74,095 results match your criteria transverse


An Optimized Model of Hypertrophic Preconditioning Confers Cardioprotection in the Mouse.

J Surg Res 2021 Apr 14;264:544-552. Epub 2021 Apr 14.

Department of Cardiology, First Affiliated Hospital of Medical School, Xi'an Jiaotong University, Xi'an Shaanxi, China. Electronic address:

Background: Conventional models of hypertrophic preconditioning (C-HP) can be established surgically through transverse aortic constriction (TAC) → deconstriction (De-TAC) → reconstriction (Re-TAC) characterized by dynamic afterload while it exerts technical difficulty on operators and poses high mortality during perioperative period in mice. We aimed to introduce an optimized method for obtaining a hypertrophic preconditioning (O-HP) model for further study on cardiac hypertrophy.

Methods: Ninety mice were divided into four groups: sham, TAC, C-HP, and O-HP. Read More

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An ultrasound observation study on the levator hiatus with or without diastasis recti abdominis in postpartum women.

Int Urogynecol J 2021 Apr 17. Epub 2021 Apr 17.

Department of Ultrasonography, The Second Affiliated Hospital of Harbin Medical University, No. 246, Xuefu Road, Nanggang District, Harbin, 150081, People's Republic of China.

Introduction And Hypothesis: We hypothesized that differences in post-partum levator hiatus (LH) measurements, as well as the area of urethra and bladder (AUB), viewed under ultrasound, correlate with diastasis rectus abdominis (DRA) occurrence. The primary objective of this study is to determine ultrasound parameters available for diagnosing DRA in post-partum women. We compared LH and AUB measurements under ultrasound in primiparous women, with and without DRA, at 24-26 weeks postpartum. Read More

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Virtual laparoscopic imaging for performing central vascular ligation through laparoscopic surgery for transverse colon cancer.

Tech Coloproctol 2021 Apr 16. Epub 2021 Apr 16.

Department of Gastrointestinal and Pediatric Surgery, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, 160-0023, Japan.

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Should the location of distal tibial plating be influenced by the varus or valgus fracture pattern of tibial pilon fracture?

Arch Orthop Trauma Surg 2021 Apr 16. Epub 2021 Apr 16.

Department of Orthopaedic Surgery, National University Hospital, National University Health System, 1E Kent Ridge Road, Singapore, 119228, Singapore.

Introduction: Operative treatment of tibial pilon fracture is challenging. There is a lack of consensus and only one clinical study on the optimal location of distal tibial plating for fixation of pilon fractures based on varus or valgus fracture patterns. We hypothesize that complications rates, specifically mechanical complications, are not influenced by the location of the tibial plating in the fixation of pilon fractures with respect to varus or valgus fracture patterns. Read More

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Cervical spinal cord infarction associated with coronavirus infectious disease (COVID)-19.

J Clin Neurosci 2021 May 8;87:89-91. Epub 2021 Mar 8.

Department of Neurology, Weill Cornell Medicine, New York, NY, USA. Electronic address:

Coronavirus disease (COVID-19) has a number of emerging neurological manifestations in addition to pneumonia and respiratory distress. In what follows, we describe a case of a previously healthy young man with severe COVID-19 who subsequently developed an acute flaccid paralysis. Work up revealed a lesion in his cervical spinal cord concerning for spinal infarction or transverse myelitis. Read More

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Advection-enhanced diffusion in biased convection arrays.

Phys Rev E 2021 Mar;103(3):L030106

Department of Chemistry, Presidency University, Kolkata 700073, India.

We numerically investigated the transport of a passive colloidal particle in a one-dimensional periodic array of planar counter-rotating convection rolls at high Péclet numbers. We show that advection-enhanced diffusion is drastically suppressed by an external transverse bias but strongly reinforced by a longitudinal drive of appropriate intensity. Both effects are magnified by imposing free-slip flows at the array's edges. Read More

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Open-geometry modal method based on transverse electric and transverse magnetic mode expansion for orthogonal curvilinear coordinates.

Phys Rev E 2021 Mar;103(3-1):033301

Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, Building 343, DK-2800 Kongens Lyngby, Denmark.

