ranges, etc.) greater than the outer dimension of the proximal portion 110 (e.g., the 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 larger than the diameter or other cross-sectional outer dimension d2 of the distal portion 130 of the tip, as desired or required.

[0055] With reference to FIGS. 2E and 2F, the tip 100 can include a curved or partially circular or curved transition 118 (e.g., transition zone or region) between the proximal portion 110 and the distal portion 130. However, in other arrangements, the transition can be sharp and/or non-curved, non-rounded or non-circular.

[0056] In some embodiments, such as the one illustrated in FIGS. 2A to 2H, the distal portion (e.g., the distal end) 130 of the tip 100 can have a larger diameter or other cross- sectional dimension than the proximal portion (e.g., the proximal end) 110. However, for any of the embodiments disclosed herein, the distal portion (e.g., the distal end) 130 of the tip 100 has a diameter or other cross-sectional dimension that is equal to or smaller than the proximal portion (e.g., the proximal end) 110.

[0057] In embodiments where the distal portion (e.g., the distal end) 130 is greater than the proximal portion (e.g., the proximal end) 110 of the tip, the cross-sectional shape of the tip 100 can form (e.g., substantially form) a “T“ or similar shape, with the expanded distal portion being 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 very distal end of the tip. For example, the larger distal end 130 can be limited to the distal 0% to 20% (e.g., 0 to 5, 5 to 10, 0 to 10, 0 to 15, 0 to 20, 10 to 20%, percentages between the foregoing ranges, etc.) of the length, e.g., along the longitudinal axis of the tip. 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. [0058] In some embodiments, the waste openings 154 are positioned along the distal end of the tip so they arc in fluid communication with a region 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, spent fluids, other debris and/or other materials that are transferred proximally through the vacuum or suction ports or openings 154 can be collected in such a region (e.g., the annular region A defined between an interior of the cylindrical portion 114 and the stem 120 shown in FIG. 4). In embodiments, the interior features along the distal end or portion 130 can extend further (e.g., in a radial direction, away from the radial centerpoint of the tip) than one or more of the vacuum or suction ports or waste openings 154.

[0059] As depicted in FIGS. 2A and 2C, the tip 100 can include one or more features or members 140 that form a desired pattern along the region defined by the peripheral lip or member 132 along the distal portion 130 of the tip. Additional details regarding such interior features 140 are provided below, for example, in connection with FIG. 3. Such interior features 140 can provide one or more functions, including, by way of example, abrading or exfoliating skin tissue as the tip 100 is moved relative to skin tissue being treated, creating a desired flow pattern of any treatment fluids being delivered to the tip from a fluid source (e.g., a vial, a manifold system, a manifold or manifold assembly, a block, a fluid control member, a collection lumen or member, etc.) 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 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, either in addition to or in lieu of being located at or near the center, as desired or required. Regardless of the exact quantity, size, location, orientation and/or other details about the fluid delivery port(s) or opening(s), such port(s) or opening(s) can be in fluid communication with one or more openings 122 (e.g., the opening defined and/or created by the stem 120) that extend to or along a proximal portion 110 of the tip. Thus, once the tip 100 is secured to the distal end 112 of the handpiece 10, such proximal opening(s) can be placed in fluid communication with one or more fluid delivery ports, opening, conduits, passages, etc. of the handpiece 10. [0060] 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 in FIGS. 2A to 2H, a tip can include a plurality of vacuum or suction ports or openings 154. In the illustrated embodiment, the tip 100 comprises a total of eight vacuum ports or openings 154. However, in other arrangements, the tip 100 can include more or fewer than 8 (e.g., 1, 2, 3, 4, 5, 6, 7, 9, 10, 10 to 15, more than 15, etc.) vacuum or suction ports or openings 154, as desired or required.

