Follicular extraction method and device

• US 8,211,117 B2
• Filed: 12/09/2008
• Issued: 07/03/2012
• Est. Priority Date: 04/08/2004
• Status: Active Grant

• Current Assignee: Hsc Development LLC, Venus Concept, Inc.
• Original Assignee: Hsc Development LLC
• Inventors: Harris, James A
• Primary Examiner(s): Hughes, S. Thomas
• Assistant Examiner(s): SIMPSON, SARAH A
• Application Number:
  US12/331,057
• Publication Number:
  US 20090088776A1
• Time in Patent Office: 1,302 Days
• Field of Search: 606/133, 606/187
• US Class Current: 606/133
• CPC Class Codes: A61B 17/32053 Punch like cutting instruments, e.g. using a cylindrical or oval knife A61B17/326 takes precedence; trepans A61B17/1695; for use on the cornea A61F9/007
• CPC Class Codes: A61B 17/3468 for implanting or removing devices, e.g. prostheses, implants, seeds, wires devices for implanting seeds A61M37/0069
• CPC Class Codes: A61B 2017/00752 Hair removal or transplantation
• CPC Class Codes: A61B 2017/306 holding by means of suction
• CPC Class Codes: A61B 2017/320044 Blunt dissectors
• CPC Class Codes: A61F 2/10 Hair or skin implants

Abstract

A method and device for the extraction of follicular units from a donor area on a patient. The method includes scoring the outer skin layers with a sharp punch, and then inserting a blunt punch into the incision to separate the hair follicle from the surrounding tissue and fatty layer. The method and device will significantly decrease the amount of follicular transection and increase the rate at which follicular units can be extracted.

Claims

1. A method for the extraction of a follicular unit from a donor area, comprising the steps of:

(a) scoring a portion of a donor area with a sharp scoring punch to form an incision having a first depth;

(b) inserting a blunt dissecting punch that is less sharp than the scoring punch into the incision to a second depth that is greater than said first depth and forming a follicular unit, wherein the blunt dissecting punch comprises a dissecting distal tip and a lumen at the dissecting distal tip; and

(c) removing the follicular unit from the donor area;

wherein the sharp scoring punch is disposed within the blunt dissecting punch lumen.

2. The method as recited in claim 1, wherein said dissecting distal tip is serrated.

3. The method as recited in claim 1, wherein said scored incision is substantially circular.

4. The method as recited in claim 1, wherein said scored incision has a diameter of from about 0.1 mm to about 1.1 mm.

5. The method as recited in claim 1, wherein said scored incision has a diameter of from about 0.7 mm to about 1 mm.

6. The method as recited in claim 1, wherein said first depth is not greater than about 1.5 mm.

7. The method as recited in claim 1, wherein said first depth is from about 0.3 mm to about 1.5 mm.

8. The method as recited in claim 1, wherein said second depth is from about 1.5 mm to about 8 mm.

9. The method as recited in claim 1, wherein said second depth is from about 4 mm to about 7 mm.

10. The method as recited in claim 1, wherein said blunt dissecting punch is removed from the donor area before said step of removing said follicular unit.

11. The method as recited in claim 1, wherein said step of removing said follicular unit comprises removing the follicular unit using forceps.

12. The method as recited in claim 1, wherein said step of removing said follicular unit comprises using suction.

13. The method as recited in claim 1, further comprising the step of separating a bottom portion of said follicular unit from the fatty layer before said removing step.

14. The method as recited in claim 1, wherein said step of inserting said blunt dissecting punch comprises rotating said blunt dissecting punch about a primary axis of said blunt dissecting punch.

15. The method as recited in claim 1, further comprising the step of transplanting said follicular unit.

16. The method as recited in claim 1, wherein the removing step comprises removing the follicular unit at least in part by applying a force to a top end of the follicular unit.

17. The method as recited in claim 1, wherein the dissecting distal tip comprises an outer diameter that is tapered.

18. The method as recited in claim 1, wherein the dissecting distal tip comprises a rounded annular dissecting edge.

19. The method as recited in claim 1, wherein at least one of the scoring step and the inserting/forming step is mechanized.

20. The method as recited in claim 1, wherein the sharp scoring punch is retracted into the blunt dissecting punch lumen before the inserting step.

21. The method as recited in claim 1, wherein the blunt dissecting punch lumen has an inner diameter of from about 0.8 mm to about 1.0 mm.

22. The method as recited in claim 1, wherein the inserting step comprises advancing the dissecting distal tip through the dermis and into the fatty layer of the donor area.

23. The method as recited in claim 1, wherein the inserting step separates fibrous attachments surrounding the follicular unit to leave the follicular unit attached to the fat layer at its base.

24. The method as recited in claim 1, further comprising limiting a depth of insertion of at least one of the sharp scoring punch and the blunt dissecting punch.

25. A method for the extraction of a follicular unit from a donor area, comprising the steps of:

(a) scoring a portion of a donor area with a sharp scoring punch to form a scored incision having a first depth of not greater than about 1.5 mm;

(b) inserting a blunt dissecting punch that is less sharp than the scoring punch into the scored incision to a second depth of at least about 4 mm forming a follicular unit, the blunt dissecting punch comprising a distal annular dissecting edge that forms a lumen;

(c) removing said follicular unit from the donor area; and

(d) transplanting said follicular unit in a recipient area; and

wherein the sharp scoring punch is disposed within the blunt dissecting punch lumen.

26. The method as recited in claim 25, wherein the removing step comprises removing the follicular unit at least in part by applying a force to a top end of the follicular unit.

27. The method as recited in claim 25, wherein the removing step comprises removing the follicular unit using forceps.

28. The method as recited in claim 25, wherein an outer diameter of the blunt dissecting punch proximal to the distal annular dissecting edge is tapered.

29. The method as recited in claim 25, wherein the distal annular dissecting edge is rounded.

30. The method as recited in claim 25, wherein at least one of the scoring step and the inserting/forming step is mechanized.

31. The method as recited in claim 25, further comprising limiting a depth of insertion of at least one of the sharp scoring punch and the blunt dissecting punch.

32. The method as recited in claim 25, wherein the sharp, scoring punch is retracted into the blunt dissecting punch lumen before the inserting step.

33. The method as recited in claim 25, wherein the blunt dissecting punch lumen has an inner diameter of from about 0.8 mm to about 1.0 mm.

34. The method as recited in claim 25, wherein the inserting step comprises advancing the distal annular dissecting edge through the dermis and into the fatty layer of the donor area.

35. The method as recited in claim 25, wherein said inserting step separates fibrous attachments surrounding the follicular unit to leave the follicular unit attached to the fat layer at its base.

36. A method for the extraction of a follicular unit plug from a donor area, comprising the steps of:

(a) penetrating a portion of a donor area with a sharp scoring punch to form an incision having a first depth;

(b) advancing a blunt distal tip of a blunt dissecting punch through the incision to a second depth that is greater than the first depth and forming a follicular unit plug comprising a follicular unit, the blunt dissecting punch comprising a lumen at the blunt distal tip and wherein the blunt distal tip guides the follicular unit plug into the lumen; and

(c) removing the follicular unit plug from the donor area;

wherein the sharp scoring punch is disposed within the blunt dissecting punch lumen.

37. The method as recited in claim 36, wherein the first depth is not greater than about 1.5 mm.

38. The method as recited in claim 37, wherein the second depth is from about 4 mm to about 7 mm.

39. The method as recited in claim 36, wherein the removing step comprises removing the follicular unit plug using forceps.

40. The method as recited in claim 36, wherein the sharp scoring punch is retracted into the blunt dissecting punch lumen before the inserting step.