A vectorial modal method is presented based on transverse magnetic and transverse electric mode expansion, which significantly simplifies the evaluation of the operator matrix. The method, which features a true open boundary condition, is introduced for an orthogonal curvilinear coordinate system with the specific examples of circular and elliptical geometries presented. We validate the method by considering challenging problems, such as the calculation of spontaneous emission rates, of modal reflection coefficients and of the effect of the emitter spatial misalignment on the spontaneous emission β factor. Read More

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Thermodynamic properties of the spin S=3/2 quantum ferromagnetic Blume-Capel model in a transverse crystal field.

Phys Rev E 2021 Mar;103(3-1):032142

Departamento de Física, Universidade Federal de Minas Gerais, Caixa Postal 702, 30123-970, Belo Horizonte-MG, Brazil.

The thermodynamic properties of the spin S=3/2 ferromagnetic Ising model in the presence of transverse and longitudinal crystal fields (equivalent to the Blume-Capel model with a transverse crystal field) have been studied by using two different approaches: (i) a zero-temperature mapping of the system onto a spin-1/2 quantum Ising model in longitudinal and transverse fields, together with time-independent quantum perturbation theory; and (ii) a standard mean-field approximation within the framework of the Bogoliubov inequality for the free energy. A very rich phase diagram, with different kinds of multicritical behavior, has been obtained. The results show first- and second-order transition lines, tricritical and tetracritical points, critical end points with a two-phase coexistence, double critical end points, and also double noncritical end points. Read More

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Increased tissue-level storage modulus and hardness with age in male cortical bone and its association with decreased fracture toughness.

Bone 2021 Apr 13:115949. Epub 2021 Apr 13.

Department of Orthopaedic Surgery, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Center for Bone Biology, Vanderbilt University Medical Center, Nashville, TN 37232, USA; Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, TN 37212, USA. Electronic address:

The incidence of bone fracture increases with age, due to both declining bone quantity and quality. Toward the goal of an improved understanding of the causes of the age-related decline in the fracture toughness of male cortical bone, nanoindentation experiments were performed on femoral diaphysis specimens from men aged 21-98 years. Because aged bone has less matrix-bound water and dry bone is less viscoelastic, we used a nanoindentation method that is sensitive to changes in viscoelasticity. Read More

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Three-dimensional Computed Tomography Posterior Iliac Oblique Images Enhance Preoperative Planning for Acetabular Fracture Surgery.

J Surg Orthop Adv 2021 ;30(1):50-54

Department of Orthopaedics, Harborview Medical Center, Seattle, Washington.

The advent of computed tomography and development of three-dimensional (3-D) reconstructions has allowed for profound advances in the understanding of complex acetabular fractures. The authors sought to determine the impact of 3-D reconstructions on understanding of the morphology of these injuries. A survey of 20 fellowship-trained orthopaedic trauma surgeons was undertaken to assess the utility of these reconstructions on understanding three complex posterior acetabulum fractures. Read More

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January 2021

Transverse Beam Emittance Measurement by Undulator Radiation Power Noise.

Phys Rev Lett 2021 Apr;126(13):134802

Argonne National Accelerator Laboratory, Lemont, Illinois 60439, USA.

Generally, turn-to-turn power fluctuations of incoherent spontaneous synchrotron radiation in a storage ring depend on the 6D phase-space distribution of the electron bunch. In some cases, if only one parameter of the distribution is unknown, this parameter can be determined from the measured magnitude of these power fluctuations. In this Letter, we report an absolute measurement (no free parameters or calibration) of a small vertical emittance (5-15 nm rms) of a flat beam by this method, under conditions, when it is unresolvable by a conventional synchrotron light beam size monitor. Read More

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Extra-basal ganglia iron content and non-motor symptoms in drug-naïve, early Parkinson's disease.

Neurol Sci 2021 Apr 16. Epub 2021 Apr 16.

Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.

Background: Although iron dyshomeostasis is associated with Parkinson's disease (PD) pathogenesis, the relationship between iron deposition and non-motor involvement in PD is not fully understood. In this study, we investigated basal ganglia and extra-basal ganglia system iron contents and their correlation with non-motor symptoms in drug-naïve, early-stage PD patients.

Methods: We enrolled 14 drug-naïve, early-stage PD patients and 12 age/sex-matched normal controls. Read More

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Radiologic evaluation of the fossa navicularis: incidence, morphometric features, and clinical implications.

Surg Radiol Anat 2021 Apr 16. Epub 2021 Apr 16.

Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Gaziantep University, Gaziantep, Turkey.

Introduction: The aim of this study was to determine the incidence and morphometric and morphological characteristics of fossa navicularis (FN) on cone beam computed tomography (CBCT) images of healthy adults MATERIALS AND METHODS: CBCT images of 900 individuals (450 males, 450 females, over the age of 18) admitted to Gaziantep University, Dentistry Faculty were retrospectively examined. The incidence and shape of FN were determined. Transverse diameter (TDFN), sagittal diameter (SDFN), depth in transverse section (DFNT), depth in sagittal section (DFNS), and the shortest distance between the deepest point of FN and intracranial cavity (FNI) were measured. Read More

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Morphological and molecular characterization of Chitwood, 1957 (Dorylaimida: Leptonchidae) from Florida, with the first molecular study of the genus.

J Nematol 2021 20;53. Epub 2021 Mar 20.

Florida Department of Agriculture and Consumer Services, DPI, Nematology Section, P.O. Box 147100, Gainesville, FL, 32614-7100.

A population of , recently collected under the canopy of associated live oak trees in north Florida, was studied and described with an integrative approach, including the first molecular study of the genus. This Florida population is characterized by its 2.30 to 3. Read More

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A Rare Thrombophilic Occurrence: Dural Venous Sinus Thrombosis in a Patient with Significant Family History of Protein S Deficiency.

Cureus 2021 Mar 13;13(3):e13866. Epub 2021 Mar 13.

Internal Medicine, St. Luke's University Health Network, Easton, USA.

Protein S is a potent anticoagulant that downregulates thrombin formation and is a vitamin K-dependent glycoprotein which is primarily synthesized in the liver. A deficiency in this protein or decreased activity, as seen in hereditary protein S deficiency, can lead to life-threatening thrombosis. Hereditary protein S deficiency is a rare disease as listed by the National Organization for Rare Disorders (NORD). Read More

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Evaluation of Cartilaginous Endplate Degeneration Based on Magnetic Resonance Imaging.

J Healthc Eng 2021 23;2021:5534227. Epub 2021 Mar 23.

Department of Orthopedics, Panyu Hospital of Chinese Medicine, Guangzhou City, Guangdong Province 511400, China.

In order to carry out the evaluation of cartilaginous endplate degeneration based on magnetic resonance imaging (MRI), this paper retrospectively analyzed the MRI data from 120 cases of patients who were diagnosed as lumbar intervertebral disc degeneration and underwent MRI examinations in the designated hospital of this study from June 2018 to June 2020. All cases underwent conventional sagittal and transverse T1WI and T2WI scans, and some cases were added with sagittal fat-suppression T2WI scans; then, the number of degenerative cartilaginous endplates and its ratio to degenerative lumbar intervertebral discs were counted and calculated, and the T1WI and T2WI signal characteristics of each degenerative cartilage endplate and its correlation with cartilaginous endplate degeneration were summarized, compared, and analyzed to evaluate the cartilaginous endplate degeneration by those magnetic resonance information. The study results show that there were 33 cases of cartilaginous endplate degeneration, accounting for 27. Read More

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Nematicity and competing orders in superconducting magic-angle graphene.

Science 2021 Apr;372(6539):264-271

Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Strongly interacting electrons in solid-state systems often display multiple broken symmetries in the ground state. The interplay between different order parameters can give rise to a rich phase diagram. We report on the identification of intertwined phases with broken rotational symmetry in magic-angle twisted bilayer graphene (TBG). Read More

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Repeatability and Reliability of Quantified Ultrasound Biomicroscopy Image Analysis of the Ciliary Body at the Pars Plicata.

Ultrasound Med Biol 2021 Apr 12. Epub 2021 Apr 12.

Department of Ophthalmology and Visual Sciences, University of Maryland School of Medicine, Baltimore, Maryland, USA. Electronic address:

Most of the ciliary body and ciliary processes of the eye cannot be directly visualized in vivo because of the posterior location of the pars plicata to the posterior chamber and iris. However, ciliary anatomy can be effectively imaged using ultrasound biomicroscopy (UBM) by placing the probe close to the limbus, perpendicular to this structure. Previous studies measuring ciliary body parameters in meridian UBM images found that these parameters were measured with poor reliability and repeatability. Read More

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Case report and review of literature of a rare congenital disorder: Adams-Oliver syndrome.

