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https://www.readbyqxmd.com/read/28426631/directional-changes-in-tissue-reflectivity-may-influence-flow-detection-on-optical-coherence-tomography-angiography
#1
Rosa Dolz-Marco, K Bailey Freund
PURPOSE: To determine if directional or anatomical changes in tissue reflectivity of Henle fiber layer (HFL) may influence flow detection on optical coherence tomography angiography (OCT-A). METHODS: Cross-sectional analysis of consecutive cases undergoing OCT-A. Directional changes in visualization of HFL were either produced manually by moving the beam entrance within the pupil or observed occurring naturally because of tilting of the OCT line-scan within a myopic staphyloma...
April 19, 2017: Retina
https://www.readbyqxmd.com/read/28425054/can-a-three-component-prosthesis-be-used-for-conversion-of-painful-ankle-arthrodesis-to-total-ankle-replacement
#2
Markus Preis, Travis Bailey, Lucas S Marchand, Alexej Barg
BACKGROUND: In patients with painful ankle arthrodesis, the surgical treatment is challenging, and may include takedown of ankle arthrodesis and conversion to a total ankle replacement (TAR). This procedure is technically demanding given the altered anatomy after arthrodesis. Few studies have evaluated TAR in the setting of prior arthrodesis. QUESTIONS/PURPOSES: (1) What intraoperative and perioperative complications were observed in patients who underwent conversion of an ankle arthrodesis to a TAR? (2) Was durable fixation achieved at short term, and what was the alignment of the components? (3) What subsequent surgical procedures were performed, including revisions? (4) What improvements were observed in pain, tibiotalar range of motion (ROM), and quality of life? METHODS: Between January 2007 and December 2014, 18 patients with a painful ankle arthrodesis underwent conversion to TAR at our tertiary referral center...
April 19, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28420897/in-vivo-analysis-of-three-dimensional-dynamic-scapular-dyskinesis-in-scapular-or-clavicular-fractures
#3
Eugene Kim, Jai Hyung Park, Byeong-Ryong Han, Hee Jin Park, So Yeon Lee, Tsuyoshi Murase, Kazumi Sugamoto, Sumika Ikemoto, Se-Jin Park
The three-dimensional (3D) kinematics of the scapula were analyzed in vivo in 10 patients with scapular and 10 patients with clavicular fracture. Both the injured shoulder and normal contralateral shoulder were evaluated by computed tomography in the neutral and fully elevated positions. 3D rotational and translational movements of the scapula relative to the thorax during arm elevation were analyzed. A computer simulation program was used to compare rotational elevation/depression in the coronal plane, anterior/posterior tilting in the sagittal plane and protraction/retraction in the axial plane between the normal and affected sides...
April 2017: Acta Medica Okayama
https://www.readbyqxmd.com/read/28413721/aspects-of-gorgonopsian-paleobiology-and-evolution-insights-from-the-basicranium-occiput-osseous-labyrinth-vasculature-and-neuroanatomy
#4
Ricardo Araújo, Vincent Fernandez, Michael J Polcyn, Jörg Fröbisch, Rui M S Martins
Synapsida, the clade including therapsids and thus also mammals, is one of the two major branches of amniotes. Organismal design, with modularity as a concept, offers insights into the evolution of therapsids, a group that experienced profound anatomical transformations throughout the past 270 Ma, eventually leading to the evolution of the mammalian bauplan. However, the anatomy of some therapsid groups remains obscure. Gorgonopsian braincase anatomy is poorly known and many anatomical aspects of the brain, cranial nerves, vasculature, and osseous labyrinth, remain unclear...
2017: PeerJ
https://www.readbyqxmd.com/read/28412801/-preliminary-report-on-the-application-of-femtosecond-laser-assisted-anterior-capsulotomy-in-intumescent-white-cataract-surgery
#5
T T Peng, Y Wang, X Y Bao
Objective: To assess the effect of femtosecond laser-assisted anterior capsulotomy in intumescent white cataract surgery. Methods: Retrospective case series study. One hundred and fifty cataract patients (150 eyes) from June 2014 to June 2015 in Wuhan Aier ophthalmology hospital were enrolled in this study. They were divided into three groups: 50 intumescent white cataract patients (50 eyes) in the study group were performed femtosecond laser-assisted capsulotomy (LenSx system) operation selectively. Fifty intumescent white cataract patients (50 eyes) underwent normal manual continuous circular capsulorhexis as the control group 1...
