1,716,537 results match your criteria device miniaturization

Does the power of the laser devices matter for a successful HoLEP procedure? A prospective comparative study.

Int J Clin Pract 2021 Jun 15:e14531. Epub 2021 Jun 15.

Department of Urology, Biruni University School of Medicine, Istanbul, Turkey.

Background: The objectives of this prospective study were to evaluate the efficiency, safety and applicability of medium power (MP) holmium laser devices in the endoscopic enucleation of the enlarged prostate (HoLEP) compared to high power (HP) laser devices.

Methods: From October 2019 to July 2020, a total of 120 consecutive patients planned for HoLEP were divided randomly into two groups formed in terms of the power of the device used. While patients in Group 1 were treated with a MP device (50W) at 39. Read More

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A Comparison of Physical Activity Levels, Sleep Disrupting Behavior, and Stress/Affective Distress as Predictors of Sleep as Indexed by Actigraphy.

J Phys Act Health 2021 Jun 13:1-12. Epub 2021 Jun 13.

Background: Several behaviors have been reported to interfere with sleep in otherwise healthy adults, including low physical activity (PA) levels. However, few studies have compared low PA with the other behavioral risk factors of objective sleep impairment, despite the behavior tending to cooccur in highly stressed and affectively distressed individuals. Thus, the authors compared objective and subjective measures of PA and other potential sleep disrupting behaviors as predictors of objective sleep (sleep onset latency, actual sleep time, total sleep duration, awake time, and sleep efficacy) at baseline (T1) and 3 months later (T2). Read More

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Effects of dynamic adsorption on bubble formation and coalescence in partitioned-EDGE devices.

J Colloid Interface Sci 2021 Jun 4;602:316-324. Epub 2021 Jun 4.

Wageningen University, Food Process Engineering Group, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands. Electronic address:

Hypothesis: Dynamic adsorption effects can play a crucial role in bubble formation and stabilization. We hypothesize that microfluidic tools provide direct insights to these effects, and that the final bubble size depends on the intersection of time scales for bubble formation versus adsorption of proteins.

Experiments: We use a microfluidic device to study Laplace pressure-driven formation of bubbles that are stabilized by whey proteins. Read More

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Facilitating the use of personal safety alerting device with older adults: The views, experiences and roles of relatives and health care professionals.

Geriatr Nurs 2021 Jun 11;42(4):935-942. Epub 2021 Jun 11.

School CAPHRI, Department of Health Services Research, Maastricht University, Maastricht, The Netherlands; School CAPHRI, Department of Family Medicine, Maastricht University, Maastricht, The Netherlands. Electronic address:

To explore relatives', community nurses' and general practitioners' perspectives and experiences in promoting Personal Safety Alerting Device (PSAD) use among community-dwelling older adults, we applied a qualitative study design. Altogether 15 focus groups and 11 semi-structured interviews were conducted. Data-analysis followed the Qualitative Analysis Guide of Leuven. Read More

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Transcatheter aortic valve replacement in bicuspid valves: The synergistic effects of eccentric and incomplete stent deployment.

J Mech Behav Biomed Mater 2021 Jun 7;121:104621. Epub 2021 Jun 7.

Department of Mechanical and Materials Engineering, University of Denver, Denver, CO, USA. Electronic address:

Bicuspid aortic valve is a congenital cardiac anomaly and common etiology of aortic stenosis. Given the positive outcomes of transcatheter aortic valve replacement (TAVR) in low-risk patients, TAVR will become more prevalent in the future in the treatment of severe bicuspid valve stenosis. However, asymmetrical bicuspid valve anatomy and calcification can prevent the circular and complete expansion of transcatheter aortic valves (TAVs). Read More

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Early detection of cognitive decline in mild cognitive impairment and Alzheimer's disease with a novel eye tracking test.

J Neurol Sci 2021 Jun 3;427:117529. Epub 2021 Jun 3.

