CA2330029A1 - Method of selective photothermolysis - Google Patents

Method of selective photothermolysis Download PDF

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Publication number
CA2330029A1
CA2330029A1 CA002330029A CA2330029A CA2330029A1 CA 2330029 A1 CA2330029 A1 CA 2330029A1 CA 002330029 A CA002330029 A CA 002330029A CA 2330029 A CA2330029 A CA 2330029A CA 2330029 A1 CA2330029 A1 CA 2330029A1
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CA
Canada
Prior art keywords
electromagnetic radiation
source
target
skin
narrowband
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002330029A
Other languages
French (fr)
Other versions
CA2330029C (en
Inventor
Zion Azar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Radiancy Inc
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Individual
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 Individual filed Critical Individual
Publication of CA2330029A1 publication Critical patent/CA2330029A1/en
Application granted granted Critical
Publication of CA2330029C publication Critical patent/CA2330029C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • A61B2017/00022—Sensing or detecting at the treatment site
    • A61B2017/00057—Light
    • 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
    • A61B2017/00154—Details of operation mode pulsed
    • 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
    • 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
    • A61B2018/1807—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 light other than laser radiation

Abstract

A method and device for selective photothermolysis of a surgical target with in surrounding tissue. The target and the surrounding tissue are heated to abou t 60 ~C. Then the target is heated to the point of coagulation, preferably by monochromatic light. The temperature difference between the coagulating targ et and the surrounding tissue is sufficiently mild that heat diffusing out of t he target does not damage the surrounding tissue, even in the case of a relatively large target such as varicose veins.

Claims (24)

1. A method of selective photothermolysis of a target within surrounding tissue, comprising the steps of:
(a) heating the target and the surrounding tissue together above normal body temperature; and (b) heating the target further to between about 70°C and about 80°C.
2. The method of claim 1, wherein said heating of the target and the surrounding tissue together above normal body temperature is to a temperature of between about 55°C and about 65°C.
3. The method of claim 1, wherein said heating of the target and the surrounding tissue together above normal body temperature is effected by using electromagnetic radiation.
4. The method of claim 3, wherein said electromagnetic radiation is microwave radiation.
5. The method of claim 3, wherein said electromagnetic radiation is pulsed.
6. The method of claim 5, wherein said electromagnetic radiation is generated by a source including at least one lamp.
7. The method of claim 6, wherein said pulsing is effected using a mechanism including at least one shutter.
8. The method of claim 1, wherein said further heating of the target is effected by using pulsed, substantially monochromatic electromagnetic radiation.
9. The method of claim 8, wherein said electromagnetic radiation is characterized by a wavelength of between about 570 nanometers and about 610 nanometers.
10. The method of claim 8, wherein said electromagnetic radiation is generated by a laser.
11. The method of claim 8, wherein said electromagnetic radiation is generated by a system including:
(a) at least one lamp; and (b) a mechanism for wavelength selection.
12. The method of claim 11, wherein said mechanism for wavelength selection includes at least one filter.
13. The method of claim 11, wherein said mechanism for wavelength selection includes at least one monochrometer.
14. Apparatus for selective photothermolysis of a skin target tissue, the apparatus comprising:
a pulsable heat source which heats the skin target tissue and skin surrounding the target tissue; and a pulsable source of narrowband electromagnetic radiation which irradiates the skin with narrowband electromagnetic radiation to selectively heat said target tissue as compared to said surrounding tissue.
15. Apparatus according to claim 14 wherein the pulsable heat source forms a temperature gradient in the air between the source and the skin.
16. Apparatus according to claim 14 wherein said heat source comprises a source of broadband electromagnetic radiation which heats the skin.
17. Apparatus according to claim 16 wherein said source of broadband electromagnetic radiation comprises a laser.
18. Apparatus according to claim 16 wherein said source of broadband electromagnetic radiation comprises a microwave source.
19. Apparatus according to any of the preceding claims wherein said narrowband source comprises a pulsed substantially monochromatic source of electromagnetic radiation.
20. Apparatus according to claim 19 wherein said narrowband electromagnetic radiation has a wavelength of between about 570 and 610 manometers.
21. Apparatus according to claim 19 wherein said narrowband source comprises:
a lamp; and a mechanism for wavelength selection.
22. Apparatus according to claim 21 wherein said mechanism for wavelength selection comprises at least one filter.
23. Apparatus according to claim 21 wherein said mechanism for wavelength selection comprises at least one monochrometer.
24. Apparatus according to claim 14 and including:
a controller unit which controls said heat source and said source of narrowband electromagnetic radiation, for coordinating a sequence of activation of said heat source and said source of electromagnetic radiation.
CA2330029A 1996-09-04 1998-04-30 Method of selective photothermolysis Expired - Fee Related CA2330029C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/707,562 US5759200A (en) 1996-09-04 1996-09-04 Method of selective photothermolysis
PCT/US1998/008657 WO1999056824A1 (en) 1996-09-04 1998-04-30 Method of selective photothermolysis

Publications (2)

Publication Number Publication Date
CA2330029A1 true CA2330029A1 (en) 1999-11-11
CA2330029C CA2330029C (en) 2012-08-07

Family

ID=26794099

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2330029A Expired - Fee Related CA2330029C (en) 1996-09-04 1998-04-30 Method of selective photothermolysis

Country Status (11)

Country Link
US (1) US5759200A (en)
EP (1) EP1079895A4 (en)
JP (1) JP4153165B2 (en)
CN (1) CN1193805C (en)
AU (1) AU748623B2 (en)
BR (1) BR9815839A (en)
CA (1) CA2330029C (en)
EA (1) EA002506B1 (en)
IL (2) IL139336A0 (en)
MX (1) MXPA00010474A (en)
WO (1) WO1999056824A1 (en)

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Also Published As

Publication number Publication date
IL139336A (en) 2008-11-03
IL139336A0 (en) 2001-11-25
EP1079895A4 (en) 2005-06-22
EA002506B1 (en) 2002-06-27
AU748623B2 (en) 2002-06-06
AU7169598A (en) 1999-11-23
BR9815839A (en) 2000-12-26
CN1193805C (en) 2005-03-23
EP1079895A1 (en) 2001-03-07
CN1299295A (en) 2001-06-13
WO1999056824A1 (en) 1999-11-11
JP4153165B2 (en) 2008-09-17
JP2002513658A (en) 2002-05-14
EA200001132A1 (en) 2001-04-23
CA2330029C (en) 2012-08-07
US5759200A (en) 1998-06-02
MXPA00010474A (en) 2002-10-17

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