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Compression, recovery,

Puneet Kapur, Melanie Baimel, Jordan Chenkin
Left ventricular outflow tract pseudoaneurysms are a rare but life-threatening disorder, often caused by complications of cardiac surgery or myocardial infarction. We present a case report of a patient with no prior risk factors who presented with a six-month history of progressive exertional dyspnea, bilateral leg swelling and cough. Point-of-care ultrasound revealed an unexpected outpouching of the left ventricle. He was diagnosed with a left ventricular outflow tract pseudoaneurysm and subsequently went into cardiogenic shock secondary to extension of pseudoaneurysm causing extrinsic compression of the coronary arteries...
March 16, 2018: CJEM
Dominique Laniel, Gunnar Weck, Gabriel Gaiffe, Gaston Garbarino, Paul Loubeyre
Polynitrogen compounds have been actively pursued driven by their potential as ultra-high performing propellants or explosives. Despite remarkable breakthroughs over the past two decades, the two figures of merit for a compelling material, namely a large fraction of nitrogen by weight and a bulk stability at ambient conditions, have not been achieved yet. Here, we report the synthesis of a lithium pentazolate solid by compressing and laser-heating lithium embedded in molecular N2 around 45 GPa along with its recovery at ambient conditions...
March 13, 2018: Journal of Physical Chemistry Letters
Avinash Rao, Hesham Soliman, Mayank Kaushal, Oleysa Motovylak, Aditya Vedantam, Matthew D Budde, Brian Schmit, Marjorie Wang, Shekar N Kurpad
BACKGROUND: Fractional anisotropy (FA) of the high cervical cord correlates with upper limb function in acute cervical cord injury. We investigated the correlation between preoperative FA at the level of maximal compression and functional recovery in a group of patients after decompressive surgery for cervical spondylotic myelopathy (CSM). OBJECTIVE: To determine the usefulness of FA as a biomarker for severity of CSM and as a prognostic biomarker for improvement after surgery...
February 23, 2018: Neurosurgery
Raoul Saggini, Maurizio Migliorini, Simona Maria Carmignano, Emilio Ancona, Chiara Russo, Rosa Grazia Bellomo
Background: The cause of heel pain among soccer players is multifactorial and is related to repetitive microtrauma due to impact forces involving technical moves, but also the playground, the exercise mode, the recovery time, the climatic conditions and the footwear used. Aim: To investigate the aetiology of plantar heel pain of soccer players with the objective of proposing an example of guidelines for treatment. Methods: We investigated the prevalence and characteristics of inferior heel pain of 1473 professional, semiprofessional and amateur players...
2018: BMJ Open Sport & Exercise Medicine
Vinayak Narayan, Nasser Mohammed, Amey R Savardekar, Devi Prasad Patra, Anil Nanda
INTRODUCTION: Spinal tuberculosis [TB] is a common infectious disease prevalent in developing countries and a rising disaster in developed countries. The association of tuberculosis with spondylolisthesis is rarely reported in literature. The aim of our review is to analyse the clinical features and radiologic characteristics of TB spondylolisthesis along with providing a concise update on its surgical management, based on current literature. METHODS: A systematic review is performed after conducting a thorough search in the PubMed database...
March 8, 2018: World Neurosurgery
Carmelo Panetta, Sunil Rao
OBJECTIVES: Study a novel method using manual pressure on a hemostatic pad and hemoband for ulnar compression as a potential alternative for radial sheath removal. BACKGROUND: The standard for transradial access site (TRA) sheath removal requires an inflatable pressure band over the radial artery and recently a band over the ulnar artery to reduce complications. We present a novel technique using a SoftSeal®-STF hemostatic pad over the radial artery combined with a hemoband over the ulnar artery after sheath removal...
March 9, 2018: Catheterization and Cardiovascular Interventions
Amanda M Heapy, Martin D Hoffman, Heidie H Verhagen, Samuel W Thompson, Pavitra Dhamija, Fiona J Sandford, Mary C Cooper
Manual therapy (MT) and intermittent pneumatic compression (IPC) are recovery methods used by endurance athletes with little evidence supporting effectiveness. This randomized controlled trial evaluated effectiveness of four daily post-race treatments of a specific MT protocol and IPC compared with supine rest on recovery following an ultramarathon among 56 ultramarathoners. Groups were comparable across all characteristics examined, including post-race plasma creatine kinase concentration. Subject completed timed 400 m runs before the race and on days three, five, seven and 14 post- race, and also provided muscle pain and soreness ratings and fatigue scores immediately before and after treatments, and during the 14 days post- race...
