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https://www.readbyqxmd.com/read/28727745/evaluation-of-tissue-displacement-and-regional-strain-in-the-achilles-tendon-using-quantitative-high-frequency-ultrasound
#1
Stijn Bogaerts, Catarina De Brito Carvalho, Lennart Scheys, Kaat Desloovere, Jan D'hooge, Frederik Maes, Paul Suetens, Koen Peers
The Achilles tendon has a unique structure-function relationship thanks to its innate hierarchical architecture in combination with the rotational anatomy of the sub-tendons from the triceps surae muscles. Previous research has provided valuable insight in global Achilles tendon mechanics, but limitations with the technique used remain. Furthermore, given the global approach evaluating muscle-tendon junction to insertion, regional differences in tendon mechanical properties might be overlooked. However, recent advancements in the field of ultrasound imaging in combination with speckle tracking have made an intratendinous evaluation possible...
2017: PloS One
https://www.readbyqxmd.com/read/28724698/acute-achilles-tendon-rupture
#2
Dishan Singh
This is one of a series of occasional articles highlighting conditions that may be more common than many doctors realise or may be missed at first presentation. The series advisers are Anthony Harnden, professor of primary care, Department of Primary Care Health Sciences, University of Oxford, and Richard Lehman, general practitioner, Banbury. To suggest a topic for this series, please email us at practice@bmj.com.
August 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28723790/relationship-of-medial-gastrocnemius-relative-fascicle-excursion-and-ankle-joint-power-and-work-performance-during-gait-in-typically-developing-children-a-cross-sectional-study
#3
Teresa Martín Lorenzo, Gustavo Albi Rodríguez, Eduardo Rocon, Ignacio Martínez Caballero, Sergio Lerma Lara
Muscle fascicles lengthen in response to chronic passive stretch through in-series sarcomere addition in order to maintain an optimum sarcomere length. In turn, the muscles' force generating capacity, maximum excursion, and contraction velocity is enhanced. Thus, longer fascicles suggest a greater capacity to develop joint power and work. However, static fascicle length measurements may not be taking sarcomere length differences into account. Thus, we considered relative fascicle excursions through passive ankle dorsiflexion may better correlate with the capacity to generate joint power and work than fascicle length...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28720001/differential-effects-of-heat-stress-on-fibre-capillarisation-in-tenotomised-soleus-and-plantaris-muscles
#4
Muthita Hirunsai, Ratchakrit Srikuea
PURPOSE: Capillary regression is commonly observed in response to disuse muscle atrophy. Heat stress is known to alleviate muscle atrophy, while effect of heat exposure on capillary adaptation following disuse atrophy is not defined. Here, we examined the effect of heat treatment on capillarisation and the associated signalling in slow-oxidative soleus and fast-glycolytic plantaris muscles following Achilles tendon ablation (tenotomy). MATERIALS AND METHODS: Male Wistar rats were assigned into control (CON), control with heat stress (CON + HEAT), tenotomy (TEN) and tenotomy with heat stress (TEN + HEAT) groups...
