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https://www.readbyqxmd.com/read/28421875/three-dimensional-printing-and-its-applications-in-otorhinolaryngology-head-and-neck-surgery
#1
Trevor D Crafts, Susan E Ellsperman, Todd J Wannemuehler, Travis D Bellicchi, Taha Z Shipchandler, Avinash V Mantravadi
Objective Three-dimensional (3D)-printing technology is being employed in a variety of medical and surgical specialties to improve patient care and advance resident physician training. As the costs of implementing 3D printing have declined, the use of this technology has expanded, especially within surgical specialties. This article explores the types of 3D printing available, highlights the benefits and drawbacks of each methodology, provides examples of how 3D printing has been applied within the field of otolaryngology-head and neck surgery, discusses future innovations, and explores the financial impact of these advances...
November 1, 2016: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28418700/three-dimensional-analysis-of-upper-airway-morphology-in-skeletal-class-iii-patients-with-and-without-mandibular-asymmetry
#2
Xi Wen, Xiyu Wang, Shuqi Qin, Lorenzo Franchi, Yan Gu
OBJECTIVE: To compare the three-dimensional (3D) morphology of the upper airway in skeletal Class III patients with and without mandibular asymmetry and to investigate the possible underlying correlations between the morphology of the upper airway and mandibular deviation. MATERIALS AND METHODS: Cone-beam computed tomography images of 54 subjects with skeletal Class III malocclusion (ANB angle ≤ 0.4°, Wits ≤ -5.5°) were taken and 3D upper airway models were reconstructed using Dolphin 3D software...
April 18, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28418443/inaugural-symposium-on-advanced-surgical-techniques-in-adult-airway-reconstruction-proceedings-of-the-north-american-airway-collaborative-noaac
#3
James J Daniero, Dale C Ekbom, Alexander Gelbard, Lee M Akst, Alexander T Hillel
No abstract text is available yet for this article.
April 13, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28416345/laryngeal-function-preserving-operation-for-t4a-laryngeal-cancer-with-vocal-cord-paralysis-a-case-report
#4
Yukinori Asada, Koreyuki Kurosawa, Ko Matsumoto, Takahiro Goto, Kengo Katoh, Takayuki Imai, Shigeru Saijo, Kazuto Matsuura
For locally advanced laryngeal cancers, the standard treatment of choice is chemoradiotherapy if organ function needs to be conserved. Surgical treatment with larynx preservation is conducted only for limited cases. For locally advanced laryngeal cancers such as those with vocal cord fixation and/or cricoid cartilage destruction, there is no apparent standardized organ-preserving surgery keeping the essential laryngeal functions, viz. the airway, deglutition and articulation, uncompromized. Recently, our surgical team saw a patient with T4a advanced laryngeal cancer with vocal cord fixation who aspired to maintain his laryngeal function...
April 14, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28414873/influence-of-pharyngeal-airway-respiration-pressure-on-class-ii-mandibular-retrusion-in-children-a-computational-fluid-dynamics-study-of-inspiration-and-expiration
#5
T Iwasaki, H Sato, H Suga, Y Takemoto, E Inada, I Saitoh, K Kakuno, R Kanomi, Y Yamasaki
OBJECTIVES: To examine the influence of negative pressure of the pharyngeal airway on mandibular retraction during inspiration in children with nasal obstruction using the computational fluid dynamics (CFD) method. SETTING AND SAMPLE POPULATION: Sixty-two children were divided into Classes I, II (mandibular retrusion) and III (mandibular protrusion) malocclusion groups. MATERIAL AND METHODS: Cone-beam computed tomography data were used to reconstruct three-dimensional shapes of the nasal and pharyngeal airways...
