241,363 results match your criteria thickness

Endoscopic full-thickness resection and post-procedural appendicitis: every advantage has its disadvantage.

Endoscopy 2021 May 22;53(5):561. Epub 2021 Apr 22.

Department of Gastroenterology and Hepatology, Imelda General Hospital, and Imelda Clinical GI Research Center, Bonheiden, and Department of Gastroenterology and Hepatology, University Hospitals Leuven, KU Leuven, Belgium.

View Article and Full-Text PDF

Toward a comparison and an optimization of CT protocols using new metrics of dose and image quality part I: prediction of human observers using a model observer for detection and discrimination tasks in low-dose CT images in various scanning conditions.

Phys Med Biol 2021 Apr 22. Epub 2021 Apr 22.

Assistance Publique Hopitaux de Marseille, Marseille, Provence-Alpes-Côte d\'Azur, FRANCE.

In the context of reducing the patient dose coming from scanner (Computed Tomography) examinations without penalizing the diagnosis, the assessment of both patient dose and image quality (IQ) with relevant metrics is crucial. The present study represents the first stage in a larger work, aiming to compare and optimize CT protocols using new dose and IQ metrics. We proposed here to evaluate the capacity of the Non-PreWhitening matched filter with an eye (NPWE) model observer to be a robust and accurate estimation of IQ. Read More

View Article and Full-Text PDF

Antibacterial Effect of Copper Sulfide Nanoparticles on Infected Wound Healing.

Surg Infect (Larchmt) 2021 Apr 21. Epub 2021 Apr 21.

Department of Orthopedics, Clinical Medical College of Yangzhou University, Subei People's Hospital, Yangzhou, China.

It is widely acknowledged that pathogenic germs delay wound healing to some extent. To explore factors influencing the wound healing process, the current study was conducted to evaluate the antibacterial effect of topical application of copper sulfide nanoparticles (CuS NPs) in vitro and on infected wound healing process in the rat model. In this study, the morphology and size of CuS NPs were detected. Read More

View Article and Full-Text PDF

Impact of constant light exposure during pregnancy on skin of neonatal New Zealand rabbits: structural and ultrastructural study.

Braz J Med Biol Res 2021 19;54(6):e10722. Epub 2021 Apr 19.

Department of Physiotherapy, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia.

Continuous industrial productivity and modern societies have resulted in excess artificial light. The altered circadian rhythm causes many diseases. During intrauterine life, the mother's maternal melatonin rhythm has a major role in influencing organ development. Read More

View Article and Full-Text PDF

Increased serum chemerin levels associated with carotid intima-media thickness.

Arq Neuropsiquiatr 2021 Mar;79(3):189-194

Firat University, Faculty of Medicine, Department of Medical Biochemistry and Clinical Biochemistry, Elazig, Turkey.

Background: Elevated levels of chemerin can predict future ischemic cerebrovascular disease. Although chemerin is thought to play a role in atherosclerotic inflammation, whether circulating chemerin levels are associated with the severity of atherosclerosis remains to be determined.

Objectives: Through the use of carotid Doppler ultrasonography, our aim in this study was to investigate the relationships of serum chemerin levels with carotid intima-media thickness (CIMT) as an indicator of generalized atherosclerosis. Read More

View Article and Full-Text PDF

HIV-Infected Naïve Patients Exhibit Endothelial Dysfunction Concomitant with Decreased Natural Antibodies Against Defined Apolipoprotein B Autoantigens.

Arq Bras Cardiol 2021 Apr;116(4):844-849

Universidade Federal de São Paulo Escola Paulista de Medicina, São Paulo, SP - Brasil.

Backgorund: Traditional and HIV-defined risk factors may be associated with an increase in cardiovascular events. Recent studies have suggested that the humoral immune response to modified LDL may be associated with the process of atherosclerosis.

Objectives: To evaluate the presence of anti-oxLDL and apolipoprotein B-derived peptides in the blood, and their association with the endothelial function in HIV-infection. Read More

View Article and Full-Text PDF

Effects of Late Aerobic Exercise on Cardiac Remodeling of Rats with Small-Sized Myocardial Infarction.

Arq Bras Cardiol 2021 Apr;116(4):784-792

Faculdade de Medicina de Botucatu, Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Botucatu, SP - Brasil.

