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https://www.readbyqxmd.com/read/28230569/procedure-oriented-torsional-anatomy-of-the-hand-for-spasticity-injection
#1
Joslyn John, John Cianca, Faye Chiou-Tan, Sindhu Pandit, Erin Furr-Stimming, Katherine H Taber
OBJECTIVES: To provide musculoskeletal ultrasound (MSKUS) images of hand anatomy in the position of hemiparetic flexion as a reference for spasticity injections. After a stroke, spasticity can result in anatomic distortion of the hand. Spasticity may require treatment with botulinum toxin or phenol injections. Anatomic distortion may decrease the accuracy of injections. Standard anatomic references are of limited utility because they are not in this spastic hemiparetic position. There presently is no anatomic reference in the literature for these spastic postures...
February 23, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28227203/real-time-ultrasound-based-control-of-a-virtual-hand-by-a-trans-radial-amputee
#2
Clayton A Baker, Nima Akhlaghi, Huzefa Rangwala, Jana Kosecka, Siddhartha Sikdar, Clayton A Baker, Nima Akhlaghi, Huzefa Rangwala, Jana Kosecka, Siddhartha Sikdar, Nima Akhlaghi, Siddhartha Sikdar, Clayton A Baker, Jana Kosecka, Huzefa Rangwala
Advancements in multiarticulate upper-limb prosthetics have outpaced the development of intuitive, non-invasive control mechanisms for implementing them. Surface electromyography is currently the most popular non-invasive control method, but presents a number of drawbacks including poor deep-muscle specificity. Previous research established the viability of ultrasound imaging as an alternative means of decoding movement intent, and demonstrated the ability to distinguish between complex grasps in able-bodied subjects via imaging of the anterior forearm musculature...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227117/altered-viscoelastic-properties-of-stroke-affected-muscles-estimated-using-ultrasound-shear-waves-preliminary-data
#3
Ghulam Rasool, Allison B Wang, William Z Rymer, Sabrina S M Lee, Ghulam Rasool, Allison B Wang, William Z Rymer, Sabrina S M Lee, Ghulam Rasool, Sabrina S M Lee, Allison B Wang, William Z Rymer
As a result of a brain injury such as stroke, the skeletal muscles may undergo numerous structural and functional alterations. These abnormal changes are linked to muscle weakness, joint contracture, and abnormal muscle tone and eventually, result in motor impairment. A subset of these alterations affects passive muscle stiffness, i.e., viscoelastic properties. However, in vivo estimation of changes in viscoelastic properties is a challenging task. Here, we used the shear wave velocity, estimated through ultrasound SuperSonic imaging (SSI), as a surrogate for viscoelastic properties...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227116/force-controlled-ultrasound-to-measure-passive-mechanical-properties-of-muscle-in-duchenne-muscular-dystrophy
#4
Anne J Pigula, Jim S Wu, Matthew W Gilbertson, Basil T Darras, Seward B Rutkove, Brian W Anthony, Anne J Pigula, Jim S Wu, Matthew W Gilbertson, Basil T Darras, Seward B Rutkove, Brian W Anthony, Anne J Pigula, Brian W Anthony, Seward B Rutkove, Basil T Darras, Jim S Wu, Matthew W Gilbertson
The purpose of this study is to assess differences in skeletal muscle compressibility between patients with Duchenne muscular dystrophy (DMD) and normal subjects. The transverse passive mechanical properties of muscle, particularly those related to stiffness and elasticity, can be measured using force-controlled ultrasound. We acquired ultrasound videos of muscle compression under known pressures in the biceps and quadriceps in 23 boys with DMD and 20 age-matched healthy controls. We calculated the bulk linear spring constant, nonlinear stress-strain response, and average Young's modulus for each...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225357/robust-sound-speed-estimation-for-ultrasound-based-hepatic-steatosis-assessment
#5
Imbault Marion, Alex Faccinetto, Bruno-Felix Osmanski, Antoine Tissier, Thomas Deffieux, Jean-Luc Gennisson, Valerie Vilgrain, Mickael Tanter
Hepatic steatosis is a common condition, the prevalence of which is increasing along with non-alcoholic fatty liver disease (NAFLD). Currently, the most accurate noninvasive imaging method for diagnosing and quantifying hepatic steatosis is MRI, which estimates the Proton-Density Fat Fraction (PDFF) as a measure of fractional fat content. However, MRI suffers several limitations including cost, contra-indications and poor availability. Although conventional ultrasound is widely used by radiologists for hepatic steatosis assessment, it remains qualitative and operator dependent...
