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Biomedical subjects

H G Tabb

Publications and source records attributed to H G Tabb.

At least 19 recordsLinked to original sources
PubMed1985

Auditory evoked potential alterations induced by pulsed ultrasound.

Diagnostic levels of pulsed ultrasound were applied abdominally over the uteri of pregnant rats for five minutes daily during the first 20 days of gestation. The average energy output of the ultrasound machine at the optimum focal length of the transducer (5.4 cm) was 7.2 mW/sq cm. Postnatal auditory evoked potentials demonstrated a significant alteration in the offspring of the treated animals when compared with similarly treated, but nonexposed controls. This alteration only occurred in the high frequency range. Neither light nor electron microscopy revealed significant morphologic alterations in the cochlear elements of the exposed offspring. Although a cochlear deficit occurred in a range known to be important to the rat's hearing, several issues make this data reassuring to clinicians using diagnostic levels of pulsed ultrasound: the total amount of ultrasound exposure was higher than would be expected with human use, the defect was mild, and the absence of clear-cut morphologic abnormalities may indicate the presence of a minimal, or even reversible, defect.

Acoustic Stimulation↗
PubMed1985

Parotid surgery and the otolaryngologist.

Otolaryngologists are performing more parotid surgery and are using otologic landmarks and methods to identify and preserve the facial nerve. Over the past 15 years in the Department of Otolaryngology-Head and Neck Surgery at Tulane Medical School, use of the tympanomastoid fissure as a guide to the facial nerve has reduced the incidence of immediate facial paralysis from 60% to 14% in benign parotid disease.

Humans↗
PubMed1980

Frontal sinus fractures--their suppurative complications and surgical management.

A series of 54 patients treated for frontal sinus fractures at Charity Hospital, New Orleans, from 1967-77 is presented. There were a large number of suppurative complications related to the various medical and surgical managements. Initial treatments included: observation (15), exploration and open reduction (22), obliteration (16), and ablation (1). Four patients with open fractures were not explored and developed recurrent frontal sinusitis; one progressed to an osteomyelitis. Two with posterior table fractures were not explored and developed meningitis (one was then obliterated and developed an epidural abscess). Three patients developed frontal sinus abscesses after obliterations for anterior wall fractures. Fat gave fewer complications than the other commonly used materials. Exploration is advocated for most frontal sinus fractures. Obliteration should be avoided when possible. Fat is the material of choice when obliteration is required.

Adolescent↗
PubMed1980

Cervical approaches to the surgery of cervicothoracic neoplasia.

Seven cases are presented to illustrate four cervical surgical approaches to the upper mediastinum and thorax. These surgical approaches are described and illustrated, and we have termed these the retrosternal, retroclavicular, posterior, and lateral approaches. Two cases of thymic cyst, one of recurrent metastatic pretracheal adenopathy, a case of tracheal stenosis, a foreign body of the left subclavian artery, a large Zenker's diverticulum, and a neoglottic reconstruction are presented to illustrate the surgical anatomy, dissection technique, and postoperative complications.

Adolescent↗
PubMed1979

Gunshot injury to the temporal bone: an analysis of thirty-five cases.

By retrospective analysis of 35 surviving gunshot injuries to the temporal bone and by presentation of 6 representative cases, the management and reconstructive procedures of these injuries in the Tulane University affiliated hospitals are presented. The most frequent single injury was facial nerve paralysis (16 cases), followed by external canal injury and conductive hearing loss. Anacusis occurred in 12 cases. In conductive hearing loss the intact posterior wall tympanoplasty with mastoidectomy (16 cases), or the modified radical mastoidectomy (5 cases), allowed middle ear reconstruction. Transmastoid facial canal decompression, combined with the above procedures or with a middle fossa craniotomy, was performed in 6 cases. Delayed facial reconstruction (5 cases) utilized microneural anastomosis between facial-facial and hypoglossal-facial nerves and fascia lata slings. Intracranial complications of thrombosis of internal carotid artery, dural venous lacerations, temporal lobe aphasia, bitemporal hemianopsia, cerebral abscesses and meningitis are also discussed.

Adolescent↗
PubMed1979

Use of transverse Kirschner wires in comminuted facial fractures.

Although most facial fractures can be well managed with open reduction and direct wiring of the fracture sites, this treatment is inadequate for some comminuted fractures and further fixation is required. At Charity Hospital in New Orleans transverse Kirschner wires have been routinely used to stabilize the zygoma in these cases. Although this technic has been described previously, its indications, advantages, and limitations are not widely appreciated. Eight recent cases are presented to demonstrate the technic, and alternative methods of treatment are discussed.

Adult↗
PubMed1979

Clinical and experimental correlations in temporal bone fracture: the facial nerve.

In this review of 50 patients with fracture of the temporal bone, 11 patients had ipsilateral facial paralysis, three of immediate and eight of delayed onset. Eight patients with complete paralysis of the facial nerve had facial nerve decompression; six of these had incomplete return of function. Only one patient with a delayed complete facial paralysis had complete return of function. The poor functional results in patients with delayed complete facial paralysis due to temporal bone fracture encourage facial nerve decompression in all stable patients with the complete facial paralysis of temporal bone fracture.

Adult↗
PubMed1978

Round window ultrasonic irradiation for Meniere's disease with ENG monitoring.

Utrasonic irradiation of the labyrinth via the round window is effective in controlling otological vertigo. This method of surgical management for incapacitating vertigo is presented with demonstrative intraoperative electronystagmograms and irradiated cat neuro-epithelium. Such data suggest that more intense irradiation doses than previously reported should be applied to effectively destroy the diseased labyrinthine end organs. Precise end points of destructive irradiation are defined by characteristic intraoperative electronystagmograms. The authors suggest this is an ideal procedure when the situation of an unaffected cochlea, coexisting with a diseased labyrinth, requires a minimally invasive, destructive procedure which preserves hearing while eradicating vertigo.

Ear, Inner↗
PubMed1978

Supraglottic laryngectomy.

This paper describes the experience with subtotal supraglottic laryngectomy for laryngeal carcinoma at the Department of Otolaryngology of the Tulane University School of Medicine. Of 36 patients, 32 (89%) had local control of diseases at one year. Of 27 patients followed up for at least three years, 22 (81%) are free of disease. Postoperative aspiration was the most frequent complication, but was a serious problem in only one patient. Because of the significant functional advantage of partial laryngectomy, the high rate of disease control, and an acceptable complication rate, we believe supraglottic laryngectomy is the procedure of choice for laryngeal carcinoma in selected patients.

Follow-Up Studies↗
PubMed1978

Otitic hydrocephalus.

This case of otitic hydrocephalus emphasizes a complication of ear disease which is rarely seen in modern otologic practice. The diagnosis and treatment of this entity have been reviewed in detail. Although the mechanism of this hydrocephalus is unknown, several theories have been presented.

Child, Preschool↗
PubMed1977

Thoracic duct injuries.

Chylous fistulas are an infrequent result of injury to the thoracic duct during radical neck dissection. Leakage of lymph from a fistula which is allowed to persist will cause such serious postoperative problems as metabolic deficiencies, flap elevation, suture breakdown with hemorrhage, and infection. There appears to be no valid justification for extended conservative management if it fails to slow the leak within 48 hours. We recommend prompt exploration of the wound with an operating microscope and microsurgical ligation of the lacerated duct with nonabsorbable sutures.

Aged↗