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https://www.readbyqxmd.com/read/28337049/use-of-3d-printed-bone-plate-in-novel-technique-to-surgically-correct-hallux-valgus-deformities
#1
Kathryn E Smith, Kenneth M Dupont, David L Safranski, Jeremy Blair, Dawn Buratti, Vladimir Zeetser, Ryan Callahan, Jason Lin, Ken Gall
Three-dimensional (3-D) printing offers many potential advantages in designing and manufacturing plating systems for foot and ankle procedures that involve small, geometrically complex bony anatomy. Here, we describe the design and clinical use of a Ti-6Al-4V ELI bone plate (FastForward™ Bone Tether Plate, MedShape, Inc., Atlanta, GA) manufactured through 3-D printing processes. The plate protects the second metatarsal when tethering suture tape between the first and second metatarsals and is a part of a new procedure that corrects hallux valgus (bunion) deformities without relying on doing an osteotomy or fusion procedure...
September 2016: Techniques in Orthopaedics: TIO
https://www.readbyqxmd.com/read/28328198/all-printable-zno-quantum-dots-graphene-van-der-waals-heterostructures-for-ultrasensitive-detection-of-ultraviolet-light
#2
Maogang Gong, Qingfeng Liu, Brent Cook, Bhupal Kattel, Ti Wang, Wai-Lun Chan, Dan Ewing, Matthew Casper, Alex Stramel, Judy Z Wu
In ZnO quantum dot/graphene heterojunction photodetectors, fabricated by printing quantum dots (QDs) directly on the graphene field-effect transistor (GFET) channel, the combination of the strong quantum confinement in ZnO QDs and the high charge mobility in graphene allows extraordinary quantum efficiency (or photoconductive gain) in visible-blind ultraviolet (UV) detection. Key to the high performance is a clean van der Waals interface to facilitate an efficient charge transfer from ZnO QDs to graphene upon UV illumination...
March 24, 2017: ACS Nano
https://www.readbyqxmd.com/read/28323466/sexual-assault-victimization-and-mental-health-treatment-suicide-attempts-and-career-outcomes-among-women-in-the-us-army
#3
Anthony J Rosellini, Amy E Street, Robert J Ursano, Wai Tat Chiu, Steven G Heeringa, John Monahan, James A Naifeh, Maria V Petukhova, Ben Y Reis, Nancy A Sampson, Paul D Bliese, Murray B Stein, Alan M Zaslavsky, Ronald C Kessler
OBJECTIVES: To examine associations of administratively recorded sexual assault victimization during military service with subsequent mental health and negative career outcomes among US Army women controlling for nonrandom victimization exposure. METHODS: We used data from the Army Study to Assess Risk and Resilience in Servicemembers to apply propensity score methods to match all 4238 female Regular Army soldiers with administratively recorded sexual assault victimization during 2004 to 2009 to 5 controls per case with similar composite victimization risk...
March 21, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28300229/impedance-spectroscopy-for-monosaccharides-detection-using-responsive-hydrogel-modified-paper-based-electrodes
#4
C M Daikuzono, C Delaney, H Tesfay, L Florea, O N Oliveira, A Morrin, D Diamond
Herein we present a novel sensor for the detection of monosaccharides (e.g. glucose, fructose) in solution, using electrical impedance spectroscopy. The sensor is based on carbon interdigitated electrodes, printed on paper using screen printing. The surface of the electrodes was modified with a thin layer of hydrogel containing acrylamide copolymerised with 20 mol% 3-(Acrylamido)phenylboronic acid (PBA). It was observed that the hydrogel layers containing 20 mol% PBA swell considerably in the presence of glucose and fructose...
March 16, 2017: Analyst
https://www.readbyqxmd.com/read/28275838/economic-evaluation-of-a-population-based-osteoporosis-intervention-for-outpatients-with-non-traumatic-non-hip-fractures-the-catch-a-break-1i-type-c-fls
#5
S R Majumdar, D A Lier, D A Hanley, A G Juby, L A Beaupre
Fracture liaison services (FLS) are advocated to improve osteoporosis treatment after fragility fracture, but there are few economic analyses of different models. A population-based 1i [=type C] FLS for non-hip fractures was implemented and it costs $44 per patient and it was very cost-effective ($9200 per QALY gained). Small operational changes would convert it from cost-effective to cost-saving. INTRODUCTION: After fragility fracture, <20% of patients receive osteoporosis treatment...
