Number of operations and main reasons for 113 revisions of shunt in 32 patients (number of patients in parentheses)
| No of revisions in nine achievers | No of revisions in 23 non-achievers | Total revisions | ||
|---|---|---|---|---|
| Blocked shunt3-150 | 14 (8) | 54 (18) | 68 | 60% |
| Infection (ventriculitis, shunt infection, septicaemia) | 5 (3) | 13 (6) | 18 | 16% |
| Detachment | 1 (1) | 13 (8) | 14 | 13% |
| Other (extrusion 4, leaking back 2) | — | 6 (5) | 6 | 5% |
| Not known | — | 7 (6) | 7 | 6% |
| Total operations | 20 | 93 | 113 | 100% |
↵3-150 Blocked shunts were not revised if patients were asymptomatic.