PUMP study: reservoir pumping in suspected underdrained shunted patients with normal pressure hydrocephalus – a prospective single-center study

The pumping test proved to be safe, effective, and capable of providing rapid clinical feedback. The additional use of observation sheets supports the monitoring of delayed effects. More invasive and costly tests can often be avoided-76% in this study. This non-invasive tap test should be considered a first-line diagnostic procedure in cases of suspected underdrainage, at least in NPH patients, before pursuing invasive diagnostics. However, not all flushing reservoirs are suitable for this "pumping test."