Table 4 CTs performed after implementation of the NICEHI guideline for head injury, and whether they would have been done according to the pre‐existing guideline.
| No. | Age in years | Risk factors according to NICE | CT scan findings | Disposal | Would CT be indicated using our pre‐existing guideline | |
|---|---|---|---|---|---|---|
| Yes/no | Reason | |||||
| 1 | 25 | Focal neurology, GCS 11 | Brain injury | Admitted | Yes | GCS 11 |
| 2 | 80 | Post‐traumatic seizure, GCS 12 | Brain injury | Admitted | Yes | GCS 12 |
| 3 | 8 | DMI and LOC, GCS 13 | Brain injury | Admitted | Yes | Not improving GCS |
| 4 | 73 | DMI and LOC, GCS 14 | Brain injury | Admitted | Yes | Confusion |
| 5 | 21 | DMI and LOC, GCS 15 | Brain injury | Admitted | Yes | Severe headache |
| 6 | 28 | Focal neurology, GCS 15 | Brain injury | Admitted | Yes | Focal neurology |
| 7 | 77 | DMI and LOC, GCS 13 | Normal scan | Admitted | Yes | Not improving GCS |
| 8 | 3 | DMI and LOC, GCS 13 | Normal scan | Admitted | Yes | Not improving GCS |
| 9 | 12 | >1 episode of vomiting, GCS 14 | Normal scan | Admitted | Yes | Confusion, vomiting |
| 10 | 67 | GCS 13/14 at 2 hours after injury | Normal scan | Admitted | Yes | Not improving GCS |
| 11 | 43 | DMI, LOC and vomiting, GCS 15 | Normal scan | Admitted | Yes | Persistent vomiting |
| 12 | 3 | GCS 13/14 at 2 hours, GCS 14 | Normal scan | Admitted | Yes | Not improving GCS |
| 13 | 8 | Episodes of vomiting, GCS 14 | Normal scan | Admitted | Yes | Confusion, vomiting |
| 14 | 29 | Post‐traumatic seizure, GCS 14 | Normal scan | Admitted | Yes | Seizure |
| 15 | 11 | Vomiting, blurred vision, GCS 15 | Normal scan | Admitted | No | |
| 16 | 17 | Post‐traumatic seizure, GCS 15 | Normal scan | Admitted | Yes | Seizure |
| 17 | 45 | >1 episode of vomiting, , GCS 15 | Normal scan | Discharged | No | |
| 18 | 50 | GCS 13/14 at 2 hours after injury | Normal scan | Discharged | No | |
| 19 | 84 | DMI and on warfarin, GCS 15 | Normal scan | Admitted | No | |
| 20 | 42 | DMI and LOC, GCS 14 | Normal scan | Admitted | No | |
| 21 | 13 | DMI and LOC, GCS 15 | Normal scan | Admitted | No | |
| 22 | 59 | DMI and LOC, GCS 15 | Normal scan | Admitted | No | |
| 23 | 24 | DMI and LOC, GCS 15 | Normal scan | Admitted | No | |
| 24 | 38 | DMI and LOC, GCS 15 | Normal scan | Discharged | No | |
| 25 | 19 | DMI and LOC, GCS 15 | Normal scan | Discharged | No | |
| 26 | 18 | DMI and LOC, GCS 15 | Normal scan | Discharged | No | |
| 27 | 19 | DMI and LOC, GCS 15 | Normal scan | Discharged | No | |
| 28 | 28 | DMI and LOC, GCS 15 | Normal scan | Discharged | No | |
| 29 | 15 | DMI and LOC, GCS 15 | Normal scan | Discharged | No | |
| 30 | 33 | DMI and LOC, GCS 15 | Normal scan | Discharged | No | |
| 31 | 42 | DMI and LOC, GCS 15 | Normal scan | Discharged | No | |
| 32 | 60 | DMI and amnesia, GCS 15 | Normal scan | Admitted | No | |
| 33 | 13 | DMI and amnesia, GCS 15 | Normal scan | Discharged | No | |
| 34 | 13 | DMI and amnesia, GCS 14 | Normal scan | Admitted | No | |
| 35 | 19 | DMI and amnesia, GCS 14 | Normal scan | Admitted | No | |
| 36 | 20 | DMI and amnesia, GCS 14 | Normal scan | Admitted | No | |
DMI, dangerous mechanism of injury; GCS, Glasgow Coma Scale; LOC, loss of consciousness.