Background: Physical exercise has been considered an important non-pharmacological therapy for the prevention and treatment of cardiovascular diseases. However, its effects on minor cardiac remodeling are not clear.

Objective: To evaluate the influence of aerobic exercise on the functional capacity, cardiac structure, left ventricular (LV) function, and gene expression of NADPH oxidase subunits in rats with small-sized myocardial infarction (MI). Read More

View Article and Full-Text PDF

Carotid Artery Atherosclerotic Profile as Risk Predictor for Restenosis After Coronary Stenting.

Arq Bras Cardiol 2021 Apr;116(4):727-733

Universidade Estadual Paulista Julio de Mesquita Filho - Faculdade de Medicina Campus de Botucatu, Botucatu, SP - Brasil.

Background: The incidence of restenosis of the coronary artery after a bare-metal stent implant has been lower than in simple balloon angioplasty; however, it still shows relatively high rates.

Objective: The aim of this study was to find new risk indicators for in-stent restenosis using carotid ultrasonography, that, in addition to the already existing indicators, would help in decision-making for stent selection.

Methods: We carried out a cross-sectional prospective study including 121 consecutive patients with chronic coronary artery disease who had undergone percutaneous coronary intervention with repeat angiography in the previous 12 months. Read More

View Article and Full-Text PDF

Meibomian glands dropout in patients with inactive thyroid related orbitopathy.

PLoS One 2021 22;16(4):e0250617. Epub 2021 Apr 22.

Faculty of Medicine, Department of Ophthalmology, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand.

Purpose: To evaluate the structure and function of meibomian glands in patients with thyroid related orbitopathy (TRO) compared with age- and sex-matched controls without TRO.

Methods: This cross-sectional study included 106 eyes of 53 patients with TRO and 106 eyes of 53 age- and sex-matched controls without TRO. Patients with TRO were assessed for thyroid hormone status, activity and severity of TRO. Read More

View Article and Full-Text PDF

Ultrasonographic Technique, Appearance, and Diagnostic Accuracy for Common Shoulder Sports Injuries: A Narrative Review.

JBJS Rev 2021 Apr 22;9(4). Epub 2021 Apr 22.

The Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, Pennsylvania.

»: Ultrasonography (US) is valued for its availability, tolerability, low cost, and utility in real-time dynamic evaluation. Its use in diagnosing upper-extremity shoulder injury has expanded, but several features require definition before more widespread adoption can be realized.

»: In particular, the evaluation of rotator cuff tears (RCTs) with US has been extensively studied, and authors generally agree that US is comparable with magnetic resonance imaging for the detection of full-thickness RCTs, whereas partial-thickness RCTs are more difficult to accurately identify with US. Read More

View Article and Full-Text PDF

Influence of atorvastatin on metabolic pattern of rats with pulmonary hypertension.

Aging (Albany NY) 2021 Apr 22;13. Epub 2021 Apr 22.

Department of Geriatrics, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China.

Background: Metabonomics has been widely used to analyze the initiation, progress, and development of diseases. However, application of metabonomics to explore the mechanism of pulmonary arterial hypertension (PAH) are poorly reported. This study aimed to investigate the influence of atorvastatin (Ato) on metabolic pattern of rats with pulmonary hypertension. Read More

View Article and Full-Text PDF

Value of contrast-enhanced ultrasonography in assessing the activity of idiopathic retroperitoneal fibrosis: a prospective study.

Clin Exp Rheumatol 2021 Apr 15. Epub 2021 Apr 15.

Department of Rheumatology, The First Medical Center of PLA General Hospital, Beijing, China.

Objectives: We aimed to evaluate changes in the contrast-enhanced ultrasound (CEUS) parameters in patients with idiopathic retroperitoneal fibrosis (RPF) before and after treatment, and to analyse the value of CEUS to assess RPF activity.

Methods: We performed a prospective study that included patients with idiopathic RPF who were treated for RPF at our hospital from April 2016 to April 2019. All patients underwent CEUS examination and some of them underwent positron emission tomography/computed tomography (PET/CT) examination simultaneously. Read More

View Article and Full-Text PDF

Structural Phase-Dependent Giant Interfacial Spin Transparency in W/CoFeB Thin-Film Heterostructures.

ACS Appl Mater Interfaces 2021 Apr 22. Epub 2021 Apr 22.

Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector-III, Salt Lake, Kolkata 700 106, India.

Pure spin current has transformed the research field of conventional spintronics due to its various advantages, including energy efficiency. An efficient mechanism for generation of pure spin current is spin pumping, and high effective spin-mixing conductance () and interfacial spin transparency () are essential for its higher efficiency. By employing the time-resolved magneto-optical Kerr effect technique, we report here a giant value of in substrate/W ()/CoFeB ()/SiO (2 nm) thin-film heterostructures in the beta-tungsten (β-W) phase. Read More

View Article and Full-Text PDF

Use of Intra-uterine Injection of Platelet-rich Plasma (PRP) for Endometrial Receptivity and Thickness: a Literature Review of the Mechanisms of Action.

Reprod Sci 2021 Apr 22. Epub 2021 Apr 22.

Rejuvenating Fertility Center, New York, NY, USA.

Endometrial receptivity and thickness play an important role in achieving a pregnancy. Intrauterine autologous platelet-rich plasma (PRP) infusion has been used in infertile women with recurrent implantation failure (RIF) and thin endometrial lining thickness (EMT). Literature search was performed in PubMed for studies including in vitro, animal, and human studies as well as in abstracts presented at national conferences. Read More

View Article and Full-Text PDF

Long-term structural and functional outcomes of primary congenital glaucoma.

Graefes Arch Clin Exp Ophthalmol 2021 Apr 22. Epub 2021 Apr 22.

Department of Ophthalmology, National Taiwan University Hospital, No 7, Chung-Shan S. Rd., Taipei, 100, Taiwan.

Purpose: To investigate the clinical characteristics and long-term outcomes of primary congenital glaucoma (PCG) patients.

Methods: In this retrospective, longitudinal, cohort study, PCG patients with reliable visual field (VF) tests and optical coherence tomography (OCT) were included. Disease progression was detected using guided progression analysis with OCT and the change analysis of mean deviation (MD) slope with VF tests. Read More

View Article and Full-Text PDF

Comparison of artery-based methods for ordinal grading of coronary artery calcium on low-dose chest computed tomography.

Eur Radiol 2021 Apr 22. Epub 2021 Apr 22.

Department of Radiology, Severance Hospital, Research Institute of Radiological Science, Yonsei University College of Medicine, 50-1 Yonsei-Ro, Seodaemun-Gu, Seoul, 03722, Korea.

Objectives: To identify the optimal artery-based method for ordinal grading of coronary artery calcium (CAC) on non-electrocardiogram (ECG)-gated low-dose chest computed tomography (LDCT) among three methods.

Methods: A total of 120 asymptomatic subjects who underwent both LDCT and ECG-gated calcium scoring CT on the same day were retrospectively enrolled. Three cardiothoracic radiologists independently assessed CAC severity on LDCT (1. Read More

View Article and Full-Text PDF

Ultralow magnetostrictive flexible ferromagnetic nanowires.

Nanoscale 2021 Mar 19;13(12):6043-6052. Epub 2021 Mar 19.

Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden.

The integration of magneto-electric and spintronic sensors to flexible electronics presents a huge potential for advancing flexible and wearable technologies. Magnetic nanowires are core components for building such devices. Therefore, realizing flexible magnetic nanowires with engineered magneto-elastic properties is key to flexible spintronic circuits, as well as creating unique pathways to explore complex flexible spintronic, magnonic, and magneto-plasmonic devices. Read More

View Article and Full-Text PDF

Design and tailoring of two-dimensional Schottky, PN and tunnelling junctions for electronics and optoelectronics.

Nanoscale 2021 Apr 7;13(14):6713-6751. Epub 2021 Apr 7.

State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.

Owing to their superior carrier mobility, strong light-matter interactions, and flexibility at the atomically thin thickness, two-dimensional (2D) materials are attracting wide interest for application in electronic and optoelectronic devices, including rectifying diodes, transistors, memory, photodetectors, and light-emitting diodes. At the heart of these devices, Schottky, PN, and tunneling junctions are playing an essential role in defining device function. Intriguingly, the ultrathin thickness and unique van der Waals (vdW) interlayer coupling in 2D materials has rendered enormous opportunities for the design and tailoring of various 2D junctions, e. Read More

View Article and Full-Text PDF

Clinical and Radiographic Outcomes After Treatment of Patellar Chondral Defects: A Systematic Review.

