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https://www.readbyqxmd.com/read/29233633/dynamic-ct-angiography-for-the-diagnosis-of-patients-with-thoracic-outlet-syndrome-correlation-with-patient-symptoms
#1
Romain Gillet, Pedro Teixeira, Jean-Baptiste Meyer, Aymeric Rauch, Ariane Raymond, François Dap, Alain Blum
INTRODUCTION: Vasculo-nervous structures serving the upper limbs may be compressed as they pass through three areas: the inter-scalene triangle (IST), the costo-clavicular space (CCS) and the retropectoralis minor space (RMS). The diagnosis of thoracic outlet syndrome (TOS) is essentially clinical, but requires imaging to specify the site of compression, its grade and the existence of predisposing anatomical factors, in order to guide the treatment and eliminate the main differential diagnoses...
December 2, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29184705/phrenic-nerve-decompression-for-the-management-of-unilateral-diaphragmatic-paralysis-preoperative-evaluation-and-operative-technique
#2
Reid Hoshide, Justin Brown
Background: Unilateral diaphragmatic paralysis (UDP) can be a very disabling, typically causing shortness of breath and reduced exercise tolerance. We present a case of a surgical decompression of the phrenic nerve of a patient who presented with UDP, which occurred following cervical spine surgery. Methods: The workup for the etiology of UDP demonstrated paradoxical movement on "sniff test" and notably impaired pulmonary function tests. Seven months following the onset of the UDP, he underwent a surgical decompression of the phrenic nerve at the level of the anterior scalene...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/29121378/myopericytoma-of-the-neck-originating-in-the-middle-scalene-muscle-a-case-report
#3
Mark B Chaskes, John W Bishop, Matthew Bobinski, D Gregory Farwell
We report a case of myopericytoma of the neck. A 23-year-old woman noticed a small, nontender mass in her left supraclavicular fossa. The mass had grown over a period of 5 months, prompting her to seek evaluation. On examination, no motor or sensory deficits were present. Imaging suggested that a mass had originated in the middle scalene muscle. Computed-tomography-guided core needle biopsy demonstrated a spindle-cell neoplasm with smooth-muscle differentiation. Complete surgical excision was performed. Histopathologic and immunohistochemical evaluations of the tissue sample suggested a myopericytoma...
October 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/29106657/posterior-upper-rib-excision-for-neurogenic-thoracic-outlet-syndrome-feasibility-and-early-outcomes
#4
Kamran Aghayev, Ozcan Ciklatekerlio
BACKGROUND: There are several surgical treatment options for neurogenic thoracic outlet syndrome (n-TOS). However, the first rib has been shown to be the common denominator of all TOS forms and the degree of its resection has been shown to correlate with the long-term success. OBJECTIVE: To demonstrate the feasibility of posterior upper rib excision (PURE) and report early outcomes. METHODS: Nine patients presented with signs and symptoms of n-TOS...
July 6, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29059990/application-of-infrared-scanning-of-the-neck-muscles-to-control-a-cursor-in-human-computer-interface
#5
Seyede Mahya Safavi, Subramanian Meenakshi Sundaram, Ali Heydari Gorji, Neha Satishkumar Udaiwal, Pai H Chou
The feasibility of using infrared (IR) spectroscopy of the neck muscles in controlling a cursor in a 2-dimensional screen was assessed. The proposed technique utilizes two IR photoplethysmography sensors (λ = 940nm) to monitor the morphological changes of the Scalene and Sternocleidomastoid muscles. Since the reflection of the light has valuable information about the type of contraction, the direction of the movement (right/left, up/down) can be simply derived using two sensors. A MATLAB platform was developed in which a cursor moves using the recorded signal...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29050960/mapping-patterns-of-locoregional-recurrence-following-contemporary-treatment-with-radiation-therapy-for-breast-cancer-a-multi-institutional-validation-study-of-the-estro-consensus-guideline-on-clinical-target-volume
#6
Jee Suk Chang, Jeongshim Lee, Mison Chun, Kyung Hwan Shin, Won Park, Jong Hoon Lee, Jin Hee Kim, Won Sup Yoon, Ik Jae Lee, Juree Kim, Hye Li Park, Yong Bae Kim
BACKGROUND AND PURPOSE: To validate the ESTRO guideline on clinical target volume (CTV) delineation for breast cancer using a multi-centre dataset. MATERIALS AND METHODS: Patients with axial imaging of gross locoregional recurrence (LRR) were identified from 10 participating institutions. All patients received RT, albeit not to all regional node. The location of LRR was transferred to the corresponding area on representative axial computed tomography images and compared with ESTRO-CTV...
October 16, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29047484/characterizing-ice-particles-using-two-dimensional-reflections-of-a-lidar-beam
#7
M Goerke, Z Ulanowski, G Ritter, E Hesse, R R Neely, L Taylor, R A Stillwell, P H Kaye
We report a phenomenon manifesting itself as brief flashes of light on the snow's surface near a lidar beam. The flashes are imaged and interpreted as specular reflection patterns from individual ice particles. Such patterns have a two-dimensional structure and are similar to those previously observed in forward scattering. Patterns are easiest to capture from particles with well-defined horizontal facets, such as near-horizontally aligned plates. The patterns and their position can be used to determine properties such as ice particle shape, size, roughness, alignment, and altitude...
July 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/28989623/endor-characterization-of-an-iron-alkene-complex-provides-insight-into-a-corresponding-organometallic-intermediate-of-nitrogenase
#8
Masaki Horitani, Katarzyna Grubel, Sean F McWilliams, Bryan D Stubbert, Brandon Q Mercado, Ying Yu, Prabhuodeyara M Gurubasavaraj, Nicholas S Lees, Patrick L Holland, Brian M Hoffman
A bio-organometallic intermediate, denoted PA, was previously trapped during the reduction of propargyl alcohol to allyl alcohol (AA) by nitrogenase, and a similar one was trapped during acetylene reduction, representing foundational examples of alkene binding to a metal center in biology. ENDOR spectroscopy led to the conclusion that these intermediates have η(2) binding of the alkene, with the hydrogens on the terminal carbon structurally/magnetically equivalent and related by local mirror symmetry. However, our understanding of both the PA intermediate, and of the dependability of the ENDOR analysis on which this understanding was based, was constrained by the absence of reference iron-alkene complexes for EPR/ENDOR comparison...
September 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28943009/midterm-and-long-term-follow-up-in-competitive-athletes-undergoing-thoracic-outlet-decompression-for-neurogenic-thoracic-outlet-syndrome
#9
William Shutze, Brad Richardson, Ryan Shutze, Kimberly Tran, Allen Dao, Gerald O Ogola, Allan Young, Greg Pearl
BACKGROUND: Neurogenic thoracic outlet syndrome (NTOS) results from compression of the brachial plexus by the clavicle, first rib, and scalene muscles and may develop secondary to repetitive motion of the upper extremity. Athletes routinely perform repetitive motions, and sports requiring significant arm and shoulder use may put the participant at increased risk for NTOS. Competitive athletes who develop NTOS may require first rib resection and scalenectomy (FRRS) for symptomatic relief...
December 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28940670/deoxygenation-of-inspiratory-muscles-during-cycling-hyperpnoea-and-loaded-breathing-in-health-and-disease-a-systematic-review
#10
REVIEW
Takako Tanaka, Nada Basoudan, Luana T Melo, Lisa Wickerson, Laurent J Brochard, Ewan C Goligher, W Darlene Reid
Assessing inspiratory muscle deoxygenation and blood flow can provide insight into anaerobic stress, recruitment strategies and mechanisms of inspiratory muscle limitation. Therefore, this review aimed to synthesize measurements of inspiratory muscle oxyhaemoglobin (O2 Hb), deoxyhaemoglobin (HHb), blood volume and flow of the inspiratory muscles acquired via near-infrared spectroscopy (NIRS) during cycling, hyperpnoea and loaded breathing in healthy non-athletes, healthy athletes and patients with chronic obstructive pulmonary disease (COPD) or chronic heart failure (CHF)...
September 22, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28928918/arterial-thoracic-outlet-syndrome-secondary-to-hypertrophy-of-the-anterior-scalene-muscle
#11
Erion Qaja, Sara Honari, Robert Rhee
Thoracic outlet syndrome (TOS) was first introduced in literature by Peet et al. in 1956. Since then is has been studied extensively and subcategorized into at least four closely related syndrome. Neurogenic TOS due to the compression of brachial plexus, arterial TOS in cases of compression of the subclavian artery, venous TOS in cases of compression of the subclavian vein, and non-specific type of TOS. Neurogenic TOS is by far the most common consisting of 95% of the cases, followed by venous and lastly arterial...
August 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28890403/sex-differences-in-respiratory-muscle-activation-patterns-during-high-intensity-exercise-in-healthy-humans
#12
Reid A Mitchell, Michele R Schaeffer, Andrew H Ramsook, Sabrina S Wilkie, Jordan A Guenette
Although women experience greater ventilatory constraints and have a higher work of breathing during exercise, they are less susceptible to diaphragm fatigue compared to men. The mechanisms for diaphragmatic fatigue resistance in women is unknown but may be related to sex differences in respiratory muscle recruitment. Accordingly, the purpose of this study was to determine if electromyography (EMG) of the diaphragm (EMGdi) and extra-diaphragmatic inspiratory muscles differ between sexes during exercise. Forty subjects (21M:19F) completed a constant load cycling test at 85% of maximum work rate until exhaustion, while instrumented with an oesophageal electrode catheter to measure EMGdi and surface electrodes to measure EMG of the sternocleidomastoid (EMGscm) and scalene (EMGsca) muscles...
September 7, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28823081/neck-inspiratory-muscle-activation-patterns-during-well-controlled-inspiration
#13
Sohei Washino, Hiroaki Kanehisa, Yasuhide Yoshitake
PURPOSE: Surprisingly, the activation characteristics of the neck inspiratory muscles as a function of key inspiratory mechanical parameters have yet to be demonstrated experimentally under well-controlled conditions. This study aimed to elucidate the muscle activation patterns of the neck inspiratory muscles by strictly controlling flow rate and lung volume. METHODS: Thirteen healthy subjects matched their inspiratory flow rate at approximately 20-100% of peak flow rate (PFR) as steady as possible during inspiration...
October 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28735950/associations-between-clinical-diagnostic-criteria-and-pretreatment-patient-reported-outcomes-measures-in-a-prospective-observational-cohort-of-patients-with-neurogenic-thoracic-outlet-syndrome
#14
Joshua Balderman, Katherine Holzem, Beverly J Field, Michael M Bottros, Ahmmad A Abuirqeba, Chandu Vemuri, Robert W Thompson
OBJECTIVE: Neurogenic thoracic outlet syndrome (NTOS) is caused by dynamic compression of the brachial plexus at the level of the supraclavicular scalene triangle or the subcoracoid (pectoralis minor) space, or both. The purpose of this study was to characterize relationships between 14 clinical diagnostic criteria (CDC) and seven pretreatment patient-reported outcomes measures (PROMs) in a prospective cohort of patients with NTOS. METHODS: There were 183 new patient referrals between July 1 and December 31, 2015, with 150 (82%) meeting an established set of predefined CDC for NTOS...
August 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28716694/-isolated-long-thoracic-nerve-palsy-more-than-meets-the-eye
#15
Andrés A Maldonado, Scott L Zuckerman, B Matthew Howe, Michelle L Mauermann, Robert J Spinner
INTRODUCTION: Two main hypotheses have been proposed for the pathophysiology of long thoracic nerve (LTN) palsy: nerve compression and nerve inflammation. We hypothesized that critical reinterpretation of electrodiagnostic (EDX) studies and MRIs of patients with a diagnosis of non-traumatic isolated LTN palsy could provide insight into the pathophysiology and, potentially, the treatment. MATERIAL AND METHODS: A retrospective review was performed of all patients with a diagnosis of non-traumatic isolated LTN palsy and an EDX and brachial plexus or shoulder MRI studies performed at our institution...
