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Low intensity ultrasound

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https://www.readbyqxmd.com/read/28817509/high-intensity-exercise-enhances-conduit-artery-vascular-function-in-older-adults
#1
Erika Iwamoto, Josh M Bock, Darren P Casey
PURPOSE: Modulation of vascular function follows an exercise intensity-dependent pattern in young adults. This study aimed to investigate the potential intensity-dependent effects of an acute bout of exercise on conduit and resistance artery function in healthy older adults. METHODS: Eleven healthy older adults (5 males/6 females, 66±1 years) completed 30 minutes of recumbent cycling at 50-55% (low-intensity) and 75-80% (high-intensity) of their age-predicted maximal heart rate on two separate study visits...
August 16, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28816901/in-patients-with-a-tibial-fracture-low-intensity-pulsed-ultrasound-after-intramedullary-nail-fixation-did-not-accelerate-radiographic-healing-or-improve-functional-recovery
#2
Matthew R Garner
No abstract text is available yet for this article.
August 16, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28815444/gladius-and-its-derivatives-as-potential-biosorbents-for-marine-diesel-oil
#3
Mayra F Preto, Sérgio P Campana-Filho, Anderson Fiamingo, Ivana C Cosentino, Maria C Tessari-Zampieri, Denis M S Abessa, Ágata F Romero, Isabella C Bordon
The demand for low cost and effective materials to remove contaminants such as residues of oil spills has encouraged studies on new biosorbents produced from wastes. Considering the overgeneration of fishing residues and the necessity to provide an alternative purpose for such materials, this study aimed to evaluate squid gladius and its derivatives (β-chitin and chitosan) as sorbents to remove marine diesel oil (MDO) from fresh and artificial seawater. It was also executed an attempted to improve their performances through a high-intensity ultrasound treatment (UT-gladius and UT-β-chitin)...
August 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28812002/image-guided-thermal-ablation-with-mr-based-thermometry
#4
REVIEW
Mingming Zhu, Ziqi Sun, Chin K Ng
Thermal ablation techniques such as radiofrequency, microwave, high intensity focused ultrasound (HIFU) and laser have been used as minimally invasive strategies for the treatment of variety of cancers. MR thermometry methods are readily available for monitoring thermal distribution and deposition in real time, leading to decrease of incidents of normal tissue damage around targeted lesion. HIFU and laser-induced thermal therapy (LITT) are the two widely accepted tumor ablation techniques because of their compatibility with MR systems...
June 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28808900/varying-ultrasound-power-level-to-distinguish-surgical-instruments-and-tissue
#5
Hongliang Ren, Banani Anuraj, Pierre E Dupont
We investigate a new framework of surgical instrument detection based on power-varying ultrasound images with simple and efficient pixel-wise intensity processing. Without using complicated feature extraction methods, we identified the instrument with an estimated optimal power level and by comparing pixel values of varying transducer power level images. The proposed framework exploits the physics of ultrasound imaging system by varying the transducer power level to effectively distinguish metallic surgical instruments from tissue...
August 15, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28807447/role-of-reactive-oxygen-species-during-low-intensity-pulsed-ultrasound-application-in-mc-3-t3-e1-pre-osteoblast-cell-culture
#6
Harmanpreet Kaur, Arno G Siraki, Hasan Uludağ, Douglas N Dederich, Patrick Flood, Tarek El-Bialy
We evaluated the activation of mitogen-activated protein kinase (MAPK) activation through reactive oxygen species (ROS) by application of low-intensity ultrasound (LIPUS) to MC-3 T3 E1 pre-osteoblasts. The cells were subjected to one LIPUS application for either 10 or 20 min, and the control group was exposed to a sham transducer. For ROS inhibition, 10 μM diphenylene iodonium (DPI) was added to the cells an hour before LIPUS application. Samples were collected 1, 3, 6, 12 and 24 h after LIPUS application, and cells were evaluated for ROS generation, cell viability, gene expression and MAPK activation by immunoblot analyses...
August 11, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28804549/treatment-effect-of-low-intensity-pulsed-ultrasound-on-leukopenia-induced-by-cyclophosphamide-in-rabbits
#7
Baoru Liu, Yueping Luo, Dong Luo, Weichen Zhou, Yu Zhang, Ruixin He, Junshu Li, Yong Wang, Yan Wang, Wenzhi Chen
OBJECTIVE: This study aims to examine the effects of low intensity pulsed ultrasound (LIPUS) on leukopenia induced by cyclophosphamide in a rabbit model. METHODS: The leukopenia model in New Zealand rabbit was established by injecting cyclophosphamide into the ear vein. Forty leukopenia model rabbits were randomly allocated to control group (n = 20) and LIPUS group (n = 20). LIPUS group underwent 20 minutes of daily ultrasound treatment at femoral metaphysis for 7 days while control group received sham treatment...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28803228/utility-of-routine-urine-cmv-pcr-and-total-serum-igm-testing-of-small-for-gestational-age-infants-a-single-center-review
#8
Michael M Espiritu, Sean Bailey, Elena V Wachtel, Pradeep V Mally
BACKGROUND: Due to the extremely low incidence of TORCH (toxoplasmosis, rubella, CMV, herpes simplex virus) infections, diagnostic testing of all small for gestational age (SGA) infants aimed at TORCH etiologies may incur unnecessary tests and cost. OBJECTIVE: To determine the frequency of urine CMV PCR and total IgM testing among infants with birth weight <10% and the rate of test positivity. To evaluate the frequency of alternative etiologies of SGA in tested infants...