BMC Anesthesiol 2021 Apr 15;21(1):117. Epub 2021 Apr 15.

Department of Anesthesiology, Rutgers New Jersey Medical School, Newark, New Jersey, USA.

Background: Adams-Oliver syndrome is characterized by the combination of congenital scalp defects and terminal transverse limb defects. In some instances, cardiovascular malformations and orofacial malformations have been observed. Little is written with regards to the anesthetic management and airway concerns of patients with Adams-Oliver syndrome. Read More

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First Report of Leaf Spot in Farfugium japonicum Caused by Alternaria alternata in China.

Plant Dis 2021 Apr 15. Epub 2021 Apr 15.

HUNAN AGRICULTURAL UNIVERSITY, PLANT DISEASE, ROOM S416, BUILDING 11, COLLEGE OF PLANT PROTECTION, HUNAN AGRICULTUTAL UNIVERSITY, 1 NONGDA ROAD, FURONG DISTRICT, CHANGSHA, HUNAN,CHINA, CHANGSHA, HUNAN, China, 410128;

Farfugium japonicum (L.) Kitam (with the common name leopard plant) is known as a garden and medical herb, and belongs to the family Asteraceae. In May 2019, a leaf spot disease was observed on the upper leaf surface of F. Read More

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Effect of citalopram on hippocampal volume in first-episode schizophrenia: Structural MRI results from the DECIFER trial.

Psychiatry Res Neuroimaging 2021 Apr 7;312:111286. Epub 2021 Apr 7.

Department of Psychiatry, NYU Langone Health, 1 Park Avenue, New York, NY 10016, United States of America; Nathan Kline Institute for Psychiatric Research, 140 Old Orangeburg Road, Orangeburg, NY 10962, United States of America. Electronic address:

Hippocampal volume loss is prominent in first episode schizophrenia (FES) and has been associated with poor clinical outcomes and with BDNF genotype; antidepressants are believed to reverse hippocampal volume loss via release of BDNF. In a 12-month, placebo-controlled add-on trial of the antidepressant, citalopram, during the maintenance phase of FES, negative symptoms were improved with citalopram. We now report results of structural brain imaging at baseline and 6 months in 63 FES patients (34 in citalopram group) from the trial to assess whether protection against hippocampal volume loss contributed to improved negative symptoms with citalopram. Read More

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Characterization of a novel enamel sealer for bioactive remineralization of white spot lesions.

J Dent 2021 Apr 12:103663. Epub 2021 Apr 12.

Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, 21589, Saudi Arabia; Alfarabi Private Dental College, Jeddah, 23643, Saudi Arabia. Electronic address:

Objectives: 45S5 Bioglass is bioactive glass capable of releasing ions that can interact with dental hard tissues. The current study aimed at examining the effectiveness of 45S5 Bioglass in remineralizing enamel white spot lesion (WSL) as well as its effect on the bond strength of orthodontic brackets bonded to demineralized enamel.

Materials And Methods: WSLs were induced in in the buccal surfaces of 135 human extracted teeth by storage in acid solution pH 4. Read More

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Reoperative Total Arch Repair Using a Trifurcated Graft and Selective Antegrade Cerebral Perfusion.

Ann Thorac Surg 2021 Apr 12. Epub 2021 Apr 12.

Division of Cardiothoracic Surgery, Department of Surgery, Westchester Medical Center, New York Medical College, Valhalla, NY.

Background: This study reviews the outcomes of our reoperative total arch repair (TAR) technique using a trifurcated graft and selective antegrade cerebral perfusion (SACP).

Methods: Fifty patients underwent reoperative TAR from January 2005 to September 2020, with either a one-stage (N=9), or two-stage repair (N=41). The two-stage technique includes minimal dissection of the mediastinal structures, an arch-first technique using a trifurcated graft, and construction of a classical elephant trunk via a partial transverse incision distally in the old-graft or in the aorta just distal to the old graft. Read More

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Behavior of SPPs in chiral-graphene-chiral structure.

