Microstructures for treating and conditioning skin

• US 6,821,281 B2
• Filed: 09/14/2001
• Issued: 11/23/2004
• Est. Priority Date: 10/16/2000
• Status: Expired due to Term

• Current Assignee: Corium, Inc.
• Original Assignee: The Procter & Gamble Company
• Inventors: Gartstein, Vladimir, Sherman, Faiz Feisal
• Primary Examiner(s): Truong, Kevin T.
• Assistant Examiner(s): NGUYEN, VI X
• Application Number:
  US09/952,403
• Publication Number:
  US 20020045907A1
• Time in Patent Office: 1,166 Days
• Field of Search: 606/131, 606/201, 606/204, 606/204.35, 606/35, 433/88, 600/556
• US Class Current: 606/131
• CPC Class Codes: A45D 26/0004 by abrasion
• CPC Class Codes: A61B 17/205 Vaccinating by means of needles or other puncturing devices
• CPC Class Codes: A61B 17/322 Skin grafting apparatus
• CPC Class Codes: A61B 17/54 Chiropodists' instruments , e.g. pedicure chiropractic devices A61H1/008
• CPC Class Codes: A61B 2017/00761 Removing layer of skin tissue, e.g. wrinkles, scars or cancerous tissue
• CPC Class Codes: A61B 2017/00765 Decreasing the barrier function of skin tissue by radiated energy, e.g. using ultrasound, using laser for skin perforation
• CPC Class Codes: A61B 2017/320008 Scrapers
• CPC Class Codes: A61M 2037/0023 Drug applicators using microneedles
• CPC Class Codes: A61M 2037/003 having a lumen
• CPC Class Codes: A61M 2037/0038 having a channel at the side surface
• CPC Class Codes: A61M 2037/0046 Solid microneedles
• CPC Class Codes: A61M 2037/0053 Methods for producing microneedles
• CPC Class Codes: A61M 37/0015 by using microneedles

Abstract

An improved method and apparatus is provided as a system to enhance skin appearance and health, in which skin is cleaned (or exfoliated) and conditioned by use of microelements affixed to a base element or hand-held patch. The dimensions of the microelements are controlled so as to remove a certain number of layers of skin cells and to accumulate those skin cells, along with other foreign substances, into areas between the microelements. In addition, a conditioning compound or therapeutic active can be applied to the exfoliated skin to enhance the skin. Moreover, the amount of accumulated skin cells represents a self-limiting maximum quantity that cannot be substantially exceeded regardless of the number of attempts by a user to re-use the microstructure apparatus.

Claims

1. A method for removing cells from skin, said method comprising:

(a) providing a microstructure having a substrate and a plurality of microelements;

(b) placing said microstructure on skin then rubbing the microstructure against said skin, and along the surface of the skin, thereby scraping and accumulating skin cells on said substrate in areas between said plurality of microelements; and

(c) withdrawing said microstructure from said skin, and thereby removing a large majority of said skin cells that have accumulated upon said substrate;

said method further comprising the steps of;

providing a fluidic compound that flows through first passageways in said substrate, then along channels in walls of said microelements and through second passageways in said microelements, thereby both exfoliating said skin and delivering said fluidic compound to said skin in a single procedure.

2. The method as recited in claim 1, wherein a shape of at least some of said plurality of microelements and their adjacent substrate comprises one of:

(a) a pyramid having at least one channel along a wall of said pyramid, and at least one passageway in said substrate proximal to the wall of said pyramid, said channel being in fluidic communication with said passageway;

or

(b) an open, topless box having three walls, and at least one passageway in said substrate proximal to one of said three walls;

or

(c) a wedge having at least one passageway therethrough which is in fluidic communication with at least one other passageway in said substrate;

or

(d) an elongated triangle having at least one channel along a wall of said elongated triangle, and at least one passageway in said substrate proximal to the wall of said elongated triangle, said channel being in fluidic communication with said passageway;

or

(e) an inverted wedge with curved side walls having at least one passageway therethrough which is in fluidic communication with at least one other passageway in said substrate;

or

(f) an inverted wedge with substantially flat side walls having at least one passageway therethrough which is in fluidic communication with at least one other passageway in said substrate.

3. The method as recited in claim 2, further comprising:

(a) providing at least one chamber that holds said fluidic compound on a distal side of said substrate, wherein said distal side is opposite of a proximal side of said substrate upon which said microelements are formed; and

(b) delivering at least one said fluidic compound from said chamber through said at least one passageway in said substrate onto said skin.

4. The method as recited in claim 1, further comprising:

after said step of withdrawing the microstructure from the skin, manually applying a fluidic compound to substantially a same area of said skin.

5. The method as recited in claim 1, further comprising:

providing a fluidic compound on a same surface of said microstructure which contains said microelements, wherein said fluidic compound is at least in part applied to substantially a same area of said skin during said rubbing step.