Gelasert

Gelasert is a term used in photonics to describe a class of laser systems that utilize a gel interface to couple laser energy into biological tissue. The gel acts as an optical coupling medium, reducing reflections at the tissue surface and providing transient cooling to minimize thermal injury. The design typically combines a gel layer with a compact laser source and a handpiece that maintains a controlled gel-tissue interface.

The term gelasert emerged in the scientific literature in the 2010s as researchers explored methods to improve energy delivery and patient comfort in laser therapy. Gel formulations are chosen for biocompatibility, optical transparency at the laser wavelength, and appropriate rheological properties to ensure uniform contact.

In practice, a thin gel layer is applied to the treatment area and spread with a rigid or flexible window, while the laser delivers energy through the gel into the tissue. The system may incorporate temperature monitoring and feedback control to adjust fluence, pulse duration, and repetition rate.

Potential applications include dermatologic laser therapies such as resurfacing, scar treatment, and pigment lesion reduction, as well as experimental wound healing and certain soft-tissue procedures. Some designs emphasize improved patient comfort and reduced procedure times due to better energy coupling.

Safety and regulatory considerations cover sterilization of the gel and handpiece, skin compatibility, and adherence to medical device regulations. Usage typically requires trained clinicians and appropriate facility controls.