Biomedical subjects
Publications and source records attributed to W D Truax.
The diagnostic accuracy of bubble contrast transthoracic and transesophageal echocardiography and transcranial Doppler sonography in the detection of patent foramen ovale in divers with decompression sickness was assessed. Transcranial Doppler has a better positive and negative predictive value than the other modalities.
EEG monitoring was carried out by an EEG technician during 100 consecutive carotid endarterectomies in a community hospital. The technician's rating of the EEGs correlated with an inhouse electroencephalographer's interpretation and with historical published data. We conclude that intraoperative EEG monitoring during carotid endarterectomies can adequately be carried out by a competent EEG technician provided adequate physician backup and supervision are available.
Tremor is the most common movement disorder seen in clinical practice, encountered frequently by primary care physicians as well as neurologists. Most tremors can be classified as physiologic, enhanced physiologic, essential, cerebellar, or parkinsonian on the basis of careful clinical observation. Sometimes, electrophysiologic studies are helpful. With correct classification, effective treatment can usually be provided. Beta-blocking drugs are effective in both enhanced physiologic tremor and essential tremor, although at widely varying dosages, and a levodopa combination often relieves parkinsonian rest tremor.
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