Acute Hydrocephalus in the PICU

In this episode, we discuss the case of a 15-year-old girl who presents with progressive headache, nausea, vomiting, and difficulty ambulating. Her condition rapidly evolves into altered mental status and severe hydrocephalus, leading to a compelling discussion about the evaluation, diagnosis, and management of hydrocephalus in pediatric patients.We break down the case into key elements:A comprehensive look at acute hydrocephalus, including its pathophysiology and causesEpidemiological insights, clinical presentation, and diagnostic approachesManagement strategies, including temporary and permanent CSF diversion techniquesA review of complications related to shunts and endoscopic third ventriculostomyKey Case Highlights:Patient Presentation:A 15-year-old girl with a 3-day history of worsening headaches, nausea, vomiting, and difficulty walkingAltered mental status and bradycardia upon PICU admissionCT scan revealed severe hydrocephalus without a clear mass lesionManagement Steps in the PICU:Hypertonic saline bolus improved her mental status and pupillary reactionsNeurosurgery consultation recommended MRI and close neuro checksInitial management included dexamethasone, keeping the patient NPO, and hourly neuro assessmentsDifferential Diagnosis:Obstructive (non-communicating) vs. non-obstructive (communicating) hydrocephalusConsideration of alternative diagnoses like intracranial hemorrhage and idiopathic intracranial hypertensionEpisode Learning Points:Hydrocephalus Overview:Abnormal CSF buildup in the ventricles leading to increased intracranial pressure (ICP)Key distinctions between obstructive and non-obstructive typesEpidemiology and Risk Factors:Congenital causes include genetic syndromes, neural tube defects, and Chiari malformationsAcquired causes: post-hemorrhagic hydrocephalus (e.g., from IVH in preemies), infections like TB meningitis, and brain tumorsClinical Presentation:Infants: Bulging fontanelles, sunsetting eyes, irritabilityOlder children: Headaches, vomiting, papilledema, and gait disturbancesManagement Framework:Temporary CSF diversion via external ventricular drains (EVD) or lumbar cathetersPermanent interventions include VP shunts and endoscopic third ventriculostomy (ETV)Complications of Shunts and ETV:Shunt infections, malfunctions, over-drainage, and migrationETV-specific risks, including delayed failure years post-procedureClinical Pearl:Communicating hydrocephalus involves symmetric ventricular enlargement and is often linked to inflammatory or post-treatment changes affecting CSF reabsorption.Hosts’ Takeaway Points:Dr. Pradip Kamat emphasizes the importance of timely recognition and intervention in hydrocephalus to prevent complications like brain herniation.Dr. Rahul Damania highlights the need for meticulous neurological checks in PICU patients and an individualized approach to treatment.Resources Mentioned:Hydrocephalus Clinical Research Network guidelines.Recent studies on ETV outcomes in pediatric populations.Call to Action:If you enjoyed this discussion, please subscribe to PICU Doc On Call and leave a review. Have a topic you’d like us to cover? Reach out to us via email or on social media!Follow Us:Twitter: @PICUDocOnCallEmail: [email protected] tuned for more cases that challenge and inspire us as PICU clinicians!