[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO2009123635A1 - Appareil de prélèvement de cheveux - Google Patents

Appareil de prélèvement de cheveux Download PDF

Info

Publication number
WO2009123635A1
WO2009123635A1 PCT/US2008/059192 US2008059192W WO2009123635A1 WO 2009123635 A1 WO2009123635 A1 WO 2009123635A1 US 2008059192 W US2008059192 W US 2008059192W WO 2009123635 A1 WO2009123635 A1 WO 2009123635A1
Authority
WO
WIPO (PCT)
Prior art keywords
punch
hollow punch
hair
skin
fluid
Prior art date
Application number
PCT/US2008/059192
Other languages
English (en)
Inventor
William Rassman
Jae Pak
Original Assignee
William Rassman
Jae Pak
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by William Rassman, Jae Pak filed Critical William Rassman
Priority to PCT/US2008/059192 priority Critical patent/WO2009123635A1/fr
Publication of WO2009123635A1 publication Critical patent/WO2009123635A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/3205—Excision instruments
    • A61B17/32053—Punch like cutting instruments, e.g. using a cylindrical or oval knife
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/3203—Fluid jet cutting instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00017—Electrical control of surgical instruments
    • A61B2017/00137—Details of operation mode
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00743—Type of operation; Specification of treatment sites
    • A61B2017/00747—Dermatology
    • A61B2017/00752—Hair removal or transplantation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/32—Surgical cutting instruments
    • A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
    • A61B2017/320082—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic for incising tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/36—Image-producing devices or illumination devices not otherwise provided for
    • A61B90/361—Image-producing devices, e.g. surgical cameras
    • A61B2090/3614—Image-producing devices, e.g. surgical cameras using optical fibre