May 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28412180/computational-fluid-dynamics-study-of-the-pharyngeal-airway-space-before-and-after-mandibular-setback-surgery-in-patients-with-mandibular-prognathism
#6
Y Yajima, M Oshima, T Iwai, H Kitajima, S Omura, I Tohnai
The purpose of this study was to investigate the relationship between the pressure drop in the pharyngeal airway space (ΔPPAS) and the minimum cross-sectional area (minCSA) of the pharyngeal airway before and after mandibular setback surgery using computational fluid dynamics, in order to prevent iatrogenic obstructive sleep apnoea. Eleven patients with mandibular prognathism underwent bilateral sagittal split osteotomy for mandibular setback. Three-dimensional models of the upper airway were reconstructed from preoperative and postoperative computed tomography images, and simulations were performed using computational fluid dynamics...
April 12, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28409444/locally-invasive-thyroid-cancer-options-for-a-treatment
#7
Nicola Avenia, Jacopo Vannucci, Massimo Monacelli, Andrea Polistena, Francesco Puma
Local invasion to neighbor organs by thyroid cancer is an important prognosticator and requires different therapeutic approach. Which one is the possible best treatment option and results are evaluated in this study. A single-institution experience in thyroid cancer invading the airway is evaluated retrospectively (1990-2016). Facts regarding patients' demographics, disease history, comorbidities, condition at first evaluation and reason for referral are analyzed. Hospital records and treatment details are extracted from charts and Institutional folders...
April 13, 2017: Updates in Surgery
https://www.readbyqxmd.com/read/28408096/local-treatment-of-a-pharyngocutaneous-fistula-secondary-to-osteoradionecrosis
#8
Olga González-Antolín
Radionecrosis is a late, and difficult to treat,complication of radiotherapy performed on head and neck tumours, and it is difficult to treat. This process causes significant damage, not only in the skin, but also in muscular, nervous, vascular, and bone structures. This, in turn, leads to airway and digestive tract involvement, as well as a functional loss and a cosmetic defect that usually requires reconstructive surgery. Therefore, this process is associated with a significant loss in the quality of life of patients and involves a long hospital stay for treatment, as well as the necessary support measures...
April 10, 2017: Enfermería Clínica
https://www.readbyqxmd.com/read/28400960/longitudinal-assessment-of-bleomycin-induced-lung-fibrosis-by-micro-ct-correlates-with-histological-evaluation-in-mice
#9
Francesca Ruscitti, Francesca Ravanetti, Jeroen Essers, Yanto Ridwan, Sasha Belenkov, Wim Vos, Francisca Ferreira, Alex KleinJan, Paula van Heijningen, Cedric Van Holsbeke, Antonio Cacchioli, Gino Villetti, Franco Fabio Stellari
BACKGROUND: The intratracheal instillation of bleomycin in mice induces early damage to alveolar epithelial cells and development of inflammation followed by fibrotic tissue changes and represents the most widely used model of pulmonary fibrosis to investigate human IPF. Histopathology is the gold standard for assessing lung fibrosis in rodents, however it precludes repeated and longitudinal measurements of disease progression and does not provide information on spatial and temporal distribution of tissue damage...
2017: Multidisciplinary Respiratory Medicine
https://www.readbyqxmd.com/read/28397538/computer-aided-design-and-3-dimensional-printing-for-costal-cartilage-simulation-of-airway-graft-carving
#10
Jennifer F Ha, Robert J Morrison, Glenn E Green, David A Zopf
Autologous cartilage grafting during open airway reconstruction is a complex skill instrumental to the success of the operation. Most trainees lack adequate opportunities to develop proficiency in this skill. We hypothesized that 3-dimensional (3D) printing and computer-aided design can be used to create a high-fidelity simulator for developing skills carving costal cartilage grafts for airway reconstruction. The rapid manufacturing and low cost of the simulator allow deployment in locations lacking expert instructors or cadaveric dissection, such as medical missions and Third World countries...
April 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28396722/laparoscopic-retrosternal-gastric-pull-up-for-fistulized-mediastinal-mass
#11
Benedetto Mungo, Arianna Barbetta, Anne O Lidor, Miloslawa Stem, Daniela Molena
We describe the case of a patient successfully reconstructed with laparoscopic retrosternal gastric pull-up after esophagectomy for unresectable posterior mediastinal inflammatory myofibroblastic tumor, eroding into the esophagus and compressing the airways. A partial esophagectomy with esophagostomy was performed for treatment of esophageal pleural fistula and empyema, while the airways were managed with the placement of an endobronchial stent. Gastrointestinal reconstruction was performed using a laparoscopic approach to create a retrosternal tunnel for gastric conduit pull-up and cervical anastomosis...
