Surgery – Instruments – Light application
Patent
1992-10-07
1994-06-14
Pellegrino, Stephen C.
Surgery
Instruments
Light application
606 11, 606 3, 606 16, A61B 1736
Patent
active
053206185
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a device for treating telangiectasis and the like afflictions such as capillary hemangroma (red birthmarks).
PRIOR ART AND PROBLEM
It is known today that telangiectasis can be removed by means of a laser. By directing the laser beam in a prescribed way against the superficial affliction that is to be treated a such aesthetically disturbing affliction can be completely eliminated in that the laser beam burns away the cellular tissue that gives rise to the affliction. On the market today a plurality of different devices are available for carrying out such a treatment mentioned above. One common aspect for all available devices is a high price. This high price depends on the fact that the laser beam devices as such require part components which are very costly. The high price for the device results in its turn in that the availability of the treatment method is relatively low as this gives rise to relatively few devices on the market and that each treatment will be relatively expensive.
THE SOLUTION AND ADVANTAGES
The object of the present invention is to bring about a device that eliminates the above mentioned problems and which accordingly results in a high accessibility to the above described treatment method.
Said object has surprisingly been obtained by means of a device according to what has been stated in claim 1.
DESCRIPTION OF THE FIGURES
The invention will be further described in the following with reference to the attached drawings in which:
FIG. 1 shows principally the construction of a device according to the invention,
FIG. 2 shows a preferred embodiment in a perspective view,
FIG. 3 shows a cross-section along the line I--I in FIG. 2,
FIG. 4 shows parts of a longitudinal section through the device according to FIG. 2, and
FIG. 5 shows a cross-section through an alternative middle pipe.
FIG. 1 shows the principle construction of a device according to the invention. Thus, a spherical reflector 1 is shown, within which a lamp 2 is arranged. The lamp is of a high efficient type, suitably a so-called arc-lamp. The reflector has a reflecting inner surface 10 and an opening 11 for the outgoing rays. The outgoing rays converge towards a fixed point where a first lens 3 is arranged. The lens 3 is of a convex type that converts the conveying rays to parallel light. The parallel beam of rays is thereafter directed into a device 6 which by filtration brings about a desired area of wave lengths. Such a device can for example be a monochromator 6 or a filter 6. The ray beam coming out of the device 6 is fed into a fibre optical cable 4. Via fibre optical cable 4 the rays are conducted forward to a second lens 5 which is arranged at the outer end of the fibre optical cable 4. The end 50 of this second lens 5 is intended to be directed towards the superficial part of a human body that is to be treated.
To obtain the best possible result the light source is in the preferred embodiment an arc-lamp which has an effect peak of about 585 nm. This wavelength will vary over an interval of + or -10% , or preferably + or -5%, about the peak wavelength in the band. Preferably a converging reflector 1 having an inner surface 10 which maximizes the reflection of rays having a wave length about 585 nm is used. Further in the preferred embodiment the second lens 5 shall be so arranged that the beam of rays and the exit from the lens has a diameter of 0.5-5 mm preferably 3 mm. If, however, effect at the desired area of wave length is comparatively low it is preferred to further minimize the diameter of the ray beam coming from the second lens 5.
The light is in its preferred embodiment consisting of pulses having a duration of 450 microseconds (also continuous light can be used). The pulses can either be produced directly in the lamp or at a later stage along the way of the beams by means of a mechanical or electronic closure. The length of the pulse can, in its extreme case, be so low as 15 microseconds (1.5.times.10.sup.-10) however, suitably in the interval 50 mic
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patent: 4860172 (1989-08-01), Schlager et al.
International Publication No. WO 89/00871 Apparatus for Irradiating by Polarised Light 22 Jul. 1988, Katona et al.
Harris Sonya
Pellegrino Stephen C.
Renz Jr. Eugene E.
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