| 摘要 |
A gel-like material is provided, the gel-like material having an on-demand state-change capability, whether the on-demand change is to an initial state, a final state or both, at least some of the gel present or delivered undergoing the change. Alternatively, the gel-like material may have a spatially and/or temporally selective state-change, whether on-demand change is to an initial state, a final state or both, at least some of the gel present or delivered undergoing the change. Or, the gel-like material may selectively change state due to gel contacting diseased tissue having a natural thermal or compositional contrast or artificially induced thermal or compositional contrast capable of causing state-change via a state-change parameter, independent of an on-demand nature or a spatial/temporal selective nature.
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