Read by QxMD icon Read

three-dimensional printing

Yan Yang, Zhongyin Zhou, Rong Liu, Lu Chen, Hongyu Xiang, Na Chen
Endoscopic retrograde cholangiopancreatography (ERCP) is an important treatment for inoperable hilar cholangiocarcinoma (HCC). The aim of the present study as to evaluate the clinical value of three-dimensional visualization (3DV) and 3D printing (3DP) technologies for ERCP in patients with HCC. The clinical data of 15 patients with HCC admitted for ERCP were analyzed retrospectively, including 9 males and 6 females. Thin-sliced data of computed tomography and magnetic resonance cholangiopancreatography (MRCP) were acquired and imported into Mimics Innovation Suite v17...
April 2018: Experimental and Therapeutic Medicine
Laura J Olivieri, David Zurakowski, Karthik Ramakrishnan, Lillian Su, Fahad A Alfares, Matthew R Irwin, Jenna Heichel, Axel Krieger, Dilip S Nath
BACKGROUND: Postoperative care delivered in the pediatric cardiac intensive care unit (CICU) relies on providers' understanding of patients' congenital heart defects (CHDs) and procedure performed. Novel, bedside use of virtual, three-dimensional (3D) heart models creates access to patients' CHD to improve understanding. This study evaluates the impact of patient-specific virtual 3D heart models on CICU provider attitudes and care delivery. METHODS: Virtual 3D heart models were created from standard preoperative cardiac imaging of ten patients with CHD undergoing repair and displayed on a bedside tablet in the CICU...
March 2018: World Journal for Pediatric & Congenital Heart Surgery
Zishen Wang, Qin'e Zhang, Shichuan Long, Yangxi Luo, Peikai Yu, Zhibing Tan, Jie Bai, Baihua Qu, Yang Yang, Jia Shi, Hua Zhou, Zong-Yuan Xiao, Wenjing Hong, Hua Bai
We apply direct ink writing for the three-dimensional (3D) printing of polyaniline/reduced graphene oxide (PANI/RGO) with PANI/GO gel as printable ink. The PANI/GO gel inks for 3D printing are prepared via self-assembly of PANI and GO in a blend solvent of N-methyl-2-pyrrolidinone and water, and offer both shaping capability, self-sustainability, and electrical conductivity after reduction of GO. Interdigitated electrodes are fabricated by using the PANI/GO ink in 3D printing, and a planar solid-state supercapacitor is constructed, which exhibits high performance with specific capacitance of 1329 mF cm-2...
March 15, 2018: ACS Applied Materials & Interfaces
Katherine M Holzem, Senthil Jayarajan, Mohamed A Zayed
No abstract text is available yet for this article.
March 2018: Journal of Vascular Surgery Cases and Innovative Techniques
Keigo Nakamura, Tetsuya Hisanaga, Koichi Fujimoto, Keiji Nakajima, Hirofumi Wada
The female sex organ of the liverwort ( Marchantia polymorpha ) has a characteristic parasol-like form highly suitable for collecting water droplets containing sperm for fertilization. Motivated by this observation and using three-dimensional printing techniques, we develop a parasol-like rigid object that can grab, transport and release water droplets of a maximum size of about 1 cm. By combining experiments and scaling theory, we quantify the object's fundamental wetting and fluid dynamical properties. We construct a stability phase diagram and suggest that it is largely insensitive to properties of liquids such as surface tension and viscosity...
March 2018: Journal of the Royal Society, Interface
Bruce F Sabath, David E Ost
PURPOSE OF REVIEW: The current review describes the latest evidence regarding the use of stents for malignant airway obstruction. RECENT FINDINGS: Therapeutic bronchoscopy, including stenting, can restore patency in up to 93% of patients with malignant central airway obstruction. The patients that benefit the most are those with worse baseline dyspnea, higher American Society of Anesthesiology score, poorer functional status, and central obstruction (rather than lobar)...
March 13, 2018: Current Opinion in Pulmonary Medicine
Vlad Ciobotaru, Nicolas Combes, Claire A Martin, Eloi Marijon, Eric Maupas, Augustin Bortone, Eric Bruguière, Jean-Benoit Thambo, Emmanuel Teiger, Pénélope Pujadas-Berthault, Julien Ternacle, Xavier Iriart
AIMS: To assess the predictive value of simulation based on 3D-printed models before left atrial appendage occlusion (LAAO) for peri-device leaks (PDL) and the impact on procedural outcomes compared to conventional imaging. METHODS AND RESULTS: 76 patients referred for LAAO with double disc device underwent construction of a 3D-printed LA model using flexible photopolymer resin. An implant simulation was performed retrospectively in Group 1 (55 patients), blinded to implanted device size, and prospectively in Group 2 (21 patients)...
