WO1997045163A1 - Reduction of vascular blemishes by selective thermolysis - Google Patents
Reduction of vascular blemishes by selective thermolysis Download PDFInfo
- Publication number
- WO1997045163A1 WO1997045163A1 PCT/GB1997/001411 GB9701411W WO9745163A1 WO 1997045163 A1 WO1997045163 A1 WO 1997045163A1 GB 9701411 W GB9701411 W GB 9701411W WO 9745163 A1 WO9745163 A1 WO 9745163A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- beams
- radiation
- laser radiation
- laser
- vascular
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
- A61B18/203—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser applying laser energy to the outside of the body
-
- 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
- A61B2017/00756—Port wine stains
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
- A61B2018/00452—Skin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
- A61B2018/00452—Skin
- A61B2018/00458—Deeper parts of the skin, e.g. treatment of vascular disorders or port wine stains
Definitions
- the present invention relates to a method and apparatus for cosmetic reduction of vascular skin blemishes by means of thermolysis using laser irradiation
- Vascular irregularities below the surface of the skin can cause visible skin blemishes such as the conditions commonly referred to as Portwine stains, Naevus, Telangiectasia, Strawberry Haemangioma and Thread veins. It has become common practice to cosmetically reduce and preferably remove such vascular blemishes using techniques known as selective thermolysis in which pulsed laser light of a pre-selected wavelength incident on and passing through the skin of a patient is specifically absorbed by a target vascular irregularity lesion leading to "coagulation necrosis" which results in a cosmetic normalising of the colour or tint of the visible blemish with the surrounding skin.
- selective thermolysis in which pulsed laser light of a pre-selected wavelength incident on and passing through the skin of a patient is specifically absorbed by a target vascular irregularity lesion leading to "coagulation necrosis" which results in a cosmetic normalising of the colour or tint of the visible blemish with the surrounding skin.
- a flash lamp pumped dye laser has been utilised emitting light at a wavelength of between 570nm - 600nm at typical output energy levels of 5 - 15 J/cm 2 with pulse durations in the range 100 - 600 micro-seconds.
- thermolysis In known selective thermolysis techniques, only a relatively small proportion of the volume of individual blood vessels (depending on the size of the vessels, which can be from 5 microns to 2mm) comprising the vascular irregularity lesion is heated to thermolysis temperature during the laser pulse. The thermolysis effect is therefore limited to a localised volume of the blood vessels and reduces the probability of the blemish being removed by the treatment.
- the invention seeks to alleviate the above- mentioned difficulty.
- the invention provides a method of cosmetically reducing a vascular blemish at or below the surface of mammalian skin, which method comprises directing laser radiation to converge toward said blemish from a plurality of different directions, thereby to cause selective thermolysis of blood vessels comprising said vascular blemish.
- the directed laser radiation is arranged to converge below the surface of the skin. Irradiating the vascular blemish from a plurality of different directions rather than from a single direction only (usually normal to the skin) as with conventional thermolysis techniques, causes a larger volume of individual vessels comprising the vascular blemish to be heated, thereby increasing the average vessel temperature and hence increasing the likelihood of complete or substantial removal of the blemish.
- a plurality of substantially linear paths of radiation are provided, each preferably comprising a separate beam, being arrange to converge toward the vascular blemish.
- the respective paths or beams are angularly spaced relatively to one another.
- one of the beams or paths is directed normally to the skin of the patient at least one further beam or path being directed at an inclined angle relative to the skin of the patient.
- the laser radiation is directed to converge from the plurality of different directions effectively simultaneously.
- the directed radiation is pulsed preferably having a pulse duration in the range 100 to 600 micro ⁇ seconds.
- the laser radiation may comprise a primary beam which is split into a plurality of individual beams which are subsequently directed to converge on the vascular blemish.
- separate beams may be used, each from a separate source. It is preferred that the laser radiation converging from the plurality of directions is of the same wavelength (and preferably the same intensity) from each direction. Each of the converging laser beams are therefore effectively identical.
- laser apparatus for use in selective thermolysis techniques, the apparatus comprising means for directing a laser radiation to converge from a plurality of different directions at a zone of convergence spaced from the apparatus.
- the apparatus is arranged to produce a plurality of beams each directed along a respective substantially linear path, the beams being angularly spaced from one another to converge at the zone of convergence.
