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Biomedical subjects

G W Hicks

Publications and source records attributed to G W Hicks.

16 recordsLinked to original sources
PubMed1991

Treatment of sensorineural hearing loss.

Of the 25 million people who are hearing impaired, 85% suffer from sensorineural hearing loss (SNL). In the past decade, the identification and treatment of SNL have evolved from futile efforts to active intervention. This paper identifies nine forms of inner ear disorders causing SNL for which medical/surgical treatment is available. Physicians must realize that, with appropriate diagnosis and treatment, hearing nerve loss can have a satisfactory outcome.

Autoimmune Diseases↗
PubMed1988

A review of 925 cases of tympanoplasty using formaldehyde-formed-fascia grafts.

In this review of 925 cases of total and anterior perforations of the tympanic membrane reconstructed through the use of formaldehyde-formed-fascia (3-F) grafts, the postoperative nonperforation rate is 97.6%; blunting and/or lateralization of the graft was avoided in 93.5% of cases. Closure of the postoperative air-bone gap within 20 dB was achieved in 70% of cases. This update of a previously reported paper reinforces our opinion that the 3-F graft is an effective tool for the closure of tympanic membrane perforation with or without ossicular chain reconstruction.

Adolescent↗
PubMed1988

Delayed endolymphatic hydrops: a review of 15 cases.

Delayed endolymphatic hydrops is a disease entity that can be differentiated from Meniere's disease. This condition was first reported simultaneously by Nadol, et al. and Wolfson and Leiberman, with further clarification by Schuknecht. The disease is characterized by a profound sensorineural hearing loss in one ear, with the onset of episodic vertigo from that ear after a prolonged period of time (ipsilateral delayed endolymphatic hydrops) or the development of fluctuating hearing loss and/or episodic vertigo in the opposite ear after a prolonged period of time (contralateral delayed endolymphatic hydrops). This paper is a review of 15 cases of delayed endolymphatic hydrops, eight ipsilateral and seven contralateral. The results of this study indicate that surgical treatment for the ipsilateral form of the disease gave the best results. For the contralateral variant, it appears that medical measures should be the therapy of choice resorting, in the event of their failure, to conservative surgical intervention on what may be the only hearing ear to preserve hearing and control vertigo.

Adolescent↗
PubMed1987

Valved implants in endolymphatic sac surgery.

This study demonstrates the superiority of a valved implant (Denver-Arenberg valve) over simple sac decompression surgery for Meniere's disease. The valved implant has the advantage of better hearing results. Effectiveness in the relief of vertigo is equal for the two types of procedures. The phenomenon of enhanced high-frequency hearing gain has been observed only with valved implants. Rather spectacular hearing gains in a minority of patients have occurred primarily with the valved implant. Although the numbers are too small to draw any firm conclusions, it would seem that the valved implant is also useful in treating cochlear hydrops. Whether other therapeutic modalities will prove to be more beneficial than either of these procedures is not addressed in this article.

Adult↗
PubMed1983

Tumors arising from the glandular structures of the external auditory canal.

Neoplasms in the external auditory canal (EAC) of ceruminous gland origin have been generally classified under the title of ceruminoma, which is inaccurate and misleading. There have emerged four distinct types of ceruminous gland tumors of the EAC. They are 1. ceruminous adenoma, 2. adenoid-cystic carcinoma, 3. ceruminous adenocarcinoma, and 4. pleomorphic adenoma (mixed tumor). The natural course and clinical approach to these tumors can be determined by accurate histopathologic evaluation. This paper presents 10 cases of tumors of glandular origin in the EAC, 4 cases being ceruminous adenomas, 3 cases being adenoid-cystic carcinomas, 2 cases being ceruminous adenocarcinoma, and 1 case of pleomorphic adenoma (mixed tumor). In reviewing these cases as well as those in the literature, a number of recommendations are suggested: 1. Identifying a tumor of the glandular structures of the EAC solely as a ceruminoma is no longer acceptable without accompanying histologic specificity. 2. Early wide excisional biopsy is imperative for diagnosis. 3. The signs and symptoms of the tumor do not always correlate with the histopathologic diagnosis and subsequent clinical behavior of these tumors. 4. Ceruminous adenoma and pleomorphic adenoma are benign tumors and are best treated only by wide local excision. 5. Adenoid-cystic carcinoma and ceruminous gland adenocarcinoma are pernicious, malignant tumors which are best treated, in general, by an initial aggressive wide en bloc surgical resection or, if there is extension to the middle ear and temporal bone, by resection of the temporal bone and contiguous structures. 6. Postoperative irradiation has an essential role in managing these malignant tumors. 7. Five year survival rates for the malignant tumors do not reflect the biological behavior pattern of "late" local and distant recurrence and metastasis.