July 18, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28717629/ultrasound-measures-of-tendon-thickness-intra-rater-inter-rater-and-inter-machine-reliability
#5
María Elena Del Baño-Aledo, Jacinto Javier Martínez-Payá, José Ríos-Díaz, Silvia Mejías-Suárez, Sergio Serrano-Carmona, Ana de Groot-Ferrando
BACKGROUND: Ultrasound imaging is often used by physiotherapists and other healthcare professionals but the reliability of image acquisition with different ultrasound machines is unknown. The objective was to compare the intra-rater, inter-rater and intermachine reliability of thickness measurements of the plantar fascia (PF), Achilles tendon (AT), patellar tendon (PT) and elbow common extensor tendon (ECET) with musculoskeletal ultrasound imaging (MSUS). METHODS: Tendon thickness was measured in four anatomical structures (14 participants, 28 images per tendon) by two sonographers and with two different ultrasound machines...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717615/outcomes-of-prolotherapy-for-intra-tendinous-achilles-tears-a-case-series
#6
Otto Chan, Ben Havard, Sarah Morton, Mel Pritchard, Nicola Maffulli, Tom Crisp, Nat Padhiar, Jeremy David Perry, John King, Dylan Morrissey
BACKGROUND: The intra-tendinous tear is a new pathology that is defined as a discontinuity of fibres situated entirely within the tendon. Prolotherapy involves injecting an irritant, such as hyperosmolar dextrose, to stimulate a tissue healing response and ultimately reduce pain. METHODS: 43 consecutive patients diagnosed with an intra-tendinous tear were included (27 males: 16 females, mean (SD) age 41 (11.3). Patients were injected with 0.4ml-1.5ml (mean 0.8ml) of 50% dextrose and 0...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717614/activity-level-recovery-after-acute-achilles-tendon-rupture-surgically-repaired-a-series-of-29-patients-with-a-mean-follow-up-of-46-months
#7
Richard Zayni, Raphaël Coursier, Moudasser Zakaria, Jean-François Desrousseaux, Denis Cordonnier, Gilles Polveche
BACKGROUND: Achilles tendon rupture is a common injury but its optimal management is still controversial. When decided, surgical repair can be performed by open or percutaneous techniques. Till now, there is no agreement on the ideal type of surgical management. PURPOSE: To compare the outcomes of the percutaneous and open surgical treatment for acute Achilles tendon rupture and to assess the postoperative activity level recovery. METHODS: Between 2008 and 2013, 29 patients were surgically treated for acute Achilles tendon rupture in our institution...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717613/morphometric-evaluation-of-human-tendocalcaneus-a-cadaveric-study-of-south-indian-male-population
#8
Naveen Kumar, Ashwini P Aithal, Satheesha B Nayak, Jyothsna Patil, Abhinitha Padavinangadi, Biswa Bina Ray
INTRODUCTION: Tendocalcaneus or Achilles tendon is formed by the fusion of the tendons of gastrocnemius and soleus muscles. Normal morphometric measurements of tendo-calcaneus serves an important landmark in its anthropometric evaluation and biomechanical characteristics. Hence the objective of this study was to provide detailed morphometric profile of tendocalcaneus in south indian cadaveric male population. MATERIALS AND METHOD: A total of 64 dissected adult limbs was studied...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717612/intratendinous-tears-of-the-achilles-tendon-a-new-pathology-analysis-of-a-large-4-year-cohort
#9
Otto Chan, Sarah Morton, Mel Pritchard, Tina Parkes, Peter Malliaras, Tom Crisp, Nat Padhiar, Nicola Maffulli, John King, Dylan Morrissey
BACKGROUND: Achillodynia is common and includes Achilles tendinopathy, partial Achilles tears and Achilles tendon ruptures. However, we believe an additional pathology should be considered for Achillodynia differentials - the intratendinous tear (ITT). METHODS: Examinations of 740 achillodynic patients in one specialist centre were reviewed. ITTs were defined as a clearly visualised echopoor area situated centrally and extending to, but not through the tendon periphery, with pain on palpation and no clinical findings consistent with Achilles rupture...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717611/conservative-minimally-invasive-and-open-surgical-repair-for-management-of-acute-ruptures-of-the-achilles-tendon-a-clinical-and-functional-retrospective-study
#10
Gayle Maffulli, Angelo Del Buono, Paula Richards, Francesco Oliva, Nicola Maffulli
BACKGROUND: At present, it is unclear which is the best management for Achilles tendon rupture. PURPOSE: We assess the clinical, functional and imaging outcomes of active patients undergoing 3 different types of management for acute subcutaneous rupture of the Achilles tendon, including conservative cast immobilization, traditional open surgery and percutaneous repair. METHODS: 26 active patients were managed for a rupture of the Achilles Tendon from January 2007 to March 2008...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28705996/different-gene-response-to-mechanical-loading-during-early-and-late-phases-of-rat-achilles-tendon-healing
#11
Malin Hammerman, Parmis Blomgran, Arie Dansac, Pernilla Eliasson, Per Aspenberg
Mechanical loading stimulates tendon healing both when applied in the inflammatory phase and in the early remodeling phase of the process, although not necessarily via the same mechanisms. We investigated the gene response to mechanical loading in these two phases of tendon healing. The right Achilles tendon in rats was transected and the hind limbs were unloaded by tail suspension. The rats were exposed to 5 minutes of treadmill running 3 or 14 days after tendon transection. Thereafter, they were re-suspended for 15 minutes or 3 hours until euthanasia...