March 7, 2018: Research in Sports Medicine
Shashikant L Sholapurkar
The survival of cardiotocography (CTG) as a tool for intrapartum fetal monitoring seems threatened somewhat unjustifiably and unwittingly despite the absence of better alternatives. Fetal heart rate (FHR) decelerations are center-stage (most important) in the interpretation of CTG with maximum impact on three-tier classification. The pattern-discrimination of FHR decelerations is inexorably linked to their nomenclature. Unscientific or flawed nomenclature of decelerations can explain the dysfunctional CTG interpretation leading to errors in detection of acidemic fetuses...
April 2018: Journal of Clinical Medicine Research
Colas Schretter, Shaun Bundervoet, David Blinder, Ann Dooms, Jan D'hooge, Peter Schelkens
Upcoming phased-array 2-D sensors will soon enable fast high-definition 3-D ultrasound imaging. Currently, the communication of raw radio-frequency (RF) channel data from the probe to the computer for digital beamforming is a bottleneck. For reducing the amount of transferred data samples, this paper investigates the design of an adapted sparse sampling technique for image reconstruction inspired by the compressed sensing framework. Echo responses from isolated points are generated using a physically based simulation of ultrasound wave propagation through tissues...
March 2018: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Chen Song, Aosen Wang, Feng Lin, Mohammadnabi Asmani, Ruogang Zhao, Zhanpeng Jin, Jian Xiao, Wenyao Xu
As a micro-engineered biomimetic system to replicate key functions of living organs, organ-on-a-chip (OC) technology provides a high-throughput model for investigating complex cell interactions with both high temporal and spatial resolutions in biological studies. Typically, microscopy and high-speed video cameras are used for data acquisition, which are expensive and bulky. Recently, compressed sensing (CS) has increasingly attracted attentions due to its extremely low-complexity structure and low sampling rate...
March 2018: IEEE Journal of Biomedical and Health Informatics
Gen-Long Jiao, Yong-Bao Fan, De-Jun Deng, Jian-Li Shao, Guo-Dong Sun, Zhi-Zhong Li
OBJECTIVE: To analyze the clinical effect of spinal cord decompression and lavage therapy on chronic cervical spinal cord injury and explore the possible mechanism. METHODS: Fifty-seven patients with chronic cervical spinal cord injury treated in our hospital from January, 2008 to January, 2015 were enrolled, including 17 with multilevel cervical disc herniation, 25 with long segmental ossification of the posterior longitudinal ligament, 13 with hypertrophy or calcification of neck ligamentum flavum, and 2 with old cervical fractures...
February 20, 2018: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
Zohreh Arabshahi, Isaac Oluwaseun Afara, Hayley Ruscoe Moody, Karsten Schrobback, Jamal Kashani, Nadine Fischer, Adekunle Oloyede, Travis Jacob Klein
The conventional mechanical properties of articular cartilage, such as compressive stiffness, have been shown to have limited capacity to distinguish visually normal from degraded cartilage samples. In this study, a new mechanical indentation framework for assessing functional properties of articular cartilage during loading/unloading, i.e. deformation and recovery, was established. The capacity of a ring-shaped indenter integrated with an ultrasound transducer to distinguish mechanically intact from proteoglycan-depleted tissue was investigated...
February 23, 2018: Journal of the Mechanical Behavior of Biomedical Materials
Leo Nherera, Paul Trueman, Alan Horner, Tracy Watson, Alan J Johnstone
BACKGROUND: Intertrochanteric hip fractures are common and devastating injuries especially for the elderly. Surgical treatment is the optimal strategy for managing intertrochanteric fractures as it allows early rehabilitation and functional recovery. The relative effects of internal fixation strategies for intertrochanteric fracture after operation remain limited to relatively small studies which create uncertainty in attempts to establish evidence-based best practice. METHODS: We conducted a systematic review and meta-analysis of randomised controlled trials (RCTs) and observational studies to assess the clinical effectiveness of two commonly used intramedullary devices: a twin screw integrated cephalomedullary nail (InterTAN) versus a single screw cephalomedullary nail (proximal femoral nail antirotation) in patients with intertrochanteric fractures...
