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Ultrasound and muscle

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https://www.readbyqxmd.com/read/28633832/effects-of-ultrasound-on-the-beef-structure-and-water-distribution-during-curing-through-protein-degradation-and-modification
#1
Da-Cheng Kang, Xue-Qin Gao, Qing-Feng Ge, Guang-Hong Zhou, Wan-Gang Zhang
The objective of this study was to explore the mechanisms of power ultrasound (PUS, 150 and 300W) and treatment time (30 and 120min) on the water-holding capacity (WHC) and tenderness of beef during curing. Beef muscle at 48h post mortem was subjected to PUS treatment at a frequency of 20kHz. Analysis of compression loss and shear force showed that PUS-assisted curing significantly increased the WHC and the tenderness of beef compared to static brining (p<0.05). According to the analysis of LF-NMR, PUS treatment could increase the P21 values which indicated an improvement in water-binding ability of beef muscle...
September 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28633669/impact-of-exercise-programs-among-helicopter-pilots-with-transient-lbp
#2
Knut Andersen, Roald Baardsen, Ingvild Dalen, Jan Petter Larsen
BACKGROUND: Flight related low back pain (LBP) among helicopter pilots is frequent and may influence flight performance. Prolonged confined sitting during flights seems to weaken lumbar trunk (LT) muscles with associated secondary transient pain. Aim of the study was to investigate if structured training could improve muscular function and thus improve LBP related to flying. METHODS: 39 helicopter pilots (35 men and 4 women), who reported flying related LBP on at least 1 of 3 missions last month, were allocated to two training programs over a 3-month period...
June 20, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28632661/efficacy-and-limitations-of-conservative-treatment-for-painful-patella-partita-positioning-of-an-ultrasound-accelerated-fracture-healing-apparatus
#3
Natsuki Sugimura, Daisuke Hirose, Koji Aso, Masashi Izumi, Yusuke Okanoue, Kazuo Kitaoka, Masahiko Ikeuchi
OBJECTIVE: Generally, painful patella partita is conservatively treated, but the usefulness of a low-intensity pulsed ultrasound (LIPUS) healing apparatus is unclear. The objective of this study was to investigate the usefulness of LIPUS for conservative treatment of painful patella partita. SUBJECTS AND METHODS: The subjects included 17 patients diagnosed with painful patella partita. The subjects were divided into 2 groups: those without pain at 6 months (responsive group) and those with pain that persisted for 6 months or longer (non-responsive group)...
July 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28632507/tibialis-posterior-tenosynovitis-a-unique-musculoskeletal-manifestation-of-gout
#4
Peter Shupper, Todd P Stitik
Extra-articular manifestations of gout can present in several ways, including tenosynovitis. We present a rare case of acute tibialis posterior gouty tenosynovitis. An 82-year-old man with a history of well-controlled gout presented with acute onset of left ankle pain, occurring without inciting event. The medial ankle was slightly erythematous with moderate dorsal-medial swelling and mild dorsal-lateral swelling, with severe tenderness to palpation over the medial retro-malleolar region. Range of motion and manual muscle testing were pain limited throughout...
June 20, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28630219/a-rare-case-of-sigmoid-colon-perforation-with-subsequent-psoas-abscess-collection-with-extensive-involvement-of-the-sartorius-muscle
#5
Ali Wadood, Abdulrahman Odeh, Khizer Rana, Shafquat Zaman
A middle-aged man was admitted with worsening hip pain, fevers and reduced mobility. These symptoms were preceded by a mechanical fall but despite regular analgesia, symptoms did not resolve. His prior medical history included ischaemic heart disease, hypertension and hypercholesterolaemia. A trauma and orthopaedic review revealed a painful left hip with reduced range of motion. In addition, some mild tenderness in the left iliac fossa was noted. Blood tests revealed markedly raised inflammatory markers. Plain radiographs and ultrasound were normal...
June 19, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28629806/prevalence-of-bleeding-complications-following-ultrasound-guided-botulinum-toxin-injections-in-patiens-on-anticoagulation-or-antiplatelet-therapy
#6
Jeffrey Lavallee, Regan Royer, Geoffrey Smith
BACKGROUND: Patients on anticoagulation or antiplatelet therapy may be at higher risk of bleeding complications following intramuscular chemodenervation injections. Musculoskeletal ultrasound may be able to reduce the risk of bleeding complications by providing real time visualization of vascular structures and post-injection monitoring. Limited data exist addressing risk of bleeding complications following ultrasound-guided botulinum neurotoxin intramuscular chemodenervation procedures in the setting of anticoagulation or antiplatelet therapy...
