Case presentation
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A 19-year-old, 82.2-kg female with end-stage chronic kidney disease (glomerular filtration rate <15 mL/min) presented via ambulance for emergent ventriculoperitoneal shunt revision. Past medical history included myelomeningocele, hydrocephalus, neurogenic bowel and bladder, lower extremity paralysis, anemia, and secondary hyperparathyroidism. She was listed for cadaveric kidney transplant but had not yet received dialysis. Past surgical history included myelomeningocele repair, left ventriculoperitoneal shunt insertion, left clubfoot repair, debridement of a foot wound with skin grafting, and adenotonsillectomy.
Home medications included ergocalciferol 4000 units PO daily, ferrous fumarate 325 mg PO BID, sodium bicarbonate PO BID, sevelamer 800 mg PO TID, docusate sodium 100 mg PO QD, calcitriol 0.25 mcg PO BID, oxybutynin 10 mg × 2 PO daily, and amlodipine 10 mg PO daily. In the emergency department, she additionally received morphine 2 mg and ondansetron 4 mg.
On arrival, she reported severe frontal headache, nausea, emesis, photophobia, blurred vision, and declining mental status. Physical exam revealed altered mental status and nystagmus on upward lateral gaze. Her pulse was 113 beats/min; other vital signs, airway, cardiovascular, and respiratory exams were unremarkable. CT imaging revealed shunt dysfunction with enlargement of the lateral and third ventricles and a Chiari 2 malformation. Laboratory studies showed normal PT, PTT, INR, and cerebrospinal fluid analysis. Basic metabolic panel demonstrated blood urea nitrogen 37 mg/dL (reference 5–18 mg/dL) and creatinine 4.83 mg/dL (reference 0.5–1.20 mg/dL).
In the operating room, routine American Society of Anesthesiologists’ monitors were applied. Induction and rapid sequence intubation were performed with propofol 200 mg, fentanyl 200 mcg, lidocaine 80 mg, and rocuronium 80 mg. Anesthesia was maintained with isoflurane in air and oxygen. Intraoperative medications included cefazolin 2000 mg, dexamethasone 4 mg, and ondansetron 4 mg. Mild hypotension after induction was treated with phenylephrine (total intraoperative dose 400 mcg). Blood loss was minimal, and fluids included 500 mL of lactated Ringer’s.
Two hours and 10 minutes after rocuronium administration, no twitches were observed on train of four (TOF), but 4 posttetanic twitches were present. After 2 hours and 30 minutes, one twitch returned on TOF. At that time, sugammadex 4 mg/kg (total 328.8 mg) was administered. Within 10 minutes, there was full reversal of neuromuscular blockade, with return of protective airway reflexes, TOF response, adequate spontaneous ventilation, and purposeful movements.
The patient was extubated uneventfully and transferred to the postanesthesia care unit with supplemental oxygen until awake, alert, and oriented. She was subsequently transferred to the inpatient ward at baseline mental status. The postoperative course was unremarkable, and she was discharged home later that evening.
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