July 13, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28699355/content-relevance-of-the-foot-and-ankle-ability-measure-in-patients-with-achilles-tendon-diseases
#12
Christopher W Reb, Sundeep S Saini, James F Stenson, Mohamed F Albana, David I Pedowitz, Steven M Raikin, Joseph N Daniel
BACKGROUND: The Foot and Ankle Ability Measure (FAAM) is among the most widely utilized and best psychometrically supported lower extremity-specific patient-reported outcome measures. However, its content relevance has never been directly subjected to patient assessment. METHODS: This was an institutional review board-approved, prospective, cross-sectional study of 75 patients with Achilles tendon diseases who ranked the relevance of the FAAM's items and subscales as 1 = Not relevant, 2 = Somewhat relevant, or 3 = Very relevant...
July 1, 2017: Foot & Ankle Specialist
https://www.readbyqxmd.com/read/28698601/characteristics-of-sonography-in-a-rat-achilles-tendinopathy-model-possible-non-invasive-predictors-of-biomechanics
#13
Su-Ya Lee, Hsiao-Feng Chieh, Chien-Ju Lin, I-Ming Jou, Yung-Nien Sun, Li-Chieh Kuo, Po-Ting Wu, Fong-Chin Su
The purpose of this study was to investigate the dynamic changes of histopathology, biomechanical properties, echo intensity, and ultrasound features in a collagenase-induced tendinopathy model of rat Achilles tendons, and to examine the associations among biomechanical properties, echo intensity, and ultrasound features. Forty-two rats received an ultrasound-guided collagenase injection on their left Achilles tendons, and needle puncture on the right ones as the control. At four, eight, and twelve weeks post-injury, the tendons were examined via measurements of their biomechanical properties, histopathological and ultrasonographic characteristics...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28698221/patellar-and-achilles-tendinopathies-are-predominantly-peripheral-pain-states-a-blinded-case-control-study-of-somatosensory-and-psychological-profiles
#14
Melanie L Plinsinga, Cornelis P van Wilgen, Michel S Brink, Viana Vuvan, Aoife Stephenson, Luke J Heales, Rebecca Mellor, Brooke K Coombes, Bill T Vicenzino
STUDY DESIGN: Case-control design. BACKGROUND: Tendinopathy is characterised by pain on tendon loading. In persistent cases of upper limb tendinopathy, it is frequently associated with central nervous system sensitisation, whereas less commonly linked in the case of persistent lower limb tendinopathies. OBJECTIVES: Compare somatosensory and psychological profiles of participants with persistent patellar (PT) and Achilles tendinopathies (AT) with pain-free controls...
July 11, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28693535/alfredson-versus-silbernagel-exercise-therapy-in-chronic-midportion-achilles-tendinopathy-study-protocol-for-a-randomized-controlled-trial
#15
Bas Habets, Robert E H van Cingel, Frank J G Backx, Bionka M A Huisstede
BACKGROUND: Midportion Achilles tendinopathy (AT) is a common overuse injury, usually requiring several months of rehabilitation. Exercise therapy of the ankle plantar flexors (i.e. tendon loading) is considered crucial during conservative rehabilitation. Alfredson's isolated eccentric and Silbernagel's combined concentric-eccentric exercise programs have both shown beneficial results, but it is unknown whether any of these programs is superior for use in clinical practice. Therefore, the primary objective of this study is to compare the effectiveness of both programs on clinical symptoms...