[0061] As illustrated by FIGS. 2B to 2D, the vacuum or suction ports or openings 154 can be fluidly coupled to each other such that vacuum or suction is applied to all ports or openings 154 once the vacuum or suction source is activated. The vacuum or suction ports or openings 154 can extend below the distal portion 130 of the tip (e.g., the face or surface that defines the vacuum or suction ports 154) through one or several waste openings 124 leading to an annular or other collection zone or region. In some arrangements, spent fluids, other debris and/or other materials that are transferred proximally through the vacuum or suction ports or openings 154 can be collected in the region (e.g., the annular region A defined between an interior of the cylindrical portion 114 and the stem 120). In some embodiments, such an annular or other collection zone or region is placed in fluid communication with one or more suction or vacuum ports or openings 24 (see, e.g., FIG. 1 A) of the handpiece 10 to help remove any collected materials away from the tip 100 (e.g., toward a waste container using vacuum or suction that is applied to the handpiece).

[0062] As discussed 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 when the tip is moved relative to skin. Such abrasion can be caused by, at least in pail, the movement of abrasive structure(s) relative to skin tissue and the resulting frictional or resistive forces created by movement of such abrasive structure(s) relative to skin tissue of a subject. In some embodiments, such features have sharp or substantially sharp features to assist with abrading skin tissue. In some arrangements, such features are stationary and are incorporated in the tip (e.g., as pail of a unitary structure with the tip). In some embodiments, the abrading structure(s) is/are positioned along an interior defined by a peripheral lip 132. In other embodiments, the peripheral lip 132 comprises the abrading structure, at least in part, either in addition to or in lieu of any additional (e.g., interior) abrading structures or features 140. [0063] The tips can be disposable so that they are discarded and/or replaced during or after a treatment procedure. However, in other arrangements, the tips can be configured (e.g., as result of its material(s) (e.g., stainless steel, other metals or alloys, other composites, etc.), as result of its construction or design, etc.) to be reusable. Thus, in some arrangements, the tips are configured to withstand the temperature variations, chemicals and/or other conditions to which they may be subjected for cleaning, disinfecting, sterilization and/or the like.

[0064] In some embodiments, a plane defined by the distal-most portion of the tip (e.g., along the distal end of the distal portion 130) can be angled relative to both the longitudinal axis of the tip (and the handpiece to which is secures) and an orthogonal or perpendicular axis of the longitudinal axis through the use of a curved or partially circular transition 118 or otherwise (see, e.g., FIG. 2E and 2F). This can provide one or more advantages or benefits to a user who is manipulating a handpiece assembly, including increasing the surface area of such a plane, providing an improved ergonomics, functionality and comfort features, and/or the like. In some examples, the angle 0 (see, e.g., FIG. 2E) is 10 to 20 degrees (e.g., 10 to 11, 11 to 12, 12 to 13, 13 to 14, 14 to 15, 15 to 16, 16 to 17, 18 to 19, 19 to 20 degrees, angles between the foregoing ranges, etc.). In other embodiments, the angle 0 is less than 10 degrees or greater than 20 degrees, as desired or required.

[0065] The tips 100 can be manufactured as a single member. In other words, a tip 100 can include a unitary or monolithic structure. Such a tip 100 can be manufactured using any suitable manufacturing method, such as, for example and without limitation, injection molding, other molding, thermosetting or forming technology and/or the like. The tips 100 can be rigid or semi-rigid. In some arrangements, the tips comprise one or more plastic materials. However, the tips 100 can include one or more other types of materials, either in addition to or in lieu of plastics, such as, for example, metals or alloys (e.g., stainless steel), rubber, other composites, manmade material, natural materials and/or like, as desired or required. As noted, the tips 100 can be disposable or reusable. In some embodiments, the tips are manufactured using recyclable and/or reusable materials and/or using one or more green or environmentally-advantageous methods or technologies.

[0066] With reference to the annotated view illustrated in FIG. 3, the distal portion 130 of the tip 100 can include one or more interior features (e.g., protruding members) 140 that extend distally (e.g., toward the distal end of the tip, and thus, toward the skin surface that will be treated using the tip). As noted above, such interior features can be molded or otherwise formed together as a single, monolithic or unitary constructions with other portions of the tip. However, in other embodiments, such interior features 140 can be formed separately of other portions of the tip. For example, such features 140 can be added and/or otherwise formed after the rest of the tip can been manufactured (e.g., by securing the features to the distal portion 130 of the tip, by removing material from and/or otherwise manipulating the distal portion 130 of the tip, etc.).

