When this point is reached, the laser energy is stopped and {TAIL ~ a cool fluid} is immediately applied to the ablation site to create {HEAD ~ additional thermal stresses}, resulting in further ablation of tissue by the thermal expansion stress of rapid cooling 
When this point is reached , the laser energy is stopped and { TAIL ~ a cool fluid } is immediately applied to the ablation site to create { HEAD ~ additional thermal stresses } , resulting in further ablation of tissue by the thermal expansion stress of rapid cooling
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH