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Anatomy paranasal sinus

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https://www.readbyqxmd.com/read/27906848/calculation-of-an-optic-nerve-injury-risk-profile-before-sphenoid-sinus-surgery
#1
Erdem Atalay Cetinkaya, Koray Koc, Mehmet Fatih Kucuk, Pinar Koc, Nuray Bayar Muluk, Cemal Cingi
OBJECTIVES: Our objective was to analyze variations in the optic nerve (ON) course and surrounding structures in an effort to construct an optic nerve injury risk profile before endoscopic intranasal sphenoidal, or endoscopic endonasal transphenoidal, skull-base surgery, and eventually to construct and formulate a common classification by combining the known classes. The authors used computed tomography (CT) toward this end. METHODS: The authors retrospectively reviewed 200 consecutive CT scans (400 sides) of the paranasal sinuses...
November 30, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27890187/imaging-of-paranasal-sinuses-and-anterior-skull-base-and-relevant-anatomic-variations
#2
REVIEW
Estushi Iida, Yoshimi Anzai
This article reviews the normal anatomy and variants of the anterior skull base and sinonasal cavities that are relevant to endoscopic sinus and skull base surgery. Radiologists should be aware of sinonasal anatomy that can be impediments to surgical access and increase risk of vascular or cranial nerve injury during surgery. Imaging features of the paranasal sinuses and anterior skull base pathologies are also discussed.
January 2017: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/27754596/educational-utility-of-advanced-three-dimensional-virtual-imaging-in-evaluating-the-anatomical-configuration-of-the-frontal-recess
#3
Abib Agbetoba, Amber Luong, Jin Keat Siow, Brent Senior, Claudio Callejas, Kornel Szczygielski, Martin J Citardi
BACKGROUND: Endoscopic sinus surgery represents a cornerstone in the professional development of otorhinolaryngology trainees. Mastery of these surgical skills requires an understanding of paranasal sinus and skull-base anatomy. The frontal sinus is associated with a wide range of variation and complex anatomical configuration, and thus represents an important challenge for all trainees performing endoscopic sinus surgery. METHODS: Forty-five otorhinolaryngology trainees and 20 medical school students from 5 academic institutions were enrolled and randomized into 1 of 2 groups...
October 18, 2016: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/27752754/visualization-of-anatomy-in-normal-and-pathologic-middle-ears-by-cone-beam-ct
#4
Christian Güldner, Isabell Diogo, Eva Bernd, Stephanie Dräger, Magis Mandapathil, Afshin Teymoortash, Hesham Negm, Thomas Wilhelm
Cone beam computed tomography (CBCT, syn. digital volume tomography = DVT) was introduced into ENT imaging more than 10 years ago. The main focus was on imaging of the paranasal sinuses and traumatology of the mid face. In recent years, it has also been used in imaging of chronic ear diseases (especially in visualizing middle and inner ear implants), but an exact description of the advantages and limitations of visualizing precise anatomy in a relevant number of patients is still missing. The data sets of CBCT imaging of the middle and inner ear of 204 patients were analyzed regarding the visualization of 18 different anatomic structures...
October 17, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27712907/classic-signs-in-head-and-neck-imaging
#5
N A Koontz, T A Seltman, S F Kralik, K M Mosier, H R Harnsberger
Radiologists have long relied upon the use of metaphoric imaging signs to attribute meaning to disease or anatomy-specific imaging patterns encountered in clinical imaging. Teachers of radiology often employ the use of such signs to help learners rapidly identify the typical appearance of various pathologies. Head and neck (H&N) imaging is no exception, and as a specialty that deals with uncommon pathologies and complex anatomy, learners and practising radiologists alike may benefit from this simplistic, pattern-based approach...
October 3, 2016: Clinical Radiology
https://www.readbyqxmd.com/read/27614624/concha-bullosa-in-paleoanthropological-material
#6
A Gawlikowska-Sroka, J Szczurowski, B Kwiatkowska, P Konczewski, E Dzieciołowska-Baran, M Donotek, A Walecka, D Nowakowski
Concha bullosa is a variant of the sinonasal anatomy in which the middle nasal turbinate contains pneumatized cells, which leads to turbinate enlargement. The reason for concha bullosa formation is unclear, but the variant is seen in up to half the modern population and it may predispose to paranasal sinusitis. The variant has hitherto featured little in paleopathology. Therefore, in the present study we seek to determine the presence of concha bullosa, with the coexisting hypertrophy of the middle turbinate and signs of sinusitis or other pathology of the paranasal complex, in a population living in Tomersdorf-Toporow in the Upper Lausatia, a historical region in Germany and Poland, presently Zgorzelec County in the Lower Silesian voivodeship, at the turn of the nineteenth and twentieth century...