July 11, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28690469/ankle-reconstruction-in-fibular-hemimelia-new-approach
#16
Hany Hefny, ElHussein M Elmoatasem, Mahmoud Mahran, Tamer Fayyad, Mohamed A Elgebeily, Ahmed Mansour, Mamdouh Hefny
BACKGROUND: Fibular hemimelia is a congenital disorder that is characterized by the absence of the fibula that could be either partial or complete. Successful management aims to restore normal weight bearing and normal limb length. The introduction of the Ilizarov method of limb lengthening has provided an attractive alternative to amputation. During lengthening, the tight posterolateral soft-tissue structures, the thick fibrous fibular band, and the shortened Achilles tendon become tighter and transfer a valgus force to the talus and calcaneus, further aggravating the deformity...
July 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28690461/hospital-for-special-surgery-acl-registry-2-year-outcomes-suggest-low-revision-and-return-to-or-rates
#17
Moira McCarthy, Katherine Mallett, Matthew Abola, Sherrie Vassallo, Joseph Nguyen
BACKGROUND: Anterior cruciate ligament (ACL) injuries are among the most common knee injuries. Patient outcomes, rate of subsequent operations, and rate of subsequent ACL reconstruction following primary ACL reconstruction need to be evaluated. QUESTIONS/PURPOSES: This study was designed to answer the following questions: (1) What is the return to surgery (OR) rate following primary ACL reconstruction and (2) what is the revision ACL reconstruction rate? METHODS: Data was drawn from the Hospital for Special Surgery (HSS) ACL Registry...
July 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28690460/analysis-of-player-statistics-in-major-league-baseball-players-before-and-after-achilles-tendon-repair
#18
Bryan M Saltzman, Matthew W Tetreault, Daniel D Bohl, Danielle Tetreault, Simon Lee, Bernard R Bach
BACKGROUND: No currently available literature evaluates the effect of Achilles tendon repair on professional baseball players in the Major League Baseball (MLB). QUESTIONS/PURPOSES: The purpose of this study was to determine the impact of Achilles tendon rupture and repair on MLB players in terms of return to play and batting/fielding performance metrics. METHODS: Achilles tendon rupture data were retrospectively collected using information from the MLB disabled list, injury reports, MLB game summaries, player profiles, and publicly available news articles...
July 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28687386/amino-acid-composition-in-determination-of-collagen-origin-and-assessment-of-physical-factors-effects
#19
Marlena Gauza-Włodarczyk, Leszek Kubisz, Dariusz Włodarczyk
The amino acid composition of collagen is a characteristic feature of this protein. Collagen, irrespective of its origin, contains 19 amino acids, including hydroxyproline which does not occur in other proteins. Its atypical amino acid composition is characterized by high content of proline and glycine, as well as the absence of cysteine. This paper shows the comparison of qualitative composition of amino acids of fish skin (FS) collagen, bovine Achilles tendon (BAT) collagen, and bone collagen. Results demonstrate that FS collagen as well as BAT collagen contains no cysteine and significantly different amount of hydroxyproline...
July 4, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28683928/aging-leads-to-inferior-achilles-tendon-mechanics-and-altered-ankle-function-in-rodents
#20
A M Pardes, Z M Beach, H Raja, A B Rodriguez, B R Freedman, L J Soslowsky
Spontaneous rupture of the Achilles tendon is increasingly common in the middle aged population. However, the cause for the particularly high incidence of injury in this age group is not well understood. Therefore, the objective of this study was to identify age-specific differences in the Achilles tendon-muscle complex using an animal model. Functional measures were performed in vivo and tissues were harvested following euthanasia for mechanical, structural, and histological analysis from young, middle aged, and old rats...
June 20, 2017: Journal of Biomechanics
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