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'Therapeutic ultrasound'

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https://www.readbyqxmd.com/read/28504325/therapeutic-ultrasound-for-venous-leg-ulcers
#1
REVIEW
Nicky Cullum, Zhenmi Liu
BACKGROUND: Venous leg ulcers are a type of chronic, recurring, complex wound that is more common in people aged over 65 years. Venous ulcers pose a significant burden to patients and healthcare systems. While compression therapy (such as bandages or stockings) is an effective first-line treatment, ultrasound may have a role to play in healing venous ulcers. OBJECTIVES: To determine whether venous leg ulcers treated with ultrasound heal more quickly than those not treated with ultrasound...
May 15, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28504278/high-frequency-linear-rheology-of-hydrogels-probed-by-ultrasound-driven-microbubble-dynamics
#2
Akaki Jamburidze, Marco De Corato, Axel Huerre, Angelo Pommella, Valeria Garbin
Ultrasound-driven microbubble dynamics are central to biomedical applications, from diagnostic imaging to drug delivery and therapy. In therapeutic applications, the bubbles are typically embedded in tissue, and their dynamics are strongly affected by the viscoelastic properties of the soft solid medium. While the behaviour of bubbles in Newtonian fluids is well characterised, a fundamental understanding of the effect on ultrasound-driven bubble dynamics of a soft viscoelastic medium is still being developed...
May 15, 2017: Soft Matter
https://www.readbyqxmd.com/read/28469805/therapeutic-ultrasound-protects-huvecs-from-ischemia-hypoxia-induced-apoptosis-via-the-pi3k-akt-pathway
#3
Jing-Juan Huang, Yi-Qin Shi, Rui-Lin Li, An Hu, Zhao-Yang Lu, Liang Weng, Yi-Peng Han, Shen-Qi Wang, Lan Zhang, Chang-Ning Hao, Jun-Li Duan
Background: Previous studies have demonstrated that therapeutic ultrasound (TUS) ameliorates angiogenesis on ischemic hind limb animals and also promotes human umbilical vein endothelial cells (HUVECs) tube formation. Apoptosis plays a key role in post-ischemic angiogenesis pathogenesis. However, the mechanisms underlying the anti-apoptotic effects of TUS are not clear. Therefore we put forward the hypothesis that TUS might promote angiogenesis during ischemia/hypoxia (I/H) by decreasing apoptosis. Methods: We investigated the cytoprotective role of TUS and the underlying mechanisms in I/H-induced HUVEC apoptosis...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28464662/shock-formation-and-nonlinear-saturation-effects-in-the-ultrasound-field-of-a-diagnostic-curvilinear-probe
#4
Maria M Karzova, Petr V Yuldashev, Oleg A Sapozhnikov, Vera A Khokhlova, Bryan W Cunitz, Wayne Kreider, Michael R Bailey
Newer imaging and therapeutic ultrasound technologies may benefit from in situ pressure levels higher than conventional diagnostic ultrasound. One example is the recently developed use of ultrasonic radiation force to move kidney stones and residual fragments out of the urinary collecting system. A commercial diagnostic 2.3 MHz C5-2 array probe has been used to deliver the acoustic pushing pulses. The probe is a curvilinear array comprising 128 elements equally spaced along a convex cylindrical surface. The effectiveness of the treatment can be increased by using higher transducer output to provide a stronger pushing force; however nonlinear acoustic saturation can be a limiting factor...
April 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28448428/therapeutic-ultrasound-in-navicular-stress-injuries-in-elite-track-and-field-athletes
#5
Nikolaos Malliaropoulos, Dimosthenis Alaseirlis, George Konstantinidis, Agapi Papalada, Ioannis Tsifountoudis, Kosmas Petras, Nicola Maffulli
OBJECTIVE: To ascertain whether therapeutic ultrasound (TUS) can be used to assess the progression of conservative management in navicular stress injuries. DESIGN: This is a prospective, clinical case series. Level of evidence IV. SETTING: All participants were examined and followed up in a private Sports Injury Clinic. PARTICIPANTS: Ten elite track and field athletes with severe dorsal midfoot pain over the navicular bone participated in this study...