June 16, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28625661/resting-limb-muscle-perfusion-during-inspiratory-muscle-loading-in-hypoxia-and-normoxia
#7
Hannes Klenze, Thomas Christian Köhler, Franziska Farquharson, Stephan Walterspacher, Daniel Duerschmied, Kai Roecker, Hans-Joachim Kabitz, David Johannes Walker
INTRODUCTION: Fatiguing of respiratory muscles reduces peripheral muscle perfusion. Further, acute hypoxia enhances respiratory muscle fatigue. This study investigated the effects of inspiratory muscle loading (IML) on resting locomotor muscle perfusion in hypoxia compared to normoxia. METHODS: Ten subjects completed two study days of fatiguing IML (blinded, randomized) in normobaric hypoxia (targeted oxygen saturation 80%) and normoxia, respectively. Contrast-enhanced ultrasound (CEUS) of the gastrocnemius muscle and popliteal doppler ultrasonography were used to monitor muscle perfusion...
June 15, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28625071/adult-gastric-duplication-an-unknown-condition-within-the-spectrum-of-gastric-submucosal-lesions
#8
Yurena Caballero Díaz, Macarena Centeno Haro, Ángel Turégano García, Juan Ramón Hernández Hernández
Gastric duplication is an uncommon condition in adults representing only 4-8% of all gastrointestinal duplications. It develops as a cystic growth within the thick gastric wall that is surrounded by a layer of smooth muscle and lined with gastric mucosa. It is usually asymptomatic but may present with nonspecific abdominal symptoms as well as cyst-related complications such as gastrointestinal (GI) bleeding, ulceration and even pancreatitis. They are difficult to distinguish from other gastric submucosal lesions and may also mimic a gastrointestinal tumor (GIST) or mucinous cyst of the pancreas...
June 19, 2017: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/28624916/interethnic-variation-in-pelvic-floor-morphology-in-women-with-symptomatic-pelvic-organ-prolapse
#9
Zeelha Abdool, Hans Peter Dietz, Barend Gerhardus Lindeque
INTRODUCTION AND HYPOTHESIS: There is a lack of epidemiological studies evaluating female pelvic organ prolapse in developing countries. Current studies have largely focused on women of white ethnicity. This study was designed to determine interethnic variation in pelvic floor functional anatomy, namely, levator hiatal distensibility and pelvic organ descent, in women with symptomatic pelvic organ prolapse in a multi-ethnic South African population. METHODS: This prospective observational study included 258 consecutive women referred for pelvic organ prolapse assessment and management at a tertiary urogynaecological clinic...
June 17, 2017: International Urogynecology Journal
https://www.readbyqxmd.com/read/28624852/vasoconstrictor-responsiveness-in-contracting-human-muscle-influence-of-contraction-frequency-contractile-work-and-metabolic-rate
#10
Nicholas T Kruse, William E Hughes, Kenichi Ueda, Darren P Casey
PURPOSE: The aim of this study was to examine whether independent effects exist between contractile work and metabolic demand (VO2m) on vasoconstrictor responsiveness (i.e., functional sympatholysis) under different contraction durations matched for total contractile work in exercising human skeletal muscle. METHODS: Ten young men performed rhythmic forearm contractions at 10 and 15% of maximum voluntary contraction (MVC) which consisted of muscle contractions using the same duty cycle but altering the duration of the contraction-relaxation cycles of exercise and included: 1) fast frequency contractions at 10% MVC (FFC10%) using a contraction relaxation cycle at 1:2 s; 2) slow frequency contractions at 10% MVC (SFC10%) at 2:4 s; and 3) SFC at 15% MVC (SFC15%) at 2:4 s...
