نتایج جستجو برای: mastoid segment

تعداد نتایج: 84545  

Journal: :Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology 2009
Naoaki Yanagihara Masahiro Komori Yasuyuki Hinohira

OBJECTIVE To assess middle ear aeration after total mastoid obliteration using bone pate and hydroxyapatite performed at the second stage of intact-canal-wall (ICW) tympanoplasty. STUDY DESIGN Retrospective study. SETTING Tertiary referral hospital. PATIENTS Forty-two ears with cholesteatoma underwent the obliteration. Computed tomography (CT) scan 1 week before the second-stage operation...

Journal: :Indian Journal of Otolaryngology and Head & Neck Surgery 2011

Journal: :Journal of applied physiology 2012
Alexander S Zhang Sendhil Govender James G Colebatch

Ocular vestibular evoked myogenic potentials (oVEMPs) are a recently described clinical measure of the vestibulo-ocular reflex. Studies demonstrating differences in frequency tuning between air-conducted and bone-conducted (BC) oVEMPs suggest a separate vestibular (otolith) origin for each stimulus modality. In this study, 10 healthy subjects were stimulated with BC stimuli using a hand-held mi...

Journal: :The Laryngoscope 2005
Bruce J Gantz Eric P Wilkinson Marlan R Hansen

OBJECTIVES This study was designed to evaluate the authors' experience with canal wall reconstruction (CWR) tympanomastoidectomy with mastoid obliteration in the treatment of chronic otitis media with cholesteatoma. STUDY DESIGN Institutional review board approved retrospective case review. METHODS Retrospective review was performed of all patients undergoing CWR tympanomastoidectomy with m...

Journal: :The Laryngoscope 2003
Leslie Wilson Eddie Lin Anil Lalwani

OBJECTIVES Despite the utility of intraoperative facial nerve monitoring in reducing the risk of iatrogenic facial nerve injury during neurotologic surgery, its routine use during primary or revision surgery remains controversial. One of the major barriers to its acceptance is cost. This study evaluates the cost-effectiveness of intraoperative facial nerve monitoring during middle ear or mastoi...

2015
Hanaro Park Seung No Hong Hyo Sang Kim Jae Joon Han Juyong Chung Myung-Whan Seo Seung-Ha Oh Sun-O Chang Jun Ho Lee

OBJECTIVES Tympanic membrane perforations are common, but there have been few studies of the factors determining the extent of the resulting conductive hearing loss. The aims of this study were to determine whether the size of tympanic membrane perforation, pneumatization of middle ear & mastoid cavity, and location of perforation were correlated with air-bone gap (ABG) of patients. METHODS F...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز 1380

توارث پذیری پارامترهای فیزیولوژیک قلب و عروق در یکصد و هفت جفت دختران 16 تا 19 ساله و مادران 32 تا 56 ساله در شهر شیراز بوسیله آنالیز الکتروکاردیوگرام و فشار خون مطالعه گردید. در این مطالعه سهم عوامل وراثتی در بعضی از شاخص های الکتروکاردیوگرام مانند فاصله ‏‎(rp, interval)rp‎‏ ، موج ‏‎p‎‏، کمپلکس ‏‎qrs‎ ، فاصله ‏‎qt‎‏ تصحیح شده ‏‎(qtc)‎‏، قطعه ‏‎(rp-segment)rp‎‏ ، تغییرات فشار خون و شاخص های آنت...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده شیمی 1393

الاستومرهای پلی اورتان، سیستم های کوپلیمری هستند که در زنجیر پلیمری آن ها قسمت های سخت (hard segment) و قسمت های نرم (soft segment) به صورت متناوب، در کنار هم قرار می گیرند.در پروژه حاضر، دی ایزوسیانات ها که جزء اصلی تهیه الاستومر پلی اورتان می باشد، خواص فیزیکی و شیمیایی آن با انجام آنالیزهای شیمیایی(nco number،....) و تکنیک ftir مورد مطالعه قرار گرفت. در ادامه کار با استفاده از پلی ال های گیا...

Journal: :International journal of clinical and experimental medicine 2015
Xi-Dong Hu Ting-Ting Wu Shui-Hong Zhou

Squamous cell carcinoma of the middle ear (SCCME) accounts for 1.5% of malignant tumors in the ear. Because of the low incidence and infrequent reports of SCCME, the extent of concordance between CT and MRI results, surgical findings, and pathology reports are not well-characterized. In the present study, we reported CT and MRI images in three SCCME cases, and assessed the relationship between ...

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