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https://www.readbyqxmd.com/read/28537994/changes-in-gait-parameters-after-femoral-derotational-osteotomy-in-cerebral-palsy-patients-with-medial-femoral-torsion
#1
Ha Yong Kim, Yong Han Cha, Jae Yong Byun, Young Sub Chun, Won Sik Choy
Medial femoral torsion (MFT) is a common pathologic gait in cerebral palsy (CP) children that can be corrected by femoral derotational osteotomy (FDO). It is not clearly known as to how much various gait parameters change after FDO. The aim of this study was to quantify changes in gait parameters after FDO. The study group included 19 young CP patients (28 limbs, age<20 years, average age: 13.2 years) with symptomatic MFT, treated with distal FDO. The study group was divided into two groups: the unilateral FDO group (UG) and the bilateral FDO group (BG)...
May 19, 2017: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/28533596/the-ratio-of-medial-and-lateral-hamstring-muscle-thickness-does-not-correlate-with-the-lateral-tibial-rotation-angle-in-the-standing-position-in-healthy-young-adults
#2
Dong-Soo Lee, Sung-Dae Choung, Seung-Won Lee, Hye Rim Suh, Jae-Hoon Shim
[Purpose] To investigate the relationship between the lateral tibial rotation angle during knee joint flexion and the medial and lateral hamstring muscle thickness ratio during knee joint extension while resting, doing nothing, in upright standing position. The lateral tibial torsion is an important factor of orthopedic knee joint diseases as well as other weight bearing joint diseases such as osteoarthritis, meniscus syndrome, anterior cruciate ligament rupture, etc. [Subjects and Methods] Thirty healthy young adults participated in this study...
April 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28530063/-rare-case-of-huge-omental-dermoid
#3
Ilan Atlas, Izhar Ben Shlomo, Yasmin Abbas
Ovarian dermoid cyst is a benign germ cell tumor usually occurring during fertile age. In contrast, giant omental dermoid is extremely rare and is thought to originate from ovarian torsion, detachment and omental implantation. We present a case of a 73 year old patient with 26 cm giant omental dermoid weighing more than 6 kg. During surgery, aspiration of the cystic part facilitated the delivery of the big mass through a relative small abdominal incision.
October 2016: Harefuah
https://www.readbyqxmd.com/read/28529795/crystal-structure-of-isopropyl-2-hy-droxy-2-phenyl-acetate-a-pharmacopoeia-reference-standard
#4
Ivan Isaiev, Svitlana Shishkina, Igor Ukrainets, Elena Bevz
The title compound, C11H14O3, is used as a pharmacopoeia reference standard for determining impurities in the drug Pregabalin, used for the treatment of epilepsy and diabetic neuropathic pain. The mol-ecule is far from being planar, with the dihedral angle between the planes of the aromatic ring and the carboxyl fragment (O-C=O) being 76.1 (6)°. The isopropyl substituent is located in a synperiplanar position relative to the C=O bond and is turned so that the C-O-C-H torsion angle is -43.7°. In the crystal, bifurcated O-H⋯(O,O) hydrogen bonds, enclosing R1(2)(5) ring motifs, lead to the formation of chains propagating along the c-axis direction...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28529787/crystal-structure-of-2-chloro-1-3-bis-2-6-diiso-propyl-phen-yl-1-3-2-di-aza-phospho-lidine-2-oxide
#5
Alex J Veinot, Arthur D Hendsbee, Jason D Masuda
The title compound, C26H38ClN2OP, was synthesized by reacting phosphoryl chloride with N,N'-bis-(2,6-diiso-propyl-phen-yl)ethane-1,2-di-amine in the presence of N-methyl-morpholine which acted as an auxilliary base to quench the HCl released as a by-product. The resultant N-heterocyclic phosphine five-membered ring adopts a half-chair conformation and features a tetra-coordinate P atom ligated by the chelating di-amine [P-N = 1.6348 (14) and 1.6192 (14) Å], one double-bonded O atom [P1-O1 = 1.4652 (12) Å] and one Cl atom [P1-Cl1 = 2...