May 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28433438/analgesic-effects-of-transcutaneous-ultrasound-nerve-stimulation-in-a-rat-model-of-oxaliplatin-induced-mechanical-hyperalgesia-and-cold-allodynia
#6
Yueh-Ling Hsieh, Han-Yu Chen, Ching-Hsiang Yang, Chen-Chia Yang
This study investigated the effects and underlying mechanisms of therapeutic ultrasound (TUS) in a rat model of oxaliplatin-induced peripheral neuropathy. Animals received a total of eight injections with oxaliplatin (4 mg/kg), administered at 3-d intervals. TUS intervention (1 MHz, 0.5 W/cm(2)) started on the fifth oxaliplatin administration and continued for 10 consecutive d. Sensory behavioral examinations, protein levels of transient receptor potential channels (TRPM8 and TRPV1) in dorsal root ganglia (DRG) and substance P (SP) in spinal dorsal horn were examined...
April 19, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28408818/anti-inflammatory-activity-of-niosomes-entrapped-with-plai-oil-zingiber-cassumunar-roxb-by-therapeutic-ultrasound-in-a-rat-model
#7
Jirakrit Leelarungrayub, Jiradej Manorsoi, Aranya Manorsoi
OBJECTIVE: The aim of this study was to evaluate the antioxidant and anti-inflammatory activities of Plai oil-encapsulated niosomes (Zingiber cassumunar Roxb.) on inflamed subcutaneous Wistar rat skin by therapeutic ultrasound. METHODS: Pure oil from Plai rhizomes was extracted by steam distillation, and antioxidant activities were determined by 2,2-diphenyl-1-picrylhydrazyl radical scavenging assay. Bioactive compounds were analyzed by gas chromatography-mass spectrometry...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28408061/predicting-tissue-susceptibility-to-mechanical-cavitation-damage-in-therapeutic-ultrasound
#8
Lauren Mancia, Eli Vlaisavljevich, Zhen Xu, Eric Johnsen
Histotripsy is a developing focused ultrasound procedure that uses cavitation bubbles to mechanically homogenize soft tissue. To better understand the mechanics of tissue damage, a numerical model of single-bubble dynamics was used to calculate stress, strain and strain rate fields produced by a cavitation bubble exposed to a tensile histotripsy pulse. The explosive bubble growth and its subsequent collapse were found to depend on the properties of the surrounding material and on the histotripsy pulse. Stresses far greater than gigapascals were observed close to the bubble wall, but attenuated by four to six orders of magnitude within 50 μm from the bubble wall, with at least two orders of magnitude attenuation occurring within the first 10 μm from the bubble...
April 10, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28338392/the-effects-of-low-intensity-therapeutic-ultrasound-litus-on-measurable-outcomes-a-critically-appraised-topic
#9
Sarah Daniels, Gabriela Santiago, Jennifer Cuchna, Bonnie Van Lunen
Therapeutic Ultrasound (US) is a popular modality among healthcare professionals and is used to treat a variety of musculoskeletal conditions.(1) Throughout the past 70 years of clinical use,(2) ultrasound has been shown to be an effective way to decrease pain,(2,3) increase tissue temperature,(4) and decrease tissue stiffness of trigger points,(5) amidst other benefits. Treatment parameters with US are typically high-intensity and occur over a short period of time (minutes). The US machine is large and stationary, forcing patients to be non-mobile for the duration of their treatment...