Opt Lett 2021 Apr;46(8):1975-1978

In this Letter, considering the chiral-graphene-chiral structure, we investigate the more universal dispersion relation covering the achiral cases, the effect of the chirality of a medium, and the chemical potential of graphene on the behavior of graphene surface plasmon polaritons (GSPPs) and transverse spin density, which is key to understanding the lateral optical force. This research is dedicated to looking for a regulating mechanism based on chirality and graphene to apply in devices of information processing and biosensor for identifying molecular chirality. We found the averaging effect of chirality in both sides of graphene in tuning the behavior of GSPPs. Read More

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Polygonal patterns of confined light.

Opt Lett 2021 Apr;46(8):1836-1839

We propose a technique for the generation of polygonal optical patterns in real space using a combined effect of the spin-orbit interaction and confinement of light in the plane of a dielectric optical microcavity. The spin-orbit interaction emerging from the splitting in transverse electric (TE) and transverse magnetic (TM) optical modes of the microcavity gives rise to oscillations in space of propagating macroscopic wave packets of polarized photons. Confined in a harmonic potential, the latter follow closed trajectories of a polygonal form. Read More

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''Comparison of Two Surgical Techniques for the Treatment of Transverse Olecranon Fractures: A Finite Element Study''.

Int J Med Robot 2021 Apr 14. Epub 2021 Apr 14.

Clinic of Orthopedics and Traumatology, Tire State Hospital, İzmir, Turkey.

Background: In this study, we aimed to compare the stability of traditional tension band wiring (TBW) and screw combined TBW (SC-TBW) fixation methods performed for a transverse olecranon osteotomy-fracture during different degrees of elbow movement by using finite element analysis (FEA).

Methods: Three-dimensional solid modeling of the olecranon was obtained by computed tomography (CT) images. Transverse olecranon fracture was created and fixed by TBW and SC-TBW with respect to triceps muscle force. Read More

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Which ultrasound image plane is appropriate for evaluating the taller-than-wide sign in the risk stratification of thyroid nodules?

Eur Radiol 2021 Apr 14. Epub 2021 Apr 14.

Department of Radiology, Gangneung Asan Hospital, University of Ulsan College of Medicine, 38 Bangdong-gil, Sacheon-myeon, Gangneung-si, Gangwon-do, 25440, Republic of Korea.

Objectives: This study aimed to determine the ultrasound (US) image plane appropriate for evaluating the taller-than-wide (TTW) sign in the risk stratification of thyroid nodules using the five widely used risk stratification systems (RSSs).

Methods: A total of 1905 consecutive thyroid nodules with final diagnoses were included. The TTW sign was prospectively assessed in the transverse and longitudinal US image planes. Read More

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Petrosal Approach With Preservation of the Superior Petrosal Sinus (the Graceful Petrosal) for Resection of Giant Trigeminal Schwannoma: 2-Dimensional Operative Video.

Oper Neurosurg (Hagerstown) 2021 Apr;20(5):E342-E343

Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.

Trigeminal schwannomas are benign tumors amendable to curative surgical resection.1 Excellent outcomes, with preservation and improvement of cranial nerve function, including trigeminal nerve function, have been reported with microsurgical resection through skull base approaches.2 Dumbell shaped tumors, involving the middle and posterior fossa, are more challenging. Read More

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Fecal Calprotectin, CRP and Leucocytes in IBD Patients: Comparison of Biomarkers With Biopsy Results.

J Can Assoc Gastroenterol 2021 Apr 27;4(2):84-90. Epub 2020 Mar 27.

Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada.

Background: This study aimed to compare fecal calprotectin (FC) levels with other commonly used parameters as part of patient care during evaluation for inflammatory bowel disease (IBD).

Methods: We recruited adult IBD patients with ulcerative colitis (UC) and Crohn's disease (CD) and compared the results of the patient's biopsy results (i.e. Read More

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Transverse myelitis masquerading as cauda equina syndrome, stroke and cervical myelopathy.

Biomedicine (Taipei) 2020 28;10(1):45-50. Epub 2020 Mar 28.

Division of Spine, Department of Orthopaedic Surgery, Tan Tock Seng Hospital, Singapore.

Transverse myelitis is an uncommon but well-defined neurological syndrome. However, a high index of suspicion is needed to diagnose this condition, especially when it occurs in concomitance with preexisting spinal canal stenosis. We report our patient, a 48 year old male, who initially presented to our spine clinic with acute onset unilateral lower limb weakness associated with urinary retention, which was suspected to be cauda equina syndrome due to a prolapsed intervertebral disc. Read More

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