[0067] Regardless of how the interior features 140 of the tip 100 are made, such features 140 can assist with abrading (e.g., exfoliating, removing, etc.) skin tissue when the handpiece and tip are moved relative to the skin being treated. As noted above, such abrasion can be a result of, at least in part, mechanical frictional or resistive forces exerted on skin tissue by abrasive stmcture(s) and/or other abrading members or features of the tip or other distal portion of a handpiece. Further, the features 140 can help create desired flow patterns for any fluid entering the distal portion 130 of the tip. For example, fluid entering the distal portion 130 via one or more fluid delivery ports or openings 150 can be directed in a pattern represented by fluid flow arrows Fl, F2, F3, F4, F5 provided in FIG. 3 to one or more suction or waste ports or openings 154. As shown and noted above, the depicted tip 100 comprises a total of 8 vacuum or waste ports or openings 154. However, a tip can include more or fewer such ports or openings 154, as desired or required. In some embodiments, the features 140 can vary in height across the tip 100 and/or can have their distal-most surface at an angle relative to the distal portion 130 of the tip 100. In some embodiments, some of the internal features 140 are positioned within the flow path 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 a treatment fluid to or near a targeted skin surface.

[0068] According to some embodiments, the illustrated tip 100 is configured to create a tortuous flow pattern from the inlet or fluid delivery port(s) 150 to one or more of the vacuum or waste port(s) 154. This can help prevent or reduce the likelihood of short-circuiting between the inlet port(s) or opening(s) 150 and the vacuum or waste port(s) or opening(s) 154. In some embodiments, this can increase the likelihood that treatment fluids delivered to the tip cover 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 a time period that treatment fluids stay along the tip (and thus the tip-skin surface interface). This can be the result of preventing or reducing the likelihood of short-circuiting between the inlet(s) 150 and waste port(s) 154 (e.g., by creating a longer fluid pathway between the inlet(s) 150 and waste port(s) 154 using the interior features). In some embodiments, creating a tortuous flow pattern can increase the velocity of treatment fluids passing through the various channels and/or other fluid pathways created by the interior features. Increasing fluid velocity, in some adaptations, can provide one or more benefits to a treatment procedure, such as, for instance and without limitation, facilitating penetration of the fluids deeper into skin tissue. In some embodiments, this can improve the efficacy of a procedure and provide better results to the subject undergoing a treatment procedure (e.g., greater penetration of fluids into skin tissue), greater velocity of fluids being delivered to the tip 100, etc.

[0069] In some embodiments, the inclusion of a tortuous path (e.g., a longer fluid pathway between the inlet(s) 150 and waste port(s) 154) can advantageously increase the surface area of skin swept or otherwise contacted by treatment fluids delivered to the skin surface. Further, the interior features, and the tortuous path that they help create along the distal end of the tip, can provide a more uniform distribution of treatment fluids (e.g., serums). Such improved uniformity of fluid distribution can occur for the overall tip surface area and/or each zone or section S of the tip. Relatedly, the tortuous fluid path created by the interior features can provide for enhanced (e.g., uniform) contact between the tip and the adjacent skin surface being treated.

[0070] As illustrated in FIG. 3, the tip can include a total of four sections S (e.g., quadrants) through which treatment fluids and/or other materials delivered to tip pass. In other embodiments, however, a tip can include more or fewer sections S, such as, for instance, 1, 2, 3, 5, 6, 7, 8, 9, 10, more than 10), as desired or required. In the illustrated embodiment, each section S (e.g., quadrant) includes two waste 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.). Further, the various sections S along the distal portion 130 of the tip 100 can be symmetrical (e.g., from a perspective of features, ports 150, 154, etc.), as illustrated in FIG. 3; alternatively, the various sections S can be asymmetrical according to a desired or required design or configuration. In some embodiments, the sections S can be symmetric on the tip such that each section is symmetric to an axis passing through and perpendicular to the peripheral lip. In some embodiments, the sections S can be symmetric with respect to themselves. In some embodiments, the sections S can be symmetric with respect to themselves across an axis passing through the center of the tip 100, the section S, and the peripheral lip 132. In some embodiments, a section S can be identical to one or more sections S on the tip 100.