Sports Health 2021 Apr 22:19417381211003515. Epub 2021 Apr 22.

Context: There is currently no evidence-based consensus on how to treat a full-thickness, symptomatic articular cartilage injury of the patella, although numerous treatment options are available.

Objective: To systematically evaluate the functional outcomes after operative treatment of patellar cartilage lesions. Our secondary purpose was to evaluate radiographic outcomes after treatment. Read More

View Article and Full-Text PDF

Efficacy of breast shielding during head computed tomography examination.

Radiol Oncol 2020 Aug 1;55(1):116-120. Epub 2020 Aug 1.

University of Ljubljana, Faculty of Health Sciences, Medical Imaging and Radiotherapy Department, Ljubljana, Slovenia.

Background: Female breasts are exposed to scattered radiation regardless of not being included in the primary field during head CT. This study aimed to investigate whether the use of lead shielding is beneficial in dose reduction to the breasts during head CT.

Patients And Methods: The study was performed in two different hospitals on two different CT units and included 120 patients. Read More

View Article and Full-Text PDF

Capillary-Force-Driven Self-Assembly of 4D-Printed Microstructures.

Adv Mater 2021 Apr 22:e2100332. Epub 2021 Apr 22.

State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering Southeast University, Nanjing, 210096, China.

Capillary-force-driven self-assembly is emerging as a significant approach for the massive manufacture of advanced materials with novel wetting, adhesion, optical, mechanical, or electrical properties. However, academic value and practical applications of the self-assembly are greatly restricted because traditional micropillar self-assembly is always unidirectional. In this work, two-photon-lithography-based 4D microprinting is introduced to realize the reversible and bidirectional self-assembly of microstructures. Read More

View Article and Full-Text PDF

No significant retinal damage induced by major orthopedic surgery - a pilot study.

Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2021 Apr 19. Epub 2021 Apr 19.

Department of Anesthesiology, Perioperative Medicine and Intensive Care, J.E. Purkinje University, Masaryk Hospital Usti nad Labem, Socialni pece 3316/12A, Usti nad Labem 400 11, Czech Republic.

Background: Perioperative visual loss is one of the rare but devastating complications of anesthesia and surgery. The incidence of less severe or even subclinical postoperative visual dysfunction is unknown. Therefore, we decided to perform a pilot prospective observational clinical study to evaluate whether structural changes of the retina can be detected in patients undergoing elective orthopaedic surgery by optical coherence tomography (OCT). Read More

View Article and Full-Text PDF

Retinal nerve fibre layer/ganglion cell-inner plexiform layer thickness ratio in patients with systemic hypertension.

Acta Ophthalmol 2021 Apr 21. Epub 2021 Apr 21.

Department of Ophthalmology, Chungnam National University College of Medicine, Daejeon, Korea.

Purpose: Acute and chronic hypertension may have different pathophysiological mechanisms in the retina. Here, we compared the retinal nerve fibre layer (RNFL)/ganglion cell-inner plexiform layer (GC-IPL) thickness ratios of patients with 'relieved' severe hypertensive retinopathy (relieved HTNR) and chronic hypertension without retinopathy (chronic HTN) to those of normal controls.

Methods: We performed cross-sectional study. Read More

View Article and Full-Text PDF

Evaluation of muscle thickness of the vastus lateralis by ultrasound imaging following blood flow restricted resistance exercise.

Clin Physiol Funct Imaging 2021 Apr 21. Epub 2021 Apr 21.

Department of Kinesiology, University of New Hampshire.

Blood flow restricted (BFR) exercise results in transient muscle growth that may be due to metabolite accumulation, hyperemia, and muscle damage, possibly serving as a stimulus for hypertrophy. Understanding the duration of this growth is important for exercise recovery and measurement of hypertrophy.

Purpose: To measure changes in muscle size via ultrasound throughout a 48-hour period after a session of BFR knee extension (KE) exercise. Read More

View Article and Full-Text PDF

Cardiovascular dysfunction risk in young adults with congenital adrenal hyperplasia due to 21-hydroxylase enzyme deficiency.

Int J Clin Pract 2021 Apr 21:e14233. Epub 2021 Apr 21.

Laboratory of Growth and Development (LabCreD) - Center for Investigation in Pediatrics (CIPED), School of Medical Sciences (FCM), State University of Campinas (UNICAMP), Campinas, SP, Brazil.