March 24, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28322306/ultrasound-mediated-delivery-of-oxygen-and-lll12-loaded-stimuli-responsive-microdroplets-for-the-treatment-of-hypoxic-cancer-cells
#10
Jinshun Xu, Shuai Yuan, Jilai Tian, Kyle A Martin, Jinhua Song, Chenglong Li, Zhigang Wang, Jiayuh Lin, Ting Si, Ronald X Xu
LLL12 exhibits high specificity for inhibiting STAT3 phosphorylation and dimerization, and inducing apoptosis to constitutively activated STAT3 cancer cells without cytotoxicity to normal cells with dormant STAT3. However, clinical deployment of LLL12 in cancer treatment is hindered by its low bioavailability and hypoxia-induced resistance. To overcome these limitations, we encapsulate both oxygen and LLL12 in stimuli responsive microdroplets (SRMs) by a gas-driven coaxial flow focusing (CFF) process for ultrasound mediated treatment of hypoxic cancer cells...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28319508/exercise-combined-with-ultrasound-attenuates-neuropathic-pain-in-rats-associated-with-downregulation-of-il-6-and-tnf-%C3%AE-but-with-upregulation-of-il-10
#11
Po-Ching Huang, Kun-Ling Tsai, Yu-Wen Chen, Heng-Teng Lin, Ching-Hsia Hung
BACKGROUND: Although there are several evidences that suggest efficacies of therapeutic ultrasound (TU) or treadmill exercise (TE) to alleviate nerve injury-associated pain, molecular mechanisms are less clear. We aimed to investigate the impact of TU and/or TE on neuropathic pain induced by chronic constriction injury (CCI) of the sciatic nerve and their roles of proinflammatory and anti-inflammatory cytokines. METHODS: Rats were randomly divided into (n = 10 per group) sham operation (sham), CCI procedure followed by false application of TU (CCI + TU0), CCI procedure followed by false application of TU and TE (CCI + TU0 + TE), CCI, and CCI procedure followed by TU alone (CCI + TU), TE alone (CCI + TE), or both TU and TE (CCI + TU + TE) groups...
June 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28265413/microvessel-rupture-induced-by-high-intensity-therapeutic-ultrasound-a-study-of-parameter-sensitivity-in-a-simple-in-vivo-model
#12
Yeonho Kim, Marjan Nabili, Priyanka Acharya, Asis Lopez, Matthew R Myers
BACKGROUND: Safety analyses of transcranial therapeutic ultrasound procedures require knowledge of the dependence of the rupture probability and rupture time upon sonication parameters. As previous vessel-rupture studies have concentrated on a specific set of exposure conditions, there is a need for more comprehensive parametric studies. METHODS: Probability of rupture and rupture times were measured by exposing the large blood vessel of a live earthworm to high-intensity focused ultrasound pulse trains of various characteristics...
2017: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/28263564/theranostic-multilayer-capsules-for-ultrasound-imaging-and-guided-drug-delivery
#13
Jun Chen, Sithira Ratnayaka, Aaron Alford, Veronika Kozlovskaya, Fei Liu, Bing Xue, Kenneth Hoyt, Eugenia Kharlampieva
Despite the accessibility of ultrasound, the clinical potential of ultrasound-active theranostic agents has not been fully realized because it requires combining sufficient imaging contrast, high encapsulation efficiency, and ultrasound-triggered release in one entity. We report on theranostic polymer microcapsules composed of hydrogen-bonded multilayers of tannic acid and poly(N-vinylpyrrolidone) that produce high imaging contrast and deliver the anticancer drug doxorubicin upon low-power diagnostic or high-power therapeutic ultrasound irradiation...
March 28, 2017: ACS Nano
https://www.readbyqxmd.com/read/28253700/the-effects-of-heat-and-mass-diffusion-on-freely-oscillating-bubbles-in-a-viscoelastic-tissue-like-medium
#14
Carlos Barajas, Eric Johnsen
In certain cavitation-based ultrasound techniques, the relative importance of thermally vs mechanically induced damage is unclear. As a first step to investigate this matter, a numerical model for bubble dynamics in tissue-like, viscoelastic media is presented in which full thermal effects are included inside and outside the bubble, as well as interdiffusion of vapor and non-condensible gas inside the bubble. Soft tissue is assumed to behave according to a Kelvin-Voigt model in which viscous and elastic contributions are additive...
February 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28244011/focused-ultrasound-an-emerging-therapeutic-modality-for-neurologic-disease
#15
Paul S Fishman, Victor Frenkel
Therapeutic ultrasound is only beginning to be applied to neurologic conditions, but the potential of this modality for a wide spectrum of brain applications is high. Engineering advances now allow sound waves to be targeted through the skull to a brain region selected with real time magnetic resonance imaging and thermography, using a commercial array of focused emitters. High intensities of sonic energy can create a coagulation lesion similar to that of older radiofrequency stereotactic methods, but without opening the skull...