[0071] 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 a central opening or port 150. From there, fluid and/or materials can flow through a plurality of channels or passages that are equally spaced apart (e.g., at a 90 degree orientation to one another) in a radially outward direction, as generally represented by Fl. Fluid and/or other materials can thus be delivered to or near the radial perimeter of the tip (e.g., adjacent the peripheral lip 132). From there, fluid can be split or divided (e.g., as denoted by diversion point DI) in two angular and generally opposite directions (e.g., as generally represented by F2). Fluid and/or other materials will then be directed in a radially inward direction at or near diversion point D2 (e.g., as generally represented by F3). Fluid and/or other materials will be diverted further at diversion point D3 such that fluid and/or other materials again reverse radial direction (e.g., as generally represented by F4) to a radially outward flow direction. In some embodiments, this flow diversion can occur once more at or near diversion point D4 to reverse the flow of fluids and/or materials to a radially inward flow direction (e.g., as generally represented by F5). As shown, at this stage, 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.

[0072] Accordingly, in some embodiments, the tip 100 is configured to create a fluid flow pattern through a series of channels or other fluid pathways that switch 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 switch radial direction only one time or two times, as desired or required.

[0073] With continued reference to FIG. 3, the interior features or members 140 can include a shape, orientation and configuration that “wraps,” turns or changes direction on itself at least once (e.g., once, twice, three times, etc.). This can be created by having the interior features or members 140 change direction using one or more segments 142, 144, 146, 148, 149.

[0074] In some embodiments, the interior features 140 include separate and distinct sections or portions 141 A, 141B, 141C, 141D. According to some arrangements, each section or portion S of the tip includes its own distinct section or portion 141A, 141B, 141C, 141D of the interior features 140. In some arrangements, each distinct section or portion 141A, 141B, 141C, 141D (e.g., the protrusion(s) that form such a section or portion) is discontinuous of the other distinct sections or portions 141A, 141B, 141C, 141D (e.g., the protrusion(s) that form such sections or portions).

[0075] In some embodiments, as illustrated in FIG. 3, the distinct sections or portions 141A, 141B, 141C, 141D create fluid passages that direct fluid entering the inlet 150 radially outwardly in the direction of the peripheral lip or other outer member 132 (e.g., in a direction generally represented by arrow Fl). Accordingly, such radially outward channels or fluid passages are created between adjacent distinct sections or portions 141A, 141B, 141C, 141D. Once fluid has passed through these channels to or near the peripheral lip or other outer member 132, fluid can be directed in a direction parallel or substantially parallel to the peripheral lip or other outer member 132 (e.g., in a direction generally represented by arrow F2). From there, fluid can pass through one or more openings O along the radial outer border or portion of the distinct section or portion 141A, 141B, 141C, 141D (e.g., in a direction generally represented by arrow F3). As shown, fluid passing through such openings O will in a direction opposite or substantially opposite of fluid passing radially outward from the inlet 150 and between adjacent distinct sections or portions 141A, 141B, 141C, 141D. Once within an interior of a distinct section or portion 141 A, 141B, 141C, 141D fluid direction can change one or more times (e.g., along any desired or required angles) before passing through a waste opening or port 154 (e.g., in directions generally represented by arrows F4 and F5). However, in other embodiments, the quantity, shape, size, spacing, orientation and/or other characteristics or configurations of distinct sections or portions 141A, 141B, 141C, 141D can be different than illustrated herein. For example, the tip 200 of FIG. 5 includes a simpler internal flow pattern for each section or portion 241 A, 241B, 241C, 241D. Further, the tip 300 of FIG. 6 includes only two distinct sections or portions 341A, 341B. However, in other embodiments, a tip can include more or fewer than 2 or 4 distinct sections or portions (e.g., 3, 5, 6, 7, 8, more than 8), as desired or required.

