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https://www.readbyqxmd.com/read/28070228/design-fabrication-and-testing-of-a-needle-sized-wrist-for-surgical-instruments
#1
Philip J Swaney, Peter A York, Hunter B Gilbert, Jessica Burgner-Kahrs, Robert J Webster
This paper presents a miniature wrist that can be integrated into needle-sized surgical instruments. The wrist consists of a nitinol tube with asymmetric cutouts that is actuated by a single tendon to provide high distal curvature. We derive and experimentally validate kinematic and static models for the wrist and describe several prototype wrists, illustrating the straightforward fabrication and scalability of the design. We experimentally investigate fatigue life, the concept of tip-first bending, and practical use of the wrist with a concentric tube robot in an endonasal surgical scenario...
March 2017: Journal of Medical Devices
https://www.readbyqxmd.com/read/28045816/risk-factors-predicting-nasoseptal-flap-failure-in-the-endoscopic-endonasal-transsphenoidal-approach
#2
Boo-Young Kim, Ji Hyeon Shin, Sung Won Kim, Yong Kil Hong, Sin-Soo Jeun, Soo Whan Kim, Jin Hee Cho, Yong Jin Park
OBJECTIVE: Reconstruction of the skull base using a pedicled nasoseptal flap (NSF) seems to be advantageous after the endoscopic endonasal transsphenoidal approach (EETSA). A few reports have evaluated the cause of flap failure in EETSA using NSFs. The aim of this study was to evaluate the perioperative risk factors for NSF failure. STUDY DESIGN: Patient series. SETTING: Retrospective review of medical records at a tertiary referral center...
December 30, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28033632/aesthetic-rhinoplasty-as-a-surface-contour-operation-from-analysis-to-surgery-personal-concepts
#3
Palma Pietro, Khodaei Iman, Vasilenko Irina
Numerous beautiful rhinoplasty results have been created by closed rhinoplasty techniques over the past 100 years. This operation was mainly a "reduction" surgery. Overaggressive reduction rhinoplasty is not a hallmark of the closed approach per se, but represents the result of inappropriate aesthetic appraisal, inadequate technical execution, or lack of sound anatomical understanding. Clearly, an operation based primarily on reduction intrinsically exposes the surgeon to the possibility of excessive diminution of support structures and consequently undesirable side effects...
December 2016: Facial Plastic Surgery: FPS
https://www.readbyqxmd.com/read/28032687/transnasal-endoscopic-partial-maxillectomy-operative-nuances-and-proposal-for-a-comprehensive-classification-system-based-on-1378-cases
#4
Mario Turri-Zanoni, Paolo Battaglia, Apostolos Karligkiotis, Davide Lepera, Jacopo Zocchi, Iacopo Dallan, Maurizio Bignami, Paolo Castelnuovo
BACKGROUND: Despite the development of functional endoscopic endonasal surgery, there are still areas of the maxillary sinus that remain technically difficult to access using a standard middle meatal antrostomy as well as deep-seated skull base lesions requiring expanded transmaxillary approaches. METHODS: All patients who underwent transnasal endoscopic partial maxillectomy (TEPM) in a single institution from 2000 to 2014 were retrospectively reviewed. The TEPM was classified into 5 types according to the anatomic structures progressively removed and to the access provided...
December 29, 2016: Head & Neck
https://www.readbyqxmd.com/read/28026837/trigeminal-sensitivity-in-chronic-rhinosinusitis-topographical-di-erences-and-the-e-ect-of-surgery
#5
S C Poletti, M Cuevas, S Weile, T Hummel
INTRODUCTION: Little is known on endonasal trigeminal sensitivity in patients with chronic rhinosinusitis with nasal polyps (CRSwNP). The aim of our study was to investigate changes in trigeminal sensitivity in patients with CRSwNP and the effect of functional endoscopic sinus surgery (FESS) on trigeminal perception. METHODS: A prospective study was performed to investigate the trigeminal sensitivity at three different locations within the nose (anterior septum, anterior lateral wall, middle turbinate) using electrical stimuli...
December 27, 2016: Rhinology
https://www.readbyqxmd.com/read/28024972/efficacy-and-complications-of-endoscopic-skull-base-surgery-for-giant-pituitary-adenomas
#6
Shigetoshi Yano, Takuichiro Hide, Naoki Shinojima
OBJECTIVE: Treatment of giant pituitary adenomas is challenging. Endoscopic endonasal skull base surgery (EES) was estimated the surgical results and complication for giant pituitary adenomas. METHODS: Thirty-four pituitary adenomas larger than 40 mm treated by EES between 2002 and 2015 were studied. Removal rates, symptoms, and complications were analyzed by direction of tumor extension. RESULTS: Average tumor size was 45.5 mm. Near-total resection (NTR) was achieved in 16 of 34 (47...