- the beams are arranged to be of substantially the same wavelength, and also preferably of substantially the same intensity.
- apparatus may comprise division means for dividing the plurality of laser beams from a primary beam.
- the division means preferably comprises optical means which may include mirrors and/or beam splitters and/or optical prisms.
- focusing means is provided to focus each beam at the convergence zone.
- the focusing means comprises a focusing lens.
- modification means is provided to modify the configuration of the beams for example by providing that the focusing means is arranged to focus the respective beam to a line rather than a point or spot.
- An at least partially cylindrical optic lens is preferably provided for this purpose.
- laser apparatus for use in selective thermolysis techniques and comprising focusing means arranged to focus a laser beam to a line is inventive per se. This is particularly useful where the target blemish for photothermolysis is substantially linear such as, for example, a thread vein.
- the apparatus may comprise discrete laser sources arranged to produce each respective laser beam.
- pulsation means is provided to pulse the laser radiation.
- Figure 1 is a schematic representation of a prior art photothermolysis technique
- Figure 2 is a schematic representation of the method according to the invention.
- FIG. 3 is a schematic representation of an embodiment of apparatus according to the invention.
- Figure 4 is a schematic representation of a component suitable for use in an embodiment of the apparatus of Figure 3.
- thermolysis techniques utilise a uni-directional beam 1 of laser radiation aimed in a direction substantially normal to the surface of the skin 2 and impinging on a sub-cutaneous blood vessel 3 comprising a general region 4 of vascular irregularity such as a Portwine stain, Strawberry Haemangioma or the like.
- the laser radiation incident on vessel 3 heats a relatively small peripheral volume 5 of the vessel to the thermolysis temperature which leaves a substantial volume of the vessel insufficiently heated and therefore the vascular blemish is not entirely removed.
- the technique according to the invention utilises three discrete beams 7, 8, 9 of laser radiation passing through the surface of the skin 2 at different inclinations and arranged to converge on vessels 3 in the region 4 of the vascular irregularity.
- This has the benefit of ensuring that a larger peripheral volume 5a of the vessel 3 is heated to thermolysis temperature and thereby ensures more complete removal of the vascular blemish.
- the beams 7, 8, 9 of radiation are superposed only in the region 4 of the vascular irregularity, the high intensity needed for thermolysis is restricted to that region because each individual beam may be of lower intensity radiation. This prevents over heating and thermal damage being caused to tissue outside region 4.
- FIG. 3 shows apparatus suitable for use in reducing a vascular blemish in accordance with the invention.
- the apparatus comprises a laser source 10, beam splitters 11, 12 (each arranged to transmit 66% and reflect 33% of incoming radiation) and mirror reflectors 13, 14 arranged to divide the primary beam 14 into three beams 15, 16, 17 which are focused by lenses 18 to converge below the surface of the skin 2.
- the beams 15, 16, 17 may be modified by means of a cylinder optic lens 18a (shown in Figure 6) to produce a line of focus 19 rather than a point or spot as with conventional optics. This is particularly useful for use in removing elongate blemishes such as thread veins.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/194,528 US6605083B2 (en) | 1996-05-29 | 1997-05-23 | Reduction of vascular blemishes by selective thermolysis |
AU29100/97A AU2910097A (en) | 1996-05-29 | 1997-05-23 | Reduction of vascular blemishes by selective thermolysis |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9611170.3 | 1996-05-29 | ||
