Evaluation of Patient Falls

Sensory System Dysfunction

• Proprioceptive impairment from dorsal column disease, peripheral neuropathy, or deafferentation causes loss of position sense; proprioceptors in muscles, tendons, and joints normally provide real-time spatial awareness via spinocerebellar tracts
• Vestibular system deterioration involving age-related loss of vestibular hair cells and altered central processing of vestibulo-ocular and vestibulospinal reflexes; the vestibular nuclei integrate head position, acceleration, and visual input to maintain balance
• Visual impairment from cataracts, macular degeneration, glaucoma, or refractive error disrupts visual flow integration critical for dynamic balance; the visual cortex processes optic flow to anticipate postural adjustments
• Dorsal stream visual processing (spatial awareness) becomes particularly vulnerable in aging

Motor System Dysfunction

• Muscle weakness from sarcopenia (age-related loss of muscle mass and strength mediated by decreased protein synthesis, increased proteolysis, and motor neuron denervation) reduces the ability to generate corrective forces during perturbation
• Parkinsonism causes bradykinesia, rigidity, and postural instability through degeneration of substantia nigra dopaminergic neurons, disrupting basal ganglia output necessary for motor planning and automatic movement
• Cerebellar ataxia impairs coordination of multisegmental movements through disrupted cerebellar-cortical-striatal circuits, affecting the timing and scaling of motor commands
• Pyramidal tract involvement from stroke or myelopathy causes spasticity, weakness, and hyperreflexia that compromise rapid postural responses

Central Integration Deficits

• Frontal lobe dysfunction from normal pressure hydrocephalus, vascular disease, or primary degeneration impairs executive function necessary for attention-dependent balance tasks and adaptive stepping
• Brainstem dysfunction affecting the reticular formation and vestibular nuclei disrupts automatic postural reflexes (righting, protective extension) mediated by reticulospinal and vestibulospinal pathways
• Basal ganglia disease disrupts internally generated motor programs and movement scaling, causing festination, freezing, and impaired postural reflexes
• The cerebellum's role in motor learning is compromised, preventing adaptation to environmental changes

Cardiovascular and Metabolic Factors

• Orthostatic hypotension results from impaired baroreceptor sensitivity, autonomic insufficiency, or volume depletion, causing a drop in systolic blood pressure ≥20 mmHg (or ≥10 mmHg diastolic) within 3 minutes of standing; this reduces cerebral perfusion below the autoregulatory threshold (~50 mmHg mean arterial pressure)
• Syncope from arrhythmias, vasovagal responses, or carotid hypersensitivity causes sudden loss of consciousness and inability to protect oneself during the fall
• Hypoglycemia impairs cortical function and cognitive processing necessary for balance maintenance
• Cardiac output reduction from heart failure or valvular disease limits the ability to increase cerebral perfusion during postural stress

Pharmaceutical Effects

• Benzodiazepines and sedating drugs enhance GABA-mediated inhibition throughout the CNS, impairing alertness, cognition, and motor coordination
• Antihypertensives reduce blood pressure, particularly affecting cerebral autoregulation in the setting of impaired autonomic function
• Anticholinergics impair cognitive processing and balance through central cholinergic depletion

Neurological Causes (40-50% of falls)

• Gait disorders including Parkinsonian gait (shuffling, reduced stride length, postural instability), cerebellar ataxia (wide-based gait, dysmetria), sensory ataxia (high-stepping, positive Romberg), and cautious gait (fear of falling)
• Vertigo and dizziness from benign paroxysmal positional vertigo (BPPV—most common cause of vertigo in elderly), vestibular neuritis, Ménière disease, or central causes (stroke, multiple sclerosis)
• Seizures presenting as unexplained falls, particularly focal seizures with secondary generalization
• Stroke and TIA causing acute weakness, ataxia, or neglect
• Normal pressure hydrocephalus producing the classic triad of gait disturbance ("magnetic" gait), incontinence, and dementia
• Dementia and delirium impairing judgment, awareness, and motor planning
• Peripheral neuropathy causing proprioceptive loss and sensory ataxia; diabetes mellitus is the most common cause
• Spinal cord pathology (myelopathy, myelitis) causing weakness, spasticity, and gait dysfunction
• Myopathy causing proximal weakness and difficulty rising from seated position
• Movement disorders including essential tremor, dystonia, and myoclonus

