Method and apparatus for therapeutic electromagnetic treatment

• US 6,174,325 B1
• Filed: 12/17/1997
• Issued: 01/16/2001
• Est. Priority Date: 10/20/1992
• Status: Expired due to Term

• Current Assignee: Lumenis Limited (Boston Scientific Corporation)
• Original Assignee: ESC Medical Systems, Ltd (Boston Scientific Corporation)
• Inventors: Eckhouse, Shimon
• Primary Examiner(s): Dvorak, Linda C. M.
• Assistant Examiner(s): GIBSON, ROY DEAN
• Application Number:
  US08/992,319
• Time in Patent Office: 1,126 Days
• Field of Search: 607/88, 607/90, 607/94
• US Class Current: 607/88
• CPC Class Codes: A61B 18/203 applying laser energy to the outside of the body
• CPC Class Codes: A61B 2017/00057 Light
• CPC Class Codes: A61B 2017/00172 Pulse trains, bursts, intermittent continuous operation
• CPC Class Codes: A61B 2018/00011 with fluids
• CPC Class Codes: A61B 2018/00029 open
• CPC Class Codes: A61B 2018/00452 Skin
• CPC Class Codes: A61B 2018/00458 Deeper parts of the skin, e.g. treatment of vascular disorders or port wine stains
• CPC Class Codes: A61B 2018/1807 using light other than laser radiation

Abstract

A therapeutic treatment device is disclosed and includes a housing and an incoherent light source such as a flashlamp disposed in the housing. The flashlamp provides a pulsed light output for treatment of external skin disorders. To provide light to the treatment area the housing has an opening that is disposed adjacent a skin treatment area. A reflector is mounted within the housing near proximate the light source to reflect the light to the treatment area. At least one optical filter and an iris are mounted near the opening in the housing. Power to the lamp is provided by a pulse forming circuit that can provide a variable pulse width.

Claims

1. A device for performing thermal therapy of at least one of the epidermis and dermis of a patient'"'"'s skin, comprising:

a source of light characterized by a combination of balanced optical parameters for a light output beam with the combination adjusted for a particular thermal therapy application;

a housing for said source of light and having a mirror disposed for collecting the light from said light source and said housing providing said output light beam without use of an optical fiber, said housing further including a collimator defining a large output area for said output light beam for applying thermal therapy to a large area of the patient'"'"'s skin relative to that of an optical fiber; and

a system for controlling said combination of balanced optical parameters with said combination selected from the group consisting of (a) light wavelength of said output light beam and pulse width in the range of about 10<sup>−

5</sup> sec to 10<sup>−

1</sup> sec, (b) energy density and light wavelength, (c) pulse width and energy density and (d) combinations of (a) and (b), and said combination of balanced optical parameters enabling achievement of a desired thermal heating protocol necessary to carry out thermal therapy treatment of at least one of the epidermis and the dermis of the patient'"'"'s skin.

2. The device as defined in claim 1 wherein the large output area has a maximum length dimension of about 5 cm.

3. The device as defined in claim 1 wherein said housing is disposed proximate the patient'"'"'s skin.

4. The device as defined in claim 1 wherein said light wavelength comprises a range of light wavelengths within a band region of about 300 nm to 1000 nm.

5. The device as defined in claim 1 wherein said energy density is in the range of about 0.5 J/cm² to 300 J/cm².

6. The device as defined in claim 1 wherein said housing further includes a variable size opening for said collimator.

7. The device as defined in claim 1 further including a light wavelength filter disposed along an optical path of said light output beam for controlling the light wavelength of said light output beam.

8. The device as defined in claim 1 wherein said light source comprises a broad wavelength flash lamp.

9. A device for performing thermal therapy of at least one of the epidermis and dermis of a patient'"'"'s skin, comprising:

a source of light for generating a light beam characterized by at least one optical parameter for a particular thermal therapy application;

a system for controlling said at least one characteristic optical parameter of said light source, said at least one characteristic optical parameter selected from the group consisting of light wavelength distribution, pulse width of the light wavelength distribution, energy density and combinations thereof, thereby allowing achievement of a desired optical condition for applying a thermal heating protocol to a particular portion of at least one of the epidermis and the dermis of the patient; and

a light source housing for receiving said light beam output from said light source and having an opening of large size such that said light beam is output for performing the thermal therapy over a large exposure area of the patient'"'"'s skin.

