Claims
- 1. A process for inhibiting growth of hairs growing in hair ducts in a section of human skin comprising the steps of:
- a. contaminating said hairs or tissue feeding said hairs with a photosensitizer having a high absorption at at least one frequency band of light, which photosensitizer is applied topically to said skin section,
- b. illuminating said skin section with said light at said at least one frequency band within about 20 minutes to about 2 hours following said contaminating so as to cause a chemical reaction to destroy tissue maintaining life of hairs growing in at least a plurality of said hair ducts.
- 2. The process as in claim 1 wherein said photosensitizer is a solution of hematoporphyrin derivatives.
- 3. The process as in claim 2 wherein said frequency band of light is provided by an argon dye laser at 632 nm.
- 4. The process as in claim 3 wherein said solution is an approximately 20% solution.
- 5. A process for inhibiting growth of hairs growing in hair ducts in a section of human skin comprising the steps of:
- a. contaminating said hairs or tissue feeding said hairs with a photosensitizer having a high absorption at at least one frequency band of light;
- b. illuminating said skin section with said light at said at least one frequency band within about 3 to about 6 hours following said contaminating so as to cause a chemical reaction to destroy tissue maintaining life of hairs growing in at least a plurality of said hair ducts.
- 6. The process as in claim 5 wherein the contaminant is applied by oral ingestion.
- 7. The process as in claim 6 wherein said photosensitizer is a solution of disodium fluorescein.
- 8. The process as in claim 7 wherein said solution is at a concentration of about 2-5%.
- 9. The process as in claim 8 wherein said frequency band of light is provided by a Nd:YAG laser frequency shifted to about 532 nm.
- 10. The process as in claim 8 wherein said frequency band of light is provided by a HeCd laser.
- 11. The process as in claim 5 wherein the contaminant is applied intravenously.
- 12. The process as in claim 1 or 5 wherein said at least one frequency band is not readily absorbed in skin.
- 13. The process as in claim 1 or 5 wherein said frequency band of light is provided by a Er:Glass laser tripled to a wavelength of about 513 nm.
- 14. The process as in claim 1 or 5 wherein said frequency band of light is provided by a laser.
- 15. The process as in claim 14 wherein said laser produces light pulses having a pulse duration less than or equal to about 1 .mu.s.
- 16. The process as in claim 14 wherein said laser produces a beam size of about 1 cm.sup.2 to about 5 cm.sup.2.
- 17. The process as in claim 14 wherein said laser has a power level of about 5 J/cm.sup.2 to about 15 J/cm.sup.2.
Parent Case Info
This application is a continuation in part application of U.S. patent application Ser. No. 08/471,141, filed Jun. 6, 1995, now abandoned, which is a division of U.S. patent application Ser. No. 08/005,810, filed Jan. 19, 1993, now issued U.S. Pat. No. 5,425,728, which is a continuation application of U.S. patent application Ser. No. 07/783,789, filed Oct. 29, 1991, now issued U.S. Pat. No. 5,226,907.
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Divisions (1)
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Number |
Date |
Country |
Parent |
05810 |
Jan 1993 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
783789 |
Oct 1991 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
471141 |
Jun 1995 |
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