May 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28529430/mechanical-behavior-and-wall-remodeling-of-blood-vessels-under-axial-twist
#6
Han Hai-Chao, Liu Qin, Jiang Zong-Lai
Blood vessels are often subjected to axial torsion (or twist) due to body movement or surgery. However, there are few studies on blood vessel under twist. This review first summarizes the clinical observation on the twist of blood vessels and then presents what we know about the mechanical behaviors of blood vessel under twist, including the constitutive models. The state of art researches on the remodeling of blood vessels under twist via ex vivo organ culture, in vivo animal experiments, and mathematical model simulations are further discussed...
August 2016: Yi Yong Sheng Wu Li Xue
https://www.readbyqxmd.com/read/28528057/drains-and-blushes-a-case-of-impaired-venous-drainage-mimicking-pulmonary-torsion
#7
Nazia Alvi, Raju Z Abraham, Philip Alexander, Thomas Betlej, Arun Jagannathan
A 47-year-old woman underwent elective right upper lobectomy with pneumopexy for adenocarcinoma. On postoperative day 2, she had tachycardia, and her chest radiograph, bronchoscopy, and computed tomography chest scan were suspicious for pulmonary torsion. She underwent emergent thoracotomy, and the right middle lobe was not torsed; it was purple, engorged, and not ventilated. The patient did well after right middle lobectomy. We suspect compromised middle lobe pulmonary venous drainage due to angulation after compensatory expansion...
June 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28527852/cyclic-and-torsional-fatigue-resistance-of-reciprocating-single-files-manufactured-by-different-nickel-titanium-alloys
#8
Murilo P Alcalde, Mario Tanomaru-Filho, Clovis M Bramante, Marco Antonio H Duarte, Juliane Maria Guerreiro-Tanomaru, Jader Camilo-Pinto, Marcus Vinicius Reis Só, Rodrigo Ricci Vivan
INTRODUCTION: The aim of this study was to evaluate the cyclic and torsional fatigue resistance of the following reciprocating single-file systems: ProDesign R 25.06 (Easy Equipamentos Odontológicos, Belo Horizonte, Brazil), Reciproc R25 (VDW GmbH, Munich, Germany), and Unicone L25 (Medin SA, Nové Město in Moravě, Czech Republic). METHODS: Sixty instruments of the ProDesign R, Reciproc R25, and Unicone L25 systems (n = 20) were used. Cyclic fatigue resistance was tested measuring the time to failure in an artificial stainless steel canal with a 60° angle and a 5-mm radius of curvature (n = 10)...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28527721/indicators-and-outcomes-of-transfer-to-tertiary-pediatric-hospitals-for-patients-with-testicular-torsion
#9
Janae Preece, Christina Ching, Katelyn Yackey, Venkata Jayanthi, Daryl McLeod, Seth Alpert, Daniel DaJusta
INTRODUCTION: Testicular torsion threatens testicular viability with increased risk of loss with delayed management. Still, healthy adolescents continue to be transferred from community hospitals to tertiary hospitals for surgical management for torsion even though adult urologists may be available. We sought to determine reasons behind patient transfer and to evaluate whether transfer to tertiary centers for testicular torsion leads to increased rates of testicular loss. MATERIALS AND METHODS: A retrospective chart review was performed for patients presenting to our free-standing pediatric tertiary care facility with surgically confirmed testicular torsion during the 5-year period between January 2011 and January 2016...
April 27, 2017: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/28527463/sub-doppler-infrared-spectroscopy-of-ch2oh-radical-in-a-slit-supersonic-jet-vibration-rotation-tunneling-dynamics-in-the-symmetric-ch-stretch-manifold
#10
Michael D Schuder, Fang Wang, Chih-Hsuan Chang, David J Nesbitt
The sub-Doppler CH-symmetric stretch (ν3) infrared absorption spectrum of a hydroxymethyl (CH2OH) radical is observed and analyzed with the radical formed in a slit-jet supersonic discharge expansion (Trot = 18 K) via Cl atom mediated H atom abstraction from methanol. The high sensitivity of the spectrometer and reduced spectral congestion associated with the cooled expansion enable first infrared spectroscopic observation of hydroxymethyl transitions from both ± symmetry tunneling states resulting from large amplitude COH torsional motion...
