Risk assessment
Pre-operative anaemia
Also known as: preoperative anaemia, anemia before surgery, iron deficiency anaemia
Pre-operative anaemia is a low haemoglobin concentration identified before surgery. It is common, frequently due to iron deficiency, and associated with more transfusion, longer stays and worse recovery. Because investigating the cause and treating it takes weeks, it is one of the clearest arguments for assessing patients at booking rather than shortly before their procedure.
- Common cause
- Iron deficiency
- Associated with
- Increased transfusion, longer length of stay, slower recovery
- Modifiable
- Yes, but requires investigation then treatment — weeks, not days
- Detected by
- Full blood count, with iron studies where indicated
Why it is worth finding early
Anaemia is not merely a marker of being unwell before surgery; it is a modifiable risk factor. Correcting iron deficiency changes the starting point a patient operates from, and reduces the likelihood of transfusion.
But correction is not fast. Finding the anaemia is the quick part — a full blood count. Establishing why it is there, treating the cause, and allowing the haemoglobin to respond is a process measured in weeks. A patient identified as anaemic three days before surgery gets the diagnosis without the benefit.
Where it fits in patient blood management
Pre-operative anaemia management is a standard component of patient blood management programmes, and one of the interventions that most clearly requires a functioning pre-admission pathway rather than a pre-admission appointment. The work has to start close to the point of booking.
The assessment implication
This is a case where the assessment’s job is partly to establish what has not been done. A patient may have no recent full blood count at all, and the absence is the finding. Pathways lists outstanding investigations explicitly on every risk profile rather than reporting only on the data it happens to have — a profile with nothing flagged is not the same as a profile that has been told everything.