April 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28389887/selective-versus-hyperselective-posterior-fusions-in-lenke-5-adolescent-idiopathic-scoliosis-comparison-of-radiological-and-clinical-outcomes
#6
B Ilharreborde, E Ferrero, A Angelliaume, Y Lefèvre, F Accadbled, A L Simon, J Sales de Gauzy, K Mazda
PURPOSE: Recent literature has reported that the ]progression risk of Lenke 5 adolescent idiopathic scoliosis (AIS) during adulthood had been underestimated. Surgery is, therefore, proposed more to young patients with progressive curves. However, choice of the approach and fusion levels remains controversial. The aim of this study was to analyze the influence of the length of posterior fusion on clinical and radiological outcomes in Lenke 5 AIS. METHODS: All Lenke 5 AIS operated between 2008 and 2012 were included with a minimum 2-year follow-up...
April 7, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28389788/portal-vein-branching-order-helps-in-the-recognition-of-anomalous-right-sided-round-ligament-common-features-and-variations-in-portal-vein-anatomy
#7
Rikiya Yamashita, Toshihide Yamaoka, Ryuta Nishitai, Hiroyoshi Isoda, Kojiro Taura, Shigeki Arizono, Akihiro Furuta, Tsuyoshi Ohno, Ayako Ono, Kaori Togashi
PURPOSE: This study aimed to evaluate the common features and variations of portal vein anatomy in right-sided round ligament (RSRL), which can help propose a method to detect and diagnose this anomaly. METHODS: In this retrospective study of 14 patients with RSRL, the branching order of the portal tree was analyzed, with special focus on the relationship between the dorsal branch of the right anterior segmental portal vein (PA-D) and the lateral segmental portal vein (PLL), to determine the common features...
April 7, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28360122/increased-cerebral-blood-volume-pulsatility-during-head-down-tilt-with-elevated-carbon-dioxide-the-spacecot-study
#8
Gary E Strangman, Quan Zhang, Karina Marshall-Goebel, Edwin Mulder, Brian Stevens, Jonathan B Clark, Eric M Bershad
Astronauts aboard the International Space Station (ISS) have exhibited hyperopic shifts, posterior eye globe flattening, dilated optic nerve sheaths, and even optic disc swelling from spaceflight. Elevated intracranial pressure (ICP) consequent to cephalad fluid shifts is commonly hypothesized as contributing to these ocular changes. Head-down tilt (HDT) is frequently utilized as an Earth-based analog to study similar fluid shifts. Sealed environments like the ISS also exhibit elevated carbon dioxide (CO2), a potent arteriolar vasodilator that could further affect cerebral blood volume and flow, intracranial compliance, and ICP...
March 30, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28356622/evaluation-of-the-relationship-between-the-static-measurement-of-transverse-arch-flexibility-of-the-forefoot-and-gait-parameters-in-healthy-subjects
#9
Takashi Kondo, Takeshi Muneta, Tsutomu Fukui
[Purpose] To investigate the relationship between the static measurement of the transverse arch of the forefoot, using a 3-dimensional (3D) foot scanner, and kinetics and kinematics of gait parameters in the sagittal plane. [Subjects and Methods] Twenty healthy subjects participated in this study. The transverse arch of the forefoot was measured under three conditions as follows: condition 1, sitting; condition 2, standing; and condition 3, foot forward and lower leg tilting anteriorly to the maximum position with heel contact...
March 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28347933/mechanical-effects-of-traction-on-lumbar-intervertebral-discs-a%C3%A2-magnetic-resonance-imaging-study
#10
Daniel H K Chow, Ernest M K Yuen, L Xiao, Mason C P Leung
BACKGROUND: Although traction has long been used for treating patients with low back pain (LBP), its effects are still inconclusive mainly because of limited high-quality evidence. OBJECTIVE: To provide evidence of the mechanism of traction on lumbar intervertebral discs. DESIGN: A quantitative approach with a repeated measurement protocol. METHOD: Nine participants (mean age = 22.1 ± 0.8 years) without any LBP history were recruited...
