Audit standards derived from ESO and ESE guidelines
| Standard | SAH population | Criteria |
| Standard 1 | All patients | Serum sodium should be measured at least once every 48 hours |
| Standard 2 | Hyponatraemia | Serum sodium should be measured at least once every 48 hours |
| Standard 3 | Hyponatraemia | Volume status should be assessed daily while hyponatraemic |
| Standard 4 | Hyponatraemia | Blood glucose, urinary sodium, urinary osmolality, serum osmolality and morning serum cortisol should be measured at least once while hyponatraemic |
ESO, European Stroke Organisation; ESO, European Stroke Organisation; SAH, subarachnoid haemorrhage.