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Biomedical subjects

J L Pulec

Publications and source records attributed to J L Pulec.

At least 163 records · Page 9Linked to original sources
PubMed1993

Aggressive fibromatosis (fibrosarcoma) of the facial nerve.

Aggressive fibromatosis of the facial nerve is a very rare tumor. Three cases have been previously reported. The tumor is locally recurrent and often has a fatal outcome. This report is of a ten-year-old boy whose tumor originally developed in the parotid area with subsequent spread to the base of the skull, the neck and the cerebellopontine angle. Treatment was by wide surgical excision, radiation therapy and chemotherapy. Despite treatment, the patient died. The clinical features of this case will be described. Only wide surgical excision early in the course of the disease may offer a chance for cure.

Brain↗
PubMed1989

The sinusoidal harmonic acceleration test in vestibular disorders. Comparative study with caloric test results.

Sinusoidal harmonic acceleration test (SHA) was performed on 89 patients with peripheral vestibular disorders. The results of SHA were compared with that of the alternate bilateral caloric test. The patients were classified into 3 groups according to the degree of asymmetry of the caloric response (CP). In the lowest frequency rotation (0.01 Hz), the phase lags for all 3 groups were smaller than the normals. The phase lags tended to approach the normal value as the frequency of rotation increased, resulting in a phase lag curve of typical peripheral type. Even subjects without CP revealed a decreased phase lag. This indicates that the SHA at low frequencies is more sensitive than the caloric test for diagnosing a vestibular lesion. In the 0.02 Hz range, the phase lag of the patient without CP were close to the normals, however, the phase lags of the patients with severe CP were smaller than the normals. This suggests that SHA to 0.02 Hz should be given more credence, since it appears to be critical for diagnosing more extensive lesions.

Acceleration↗
PubMed1989

Multichannel extracochlear implant.

The transcutaneous eight-channel extracochlear implant has undergone continuous revision to simplify the surgical technique, to minimize patient morbidity, and to improve performance. The extracochlear electrode array has been miniaturized so that it can be inserted through the facial recess without disturbing the external auditory canal, tympanic membrane, or malleus. The use of the remote antenna placed around the external auditory canal has greatly increased battery life and patient comfort. With its simplified incisions, the surgical procedure can be performed as out-patient surgery. Preoperative cochlear nerve testing and use of evoked response cochlear nerve testing allow preadjustment of the speech processor. Current features and performance of the implant are discussed.

Acoustic Stimulation↗