Differential Diagnosis and Management of Post-Fall Nausea, Dizziness, and Vomiting in Elderly Patients

Primary Differential Diagnoses

The American Academy of Otolaryngology-Head and Neck Surgery recommends that benign paroxysmal positional vertigo (BPPV) is the most common cause of vertigo (42% of cases in primary care) and frequently occurs after head trauma in elderly patients 2, 3
BPPV can develop days to weeks after trauma, with a 3-week delay between fall and symptom onset being typical 1
Nausea worsening with walking and position changes is pathognomonic for BPPV, according to the American Academy of Otolaryngology-Head and Neck Surgery 1, 2
Elderly patients may present with isolated instability brought on by position changes rather than classic spinning vertigo, as noted by the American Academy of Otolaryngology-Head and Neck Surgery 1
The absence of headache, visual disturbances, aphasia, and gait ataxia argues against central causes, as stated by the Journal of the American College of Radiology 4, 2

Despite negative FAST, elderly patients remain at risk for delayed subdural hematoma up to several weeks post-fall, according to Ophthalmology 5
The gradual onset of nausea and vomiting over 3 weeks could represent slowly expanding intracranial pathology, as noted by the Journal of the American College of Radiology 4
Any elderly patient with persistent symptoms 3 weeks post-fall requires CT head imaging to exclude delayed intracranial hemorrhage, as recommended by the Journal of the American College of Radiology 4

The American Academy of Otolaryngology-Head and Neck Surgery recommends performing the Dix-Hallpike maneuver to diagnose BPPV, which is the single most important diagnostic test 1, 2, 3
Observe for characteristic nystagmus during the maneuver, which confirms BPPV, as stated by the American Academy of Otolaryngology-Head and Neck Surgery 1, 3
Complete HINTS examination (Head Impulse, Nystagmus, Test of Skew) to distinguish peripheral from central causes, as recommended by the Journal of the American College of Radiology 4, 2

If BPPV is confirmed, the American Academy of Otolaryngology-Head and Neck Surgery recommends performing the canalith repositioning procedure (Epley maneuver) immediately, which has an 80% success rate after 1-3 treatments 1, 7, 2
Administer prochlorperazine 5-10 mg orally or IV prophylactically before the maneuver if patient has severe nausea, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 7, 2
Avoid routine vestibular suppressants as they delay central compensation and increase fall risk in elderly patients, as noted by the American Academy of Otolaryngology-Head and Neck Surgery 7, 2

Never rely on negative FAST alone in elderly patients with persistent symptoms after fall, as stated by the Journal of the American College of Radiology 4
Do not assume absence of headache excludes intracranial pathology - elderly patients may not report headache with subdural hematoma, as noted by the Journal of the American College of Radiology 4
Avoid prolonged vestibular suppressants (benzodiazepines, antihistamines) as they significantly increase fall risk in elderly patients, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 7, 2

Mandatory reassessment within 1 month to document resolution or identify persistent symptoms requiring further evaluation, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 7, 2
If symptoms persist after initial BPPV treatment, repeat Dix-Hallpike and consider alternative diagnoses, as stated by the American Academy of Otolaryngology-Head and Neck Surgery 7, 2
Persistent symptoms warrant MRI brain if not already performed to exclude central pathology, as recommended by the Journal of the American College of Radiology 4, 2