Cardiovascular Causes (20-30% of falls)

• Orthostatic hypotension from autonomic dysfunction, dehydration, blood loss, anemia, or medications (antihypertensives, vasodilators, diuretics, tricyclic antidepressants, dopamine agonists)
• Arrhythmias including sick sinus syndrome, complete heart block, atrial fibrillation with rapid ventricular response, or paroxysmal ventricular arrhythmias (detected in 5% of unexplained falls on ambulatory cardiac monitoring)
• Syncope from vasovagal response, carotid sinus hypersensitivity (exaggerated baroreceptor reflex causing >3 seconds of asystole or >50 mmHg blood pressure drop with carotid massage), or situational triggers (micturition, cough, defecation syncope)
• Valvular disease and cardiac outflow obstruction (aortic stenosis, hypertrophic cardiomyopathy, mitral stenosis)
• Acute coronary syndrome presenting as syncope or presyncope
• Heart failure with reduced cardiac output and orthostatic stress

Metabolic and Systemic Causes (10-15%)

• Hypoglycemia in diabetic patients on insulin or sulfonylureas
• Hypothyroidism causing weakness, cognitive slowing, and ataxia
• Anemia reducing oxygen-carrying capacity and causing cerebral hypoperfusion
• Electrolyte abnormalities (hyponatremia, hypokalemia, hypercalcemia) affecting neuromuscular function and cognition
• Infections including urinary tract infection, pneumonia, or sepsis (particularly common precipitants in elderly)
• Acute illness from any cause causing delirium, weakness, or deconditioning

Medication-Related Causes (25-40% of falls)

• Psychotropic medications: benzodiazepines, non-benzodiazepine hypnotics (zopiclone, zaleplon), sedating antidepressants (tricyclics, trazodone), antipsychotics (risperidone, quetiapine)
• Cardiovascular medications: diuretics (volume depletion), vasodilators (nitrates, calcium channel blockers), beta-blockers (bradycardia), ACE inhibitors, angiotensin receptor blockers, antiarrhythmics
• Anticonvulsants: phenytoin, phenobarbital, levetiracetam
• Opioids: impair cognition and coordination; also cause orthostatic hypotension
• NSAIDs: increase bleeding risk with falls; may worsen renal function and electrolytes
• Anticholinergics: impair cognition and accommodation

Environmental/Extrinsic Factors (30-50%)

• Home hazards: poor lighting, uneven flooring, loose rugs, clutter, inadequate handrails
• Footwear: slippers without grip, high heels, worn soles
• Bath and toilet safety: slippery surfaces without grab bars, toilet seat height
• Stair hazards: inadequate lighting, missing handrails, steep steps
• Environmental distractions: busy crowds, complex visual scenes

Intrinsic Risk Factors

• Age >75 years (exponential increase in fall risk)
• Female gender (higher fracture risk due to lower bone density, though fall rate similar or slightly lower)
• History of falls (strongest predictor of future falls; 2-3 fold increase in risk)
• Polypharmacy (≥4 medications significantly increases risk)
• Cognitive impairment (dementia, mild cognitive impairment, delirium)
• Functional limitation (activities of daily living dependence, low physical activity)
• Vision problems (uncorrected refractive error, cataracts, macular degeneration)
• Hearing loss (impairs postural stability independent of cognitive effects)
• Depression (associated with reduced activity, poor judgment, increased suicide risk via falls)
• Osteoporosis (increases fracture severity but not fall rate)

