45 results about "Photocoagulations" patented technology

The present invention provides devices and methods for applying radiation to the retina of a patient. In one embodiment, an apparatus includes a radiation source for generating a radiation beam suitable for absorption by retinal pigment epithelial cells. One or more optical components are included to direct the beam onto the retina. A scanner is optically coupled to the radiation source to control movement of the beam in two dimensions to allow a scan over the retina. A controller applies control signals to the scanner to adjust beam movement to illuminate a plurality of retinal locations in a temporal sequence according to a predefined pattern. The device can be operated in one mode to effect selective targeting of retinal pigment epithelial cells, or in another mode to effect thermal photocoagulation of the retina.

A laser system that includes a diode pump source. A frequency doubled solid state visible laser is pumped by the diode pump source and produces a pulsed laser output with a train of pulses. Resources provide instructions for the creation of the pulsed output, with on and off times that provide for substantial confinement of thermal effects at a target site. This laser system results in tissue specific photoactivation (or TSP) without photocoagulation damage to any of the adjacent tissues and without causing full thickness retinal damage and the associated vision loss.

A surgical probe includes a cannula assembly, having a graded index (GRIN) fiber that is configured to receive a multi-spot light beam at a proximal end and to emit the multi-spot light beam at a distal end ; an adapter, having a distal end, configured to receive the cannula assembly, with the proximal end of the GRIN fiber, a proximal end, configured to couple to a light guide via a connector and to receive a light delivered by the light guide from a laser source to the adapter, and an interface, configured to couple the light delivered by the light guide to the proximal end of the GRIN fiber; wherein a length of the GRIN fiber is sufficiently long that the interface is outside a patient's eye during a photocoagulation procedure.

A surgical system includes a surgical laser source operable to emit a surgical laser beam and an OCT engine operable to emit an OCT beam. The surgical system also includes an endoprobe optically coupled to the surgical laser source and the OCT engine. The endoprobe includes an OCT fiber for transmitting the OCT beam, a surgical laser fiber for transmitting the surgical laser beam, and scanning optics optically coupled to the OCT fiber and the surgical laser fiber, the scanning optics configured to simultaneously scan both the OCT beam and the surgical laser beam. The surgical system further includes a processor programmed to control the scanning optics to scan the OCT beam and the surgical laser beam over a targeted tissue area and to detect an OCT signal from the targeted tissue area.

A device for photocoagulation of a retina includes a radiation source and an optical application system including a representation device configured to depict regions of the retina with sub-threshold coagulation. In addition a method for photocoagulation of the retina is provided.

A system and method are presented for treating branches of the superior hemorrhoidal artery by photocoagulation using laser energy. The inflamed dilated blood vessels in and around the anal region, often called hemorrhoids or piles, are caused due to a connective tissue disorder, a relative increase in pressure in the superior hemorrhoidal artery and a weakening of the vessels' valves. A suitable treatment system and a method are given for treating such conditions in a minimally invasive manner. The treatment system photocoagulates the branches of a superior hemorrhoidal artery in the anal and rectal regions using laser energy while causing minimal pain or discomfort to the patient. The system is provided with a transparent operational window. The distal end of the fiber and Doppler system channel are at the operational window. The system also includes a viewing window. The post operative recovery is faster than alternative approaches with no complications. In contrast to most other successful methods of the prior art, general anesthesia is no longer required, thereby significantly reducing complications and simplifying treatment.

A device intended to permit photocoagulation or phototherapy at low cost and in a shorter time. For this purpose, an ophthalmology appliance includes a radiation source having several discrete individual emitters. The therapy beam path leading from the radiation source to the treatment area projects an image of at least respective portions of different individual emitters simultaneously onto surfaces spaced apart from each other in the treatment area. This permits simultaneous generation of several coagulation foci and dispenses with the need for electromechanical beam-deflecting units, which permits a shorter treatment time.

An ophthalmologic photocoagulator and photoagulation method thereof in which visibility of sighting laser beam which is projected onto the eye fundus of an eye to be examined is improved and a loss in the amount of treatment laser beam can be reduced. The ophthalmologic photocoagulator includes: a treatment laser oscillator that oscillates a treatment laser beam for conducting treatment on a diseased part of the eye to be examined by photocoagulation; a sighting laser oscillator that oscillates a sighting laser beam for conducting sighting on the diseased part of the eye to be examined which is to be irradiated with the treatment laser beam; and a polarization beam splitter for combining an optical path of the treatment laser beam with an optical path of the sighting laser beam by polarization coupling. The treatment laser beam oscillating from the treatment laser oscillator and the sighting laser beam oscillating from the sighting laser oscillator have similar colors.

