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Table 2 Definitions for categorical rankings of noninvasive ICP monitoring methods

From: Review: pathophysiology of intracranial hypertension and noninvasive intracranial pressure monitoring

Rank

Definition

1

Method is not useful, either due to being inaccurate or simply lacking enough evidence to make an assessment

2

Method may be useful as a supplement to invasive monitoring, but results are likely very limited and mixed, and more research and/or development is needed

3

Though not necessarily universally positive, evidence is generally more consistent and substantial than for rank 2 and method is likely to be useful as a supplement to invasive measurement in at least some clinical situations in the absence of technical hurdles to adoption