Adenocarcinoma↗
PubMed1979

Tympanoplasty using formaldehyde formed fascia grafts.

The closure of total perforations of the tympanic membrane has always been more difficult than lesser eardrum defects. Postoperative anterior sulcus blunting and graft lateralization occur with greater frequency in this situation and thus compromise results. In 1975, Rodney Perkins developed and described a technique for the closure of such total perforations which involved the use of formaldehyde treated temporalis muscle fascia, shaped by means of a metal mold into the configuration of a normal tympanic membrane and medial end of the bony external ear canal. This formaldehyde formed fascia (FFF) graft impressed us with its adaptability and logic. This article is a review of 139 cases involving the use of formaldehyde treated grafts not only for closure of total performations, but also for closure of total performations with concomitant middle ear ossicular reconstruction. The postoperative nonperforation rate in this series is 96.4%; blunting and/or graft lateralization was absent in 94.2% of cases. Closures of the air-bone gap to within 20 db occurred in 74% of cases with an overall gain in hearing for all cases of 84%. We believe that formaldehyde formed fascia grafts are an effective tool for the closure of total tympanic membrane perforations with or without concomitant ossicular chain reconstruction.

Adolescent↗
PubMed1979

Panel discussion: glomus jugulare tumors of the temporal bone. Radiological appearance of glomus tumors.

Depending upon the stage of pathogenesis, some glomus tumors demonstrate characteristic radiographic findings which permit a presumptive diagnosis of this type of tumor. Three factors are helpful in interpreting multidirectional tomography of the temporal bone when a glomus tumor is suspected. The tumor shows a predilection for bony erosion of the carotid crest and hypotympanum. It tends to destroy bone in its path by small lobulated invasions producing a fairly well demarcated border of crescentic shaped translucencies. In contradistinction to other tumors and infections, glomus tumors tend to spare the lateral wall of the attic and the ossicular chain even when the tumor if fairly well advanced in size.

Glomus Jugulare Tumor↗
PubMed1978

Use of plastipore for ossicular chain reconstruction: an evaluation.

With the exception of stapes prostheses, previous use of implantable alloplastic materials in reconstructing the sound conducting mechanism in middle ear surgery has been uniformly unsuccessful. A new material composed of ultra-high molecular weight polyethylene has been developed as a replacement for middle ear ossicles. This implant, called the Plastipore total ossicular replacement prosthesis (TORP), and the Plastipore drum to the stapes prosthesis were inserted in 87 patients, all of whom had a long history of extensive middle ear disease and/or surgery. One TORP patient was lost to follow-up. The overall average hearing gain was 14.8 db. The overall follow-up was 12.4 months with a range of from 3 to 25 months. Eleven of the 15 patients receiving the drum-to-stapes prosthesis had hearing gain; 55 of 71 patients receiving the TORP had hearing gain. Eight prostheses were extruded. Nine patients had no improvement in hearing. Eight patients had subsequent decrease in hearing after initial gains. All ears are now dry and aerated. Early evaluation appears to demonstrate that the Plastipore prosthesis shows promise for use in difficult reconstructive middle ear problems.

Ear Diseases↗
PubMedDate not supplied

The eustachian tube prosthesis revisited.

Preliminary results with an eustachian tube prosthesis have been reported. This paper updates our experience with the prosthesis. Our series is now 95 patients with follow-up of 2 to 32 months (average of 14 months). The success rate in obtaining a healed aerated middle ear is 75% (71). The eustachian tube prosthesis continues to give encouraging results in problem tympanoplasty cases.

Constriction, Pathologic↗