[0076] For any of the embodiments disclosed herein or equivalents thereof, the waste openings, ports or outlets 154, 254, 354 are positioned within the interior of the distinct sections or portions 141A, 141B, 141C, 141D, 241A, 241B, 241C, 241D, 341A, 341B. This can help prevent or reduce the likelihood of flow short-circuiting between the inlet 150, 250, 350 and the waste openings, ports or outlets 154, 254, 354.

[0077] As illustrated in cross-sectional view of FIG. 4, the interior features or members 140 along the distal portion 130 of the tip 100 can have the same or substantially the same height as the peripheral lip or outer member 132 (e.g., relative to a base surface B of the tip 100). Thus, the peripheral lip 132 and the interior features or member 140 can extend to or near the same distalmost plane or surface (e.g., planar, non-planar, etc.) formed along the distal end of the tip 100 (denoted generally by arrow DMP in FIG. 4). In other embodiments, however, the peripheral lip 132 can extend more distally than (or be “proud” relative to) one or more of the interior features or members 140. In yet another arrangement, one or more of the interior features or members 140 extend more distally than (or be “proud” relative to) the peripheral lip 132. In some embodiments, the base surface from which the interior features 140 extend can be bowed in shape, such that there would be more space between a more radially inward portion of the base surface and the plane formed by the peripheral lip than the space between a more radially outward portion of the base surface and the plane formed by the peripheral lip. In some embodiments, the base surface can be proximally further from the peripheral lip 132 in the radial center than the base surface is in a more radially outward portion. In some embodiments, the base surface can include a curved or partially circular or curved transition to meet the peripheral lip 132. However, in other arrangements, the transition can be sharp and/or non-curved, non-rounded or non-circular.

[0078] According to some embodiments, as discussed above in connection with FIG. 4, the tip forms a generally planar (e.g., two dimensional) distal end. However, in other embodiments, the tip’s distal end can form a non-planar shape, at least in part. Thus, the tip can include a convex, concave and/or other rounded or curved distal end. In such arrangements, the tip’s distalmost surface includes a three-dimensional shape. Any of the tip embodiments disclosed herein can be modified to include a non-planar distalmost surface, as desired or required.

[0079] Another embodiment of a tip 200 that is configured to create a tortuous fluid path along its distal end or portion 230 is illustrated in FIG. 5. As noted herein with reference to FIGS. 2A to 2H, 3 and 4, the tip can include interior features 240 (e.g., protrusions) to assist with abrading (e.g., exfoliating, removing, etc.) skin tissue when the handpiece and tip are moved relative to the skin being treated. Further, such features 240 can help create desired flow patterns for any fluid entering the distal portion 230 of the tip. For example, as discussed with respect to the embodiment illustrated in FIG. 3, fluid entering the distal portion 230 via one or more fluid delivery ports or openings 250 can be directed radially outwardly through one or more fluid pathways created or otherwise defined by the interior features 240 of the tip. In some embodiments, the interior features 240 include separate and distinct sections or portions 241A, 241B, 241C, 241D. According to some arrangements, each section or portion S of the tip includes its own distinct section or portion 241A, 241B, 241C, 241D of the interior features 240. In some arrangements, each distinct section or portion 241A, 241B, 241C, 241D is discontinuous of the other distinct sections or portions 241A, 241B, 241C, 241D.

