نتایج جستجو برای: anatomic landmarks

تعداد نتایج: 120897  

Journal: :Circulation 1994
E Chu A P Fitzpatrick M C Chin K Sudhir P G Yock M D Lesh

BACKGROUND Radiofrequency catheter ablation requires precise positioning of the ablation electrode. Fluoroscopically guided catheter manipulation has limitations, and there are risks of radiation exposure. The purpose of this study was to examine the feasibility of guiding catheter ablation within the right atrium with catheter-based intracardiac echocardiography. METHODS AND RESULTS A 10F, 1...

Journal: :Journal of orthopaedic trauma 2013
Jeannie Huh Chad A Krueger Michael J Medvecky Joseph R Hsu

OBJECTIVE The optimal exposure interval for anteromedial coronoid fractures is unknown. The purpose of this study was to quantitatively compare the osseous and ligamentous exposure of the medial elbow using the flexor carpi ulnaris (FCU)-Splitting and Hotchkiss Over-the-Top approaches. METHODS Forty surgical approaches were performed on 20 fresh-frozen cadaveric elbows using a randomized cros...

2009
Jai-Gon Seo Byung-Kuk Kim Young-Wan Moon Jong-Hyun Kim Byeong-Ho Yoon Tae-Keun Ahn Dong-Hoon Lee

BACKGROUND There is no accepted landmark for the mechanical axis of the femoral axis in sagittal plane in conventional total knee arthroplasty. METHODS As palpable anatomic landmarks of the femur, lateral epicondyle, and anterior margin of the greater trochanter were identified. The line connecting these two landmarks was defined as the "palpable sagittal axis". The mechanical axis of the fem...

Journal: :iranian endodontic journal 0
leila khojastepour department of oral radiology, dental school, shiraz university of medical sciences, shiraz, iran naser rahimizadeh endodontist, shiraz, iran akbar khayat department of endodontics, dental school, shiraz university of medical sciences, and iranian center for endodontic research, tehran, iran

introduction: knowledge of the anatomic location and dimension of the molar pulp chamber may preserve healthy pulp during operative procedure and reduce risk of perforation of chamber during access preparation. a review of literatures regarding the morphology of pulp chamber however revealed very little information; so the aim of this in vivo study was to measure the dimensions of first molar p...

2016
Mohammad Javed Ali Milind N Naik Chetan Mallikarjuniah Girish Mohammad Hasnat Ali Swathi Kaliki Tarjani Vivek Dave Gautam Dendukuri

AIM The aim of this study was to assess the anatomical accuracy of navigation technology in localizing defined anatomic landmarks within the orbit with respect to type of technology (optical versus electromagnetic systems) and position of the dynamic reference marker on the skull (vertex, temporal, parietal, and mastoid) using in vitro navigation-enabled human skulls. The role of this model as ...

Journal: :The Laryngoscope 2013
Chwee Ming Lim Vikas Mehta Raymond Chai Carlos-Neto D Pinheiro Tanya Rath Carl Snyderman Umamaheswar Duvvuri

OBJECTIVES/HYPOTHESIS To evaluate the transoral anatomy of the tonsillar fossa and lateral pharyngeal wall and to correlate these findings with radiographic measurements and transoral robotic surgery (TORS) of patients with early tonsillar tumor. STUDY DESIGN Preclinical cadaveric study and patient cohort. METHODS Six complete cadaveric dissections were performed to identify key anatomic la...

2012
Ki Deok Park Ji Hae Lee Yongbum Park

OBJECTIVE To identify the volumes of contrast material needed to reach the specific landmarks and contrast pattern during Kambin's triangle approach (KB-A) in lumbar spinal stenosis. METHOD Sixty patients undergoing KB-A were investigated. Fifty-six patients were included in this study. KB-A were performed with the use of contrast-enhanced fluoroscopic visualization. After confirming the appr...

Journal: :AJNR. American journal of neuroradiology 1996
E R Melhem P J Oliverio M L Benson D A Leopold S J Zinreich

PURPOSE To evaluate the optimal parameters for the CT examination of patients who are having functional endoscopic sinus surgery. METHODS CT scanning was performed on two fresh cadaveric heads in the direct coronal plane, varying the section thickness, intersection gap, scanner gantry angle, and amperage. The nasal cavity and paranasal sinuses were examined independently in a blinded fashion ...

2017
Anne K. Maxwell Henry P. Barham Anne E. Getz Todd T. Kingdom Vijay R. Ramakrishnan

BACKGROUND Transnasal endoscopic sphenopalatine artery ligation is becoming the procedure of choice for surgical management of intractable posterior epistaxis. Landmarks for localization of the sphenopalatine foramen can assist in rapid surgical exposure of the sphenopalatine artery. OBJECTIVE This study examined distances from easily identified endoscopic surgical landmarks to the sphenopala...

Journal: :Arquivos de neuro-psiquiatria 2011
Henrique Faria Ramos Tatiana Alves Monteiro Carlos Diógenes Pinheiro Neto Pedro Paulo Mariani Felipe Sartor Guimarães Fortes Luiz Ubirajara Sennes

UNLABELLED The productive work between otolaryngologists and neurosurgeons has resulted in the emergence of endoscopic endonasal skull base surgery. The goal of the present study is to describe the endoscopic anatomy of the endonasal approach to the sellar region and planum sphenoidale, highlighting the key points of the surgical approach and the neurovascular landmarks. METHOD Descriptive st...

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