March 13, 2018: EuroIntervention
Joseph Tracey, Danny Arora, Christopher E Gross, Selene G Parekh
BACKGROUND: Third generation total talar prostheses (TTPs) are viable options for talar avascular necrosis (AVN) in the absence of neighboring joint pathology. The use of modern three-dimensional (3D) printing allows the production of custom implants that exactly mimic the patient's anatomy. The aim of this study is to determine the accuracy of 3D printing in reproducing a synthetic talus and, in doing so, restoring more normal anatomical relationships. We hypothesize that this mode of replication will restore and maintain normal radiographic alignment of the ankle, subtalar, and forefoot joints in the setting of talar AVN...
March 1, 2018: Foot & Ankle Specialist
Ruike Zhao, Shaoting Lin, Hyunwoo Yuk, Xuanhe Zhao
Structures of thin films bonded on substrates have been used in technologies as diverse as flexible electronics, soft robotics, bio-inspired adhesives, thermal-barrier coatings, medical bandages, wearable devices and living devices. The current paradigm for maintaining adhesion of films on substrates is to make the films thinner, and more compliant and adhesive, but these requirements can compromise the function or fabrication of film-substrate structures. For example, there are limits on how thin, compliant and adhesive epidermal electronic devices can be fabricated and still function reliably...
March 14, 2018: Soft Matter
Keisuke Sugahara, Yoshiharu Katsumi, Masahide Koyachi, Yu Koyama, Satoru Matsunaga, Kento Odaka, Shinichi Abe, Masayuki Takano, Akira Katakura
Background: Along with the advances in technology of three-dimensional (3D) printer, it became a possible to make more precise patient-specific 3D model in the various fields including oral and maxillofacial surgery. When creating 3D models of the mandible and maxilla, it is easier to make a single unit with a fused temporomandibular joint, though this results in poor operability of the model. However, while models created with a separate mandible and maxilla have operability, it can be difficult to fully restore the position of the condylar after simulation...
December 2018: Maxillofacial Plastic and Reconstructive Surgery
Wataru Jomoto, Masao Tanooka, Hiroshi Doi, Keisuke Kikuchi, Chiemi Mitsuie, Yusuke Yamada, Toru Suzuki, Toshiko Yamano, Reiichi Ishikura, Noriko Kotoura, Shingo Yamamoto
We sought to develop a surgical navigation system using magnetic resonance angiography (MRA) and a three-dimensional (3D) printer for robot-assisted radical prostatectomy (RARP). Six patients with pathologically proven localized prostate cancer were prospectively enrolled in this study. Prostate magnetic resonance imaging (MRI), consisting of T2-weighted sampling perfection with application-optimized contrasts using different flip-angle evolutions (SPACE) and true fast imaging with steady-state precession (true FISP), reconstructed by volume rendering, was followed by dynamic contrast-enhanced MRA performed with a volumetric interpolated breath-hold examination (VIBE) during intravenous bolus injection of gadobutrol...
January 2, 2018: Curēus
Yang Ju, Heping Xie, Xi Zhao, Lingtao Mao, Zhangyu Ren, Jiangtao Zheng, Fu-Pen Chiang, Yongliang Wang, Feng Gao
Quantitative visualization and characterization of stress-field evolution during fracture rapid growth is critical for understanding the mechanisms that govern the deformation and failure of solids in various engineering applications. However, the direct capture and accurate characterization of a rapidly-changing stress field during crack propagation remains a challenge. We report an experimental method to quantitatively visualize and characterize rapid evolution of the stress-field during crack propagation in a transparent disc model containing a penetrating fusiform crack...
March 12, 2018: Scientific Reports
G Zhou, K P Wang, H W Liu, L Wang, X F Xiao, D D Dou, Y B Fan
Owing to low bearing capacity and efficiency, traditional filters or adsorbents for removal of contaminants like crystal violet (CV) dye required frequent replacement. Besides, the combination of three-dimensional (3D) printing and bionics could break the constraints of traditional configuration. In this study, a novel depth-type hybrid polylactic acid (PLA)@graphene oxide (GO)/chitosan (CS) sponge filter with bionic fish-mouth structure was prepared and fabricated, assisted by 3D printing and double freeze-drying technology, according to the theories of vertical cross-step filtration and swirling flow...