March 27, 2017: World Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28388794/correcting-deviations-of-the-lower-third-of-the-nose
#12
Sami P Moubayed, Sam P Most
By convention, a "deviated nose" is one in which the lower third is asymmetric with regard to the midline. The lower third of the nose is composed of the lower cartilages, as well as the dorsal and caudal nasal septum. Not only does the deviated nose cause a cosmetic deformity that is often disconcerting for patients, but it may also be associated with functional problems. Airway obstruction may result from a narrowed internal nasal valve in the middle third or from a deviated caudal septum in the lower third...
April 2017: Facial Plastic Surgery: FPS
https://www.readbyqxmd.com/read/28387372/computational-fluid-dynamics-simulation-of-the-upper-airway-response-to-large-incisor-retraction-in-adult-class-i-bimaxillary-protrusion-patients
#13
Zhe Zheng, Hong Liu, Qi Xu, Wei Wu, Liling Du, Hong Chen, Yiwen Zhang, Dongxu Liu
The changes of the upper airway after large retraction of the incisors in adult class I bimaxillary protrusion patients were assessed mainly focused on the anatomic variation and ignored the functional changes. This study aimed to investigate the changes of the upper airway in adult class I bimaxillary protrusion patients after extraction treatment using the functional images based on computational fluid dynamics (CFD). CFD was implemented after 3D reconstruction based on the CBCT of 30 patients who have completed extraction treatment...
April 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28376262/the-effects-of-iterative-reconstruction-and-kernel-selection-on-quantitative-computed-tomography-measures-of-lung-density
#14
Alfonso Rodriguez, Frank N Ranallo, Philip F Judy, Sean B Fain
PURPOSE: To determine the effects of iterative reconstruction (IR) and high frequency kernels on quantitative computed tomography (qCT) density measures at reduced X-ray dose. MATERIALS AND METHODS: The COPDGene 2 Phantom (CTP 698, The Phantom Laboratory, Salem, NY) with four embedded lung mimicking foam densities (12lb, 20lb, and 4lb), as well as water, air, and acrylic reference inserts was imaged using a GE 64 slice CT750 HD scanner in helical mode with four current-time products ranging from 12-100 mAs...
April 4, 2017: Medical Physics
https://www.readbyqxmd.com/read/28369014/a-comparative-analysis-of-rhbmp-2-dbm-vs-icbg-for-secondary-alveolar-bone-grafts-in-patients-with-cleft-lip-and-palate-review-of-501-cases
#15
Jeffrey A Hammoudeh, Artur Fahradyan, Daniel D Gould, Fan Liang, Thomas Imahiyerobo, Leo Urbinelli, JoAnna T Nguyen, William Magee, Stephen Yen, Mark M Urata
BACKGROUND: Alveolar cleft reconstruction using iliac crest bone graft(ICBG) is considered standard of care for children with complete cleft lip and palate at the time of mixed dentition. Harvesting bone may result in donor site morbidity, additional operating time and length of hospitalization. Recombinant human bone morphogenetic protein(rhBMP)-2 with a demineralized bone matrix(DBM) was used as an alternative bone source for alveolar cleft reconstruction. We investigate the outcomes of rhBMP-2/DBM versus ICBG for alveolar cleft reconstruction by reviewing postoperative surgical complications and cleft closure...
March 31, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28357624/a-simple-method-to-reconstruct-the-molar-mass-signal-of-respiratory-gas-to-assess-small-airways-with-a-double-tracer-gas-single-breath-washout
#16
Johannes Port, Ziran Tao, Annika Junger, Christoph Joppek, Philipp Tempel, Kim Husemann, Florian Singer, Philipp Latzin, Sophie Yammine, Joachim H Nagel, Martin Kohlhäufl
For the assessment of small airway diseases, a noninvasive double-tracer gas single-breath washout (DTG-SBW) with sulfur hexafluoride (SF6) and helium (He) as tracer components has been proposed. It is assumed that small airway diseases may produce typical ventilation inhomogeneities which can be detected within one single tidal breath, when using two tracer components. Characteristic parameters calculated from a relative molar mass (MM) signal of the airflow during the washout expiration phase are analyzed...
