Complications leading to revision procedure during 18 months of follow-up
| Initial therapy | VP shunt (n=26) | ETV (n=23) | |
| 25 revisions in 12 children | 30 revisions in 15 children | ||
| Therapy at the time point before revision | Still treated with VP shunt | Switched to VP shunt | Still treated with ETV |
| 25 revisions in 12 children | 11 revisions in 5 children | 19 revisions in 15 children | |
| Cause of revision* (more than one may apply) | |||
| Obstruction of catheter or ETV | 6 (24) | 4 (36.4) | 10 (52.6) |
| CSF leakage | 6 (24) | 4 (36.4) | 3 (15.8) |
| Catheter displacement | 3 (12) | 0 (0) | 0 (0) |
| Infection | 5 (20) | 3 (27.3) | 3 (15.8) |
| Dysfunctional valve | 2 (8) | 0 (0) | 0 (0) |
| Unknown | 7 (28) | 2 (18.2) | 3 (15.8) |
* Data are presented as number (percentage).
CSF, cerebrospinal fluid; ETV, endoscopic third ventriculostomy; VP shunt, ventriculoperitoneal shunt.