December 23, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/28017744/first-case-of-primary-sellar-suprasellar-intraventricular-ewing-sarcoma-case-report-and-review-of-literature
#7
Pier Paolo Mattogno, Davide Nasi, Corrado Iaccarino, Gabriele Oretti, Luisa Santoro, Antonio Romano
BACKGROUND: Intracranial Ewing Sarcoma (ES) and peripheral primitive neuroectodermal tumors (pPNETs) are extremely rare and poorly differentiated neoplasms. Recent immunohistochemical and cytogenetic findings support the possibility of a unique nosological entity. Primary intracranial localization of this tumor is extremely rare: a small number of cases are reported in the literature, with only a part of them confirmed by genetic studies. CASE DESCRIPTION: We report the case of 12 year-old-patient affected by sellar-suprasellar mass with intraventricular extension that in all its features mimes a transinfundibular craniopharyngioma...
December 22, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/28011356/endoscopic-removal-of-suprasellar-colloid-cyst-with-interpedincular-and-prepontine-cisterns-extension
#8
Caglar Temiz, Murat Kutlay, Mukerrem Safali, Cahit Kural, Can Ezgu, Yusuf Izci
BACKGROUND: Colloid cysts (CC) are rarely found in the sellar-suprasellar region. Differential diagnosis of CC is more challenging in this region because many other cystic lesions may locate or invade sellar or suprasellar structures. We present a large and unusual case of sellar-suprasellar colloid cyst with extension into the suprasellar, interpedincular and prepontine cisterns. This is the first case of sellar-suprasellar colloid cyst treated with endoscopic transsphenoidal approach...
December 21, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/28009229/transoral-robotic-surgery-for-sellar-tumors-first-clinical-study
#9
Dorian Chauvet, Stéphane Hans, Antoine Missistrano, Celeste Rebours, Wissame El Bakkouri, Guillaume Lot
OBJECTIVE The aim of this study was to confirm the feasibility of an innovative transoral robotic surgery (TORS), using the da Vinci Surgical System, for patients with sellar tumors. This technique was designed to offer a new minimally invasive approach, without soft-palate splitting, that avoids the rhinological side effects of classic endonasal approaches. METHODS The authors performed a prospective study of TORS in patients with symptomatic sellar tumors. Specific anatomical features were required for inclusion in the study and were determined on the basis of preoperative open-mouth CT scans of the brain...
December 23, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28005798/simultaneous-bilateral-endonasal-endoscopic-dacryocystorhinostomy-a-low-cost-fast-and-successful-method
#10
Cem Bayraktar, Ayşe Sevgi Karadağ, Sedat Doğan, Ali Şimşek, Emin Kaskalan, Musa Çapkin
The etiology of primary nasolacrimal duct obstruction is largely unknown, and this disease may occur bilaterally in a small percentage of patients. In this retrospective study, the authors aimed to discuss the cost, operation time, complications, and success rate of simultaneous bilateral endonasal endoscopic surgery. Twenty-eight patients (16 female, 12 male) were enrolled in this study, with a mean age of 55 years old (range: 43-76). The success rate was 91% (51/56), and the mean operation time was 44 minutes...
November 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28005730/correction-of-a-long-face-simultaneous-reduction-of-the-upper-lip-using-a-modified-endonasal-technique-and-le-fort-i-osteotomy-superior-impaction
#11
Seungil Chung, Sanghoon Park
BACKGROUND: Although Le Fort I osteotomy superior impaction during bimaxillary surgery is beneficial for patients with a long face, achieving satisfactory results can be challenging due to the redundant upper lip. However, upper-lip reduction has rarely been performed during or following bimaxillary surgery because of the difficulty in estimating the required amount of cutaneous resection needed and the apparent horizontal scars left behind. Therefore, no simultaneous cutaneous upper-lip reduction with orthognathic surgery has been reported...
November 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28003168/endoscopic-endonasal-surgery-for-remission-of-cushing-disease-caused-by-ectopic-intracavernous-macroadenoma-case-report-and-literature-review
#12
Maria Koutourousiou, Welby I Winstead
BACKGROUND: Complete surgical resection of an adrenocorticotropic hormone (ACTH)-secreting pituitary adenoma is the gold standard of treatment of Cushing disease. Ectopic location of these adenomas is an extremely rare condition that may compromise the diagnosis and surgical success. We present the first case of an ectopic intracavernous ACTH-secreting macroadenoma totally resected with endoscopic endonasal surgery (EES). CASE DESCRIPTION: A 36-year-old woman presented with Cushing syndrome...
December 18, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27993737/bolstering-the-nasoseptal-flap-using-sphenoid-sinus-fat-packing-a-technical-case-report
#13
Hussam Abou-Al-Shaar, Hasan A Zaidi, David J Cote, Edward R Laws
BACKGROUND: Resection of extensive skull base lesions often necessitates relatively large dural openings and arachnoid, resulting in skull base defects with the potential for a post-operative cerebrospinal fluid (CSF) leak. A nasoseptal flap (NSF) is a vascularized graft which has greatly diminished the incidence of CSF leak. Annealing of flaps against the ventral skull base can be tenuous within the first few days after surgery. We report the use of sphenoid sinus fat packing as a buttress to support the nasoseptal flap during skull base reconstruction...