August 14, 2017: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/28799370/nucleation-in-food-colloids
#9
Malcolm J W Povey
Nucleation in food colloids has been studied in detail using ultrasound spectroscopy. Our data show that classical nucleation theory (CNT) remains a sound basis from which to understand nucleation in food colloids and analogous model systems using n-alkanes. Various interpretations and modifications of CNT are discussed with regard to their relevance to food colloids. Much of the evidence presented is based on the ultrasound velocity spectrometry measurements which has many advantages for the study of nucleating systems compared to light scattering and NMR due to its sensitivity at low solid contents and its ability to measure true solid contents in the nucleation and early crystal growth stages...
December 7, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28796487/endogenous-catalytic-generation-of-o2-bubbles-for-in-situ-ultrasound-guided-high-intensity-focused-ultrasound-ablation
#10
Tianzhi Liu, Nan Zhang, Zhigang Wang, Meiying Wu, Yu Chen, Ming Ma, Hangrong Chen, Jianlin Shi
High intensity focused ultrasound (HIFU) surgery generally suffers from poor precision and low efficiency in clinical application, especially for cancer therapy. Herein, a multiscale hybrid catalytic nanoreactor (catalase@MONs, abbreviated as C@M) has been developed as a tumor-sensitive contrast and synergistic agent (C&SA) for ultrasound-guided HIFU cancer surgery, by integrating dendritic-structured mesoporous organosilica nanoparticles (MONs) and catalase immobilized in the large open pore channels of MONs...
August 16, 2017: ACS Nano
https://www.readbyqxmd.com/read/28794625/paclitaxel-loaded-and-a10-3-2-aptamer-targeted-poly-lactide-co-glycolic-acid-nanobubbles-for-ultrasound-imaging-and-therapy-of-prostate-cancer
#11
Meng Wu, Ying Wang, Yiru Wang, Mingbo Zhang, Yukun Luo, Jie Tang, Zhigang Wang, Dong Wang, Lan Hao, Zhibiao Wang
In the current study, we synthesized prostate cancer-targeting poly(lactide-co-glycolic acid) (PLGA) nanobubbles (NBs) modified using A10-3.2 aptamers targeted to prostate-specific membrane antigen (PSMA) and encapsulated paclitaxel (PTX). We also investigated their impact on ultrasound (US) imaging and therapy of prostate cancer. PTX-A10-3.2-PLGA NBs were developed using water-in-oil-in-water (water/oil/water) double emulsion and carbodiimide chemistry approaches. Fluorescence imaging together with flow cytometry verified that the PTX-A10-3...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28789857/transcranial-ultrasonic-stimulation-modulates-single-neuron-discharge-in-macaques-performing-an-antisaccade-task
#12
Nicolas Wattiez, Charlotte Constans, Thomas Deffieux, Pierre M Daye, Mickael Tanter, Jean-François Aubry, Pierre Pouget
BACKGROUND: Low intensity transcranial ultrasonic stimulation (TUS) has been demonstrated to non-invasively and transiently stimulate the nervous system. Although US neuromodulation has appeared robust in rodent studies, the effects of US in large mammals and humans have been modest at best. In addition, there is a lack of direct recordings from the stimulated neurons in response to US. Our study investigates the magnitude of the US effects on neuronal discharge in awake behaving monkeys and thus fills the void on both fronts...
July 26, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28777457/a-novel-low-cost-ultrasound-guided-pericardiocentesis-simulation-model-demonstration-of-feasibility
#13
Ashley Sullivan, Lyudmila Khait, Mark Favot
Pericardiocentesis is a rare life-saving procedure for patients with cardiac tamponade. Due to the infrequency of this procedure, simulation models are often used for training. Commercial models are generally expensive. Proposed homemade models offer a lower-cost alternative but can be labor and time intensive. The purpose of this study was to determine the feasibility of a limited use, low-cost ultrasound-guided pericardiocentesis model as a training tool for emergency physicians. Our model proved to be a practical, easily implemented, and acceptable model for training emergency physicians, including residents and students, in ultrasound-guided pericardiocentesis...
August 4, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28776612/overcoming-t-gondii-infection-and-intracellular-protein-nanocapsules-as-biomaterials-for-ultrasonically-controlled-drug-release
#14
REVIEW
M S Aw, L Paniwnyk
One of the pivotal matters of concern in intracellular drug delivery is the preparation of biomaterials containing drugs that are compatible with the host target. Nanocapsules for oral delivery are found to be suitable candidates for targeting Toxoplasma gondii (T. gondii), a maneuvering and smart protozoic parasite found across Europe and America that causes a subtle but deadly infection. To overcome this disease, there is much potential of integrating protein-based cells into bioinspired nanocompartments such as via biodegradable cross-linked disulfide polyelectrolyte nanoparticles...