June 17, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28622670/adaptive-clutter-demodulation-for-non-contrast-ultrasound-perfusion-imaging
#11
Jaime Tierney, Crystal Coolbaugh, Theodore Towse, Brett Byram
Conventional Doppler ultrasound is useful for visualizing fast blood flow in large resolvable vessels. However, frame rate and tissue clutter caused by movement of the patient or sonographer make visualizing slow flow with ultrasound difficult. Patient and sonographer motion causes spectral broadening of the clutter signal, which limits ultrasound's sensitivity to velocities greater than 5-10mm/s for typical clinical imaging frequencies. To address this, we propose a clutter filtering technique that may increase the sensitivity of Doppler measurements to at least as low as 0...
June 13, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28620941/endothelial-mechanotransduction-proteins-and-vascular-function-are-altered-by-dietary-sucrose-supplementation-in-healthy-young-male-subjects
#12
Lasse Gliemann, Nicolai Rytter, Mads Lindskrog, Martina H Lundberg Slingsby, Thorbjörn Åkerström, Lykke Sylow, Erik A Richter, Ylva Hellsten
Endothelial mechanotransduction is important for vascular function but alterations and activation of vascular mechanosensory proteins have not been investigated in humans. In endothelial cell culture, simple sugars effectively impair mechanosensor proteins. To study mechanosensor- and vascular function in humans, twelve young healthy male subjects supplemented their diet with 3 × 75 g sucrose day(-1) for 14 days in a randomized cross-over design. Before and after the intervention period, the hyperemic response to passive lower leg movement and active knee extensor exercise was determined by ultrasound doppler...
June 15, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28620795/levator-ani-defects-and-the-severity-of-symptoms-in-women-with-anterior-compartment-pelvic-organ-prolapse
#13
Sissel H Oversand, Anne C Staff, Leiv Sandvik, Ingrid Volløyhaug, Rune Svenningsen
INTRODUCTION AND HYPOTHESIS: The aims of this study were to evaluate the prevalence of levator ani muscle (LAM) avulsions in a selected cohort of patients with primary anterior compartment pelvic organ prolapse (POP) and to assess whether LAM avulsions, as an independent factor, affect the degree of POP symptoms and sexual dysfunction. Additionally, clinical and demographic variables of women with and those without avulsions were compared. METHODS: We carried out a cross-sectional analysis of a prospective cohort study including 197 women scheduled for anterior compartment POP surgery...
June 15, 2017: International Urogynecology Journal
https://www.readbyqxmd.com/read/28620160/small-diameter-hybrid-vascular-grafts-composed-of-polycaprolactone-and-polydioxanone-fibers
#14
Yiwa Pan, Xin Zhou, Yongzhen Wei, Qiuying Zhang, Ting Wang, Meifeng Zhu, Wen Li, Rui Huang, Ruming Liu, Jingrui Chen, Guanwei Fan, Kai Wang, Deling Kong, Qiang Zhao
Electrospun polycaprolactone (PCL) vascular grafts showed good mechanical properties and patency. However, the slow degradation of PCL limited vascular regeneration in the graft. Polydioxanone (PDS) is a biodegradable polymer with high mechanical strength and moderate degradation rate in vivo. In this study, a small-diameter hybrid vascular graft was prepared by co-electrospinning PCL and PDS fibers. The incorporation of PDS improves mechanical properties, hydrophilicity of the hybrid grafts compared to PCL grafts...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28618294/focused-high-resolution-sonography-of-the-suprascapular-nerve-a-simple-surrogate-marker-for-neuralgic-amyotrophy
#15
Leonhard Gruber, Alexander Loizides, Wolfgang Löscher, Bernhard Glodny, Hannes Gruber
OBJECTIVES: To define the diagnostic value of high-resolution ultrasound (HRUS) of the suprascapular nerve (SSN) in the diagnosis of neuralgic amyotrophy (NA). METHODS: The cross-section areas (CSA) of the SSN at the C5 root (CSA1) and the omohyoid muscle in the midclavicular line (CSA2) were assessed bilaterally in 15 healthy volunteers and 14 patients with clinically and electrophysiologically verified NA. Receiver-operator-characteristics (ROC) curves were generated and cut-off values, sensitivity, specificity, positive (PPV) and negative predictive values (NPV), likelihood (LR) and odds ratios (OR) were calculated...