December 16, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27989971/neurophysiological-identification-of-cranial-nerves-during-endoscopic-endonasal-surgery-of-skull-base-tumors-a-pilot-study-technical-report
#14
Alexey Nikolaevich Shkarubo, Anna Anatolievna Ogurtsova, Dmitry Aleksandrovich Moshchev, Andrew Jurievich Lubnin, Dmitry Nicolaevich Andreev, Konstantin Vladimirovich Koval, IliaValerievich Chernov
INTRODUCTION: Intraoperative identification of cranial nerves is crucial for safe surgery of skull base tumors. Currently, there is only a small number of published papers describing the technique of t-EMG in endoscopic endonasal removal of such tumors. OBJECTIVE: To assess the effectiveness of trigger electromyography in preventing intraoperative cranial nerve damage in endoscopic endonasal surgery of skull base tumors. MATERIALS AND METHODS: Nine patients were operated on using the endoscopic endonasal approach within a one-year period...
October 27, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27988033/magnetic-resonance-imaging-and-histology-correlation-in-cushing-s-disease
#15
Václav Masopust, David Netuka, Vladimír Beneš, Martin Májovský, Tomáš Belšán, Ondřej Bradáč, Daniel Hořínek, Mikuláš Kosák, Václav Hána, Michal Kršek
INTRODUCTION: We continuously look for new techniques to improve the radicality of resection and to eliminate the negative effects of surgery. One of the methods that has been implemented in the perioperative management of Cushing's disease was the combination of three magnetic resonance imaging (MRI) sequences: SE, SPGR and fSPGR. MATERIAL AND METHODS: We enrolled 41 patients (11 males, 30 females) diagnosed with Cushing's disease. A 3D tumour model with a navigation console was developed using each SPGR, fSPGR and SE sequence...
November 2, 2016: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/27975017/endoscopic-adipofascial-radial-forearm-flap-reconstruction-of-a-clival-defect
#16
Trevor G Hackman
Skull base surgical defects present unique challenges to anatomic and functional reconstruction. Fortunately, many endonasal skull base defects are successfully managed with a variety of local and regional reconstructive techniques. However, when prior surgery or radiotherapy eliminates the use of these local and regional reconstructive options, more elaborate free tissue transfer techniques are required. Managing endoscopic skull base defects of the anterior cranial fossa and clivus is further complicated by the limited access afforded for flap inset...
November 2016: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/27965073/outcomes-of-endonasal-and-lateral-approaches-to-petroclival-meningiomas
#17
Maria Koutourousiou, Juan C Fernandez-Miranda, Francisco Vaz Guimaraes Filho, John R de Almeida, Eric W Wang, Carl H Snyderman, Paul A Gardner
OBJECT: Transpetrosal approaches for the treatment of petroclival meningiomas are often associated with substantial morbidity and long recovery. With the goal of early clinical improvement, we have employed less invasive surgical approaches for petroclival meningiomas. METHODS: We retrospectively reviewed 32 patients with petroclival meningiomas. Eleven patients (34.4%) were managed with lateral approaches (retrosigmoid or far lateral approach), 17 (53.1%) with anterior midline approaches (endoscopic endonasal approach [EEA]) and 4 (12...
December 10, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27957368/transnasal-transethmoidal-endoscopic-removal-of-a-foreign-body-in-the-medial-extraconal-orbital-space
#18
Diego Escobar Montatixe, José Miguel Villacampa Aubá, Álvaro Sánchez Barrueco, Beatriz Sobrino Guijarro, Carlos Cenjor Español
Intraorbital foreign bodies are located within the orbit but outside the ocular globe. Though not uncommon, removal of these objects poses a challenge for surgeons. External approaches have been the most frequently used but are associated with increased complications and morbidity. An endoscopic endonasal approach can be an appropriate and less complicated technique in these cases. We report a case of a chronic intraorbital foreign body located within the medial extraconal space lateral to the lamina papyracea and behind the lacrimonasal duct, which was successfully removed using a transnasal, transethmoidal endoscopic technique...
2016: Case Reports in Otolaryngology
https://www.readbyqxmd.com/read/27942886/modified-technique-for-endoscopic-endonasal-reduction-of-medial-orbital-wall-fracture-using-an-absorbable-packing
#19
Pasquale Procacci, L Trevisiol, P F Nocini, V Favero, A D'Agostino
PURPOSE: The purpose of this study was to describe a modified technique using only biological dura substitute (Lyoplant®) associated or not to a sheet of Medpore® (porous polyethylene plate) avoiding the use of Silastic® or Merocel® packing for endoscopic endonasal reduction of medial orbital wall fracture. METHODS: An interventional case report was used involving two patients with medial orbital wall fracture that were treated with the modified technique. Postoperatively, the patients were evaluated for visual acuity, enophthalmos, extraocular motility, and diplopia...
December 10, 2016: Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27938977/staged-endonasal-external-resection-of-esthesioneuroblastoma-involving-the-nasolacrimal-duct-and-lacrimal-sac
#20
Michel J Belliveau, James C M Wang, Navdeep Nijhawan, Eleanor K Latta, John M Lee
No abstract text is available yet for this article.
December 2016: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
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