April 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/28211702/antimicrobial-effect-of-biocompatible-silicon-nanoparticles-activated-using-therapeutic-ultrasound
#16
Svetlana N Shevchenko, Markus Burkhardt, Eugene V Sheval, Ulyana A Natashina, Christina Grosse, Alexander L Nikolaev, Alexander V Gopin, Ute Neugebauer, Andrew A Kudryavtsev, Vladimir Sivakov, Liubov A Osminkina
In this study, we report a method for the suppression of Escherichia coli (E. coli) vitality by means of therapeutic ultrasound irradiation (USI) using biocompatible silicon nanoparticles as cavitation sensitizers. Silicon nanoparticles without (SiNPs) and with polysaccharide (dextran) coating (DSiNPs) were used. Both types of nanoparticles were nontoxic to Hep 2 cells up to a concentration of 2 mg/mL. The treatment of bacteria with nanoparticles and application of 1 W/cm(2) USI resulted in the reduction of their viabilities up to 35 and 72% for SiNPs and DSiNPs, respectively...
March 14, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28211622/mri-guided-focused-ultrasound-robotic-system-for-animal-experiments
#17
Marinos Yiannakou, Georgios Menikou, Christos Yiallouras, Cleanthis Ioannides, Christakis Damianou
BACKGROUND: In this paper an MRI-guided focused ultrasound (MRgFUS) robotic system was developed that can be used for conducting experiments in small animals.The target for this robotic system regarding motion was to move a therapeutic ultrasound transducer in two Cartesian axes. METHODS: A single element spherically focused transducer of 3 cm diameter, focusing at 7 cm and operating at 0.4 MHz was used. The positioning device incorporates only MRI compatible materials...
February 17, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28194375/rehabilitation-of-hamstring-muscle-injuries-a-literature-review
#18
REVIEW
Gabriel Amorim Ramos, Gustavo Gonçalves Arliani, Diego Costa Astur, Alberto de Castro Pochini, Benno Ejnisman, Moisés Cohen
Hamstring injuries are among the most frequent in sports. The high relapse rate is a challenge for sports medicine and has a great impact on athletes and sport teams. The treatment goal is to provide the athlete the same functional level as before the injury. Thus, functional rehabilitation is very important to the success of the treatment. Currently, several physical therapy modalities are used, according to the stage of the lesion, such as cryotherapy, laser therapy, therapeutic ultrasound, therapeutic exercise, and manual therapy...
January 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28182513/effects-of-long-duration-low-intensity-ultrasound-for-active-trapezius-trigger-points-a-randomized-clinical-trial
#19
Justin H Rigby, David O Draper
CONTEXT: Upper trapezius trigger points can be debilitating and often lead to chronic pain. OBJECTIVE: To determine if long duration low intensity therapeutic ultrasound is effective at treating upper trapezius trigger point pain compared to an inactive placebo treatment. DESIGN: Randomized control trial. SETTING: Research laboratory. PATIENTS OR OTHER PARTICIPANTS: Fifty-one participants (19 males, 32 females, age = 31...
February 9, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28177935/cytotoxicity-control-of-silicon-nanoparticles-by-biopolymer-coating-and-ultrasound-irradiation-for-cancer-theranostic-applications
#20
A P Sviridov, L A Osminkina, A Yu Kharin, M B Gongansky, J V Kargina, A A Kudryavtsev, Yu I Bezsudnova, T S Perova, A Geloen, V Lysenko, V Yu Timoshenko
Silicon nanoparticles (SiNPs) prepared by mechanical grinding of luminescent porous silicon were coated with a biopolymer (dextran) and investigated as a potential theranostic agent for bioimaging and sonodynamic therapy. Transmission electron microscopy, photoluminescence and Raman scattering measurements of dextran-coated SiNPs gave evidence of their enhanced stability in water. In vitro experiments confirmed the lower cytotoxicity of the dextran-coated NPs in comparison with uncoated ones, especially for high concentrations of about 2 mg ml(-1)...
March 10, 2017: Nanotechnology
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