Definitions

  • This invention relates to hair harvesting apparatus and more particularly to apparatus for extracting single follicular units from a harvesting area of the skin.
  • a patch of skin is excised from the rear area of a scalp and the scalp is then sutured. This patch is then dissected under a microscope and hair follicular units are isolated. The process is slow, tedious, exacting and expensive. It would be advantageous to develop a hair graft harvesting technique which would permit the removal of individual hair grafts from a harvesting area of a scalp or hair bearing skin. Not only would such a technique expedite hair graft harvesting and reduce cost, it also would eliminate the surgical procedure of excising a patch of skin and the attending suturing.
  • Patent No. 6,572,625 demonstrates a mechanism for alignment of hair follicles within a follicular unit so that the follicular unit can be extracted, one follicular unit (FU) at a time.
  • the 6,572,625 patent sets up a situation where a hollow punch with a sharp or dull cutting edge can be used to remove the follicular unit with reduced damage of cutting or amputating the follicles in the FU with perfect alignment.
  • a punch is introduced to surround the FU, the hollow tube gathers the hair follicles as it is advanced deeper into the scalp or hair bearing skin(a distance of about 5 -7mm).
  • the anatomy of a follicular unit is not cylindrical in its normal undisturbed state, in vivo.
  • the hairs of the FU grow in groups of one, two, threes, and four hairs.
  • the hairs of the FU exit at the skin surface in close proximity to one another.
  • the hairs of the FU sometimes diverge and cone out in the dermal and fatty layer beneath the skin. Hairs of the FU have a maximal divergence at the location of the bulb.
  • the hair follicles are connected to stroma (collagen fibrils) which forms a lattice work of supporting structures, forming a framework holding the hair follicles in place and connecting the hair follicles to the surrounding fat and blood vessels.
  • This fibrous framework is made up of collagen and the nature of the collagen varies from person to person. Some collagen fibrils are elastic and some inelastic. These inherent characteristics of the FU make the extraction of the FU uniquely variable on an individual basis.
  • the amount of elastic fibrils is disproportionably high in number, while in other individuals they it is disproportionably low in numbers.
  • the hollow punch easily 'gathers' the hair follicles as it is advanced into the deeper fat, probably tearing at the supporting stroma and breaking it apart.
  • the cutting or breaking of these elastic fibrils occurs easily as the hair follicles advance into the descending hollow punch.
  • the elastic fibrils are few in number and the inelastic fibrils are high so that the hair and the surrounding structures do not easily cut or tear as the hollow punch is advanced.
  • the point of greatest weakness may be the hair shafts and the hair shaft is either cut or torn apart, damaging the FU as attempts are made to remove it.
  • the extraction of the follicular unit is a mechanical process and it is heavily influenced by mechanical factors related to the stroma that support each and every hair follicle.
  • the results of these anatomical variations make extraction of each hair follicle variable on an individual and even local (different areas of the skin) basis. Variations in successful extraction of hairs within an FU often produce unacceptable variation in the success of FU Extraction.
  • SUMMARY The invention is based on the realization that the extraction of individual hair follicular units from a harvest area of the hair bearing skin could be improved by a mechanism which assists an advancing hollow punch as it moves into the hair bearing skin around a target follicular unit.
  • Such an assist is provided by applying vibrational energy to the punch as it advances or by cutting the collagen fibrils about the advancing punch preferably by a water jet scalpel controlled to follow an annular path along the annular distal surface of the punch.
  • a channel is provided in the wall of the punch.
  • a source of water is coupled to the channel and a pump, under the control of the operator, generates a water jet at the distal surface of the punch.
  • the water jet follows a circular path as the punch rotates upon entry into the skin.
  • a punch with a sharp distal end has been found often to result in the extraction of damaged grafts a consequence which is avoided by a dull punch with an auxiliary instrumentation to separate inelastic collagen fibrils which resist extraction.
  • Fig. 1 is a schematic representation of a graft extraction punch in accordance with the principles of this invention
  • Fig. 2 is an enlarged end view of the punch of fig. 1.
  • Fig. 3 is a system block diagram for the operation of the punch of fig. 1;
  • Fig. 4 is a schematic representation of an alternative graft extraction punch in accordance with the principles of this invention.
  • Fig. 1 is a schematic side view of a punch for extracting hairgrafts from a hair bearing skin in accordance with the principles of this invention.
  • Fig. 2 is an enlarged view of the distal end of the punch of fig. 1.