Background: The association of congenital adrenal hyperplasia (CAH), due to 21-hydroxylase enzyme (21OHase) deficiency, duration of treatment, and dosage, with cardiovascular dysfunction in young adults remains unclear. We aimed to evaluate myocardial function, vascular structures, and epicardial fat thickness in young adults with CAH due to 21OHase deficiency. Correlations between the duration and dose of glucocorticoid therapy and cardiovascular parameters were analyzed. Read More

View Article and Full-Text PDF

A plea for standardization of confocal microscopy and optical coherence tomography parameters to evaluate physiological and para-physiological skin conditions in cosmetic science.

Exp Dermatol 2021 Apr 21. Epub 2021 Apr 21.

Dermatology Unit, University of Modena and Reggio Emilia, Modena, Italy.

Background: Non-invasive Reflectance Confocal Microscopy (RCM) and Optical Coherence Tomography (OCT) have been extended to the dermo-cosmetic field, for skin pathophysiology understanding and therapeutics monitoring. However, standardized methodology and parameters to interpret structures and changes in these settings are still lacking.

Objective: to propose a validated standard methodology and a list of defined parameters for objective non-pathological skin assessments in the cosmetically sensitive cheekbone area of the face. Read More

View Article and Full-Text PDF

Maximum effect of the heterogeneity of tissue mineralization on the effective cortical bone elastic properties.

Biomech Model Mechanobiol 2021 Apr 21. Epub 2021 Apr 21.

Sorbonne Université, INSERM, CNRS, Laboratoire d'Imagerie Biomédicale, 75006, Paris, France.

The mineralization level is heterogeneous in cortical bone extracellular matrix as a consequence of remodeling. Models of the effective elastic properties at the millimeter scale have been developed based on idealizations of the vascular pore network and matrix properties. Some popular models do not take into account the heterogeneity of the matrix. Read More

View Article and Full-Text PDF

Cartilaginous bending spring for preventing tympanic membrane graft medialisation in anterior or subtotal tympanic membrane perforations-how I do it.

Eur Arch Otorhinolaryngol 2021 Apr 21. Epub 2021 Apr 21.

Department of Otorhinolaryngology, Head and Neck Surgery, Friedrich-Alexander University Erlangen-Nuremberg (FAU), Waldstrasse 1, 91054, Erlangen, Germany.

Background: The reconstruction of anterior or subtotal tympanic membrane perforations is critical due to the risk of anterior graft medialisation and retraction or recurrent perforation.

Method: After reconstruction of the tympanic membrane by means of grafting, a rectangular cartilage strut (length 6 mm, breadth 2 mm, thickness 0.1 mm) is prepared using a cartilage knife and scalpel. Read More

View Article and Full-Text PDF

SARS-CoV-2-related encephalitis with prominent parkinsonism: clinical and FDG-PET correlates in two patients.

J Neurol 2021 Apr 21. Epub 2021 Apr 21.

Clinical Neurology Unit, Santa Maria della Misericordia University Hospital, Piazzale Santa Maria della Misericordia, Udine, Italy.

Considering the similarities with other pandemics due to respiratory virus infections and subsequent development of neurological disorders (e.g. encephalitis lethargica after the 1918 influenza), there is growing concern about a possible new wave of neurological complications following the worldwide spread of SARS-CoV-2. Read More

View Article and Full-Text PDF

Comparison of Macular Choroidal Thickness and Volume between Pseudoexfoliative Glaucoma and Pseudoexfoliative Syndrome.

J Ophthalmol 2020 26;2020:8886398. Epub 2020 Nov 26.

Department of Ophthalmology, The Second Hospital of Hebei Medical University, Shijiazhuang 050000, Hebei, China.

Purpose: To evaluate the difference in macular choroidal thickness and volume between patients with pseudoexfoliative glaucoma (PXG), patients with pseudoexfoliative syndrome (PEX), and normal controls.

Methods: This case-control study included 49 PXG patients (group A), 33 PEX patients (group B), and 42 sex-, age-, and axial length-matched healthy volunteer eyes (group C). The macular choroidal thickness and volume of all subjects studied were measured by enhanced depth imaging optical coherence tomography. Read More

View Article and Full-Text PDF
November 2020