May 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28526174/twist-buckling-of-veins-under-torsional-loading
#11
Justin R Garcia, Arnav Sanyal, Fatemeh Fatemifar, Mohammad Mottahedi, Hai-Chao Han
Veins are often subjected to torsion and twisted veins can hinder and disrupt normal blood flow but their mechanical behavior under torsion is poorly understood. The objective of this study was to investigate the twist deformation and buckling behavior of veins under torsion. Twist buckling tests were performed on porcine internal jugular veins (IJVs) and human great saphenous veins (GSVs) at various axial stretch ratio and lumen pressure conditions to determine their critical buckling torques and critical buckling twist angles...
May 5, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28523198/uterine-fibroid-torsion-during-pregnancy-a-case-of-laparotomic-myomectomy-at-18-weeks-gestation-with-systematic-review-of-the-literature
#12
Annachiara Basso, Mariana Rita Catalano, Giuseppe Loverro, Serena Nocera, Edoardo Di Naro, Matteo Loverro, Mariateresa Natrella, Salvatore Andrea Mastrolia
Uterine myomas are the most common benign growths affecting female reproductive system, occurring in 20-40% of women, whereas the incidence rate in pregnancy is estimated from 0.1 to 3.9%. The lower incidence in pregnancy is due to the association with infertility and low pregnancy rates and implantation rates after in vitro fertilization treatment. Uterine myomas, usually, are asymptomatic during pregnancy. However, occasionally, pedunculated fibroids torsion or other superimposed complications may cause acute abdominal pain...
2017: Case Reports in Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28523072/delayed-endothelial-progenitor-cell-therapy-promotes-bone-defect-repair-in-a-clinically-relevant-rat-model
#13
Brent D Bates, Charles Godbout, David J Ramnaraign, Emil H Schemitsch, Aaron Nauth
The repair of segmental bone defects remains a significant challenge for orthopaedic surgeons. Endothelial progenitor cells (EPCs) have successfully promoted the repair of acute defects in animal models; however, the ability of EPCs to induce the repair of chronic nonhealing defects, such as those often encountered clinically, has not been investigated. Therefore, the purpose of this study was to investigate the ability of EPCs delivered in delayed fashion to induce the repair of nonhealing defects in a clinically relevant model...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28522755/increased-left-ventricular-extracellular-volume-and-enhanced-twist-function-in-type-1-diabetic-individuals
#14
Zainisha Vasanji, Ronald J Sigal, Neil Derek Eves, Debra L Isaac, Matthias G Friedrich, Kelvin Chow, Richard B Thompson
Individuals with type 1 diabetes (T1D) characteristically have high glycemic levels that over time can result in reactive fibrosis and abnormalities in myocardial function. T1 mapping with magnetic resonance imaging (MRI) can estimate the extent of reactive fibrosis by measurement of the extracellular volume fraction (ECV). The extent of alterations in the ECV and associated changes in left ventricular (LV) function and morphology in individuals with T1D is unknown. Fourteen individuals with long-term T1D and fourteen sex-, age-, and body mass index-matched controls without diabetes underwent MRI measurement of myocardial T1 and ECV values as well as LV function and morphology...
May 18, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28515620/stationary-acceleration-of-frenet-curves
#15
Nemat Abazari, Martin Bohner, Ilgin Sağer, Yusuf Yayli
In this paper, the stationary acceleration of the spherical general helix in a 3-dimensional Lie group is studied by using a bi-invariant metric. The relationship between the Frenet elements of the stationary acceleration curve in 4-dimensional Euclidean space and the intrinsic Frenet elements of the Lie group is outlined. As a consequence, the corresponding curvature and torsion of these curves are computed. In Minkowski space, for the curves on a timelike surface to have a stationary acceleration, a necessary and sufficient condition is refined...
