Per PECARN head CT decision rules, which finding is an indication for CT imaging after minor head trauma in a young child?

A child intubated for status epilepticus and started on a continuous sedative infusion titrated to burst suppression does not awaken as expected after the infusion is weaned, and new sluggish pupillary responses are noted. Renal function is found to be impaired. What pharmacologic explanation connects the renal impairment to the delayed awakening?

A child undergoing procedural sedation with propofol develops progressive hypotension during the infusion, without any change in respiratory status. Given propofol’s known pharmacology, what is the most likely mechanism, and what bedside intervention addresses that mechanism specifically?

A 12-year-old presents with ptosis that worsens throughout the day and with sustained upward gaze, along with intermittent diplopia. Which additional bedside finding would support a diagnosis of myasthenia gravis?

In Guillain-Barré syndrome, SpO2 often remains reassuringly normal even as forced vital capacity is clearly trending downward. What does this dissociation teach about how intubation timing should be determined, and why is waiting for desaturation dangerous?

According to current operational definitions, status epilepticus is defined as:

A PICU patient on a benzodiazepine infusion is transitioned to dexmedetomidine to enable a spontaneous awakening trial. Two hours later the nurse notes new bradycardia. What is the most likely explanation, and what should the team assess before intervening?

A 3-month-old presents with constipation, poor feeding, weak cry, and descending paralysis beginning with cranial nerve findings (ptosis, poor suck), along with dilated pupils. What is the most likely diagnosis, and how does it differ from Guillain-Barré syndrome?

A teenager with severe TBI is initially normotensive but develops progressive hypotension over several hours despite adequate fluid resuscitation, in the setting of a high spinal injury pattern seen on imaging. What does this evolving picture suggest, and how should it change the resuscitation strategy compared to isolated TBI?

A PICU patient develops iatrogenic withdrawal after a prolonged opioid infusion; the team slows the wean and symptoms resolve. Two weeks later, the same patient requires a new opioid course for an unrelated procedure. What should the team anticipate about this patient’s opioid requirements, and why?