Cardinal Symptoms and History

• Reported fall: patient or witness account of falling to the ground or lower level; elderly with cognitive impairment may not recall or report falls accurately
• Mechanism of fall: determines evaluation approach—witnessed vs. unwitnessed, anticipated vs. unanticipated, forward vs. backward, with or without loss of consciousness
• Prodromal symptoms: dizziness, lightheadedness, blurred vision, weakness, or palpitations occurring before the fall
• Loss of consciousness: suggests syncope, seizure, or severe head trauma; critical for determining cause
• Injuries sustained: head trauma (epidural/subdural hematoma, concussion), fractures (hip, wrist, pelvis), soft tissue trauma
• Inability to rise: "long lie" after fall associated with rhabdomyolysis, pressure ulcers, and dehydration; indicates functional decline if unable to get up independently
• Fear of falling: anxiety-driven avoidance of activity leading to deconditioning and paradoxically increasing fall risk; can develop after a single fall

Circumstances of Fall

• Timing: falls in early morning (orthostatic), at night (poor lighting, toileting), or during specific activities (getting out of bed, bathing)
• Location: home vs. public space; bathroom falls common
• Clothing and footwear: wearing slippers, inappropriate shoes
• Activity at time of fall: ambulating, standing from seated position, reaching overhead, turning head
• Precipitating events: trip, slip, dizziness, chest pain, palpitations

Physical Examination Findings

• Orthostatic vital signs: measure blood pressure and heart rate supine, at 1 minute standing, and at 3 minutes standing; orthostatic hypotension defined as drop of ≥20 mmHg systolic or ≥10 mmHg diastolic; note heart rate response (tachycardia suggests volume depletion; bradycardia suggests arrhythmia or medication effect)
• Pulse abnormalities: irregular rhythm (atrial fibrillation, premature contractions), bradycardia (<50 bpm suggests conduction disease), tachycardia (>100 bpm at rest)
• Murmurs or bruits: aortic stenosis (systolic crescendo-decrescendo murmur best heard at right upper sternal border), carotid bruit (suggests atherosclerosis; perform carotid massage cautiously if no bruit)
• Edema or signs of heart failure: peripheral edema, elevated JVP, pulmonary crackles
• Cyanosis or pallor: suggests hypoxia or severe anemia

• Mental status: assess cognition (MMSE, Montreal Cognitive Assessment), alertness, orientation; delirium indicated by acute confusion, inattention, behavioral changes
• Cranial nerves: visual fields (neglect), extraocular movements (diplopia, nystagmus with BPPV), facial symmetry (stroke)
• Motor examination: strength grading in all extremities using 0-5 scale; focal weakness indicates stroke or myelopathy; proximal weakness suggests myopathy or Guillain-Barré syndrome; distal weakness suggests peripheral neuropathy
• Tone: spasticity (stroke, myelopathy), rigidity (Parkinsonism—"lead pipe" or "cogwheel"), hypotonia (cerebellar disease, myopathy)
• Reflexes: hyperreflexia and Babinski sign (pyramidal tract disease/stroke); hypo- or areflexia (peripheral neuropathy, Guillain-Barré); delayed relaxation phase (hypothyroidism)
• Sensory examination: proprioception (dorsal column disease causes sensory ataxia with positive Romberg), vibration sense (peripheral neuropathy, B12 deficiency, tabes dorsalis), pain/temperature (spinothalamic tract lesion), light touch
• Cerebellar signs: dysmetria (finger-to-nose test, heel-to-shin test), dysdiadochokinesia (rapid alternating movements), nystagmus, ataxic gait
• Special tests:
• Romberg test: positive if patient loses balance with eyes closed (indicates proprioceptive loss); must ensure patient safety with hands ready to catch
• Dix-Hallpike maneuver: positive if reproduces vertigo and nystagmus (diagnostic for BPPV)
• Fukuda stepping test: patient marches in place with eyes closed; displacement >30° suggests vestibular dysfunction
• Head impulse test (HIT): patient fixates on examiner's nose while head is moved side-to-side; corrective saccade indicates vestibular impairment

