Abstract:
CONCLUSIONS:Polytetrafluoroethylene (PTFE) may represent a material that prevents adhesions when implanted in the middle ear. This characteristic can be used to improve the design of prostheses. OBJECTIVE:Prostheses in the middle ear have a relatively high failure rate due to extrusion, deformation and adhesion. Adhesion of prostheses to the walls of the tympanic cavity is the commonest cause of long-term hearing loss. The anti-adhesive properties of PTFE have been previously studied in abdominal and vascular surgery. To the best of our knowledge, this is the first work in which the properties of PTFE have been studied in the context of middle ear pathology. MATERIAL AND METHODS:In order to induce otitis media with effusion, 27 Wistar rats underwent a technique based on permanent cauterization of the pharyngeal Eustachian tube. PTFE was subsequently implanted in the middle ear. Rats that underwent cauterization without implantation and cauterization with implantation of hydroxyapatite and Plastipore were included as controls. RESULTS:Histopathological study of the tympanic bullae at 15 and 90 days after implantation demonstrated good biocompatibility of the PTFE implant under the analyzed conditions, with formation of a capsule around the material and no adhesions between the ear tissues and the prosthesis.
journal_name
Acta Otolaryngoljournal_title
Acta oto-laryngologicaauthors
Vicente J,Ramírez-Camacho R,Trinidad A,Ramón García-Berrocal J,Lobo D,Pinilla Mdoi
10.1080/00016480500312570subject
Has Abstractpub_date
2006-02-01 00:00:00pages
144-8issue
2eissn
0001-6489issn
1651-2251pii
G613V93453032111journal_volume
126pub_type
杂志文章abstract::Malignant laryngeal tumours with spindle-cell morphology are relatively rare. Differential diagnosis of spindle-cell carcinoma, leiomyosarcoma, fibrosarcoma, rhabdomyosarcoma, malignant melanoma and inflammatory myofibroblastic tumour may be particularly difficult. Ambiguous and indeterminate diagnoses are also possib...
journal_title:Acta oto-laryngologica
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abstract:CONCLUSIONS:Concurrent chemoradiotherapy with carboplatin and uracil-f tegafur (UFT) seems to be a promising and appropriate regimen for patients with poor performance status (PS) with locally advanced squamous cell carcinoma of the head and neck (SCCHN). OBJECTIVE:We designed a regimen based on divided low-dose admin...
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