  • Fig. 3 is a schematic system diagram of apparatus 10 operative for extracting single follicular unit hair grafts from a hair bearing skin in accordance with the principles of this invention.
  • the apparatus comprises a hollow punch 11 of fig. 1 with a channel 12 journalled into the wall of the punch exiting at the distal end 13 as shown in fig. 2.
  • a second punch 14 is positioned coaxially with respect to the axis of punch 11.
  • Punch 14 has a diameter just larger than the footprint made by the hair of a follicular unit exiting the hair bearing skin.
  • Punch 14 has a sharp distal end and punch 11 has a dull distal end.
  • the punches are free to move individually along the common axis but conveniently are coupled to one another.
  • Punch 11 is secured to a positioning device 30 for aligning punch 11 with a target hair graft for extraction.
  • the positioning device is operative under the control of a controller which conveniently comprises a computer 31.
  • An imaging device such as an optical fiber 32 is positioned to capture the image of target grafts as is disclosed in U.S. Patent No. 6,572,625, issued June 3, 2003 and also in co pending patent application Hair Extraction Device and Method for its Use filed Aug. 3, 2006. The image is displayed on monitor 34 of computer 31.
  • the positioning device is positioned to move punch 11 about the surface of a hair bearing skin 35 as indicated in fig. 1.
  • An operator observes an image on monitor 34 and selects a target graft. Both punch 11 and Punch 14 are now properly positioned for excising a hair graft.
  • the operator activates the positioning assembly to advance Punch 14 to penetrate or score the skin at the target site. Punch 14 is then withdrawn.
  • the operator then activates the positioning device to move punch 11 into the hair bearing skin and to rotate punch 11 as it advances.
  • the advance of the punch may be controlled to be limited to a depth of approximately 7 mm by the position of a shoulder 36 positioned to abut the hair bearing skin surface when the maximum penetration is reached.
  • the rotation of the advancing punch is indicated by curved arrow 37 in fig. 3. This rotation may be cycled or oscillated in the clockwise and counter-clockwise direction for optimal effect, conveniently controlled by the controller (31).
  • Channel 12 in punch 11 is connected to fluid source 40 to supply fluid to the channel.
  • the pressure, pulse frequency and pulse duration are determined by pump 41 also conveniently controlled by the controller (31).
  • the number of rotations or oscillations of the punch also is controlled by the controller.
  • the diameter of the punch is selected to be slightly larger than a follicular unit which is approximately 0.7 mm and the diameter of the channel 12 typically range 120 microns or less
  • an advancing punch (11) with micro water jet stream under a pressure of up/to (but not limited to) 150 bar with or without pulsations rotating along the perimeter of the punch may be sufficient to achieve successful dissection and extraction of the most resistant grafts in a single rotation.
  • the punch with an inner diameter of approximately 0.8mm to 1.0mm, typically has a dull distal end but it may also have a sharp cutting edge. In either case, a micro water jet increases the success rate of undamaged graft extraction.
  • Fig. 4 shows an alternative embodiment where a vibratory device is attached to a punch and activated as the punch is (rotationally) advanced about a target follicular unit.
  • fig. 4 shows a punch 50 illustratively with a shoulder 51 with a transducer 52 coupled to the punch.
  • the transducer is activated when an operator activates a positioning assembly for advancing the punch into the hair bearing skin at a target graft.
  • the vibration of the punch produces successful extraction of undamaged grafts and may be implemented by an ultrasonic micro-vibration device such as those used in electric tooth brushes or those used in dental offices.
  • controller 31 is adapted to move punch 14 into the scalp or skin in a manner to pierce the skin and to then withdraw the punch.
  • the punch may be fixed to the interior wall of another hollow punch 11 by attachment arms or by a nest of telescoping tubes operative to move punch 14 along the z axis when hollow punch 11 is positioned at a target graft.
  • the telescoping tubes may be operative to move punch 14 along the coaxial path in response to the rotation of the outermost cylinder of the nest.
  • the rotation of the outermost cylinder is produced conveniently by a belt (not shown) coupled to a reversible motor under the control of the controller such as 31 of Fig. 3.
  • punch 14 may not be necessary.
  • punch 11 is rotated or oscillated relatively slowly to allow the fluid jet to cut the soft tissue surrounding a target graft to lesser the damage which typically is caused by the sharp cutting edge.
  • the rotation of the punch may be achieved by a worm gear, a belt arrangement, manual rotation, or a mechanical attachment.
  • the shoulder (36) may be adjustable along the coaxial path of the punch and pre-positioned prior or even during a set of extraction procedures.
  • the imaging instrumentation may be implemented by a high power video camera, computer assisted visual system, or direct visualization along with or instead of the optical fiber illustrated.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

