Therapeutic laser system operating between 1000nm and 1300nm and its use

• US 6,503,268 B1
• Filed: 04/03/2000
• Issued: 01/07/2003
• Est. Priority Date: 04/03/2000
• Status: Expired due to Fees

• Current Assignee: CeramOptec Industries Incorporated (Biolitec AG)
• Original Assignee: CeramOptec Industries Incorporated (Biolitec AG)
• Inventors: Schwarzmaier, Hans-Joachim, Neuberger, Wolfgang
• Primary Examiner(s): Peffley, Michael
• Assistant Examiner(s): Vrettakos, Peter J
• Application Number:
  US09/541,953
• Time in Patent Office: 1,009 Days
• Field of Search: 606/2, 606/3-16, 607/88-89, 607/92
• US Class Current: 607/89
• CPC Class Codes: A61B 18/22 the beam being directed along or through a flexible conduit, e.g. an optical fibre; Couplings or hand-pieces therefor
• CPC Class Codes: A61B 2017/00084 Temperature
• CPC Class Codes: A61B 2018/00005 Cooling or heating of the probe or tissue immediately surrounding the probe
• CPC Class Codes: A61B 2018/2211 Plurality of fibres
• CPC Class Codes: A61N 2005/0659 infrared
• CPC Class Codes: A61N 5/0601 Apparatus for use inside the body
• CPC Class Codes: A61N 5/062 Photodynamic therapy, i.e. excitation of an agent
• CPC Class Codes: A61N 5/067 using laser light

Abstract

Laser systems medical or cosmetic applications, comprising diode lasers or diode lasers with other solid state lasers which can deliver up to 30 cw or more, and which generally operate at more than wavelength within the range of 1000 to 1300 nm are presented. Individual emitter or emitter groups within the diode laser system can be powered independently. These laser systems provide maximum penetration depths for procedures such as Laser-induced Interstitial Tumor Therapy, alone or in conjunction with other therapies such as PhotoDynamic Therapy, chemotherapy, or radiation therapy. Where beneficial for the procedure, the operating wavelength of the system can be changed without interruption. In some variants, active tissue cooling at the distal end of the delivery fibers is incorporated as well as individual feedback loops to control and stabilize the temperature induced in the tissue. To enhance thermal or photo effects and thereby increase efficiencies, absorbers can be administered and the laser system tuned to the specific absorption band of the absorber.

Claims

1. A medical or cosmetic therapeutic treatment in the thermal regime using a diode laser system comprising at least one laser diode emitter operating at a wavelength between 1000 nm and 1300 nm and emitting sufficient power to thermally destroy tumors and at least one means to optically transmit said emissions to a treatment site, comprising the steps of:

selecting said treatment from a group consisting of coagulating, denaturing and shrinking tissue; and

administering said treatment in combination with a chemotherapy treatment.

2. A medical or cosmetic therapeutic treatment according to claim 1, further comprising pretreatment steps of:

administering an absorber; and

tuning said laser system to a specific absorption band of said absorber.

3. A medical or cosmetic therapeutic treatment according to claim 1, further comprising a step of:

varying said emission wavelength selectively within a specified range without interrupting said therapeutic treatment.

4. A medical or cosmetic therapeutic treatment according to claim 1, further comprising a step of:

providing active treatment site cooling during said treatment.

5. A medical or cosmetic therapeutic treatment according to claim 1, further comprising a step of:

controlling and stabilizing induced temperature at said treatment site by means of a feedback loop associated with each emitter(emitter group).

6. A medical or cosmetic therapeutic treatment in the thermal regime using a diode laser system comprising at least one laser diode emitter operating at a wavelength between 1000 nm and 1300 nm and emitting sufficient power to thermally destroy tumors and at least one means to optically transmit said emissions to a treatment site, comprising the steps of:

administering an absorber;

tuning said laser system to a specific absorption band of said absorber;

selecting said treatment from a group consisting of coagulating, denaturing and shrinking tissue; and

administering said treatment in combination with a radiation therapy treatment.

7. A medical or cosmetic therapeutic treatment according to claim 6, further comprising a step of:

varying said emission wavelength selectively within a specified range without interrupting said therapeutic treatment.

8. A medical or cosmetic therapeutic treatment according to claim 6, further comprising a step of:

providing active treatment site cooling during said treatment.

9. A medical or cosmetic therapeutic treatment according to claim 6, further comprising a step of:

controlling and stabilizing induced temperature at said treatment site by means of a feedback loop associated with each emitter(emitter group).