The Cavitron Ultrasonic Surgical Aspirator is a unique modality for precise tissue removal which results in increased visibility, reduced bleeding, and shorter operating time when dealing with vascular lesions or organs.
Mutations in the gene for the enzymes superoxide dismutase 1 (SOD1) or copper zinc superoxide dismutase have been found in approximately 15-20 percent of the familial cases of ALS. Some quick math shows, then, that approximately 1 to 2 percent of all cases of ALS involve this particular gene mutation.
The other 90 to 95 percent of ALS is sporadic, meaning it occurs without a family history (in other words, sporadically). There appear to be genetic variations that influence one's susceptibility to sporadic ALS, even if they don't actually cause the disease by themselves.