March 29, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28325565/impact-of-the-method-and-success-of-pharyngeal-reconstruction-on-the-outcome-of-treating-laryngeal-and-hypopharyngeal-cancers-with-pharyngolaryngectomy-a-national-analysis
#17
S A R Nouraei, A Dias, H Kanona, D Vokes, P O'Flynn, P M Clarke, S E Middleton, A Darzi, P Aylin, N Jallali
BACKGROUND: Surgical treatment of cancers that arise from or invade the hypopharynx presents major reconstructive challenges. Reconstructive failure exposes the airway and neck vessels to digestive contents. METHODS: We performed a national N = near-all analysis of the administrative dataset to identify pharyngolaryngectomies in England between 2002 and 2012. Information about morbidity, pharyngeal closure method and post-operative complications was derived. RESULTS: There were 1589 predominantly male (78%) patients whose mean age at surgery was 62 years...
January 9, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28322040/design-and-fabrication-of-a-thin-walled-free-form-scaffold-on-the-basis-of-medical-image-data-and-a-3d-printed-template-its-potential-use-in-bile-duct-regeneration
#18
Suk-Hee Park, Bo-Kyeong Kang, Ji Eun Lee, Seung Woo Chun, Kiseok Jang, Youn Hwan Kim, Mi Ae Jeong, Yohan Kim, Kyojin Kang, Nak Kyu Lee, Dongho Choi, Han Joon Kim
Three-dimensional (3D) printing, combined with medical imaging technologies, such as computed tomography and magnetic resonance imaging (MRI), has shown a great potential in patient-specific tissue regeneration. Here, we successfully fabricated an ultrathin tubular free-form structure with a wall thickness of several tens of micrometers that is capable of providing sufficient mechanical flexibility. Such a thin geometry cannot easily be achieved by 3D printing alone; therefore, it was realized through a serial combination of processes, including the 3D printing of a sacrificial template, the dip coating of the biomaterial, and the removal of the inner template...
March 30, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28315041/positive-pressure-ventilation-in-a-patient-with-a-right-upper-lobar-bronchocutaneous-fistula-right-upper-bronchus-occlusion-using-the-cuff-of-a-left-sided-double-lumen-endobronchial-tube
#19
Chieko Omori, Hiroaki Toyama, Yusuke Takei, Yutaka Ejima, Masanori Yamauchi
In patients with a bronchocutaneous fistula, positive pressure ventilation leads to air leakage and potential hypoxemia. A male patient with a right upper bronchocutaneous fistula was scheduled for esophageal reconstruction. His preoperative chest computed tomography image revealed aeration in the right middle and lower lobe, a large bulla in the left upper lobe, and pleural effusion and pneumonia in the left lower lobe. Therefore, left one-lung ventilation was considered to result in hypoxemia. Before anesthesia induction, the bronchocutaneous fistula was covered with gauze and film to prevent air leakage...
March 17, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28294946/continuing-the-original-stanford-sleep-surgery-protocol-from-upper-airway-reconstruction-to-upper-airway-stimulation-our-first-successful-case
#20
Stanley Yung Liu, Robert Wayne Riley
In 1993, a surgical protocol for dynamic upper airway reconstruction in patients with obstructive sleep apnea (OSA) was published, and it became commonly known as the Stanford phase 1 and 2 sleep surgery protocol. It served as a platform on which research and clinical studies have continued to perfect the surgical care of patients with OSA. However, relapse is inevitable in a chronic condition such as OSA, and a subset of previously cured surgical patients return with complaints of excessive daytime sleepiness...
February 20, 2017: Journal of Oral and Maxillofacial Surgery
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