You give the oral vitamin K and wait 12-24 hours for it to have an effect.
At 2:31 am, a 3rd year medical student pops up who wants to practice taking blood. You let him do an FBC. The results come back thrity minutes later.
| Haemoglobin | 67 (130 – 180) g/l |
| MCV | 85 (80 – 97) fl |
| Platelets | 143 (150-400) x 10^9/l |
The patient’s pulse is 112 and his blood pressure is 97/67 mmHg. The student gleefully states this is nocturnal dipping.
“Hmm,” you grunt, less convinced. You start fluids and crossmatch four units. What else should you give?