As Ling Ran had been operating on quite a lot of elderly patients suffering from liver cancer lately, he had learned much from it.
When he practiced on the simulation today, he did not cut open the liver to see the degree to which the cancerous cells had spread. Instead, he sliced off a chunk of tissue straight away to see how good his judgment was.
As it turned out, the cut he made was very accurate.
There was less than 0.4 inch of extra tissues.
In comparison, the normal practice during ordinary hepatectomy was to cut off an extra 1.2 inches or so of normal tissues. Patients who were in better health condition were able to take it, but elderly patients with weak liver function had a low likelihood of surviving the surgery. If they were to undergo normal hepatectomy, there was a very high chance that they would not wake up after the surgery.
The key to making a precise cut was a good judgment and practice.