25,356 results match your criteria torsion

Validation of an Automated System for Identifying Complications of Serious Pediatric Emergencies.

Hosp Pediatr 2021 Jul 21. Epub 2021 Jul 21.

Divisions of Emergency Medicine.

Background: Illness complications are condition-specific adverse outcomes. Detecting complications of pediatric illness in administrative data would facilitate widespread quality measurement, however the accuracy of such detection is unclear.

Methods: We conducted a cross-sectional study of patients visiting a large pediatric emergency department. Read More

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Biomechanical evaluation of an intramedullary clavicle screw in simple oblique and butterfly wedge fractures.

Proc Inst Mech Eng H 2021 Jul 21:9544119211031052. Epub 2021 Jul 21.

Medical College of Georgia at Augusta University, Augusta, GA, USA.

This biomechanical study evaluates the performance of a solid titanium-alloy intra-medullary () clavicular screw in torsion and cantilever bending in cadaveric clavicle specimens with simulated simple oblique and butterfly wedge midshaft fractures. Thirty-two fresh-frozen male clavicles were sorted into six experimental groups: Torsion Control, Torsion Simple Oblique Fracture, Torsion Butterfly Wedge Fracture, Bending Control, Bending Simple Oblique Fracture, and Bending Butterfly Wedge Fracture. The experimental groups were controlled for density, length, diameter, and laterality. Read More

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Insights into Structure and Aggregation Behavior of Elastin-like Polypeptide Coacervates: All-Atom Molecular Dynamics Simulations.

J Phys Chem B 2021 Jul 21. Epub 2021 Jul 21.

Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States.

The stimuli-responsive character of elastin-like polypeptides (ELP) has led to their use in a wide range of applications. The temperature-triggered aggregation, or LCST behavior, of ELPs is a complex and multistep phenomenon, which proposed to include the structural transitions, loss of hydrophobic hydration, expulsion of water molecules and physical association of chains. Thus, the origin and detailed mechanism of LCST in ELPs is difficult to elucidate. Read More

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The effects of lower body compression on left ventricular rotational mechanics in lymphoedema (from the MAGYAR-Path Study).

ESC Heart Fail 2021 Jul 20. Epub 2021 Jul 20.

Department of Dermatology and Allergology, Albert Szent-Györgyi Clinical Center, University of Szeged, Szeged, Hungary.

Aims: Lower body half compression of bilateral secondary leg lymphoedema (LE) without relevant cardiac insufficiency gives rise to whether external leg compression may influence left ventricular (LV) function. Patients with LE were subjected to baseline two-dimensional transthoracic echocardiography (2DTTE) for general assessment then three-dimensional speckle-tracking echocardiography (3DSTE) before and 1 h after lower body half external compression for LV torsion analysis.

Methods And Results: Baseline 2DTTE was performed in the cohort of 25 LE patients, and the results were compared with those of age- and gender-matched 52 healthy controls (mean age: 47. Read More

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Exploring ultrafast photoswitching pathways in RbMnFe Prussian Blue Analogue.

Angew Chem Int Ed Engl 2021 Jul 20. Epub 2021 Jul 20.

Université Rennes 1, Institut de Physique de rennes UMR 6251, Campus de Beaulieu, 263 avenue du Général Leclerc, 35042, Rennes, FRANCE.

We study by femtosecond optical pump-probe spectroscopy the photoinduced charge transfer (CT) in the RbMnFe Prussian blue analogue. Previous studies evidenced the local nature of the photoinduced Mn III Fe II --> Mn II Fe III process, occurring within less than 1 ps. Here we show experimentally that two photoswitching pathways exist, depending on the excitation pump wavelength, which is confirmed by band structure calculations. Read More

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3D Topology Optimization and Mesh Dependency for Redesigning Locking Compression Plates Aiming to Reduce Stress Shielding.

A A Al-Tamimi

Int J Bioprint 2021 1;7(3):339. Epub 2021 Jul 1.

Industrial Engineering Department, College of Engineering, King Saud University, Riyadh 11421 Saudi Arabia.

Current fixation plates for bone fracture treatments are built with biocompatible metallic materials such as stainless steel, titanium, and its alloys (e.g., Ti6Al4V). Read More

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Overview of hospitalizations in women undergoing oocyte retrieval for ART in the French national health data system.

Hum Reprod 2021 Jul 20. Epub 2021 Jul 20.