March 9, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28270051/towards-an-understanding-of-marine-fouling-effects-on-the-vortex-induced-vibrations-of-circular-cylinders-partial-coverage-issue
#6
M Zeinoddini, A Bakhtiari, F Schoefs, A P Zandi
The results of in-water vortex-induced vibration (VIV) experiments on circular cylinders artificially covered with barnacles are reported. The paper focusses on the effects of the partial coverage and the shape of the fouling elements. An artificial barnacle typical of marine fouling was synthesised using 3-D printing. Coverage ratios of 80, 50 and 30% were examined and the results compared with those from a smooth cylinder. The Reynolds number ranged from 5.8 × 10(3) to 6.6 × 10(4). The experimental results show that the fouling reduced the peak VIV amplitude, narrowed the synchronisation region and lowered the hydrodynamic force coefficients such as the coefficients of lift force RMS, the mean drag force and the fluctuating drag force RMS...
March 2017: Biofouling
https://www.readbyqxmd.com/read/28270050/water-quality-and-daily-temperature-cycle-affect-biofilm-formation-in-drip-irrigation-devices-revealed-by-optical-coherence-tomography
#7
Jueying Qian, Harald Horn, Jorge Tarchitzky, Yona Chen, Sagi Katz, Michael Wagner
Drip irrigation is a water-saving technology. To date, little is known about how biofilm forms in drippers of irrigation systems. In this study, the internal dripper geometry was recreated in 3-D printed microfluidic devices (MFDs). To mimic the temperature conditions in (semi-) arid areas, experiments were conducted in a temperature controlled box between 20 and 50°C. MFDs were either fed with two different treated wastewater (TWW) or synthetic wastewater. Biofilm formation was monitored non-invasively and in situ by optical coherence tomography (OCT)...
March 2017: Biofouling
https://www.readbyqxmd.com/read/28269689/designing-and-testing-a-wearable-wireless-fnirs-patch
#8
Mohammadreza Abtahi, Gozde Cay, Manob Jyoti Saikia, Kunal Mankodiya
Optical brain monitoring using near infrared (NIR) light has got a lot of attention in order to study the complexity of the brain due to several advantages as oppose to other methods such as EEG, fMRI and PET. There are a few commercially available functional NIR spectroscopy (fNIRS) brain monitoring systems, but they are still non-wearable and pose difficulties in scanning the brain while the participants are in motion. In this work, we present our endeavors to design and test a low-cost, wireless fNIRS patch using NIR light sources at wavelengths of 770 and 830nm, photodetectors and a microcontroller to trigger the light sources, read photodetector's output and transfer data wirelessly (via Bluetooth) to a smart-phone...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269245/a-low-cost-3-d-printed-stethoscope-connected-to-a-smartphone
#9
Carlos Aguilera-Astudillo, Marx Chavez-Campos, Alan Gonzalez-Suarez, Jose L Garcia-Cordero
We demonstrate the fabrication of a digital stethoscope using a 3D printer and commercial off-the-shelf electronics. A chestpiece consists of an electret microphone embedded into the drum of a 3D printed chestpiece. An electronic dongle amplifies the signal from the microphone and reduces any external noise. It also adjusts the signal to the voltages accepted by the smartphones headset jack. A graphical user interface programmed in Android displays the signals processed by the dongle. The application also saves the processed signal and sends it to a physician...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268399/an-effective-3-fingered-augmenting-exoskeleton-for-the-human-hand
#10
C J Gearhart, B Varone, M H Stella, B F BuSha
Every year, thousands of Americans suffer from pathological and traumatic events that result in loss of dexterity and strength of the hand. Although many supportive devices have been designed to restore functional hand movement, most are very complex and expensive. The goal of this project was to design and implement a cost-effective, electrically powered exoskeleton for the human hand that could improve grasping strength. A 3-D printed thermoplastic exoskeleton that allowed independent and enhanced movement of the index, middle and ring fingers was constructed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28264483/evolutionary%C3%A2-developments%C3%A2-in%C3%A2-interpreting%C3%A2-the%C3%A2-gluten-induced%C3%A2-mucosal%C3%A2-celiac%C3%A2-lesion-%C3%A2-an%C3%A2-archimedian%C3%A2-heuristic
#11
REVIEW
Michael N Marsh, Calvin J Heal
The evolving history of the small intestinal biopsy and its interpretation-and misinterpretations-are described in this paper. Certain interpretative errors in the technical approaches to histological assessment are highlighted-even though we may never be rid of them. For example, mucosal "flattening" does not reduce individual villi to their cores, as still seems to be widely believed. Neither is the mucosa undergoing an atrophic process-since it can recover structurally. Rather, the intestinal mucosa manifests a vast hypertrophic response resulting in the formation of large plateaus formed from partially reduced villi and their amalgamation with the now increased height and width of the inter-villous ridges: this is associated with considerable increases in crypt volumes...