GBGB9611170.3A GB9611170D0 (en) | 1996-05-29 | 1996-05-29 | Reduction of vascular blemishes by selective thermolysis |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997045163A1 true WO1997045163A1 (en) | 1997-12-04 |
Family
ID=10794440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1997/001411 WO1997045163A1 (en) | 1996-05-29 | 1997-05-23 | Reduction of vascular blemishes by selective thermolysis |
Country Status (5)
Country | Link |
---|---|
US (1) | US6605083B2 (en) |
AU (1) | AU2910097A (en) |
GB (1) | GB9611170D0 (en) |
WO (1) | WO1997045163A1 (en) |
ZA (1) | ZA974729B (en) |
Cited By (1)
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---|---|---|---|---|
WO1998043704A1 (en) * | 1997-04-02 | 1998-10-08 | Wound Healing Of Oklahoma, Inc. | Laser light delivery system and method |
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US6517532B1 (en) | 1997-05-15 | 2003-02-11 | Palomar Medical Technologies, Inc. | Light energy delivery head |
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US7354448B2 (en) | 2001-11-29 | 2008-04-08 | Palomar Medical Technologies, Inc. | Dental phototherapy methods and compositions |
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US20050055070A1 (en) * | 2003-03-07 | 2005-03-10 | Gareth Jones | Method and device for treatment of skin conditions |
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US7856985B2 (en) | 2005-04-22 | 2010-12-28 | Cynosure, Inc. | Method of treatment body tissue using a non-uniform laser beam |
AU2006292526A1 (en) | 2005-09-15 | 2007-03-29 | Palomar Medical Technologies, Inc. | Skin optical characterization device |
US20070093892A1 (en) * | 2005-10-20 | 2007-04-26 | Alcon Manufacturing, Ltd. | Maintaining preoperative position of the posterior lens capsule after cataract surgery |
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US9919168B2 (en) | 2009-07-23 | 2018-03-20 | Palomar Medical Technologies, Inc. | Method for improvement of cellulite appearance |
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US10285757B2 (en) | 2013-03-15 | 2019-05-14 | Cynosure, Llc | Picosecond optical radiation systems and methods of use |
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WO2019165426A1 (en) | 2018-02-26 | 2019-08-29 | Cynosure, Inc. | Q-switched cavity dumped sub-nanosecond laser |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987004632A1 (en) * | 1986-02-03 | 1987-08-13 | Carl-Zeiss-Stiftung, Handelnd Als Carl Zeiss | Device for therapeutical irradiation of organic tissue by laser radiation |
WO1988000072A1 (en) * | 1986-06-30 | 1988-01-14 | Medical Laser Research Co., Ltd. | Semiconductor laser therapeutic apparatus |
EP0320080A1 (en) * | 1987-11-13 | 1989-06-14 | Omega Universal Limited | Device for biostimulation of tissue |
EP0429297A2 (en) * | 1989-11-20 | 1991-05-29 | Hamamatsu Photonics K.K. | Cancer diagnosis and treatment device having laser beam generator |
EP0443033A1 (en) * | 1989-09-08 | 1991-08-28 | S.L.T. Japan Co, Ltd. | Device for irradiating laser beams |
WO1991013652A1 (en) * | 1990-03-14 | 1991-09-19 | Candela Laser Corporation | Apparatus for treating abnormal pigmentation of the skin |
DE4131968A1 (en) * | 1991-09-25 | 1993-04-01 | Rodenstock Instr | OPTICAL SYSTEM FOR COUPLING LASER BEAM SOURCES |
NL9300064A (en) * | 1993-01-13 | 1994-08-01 | Spectranetics Corp | Method for obtaining a homogeneous light distribution (HLD) in intravascular irradition with laser light, as well as laser catheter to be used in this method, and procedure for the manufacture thereof |
WO1996025979A1 (en) * | 1995-02-24 | 1996-08-29 | Grigory Borisovich Altshuler | Device for use in the laser treatment of biological tissue (variants thereof) |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4518232A (en) * | 1983-08-24 | 1985-05-21 | Avco Everett Research Laboratory, Inc. | Method and apparatus for optical beam shaping |
EP0165060B1 (en) | 1984-06-13 | 1991-09-04 | Fuji Photo Film Co., Ltd. | Semiconductor laser beam scanning device |
IL75998A0 (en) | 1984-08-07 | 1985-12-31 | Medical Laser Research & Dev C | Laser system for providing target tissue specific energy deposition |