Department of Neurology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan. Electronic address:

Due to an increasing number of dementia patients, the development of a rapid and sensitive method for cognitive assessment is awaited. Here, we examined the usefulness of a novel and short (3 min) eye tracking device to evaluate the cognitive function of normal control (NC, n = 52), mild cognitive impairment (MCI, n = 52), and Alzheimer's disease (AD, n = 70) subjects. Eye tracking total score declined significantly in MCI (**p < 0. Read More

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Characteristics of driving self-assessments and factors related to inaccurate self-assessment in Japanese older adults.

Accid Anal Prev 2021 Jun 12;159:106235. Epub 2021 Jun 12.

National Research Institute of Police Science, 6-3-1, Kashiwanoha, Kashiwa-shi, Chiba 277-0882, Japan.

Older adults are considered to decide their driving behaviors based their own assessment of their driving performance, and thus it is important that these self-assessments be accurate. Therefore, this study aimed to clarify how older drivers assess their driving performance and examine factors related to the level of inaccuracy in their self-assessments. Japanese drivers aged 70 years or older (N = 181) were asked to assess their own driving performance by questionnaire and then to drive on a public road while wearing an electronic device that measured their actual driving behaviors. Read More

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Internet gaming disorder and comorbidities among campus-dwelling U.S. university students.

Psychiatry Res 2021 Jun 6;302:114043. Epub 2021 Jun 6.

Department of Psychiatry and Behavioral Sciences, Stanford University, CA, United States.

This study investigates the prevalence and associations of DSM-5 Internet Gaming Disorder (IGD) with sleep impairment, daytime functioning, psychiatric disorders, and health status among young adults living in student houses on the campus of an American university. A random sample of students living on the campus underwent phone interviews during the 2007 & 2015 academic years. The sample included 1,871 undergraduate and 1,113 graduate students (2,984 in total). Read More

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Treatment Outcomes After Single-Device Flow Diversion for Large or Giant Aneurysms.

World Neurosurg 2021 Jun 12. Epub 2021 Jun 12.

Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea. Electronic address:

Objective: Here, we aimed to evaluate the efficacy and safety of single-device flow diversion in patients with aneurysms measuring ≥15 mm in diameter.

Methods: For this retrospective study, we extracted medical record data for patients with unruptured intracranial aneurysms, who underwent flow diversion, at the authors' institution between July 2014 and August 2019. The primary effectiveness outcome was defined as angiographic occlusion of the target aneurysm within 18 months without major (>50%) parent artery stenosis, major adverse events, or additional treatment. Read More

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Quantitative Assessment of Age-dependent changes in Porphyrins from Fluorescence Images of Ultraviolet Photography by Image Processing.

Photodiagnosis Photodyn Ther 2021 Jun 12:102388. Epub 2021 Jun 12.

Graduate School of Science and Technology, Keio University, Yokohama, Japan. Electronic address:

Background: Skin is the first line of defense against harmful external environmental factors. Lots of skin flora living on the skin surface deal with skin health care and skin disease treatment and prevention, such as bacteria, which form the unique and complex skin micro-ecological system. Propionibacterium acnes (P. Read More

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Leveraging insights from behavioral economics to improve mobility for adults with stroke: Design and rationale of the BE Mobile clinical trial.

Contemp Clin Trials 2021 Jun 12;107:106483. Epub 2021 Jun 12.

Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.

Physical inactivity post-stroke can negatively impact long-term health outcomes and contribute to cardiovascular deconditioning, muscle loss, and increased risk for recurrent stroke. The limited number of interventions designed to improve daily physical activity post-stroke have lacked precision in step goals, are resource intensive, and difficult to scale. The purpose of the Leveraging Insights from Behavioral Economics to Improve Mobility for Adults with Stroke (BE Mobile) trial is to examine the preliminary effectiveness of a novel gamification with social incentives intervention for improving physical activity post-stroke. Read More

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Endoscopic Septotomy Of Zenker's Diverticulum With Stag-Beetle Knife: A Descriptive Observational Study And Literature Review.

Gastroenterol Hepatol 2021 Jun 12. Epub 2021 Jun 12.

UGC Aparato Digestivo Hospital Universitario Virgen de la Victoria, Málaga, Spain.

