US5336217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treatment by irradiating an area of a body, and treatment apparatus usable in dermatology for the treatment of cutaneous angio dysplasias
Assignee: Institut National de la Santé et de la Recherche Médicale
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Filing: 1992-06-05
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Granted: 1994-08-09
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Expires: 2012-06-05
Abstract
Abstract The invention relates to a process of treatment in the field of dermatology, for the treatment of cutaneous angio dysplasias, using the energy emitted by a laser source, as well as to an apparatus for the treatment of skin angiomas implementing the process. The apparatus includes a laser source suitable for supplying laser radiation, a treatment instrument for receiving the laser radiation from the source and whereby a plurality of consecutive laser shots is effected to form a plurality of resulting impacts on the area of the body to be treated. Following each shot, the area of the body thus treated has, at the resulting impact, at least a given relaxation time. The apparatus includes a support frame, an optical fiber disposed in the frame. The optical fiber has two ends, the first of the ends being suitable for connection to the laser source via the connecting means, the second end being mobile and suitable for generating a displaceable laser spot. An automatic control unit with memory controls in time and space sequential scanning of the second end of the optical fiber, and permits a sequence of consecutive laser shots such that two consecutive laser shots form two resulting impacts, which are not contiguous, if the time lapse between the two consecutive laser shots is less than the given thermal relaxation time, and the impacts of the different consecutive laser shots completely cover the surface through the contiguous juxtaposition of the different impacts resulting from the different laser shots.
Inventors
- 👤 Bruno Buys
- 👤 Jean-Pierre Sozanski
- 👤 Serge Mordon
- 👤 Jean-Marc Brunetaud
- 👤 Yves Moschetto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:35
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/02; A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/203; B23K26/08; B23K26/0869; B23K26/0876; B23K26/0884; A61B17/00; A61B2017/00017; A61B2017/00022; A61B2017/00057; A61B2018/00315; A61B2018/00452; A61B2018/00636; A61B2018/2035; A61B2018/20351; A61B2018/20357; A61N; A61N5/00; A61N5/06; A61N5/067
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
236 words
An apparatus for treating a region of tissue with a laser beam comprising: a handpiece, said handpiece including a means for supporting the handpiece at a fixed position on the tissue within the region to be treated; means for coupling the beam into the handpiece; guide means located within said handpiece for directing the beam to a spot on the tissue within the region to be treated; adjustment means coupled to said guide means for varying the position of the spot within the region to be treated while the handpiece remains at a fixed position on the tissue; and processor means for controlling the adjustment means to direct the spot to a series of nonoverlapping continuous positions covering the region to be treated, said processor means further controlling the beam to irradiate each position of the spot with an output, with the output at each spot having a predetermined duration and power and power wherein the tissue is not irradiated during the time the adjustment means varies the position of the spot and with the positions being selected so that if the time period between the delivery of the beam at two different positions is less than the thermal relaxation time of the tissue, then the distance between those two positions will be greater than the thermal diffusion distance thereby avoiding overheating of the tissue while minimizing the time period necessary for treating the entire region.
Claim 2
Independent Claim
236 words
An apparatus for treating a region of tissue with a laser beam comprising: a handpiece, said handpiece including a means for supporting the handpiece at a fixed position on the tissue within the region to be treated; means for coupling the beam into the handpiece; guide means located within said handpiece for directing the beam to a spot on the tissue within the region to be treated; adjustment means coupled to said guide means for varying the position of the spot within the region to be treated while the handpiece remains at a fixed position on the tissue; and processor means for controlling the adjustment means to direct the spot to a series of nonoverlapping continuous positions covering the region to be treated, said processor means further controlling the beam to irradiate each position of the spot with an output, with the output at each spot having a predetermined duration and power and power wherein the tissue is not irradiated during the time the adjustment means varies the position of the spot and with the positions being selected so that if the time period between the delivery of the beam at two different positions is less than the thermal relaxation time of the tissue, then the distance between those two positions will be greater than the thermal diffusion distance thereby avoiding overheating of the tissue while minimizing the time period necessary for treating the entire region.
Claim 3
Dependent Claim
17 words
An apparatus as recited in claim 1 wherein said region to be treated has a hexagon configuration.
Claim 4
Dependent Claim
40 words
An apparatus as recited in claim 1 wherein said guide means includes an optical fiber having an input end and a delivery end and wherein said adjustment means functions to translate the position of the delivery end of the fiber.
Claim 5
Dependent Claim
65 words
An apparatus as recited in claim 3 wherein said guide means further includes a lens optically aligned with the delivery end of the fiber and wherein the position of the delivery end of the fiber is translated in a plane parallel to plane of the lens and relative to the optical axis of the lens thereby adjusting the position of the spot on the tissue.
Claim 6
Dependent Claim
35 words
An apparatus as recited in claim 4 further including a shutter means controlled by said processor means and functioning to control the duration which the treatment beam is delivered at each position of the spot.
Claim 7
Dependent Claim
36 words
An apparatus as recited in claim 5 further including a means for measuring the power of the treatment beam delivered by said optical fiber and generating a control signal which is monitored by said processor means.
Claim 8
Dependent Claim
28 words
An apparatus as recited in claim 3 wherein said handpiece is configured so that the delivery end of said fiber is spaced from the tissue to be treated.
Claim 9
Independent Claim
191 words
A method of treating a region of tissue with a treatment beam from a laser source comprising the steps of: a) selecting a first spot within the region to be treated; b) irradiating the first spot with the beam for a predetermined time and at a predetermined energy; c) selecting a second spot within the region to be treated during which time the tissue is not being irradiated; d) irradiating said second spot with the beam for a predetermined time and at a predetermined energy, with said first spot not overlapping said second spot and wherein the position of the second spot is selected so that if the time period between the delivery of the beam at the first and second spots is less than the thermal relaxation time of the tissue, then the distance between those two spots will be greater than the thermal diffusion distance; and e) repeating steps (c) and (d) to irradiate additional nonoverlapping spots until the entire region has been treated with a pattern of contiguous spots such that overheating of the tissue is minimized while reducing the time period necessary for treating the entire region.
Claim 10
Independent Claim
191 words
A method of treating a region of tissue with a treatment beam from a laser source comprising the steps of: a) selecting a first spot within the region to be treated; b) irradiating the first spot with the beam for a predetermined time and at a predetermined energy; c) selecting a second spot within the region to be treated during which time the tissue is not being irradiated; d) irradiating said second spot with the beam for a predetermined time and at a predetermined energy, with said first spot not overlapping said second spot and wherein the position of the second spot is selected so that if the time period between the delivery of the beam at the first and second spots is less than the thermal relaxation time of the tissue, then the distance between those two spots will be greater than the thermal diffusion distance; and e) repeating steps (c) and (d) to irradiate additional nonoverlapping spots until the entire region has been treated with a pattern of contiguous spots such that overheating of the tissue is minimized while reducing the time period necessary for treating the entire region.
References Cited (Backward Citations)
US4069823A
Cited
FR2357008A1
Cited
US4266548A
Cited
EP0130950A2
Cited
US4580557A
Cited
US4672969A
Cited
US4653495A
Cited
EP0172490A1
Cited
US4733660A
Cited
US4750486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-08 | 1998-02-07 | 1998-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-08 | 2002-02-07 | 2002-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-08 | 2006-02-07 | 2006-08-09 | $7700.00 | Window Closed / Lapsed |