August 4, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28763448/frequency-sensitive-mechanism-in-low-intensity-ultrasound-enhanced-bioeffects
#15
April D Miller, Abdoulkadri Chama, Tobias M Louw, Anuradha Subramanian, Hendrik J Viljoen
This study presents two novel theoretical models to elucidate frequency sensitive nuclear mechanisms in low-intensity ultrasound enhanced bioeffects. In contrast to the typical 1.5 MHz pulsed ultrasound regime, our group previously experimentally confirmed that ultrasound stimulation of anchored chondrocytes at resonant frequency maximized gene expression of load inducible genes which are regulatory markers for cellular response to external stimuli. However, ERK phosphorylation displayed no frequency dependency, suggesting that the biochemical mechanisms involved in enhanced gene expression is downstream of ERK phosphorylation...
2017: PloS One
https://www.readbyqxmd.com/read/28763326/point-of-care-ultrasonography-findings-and-care-use-among-patients-undergoing-ultrasound-guided-shoulder-injections
#16
Se Won Lee, Timothy Tiu, Jeremy Roberts, Brian Lee, Matthew N Bartels, Mooyeon Oh-Park
OBJECTIVE: The aims of the study were to assess the overall reduction of pain in patients undergoing ultrasound-guided shoulder injections and to characterize the preinjection point-of-care ultrasound findings and use of clinical services postinjection including the use of magnetic resonance imaging and surgeries. DESIGN: Data of 172 patients who underwent ultrasound-guided subacromial subdeltoid injection or glenohumeral joint injection were reviewed for preinjection point-of-care ultrasound findings, change in pain intensity at 2 mos from baseline, and use of care at 6 mos' postinjection...
August 1, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28762588/an-investigation-of-shock-wave-therapy-and-low-intensity-pulsed-ultrasound-on-fracture-healing-under-reduced-loading-conditions-in-an-ovine-model
#17
Benjamin C Gadomski, Kirk C McGilvray, Jeremiah T Easley, Ross H Palmer, Jian Jiao, Xiaofei Li, Yi-Xian Qin, Christian M Puttlitz
The use of shock wave therapy (SWT) and low-intensity pulsed ultrasound (LIPUS) as countermeasures to the inhibited fracture healing experienced during mechanical unloading was investigated by administering treatment to the fracture sites of mature, female, Rambouillet Columbian ewes exposed to partial mechanical unloading or full gravitational loading. The amount of fracture healing experienced by the treatment groups was compared to controls in which identical surgical and testing protocols were administered except for SWT or LIPUS treatment...
August 1, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28754853/dna-repair-deregulation-in-discrete-prostate-cancer-lesions-identified-on-multi-parametric-mri-and-targeted-by-mri-ultrasound-fusion-guided-biopsy
#18
Caleb R Dulaney, Soroush Rais-Bahrami, Debra Della Manna, Jennifer B Gordetsky, Jeffrey W Nix, Eddy S Yang
Prostate cancer is histologically and molecularly heterogeneous. Clinically significant disease is often driven by dominant intra-prostatic lesions (IPLs). Prostate cancers cluster into molecular phenotypes with substantial genetic heterogeneity making pathway-based molecular analysis appealing. MRI/ultrasound fusion biopsy provides a unique opportunity to characterize tumor biology of discrete lesions at diagnosis. This study determined the feasibility of pathway-based gene expression analysis of prostate biopsies and characterized cancer pathway deregulation...
July 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28754573/enhanced-microbubbles-assisted-cleaning-of-diesel-contaminated-sand
#19
Ashutosh Agarwal, Yu Liu
In this article, we investigated the effect of low intensity pulsed ultrasound (US), temperature and salinity on cleaning efficacy of fine bubbles with diameter <50μm for diesel contaminated sands. About 47% and 76% diesel removal was achieved from 10% (w/w) diesel contaminated fine and medium sands respectively, after 30min treatment with 40kHz low intensity intermittent pulsed US together with MBs in contrast to 41% and 68% diesel removal while treatment with MBs alone. The effect of high temperature was found to be prominent during the initial stages of cleaning...
July 25, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28754497/ultrasonography-improves-glycemic-control-by-detecting-insulin-derived-localized-amyloidosis
#20
Minoru Kikuchi, Naoki Hirokawa, Seiya Hagiwara, Hidetaka Nakayama, Shinji Taneda, Naoki Manda, Kouichi Sakata
We examined the feasibility of ultrasound diagnosis of insulin-derived localized amyloidosis (IDLA). In addition to ultrasound detectability and findings, the insulin absorption rate, insulin dosage and hemoglobin A1c (HbA1c) levels before and after shifting the insulin injection site were investigated for 22 cases of IDLA. The detectability of IDLA on ultrasound was 100%; 59.1% was palpable lumps and 40.9% was not palpable. The palpable type had lower echo intensity and were harder than the non-palpable type...
July 25, 2017: Ultrasound in Medicine & Biology
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