The present invention provides variable spot size illuminators that provide a light spot on a treatment plane by utilizing a zoom lens to direct light received from an image of a light source formed on an intermediate image plane onto the treatment plane. The zoom lens allows varying the size of the treatment spot while ensuring that the treatment spot exhibits parfocality. An illuminator of the invention can be utilized for performing a number of ophthalmic surgical procedures, such as, photocoagulation, transpupillary thermal therapy, and photodynamic therapy.

A method for treating the side effects resulting from ophthalmic lasery surgery of the eye. The method administers stem cells as a means for treating the destruction of retinal and other tissues resulting from photocoagulation in the treatment of diabetic retinopathy and other eye disorders. Methods for using the invention with other ophthalmic laser surgical procedures, and other eye disorders, are also disclosed.

The invention discloses an automatic light-changing welding goggles response characteristic testing system which comprises a white light source, a collimating lens, a sample, a sample stage, a photomultiplier, a triggering light source, an acquisition and control circuit, a computer, a stepping motor and a stepping motor driver; the same optical axis is provided with the white light source, the collimating lens, the sample stage, and the photomultiplier, the photomultiplier is connected with the acquisition and control circuit and the computer, the triggering light source is connected with the acquisition and control circuit and the computer, the sample is placed on the sample stage, the sample stage is provided with the stepping motor, and the stepping motor is connected with the stepping motor driver and the acquisition and control circuit. The invention adopts the movable sample stage, and can measure the response time of different positions of the light-changing welding goggles; the invention adopts the semiconductor light source as the triggering light source, and therefore only the quick modulation is implemented for the driving voltage of the light source, the pulse light intensity can be gained; the invention adopts a sleeve type spring device to press a laser on a detector of the sample in order to result in that the laser doesn't leak light.

A photocoagulation system is described herein that facilitates multi-spot laser treatment procedures inside the eye and close to the patient's retina. In one example embodiment, a modified endocular probe operates with a laser system to move the probe or a probe needle so as to project a multi-spot pattern on a patient's retina by controlling the rotation movement of the needle (and needle tip). In addition, the system facilitates maneuverability and angular deviation of the needle tip and synchronizes these different movements with the laser photocoagulator system so as to project the aiming beam and thereafter the laser treatment beam in the desired pattern location with the desired exposure time and power.

Systems and processes are described relating to laser-based ophthalmic intervention technologies and, more specifically, to techniques for delivering reproducible amounts of laser energy to create visible and sub-visible lesions on an eye. The subject technology may provide a user with the ability to adjust the amount of energy to be delivered to the eye tissue by selecting a single numerical value. In response, the system may adjust the power and/or duration of the laser treatment beam pulse according to an operating curve determined by the system.

The invention relates to a research method for the relation between a laser photocoagulation range and a diabetic retinopathy prognosis, the purpose of which is to provide an important control strategy for the timing and method of treating the diabetic retinopathy with laser by comparatively analyzing the relation between the laser photocoagulation range and the diabetic retinopathy prognosis. By comparing different laser modes in three months of laser treatment, the research method discovers that the visual field defect of a diseased eye is obviously caused by panretinal laser photocoagulation while the retinal function outside the macular region is protected by local retinal laser photocoagulation and quadrant laser photocoagulation. The research proves that the quadrant retinal laser photocoagulation carried out on the diseased region of the retina can remarkably improve the anoxic state of the retina, prevent the growth of new blood vessels on the retina and protect the visual function of the macular region.

The invention discloses a traditional Chinese medicine composition for treating central retinitis, which is prepared from the following raw materials in parts by weight: 10-40 parts of phaseolus calcaratus, 1-16 parts of rhizoma alismatis, 5-25 parts of poria, 1-16 parts of radix stephaniae tetrandrae, 2-22 parts of radix astragali, 5-25 parts of radix salviae miltiorrhizae, 1-20 parts of Chinese angelica, 1-20 parts of rhizoma atractylodis macrocephalae, 5-25 parts of earthworm, 1-20 parts of herba epimedii, 1-20 parts of cassia twig, 8-28 parts of caulis spatholobi and 1-13 parts of liquorice root. The traditional Chinese medicine composition disclosed by the invention has moderate property and good curative effect, and is used for treating central retinitis without laser photocoagulation.