Medical and Scientific Department, Agence de la biomédecine, Saint Denis La Plaine, France.

Study Question: What is the incidence rate of complications in women undergoing ART procedures compared to the period prior to their first oocyte retrieval?

Summary Answer: The study shows a significant increase in the post-ART incidence rate of some complications but a low overall rate of occurrence relative to the total number of oocyte retrievals.

What Is Known Already: ART, widely used in Europe, accounts for 3.3% of births in France. Read More

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N-H photodissociation dynamics of electronically excited aniline: a three dimensional time-dependent quantum wavepacket study.

Phys Chem Chem Phys 2021 Jul 19. Epub 2021 Jul 19.

Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India.

We have simulated the dynamics of 1πσ* state-mediated nonadiabatic N-H bond dissociation in photo-excited aniline (C6H5NH2). A three electronic state diabatic model potential, involving the ground, 1ππ*, and 1πσ* diabatic states, and focussing on the NH2 degrees of freedom alone is constructed using XMS-CASPT2 energies. Using a kinetic energy operator in the polyspherical framework, wavepacket dynamics in three vibrational modes, viz. Read More

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Understanding Psychiatric Disorders in Idiopathic and Inherited (Monogenic) Forms of Isolated and Combined Dystonia: A Systematic Review.

J Neuropsychiatry Clin Neurosci 2021 Jul 19:appineuropsych20110293. Epub 2021 Jul 19.

Neuropsychiatric Department, Barberry National Centre for Mental Health, Birmingham, United Kingdom.

Objective: The relationship between idiopathic and inherited (monogenic) forms of isolated and combined dystonia and psychiatric disorders remains unclear. In the present review, the authors aimed to provide increased clarity on this association through a systematic review of all controlled quantitative studies using a structured or semi-structured psychiatric interview to diagnose psychiatric disorders in individuals with these conditions.

Methods: Three databases were searched to identify 20 eligible studies, with a total of 1,275 participants fulfilling inclusion criteria. Read More

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Is Transposition of the Great Arteries Associated With Shortening of the Intrapericardial Portions of the Great Arterial Trunks? An Echocardiographic Analysis on Newborn Infants With Simple Transposition of the Great Arteries to Explore an Animal Model-Based Hypothesis on Human Beings.

J Am Heart Assoc 2021 Jul 19:e019334. Epub 2021 Jul 19.

Department of Cardiac Sciences King Abdulaziz Cardiac CenterMinistry of National Guard Health Affairs Riyadh Saudi Arabia.

Background The pathogenesis of transposition of the great arteries (TGA) as a congenital heart defect of the outflow tract with discordant ventriculoarterial connections remains an enigma. TGA usually have parallel great arteries suggesting that deficient torsion of the embryonic arterial heart pole might cause discordant ventriculoarterial connections. It has been speculated that deficient elongation of the embryonic outflow tract might prevent its normal torsion resulting in TGA. Read More

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Transparent, Flexible Plasmonic Ag NP/PMMA Substrates Using Chemically Patterned Ferroelectric Crystals for Detecting Pesticides on Curved Surfaces.

ACS Appl Mater Interfaces 2021 Jul 18. Epub 2021 Jul 18.

CL Technology Co., Ltd., New Taipei 24158, Taiwan.

Transparent and flexible surface-enhanced Raman scattering (SERS) substrates have attracted much interest for the detection of probe molecules on the curved surfaces of real samples, but a facile route to fabricate such substrates is still lacking. Herein, we present a rationally designed, high-performance flexible SERS substrate fabricated using a simple drop and peel-off technique for the ultrasensitive detection of pesticides. The proposed SERS substrate consists of a polymethyl methacrylate (PMMA) film anchored with plasmonic silver nanoparticles (Ag NPs), which are photoreduced using chemically patterned ferroelectric templates. Read More

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Effect of Bone Quality and Leg Depth on the Biomechanical Performance of a Nitinol Staple.

J Foot Ankle Surg 2021 Jun 22. Epub 2021 Jun 22.

Chief, Division of Foot and Ankle Surgery, Harvard Medical School; Beth Israel Deaconess Medical Center, Boston, MA.

The use of Nitinol compression staples has increased in foot and ankle procedures due to their ease of delivery and ability to offer sustained, dynamic compression. Prior biomechanical studies have predominantly examined mechanical performance in healthy bone models without investigating the effect of unicortical versus bicortical fixation. The purpose of this study was to examine the effect of bone quality and staple leg depth on the biomechanical performance of Nitinol staples in a bicortical bone model. Read More

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[Diagnosis, treatment and outcome of adnexal torsion at different gestational weeks during pregnancy].