February 28, 2017: Nutrients
https://www.readbyqxmd.com/read/28249831/negotiating-tensions-between-theory-and-design-in-the-development-of-mailings-for-people-recovering-from-acute-coronary-syndrome
#12
Holly O Witteman, Justin Presseau, Emily Nicholas Angl, Iffat Jokhio, J D Schwalm, Jeremy M Grimshaw, Beth Bosiak, Madhu K Natarajan, Noah M Ivers
BACKGROUND: Taking all recommended secondary prevention cardiac medications and fully participating in a formal cardiac rehabilitation program significantly reduces mortality and morbidity in the year following a heart attack. However, many people who have had a heart attack stop taking some or all of their recommended medications prematurely and many do not complete a formal cardiac rehabilitation program. OBJECTIVE: The objective of our study was to develop a user-centered, theory-based, scalable intervention of printed educational materials to encourage and support people who have had a heart attack to use recommended secondary prevention cardiac treatments...
March 1, 2017: JMIR Human Factors
https://www.readbyqxmd.com/read/28241717/-application-of-three-dimensional-printing-personalized-acetabular-wing-plate-in-treatment-of-complex-acetabular-fractures-via-lateral-rectus-approach
#13
J G Mai, C Gu, X Z Lin, T Li, W Q Huang, H Wang, X Y Tan, H Lin, Y M Wang, Y Q Yang, D D Jin, S C Fan
Objective: To investigate reduction and fixation of complex acetabular fractures using three-dimensional (3D) printing technique and personalized acetabular wing-plate via lateral-rectus approach. Methods: From March to July 2016, 8 patients with complex acetabular fractures were surgically managed through 3D printing personalized acetabular wing-plate via lateral-rectus approach at Department of Orthopedics, the Third Affiliated Hospital of Southern Medical University. There were 4 male patients and 4 female patients, with an average age of 57 years (ranging from 31 to 76 years)...
March 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/28239188/a-framework-for-geometry-acquisition-3-d-printing-simulation-and-measurement-of-head-related-transfer-functions-with-a-focus-on-hearing-assistive-devices
#14
Stine Harder, Rasmus R Paulsen, Martin Larsen, Søren Laugesen, Michael Mihocic, Piotr Majdak
Individual head-related transfer functions (HRTFs) are essential in applications like fitting hearing-assistive devices (HADs) for providing accurate sound localization performance. Individual HRTFs are usually obtained through intricate acoustic measurements. This paper investigates the use of a three-dimensional (3D) head model for acquisition of individual HRTFs. Two aspects were investigated; whether a 3D-printed model can replace measurements on a human listener and whether numerical simulations can replace acoustic measurements...