February 22, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28217414/dance-balance-and-core-muscle-performance-measures-are-improved-following-a-9-week-core-stabilization-training-program-among-competitive-collegiate-dancers
#6
Todd Watson, Jessica Graning, Sue McPherson, Elizabeth Carter, Joshuah Edwards, Isaac Melcher, Taylor Burgess
BACKGROUND: Dance performance requires not only lower extremity muscle strength and endurance, but also sufficient core stabilization during dynamic dance movements. While previous studies have identified a link between core muscle performance and lower extremity injury risk, what has not been determined is if an extended core stabilization training program will improve specific measures of dance performance. HYPOTHESIS/PURPOSE: This study examined the impact of a nine-week core stabilization program on indices of dance performance, balance measures, and core muscle performance in competitive collegiate dancers...
February 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28215966/does-patient-perception-differ-following-adductor-canal-block-and-femoral-nerve-block-in-total-knee-arthroplasty-a-simultaneous-bilateral-randomized-study
#7
Hyun J Koh, In J Koh, Man S Kim, Keun Y Choi, Hyeon U Jo, Yong In
BACKGROUND: Femoral nerve block (FNB) has been used as part of the multimodal analgesia after total knee arthroplasty (TKA), but leads to weakness in the quadriceps muscles. Recently, adductor canal block (ACB) was reported to provide effective pain relief while sparing the strength of the quadriceps. This simultaneous bilateral randomized study investigated whether patients perceived differences between ACB and the FNB after same-day bilateral TKA. METHODS: We performed a prospective simultaneous bilateral randomized study in 50 patients scheduled to undergo same-day bilateral TKA...
January 26, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28215129/longitudinal-changes-in-anthropometrics-and-impact-on-self-reported-physical-function-after-traumatic-brain-injury
#8
Lee-Anne S Chapple, Adam M Deane, Lauren T Williams, Richard Strickland, Chris Schultz, Kylie Lange, Daren K Heyland, Marianne J Chapman
BACKGROUND AND AIMS: Patients admitted to the ICU with a traumatic brain injury (TBI) are at risk of muscle wasting but this has not been quantified. Our aims were to describe longitudinal changes in anthropometrical data, compare the accuracy of non-invasive methodologies to the validated dual-energy x-ray absorptiometry (DXA), and assess the relationships between anthropometrical data and self-reported physical function. METHODS: In a prospective observational study, we recruited patients admitted to the ICU with a moderate-to-severe TBI over 12 months...
March 2017: Critical Care and Resuscitation: Journal of the Australasian Academy of Critical Care Medicine
https://www.readbyqxmd.com/read/28211204/evaluation-of-the-enhanced-permeability-and-retention-effect-in-the-early-stages-of-lymph-node-metastasis
#9
Mamoru Mikada, Ariunbuyan Sukhbaatar, Yoshinobu Miura, Sachiko Horie, Maya Sakamoto, Shiro Mori, Tetsuya Kodama
Most solid cancers spread to new sites via the lymphatics before hematogenous dissemination. However, only a small fraction of an intravenously administered anti-cancer drug enters the lymphatic system to reach metastatic lymph nodes (LNs). Here, we show that the enhanced permeability and retention (EPR) effect is not induced during the early stages of LN metastasis. Luciferase-expressing tumor cells were injected into the subiliac LN of the MXH10/Mo-lpr/lpr mouse to induce metastasis to the proper axillary LN (PALN)...