Zhonghua Yi Xue Za Zhi 2021 Jul;101(27):2159-2163

Department of Obstetrics and Gynecology, Peking University Third Hospital,National Clinical Research Center for Obstetrics and Gynecology(Peking University Third Hospital),National Center for Healthcare Quality Management in Obstetrics, Beijing 100191, China.

To investigate the clinical characteristics, diagnosis, treatment and outcome of adnexal torsion at different gestational weeks during pregnancy. A retrospective analysis was conducted of the clinical data of 24 pregnancy patients with adnexal torsion, aged 21-38 (30.6±4. Read More

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Diffuse dermal angiomatosis of the breast: an emerging entity in the setting of cutaneous reactive angiomatoses.

Clin Dermatol 2021 Mar-Apr;39(2):271-277. Epub 2020 Oct 16.

Unit of Dermatology, Department of Medical Sciences and Public Health, Dermatology Clinic, University of Cagliari, Cagliari, Italy.

New and emerging types of cutaneous vascular (capillary) proliferations have been described or better categorized in the last few years. They include reactive angioendotheliomatosis, acroangiodermatitis (pseudo-Kaposi sarcoma), diffuse dermal angiomatosis, intravascular histiocytosis, glomeruloid angioendotheliomatosis, and angiopericytomatosis (angiomatosis with cryoproteins). Clinically, they are characterized by multiple, red violaceous, and purpuric patches and plaques, sometimes evolving toward necrosis and ulceration with a wide distribution but a propensity to involve the extremities. Read More

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October 2020

Superior oblique tendon thinning as a surgical treatment for Brown syndrome.

J AAPOS 2021 Jul 13. Epub 2021 Jul 13.

Department of Ophthalmology, Hospital Universitari Joan XXIII, Universitat Rovira i Virgili, Tarragona, Spain; Centro de Estrabismo, Clínica DYTO, Barcelona, Spain. Electronic address:

Purpose: To evaluate the results of a superior oblique thinning technique for the treatment of congenital Brown syndrome.

Methods: The medical records of consecutive patients at a single institution who were diagnosed with congenital Brown syndrome and underwent superior oblique thinning were retrospectively reviewed. In all cases, the prism cover test was used to assess ocular alignment. Read More

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Complications of hip preserving surgery.

EFORT Open Rev 2021 Jun 28;6(6):472-486. Epub 2021 Jun 28.

Department of Orthopaedic and Trauma Surgery, Inselspital, University of Bern, Bern, Switzerland.

Preoperative evaluation of the pathomorphology is crucial for surgical planning, including radiographs as the basic modality and magnetic resonance imaging (MRI) and case-based additional imaging (e.g. 3D-CT, abduction views). Read More

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Synergy of Solid-State NMR, Single-Crystal X-ray Diffraction, and Crystal Structure Prediction Methods: A Case Study of Teriflunomide (TFM).

Cryst Growth Des 2021 Jun 10;21(6):3328-3343. Epub 2021 May 10.

Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.

In this work, for the first time, we present the X-ray diffraction crystal structure and spectral properties of a new, room-temperature polymorph of teriflunomide (TFM), CSD code 1969989. As revealed by DSC, the low-temperature TFM polymorph recently reported by Gunnam et al. undergoes a reversible thermal transition at -40 °C. Read More

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Incidence of Different Types of Intracanal Fracture of Nickel-Titanium Rotary Instruments: A Systematic Review.

J Contemp Dent Pract 2021 Apr 1;22(4):427-434. Epub 2021 Apr 1.

Department of Oral and Maxillo-Facial Sciences, Sapienza University of Rome, Rome, Italy.

Aim: The aim of this systemic review is to investigate these parameters by analyzing the characteristics of fractured instruments to determine which is the most relevant mechanical stress that induces intracanal separation .

Background: The fracture of nickel-titanium (Ni-Ti) instruments is a result of flexural fatigue and torsional fatigue. An electronic search was conducted in MEDLINE database, Web of Science, and Cochrane following preferred reporting items for systematic reviews and meta-analyses guidelines. Read More

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Nickel-Titanium Rotary Instruments: An Comparison (Torsional Resistance of Two Heat-treated Reciprocating Files).