Introduction: Zenker's diverticulum (ZD) is a protrusion of the hypopharyngeal mucosa with a prevalence of 2 / 100,000 inhabitants. The symptoms of the patients determine the need for treatment, which can be surgical or endoscopic. The latter, known as endoscopic septotomy or diverticulotomy (ED), this involves dissecting the diverticular septum, which can be performed with different dissection devices. Read More

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Maternal gestational mercury exposure in relation to cord blood T cell alterations and placental gene expression signatures.

Environ Res 2021 Jun 12:111385. Epub 2021 Jun 12.

Department of Epidemiology, Geisel School of Medicine and the Children's Environmental Health and Disease Prevention Research Center at Dartmouth; Hanover, NH, USA.

The immunotoxic impacts of mercury during early life is poorly understood. We investigated the associations between gestational mercury exposure and frequency of cord blood T cells as well as placental gene expression. Frequency of natural Treg cells was positively associated with prenatal and postpartum mercury toenail concentrations. Read More

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Implant failure following pedicle based dynamic stabilization of the lumbar spine.

Acta Orthop Belg 2021 Mar;87(1):191-196

Pedicle-based dynamic stabilization (PBDS) devices such as Dynesys are promoted as an alternative and less invasive option for rigid stabilization of one and even more levels of the lumbar spine. Promising features of the Dynesys system, as well as shortcomings, became obvious in several clinical studies. Since 2012, we started using a new PBDS device as an alternative for the Dynesys, to avoid the screw loosening and the kyphosing effect. Read More

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Intra operative assessment of the coronal balance in spinal deformity surgery : a technical note and retrospective study.

Acta Orthop Belg 2021 Mar;87(1):175-179

Obtaining a spine that is well balanced after fusion for scoliotic deformity is primordial for the patients' quality of life. A simple T-shaped instrument combined with standard intraoperative fluoroscopy can be of great help to evaluate the coronal alignment quickly. The aim of this study was to evaluate if a T-shaped device could predict the postoperative coronal balance. Read More

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Cement augmentation for trochanteric femur fractures: A meta-analysis of randomized clinical trials and observational studies.

PLoS One 2021 15;16(6):e0251894. Epub 2021 Jun 15.

Department of Orthopaedic and Trauma Surgery, Lucerne Cantonal Hospital, Lucerne, Switzerland.

Introduction: To date, it is unclear what the clinical benefit of cement augmentation in fixation for trochanteric fractures is. The aim of this meta-analysis is to compare cement augmentation to no augmentation in fixation of trochanteric femur fractures in the elderly patients (>65 years) following low energy trauma.

Methods: PubMed/Medline/Embase/CENTRAL/CINAHL were searched for both randomized clinical trials (RCT) and observational studies comparing both treatments. Read More

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The associations between smart device use and psychological distress among secondary and high school students in Kuwait.

PLoS One 2021 15;16(6):e0251479. Epub 2021 Jun 15.

Department of Physical Education, College of Basic Education, The Public Authority for Applied Education and Training, Kuwait.

Background: Smart devices (SDs) are widely used among adolescents. Numerous studies have recommended further research on this topic to find out the prevalence of SD overuse among school students and to what extent this is associated with psychological distress. The present study aimed to investigate the pattern of SD use among secondary and high school students in the state of Kuwait, as well as the possible associations with psychological problems, weight, physical activity, and school performance. Read More

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Synthesis of vector nonuniformly correlated light beams by a single digital mirror device.

Opt Lett 2021 Jun;46(12):2996-2999

We present a stable and flexible way to generate the vector nonuniformly correlated (NUC) beams with a compact optical system that involves only a single digital mirror device and a common-path interferometer. The system provides near real-time generation and accurate control of the phase difference between the orthogonal field components of the vector NUC beams. We discuss the methodology based on the vectorial pseudo-mode decomposition of the cross-spectral density matrix of the beam. Read More

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Photon-recycling effect in perovskites for photovoltaic applications: a Monte Carlo study.

