Table 4.
Estimated concentration of CSF tracer within lateral ventricles of REF and iNPH patients.
| REF | iNPH | |||
|---|---|---|---|---|
| Volume CSF, lateral ventricles (ml) | 14.287 | 68.845 | ||
| Time after i.th. CSF tracer | 6–9 h | 24 h | 6–9 h | 24 h |
| Signal increase from baseline (ratio) | 7.56 | 2.73 | 31.41 | 23.72 |
| Concentration, CSF tracer (mM) | 0.0079 | 0.0022 | 0.031 | 0.024 |
| Change in concentration of CSF tracer from 6–9 h to 24 h (mM) | −0.0057 | −0.007 | ||
| Level of CSF tracer (µmol) | 0.11 | 0.033 | 2.13 | 1.65 |
| Change in level of CSF tracer from 6–9 h to 24 h (µmol) | −0.077 | −0.48 | ||
Note: The concentrations and levels of CSF tracer within the lateral ventricles were computed according to equation (1), see Materials and Methods section.
CSF: cerebrospinal fluid; iNPH: idiopathic normal pressure hydrocephalus; REF: reference patients.