February 17, 2017: Cancer Science
https://www.readbyqxmd.com/read/28210025/vascular-lipoleiomyoma-of-the-uterus-an-unusual-case
#10
Vesna Chibisheva, Vesna Antovska, Milka Trajanova, Drage Dabeski, Rubens Jovanovic, Ivana Kijajova
INTRODUCTION: Uterine lipoleiomyomas are a rare type of uterine myomas, which have been seldom diagnosed and are less known and still unusual. Histologically they are composed of smooth muscle cells with multiple fat cells and fibrous tissue. Their pathogenesis is still a stigmata and their preoperative diagnosis is still questionable. CASE REPORT HISTORY: A 39-year old woman presented at the University clinic for obstetrics and gynecology with complaints of a mild low abdominal and pelvic pain, increased frequency of vaginal bleeding and abdominal distension...
December 2016: Medical Archives
https://www.readbyqxmd.com/read/28205264/the-influence-of-patellar-tendon-and-muscle-tendon-unit-stiffness-on-quadriceps-explosive-strength-in-man
#11
Garry J Massey, Thomas G Balshaw, Thomas M Maden-Wilkinson, Neale A Tillin, Jonathan P Folland
The influence of musculotendinous tissue stiffness on contractile rate of torque development (RTD) remains opaque. This study examined the relationships between both patellar tendon (PT) and vastus lateralis (VL) muscle-tendon unit (MTU) stiffness, and voluntary and evoked knee extension RTD. Fifty-two healthy untrained males completed duplicate laboratory sessions. Absolute and relative RTD was measured at 50 Nm/25%MVT increments from onset and sequentially during explosive voluntary and evoked octet (supramaximal stimulation: [8 pulses at 300 Hz]) isometric contractions...
February 15, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28203022/-clinical-evaluation-of-in-plane-ultrasound-guided-thoracic-paravertebral-block-using-laterally-intercostal-approach
#12
T Xu, M Li, Y Tian, J T Song, C Ni, X Y Guo
OBJECTIVE: To evaluate the feasibility and success rate of in-plane ultrasound-guided paravertebral block using laterally intercostal approach. METHODS: In the study, 27 patients undergoing elective thoracic surgery were selected to do paravertebral block preoperatively. The fifth intercostal space was scanned by ultrasound probe which was placed along the long axis of the rib and 8 cm lateral to the midline of the spine. The needle was advanced in increments aiming at the space between the internal and innermost intercostal muscles...
February 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28202584/comparison-of-human-gastrocnemius-forces-predicted-by-hill-type-muscle-models-and-estimated-from-ultrasound-images
#13
Taylor J M Dick, Andrew A Biewener, James M Wakeling
Hill-type models are ubiquitous in the field of biomechanics, providing estimates of a muscle's force as a function of its activation state and its assumed force-length and force-velocity properties. However, despite their routine use, the accuracy with which Hill-type models predict the forces generated by muscles during submaximal, dynamic tasks remains largely unknown. This study compared human gastrocnemii forces predicted by Hill-type models to the forces estimated from ultrasound-based measures of tendon length changes and stiffness during cycling, over a range of loads and cadences...
February 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28202349/muscle-ultrasound-and-sarcopenia-in-older-individuals-a-clinical-perspective
#14
REVIEW
Andrea Ticinesi, Tiziana Meschi, Marco V Narici, Fulvio Lauretani, Marcello Maggio
INTRODUCTION: A precise quantitative measurement of skeletal muscle mass is fundamental for diagnosing sarcopenia in older individuals. The current techniques of assessment, including dual-energy x-ray absorptiometry (DXA), bioimpedance analysis (BIA), and magnetic resonance imaging (MRI) are either difficult to perform in everyday clinical practice or biased by concurrent clinical confounders. B-mode muscle ultrasound can be helpful in assessing muscle mass and architecture, and thus possibly useful for diagnosing or screening sarcopenia...
February 12, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28199008/comparison-of-the-spread-of-two-different-volumes-of-contrast-medium-when-performing-ultrasound-guided-transversus-abdominis-plane-injection-in-dog-cadavers
#15
A Zoff, P Laborda-Vidal, J Mortier, M Amengual, E Rioja
OBJECTIVES: To compare, via CT imaging, the spread of different volumes of diluted iodinated contrast medium in the transversus abdominis muscle plane of dog cadavers. METHODS: Prospective, randomised study. An electro stimulation or a SonoTAP needle was inserted in plane with the ultrasound beam in the fascia between the internal oblique and transversus abdominis muscles. A test dose of 1 ml of diluted contrast (30 mg/mL iohexol) was injected to confirm positioning, followed by 0 · 5 mL/kg (n=14) or 1 mL/kg (n=12) and the distribution of the fluid compared...
