Figure 8

Cutting damage of soft biological tissue: (a) Adipocytes apoptosis [116]; (b) Needle tissue damage at the hole surface [117]; (c) Structure damage of living adipose tissue after aspirated and excised [118]; (d) Backflow along the needle track in the rat brain [117]; (e) Surface damage of fresh porcine liver inserted with needles [44]; (f) Blood vessel damage accompanied needle insertion, including fluid displacement, vessel rupture, and severing, tugging, and dragging of microvasculature [119]