EP0284330A1 (en) | 1987-03-23 | 1988-09-28 | EASTMAN KODAK COMPANY (a New Jersey corporation) | Two-laser therapy and diagnosis device |
US4973848A (en) | 1989-07-28 | 1990-11-27 | J. Mccaughan | Laser apparatus for concurrent analysis and treatment |
GB2242307B (en) | 1990-02-09 | 1994-09-07 | Omega Universal Tech Ltd | Laser probe for biomodulation of tissue nerve and immune systems |
US5292320A (en) * | 1992-07-06 | 1994-03-08 | Ceramoptec, Inc. | Radial medical laser delivery device |
US5287380A (en) | 1993-02-19 | 1994-02-15 | Candela Laser Corporation | Method and apparatus for generating long output pulses from flashlamp-excited lasers |
FR2709657B1 (en) * | 1993-09-07 | 1995-12-01 | Deemed Int Sa | Optical designation device, in particular for microsurgery operation. |
AU1380095A (en) | 1994-01-21 | 1995-08-08 | Erik Larsen | Device for stimulating body cells by electromagnetic radiation |
US5505726A (en) * | 1994-03-21 | 1996-04-09 | Dusa Pharmaceuticals, Inc. | Article of manufacture for the photodynamic therapy of dermal lesion |
US5586981A (en) * | 1994-08-25 | 1996-12-24 | Xin-Hua Hu | Treatment of cutaneous vascular and pigmented lesions |
US5746735A (en) * | 1994-10-26 | 1998-05-05 | Cynosure, Inc. | Ultra long pulsed dye laser device for treatment of ectatic vessels and method therefor |
US5599342A (en) | 1995-01-27 | 1997-02-04 | Candela Laser Corporation | Method for treating pigmentation abnormalities using pulsed laser radiation with an elongated cross-section and apparatus for providing same |
US5746738A (en) * | 1996-11-20 | 1998-05-05 | Cleary & Oxford Associates | Laser surgical device |
US6379347B1 (en) * | 1998-05-28 | 2002-04-30 | Terumo Kabushiki Kaisha | Energy irradiation apparatus |
-
1996
- 1996-05-29 GB GBGB9611170.3A patent/GB9611170D0/en active Pending
-
1997
- 1997-05-23 US US09/194,528 patent/US6605083B2/en not_active Expired - Fee Related
- 1997-05-23 WO PCT/GB1997/001411 patent/WO1997045163A1/en active Application Filing
- 1997-05-23 AU AU29100/97A patent/AU2910097A/en not_active Abandoned
- 1997-05-29 ZA ZA974729A patent/ZA974729B/en unknown
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987004632A1 (en) * | 1986-02-03 | 1987-08-13 | Carl-Zeiss-Stiftung, Handelnd Als Carl Zeiss | Device for therapeutical irradiation of organic tissue by laser radiation |
WO1988000072A1 (en) * | 1986-06-30 | 1988-01-14 | Medical Laser Research Co., Ltd. | Semiconductor laser therapeutic apparatus |
EP0320080A1 (en) * | 1987-11-13 | 1989-06-14 | Omega Universal Limited | Device for biostimulation of tissue |
EP0443033A1 (en) * | 1989-09-08 | 1991-08-28 | S.L.T. Japan Co, Ltd. | Device for irradiating laser beams |
EP0429297A2 (en) * | 1989-11-20 | 1991-05-29 | Hamamatsu Photonics K.K. | Cancer diagnosis and treatment device having laser beam generator |
WO1991013652A1 (en) * | 1990-03-14 | 1991-09-19 | Candela Laser Corporation | Apparatus for treating abnormal pigmentation of the skin |
DE4131968A1 (en) * | 1991-09-25 | 1993-04-01 | Rodenstock Instr | OPTICAL SYSTEM FOR COUPLING LASER BEAM SOURCES |
NL9300064A (en) * | 1993-01-13 | 1994-08-01 | Spectranetics Corp | Method for obtaining a homogeneous light distribution (HLD) in intravascular irradition with laser light, as well as laser catheter to be used in this method, and procedure for the manufacture thereof |
WO1996025979A1 (en) * | 1995-02-24 | 1996-08-29 | Grigory Borisovich Altshuler | Device for use in the laser treatment of biological tissue (variants thereof) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998043704A1 (en) * | 1997-04-02 | 1998-10-08 | Wound Healing Of Oklahoma, Inc. | Laser light delivery system and method |
US6099554A (en) * | 1997-04-02 | 2000-08-08 | Wound Healing Of Oklahoma | Laser light delivery method |
Also Published As
Publication number | Publication date |
---|---|
AU2910097A (en) | 1998-01-05 |
US20020013578A1 (en) | 2002-01-31 |
US6605083B2 (en) | 2003-08-12 |
GB9611170D0 (en) | 1996-07-31 |
ZA974729B (en) | 1998-08-25 |
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