September 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28678290/second-order-directed-positioning-of-nanoparticles-induced-by-the-main-terminal-meniscus-shape-in-irregular-template-cavities
#16
Mohamed Asbahi, Zhaogang Dong, FuKe Wang, Mohammad S M Saifullah, Joel K W Yang, Karen S L Chong
Directed self-assembly of nanoparticles using topographical templates has demonstrated great capabilities of ordering particles at their maximum packing fraction resulting from template confinement effects and free energy minimization. However, to self-assemble nanostructures at a lower packing fraction with a precise control over particle's positioning is challenging due to the high entropy of such a system. Here, by fabricating templates of irregular cavities together with appropriate choice of solvent, we demonstrate the positioning of 8 nm Au nanoparticles within individual cavities at a low filling factor...
July 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28677632/ultrasonographic-diagnosis-of-thoracic-outlet-syndrome-secondary-to-brachial-plexus-piercing-variation
#17
Vanessa Leonhard, Gregory Caldwell, Mei Goh, Sean Reeder, Heather F Smith
Structural variations of the thoracic outlet create a unique risk for neurogenic thoracic outlet syndrome (nTOS) that is difficult to diagnose clinically. Common anatomical variations in brachial plexus (BP) branching were recently discovered in which portions of the proximal plexus pierce the anterior scalene. This results in possible impingement of BP nerves within the muscle belly and, therefore, predisposition for nTOS. We hypothesized that some cases of disputed nTOS result from these BP branching variants...
July 4, 2017: Diagnostics
https://www.readbyqxmd.com/read/28671972/diaphragm-a-mnemonic-to-describe-the-work-of-breathing-in-patients-with-respiratory-failure
#18
Aiman Tulaimat, William E Trick
BACKGROUND: The assessment of the work of breathing in the definitions of respiratory failure is vague and variable. OBJECTIVE: Identify a parsimonious set of signs to describe the work of breathing in hypoxemic, acutely ill patients. METHODS: We examined consecutive medical ICU patients receiving oxygen with a mask, non-invasive ventilation, or T-piece. A physician inspected each patient for 10 seconds, rated the level of respiratory distress, and then examined the patient for vital signs and 17 other physical signs...
2017: PloS One
https://www.readbyqxmd.com/read/28626314/effect-of-sleep-posture-on-neck-muscle-activity
#19
Won-Hwee Lee, Min-Seok Ko
[Purpose] This study investigated the effect of sleep posture on neck muscle activity. [Subjects and Methods] The study recruited 20 healthy subjects, who were positioned in three supine sleeping positions: both hands at sides, both hands on the chest, and dominant hand on the forehead. The activities of the scalene and upper trapezius muscles bilaterally were measured by surface electromyography. [Results] The upper trapezius and scalene muscle activity on the right side was significantly greater in the supine with dominant hand on the forehead position than in the other positions...
June 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28626302/the-immediate-effect-of-diaphragm-taping-with-breathing-exercise-on-muscle-tone-and-stiffness-of-respiratory-muscles-and-spo2-in-stroke-patient
#20
Joong-San Wang, Kyun-Hee Cho, Shin-Jun Park
[Purpose] This study aimed to examine the immediate effects of diaphragm taping with breathing exercise on the tone and stiffness in the respiratory muscles of patient with stroke. [Subjects and Methods] A total of 28 subjects, 14 in the diaphragm taping with breathing exercise group and 14 in the breathing exercise group, were administered respective intervention methods. Subsequently, the muscle tone and stiffness in upper trapezius, scalene, external oblique abdominal and ractus abdominis muscle of both the respiratory muscles were measured...
June 2017: Journal of Physical Therapy Science
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