May 19, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28618093/influence-of-gender-bmi-and-body-shape-on-theoretical-injection-outcome-at-the-ventrogluteal-and-dorsogluteal-sites
#16
Theresa A Larkin, Elfriede Ashcroft, Blake A Hickey, Asmahan Elgellaie
AIMS AND OBJECTIVES: This study aimed to determine the influences of gender, BMI and observed body shape (OBS) on subcutaneous fat and muscle thicknesses, and theoretical injection outcome, at the ventrogluteal and dorsogluteal intramuscular injection sites. BACKGROUND: Debate continues as to whether the dorsogluteal or ventrogluteal injection site is more reliable for a successful intramuscular injection outcome. Subcutaneous fat and muscle thicknesses at the injection site are direct determinants of intramuscular injection outcome...
June 15, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/28617061/cancer-related-fatigue-and-muscle-quality-in-hodgkin-s-lymphoma-survivors
#17
Filipe Dinato de Lima, Martim Bottaro, Ritielli de Oliveira Valeriano, Lorena Cruz, Claudio L Battaglini, Carlos Alexandre Vieira, Ricardo Jacó de Oliveira
The purpose of this study was to compare fatigue, strength, body composition, muscle thickness, and muscle quality between Hodgkin's lymphoma survivors (HLS) and apparently healthy subjects matched by age, gender, and physical activity levels (CON). Twelve HLS (32.16 ± 8.06) and 36 CON (32.42 ± 7.64) were enrolled in the study. Fatigue was assessed using the 20-item Multidimensional Fatigue Inventory, muscle strength using an isokinetic dynamometer, body composition using dual-energy X-ray absorptiometry, and thickness and muscle quality using B-mode ultrasound...
June 1, 2017: Integrative Cancer Therapies
https://www.readbyqxmd.com/read/28616236/effect-of-applied-energy-in-renal-sympathetic-denervation-with-magnetic-resonance-guided-focused-ultrasound-in-a-porcine-model
#18
Jill Shea, Joshua de Bever, Eugene Kholmovski, Hannah Beal, J Rock Hadley, Emilee Minalga, Mohamed E Salama, Nassir F Marrouche, Allison Payne
BACKGROUND: Past catheter-based and focused ultrasound renal denervation studies have indicated that procedure efficacy is related to the number of ablations performed or the amount of energy used for the ablation. This study extends those prior results and investigates energy level effects on the efficacy of MR guided focused ultrasound renal denervation performed in a porcine model. METHODS: Twenty-four normotensive pigs underwent unilateral denervation at three intensity levels...
2017: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/28615966/acute-physiological-and-electrical-accentuation-of-vagal-tone-has-no-effect-on-pain-or-gastrointestinal-motility-in-chronic-pancreatitis
#19
Jacob Juel, Christina Brock, Søren S Olesen, Adnan Madzak, Adam D Farmer, Qasim Aziz, Jens B Frøkjær, Asbjørn Mohr Drewes
BACKGROUND: The effective management of pain in chronic pancreatitis (CP) remains a therapeutic challenge. Analgesic drugs, such as opioids, and the underlying pathology can impair gut function. The autonomic nervous system influences hormone secretion and gut motility. In healthy volunteers, electrical (using noninvasive transcutaneous vagal nerve stimulation [t-VNS]) and physiological (using deep slow breathing [DSB]) modulation of parasympathetic tone results in pain attenuation and enhanced gut motility...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28613097/dynamic-muscle-ultrasound-identifies-upper-motor-neuron-involvement-in-amyotrophic-lateral-sclerosis
#20
Yu-Ichi Noto, Neil Simon, Kazumoto Shibuya, José M Matamala, Thanuja Dharmadasa, Matthew C Kiernan
OBJECTIVE: The aim of the present study was to elucidate the pattern of change in bulbar muscles using ultrasound in patients diagnosed with amyotrophic lateral sclerosis (ALS). METHODS: Changes in the mylohyoid and geniohyoid muscle complex (mylohyoid-geniohyoid-muscle-complex) thickness were recorded while swallowing 5 ml of water using M-mode ultrasound in 30 ALS patients compared to 20 healthy controls. The ratio of mylohyoid-geniohyoid-muscle-complex thickness as determined by the maximum thickness of mylohyoid-geniohyoid-muscle-complex during swallowing divided by thickness at rest, was compared between ALS patients and controls, with the correlation between thickness ratio, echogenicity and clinical parameters assessed...
February 10, 2017: Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration
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