Opt Lett 2021 Jun;46(12):2988-2991

Photon recycling has been shown to play an important role in the optoelectronic properties and device performance of perovskite solar cells recently. However, there lacks an analytical method to accurately predict the dynamics of charge carriers and photons and the device performance with photon recycling due to the complexity of multiple electron-photon conversion processes involved in photon recycling. We propose a model based on the Monte Carlo simulation method that combines charge carrier diffusion and photon radiation transport to analyze the effects of photon recycling on electron-photon dynamics and device performance of perovskite solar cells. Read More

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Rayleigh scatterer-induced steady exceptional points of stable-island modes in a deformed optical microdisk.

Opt Lett 2021 Jun;46(12):2980-2983

A formation of second-order non-Hermitian degeneracies, called exceptional points (EPs), in a chaotic oval-shaped dielectric microdisk is studied. Different symmetric optical modes localized on a stable period-3 orbit coalesce to form chiral EPs. Unlike a circular microdisk perturbed by two scatterers (CTS), our proposed system requires only one scatterer to build chiral EPs. Read More

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Folded thin-film lithium niobate modulator based on a poled Mach-Zehnder interferometer structure.

Opt Lett 2021 Jun;46(12):2940-2943

The thin-film lithium niobate structure has been used recently to construct compact and high-performance electro-optical modulators. Due to the moderate electro-optical coefficient of the lithium niobate material, the device length of such a modulator is still long, a few centimeters usually. Here, a folded Mach-Zehnder interferometer based modulator on -cut thin-film lithium niobate is demonstrated. Read More

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Experimental investigation of 16.6 Gbps SDM-WDM visible light communication based on a neural network receiver and tricolor mini-LEDs.

Opt Lett 2021 Jun;46(12):2888-2891

Visible light communication (VLC) based on a light-emitting diode (LED) suffers from a limited bandwidth of commercial LED, device nonlinearity, channel distortion, and transmitted power caused by a complex free-space channel, power amplifier, and illuminant devices resulting in a limited data rate. In this Letter, to provide an alternative high-speed solution, we first designed and fabricated three 175 µm tricolor mini-LEDs with various wavelengths. They are used to set up a spatial division multiplexing-wavelength division multiplexing VLC system over a 2 m link. Read More

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Clinical Characteristics and Predictors of In-Hospital Mortality in Patients With Cardiogenic Shock: Results From the RESCUE Registry.

Circ Heart Fail 2021 Jun 15;14(6):e008141. Epub 2021 Jun 15.

Division of Cardiology, Department of Medicine, Heart Vascular Stroke Institute, Samsung Medical Center (J.H.Y., K.H.C., T.K.P., J.M.L., Y.B.S., J.-Y.H., S.-H.C., H.-C.G.), Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.

Background: In the current era of mechanical circulatory support, limited data are available on prognosis of cardiogenic shock (CS) caused by various diseases. We investigated the characteristics and predictors of in-hospital mortality in Korean patients with CS.

Methods: The RESCUE study (Retrospective and Prospective Observational Study to Investigate Clinical Outcomes and Efficacy of Left Ventricular Assist Device for Korean Patients With CS) is a multicenter, retrospective, and prospective registry of patients that presented with CS. Read More

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Remote Hemodynamic Monitoring Equally Reduces Heart Failure Hospitalizations in Women and Men in Clinical Practice: A Sex-Specific Analysis of the CardioMEMS Post-Approval Study.

Circ Heart Fail 2021 Jun 15;14(6):e007892. Epub 2021 Jun 15.

Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA (M.M.G.).

Background: Response to pharmacological and device-based therapy for heart failure (HF) may vary by sex. We examined sex differences in response to ambulatory hemodynamic monitoring in clinical practice using the CardioMEMS PAS (Post-Approval Study).

Methods: The CardioMEMS PAS was a prospective, single-arm, multicenter, open-label study of 1200 adults with New York Heart Association class III HF and at least 1 HF hospitalization (HFH) within 12 months who underwent pulmonary artery pressure sensor implantation between 2014 and 2017. Read More

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Levels of Trimethylamine N-Oxide Remain Elevated Long Term After Left Ventricular Assist Device and Heart Transplantation and Are Independent From Measures of Inflammation and Gut Dysbiosis.

