Publications by authors named "D A Houlden"
Objective: To determine the relationship between intraoperative flash visual evoked potential (FVEP) monitoring and visual function.
Methods: Intraoperative FVEPs were recorded from electrodes placed in the scalp overlying the visual cortex (Oz) after flashing red light stimulation delivered by Cadwell LED stimulating goggles in 89 patients. Restrictive filtering (typically 10-100 Hz), optimal reject window settings, mastoid reference site, total intravenous anesthetic (TIVA), and stable retinal stimulation (ensured by concomitant electroretinogram [ERG] recording) were used to enhance FVEP reproducibility.
Article Synopsis
- Very low pressure hydrocephalus (VLPH) is a rare condition often leading to poor outcomes and can be resistant to treatment, particularly with cerebrospinal fluid (CSF) drainage at low pressures.
- The study reviewed four cases of VLPH to identify factors that could help determine the best treatment approach and aimed to avoid unnecessary prolonged external ventricular drainage in patients who likely wouldn't improve.
- Findings suggest that improving Glasgow Coma Score (GCS) is linked to decreasing the frontal horn ratio and optimal CSF drainage, with good outcomes being dependent on brain viscoelasticity rather than mere fluid levels.
Background: The amplitude of the cortically generated somatosensory evoked potential (SSEP) is used to predict outcome in comatose patients. The relationship between epileptiform discharges and SSEP amplitude has not been elucidated in those patients.
Methods: Bilateral median nerve SSEP and electroencephalograph (EEG) studies were performed in a comatose patient (patient 1) 1 day after cardiac surgery and repeated 4 days later.