Table 1 Grading system for catheter tip location[21] with additional grades 1a/1b
Grade | Accuracy of placement | Location of catheter tip |
|---|---|---|
1 | Optimal/adequate | Ipsilateral frontal horn, including tip of third ventricle: 1a, no contact with ventricle wall; 1b, contact with ventricle wall |
2 | Suboptimal in non-eloquent tissue | Contralateral frontal horn or lateral ventricle/corpus callosum/interhemispheric fissure |
3 | Suboptimal in eloquent tissue | Brainstem/cerebellum/internal capsule/basal ganglia/thalamus/occipital cortex/basal cisterns |