Circ Heart Fail 2021 Jun 15;14(6):e007909. Epub 2021 Jun 15.

Department of Epidemiology, Mailman School of Public Health (S.M., R.T.D.), Columbia University Irving Medical Center, New York, NY.

Background: Trimethylamine N-oxide (TMAO)-a gut-derived metabolite-is elevated in heart failure (HF) and linked to poor prognosis. We investigated variations in TMAO in HF, left ventricular assist device (LVAD), and heart transplant (HT) and assessed its relation with inflammation, endotoxemia, oxidative stress, and gut dysbiosis.

Methods: We enrolled 341 patients. Read More

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Highly Sensitive, Flexible, Stable, and Hydrophobic Biofoam Based on Wheat Flour for Multifunctional Sensor and Adjustable EMI Shielding Applications.

ACS Appl Mater Interfaces 2021 Jun 15. Epub 2021 Jun 15.

State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China.

Biofoam materials are attractive alternatives for petroleum-based foams to be used to solve environmental problems. Inspired by steamed bread, we report herein a novel utilization of wheat flour (WF) with the introduction of carbon nanotubes (CNTs) to form an environmentally friendly WF/CNT composite foam. This foam displayed a high elasticity (nearly 100% shape recovery), recyclable (5000 cycles), fast (100 ms), and superstability pressure-sensing response. Read More

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End-Group Modifications with Bromine and Methyl in Nonfullerene Acceptors: The Effect of Isomerism.

ACS Appl Mater Interfaces 2021 Jun 15. Epub 2021 Jun 15.

Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China.

The development of isomeric molecules has been widely exploited in molecular structures associated with organic solar cells (OSC) and is an effective pathway to finely tune the photoelectric properties and device performance. The molecular properties of nonfullerene acceptors and the morphology of blend films can be effectively controlled by manipulating isomeric substituent positions on benzene-fused end-capping groups (EG) in acceptors. Here, three isomeric EGs were designed and synthesized which simultaneously possess an electron-withdrawing bromine and an electron-donating methyl substituent. Read More

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Effectiveness of interventions to maintain physical activity behavior (device-measured): Systematic review and meta-analysis of randomized controlled trials.

Obes Rev 2021 Jun 15:e13304. Epub 2021 Jun 15.

The School of Sport, Exercise and Health Sciences, The Centre for Lifestyle Medicine and Behaviour (CLiMB), Loughborough University, Loughborough, UK.

Physical activity has many physical, mental, and social health benefits. Interventions can be successful at helping people initiate participation, but there is a lack of evidence about the ability of these interventions to help adults maintain their physical activity. This systematic review and meta-analysis aims to address this evidence gap. Read More

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Nickel Hypersensitivity to Atrial Septal Occluders: Smoke Without Fire?

Clin Rev Allergy Immunol 2021 Jun 15. Epub 2021 Jun 15.

First Department of Cardiology, Medical School, National and Kapodistrian University of Athens, Hippokration General Hospital, Athens, Greece.

Nickel is one of the most common contact allergens worldwide; it is used as the main component of the devices used for atrial septal defects (ASDs) and patent foramen ovale (PFO) closure. Developing nickel hypersensitivity after PFO/ASD occlusion is significantly rarer described in medical literature than typical nickel contact sensitization. The exact pathophysiological mechanism of this "device syndrome" remains unknown, and many question the real incidence or even the existence of this clinical entity. Read More

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Flow-diverting device versus coil embolization for unruptured intracranial aneurysm: A meta-analysis.

Medicine (Baltimore) 2021 Jun;100(24):e26351

Department of Interventional Treatment, Binzhou People's Hospital, Binzhou, China.

Background: Both coil embolization (CE) and flow-diverting device (FDD) placement are widely used for treatment of intracranial aneurysms (IAs). The aim of this meta-analysis is to compare the relative clinical safety and efficacy of FDD and CE for the treatment of unruptured IAs.

Methods: The PubMed, Embase, and Cochrane Library databases were searched for relevant studies from the date of inception through April 2020. Read More

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