Tissue injury from cryoablation is due to which mechanisms?

• A. True
• B. False
• C. Ice crystal formation only
• D. Microcirculatory failure only in thawing period

Answer: (A)

Tissue injury from cryoablation results from more than one effect happening together. When tissue is frozen, ice crystals form both inside and outside cells, physically disrupting membranes and organelles and causing direct mechanical damage. At the same time, osmotic shifts during freezing pull water out of cells, concentrating solutes and stressing the cell membranes. As thawing occurs, injury to the microvasculature—endothelial damage, vasoconstriction, and thrombus formation—reduces blood flow and creates ischemia in the targeted area. This combination of immediate cellular disruption from ice crystals, osmotic injury during freezing, and vascular injury during thawing means tissue damage cannot be attributed to a single mechanism. That’s why the statement is true: multiple mechanisms contribute to tissue injury in cryoablation.