February 15, 2017: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/28198659/intra-and-inter-rater-reliabilities-of-measurement-of-ultrasound-imaging-for-muscle-thickness-and-pennation-angle-of-tibialis-anterior-muscle-in-stroke-patients
#16
Ki Hun Cho, Hwang Jae Lee, Wan Hee Lee
BACKGROUND: Dysfunction of skeletal muscle has been commonly reported in stroke patients. OBJECTIVE: The purpose of this study was to investigate the intra- and inter-rater reliabilities of measurement of ultrasound imaging (USI) for pennation angle (PA) and muscle thickness (MT) of tibialis anterior muscle in stroke patients. METHODS: Thirty-four stroke patients (19 men) participated in this study. USI was used for measurement of PA and MT of the tibialis anterior muscles at rest and during maximum voluntary contraction (MVC)...
February 15, 2017: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/28196770/effect-of-low-intensity-cavitation-on-the-isolated-human-thoracic-artery-in%C3%A2-vitro
#17
Algimantas Bubulis, Vida Garalienė, Vytautas Jurėnas, Jonas Navickas, Saulius Giedraitis
Reported here are the results of an experimental study on the response to low-intensity cavitation induced by low-frequency (4-6 W/cm(2), 20 kHz and 32.6 kHz) ultrasound of isolated human arterial samples taken during conventional myocardial revascularization operations. Studies have found that low-frequency ultrasound results in a significant (48%-54%) increase in isometric contraction force and does not depend on the number of exposures (10 or 20) or the time passed since the start of ultrasound (0, 10 and 20 min), but does depend on the frequency and location (internal or external) of the blood vessels for the application of ultrasound...
February 10, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28196515/preoperative-and-intraoperative-ultrasound-aids-removal-of-migrating-plant-material-causing-iliopsoas-myositis-via-ventral-midline-laparotomy-a-study-of-22-dogs
#18
Francesco Birettoni, Domenico Caivano, Mark Rishniw, Giulia Moretti, Francesco Porciello, Maria Elena Giorgi, Alberto Crovace, Erika Bianchini, Antonello Bufalari
BACKGROUND: Migrating plant material is often suspected clinically to be the underlying cause of iliopsoas myositis in the dog, but cannot always be found pre- or intraoperatively. In most cases, recurrence of clinical signs is related to failure to remove the plant material. Preoperative ultrasonography can be useful to visualize migrating plant material and to determine anatomical landmarks that can assist in planning a surgical approach. The purpose of the present study was to report the role of intraoperative (intra-abdominal) ultrasonography for visualizing and removing the plant material from iliopsoas abscesses using a ventral midline laparotomy approach...
February 14, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28195898/ultrasound-guided-glossopharyngeal-nerve-block-a-cadaver-and-a-volunteer-sonoanatomy-study
#19
Josip Ažman, Tatjana Stopar Pintaric, Erika Cvetko, Kamen Vlassakov
BACKGROUND AND OBJECTIVES: Glossopharyngeal nerve (GPN) blocks are usually performed by topical, intraoral, or peristyloid approaches, which carry significant complication risks due to the proximity of important neurovascular structures. This study presents a proof of concept for a new ultrasound (US)-guided technique, which would block the GPN distally, in the parapharyngeal space, away from the immediate vicinity of high-risk collateral structures. METHODS: Five cadaver heads were dissected, and the location of the GPN was explored bilaterally...
March 2017: Regional Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/28195846/color-doppler-ultrasound-assessment-of-activity-in-keloids
#20
Nelson Lobos, Ximena Wortsman, Fernando Valenzuela, Faustino Alonso
BACKGROUND: The assessment of activity in keloids may be critical for defining their management. There is a lack of clinical scorings designed for the evaluation of keloids and biopsies may be contraindicated. OBJECTIVE: To assess the sonographic activity of keloids in comparison with clinical scoring. MATERIALS AND METHODS: A retrospective study of the clinical and color Doppler ultrasound (CDU) images of patients medically derived to CDU with the diagnosis of keloid was performed...
February 9, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
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