March 9, 2018: International Journal of Biological Macromolecules
Takayuki Shijo, Takashi Shirakawa, Masao Yoshitatsu, Keiji Iwata
Stent grafting for complex aortic anatomy remains a challenge. In particular, stent graft collapse (i.e. infolding) is possible when an excessive oversized device is needed. We describe a case of preoperative stent grafting simulation using a three-dimensional (3D) printed model for extensive aortic arch repair in a 69-year-old woman with multiple aneurysms combined with coarctation. The patient was scheduled to undergo staged hybrid repair. A stent graft larger than 28 mm in diameter was needed to deploy into a coarctation of 15 mm in diameter during the 2nd stage of the operation...
March 8, 2018: European Journal of Cardio-thoracic Surgery
Adekunle Elegbede, Silviu C Diaconu, Colton H L McNichols, Michelle Seu, Yvonne M Rasko, Michael P Grant, Arthur J Nam
Three-dimensional printing of patient-specific models is being used in various aspects of craniomaxillofacial reconstruction. Printing is typically outsourced to off-site vendors, with the main disadvantages being increased costs and time for production. Office-based 3-dimensional printing has been proposed as a means to reduce costs and delays, but remains largely underused because of the perception among surgeons that it is futuristic, highly technical, and prohibitively expensive. The goal of this report is to demonstrate the feasibility and ease of incorporating in-office 3-dimensional printing into the standard workflow for facial fracture repair...
March 8, 2018: Journal of Craniofacial Surgery
Yongzhou Wang, Ying Miao, Jieling Zhang, Jian Ping Wu, Thomas Brett Kirk, Jiake Xu, Dong Ma, Wei Xue
Hydrogels with shape memory behavior and internal structure have wide applications in fields ranging from tissue engineering and medical instruments to drug delivery; however, creating the hydrogels has proven to be extremely challenging. This study presents a three-dimensional (3D) printing technology to fabricate the shape memory hydrogels with internal structure (SMHs) by combining sodium alginate (alginate) and pluronic F127 diacrylate macromer (F127DA). SMHs were constituted by a dual network structure...
March 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
Maria Touri, Fathollah Moztarzadeh, Noor Azuan Abu Osman, Mohammad Mehdi Dehghan, Masoud Mozafari
Tissue engineering scaffolds with oxygen generating elements have shown to be able to increase the level of oxygen and cell survivability in specific conditions. In this study, biphasic calcium phosphate (BCP) scaffolds with the composition of 60% hydroxyapatite (HA) and 40% beta-tricalcium phosphate (β-TCP), which have shown a great potential for bone tissue engineering applications, were fabricated by a direct-write assembly (robocasting) technique. Then, the three-dimensional (3D)-printed scaffolds were coated with different ratios of an oxygen releasing agent, calcium peroxide (CPO), which encapsulated within a polycaprolactone (PCL) matrix through dip-coating, and used for in situ production of oxygen in the implanted sites...
March 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
Lobat Tayebi, Morteza Rasoulianboroujeni, Keyvan Moharamzadeh, Thafar K D Almela, Zhanfeng Cui, Hua Ye
Three-dimensional (3D) printing is currently being intensely studied for a diverse set of applications, including the development of bioengineered tissues, as well as the production of functional biomedical materials and devices for dental and orthopedic applications. The aim of this study was to develop and characterize a 3D-printed hybrid construct that can be potentially suitable for guided tissue regeneration (GTR). For this purpose, the rheology analyses have been performed on different bioinks and a specific solution comprising 8% gelatin, 2% elastin and 0...
March 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
Huijun Li, Yu Jun Tan, Sijun Liu, Lin Li
A novel strategy to improve the adhesion between printed layers of 3D printed constructs is developed by exploiting the interaction between two oppositely charged hydrogels. Three anionic hydrogels (alginate, xanthan, kappa-carrageenan (Kca)) and three cationic hydrogels (chitosan, gelatin, gelatin methacrylate (GelMA)) are chosen in order to find the optimal combination of two oppositely charged hydrogels for the best 3D printability with strong interface bonding. Rheological properties and printability of the hydrogels, as well as structural integrity of printed constructs in cell culture medium, are studied as functions of polymer concentration and combination of hydrogels...
March 8, 2018: ACS Applied Materials & Interfaces
Maayke M P Kuijten, Jelmer S Remmers, Daphne L Mourits, Annette C Moll, Dyonne T Hartong
No abstract text is available yet for this article.
March 2018: Ophthalmic Plastic and Reconstructive Surgery
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"