• Gait observation: note stride length (short in Parkinsonism), gait width (wide-based in ataxia, normal in Parkinsonian gait which is narrow-based), symmetry, ability to turn, speed
• Gait abnormalities:
• Parkinsonian gait: shuffling, reduced arm swing, stooped posture, difficulty initiating gait (freezing), en bloc turning
• Ataxic gait: wide-based, unsteady, trunk sway
• Magnetic gait (normal pressure hydrocephalus): appears to shuffle but feet stick to floor
• Hemiplegic gait: circumduction of affected leg, reduced arm swing on affected side
• Steppage gait (foot drop): high stepping on affected side to clear foot
• Waddling gait: proximal weakness causing hip abductor insufficiency
• Antalgic gait: limp due to pain
• Get Up and Go test (Timed Up and Go): patient rises from armchair, walks 10 feet, turns, and returns; time >12 seconds indicates high fall risk; observe for hesitation, unsteadiness, use of arms, trunk control
• Standing balance: observe for sway; inability to stand independently indicates severe dysfunction
• Tandem stance: feet in line; inability to maintain for 10 seconds indicates balance impairment
• Single-leg stance: inability to stand on one leg for ≥5 seconds indicates high fall risk
• Functional reach test: patient extends arm forward while standing; reach <6 inches indicates high fall risk

• Joint mobility and flexibility: limited range of motion (arthritis, contractures) impairs movement
• Foot examination: calluses, bunions, deformities, toenail problems affecting gait; decreased ankle dorsiflexion and plantarflexion strength
• Hip and knee examination: range of motion, strength (difficulty rising from squat)

Step 2 — bedside functional testing (the "confirmatory" tests in geriatrics)

• Timed Up and Go: >12 seconds identifies high fall risk (CDC STEADI cutoff). Watch how, not just how long — arm-push to rise suggests proximal myopathy/quadriceps weakness; en bloc turning suggests parkinsonism.
• 30-second chair stand: quantifies lower-extremity strength; below age/sex norms is abnormal.
• 4-stage balance test: inability to hold tandem stance 10 seconds is abnormal.
• Orthostatic vitals at 1 and 3 minutes — the single highest-yield vital sign in a faller.

Step 3 — targeted diagnostic testing

• ECG in every faller to exclude bradyarrhythmia, high-grade AV block, prolonged QT, or ischemia. If syncope is suspected, the ACC/AHA/HRS syncope guideline directs ambulatory monitoring matched to symptom frequency (Holter, event monitor, or implantable loop recorder for infrequent unexplained falls) and reserves tilt-table testing and carotid sinus massage for selected patients.
• Labs: CBC (anemia), BMP (sodium, calcium, renal function), glucose/A1c, TSH, B12, and 25-OH vitamin D — each targets a reversible contributor.
• Head CT (non-contrast) for head strike with loss of consciousness, focal deficit, altered mentation, or anticoagulant/antiplatelet use. The Canadian CT Head Rule excluded anticoagulated patients, so it cannot be used to withhold imaging in them — image them.
• Hip radiographs first for post-fall hip pain; if films are negative but the patient cannot bear weight, MRI is the gold standard for occult femoral neck fracture (CT is second-best).
• DXA per USPSTF osteoporosis screening once fracture risk is identified.

Immediate stabilization (first 24 hours)

• Trauma survey: exclude head, cervical spine, hip, and wrist injury before mobilizing. Elderly low-energy falls cause type II odontoid fractures — maintain spinal precautions in neck pain or altered mentation.
• Reverse anticoagulation emergently for traumatic intracranial hemorrhage: 4-factor PCC plus vitamin K for warfarin, idarucizumab for dabigatran, andexanet alfa for factor Xa inhibitors (Neurocritical Care Society/AHA reversal guidance).
• Check for rhabdomyolysis after a "long lie": aggressive IV isotonic fluids.

Cause-specific therapy

• Orthostatic hypotension: nonpharmacologic first (slow rising, abdominal binder/compression stockings, liberalized salt and fluid, remove offending drugs), then an alpha-1 agonist (midodrine) or mineralocorticoid (fludrocortisone); droxidopa for neurogenic causes.
• BPPV: Epley canalith repositioning maneuver is first-line (AAO-HNS guideline); vestibular suppressants are not.
• Symptomatic bradycardia/high-grade AV block: permanent pacemaker per the ACC/AHA/HRS bradycardia guideline — the definitive "procedural" fix for arrhythmic falls.
• Osteoporosis: bisphosphonate (alendronate) with calcium and vitamin D repletion reduces fracture, not falls.