September 11, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27466853/delivery-of-topical-therapies
#7
Kristine A Smith, Luke Rudmik
Chronic rhinosinusitis with nasal polyposis (CRSwNP) is an inflammatory disease of the sinonasal passages. Similar to other chronic inflammatory diseases, an essential component of the long-term control is prolonged medical therapy. To minimize the risk of adverse effects and cumulative complications of systemic medications, topical sinonasal therapy has become the primary strategy for prolonged medical therapy. The objective of this review article is to describe the evidence for the most common topical sinonasal delivery techniques...
2016: Advances in Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27300298/is-there-a-relationship-between-sphenoid-sinus-types-septation-and-symmetry-and-septal-deviation
#8
Mehmet Hüseyin Akgül, Nuray Bayar Muluk, Veysel Burulday, Ahmet Kaya
In the present study, we investigated whether there is a relationship between sphenoid sinus (SS) types, septation (lobulation) and symmetry; and septal deviation (SD) by multidetector computed tomography (MDCT). Paranasal MDCT images of 202 subjects (131 males, 71 females), between 10- and 88-year-old, were included into the study. SS type (conchal, presellar or sellar), SS symmetry, SS septation (lobulation) and SD were evaluated by MDCT images. In the present study, in both males (83.2 %) and females (85...
June 14, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27239601/combined-external-and-endonasal-approach-to-fronto-ethmoidal-mucocele-involving-the-orbit
#9
Bijan Beigi, Deepak Vayalambrone, Mohsen Bahmani Kashkouli, Peter Prinsley, Jan Saada
PURPOSE: To present a technique to improve the surgical treatment of frontal sinus mucocele and its recurrence. METHODS: Nine procedures performed on eight patients by a team of ENT and Ophthalmic orbital surgeons. Data collected included patient demographics, surgical details, pathological findings and complications. The surgical technique involved an external approach via the upper eyelid skin crease combined with an internal approach with a rigid 4 mm endoscope described below...
March 2016: Journal of Current Ophthalmology
https://www.readbyqxmd.com/read/27192983/usefulness-of-three-dimensional-computed-tomographic-anatomy-in-endoscopic-frontal-recess-surgery
#10
Paolo Farneti, Anna Riboldi, Vittorio Sciarretta, Ottavio Piccin, Paolo Tarchini, Ernesto Pasquini
PURPOSE: The endoscopic bidimensional vision offered by the endoscope during endoscopic sinus surgery involves difficulty in visualizing surgical field depth which makes it difficult to learn this surgical technique and makes it necessary for the endoscopic surgeon to mentally create a three-dimensional (3D) picture of the paranasal sinuses anatomy. In particular, frontal recess surgery requires good knowledge of its anatomic position, also since it is necessary to use angled endoscopes, which distort the view, and angular instruments which are difficult to use...
May 18, 2016: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/27178523/ex-vivo-ovine-model-for-head-and-neck-surgical-simulation
#11
David C Ianacone, Beverly J Gnadt, Glenn Isaacson
OBJECTIVE: To evaluate a fresh, ovine/sheep head and neck tissue model to teach otolaryngology-head and neck surgical techniques. STUDY DESIGN: Observational animal study. SETTING: A university animal resource facility. METHODS: Tissue was collected from pre-pubescent sheep (n=10; mean age: 4months; mean mass: 28kg) following humane euthanasia at the end of an in vivo protocol. No live animals were used in this study...
May 2016: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/27146614/radiological-sinonasal-anatomy-exploring-the-saudi-population
#12
Redha A Alrumaih, Mona M Ashoor, Ahmed A Obidan, Khulood M Al-Khater, Saeed A Al-Jubran
OBJECTIVES: To assess the prevalence of common radiological variants of sinonasal anatomy among Saudi population and compare it with the reported prevalence of these variants in other ethnic and population groups.  METHODS: This is a retrospective cross-sectional study of 121 computerized tomography scans of the nose and paranasal sinuses of patients presented with sinonasal symptoms to the Department of Otorhinolarngology, King Fahad Hospital of the University, Khobar, Saudi Arabia, between January 2014 and May 2014...
May 2016: Saudi Medical Journal
https://www.readbyqxmd.com/read/27116124/radiological-assessment-of-the-anatomy-of-frontal-recess-cells-and-the-anterior-ethmoidal-artery
#13
Tsuyoshi Okuni, Kenichi Takano, Kazuaki Nomura, Keiji Yamashita, Ayumi Abe, Fumie Ito, Kosuke Murayama, Hideaki Shirasaki, Tetsuo Himi
It is necessary for the surgeon to be familiar with frontal recess anatomy during an endoscopic approach to the frontal sinuses. The aim of this study was to evaluate the prevalence of frontal recess cells in Japanese adults as well as the association between the frontal recess and the location of the anterior ethmoidal artery (AEA). The frontal recess cells and the AEAs were retrospectively evaluated in CT scans of the nasal and paranasal sinuses for 89 patients. The prevalence of agger nasi cells was 90.7%...
