
Alkalotic Alice
Metabolic Alkalosis
Written lecture — video coming
The memory hook
Vomiting and diuretics, tingling fingers, pH ↑ · HCO₃⁻ ↑
The story
Alice spends three days vomiting after a stomach bug and keeps her water pill going the whole time. Every heave sends hydrochloric acid down the drain until her blood turns sweet and her fingers start to buzz.
Alice Vance is a meticulous retired florist who prides herself on rigid adherence to routine, running her small neighborhood shop with fastidious order. Her mnemonic identity, Alkalotic Alice, reflects the dangerous internal shift that occurs when her system is stripped of vital acids, tilting her serum into a severely basic state. Every physiological process in Alice’s body depends on a delicate electrochemical equilibrium, but when hydrogen and chloride ions are rapidly discarded, her bloodstream swings sharply upward on the pH scale. Alice is not consuming massive amounts of base; rather, she is losing hydrochloric acid while her kidneys relentlessly dump potassium and chloride under the influence of her daily medications. As her bicarbonate levels climb unopposed, Alice transforms from a tidy, energetic shopkeeper into a textbook presentation of severe metabolic alkalosis.
The cascade began innocently when Alice contracted a virulent gastroenteritis, triggering seventy-two unrelenting hours of nausea and persistent emesis. Despite being unable to keep down clear broth or water, her rigid discipline compelled her to swallow her daily furosemide tablet every single morning without fail. With every violent heave, Alice expelled pints of gastric hydrochloric acid down the drain, while the loop diuretic forced her renal tubules to waste even more chloride, sodium, and potassium in her concentrated urine. Starved of intake and depleted of chloride, her kidneys began actively reabsorbing bicarbonate to preserve vascular volume. Early warning signs crept in quietly: mild lightheadedness, vague irritability, and a strange buzzing sensation around her lips and fingertips that she brushed off as mere fatigue from the stomach bug.
By the time an ambulance transported her to the emergency department, Alice was drifting into profound lethargy. Her respirations had slowed to a shallow eight breaths per minute as her lungs desperately retained carbon dioxide to counter the surging base. When the triage nurse inflated a manual blood pressure cuff, Alice’s wrist involuntarily flexed into an agonizing carpal spasm—a classic positive Trousseau’s sign driven by alkalosis-induced hypocalcemia. Tapping her facial nerve elicited a rapid twitch of her mouth, confirming Chvostek’s sign. Arterial blood gas analysis revealed an alarming pH of 7.54, a PaCO2 of 49 millimeters of mercury, and a serum bicarbonate of 36 milliequivalents per liter. Her serum potassium had plunged to 2.9 milliequivalents per liter, triggering frequent premature ventricular contractions across the bedside cardiac monitor.
The nurse immediately recognized a chloride-responsive crisis and initiated interventions in rapid, structured priority. The loop diuretic was instantly withheld, and an intravenous dose of ondansetron was administered to halt further upper gastrointestinal losses. The nurse initiated an infusion of intravenous zero-point-nine percent sodium chloride, supplying the essential chloride anions Alice’s kidneys required to excrete excess bicarbonate. Potassium chloride was piggybacked at ten milliequivalents per hour under continuous electrocardiogram monitoring, strictly avoiding rapid administration or direct intravenous push, which could provoke lethal ventricular dysrhythmias. Fall and seizure precautions were established due to neuromuscular irritability. The nurse continuously tracked respiratory rate, pulse oximetry, and hourly urine output, knowing that administering free water without electrolytes was strictly contraindicated because it would worsen hemodilution and fail to correct the underlying hypochloremia.
The setup
Three days of vomiting, no fluids kept down, and a furosemide dose she never skipped.
The turn
Her fingers and lips start tingling, her hands cramp when the blood pressure cuff inflates.
The crisis
Her breathing slows and shallows out; the monitor shows a run of PVCs while her K⁺ reads 2.9.
The save
Normal saline with potassium chloride replaces the chloride she vomited away, and the diuretic is held.
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