[0080] With continued attention to FIG. 5, the distinct sections or portions 241 A, 241B, 241C, 241D create fluid passages that direct fluid entering the inlet 250 radially outwardly in the direction of the peripheral lip or other outer member 232. Therefore, these radially outward channels or fluid passages are created between adjacent distinct sections or portions 241A, 241B, 241C, 241D. Once fluid has passed through these channels to or near the peripheral lip or other outer member 232, fluid can be directed in a direction parallel or substantially parallel to the peripheral lip or other outer member 232. Eventually, fluid can pass through one or more openings O along the radial outer border or portion of the distinct section or portion 241A, 241B, 241C, 241D. Fluid passing through such openings O will flow in a direction opposite or substantially opposite of fluid passing radially outward from the inlet 250 and between adjacent distinct sections or portions 241A, 241B, 241C, 241D. As shown, once within an interior of a distinct section or portion 241 A, 24 IB, 241 C, 24 ID fluid direction can change one or more times (e.g., along any desired or required angles) before passing through a waste opening or port 254. [0081] FIG. 6 illustrates a perspective view of another tip 300 that is configured to create a tortuous fluid flow pattern along its distal end or portion 330. As shown, the tip has interior features 340 can comprise only two distinct sections or portions 341 A, 34 IB. Relatedly, the tip includes only two sections or portions S. As with other embodiments illustrated and discussed herein, the distinct sections or portions 341 A, 34 IB create fluid channels or pathways between them to permit fluid entering the distal portion 330 through the inlet 350 to flow radially outwardly toward the peripheral lip 332. Fluid can then travel along the peripheral lip 332 before entering an interior of the corresponding distinct section or portion 341 A, 34 IB, eventually to a waste opening or port 354. In some embodiments, the waste openings or portions 354 are positioned within the interior of the distinct sections or portions 341A, 341B.

[0082] According to some embodiments, the illustrated tip 100 is configured to create a tortuous flow pattern from the inlet or fluid delivery port(s) 150 to one or more of the vacuum or waste port(s) 154. This can help prevent or reduce the likelihood of short-circuiting between the inlet port(s) or opening(s) 150 and the vacuum or waste port(s) or opening(s) 154.

[0083] Although several embodiments and examples are disclosed herein, the present application extends beyond the specifically disclosed embodiments to other alternative embodiments and/or uses of the inventions and modifications and equivalents thereof. It is also contemplated that various combinations or subcombinations of the specific features and aspects of the embodiments may be made and still fall within the scope of the inventions. Accordingly, it should be understood that various features and aspects of the disclosed embodiments can be combined with or substituted for one another in order to form varying modes of the disclosed inventions. Thus, it is intended that the scope of the present inventions herein disclosed should not be limited by the particular disclosed embodiments described above, but should be determined only by a fair reading of the claims that follow.

[0084] While the inventions are 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 inventions are not to be limited to the particular forms or methods disclosed, but, to the contrary, the inventions are to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the various embodiments described and the appended claims. Any methods disclosed herein need not be performed in the order recited. The methods summarized above and set forth in further detail below describe certain actions taken by a practitioner; however, it should be understood that they can also include the instruction of those actions by another party. The methods summarized above and set forth in further detail below describe certain actions taken by a user (e.g., a professional in some instances); however, it should be understood that they can also include the instruction of those actions by another party. Thus, actions such as ‘‘moving a handpiece” or ‘‘delivering a fluid” include “instructing moving a handpiece” and “instructing delivering a fluid.” The ranges disclosed herein also encompass any and all overlap, subranges, and combinations thereof. Language such as “up to,” “at least,” “greater than,” “less than,” “between,” and the like includes the number recited. Numbers proceeded by a term such as “about” or “approximately” include the recited numbers. For example, “about 10 mm” includes “10 mm.” Terms or phrases preceded by a term such as “substantially” include the recited term or phrase. For example, “substantially parallel” includes “parallel.”

Claims

WHAT IS CLAIMED IS:

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 secure to a handpiece; a peripheral lip along the distal end, the peripheral lip defining an interior area; at least one fluid delivery opening located along at or near a central location within the interior area and configured to deliver a treatment fluid to the interior area during use; a plurality of waste openings located within the interior area and configured to remove spent fluid and other debris from the interior area during use; and at least one protrusion extending distally along the interior area, the at least one protrusion creating a plurality of fluid flow channels from the at least one fluid delivery opening to the waste openings along the interior area during use; wherein the fluid flow channels comprise a first fluid flow channel that moves treatment fluid 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 comprise at least a second fluid flow channel that moves treatment fluid in a radially inward direction from or near the peripheral lip to one of the waste openings, the radially inward direction being opposite or substantially opposite of the radially outward direction.

