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Biomedical subjects

T Bergeron

Publications and source records attributed to T Bergeron.

7 recordsLinked to original sources
PubMed1989

Spontaneous extracranial pneumatocele associated with mastoid hyperpneumatization.

Spontaneous extracranial pneumatoceles unassociated with trauma are rare. We report a case of spontaneous extracranial mastoid pneumatocele associated with exuberant pneumatization of the calvarium and mastoid. The patient presented with a compressible bulge over the base of the zygoma and superior to the pinna. Surgical exploration demonstrated a large air sac in continuity with nontraumatic bony defects of the tympanosquamous and tympanomastoid sutures.

Air↗
PubMed1989

Computed tomography after skull base resection.

We have obtained serial CT scans in the evaluation and follow-up of 80 patients with lesions of the skull base. CT scanning has been useful for assessment of recurrence in this group of patients, many of whom underwent complex ablative and reconstructive procedures.

Follow-Up Studies↗
PubMed1987

Sonographic anatomy of the larynx, with particular reference to the vocal cords.

Sonographic images of the vocal cords were obtained in 41 healthy human subjects using a phased array realtime ultrasound scanner. The thyroid cartilage provides the acoustic window for sonographic visualization of the vocal cords. The false vocal cords appear as hyperechoic structures, while the true vocal cords are seen as hypoechoic structures. The symmetry of movement of the vocal cords during respiration becomes apparent on examination in real time. Sonography may prove to be a potentially useful technique for the examination of the vocal cords.

Adult↗
PubMed1977

Positive and negative contrast myelography in spinal trauma.

The myelograms of 60 acutely injured patients were reviewed. Positive contrast material (Pantopaque) was preferred in cervical and thoracic trauma manifesting bony deformity, in cervical trauma without bony deformity (in the prone position), in delineating the thoracic spinal cord in the frontal projection, and in lumbar spinal injuries. Negative contrast material (air) was preferred in cervical trauma without bony deformity, to delineate the thoracic spinal cord in the lateral projection and in chronic trauma to demonstrate cord atrophy. An experimental, water-soluble positive contrast material (Amipaque) may show the spinal cord advantageously in both the anteroposterior and lateral projections and may be more extensively used. A protocol has been devised, based on the analysis of the myelographic findings.

Adult↗
PubMedDate not supplied

Experimental cerebral infarction in the monkey. Radiographic evaluation of steroid therapy.

Cerebral ischemia and infarction have been produced in the Rhesus monkey using an autologous clot embolization technique. Preliminary findings suggest that cerebral arteriography may be used to study experimental cerebral infarction and ischemia, and the resulting cerebral edema and also that cerebral arteriography may be used as a tool for the evaluation of various types of therapy now used clinically in the treatment of these entities. The present experimental study in the monkey suggests that whereas steroid therapy initiated immediately following the onset of cerebral ischemia reduces morbidity and hastens clinical recovery, pretreatment with steroids in these same cases of cerebral ischemia may be hazardous and may increase the risk of cerebral infarction.

Animals↗