About LIGHTLas 577
LIGHTMED’s LIGHTLas 577 is in true-yellow 577nm with continuous (CW) and sp-mode™ modality. This machine has superior power output that produces 2.0W at every spot size. The LIGHTLas 577 has yellow wavelength that has optimum absorption by oxyhemoglobin that results in safer, more controllable, and faster treatment with very little patient discomfort and better post-op recovery. Also as a result of low light scatter and peak oxyhemoglobin absorption, typically 50% less power is required to achieve the same therapeutic effects as with the conventional green laser photocoagulation. The yellow wavelength in the laser also increases the safety margins for macular treatment which allows a much closer approach to fovea then the traditional 532nm laser.
LIGHTMED’s LIGHTLas 577 also features an sp-mode™function (also known as Sub-threshold Photocoagulation Mode ) that offers a novel and revolutionary approach in treatment of numerous retinal disorders with far greater safety margins and versatility of continuous wavelength lasers. The sp-mode™ delivers trains of short micro pulses, enhance treatment flexibility, and safety that is ideal for treatments near the macula. This modality is not a replacement of continuous wavelength, but a viable complement that demonstrates high efficacy on a large number of clinical applications that far exceeds those of conventional lasers.
The LIGHTLas 577 uniquely integrates with our ultra high quality slit lamp. LIGHTMED’s slit lamp has out- standing clinical functionality. Having 50-1000µm continuously variable spot size, the delivery system has enhanced clinical verstility superb energy density. Our slit lamp comes with an internal safety filter for a large field undistorted and a crystal clear view of the retina. Also the LIGHTLas 577 conviently can also become a combo or tri laser, connecting with our LIGHTLas YAG, LIGHTLas SLT or LIGHTLas SLT Duex. This causes an increase in practice clinical scope and an efficiency integrated work station. The LIGHTLas 532 also comes with a wireless power control foot pedal that allows for enhanced procedures and an advance detachable 7″ LCD touch screen interface with intuitive menus and treatment settings.
|Laser System||OPSL True CW & sp-mode|
|Safety Classification||Class 4|
|Power Output||50mW – 2.0W (continuously variable SmartControl™ Increments)|
|Max Power at Cornea||2.0W (Endo LIO & SLA at all spot sizes)|
|Pulse Duration||0.01 – 3.0s|
|Pulse Intervals||0.01 – 3.0s & Continuous|
|sp-mode™ settings||Duration: 150µs-600µs (50µs increments) sp-mode Duty Cycle: 5%-30% (2.5% increments) Period: 1400µs-18500µs (50µs increments)|
|Cooling||Auto Fan & TEC's for Laser & Crystal|
|Treatment Spot Size||50 – 500µm Continuously Variable or Stepped 50 – 1000µm Continuously Variable (Integrated Version)|
|Aiming Beam||Laser diode 635-650nm red 0.1 – < 1mW|
|Dimensions (laser console)||13cm(H) x 36cm(W) x 33cm (D) 5.1" x 14.5" x 12.9"|
|Weight (system)||12Kg / 26 lb|
|Power Requirements||100‐230 VAC 50-60 Hz Auto ranging|
Features and Benefits
Superb Performance from High Duty Laser Solution
The all-new digitally controlled instant-duty cycle allows fast speed and high power usage over prolonged periods.
Innovative laser cavity engine and high quality optical design assure accurate power deliver and precise energy distribution across all delivery devices resulting in safer controllable treatment.
The innovative laser technology and quality optics of the laser and delivery systems, assure accurate power delivery and precise energy distribution for all delivery devices. LIGHTLas 577 produces excellent spot size precession with highly accurate energy density over the treatment area.
The all-new digitally controlled instant-duty cycle circuitry allows ultra fast laser energy feedback loop that monitors each shot and instantly adjusts for stable output, enhancing treatment safety and clinical outcomes.
Unique Slit Lamp Integrated Option for Enhanced Workflow
Unlike contemporary integrated lasers, the LIGHTLas laser console can be easily used with LIO or removed and utilized with Endo probes in O.R making it a very functional and friendly integrated system.
- The 50-1000µm continuously variable, parfocal spot size control provides superb energy density and increases clinical versatility.
- The internal safety filters allow larger field of view, and undistorted clear sight of the retina.
- The working distance between the binocular and patient is short facilitating accommodation and ease.
