Functional Lab Testing

Dipstick urinalysis screens urine for blood, protein, glucose, and pH to flag infection or kidney stress and guide next steps quickly.

Discogram injects contrast into spinal discs to identify disc pain sources when MRI is inconclusive and surgical planning is under consideration.

Dix-Hallpike maneuver provokes positional vertigo to evaluate BPPV and guide canalith repositioning or vestibular rehab decisions.

DHA measures an omega-3 fatty acid level to evaluate intake and status linked to brain, eye, and heart support, guiding diet or supplement changes.

Docosapentaenoic Acid (DPA) test measures blood omega-3 status to evaluate inflammation balance and cardiovascular risk trends and guide intake planning.

Doppler ultrasound visualizes real-time blood flow to evaluate clots, narrowed vessels, and poor circulation, supporting DVT or PAD workup.

Dual-energy CT (DECT) distinguishes uric acid deposits, stone type, and calcifications, supporting precise gout evaluation and kidney stone planning.

DEXA scan measures bone mineral density to evaluate fracture risk and track osteopenia or osteoporosis, guiding prevention and monitoring plans.

EPA/AA Ratio test compares EPA to arachidonic acid to gauge omega-3 vs omega-6 balance and inflammatory tone, guiding diet tweaks and metabolic risk context.

ERCP combines endoscopy and fluoroscopy to evaluate bile and pancreatic ducts for stones or obstruction and enable same-session stenting or removal when needed.

Ear drainage culture identifies bacteria or fungi and tests sensitivities, guiding targeted antimicrobial selection for persistent ear drainage, pain, or hearing changes.

Echocardiogram uses ultrasound to evaluate heart structure, valve function, and pumping strength, supporting workup of chest pain, swelling, or breathlessness.

Eicosapentaenoic Acid (EPA) test measures blood EPA to gauge omega-3 status, inflammatory balance, and heart risk, guiding intake targets and trend tracking.

Elaidic Acid test measures trans-fat exposure in blood to flag diet-related cardiometabolic risk and guide practical changes away from processed fats.

Electrocardiogram (ECG/EKG) records heart electrical activity to check rhythm problems or ischemia patterns and support monitoring during symptoms or care.

Electrocochleography (ECoG) measures inner-ear responses to evaluate pressure patterns often linked to Ménière’s disease, tinnitus, dizziness, or hearing loss.

Electroencephalography (EEG) records brain electrical activity to detect seizures, altered awareness, or sleep patterns and guide clinical follow-up next steps.

Electromyography (EMG) measures muscle and nerve signals to clarify neuropathy or nerve compression and guide evaluation of weakness, numbness, cramps, or pain.

Electronystagmography (ENG) tracks eye movements to evaluate vertigo and balance disorders and distinguish inner-ear from neurologic causes during workups.

Electrooculogram (EOG) measures eye-movement signals to evaluate retinal function and add context for retinal disorders when unexplained vision changes occur.

Elimination Diet & Challenge removes and reintroduces foods to pinpoint symptom triggers (GI, skin, fatigue) and support a sustainable eating plan long term.

ETAR-AAb test detects endothelin receptor autoantibodies to screen for vascular dysfunction risk in systemic sclerosis and guide targeted follow-up testing.

Eosinophil Absolute measures eosinophil count to gauge allergic, asthma, parasitic, or immune patterns and track inflammation trends with symptoms over time.

Eosinophil Relative reports eosinophils as % of white cells to gauge allergic or parasitic patterns and support CBC tracking with symptoms over time.

Epworth Sleepiness Scale (ESS) scores daytime sleepiness to screen for sleep disorder risk and support decisions on sleep studies and care adjustments next.

Erythrocyte Sedimentation Rate (ESR) measures red cell settling speed to gauge systemic inflammation and monitor immune activity trends during follow-up visits.

Esophageal Manometry test measures esophageal and LES pressures during swallowing to help assess motility disorders and guide reflux or dysphagia workups.

Esophageal pH Monitoring tracks 24-hour acid exposure to quantify reflux burden, link symptoms to events, and guide therapy when GERD is often still unclear.