2. The tip of Claim 1, wherein a shape of the peripheral lip is rounded, oval, curved or circular; 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 sections, wherein each of the at least two sections comprises at least one of the waste openings; and wherein one or more of the sections is symmetric across an axis passing through and perpendicular to the peripheral lip.

3. The tip of Claim 1 , wherein a shape of the peripheral lip is rounded, oval, curved or circular.

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 sections, wherein each of the at least two sections comprises at least one of the waste openings.

8. The tip of Claim 7, wherein the tip comprises a total of four sections.

9. The tip of Claim 7 or 8, wherein each of the sections is identical to another section or sections.

10. The tip of Claim 7 or 8, wherein one or more of the sections is symmetric across an axis passing through and perpendicular to the peripheral lip.

11. The tip of Claim 1 , wherein the at fluid flow channels comprises a third fluid flow channel that moves treatment fluid in the radially outward direction following passage through the at least second fluid flow channel.

12. The tip of Claim 1, wherein each of the waste openings is surrounded on all sides 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 item.

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

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

21. The tip of Claim 1, wherein the tip is configured to be used on a subject’s torso.

22. The tip of Claim 1, wherein a surface formed by a distalmost portion of the tip is planar or substantially planar.

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

24. The tip of Claim 23, wherein the surface formed by a distalmost 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 secure to a handpiece; a peripheral lip along the distal end, the peripheral lip defining an interior area; at least one fluid delivery opening located along at or near a central location within the interior area and configured to deliver a treatment fluid to the interior area during use; a plurality of waste openings located within the interior area and configured to remove spent fluid and other debris from the interior area during use; and at least one protrusion extending distally along the interior area, the at least one protrusion forming at least one triangular shape, wherein the at least one triangular shape comprises rounded comers; wherein the at least one triangular shape formed by the at least one protrusion includes a fluid channel that is configured to direct treatment fluid toward into an interior of the at least one triangular shape in a radially inward direction toward a centerpoint of the interior area; and wherein the at least one protrusion extends into an interior of the at least one triangular shape to cause treatment fluid directed through the fluid channel to change direction at least one additional time before being directed to at least one of the waste openings located within an 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 secure to a handpiece; a peripheral lip along the distal end, the peripheral lip defining an interior area; at least one fluid delivery opening located along at or near a central location within the interior area and configured to deliver a treatment fluid to the interior area during use; a plurality of waste openings located within the interior area and configured to remove spent fluid and other debris from the interior area during use; and at least one protrusion extending distally along the interior area, the at least one protrusion comprises at least two distinct protrusion portions; wherein the distinct protrusion portions create at least one fluid flow channel from at least one fluid delivery opening to or near the peripheral lip, a direction of fluid flow through the at least one fluid flow channel being radially outward; wherein each of the distinct protrusion portions comprises an inlet along a radially outward section of the distinct protrusion portion; wherein the distinct protrusion portions are configured such that treatment fluids enter through the inlets in a direction opposite or substantially opposite of radially outward; and wherein the waste openings are located within an interior of the distinct protrusion portions.

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

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

29. The tip of Claim 26 or 27, wherein the at least one protrusion comprises 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 a tip according to any one of Claims 1 to 29.

31. A method for treating skin, the method comprising: delivering a treatment fluid to a tip of a handpiece, the handpiece comprising a main body and the tip, wherein the tip is positioned at or near a distal end of the main body; wherein the handpiece comprises 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 comprises at least one protrusion extending distally along an interior area defined by a peripheral lip, the at least one protrusion comprising 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 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 spend fluid 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.

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

33. The method of Claim 31, wherein the waste openings are located within the interior area and configured to remove spent fluid and other debris from the interior area during use.

34. The method of Claim 31, wherein each of the distinct protrusion portions comprises an inlet along a radially outward section of the distinct protrusion portion.

35. The method of Claim 31 , wherein the distinct protrusion portions are configured such that treatment fluids enter through one or more inlets in a direction opposite or substantially opposite of 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.