10. A device for performing thermal therapy of at least one of the epidermis and dermis of a patient'"'"'s skin, comprising:

a source of light for generating a light beam characterized by a plurality of balanced optical parameters with the parameters adjusted for a particular thermal therapy application;

a system for controlling said plurality of balanced optical parameters of said light beam, said plurality of balanced optical parameters selected from the group consisting of (a) light wavelength distribution and pulse width, (b) light wavelength distribution and energy density and (c) a combination of (a) and (b), said plurality of optical parameters thereby enabling achievement of a desired optical condition for applying a thermal heating protocol necessary to carry out thermal therapy treatment of at least one of the epidermis and the dermis of the patient'"'"'s skin; and

a light source housing for containment of said light beam and having an opening of large size comprising a collimator element of adjustable dimensions such that said light beam is output through the opening for performing the thermal therapy over a large exposure area of the patient'"'"'s skin.

11. The device as defined in claim 10 wherein the device does not include an optical fiber for outputting the light beam to the patient'"'"'s skin through the opening of the light source housing.

12. The device as defined in claim 10 further including a filter disposed along a path travelled by the light beam.

13. The device as defined in claim 10 further including a detector disposed outside the housing for sampling a portion of the output light beam.

14. The device as defined in claim 10 wherein a collimator element defines shape of the output light beam and is disposed proximal the patient'"'"'s skin.

15. A device for performing thermal therapy of at least one of the epidermis and dermis of a patient'"'"'s skin, comprising:

a source of light characterized by a combination of balanced optical parameters for a light output beam with the combination adjusted for a particular thermal therapy application;

a housing for containment of said source of light, said housing having a mirror disposed for collecting the light from said light source, and providing said output light beam without use of an optical fiber and said housing further including a collimator opening disposed in close proximity to the patient'"'"'s skin and defining a large area for said output light beam for applying thermal therapy to a large area of the patient'"'"'s skin; and

a system for controlling said combination of balanced optical parameters with said combination selected from the group consisting of (a) light wavelength and pulse width of said output light beam (b) energy density and light wavelength, (c) pulse width and energy density and (d) combinations of (a) and (b), and said combination of balanced optical parameters enabling achievement of a desired thermal heating protocol necessary to carry out therapeutic treatment of at least one of the epidermis and the dermis of the patient'"'"'s skin.

16. A device for performing thermal therapy on at least one of the epidermis and dermis of a patient'"'"'s skin, comprising:

a source of light characterized by a combination of balanced optical parameters for a light output beam with the combination adjusted for a particular thermal therapy treatment;

a housing for enclosing at least a portion of a path of travel of said light output beam generated by said source of light without use of an optical fiber, said housing including a collimator defining a opening in said housing through which said output beam passes and said housing being disposed proximate the patient'"'"'s skin for applying thermal therapy to a large area of the patient'"'"'s skin; and

a system for controlling said combination of balanced optical parameters with said combination selected from the group consisting of (a) light wavelength and pulse width of said output light beam (b) energy density and light wavelength, (c) pulse width and energy density and (d) combinations of (a) and (b), and said combination of balanced optical parameters enabling achievement of a desired thermal heating protocol necessary to carry out the therapeutic treatment of at least one of the epidermis and the dermis of the patient'"'"'s skin.

17. The device as defined in claim 16 wherein said collimator defines extreme light rays of said light output beam.

18. The device as defined in claim 16 wherein the large area of the a patient'"'"'s skin is defined by the collimator opening of maximum size 5 cm length by 5 mm width.

19. The device as defined in claim 16 wherein the source of light comprises an incoherent light source.

20. The device as defined in claim 16 further including a mirror disposed within the housing for coupling the light to the patient'"'"'s skin.

21. The device as defined in claim 20 wherein the collimator and the mirror cooperate to define intensity distribution incident on the patient'"'"'s skin.

22. The device as defined in claim 16 further including an optical filter which selectively removes light wavelengths from the output beam to control energy density incident on the patient'"'"'s skin.

23. The device as defined in claim 16 further including a detector disposed outside the housing for sampling a portion of the output beam.