Traumatic — emergencies

• Subdural hematoma: bridging veins are stretched by age-related cerebral atrophy and tear with minor shear; presents days to weeks later with fluctuating mentation, headache, or new gait decline. Crescentic, crosses sutures on CT. Anticoagulation is the key risk multiplier. Lucid interval belongs to epidural (arterial, lens-shaped) hematoma — a classic distractor. Emergency.
• Hip fracture: shortened, abducted, externally rotated leg. Mortality within the first year after hip fracture is high; guidelines favor surgical repair within 24–48 hours when medically stable. Urgent.
• Cervical spine (odontoid) fracture from low-energy falls in the osteoporotic elderly; neck pain or myelopathic signs. Emergency.
• Rhabdomyolyis after a "long lie": sustained muscle compression → myoglobinuria → pigment-induced AKI, hyperkalemia, compartment syndrome. Signaled by markedly elevated CK, dark urine, and urine dipstick positive for blood with no RBCs on microscopy. Emergency.
• Also from prolonged floor time: hypothermia, dehydration, pressure ulcers, aspiration pneumonia.

Functional and psychological

• Post-fall syndrome (fear of falling): activity avoidance → sarcopenia and deconditioning → higher subsequent fall risk. Signaled by self-restricted ambulation and a worsening Timed Up and Go despite no new injury.
• Loss of independence, caregiver burden, and nursing-home placement.

Treatment-related

• Midodrine: supine hypertension — dose during waking hours only, never at bedtime.
• Fludrocortisone: hypokalemia, edema, decompensation of heart failure.
• Abrupt benzodiazepine withdrawal: tremor, delirium, withdrawal seizures — taper.
• Bisphosphonates: pill esophagitis, atypical subtrochanteric femur fracture (prodromal thigh pain), osteonecrosis of the jaw.
• Physical restraints: strangulation, agitation, and paradoxically more injurious falls — an AGS/Beers-flagged harm, not a preventive measure.
• Anticoagulant continuation raises hemorrhage risk, but falls alone rarely outweigh stroke-prevention benefit in atrial fibrillation per ACC/AHA.

• The single best next step in an older adult who fell is almost always "review the medication list." Benzodiazepines, Z-drugs, anticholinergics, antipsychotics, opioids, and antihypertensives are the modifiable cause examiners want identified (AGS Beers Criteria). Deprescribing beats adding any drug.
• A prior fall is the strongest single predictor of the next fall. Screening question stems hinge on this, not on age alone.
• Timed Up and Go >12 seconds = high fall risk (CDC STEADI). Memorize the number and the maneuver: rise from a chair, walk 10 feet, turn, return, sit.
• Orthostatic vitals at 1 and 3 minutes are the highest-yield bedside test; ≥20 mmHg systolic or ≥10 mmHg diastolic drop. A paradoxically unchanged heart rate with the BP drop points to autonomic failure or beta-blockade, not volume depletion.
• **The most effective proven intervention is exercise — strength and balance training (tai chi, Otago), per the USPSTF. The USPSTF recommends against vitamin D given solely for fall prevention** in non-deficient community-dwelling adults ≥65 — a favorite distractor that used to be the "right" answer.
• Anticoagulated elder + minor head strike + normal neuro exam → still get a non-contrast head CT. Subdural hematoma is crescentic and crosses suture lines and may declare itself weeks later; the lucid interval and lens-shaped bleed belong to the epidural hematoma of a younger patient with a temporal bone fracture.
• Negative hip X-ray but cannot bear weight → MRI for occult femoral neck fracture. Do not discharge on the plain film alone.
• Restraints and bed alarms are never the answer. They do not reduce falls and cause injury; the correct choices are multifactorial assessment, PT/OT, home hazard modification, and deprescribing.
• Association examiners love: magnetic/apraxic gait + urinary incontinence + dementia = normal pressure hydrocephalus — a reversible, non-syncopal cause of recurrent falls.