J Contemp Dent Pract 2021 Apr 1;22(4):361-364. Epub 2021 Apr 1.

Department of Oral and Maxillo-facial Sciences, Sapienza University of Rome, Rome, Italy.

Aim And Objective: The present study aims to evaluate the difference in torsional resistance of two reciprocating nickel-titanium (Ni-Ti) rotary files: WaveOne Gold and EdgeOne Fire.

Materials And Methods: A total of 40 nickel-titanium rotary instruments ( = 40): 20 WaveOne Gold Small (WOGS) and 20 EdgeOne Fire Small (EOFS) were divided into two groups. Each instrument was tested using a torsional resistance device already validated in previous studies to evaluate and compare torsional resistance. Read More

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Bilateral vestibulopathy decreases self-motion perception.

J Neurol 2021 Jul 14. Epub 2021 Jul 14.

Department of Otorhinolaryngology and Head and Neck Surgery, Division of Balance Disorders, School for Mental Health and Neuroscience, Maastricht University Medical Center, P. Debyelaan 25, 6229 HX, Maastricht, The Netherlands.

Objective: Current diagnostic criteria for bilateral vestibulopathy (BV) primarily involve measurements of vestibular reflexes. Perceptual self-motion thresholds however, are not routinely measured and their clinical value in this specific population is not yet fully determined. Objectives of this study were (1) to compare perceptual self-motion thresholds between BV patients and control subjects, and (2) to explore patterns of self-motion perception performance and vestibular function in BV patients. Read More

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Electronic Spectroscopy of - and --Vinylbenzyl Radicals.

J Phys Chem A 2021 Jul 14. Epub 2021 Jul 14.

Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Boulevard, Boston, Massachusetts 02125, United States.

The (″)-(″) electronic transition of resonance-stabilized radical CH isomers - and -vinylbenzyl (MVB) has been investigated using resonant two-color two-photon ionization (R2C2PI) and laser-induced fluorescence. The radicals were produced in a discharge of -vinyltoluene diluted in Ar and probed under jet-cooled conditions. The origin bands of the and conformers are at 19 037 and 18 939 cm, respectively. Read More

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Cyclotorsion Measurement on Scanning Laser Ophthalmoscopy Imaging Compared With Fundus Photography in Patients With Fourth Nerve Palsy and Healthy Controls: CySLO-IV Study.

J Neuroophthalmol 2020 Jun 19. Epub 2020 Jun 19.

Department of Ophthalmology (MSK, GPJ, KL), University Hospital Zurich, University of Zurich, Zurich, Switzerland; Department of Biostatistics (SS, UH), Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland; Department of Ophthalmology (GLT), University of Basel, Basel, Switzerland; and Institute of Molecular and Clinical Ophthalmology Basel (GLT), Basel, Switzerland.

Background: The purpose of the study is to evaluate the agreement of the foveopapillary angle (FPA) on conventional fundus photography (c-FPA) with the FPA on scanning laser ophthalmoscopy (SLO) imaging (SLO-FPA) in patients with fourth nerve palsy and healthy controls (HCs).

Methods: The FPA was measured in both eyes of 25 patients and 25 HCs in synedra View (c-FPA) and with the integrated algorithm of the Heidelberg Spectralis OCT (SLO-FPA). The primary endpoint was the agreement of both measurements. Read More

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Protective Effects of Topical Application of Nitrite on Testicular Ischemia-Reperfusion Injury in Rats.

Oxid Med Cell Longev 2021 26;2021:5514537. Epub 2021 Jun 26.

The Institute for the 3Rs & Department of Laboratory Animal Medicine, College of Veterinary Medicine, Konkuk University, 120, Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea.

Testicular torsion is a urologic emergency induced by torsion of the spermatic cord, interrupting blood circulation to the testis. Therapeutic options for testicular torsion, except surgical restoration of testis, are rarely applied in clinical practice. This study, therefore, investigated whether topical application of nitrite (NO ) is beneficial in tissue damage due to testicular ischemia-reperfusion (I/R) injury in rats. Read More

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Diagnostic dilemma of isolated fallopian tube torsion.

BMJ Case Rep 2021 Jul 13;14(7). Epub 2021 Jul 13.

Department of Female Pelvic Medicine and Reconstructive Surgery, Ascension St John Hospital, Detroit, Michigan, USA.

