Overview
Persistent vegetative state (PVS) is a condition characterized by a lack of awareness of the environment and preserved brainstem reflexes following severe brain injury, often due to cerebral anoxia-ischemia 1. Patients exhibit wakefulness without meaningful interaction or cognitive function 12.Diagnosis
Clinical Criteria: Persistent state of wakefulness without sustained cognitive function or awareness 12.
Imaging: Early CT shows diffuse cerebral edema; later scans reveal border zone and posterior cerebral artery territory infarctions, basal ganglia low density, and ventricular enlargement with prolonged survival 1.
EEG: Virtual absence of neocortical activity, with preserved brainstem function evidenced by reflexes 2.Management
Supportive Care: Focus on maintaining vital functions, including nutrition (often via gastrostomy), hydration, and prevention of complications like infections 1.
Neurological Monitoring: Regular assessments for any signs of recovery or deterioration 1.
Palliative Care: Integration to address quality of life and family support 1.Special Populations
Pediatrics: Case reports indicate prolonged survival with selective brain region vulnerability; neuropathological findings show extensive cortical and basal ganglia necrosis 2.
Elderly: Not specifically addressed in provided abstracts.
Comorbidities: Not explicitly detailed in the abstracts provided.Key Recommendations
Utilize advanced imaging techniques (CT/MRI) to monitor progression and identify characteristic brain changes over time (Evidence: Moderate 1).
Implement comprehensive supportive care including nutritional support and infection prophylaxis (Evidence: Expert opinion 1).
Consider integrated palliative care to support both patient and family (Evidence: Expert opinion 1).References
1 Chu NS. Early and late CT manifestations in the persistent vegetative state due to cerebral anoxia-ischemia. Journal of the Formosan Medical Association = Taiwan yi zhi 1993. link
2 Cole G, Cowie VA. Long survival after cardiac arrest: case report and neuropathological findings. Clinical neuropathology 1987. link