2016: Advances in Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27093827/-the-progress-of-research-about-anatomy-of-posterolateral-wall-of-maxillary-sinus-in-endoscopic-surgery
#14
REVIEW
Li Gao, Xinsheng Huang
As an important landmark, the posterolateral wall of maxillary sinus can help to locate numbers of significant signs such as maxillary artery and its branches, maxillary nerve and infraorbital nerve, infratemporal fossa and pterygopalatine fossa etc. in the endoscopic surgery for paranasal sinuses and lateral skull base. This article reviewed related researches about the anatomy and endoscopic surgery of posterolateral wall of maxillary sinus.
December 2015: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/27028583/differences-in-the-paranasal-sinuses-between-germ-free-and-pathogen-free-mice
#15
Ravi Jain, Sharon Waldvogel-Thurlow, Richard Darveau, Richard Douglas
BACKGROUND: The role of bacteria in the etiology of chronic rhinosinusitis (CRS) is not fully understood. Commensal bacteria may have a significant impact on the development of normal paranasal sinus anatomy and mucosal immunity, as they do in the gut. Studying the paranasal sinuses of germ-free (GF) mice may provide some insight into the effect of commensal bacteria on sinus structure and mucosal function. METHODS: The paranasal sinuses of 5 GF mice were compared to 5 pathogen-free normal mice...
June 2016: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/26966706/normal-variations-of-sphenoid-sinus-and-the-adjacent-structures-detected-in-cone-beam-computed-tomography
#16
Azadeh Rahmati, Roshanak Ghafari, Maryam AnjomShoa
STATEMENT OF THE PROBLEM: The sphenoid sinus is a common target of paranasal surgery. Functional endoscopic sinus surgery is likely to endanger the anatomic variations of vital structures adjacent to the sphenoid sinus. PURPOSE: The aim of this study was to determine the variations of sphenoid sinus and the related structures by using cone-beam computed tomography (CBCT). MATERIALS AND METHOD: In this descriptive-analytic study, CBCT images of 103 patients aged above 20-years were selected (206 sides)...
March 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/26898064/additive-manufacturing-of-medical-models-applications-in-rhinology
#17
Pero Raos, Ivica Klapan, Tomislav Galeta
In the paper we are introducing guidelines and suggestions for use of 3D image processing SW in head pathology diagnostic and procedures for obtaining physical medical model by additive manufacturing/rapid prototyping techniques, bearing in mind the improvement of surgery performance, its maximum security and faster postoperative recovery of patients. This approach has been verified in two case reports. In the treatment we used intelligent classifier-schemes for abnormal patterns using computer-based system for 3D-virtual and endoscopic assistance in rhinology, with appropriate visualization of anatomy and pathology within the nose, paranasal sinuses, and scull base area...
September 2015: Collegium Antropologicum
https://www.readbyqxmd.com/read/26700263/cone-beam-ct-paranasal-sinuses-versus-standard-multidetector-and-low-dose-multidetector-ct-studies
#18
COMPARATIVE STUDY
Janan Al Abduwani, Laura ZilinSkiene, Steve Colley, Shahzada Ahmed
UNLABELLED: Cone-beam computed tomography (CBCT) is a promising modality for quick outpatient imaging with lower radiation dose and less metal artifact when compared to conventional CT (MDCT) scans. This article will be providing evidence on the diagnostic and treatment-planning applications of CBCT in sinus imaging, mainly, in patients with chronic sinusitis for surgical planning, which retrospectively assessed 21 patients over a period of one year at Queen Elisabeth Hospital, Birmingham, UK...
January 2016: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/26585864/anatomical-and-histological-study-of-the-dorsal-and-ventral-nasal-conchal-bullae-in-normal-horses
#19
T J Froydenlund, P M Dixon, S H Smith, R J M Reardon
The morphology of the dorsal conchal bulla (DCB) and ventral conchal bulla (VCB) are poorly described. The recent recognition that these bullae can become infected, causing chronic unilateral nasal discharge, has stimulated interest in these structures. Fourteen cadaveric horse heads were transected sagittally midline and dissected to expose the nasal conchal bullae. The dimensions of each bulla, the number and orientation of drainage apertures, and cellulae septae were recorded. Randomly selected samples were examined histologically...
November 28, 2015: Veterinary Record
https://www.readbyqxmd.com/read/26546843/is-le-fort-i-osteotomy-associated-with-maxillary-sinusitis
#20
COMPARATIVE STUDY
Pier Francesco Nocini, Antonio D'Agostino, Lorenzo Trevisiol, Vittorio Favero, Mattia Pessina, Pasquale Procacci
PURPOSE: The purpose of the present study was to investigate the association between Le Fort I osteotomy and the anatomic, radiologic, and symptomatic modifications of the maxillary sinus. MATERIALS AND METHODS: Subjects who had undergone Le Fort I osteotomy from January 2008 to December 2013 were enrolled in a retrospective cohort study. The eligibility criteria were the availability of a cone beam computed tomography (CBCT) scan taken before and 12 to 24 months after the procedure...
February 2016: Journal of Oral and Maxillofacial Surgery
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