L'extraction d'une greffe de cheveux à partir d'une zone de prélèvement d'un cuir chevelu utilise un poinçon creux doté d'une instrumentation auxiliaire pour séparer une greffe cible de fibrilles de collagène qui résistent à l'extraction. Un jet d'eau qui suit le trajet annulaire du poinçon à mesure qu'il tourne dans le cuir chevelu est décrit, ainsi qu'un autre mode de réalisation de poinçon vibrant pour obtenir la séparation désirée.
PCT/US2008/059192 2008-04-02 2008-04-02 Appareil de prélèvement de cheveux WO2009123635A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2008/059192 WO2009123635A1 (fr) 2008-04-02 2008-04-02 Appareil de prélèvement de cheveux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2008/059192 WO2009123635A1 (fr) 2008-04-02 2008-04-02 Appareil de prélèvement de cheveux

Publications (1)

Publication Number Publication Date
WO2009123635A1 true WO2009123635A1 (fr) 2009-10-08

Family

ID=41135870

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/059192 WO2009123635A1 (fr) 2008-04-02 2008-04-02 Appareil de prélèvement de cheveux

Country Status (1)

Country Link
WO (1) WO2009123635A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8998931B2 (en) 2011-10-17 2015-04-07 Pilofocus, Inc. Hair restoration
US9314082B2 (en) 2009-09-17 2016-04-19 Pilofocus, Inc. System and method for extraction of hair follicle
US9364252B2 (en) 2009-09-17 2016-06-14 Pilofocus, Inc. Hair restoration surgery
US9693799B2 (en) 2009-09-17 2017-07-04 Pilofocus, Inc. System and method for aligning hair follicle
US11045306B1 (en) 2020-08-31 2021-06-29 Boudjema-Rassman Partnership Automated staging of hair grafts

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5782851A (en) * 1996-04-10 1998-07-21 Rassman; William R. Hair transplantation system
US6572625B1 (en) * 1998-09-13 2003-06-03 William R. Rassman Hair transplant harvesting device and method for its use
US20060161179A1 (en) * 2004-12-23 2006-07-20 Kachenmeister Robert M Follicular transplantation device and method
US20080033455A1 (en) * 2006-08-03 2008-02-07 Rassman William R Hair extraction device and method for its use

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5782851A (en) * 1996-04-10 1998-07-21 Rassman; William R. Hair transplantation system
US6572625B1 (en) * 1998-09-13 2003-06-03 William R. Rassman Hair transplant harvesting device and method for its use
US20060161179A1 (en) * 2004-12-23 2006-07-20 Kachenmeister Robert M Follicular transplantation device and method
US20080033455A1 (en) * 2006-08-03 2008-02-07 Rassman William R Hair extraction device and method for its use

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9314082B2 (en) 2009-09-17 2016-04-19 Pilofocus, Inc. System and method for extraction of hair follicle
US9364252B2 (en) 2009-09-17 2016-06-14 Pilofocus, Inc. Hair restoration surgery
US9693799B2 (en) 2009-09-17 2017-07-04 Pilofocus, Inc. System and method for aligning hair follicle
US8998931B2 (en) 2011-10-17 2015-04-07 Pilofocus, Inc. Hair restoration
US9861386B2 (en) 2011-10-17 2018-01-09 Pilofocus, Inc. Hair restoration
US11045306B1 (en) 2020-08-31 2021-06-29 Boudjema-Rassman Partnership Automated staging of hair grafts

Similar Documents

Publication Publication Date Title
US9420866B1 (en) Hair harvesting apparatus
US5217459A (en) Method and instrument for performing eye surgery
US6572625B1 (en) Hair transplant harvesting device and method for its use
US20110144638A1 (en) Localized Shockwave-Induced Tissue Disruption
JP6074422B2 (ja) 接眼レンズ切断装置
US3659607A (en) Method for performing surgical procedures on the eye
US9259236B1 (en) Hair harvesting device and method with localized subsurface dermal fluid insertion
EP3212138B1 (fr) Sonde de vitrectomie à dispositif de balayage à fibres optiques
EP0921763B1 (fr) Aiguille de phaco-emulsification
US5176677A (en) Endoscopic ultrasonic rotary electro-cauterizing aspirator
US3528425A (en) Apparatus for performing surgical procedures on the eye
DE68916339T2 (de) Vorrichtung zur Entfernung des grauen Stars.
US20080033455A1 (en) Hair extraction device and method for its use
WO2009123635A1 (fr) Appareil de prélèvement de cheveux
WO2014082093A1 (fr) Dispositif d'extraction aux ultrasons d'unités folliculaires et procédé associé
DE2605968A1 (de) Vorrichtung fuer chirurgische zwecke
US10434012B2 (en) Posterior capsulotomy using laser techniques
JP2008194457A (ja) 超音波処置装置
JP2003534049A (ja) 低周波数の白内障破砕装置
JP2010510841A (ja) 脊柱の最小侵襲処置装置および方法
US9867636B2 (en) Method, apparatus, and a system for a water jet
Lipshitz et al. Cutting the cornea with a waterjet keratome
US20130226042A1 (en) Ultrasonic Treatment Method and Apparatus with Active Pain Suppression
KR20100023419A (ko) 의료용 자동 트위스트 천공기 시스템 및 의료용 천공기
JP2018117975A (ja) 細径内視鏡手術器具

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08744969

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205 DATED 10.12.2010)

122 Ep: pct application non-entry in european phase

Ref document number: 08744969

Country of ref document: EP

Kind code of ref document: A1