June 2016: Computer Aided Design
https://www.readbyqxmd.com/read/28227950/designing-and-testing-a-wearable-wireless-fnirs-patch
#15
Mohammadreza Abtahi, Gozde Cay, Manob Jyoti Saikia, Kunal Mankodiya, Mohammadreza Abtahi, Gozde Cay, Manob Jyoti Saikia, Kunal Mankodiya, Manob Jyoti Saikia, Kunal Mankodiya, Gozde Cay, Mohammadreza Abtahi
Optical brain monitoring using near infrared (NIR) light has got a lot of attention in order to study the complexity of the brain due to several advantages as oppose to other methods such as EEG, fMRI and PET. There are a few commercially available functional NIR spectroscopy (fNIRS) brain monitoring systems, but they are still non-wearable and pose difficulties in scanning the brain while the participants are in motion. In this work, we present our endeavors to design and test a low-cost, wireless fNIRS patch using NIR light sources at wavelengths of 770 and 830nm, photodetectors and a microcontroller to trigger the light sources, read photodetector's output and transfer data wirelessly (via Bluetooth) to a smart-phone...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227479/a-low-cost-3-d-printed-stethoscope-connected-to-a-smartphone
#16
Carlos Aguilera-Astudillo, Marx Chavez-Campos, Alan Gonzalez-Suarez, Jose L Garcia-Cordero, Carlos Aguilera-Astudillo, Marx Chavez-Campos, Alan Gonzalez-Suarez, Jose L Garcia-Cordero, Jose L Garcia-Cordero, Alan Gonzalez-Suarez, Marx Chavez-Campos
We demonstrate the fabrication of a digital stethoscope using a 3D printer and commercial off-the-shelf electronics. A chestpiece consists of an electret microphone embedded into the drum of a 3D printed chestpiece. An electronic dongle amplifies the signal from the microphone and reduces any external noise. It also adjusts the signal to the voltages accepted by the smartphones headset jack. A graphical user interface programmed in Android displays the signals processed by the dongle. The application also saves the processed signal and sends it to a physician...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226567/an-effective-3-fingered-augmenting-exoskeleton-for-the-human-hand
#17
C J Gearhart, B Varone, M H Stella, B F BuSha, C J Gearhart, B Varone, M H Stella, B F BuSha, M H Stella, B F BuSha, B Varone, C J Gearhart
Every year, thousands of Americans suffer from pathological and traumatic events that result in loss of dexterity and strength of the hand. Although many supportive devices have been designed to restore functional hand movement, most are very complex and expensive. The goal of this project was to design and implement a cost-effective, electrically powered exoskeleton for the human hand that could improve grasping strength. A 3-D printed thermoplastic exoskeleton that allowed independent and enhanced movement of the index, middle and ring fingers was constructed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28215503/biomaterial-shell-bending-with-3d-printed-templates-in-vertical-and-alveolar-ridge-augmentation-a-technical-note
#18
Florian G Draenert, Florian Gebhart, Gergo Mitov, Andreas Neff
OBJECTIVES: Alveolar ridge and vertical augmentations are challenging procedures in dental implantology. Even material blocks with an interconnecting porous system are never completely resorbed. Shell techniques combined with autologous bone chips are therefore the gold standard. Using biopolymers for these techniques is well documented. We applied three-dimensional (3-D) techniques to create an individualized bending model for the adjustment of a plane biopolymer membrane made of polylactide...
January 4, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28202206/retrospective-chart-analysis-of-concussion-discharge-instructions-in-the-emergency-department
#19
Allison D Lane, Matthew R Berkman, David Verbunker, Taylor Shekell, Michael Bouska, Lauren Barnett, Allie Keogh, Tomas Nuno, Uwe Stolz, Anna L Waterbrook
BACKGROUND: Recognition and diagnosis of concussion is increasing, but current research shows these patients are discharged from the emergency department (ED) with a wide variability of recommendations and instructions. OBJECTIVE: To assess the adequacy of documentation of discharge instructions given to patients discharged from the ED with concussions. METHODS: This was a quality-improvement study conducted at a University-based Level I trauma center...
February 12, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28193147/print-on-demand
#20
Sarah Webb
Advances in 3-D printing and biomaterials are helping to shape the field of regenerative medicine. Sarah Webb examines the latest developments.
February 1, 2017: BioTechniques
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