Endometrial ablation is a procedure that uses a lighted viewing instrument (hysteroscope) and other instruments to destroy (ablate) the uterine lining, or endometrium. Endometrial ablation can be done by:
Laser beam (laser thermal ablation).
Heat (thermal ablation), using:
A balloon filled with saline solution that has been heated to 85C (thermal balloon ablation).
Normal saline (heated free fluid).
Electricity, using a resectoscope with a loop or rolling ball electrode.
The endometrium heals by scarring, which usually reduces or prevents uterine bleeding. http://women.webmd.com/endometrial-ablation-16200