- Enhanced working distance from objective lens and the patient’s eye increases comfort to accommodate laser lens and precision during the procedure.
Ergonomic optional motorized table with swivel plate for convenient laser use and height adjustable padded arm rests.
The LIGHTLas 577 features a large 7″ color LCD touch panel, featuring user-friendly in-built PC with programmable and intuitive menu settings in all room conditions.
The windows embedded platform was designed to be customizable for future input of data and progressive product upgrades.
The conveniently detachable control panel enhances working space and offers easy access to all laser controls.
Tissue Friendly sp-mode™ Photocoagulation
LIGHTLas 577 can be used in traditional Continuous Wavelength (CW) and sp-mode (Sub-Threshold Photocoagulation) treatment modalities allowing conventional and next-gen approach in management of Retinal and Glaucoma disease.
The sp-mode is the latest evolution in LightMed laser photocoagulators offering a novel approach to achieve optimum clinical outcomes whilst eliminating laser-induced thermal tissue damage and treatment side effects. This technology allows for a broader range of treatment modalities with ongoing studies demonstrating that physicians may now treat disorders at a much earlier stage, with possibility of repeat treatment in retinal and glaucoma applications.
Wireless Foot Pedal with Power Control Function
This foot pedal also allows for adjustment of treatment power settings by foot using the side switches.
The ergonomic design allows for a hands-free operation and an uninterrupted procedure for increased visual focus.
- Laser provides audible alerts during energy adjustment by foot assuring adequate attention span during procedure.
- Wireless Design reduces cable clutter.
- Ultra long-life battery assuring minimum 7 year operating time (also provided with standard cable in case of battery failure).
YAG & SLT Adaptation for Enhanced Space and Value
The combination assures optimum with the efficiency of an integrated laser station. In addition, it lowers the cost of ownership and assures increased practice and clinical scope.
The photocoagulator treatment laser is delivered through an attachment type delivery system that conveniently mounts on the LIGHTLas YAG without affecting its core performance, whether the Laser console can be conveniently located on especially designed swivel plate for enhanced functionality or mounted on the side column for enhanced space.
Extensive Range of Delivery Devices
The LIGHTLas 577 comes with an extensive range of laser delivery devices assuring maximum utility of economics, space, and clinical needs. Auto-Key for automatic recognition of safety filters and delivery devices assures simple and safe selection of treatment modes.
Slit Lamp Delivery Adapters (SLA)
- Designed to fit Zeiss and Haag-Streit and types of slit lamps.
- Delivery Attachments for combination use with LightMed and other brand YAG & SLT lasers.
- True Parfocal 50-50oµm continuously variable spot size producing excellent and uniform power density distribution over the treatment area.
- Optional micromanipulator option for enhanced spot position controls, enabling quick and easy treatment in painting mode.
- Superior Optics and safety filter allows enhanced and undistorted view of the retina.
Keeler Integrated Laser Indirect Ophthalmoscope (LIO)
- Unique controls of aperture and spot size.
- Comfortable light weight design.
- Superior optics and integrated safety filter for enhanced viewing.
Full range of Endo-ocular Laser probes
- Wide variety of LIGHTMED’s exclusive and affordable probes for vast majority of vitreo-retinal needs.
- Available in 20G, 23G and 25G models:
- Straight Probes
- Angled Probes
- Aspirating Probes
- Illuminating Probes
Convenient, Versatile and Portable Design
The LIGHTLas 577 has been designed to serve in Operating Room, Clinic and Office environments with ease, comfort and superb clinical performance.
- The Integrated configuration facilitates better diagnosis, enlarged peripheral viewing and enhances speed of procedure and ease of use in treatment of various retinal disorders.
- The optional on-Cart solution assures easy transportation from clinic or O.R environment enhancing better utility of the product investment and use with numerous delivery devices.
- The Laser + attachment configuration maximize economies of scale allowing to utilize the LIGHTLas 577 laser with already existing slit lamps or to create a powerful multi-use workstation maximizing cost and space efficiency.
Advantages of 577nm Wavelength
The 577nm Yellow laser possesses the highest absorption level for retinal haemoglobin when compared to green and red wavelengths.
