| Usefulness of Cone-Beam Computed Tomography in Determining the Position of Ossicular Prostheses: A Cadaveric Model. | |
| | |
MedLine Citation:
|
PMID: 21897321 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
HYPOTHESIS:: Cone-beam computed tomography (CT) is proving useful in various operative settings. We hypothesize that it has great potential as an intraoperative assessment tool for ossicular prosthesis positioning. BACKGROUND:: Results from prosthetic ossiculoplasty are frequently disappointing. Undetected intraoperative displacement of the prosthesis may be caused, and obscured, by placement of an overlying cartilage graft. METHODS:: A cadaveric right temporal bone was prepared with a tympanomeatal flap, and an extended posterior tympanotomy through a cortical mastoidectomy. Each of 3 commercially available prostheses was positioned in 3 different locations: 1) optimal, 2) grossly displaced, and 3) marginally displaced. The intended prosthetic positions were confirmed by endoscopy before and after cone-beam CT image acquisition. The primary outcome measure was the position of the prosthesis in relation to the stapes and tympanic membrane, as assessed by 5 expert reviewers blinded to the study. Secondary outcome measures included optimal dosing for adequate image resolution and radiographic scatter associated with different prosthetic materials. RESULTS:: Cone-beam CT accurately demonstrated the position of ossicular reconstruction prostheses with respect to the stapes and tympanic membrane. Prosthesis displacement, whether minimally or marked, was also accurately demonstrated. Interobserver agreement among the 5 reviewers, measured using a Fleiss κ statistic, ranged from 0.4 to 0.8 (fair to substantial agreement depending on type and position of the prosthesis). CONCLUSION:: Cone-beam CT is a useful tool for determining the position of ossicular reconstruction prostheses in situ. We suggest it has potential for intraoperative assessment, to check positioning after the prosthesis has been covered with a cartilage graft and tympanomeatal flap. |
| | |
Authors:
|
Eric Monteiro; Prodip Das; Michael Daly; Harley Chan; Jonathan Irish; Adrian James |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-9-3 |
Journal Detail:
|
Title: Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology Volume: - ISSN: 1537-4505 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
|
Created Date: 2011-9-7 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 100961504 Medline TA: Otol Neurotol Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
*Department of Otolaryngology-Head and Neck Surgery, University of Toronto; †Department of ENT, Brighton and Sussex University Hospitals, Royal Sussex County Hospital, Brighton, U.K.; ‡Department of Otolaryngology-Head and Neck Surgery, Ontario Cancer Institute, Princess Margaret Hospital; §Department of Otolaryngology-Head and Neck Surgery, University Health Network; and ∥Department of Otolaryngology-Head and Neck Surgery, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Treatment of the Atretic Ear With Round Window Vibrant Soundbridge Implantation in Infants and Child...
Next Document: Hyperventilation-Induced Nystagmus and Vertigo After Stereotactic Radiotherapy for Vestibular Schwan...