Laser Photocoagulation
Laser Photocoagulation - Related Videos
09:51
Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators
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Cited by 9 •
2018
Practicing the specific skills required for fetoscopic laser coagulation of monochorionic placental anastomoses on realistic models can aid less experienced surgeons in overcoming the steep learning curve associated with this procedure that is now regarded as the standard of care for twin-twin transfusion syndrome.
06:34
Laser-Induced Chronic Ocular Hypertension Model on SD Rats
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Cited by 26 •
2007
Glaucoma is one of the major causes of blindness in the world. Elevated intraocular pressure is a major risk factor. Laser photocoagulation induced ocular hypertension is one of the well established animal models. This video demonstrates how to induce ocular hypertension by Argon laser photocoagulation in rat.
07:00
A Laser-induced Mouse Model of Chronic Ocular Hypertension to Characterize Visual Defects
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Cited by 26 •
2013
Chronic ocular hypertension is induced using laser photocoagulation of the trabecular meshwork in mouse eyes. The intraocular pressure (IOP) is elevated for several months after laser treatment. The decrease of visual acuity and contrast sensitivity of experimental animals are monitored using the optomotor test.
14:18
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Cited by 2 •
2016
A protocol to detect and automate mode locking in a pre-adjusted nonlinear polarization rotation fiber laser is presented. The detection of a sudden change in the output polarization state when mode locking occurs is used to command the alignment of an intra-cavity polarization controller in order to find mode-locking conditions.
09:59
An “All-laser” Endothelial Transplant
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Cited by 5 •
2015
An all laser procedure is proposed in the endothelial transplant. The surgical technique is based on the use of a femtosecond laser to prepare the donor tissue. Laser welding technique is then used to secure the donor endothelium in the correct position.
FAQs
The chosen wavelength determines which pigmented molecules absorb the delivered energy and where heat is generated. Absorption converts light energy into thermal energy, raising the temperature in the exposed region. This wavelength-dependent interaction helps clinicians target abnormal vessels or retinal areas while limiting injury to nearby tissue that absorbs less energy.
Outcome depends on power, exposure time, wavelength, and tissue properties. Changing these variables alters how much energy tissue receives and how strongly its temperature rises. The balance must provide enough heating to denature proteins and seal vessels, without extending thermal injury beyond the intended treatment area.
Controlled thermal damage matters because coagulation can alter tissue function without requiring an incision. In retinal treatment, protein denaturation helps seal vessels and reduce fluid leakage or bleeding. Precision depends on concentrating light in the selected region, while exposure conditions determine whether the effect remains localized instead of producing widespread tissue injury.
A basic procedure begins by selecting a laser wavelength suited to the tissue interaction, focusing the light on the intended area, and controlling power and exposure time. The delivered energy is absorbed by pigmented molecules and converted to heat. This sequence raises temperature enough to produce planned coagulation while limiting collateral damage.
It is used for abnormal blood vessels and selected retinal disorders. By sealing vessels, treatment can reduce retinal fluid leakage and manage bleeding; it can also destroy or limit abnormal tissue growth. These applications show how the same light-tissue mechanism supports different outcomes depending on the retinal problem and treatment target.
The technique provides a way to study how light interacts with tissue and how cells respond to localized thermal injury. Researchers examine both the initial damage, including protein denaturation, and subsequent repair processes. This biological context helps connect treatment parameters with tissue outcomes and supports investigation of cellular injury and recovery.