24. The device as defined in claim 16 wherein the collimator is disposed proximal to and facing the patient'"'"'s skin to undergo the thermal therapy.

a system for controlling said at least one characteristic optical parameter of said incoherent light source, said at least one characteristic optical parameter selected from the group consisting of a light wavelength distribution between about 500 nm to 1000 nm, a pulse width of the light wavelength distribution of about 1 to 100 msec and an energy density, thereby allowing achievement of an optical condition for treating vascular lesions in the patient'"'"'s skin without burning of the skin.

25. A device for treating vascular lesions in a patient'"'"'s skin, comprising:

a housing containing an incoherent light source for generating an incoherent light beam characterized by at least one optical parameter for treating vascular lesions, said housing having an opening defining beam of small width relative to length; and

a system for controlling said at least one characteristic optical parameter of said incoherent light source, said at least one characteristic optical parameter elected from the group consisting of a light wavelength distribution between about 500 nm to 1000 nm, a pulse width of the light wavelength distribution of about 1 to 100 msec and an energy density, thereby allowing achievement of an optical condition for treating vascular lesions in the patient'"'"'s skin without burning of the skin.

26. The device as defined in claim 25 wherein the device does not include an optical fiber for defining at least part of a path of travel of the incoherent light beam.

27. The device as defined in claim 25 wherein the energy density is in a range of about 0.5 to 100 J/cm².

28. The device as defined in claim 25 further including a mirror disposed to collect light from the light source and outputting the light through a collimator in said housing.

29. A device for performing thermal therapy of at least one of the epidermis and dermis of a patient'"'"'s skin, comprising:

a source of light for generating a light beam characterized by a plurality of balanced optical parameters with the parameters adjusted for a particular thermal therapy application;

a system for controlling said plurality of balanced optical parameters of said light beam, said plurality of balanced optical parameters selected from the group consisting of (a) light wavelength distribution and pulse width, (b) light wavelength distribution and energy density and (c) a combination of (a) and (b), said plurality of optical parameters thereby enabling achievement of a desired optical condition for applying a thermal heating protocol necessary to carry out thermal therapy treatment of at least one of the epidermis and the dermis of the patient'"'"'s skin;

a light source housing for containment of said light beam and having an opening of large size such that said light beam is output through the opening for performing the thermal therapy over a large exposure area of the patient'"'"'s skin and

a detector disposed outside the housing for sampling a portion of the output light beam.

30. The device as defined in claim 29 wherein the device does not include an optical fiber for outputting the light beam to the patient'"'"'s skin through the opening of the light source housing.

31. The device as defined in claim 29 wherein the opening in the housing comprises a collimator element of adjustable dimensions.

32. The device as defined in claim 29 further including a filter disposed along a path traveled by the light beam.

33. The device as defined in claim 29 wherein a collimator element defines shape of the output light beam and is disposed proximal to the patient'"'"'s skin.

34. A device for performing thermal therapy of at least one of the epidermis and dermis of a patient'"'"'s skin, comprising:

a source of light for generating a light beam characterized by a plurality of balanced optical parameters with the parameters adjusted for a particular thermal therapy application;

a system for controlling said plurality of balanced optical parameters of said light beam, said plurality of balanced optical parameters selected from the group consisting of (a) light wavelength distribution and pulse width, (b) light wavelength distribution and energy density and (c) a combination of (a) and (b), said plurality of optical parameters thereby enabling achievement of a desired optical condition for applying a thermal heating protocol necessary to carry out thermal therapy treatment of at least one of the epidermis and the dermis of the patient'"'"'s skin;

a light source housing for containment of said light beam and having an opening of large size such that said light beam is output through the opening for performing the thermal therapy over a large exposure area of the patient'"'"'s skin; and

wherein a collimator element defines shape of the output light beam and is disposed proximal to the patient'"'"'s skin.

35. The device as defined in claim 34 wherein the device does not include an optical fiber for outputting the light beam to the patient'"'"'s skin through the opening of the light source housing.

36. The device as defined in claim 34 wherein said opening in the housing comprises a collimator element of adjustable dimensions.

37. The device as defined in claim 34 wherein the opening in the housing comprises a collimator element of adjustable dimensions.

38. The device as defined in claim 34 further including a filter disposed along a path traveled by the light beam.