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Alterations in ventricular fluid pressure during ketamine anesthesia in hydrocephalic children
Insights
Ketamine administration in children with hydrocephalus does not alter ventricular fluid pressure (VFP) when given intramuscularly versus intravenously. Premedication with sedatives also did not affect VFP changes, suggesting consistent effects regardless of administration route or sedation.
Area of Science:
- Pediatric Neurology
- Anesthesiology
- Neurosurgery
Background:
- Hydrocephalus management in children often requires careful monitoring of intracranial pressure.
- Ketamine is used for anesthesia and sedation, but its effect on ventricular fluid pressure (VFP) requires further investigation, particularly concerning administration routes and premedication.
Observation:
- Ventricular fluid pressure (VFP) changes were studied in 26 pediatric hydrocephalus patients following ketamine administration.
- The study compared intravenous versus intramuscular ketamine administration and assessed the impact of sedative premedicants (secobarbital, droperidol, diazepam) on VFP.
Findings:
- Changing the route of ketamine administration from intravenous to intramuscular did not alter the peak VFP changes or the duration of pressure elevation.
- Premedication with commonly used sedatives did not demonstrably alter the ketamine-induced increase in VFP at clinical dosages.
Implications:
- Acute elevations in VFP, as potentially induced by ketamine, may compromise cerebral blood flow in vulnerable areas.
- These VFP changes could increase the risk of brain herniation in pediatric patients with hydrocephalus, necessitating cautious use of ketamine.
Abstract:
We studies ventricular fluid pressure changes in 26 hydrocephalic children following administration of ketamine. The increase in VFP previously found with intravenously administered ketamine was compared with changes after ketamine given intramuscularly, and the possible alteration of this increase with sedative premedicants was studies. Changing the route of administration did not change the time to peak VFP changes or the duration of pressure elevation. There was no demonstrable alteration of the increase in VFP by premedication with secobarbital, dorperidol, or diazepam in clinical dosage. We feel that acute rises of VFP may affect areas of marginal cerebral blood flow and may increase the risk of herniation of brain tissue.