March 2, 2018: Journal of Orthopaedic Surgery and Research
Qiang Chen, Qi Liu, Yan Suo, Qingping Xie
RATIONALE: Abdominal wall defects are common after tumor resection. PATIENT CONCERNS: We report an 83-year-old male patient with recurrent tumors in his abdomen, and who had an incision wound that could not be directly closed. Mesh was not suitable because the wound was infected. DIAGNOSES: Abdominal wall defect result from the resection of recurrent tumor. INTERVENTIONS: We carried out a vascularized ribs-pleural transfer operation...
March 2018: Medicine (Baltimore)
Lin Jing, Hongling Li, Jinjun Lin, Roland Yingjie Tay, Siu Hon Tsang, Edwin Hang Tong Teo, Alfred Iing Yoong Tok
Vertically aligned carbon nanotube (CNT) arrays have been recognized as promising cushion materials because of their superior thermal stability, remarkable compressibility and viscoelastic characteristics. However, most of the previously reported CNT arrays still suffer from permanent shape deformation at only moderate compressive strains, which considerably restricts their practical applications. Here, we demonstrate a facile strategy of fabricating super-compressible coaxial CNT@graphene (CNT@Gr) arrays by using a two-step route involving encapsulating polymer layers onto plastic CNT arrays and subsequent annealing processes...
February 28, 2018: ACS Applied Materials & Interfaces
I David Kaye, Alex R Vaccaro
Spinal cord injury can be a life-altering trauma for patients and can be costly to patients and society alike. Generally recognized as biphasic, these injuries have both primary and secondary drivers. Although the primary insult is largely unavoidable, prevention of secondary injury mechanisms-and the resultant cascade-has been a target of substantial research. Continued spinal cord compression has been recognized as one of several deleterious secondary mechanisms, and decompressive and stabilization surgery has been routinely used for neuroprotection in this setting...
2018: Spinal Cord Series and Cases
Jamie Lynn White, Naomi J Walker, Jerry C Hu, Dori Borjesson, Kyriacos A Athanasiou
Joint injury is a common cause of premature retirement for the human and equine athlete alike. Implantation of engineered cartilage offers the potential to increase the success rate of surgical intervention and hasten recovery times. Mesenchymal stem cells (MSCs) are a particularly attractive cell source for cartilage engineering. While bone marrow-derived MSCs (BM-MSCs) have been most extensively characterized for musculoskeletal tissue engineering, studies suggest cord blood MSCs (CB-MSCs) may elicit a more robust chondrogenic phenotype...
February 25, 2018: Tissue Engineering. Part A
José M Zamora, Ronald Marquez, Ana M Forgiarini, Dominique Langevin, Jean-Louis Salager
When surfactants adsorb at liquid interfaces, they not only decrease the surface tension, they confer rheological properties to the interfaces. There are two types of rheological parameters associated to interfacial layers: compression and shear. The elastic response is described by a storage modulus and the dissipation by a loss modulus or equivalently a surface viscosity. Various types of instruments are available for the measurements of these coefficients, the most common being oscillating pendent drops instruments and rheometers equipped with bicones...
February 16, 2018: Journal of Colloid and Interface Science
Jianping Wang, Jingfeng Li, Lin Cai
OBJECTIVES: The purpose of this study is to evaluate the clinical effects of cervical spinal cord injury without fracture and dislocation (CSCIWFD) treatment in a medium to long-term follow-up study. The clinical treatment of CSCIWFD is also discussed. METHODS: A consecutive series of 42 CSCIWFD patients with complete follow-up data were retrospectively analyzed. Among these patients, 9 received conservative treatment and 33 underwent surgical treatment from June 2009 to March 2013...
February 21, 2018: World Neurosurgery
Robert G Kowalski, Alan H Weintraub, Benjamin A Rubin, Donald J Gerber, Andrew J Olsen
OBJECTIVE Posttraumatic hydrocephalus (PTH) is a frequent sequela of traumatic brain injury (TBI) and complication of related cranial surgery. The roles of PTH and the timing of cerebrospinal fluid (CSF) shunt placement in TBI outcome have not been well described. The goal of this study was to assess the impact of hydrocephalus and timing of ventriculoperitoneal (VP) shunt placement on outcome during inpatient rehabilitation after TBI. METHODS In this cohort study, all TBI patients admitted to Craig Hospital between 2009 and 2013 were evaluated for PTH, defined as ventriculomegaly, and hydrocephalus symptoms, delayed or deteriorating recovery, or elevated opening pressure on lumbar puncture...
February 23, 2018: Journal of Neurosurgery
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