Paratubal cysts are fluid-filled sacs that grow adjacent to the fallopian tube which can rarely result in torsion. Isolated fallopian tube torsion (IFTT) is a gynaecological emergency that warrants urgent laparoscopic detorsion to salvage the affected tube. IFTT has a proclivity to affect adolescents between the ages of 12 and 15 years and is rarely seen in premenarchal or perimenopausal women. Read More

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Effect of Cholesterol Versus Ergosterol on DPPC Bilayer Properties: Insights from Atomistic Simulations.

J Phys Chem B 2021 Jul 13;125(28):7679-7690. Epub 2021 Jul 13.

Institute of Physical Chemistry, University of Muenster, Corrensstr. 28/30, 48149 Muenster, Germany.

Sterols have been ascribed a major role in the organization of biological membranes, in particular for the formation of liquid ordered domains in complex lipid mixtures. Here, we employed molecular dynamics simulations to compare the effects of cholesterol and ergosterol as the major sterol of mammalian and fungal cells, respectively, on binary mixtures with 1,2-dipalmitoyl--glycero-3-phosphocholine (DPPC) as a proxy for saturated lipids. In agreement with previous work, we observe that the addition of sterol molecules modifies the order of DPPC both in the gel phase and in the liquid phase. Read More

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Laparoendoscopic Ovarian-Sparing Surgery of Adnexal Tumors in Children and Adolescents by General Gynecologists: A 10-Year, Retrospective Cohort Study.

J Laparoendosc Adv Surg Tech A 2021 Jul 12. Epub 2021 Jul 12.

Department of General Gynecology, Clinic for Gynecology and Obstetrics, University Clinical Center Tuzla, Tuzla, Bosnia and Herzegovina.

In pediatric and adolescent gynecology, ovarian-sparing surgery (OSS) is an approach for preserving the ovaries affected by tumors and torsion during surgical treatment. We analyzed participants from a tertiary Gynecology and Obstetrics University Hospital. Participants were patients <19 years of age with adnexal tumors managed surgically with removal of pathologically confirmed ovarian tissue in the period from 2008 to 2017. Read More

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Short stem hip arthroplasty via the minimally invasive direct anterior approach.

Oper Orthop Traumatol 2021 Jul 12. Epub 2021 Jul 12.

Department of Orthopaedic Surgery, University of Wuerzburg, Koenig-Ludwig-Haus, Brettreichstr. 11, 97074, Wuerzburg, Germany.

Objective: Tissue-sparing, minimally invasive hip arthroplasty via the direct anterior approach (DAA) using a partially neck-preserving, calcar-guided short stem.

Indications: Primary and secondary osteoarthritis of the hip due to developmental dysplasia, femoroacetabular impingement, femoral head necrosis or trauma sequelae.

Contraindications: Severe osteoporosis, active infection, American Society of Anesthesiologists (ASA) > III, large metaphyseal bone defects, severe metaphyseal deformities, Dorr type C femur. Read More

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Association between the toe angle and bony factors in the transverse plane for osteoarthritic knees compared with healthy knees.

Biomed Mater Eng 2021 Jul 7. Epub 2021 Jul 7.

Division of Orthopedic Surgery, Department of Regenerative and Transplant Medicine, Niigata University Graduate School of Medical and Dental Science, Niigata, Japan.

Background: The association between the toe angle and bony rotational factors is critical to explain issues related to the onset and progression of knee osteoarthritis (OA).

Objective: The study aimed to clarify the association between the toe angle and each of the femoral and tibial transvers direction relative to gait direction, rotational knee alignment, and bony torsional deformity for the subjects with knee OA.

Methods: This study evaluated 58 knees in 24 healthy elderly (72 ± 5 years) and 34 varus knee OA (72 ± 6 years). Read More

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The Three-Dimensional Morphology of Femoral Medullary Cavity in the Developmental Dysplasia of the Hip.

Front Bioeng Biotechnol 2021 24;9:684832. Epub 2021 Jun 24.

Beijing Advanced Innovation Centre for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China.

Objective: This study aimed to assess the morphology of the femoral medullary canal in subjects with developmental dysplasia of the hip (DDH) with the intent of improving the design of femoral stems in total hip arthroplasty.

Methods: Computed tomography images of 56 DDH hips, which were classified into Crowe I to Crowe IV, and 30 normal hips were collected and used to reconstruct three-dimensional morphology of the femoral medullary cavity. Images of twenty-one cross sections were taken from 20 mm above the apex of the lesser trochanter to the isthmus. Read More

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