2017: Journal of Inequalities and Applications
https://www.readbyqxmd.com/read/28514960/segmental-testicular-infarction-a-case-report
#16
Tine Smets, Gina Reichman, Dirk P J Michielsen
BACKGROUND: Segmental testicular infarction is a very rare condition, which can mimic a testicular torsion or testicular cancer. Correct diagnosis is difficult but it is important to avoid unnecessary radical treatment. CASE PRESENTATION: We report a clinical case of a 36-year-old white man who presented at our emergency department with subacute testicular pain. A urine analysis, Doppler ultrasound, surgical exploration, blood analysis, and magnetic resonance imaging were performed to diagnose his condition, to exclude a testicular torsion, and to raise confidence in its non-malignancy...
May 18, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28511550/ct-features-in-surgically-proven-cases-of-ovarian-torsion-a-pictorial-review
#17
Sunita Dhanda, Swee Tian Quek, Ying Ting Mok, Clement Yong Hsiang Rong, Yuik Sing Eric Ting, Pooja Jagmohan, Bernard Wee
Ovarian torsion is a surgical emergency characterized by a partial or complete rotation of the ovarian vascular pedicle, causing obstruction to venous outflow followed by arterial inflow. Clinically, ovarian torsion frequently mimics other causes of acute pelvic pain such as appendicitis, diverticulitis, renal colic etc. Ultrasonography (US) is the first line imaging modality of choice for evaluation of ovarian torsion. MRI is useful as a problem solving tool in patients with equivocal or non diagnostic US studies...
May 16, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28511233/-diagnostic-imaging-in-cases-of-acute-scrotum
#18
Natalie Ring, Gundula Staatz
Acute scrotum is one of the most common urologic emergencies in children and adolescents. This condition involves acute testicular pain, which is often accompanied by scrotal swelling and erythema. It is most important to distinguish between cases that require immediate surgery and those that can be treated conservatively. As patient history and physical findings may not always be unequivocal, ultrasound with Colour-Coded Doppler Sonography is the imaging modality of choice for further evaluation. Testicular torsion and other differential diagnoses such as epididymitis, appendiceal torsion, intratesticular haematoma after trauma, or complicated inguinal hernia have to be considered...
May 16, 2017: Aktuelle Urologie
https://www.readbyqxmd.com/read/28510225/controlling-gene-expression-by-dna-mechanics-emerging-insights-and-challenges
#19
REVIEW
David Levens, Laura Baranello, Fedor Kouzine
Transcription initiation is a major control point for the precise regulation of gene expression. Our knowledge of this process has been mainly derived from protein-centric studies wherein cis-regulatory DNA sequences play a passive role, mainly in arranging the protein machinery to coalesce at the transcription start sites of genes in a spatial and temporal-specific manner. However, this is a highly dynamic process in which molecular motors such as RNA polymerase II (RNAPII), helicases, and other transcription factors, alter the level of mechanical force in DNA, rather than simply a set of static DNA-protein interactions...
September 2016: Biophysical Reviews
https://www.readbyqxmd.com/read/28510218/controlling-gene-expression-by-dna-mechanics-emerging-insights-and-challenges
#20
REVIEW
David Levens, Laura Baranello, Fedor Kouzine
Transcription initiation is a major control point for the precise regulation of gene expression. Our knowledge of this process has been mainly derived from protein-centric studies wherein cis-regulatory DNA sequences play a passive role, mainly in arranging the protein machinery to coalesce at the transcription start sites of genes in a spatial and temporal-specific manner. However, this is a highly dynamic process in which molecular motors such as RNA polymerase II (RNAPII), helicases, and other transcription factors, alter the level of mechanical force in DNA, rather than simply a set of static DNA-protein interactions...
November 2016: Biophysical Reviews
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