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 |