The yellow 577nm wavelength exhibits many common characteristics to the green 532nm wavelength, and is suitable to per‐ form all procedures of the 514nm (argon) & 532nm, including iridotomy and laser tra‐ beculoplasty, providing that sufficient power is available (as many yellow laser photocoagulators presently in the market are unable to produce adequate output power. Hence mainly the reason for tri‐ wavelength lasers).
With its characteristic penetration depth, it offers an efficient and smooth alternative to sealing retinal vessels. It also more effec‐ tively penetrates inhomogeneous media such as moderate cataracts.
However, the true yellow 577nm wave‐ length, offers the many additional advantages such as being effective at lower energy levels, improved patient comfort, less light scatter and less phototoxicity.
Compared to the green 532nm , the yellow exhibits similar high absorption in melanin and in haemoglobin, which allows for pro‐ duction of visible lesions with low energy settings. However it also makes it more effective for the treatment of vascular structures.
When treating inside the macular pigment area, yellow creates a more predictable, controlled burn than traditional 514/532nm green wavelengths, resulting in lower scotoma formation.
The physician has more precise control over the interaction between the laser beam and tissue, and can create a visible laser burn with less power and thus less injury to surrounding tissues than with the green wavelength.
Use of the yellow wavelength is also
more comfortable for patients because there is less lateral as well as less axial spread of thermal energy. Because the yellow wavelength is well absorbed, the power and duration can be decreased and thus the patient is more comfortable.
As the yellow wavelength is longer there is less scatter, which provides for better transmission through lens opacities. As a result, yellow can be used effectively to treat through lenses with nuclear cata‐ racts – using reduced energy levels.
There are a number of other instances in which the yellow wavelength is superior to the 514/532nm green wavelengths. Yellow is ideal for treating clinically significant diabetic macular oedema and juxtafoveal and extrafoveal choroidal neovascularization, as well as to perform grid pattern laser in eyes with branch retinal vein occlusion. In addition, given the high absorption of yellow in melanin, it can be considered in the treatment of some eyes with chronic central serous retinopathy because the lack of yellow laser uptake by xanthophyll protects the fovea.
The yellow wavelength has also demon‐ strated itself as the better suited for feed‐ er laser photocoagulation in eyes with retinal angiomatous proliferans.
The yellow 577nm is the new gold standard to treat near the macula.
- Peak absorption in oxyhaemoglobin
- Negligible absorption by xanthophyll pigments.
- Low light scattering
- Safe near the macula.
- Useful for treating abnormal vasculature.
- Reduced treatment pain.
Main Clinical Applications
- Proliferative Diabetic Retinopathy
- Diabetic macular Edema
- Occlusion of the branches and central retinal vein.
- Occlusion of the branches and central retinal artery
- Pan Retinal Photocoagulation
- Retinal Tears, Holes & Detachments
- Laser Trabeculoplasty
- Laser Iridotomy
- Peripheral Iridectomy
- Sub-Threshold Photocoagulation Laser Trabeculoplasty (spLT)
This technique is always used in the surgical environment as a final stage of Vitrectomy. Endophotocagulation is used for its retinopexy when treating detachments, and for applying pan-retinal photocoagulation (PRP) in the eye of a patient with diabetic retinopathy, usually in the severe proliferate stages.
Endophotocoagulation of retinal detachments:
In the retinal detachment surgery, endophotocoagulation is used to place a series of burns along the outside edge of a tear or hole after the retina has been returned to its normal position. This will prevent the migration of fluid under the edge of the tear or through the hole to lift the retina off again.
Endophotocoagulation of diabetic retinopathy:
In the final stages of a Vitrectomy, usually to remove the consequence of hemorrhage, a PRP is performed as if it were being done using the slit lamp. The treatment may include up to 300 applications, but is often less, if the patient has had previous outpatient PRP.
The ophthalmologists complete the PRP during the surgery, because many of these cases will have some additional haemorrhage. It is more practical to treat with the laser in while there is little or no haemorrhage present.
Tips for using the Endoprobe:
- A 4x increase in power density is obtained for each millimetre the probe tip is moved closer to the retina.
- It may be better to use longer working distances with higher powers. This allows the doctor to adjust the burn endpoint by moving the probe closer or further back from the retina.
- When the doctor is applying laser in air, lower power is required.
- When it is difficult to achieve a burn, very often there is fluid under the retina. Often after draining again good burns are obtained.
- It is best to have grey endpoints; they will become lighter after a few minutes. This avoids over treatment.