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Biomedical subjects

D Baguley

Publications and source records attributed to D Baguley.

7 recordsLinked to original sources
PubMed2001

Guidelines for the grading of tinnitus severity: the results of a working group commissioned by the British Association of Otolaryngologists, Head and Neck Surgeons, 1999.

Tinnitus is a common experience with up to one third of the adult population experiencing it at some time in their life. Less than 1% of the adult population have tinnitus of sufficient severity to affect their quality of life seriously (although up to 8% may seek medical advice about it). Much of the severity of tinnitus relates to the individuals' psychological response to the abnormal tinnitus signal. The prevalence of tinnitus increases in association with high frequency hearing loss. There is, unfortunately, no diagnostic test that either confirms the presence of tinnitus or its severity. Currently there is no satisfactory severity grading system. A five-point severity grading scheme is therefore proposed and the entry criteria detailed. The five severity points are: slight, mild, moderate, severe and catastrophic. Categorization as 'severe' or 'catastrophic' should be, by epidemiological definition, very rare. General guidance, theory and evidential support are contained within.

Adult↗
PubMed1993

Closing the loop on auditory evoked potential recording: verifying the integrity of AEP equipment.

The integrity of the recording equipment in evoked response testing is essential for accurate recordings. The presence of a fault that disrupts the waveforms will degrade the accuracy of the test in diagnostic and threshold testing. Examination of the equipment alone is usually difficult due to the presence of other factors that may be the cause of disrupted waveforms (the electrodes, the patient, and the environment). This paper describes a simple test that allows examination of the recording equipment alone without the effect of other variables.

Audiometry, Evoked Response↗
PubMed1989

Aberrant reinervation of the stapedius muscle following facial palsy.

This case report describes the clinical course of a patient with Ramsay Hunt Syndrome. Partial recovery of the lower motor neuron facial palsy was associated with decreased hearing and a reduction of the middle ear compliance on voluntary contraction of the facial musculature. It is suggested that this is due to misdirection of regenerating nerve fibres, normally destined for facial muscles, to stapedius muscle.

Adult↗
PubMed1989

Surgery for acoustic neurinoma. An analysis of 100 translabyrinthine operations.

A consecutive series of 100 translabyrinthine operations for removal of acoustic neurinoma is reported. Complete tumor removal was achieved in 97% of cases. There were three perioperative deaths, and the postoperative morbidity rate was low. The facial nerve was preserved anatomically in 82% of patients. Preoperative facial weakness and tumor size larger than 2.5 cm were predictive of poor facial recovery. In patients with an intact nerve but complete facial palsy 1 week after surgery, electroneuronography was a good predictor of the final facial outcome and may influence the timing of rehabilitative procedures. With the exception of patients who have small tumors and good speech discrimination (where a suboccipital approach may preserve hearing acuity), the translabyrinthine operation is the procedure of choice for removal of acoustic neurinomas in patients who have normal hearing in the contralateral ear.

Adult↗
PubMed1988

Bruns bidirectional nystagmus in cerebellopontine angle tumours.

Bruns nystagmus is an uncommon, bidirectional optokinetic disturbance associated with advanced cerebellopontine angle tumours. In a retrospective analysis of 115 such tumours, Bruns nystagmus was observed in 18 patients (16%). All tumours in this group were 3 cm or greater in diameter. Fourth ventricle displacement as assessed by computerized cranial tomography was present in all cases where the fourth ventricle was visualized (89%). Seven of 15 cases (47%) had significant contralateral N5 delay on brainstem auditory evoked potential testing, 5 (33%) were normal and 3 (20%) gave no consistent result. It was concluded that Bruns nystagmus occurs in large tumours associated with significant brainstem distortion. The neurophysiological abnormalities demonstrated by brainstem audiometry appear to be a less sensitive measure of brainstem compression than neuro-anatomical assessment using CT.

Brain Stem↗