Symptoms Needle Predisposing  factors Time for diagnosis Age/Sex Ref HC and visual disturbances 25 G Quincke MP 12 weeks 49/M 12 HC and tinnitus 25 G Quincke ? ? 24/M 13 Diplopia ? Pregnancy 4 weeks 25/F 14 HC, right upper limb paresis 27 G Quincke None 48 hours 48/F 15 HC, vomiting and hemiparesis 25 whitacre Pregnancy 13 days 27/F 16 HC, ptosis and hemiparesis 25 whitacre None 24 hours 49/F HC and vomiting 26 G None 5 days 73/F 17 HC, vomiting and confusion 24 Quincke None 4 days 70/F 18 Coma ? ? 24 hours 53/F 19 HC 25 G Quincke None 21 days 39/F 20 HC and vomiting 27 G Quincke Double puncture 42 days 39/F 8 HC 27 G Quincke Pregnancy/MP 40 days 32/F Hemiparesis and coma ? MP < 1 day 69/M 21 HC, nausea and vomiting 24 G Quincke Pregnancy < 1 day 26/F 22 HC and diplopia 26 G Pregnancy/MP 8 days 31/F 23 HC and dysphasia 26 G Pregnancy 20 days 29/F 24 HC and hemiparesis 26 whitacre None 3 weeks 38/M 25 HC 24 G Sprotte None 40 days 68/M 26 HC and diplopia 19 G None 25 days 41/F 27 Confusion and sleepiness 25 G Quincke Brain atrophy 3 days 88/F 28 HC 22 G Quincke None 40 days 38/M 29 Diplopia 27 G None 2 weeks 38/F 30 HC and confusion 27 G whitacre Brain aneurysm 2 days 59/M 31 HC and hemiparesis 24 G Pregnancy 6 hours 28/F 32 HC and vomiting 24 G Sprotte Pregnancy 1 day 29/F 33 HC and vomiting 23 G Quincke None 1 week 20/M 34 HC, vomiting and coma 27 G whitacre Anticoagulants 10 days 42/M 35 Hemiparesis 22 G Pregnancy 14 days 31/F 36 Left hemiparesis and aphasia 26 G Pregnancy 5 days 27/F 37 HC and vomiting 22 G Quincke None 5 days 71/M 38 HC and vomiting 25 G Quincke MP 6 days 39/F 39 HC and hemiparesis 22 G Anticoagulants 11 days 63/F 40 HC and confusion 22 G None 30 days 68/M 41 HC and left orbital pain 25 G Quincke MP 2 weeks 68/M 42 Coma 22 G Quincke None 6 days 67/M 43 Frontal HC and confusion 25 G MP 3 weeks 67/M 44 HC and confusion ? None 30 days 50/M 45 HC and confusion 21 G Pregnancy 26 days 33/F 46 Dysphasia and hemiplegia 24 G None 29 days 63/M 47 HC, vomiting and confusion 22 G None 21 days 70/M 48 HC and left hemiparesis 26 G Pregnancy 30 days 39/F 3 Disorientation and hyperreflexia 22 G None 10 days 67/M 49 Coma 25 G Quincke MP 6 days 37/M 50 HC, diplopia and confusion 22 G None 48 days 69/M 51 HC,tinnitus 26 G Pencil-point Pregnancy 5 days 33/F 52 HC,seizures ? Pregnancy ? days 27/F 53 HC,photophobia ? Pregnancy 42 days 18/F 54 HC ? None 6 weeks 28/M 55 HC, tinnitus 25G Qunicke ? 2 days 24/F 56

Table 1: Reported cases of intracranial subdural hematoma after spinal anesthesia.