Cryosurgery involves freezing tissue to extremely cool temperatures (-190 Celsius) in order to kill the cells. The mechanism of this destruction includes disruption of the cell wall, organelles within the cell and prohibiting blood from circulating. With the advent of newer delivery systems and ultrasound guidance one can destroy a focal area of tissue/cancer with accuracy up to 2.5 mm.
Cryosurgery of the kidney is performed laparoscopically. Three ports are placed to allow access to the kidney and site of tumor. Using ultrasound guidance the cryoprobe is placed in the center of the lesion. The probe then is cooled to Ǳ90 Celsius creating an ice ball. Using the ultrasound and specially designed temperature probes, the tumor and tissue surrounding it for 1cm. is cooled to Ǵ0 Celsius. The advantages of includes minimally invasive (no blood loss, no surgical incision, outpatient surgery), short recuperation period, procedure can be repeated if the first cryosurgery has failed, radical surgery is still an option if the first cryosurgery fails.
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