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The NHSN has several definitions for lower respiratory tract events — **VAE,
PedVAE, PedVAP, PNEU and LRI** — and the CDC's own FAQ opens by acknowledging
that this is confusing.
Sorting them out means holding two distinctions at once:
- Patients on mechanical ventilation versus patients not on it
- Events in adults versus in neonates and children
Each combination has its own definition, which is why there are five names
rather than one.
The distinction that decides what your data means
Before any of that, there is a more consequential split, and it is about
commitment rather than clinical definition.
| In-plan surveillance | Your facility has committed, in its NHSN monthly reporting plan, to following the NHSN surveillance protocol for that event |
| Off-plan surveillance | Your facility has decided to track something for internal use. No commitment to follow the protocol is made |
And the consequence:
**Data entered into NHSN off-plan are not used or reported in NHSN annual
reports or other NHSN publications.**
That is the whole architecture of the system in one sentence. National
healthcare-associated infection figures are built only from data a facility
formally undertook to collect by a defined method. Everything else a hospital
tracks can live in the same system without contaminating the national numbers.
It also explains why the definitions are so exacting. An in-plan event is a
promise about method, and a number that will be aggregated with thousands of
others — so what counts as a pneumonia has to mean the same thing in every
hospital that reports one.
*Source: National Healthcare Safety Network, Centers for Disease Control and
Prevention.*
Licencia: CC0 1.0 (dominio público) · Adaptado de www.cdc.gov
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