March 20, 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/28343332/posterior-elements-disruption-with-hybrid-constructs-in-ais-patients-is-there-an-impact-on-proximal-junctional-kyphosis
#11
S Ghailane, Sebastien Pesenti, E Peltier, E Choufani, B Blondel, J L Jouve
PURPOSE: Proximal junctional kyphosis (PJK) is a frequent proximal adjacent segment disease following spinal fusion in adolescent idiopathic scoliosis (AIS) and its rate has been estimated to 28% in the literature. The etiology is multifactorial, and risk factors associated with PJK are controversial. The aim of this study was to demonstrate that the disruption of muscular and bony tissue above the upper instrumented vertebra (UIV) during surgery does not increase the rate of PJK in patients undergoing posterior fusion for adolescent idiopathic scoliosis...
May 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28331906/associations-between-sarcopenia-and-degenerative-lumbar-scoliosis-in-older-women
#12
Yawara Eguchi, Munetaka Suzuki, Hajime Yamanaka, Hiroshi Tamai, Tatsuya Kobayashi, Sumihisa Orita, Kazuyo Yamauchi, Miyako Suzuki, Kazuhide Inage, Kazuki Fujimoto, Hirohito Kanamoto, Koki Abe, Yasuchika Aoki, Tomoaki Toyone, Tomoyuki Ozawa, Kazuhisa Takahashi, Seiji Ohtori
BACKGROUND: Age-related sarcopenia can cause various forms of physical disabilities. We investigated how sarcopenia affects degenerative lumbar scoliosis (DLS) and lumbar spinal canal stenosis (LSCS). METHODS: Subjects comprised 40 elderly women (mean age 74 years) with spinal disease whose chief complaints were low back pain and lower limb pain. They included 15 cases of DLS (mean 74.8 years) and 25 cases of LSCS (mean age 72.9 years). We performed whole-body dual-energy X-ray absorptiometry (DXA) to analyze body composition, including appendicular and trunk skeletal muscle mass index (SMI; lean mass (kg)/height (m)(2)) and bone mineral density (BMD)...
2017: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/28330796/chronic-low-back-pain-after-lumbosacral-fracture-due-to-sagittal-and-frontal-vertebral-imbalance
#13
L Boyoud-Garnier, M Boudissa, S Ruatti, G Kerschbaumer, P Grobost, J Tonetti
PROBLEM AND HYPOTHESIS: Over time, some patients with unilateral or bilateral lumbosacral injuries experience chronic low back pain. We studied the sagittal and frontal balance in a population with these injuries to determine whether mismatch in the pelvic and lumbar angles are associated with chronic low back pain. PATIENTS AND METHODS: Patients with posterior pelvic ring fractures (Tile C1, C2, C3 and A3.3) that had healed were included. Foreign patients and those with an associated spinal or acetabular fracture or nonunion were excluded...
March 19, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28324202/the-influence-of-surgical-approach-on-postoperative-pelvic-tilt-after-total-hip-arthroplasty
#14
Daisuke Inoue, Tamon Kabata, Yoshitomo Kajino, Tadashi Taga, Kazuhiro Hasegawa, Takashi Yamamoto, Tomoharu Takagi, Takaaki Ohmori, Hiroyuki Tsuchiya
BACKGROUND: Past reports have shown the tendency of posterior pelvic tilt to increase over time after total hip arthroplasty (THA). We have hypothesized that the volume and extent of released joint capsule may influence the change in postoperative pelvic tilt. This study was conducted to ascertain whether surgical approach during THA (posterior or anterior) has an effect on postoperative changes in pelvic tilt. METHODS: We conducted a retrospective review of 81 hips in 60 patients...
March 21, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28320847/multivoxel-pattern-analysis-reveals-3d-place-information-in-the-human-hippocampus
#15
Misun Kim, Kate J Jeffery, Eleanor A Maguire
The spatial world is three dimensional (3D) and humans and other animals move both horizontally and vertically within it. Extant neuroscientific studies have typically investigated spatial navigation on a horizontal 2D plane, leaving much unknown about how 3D spatial information is represented in the brain. Specifically, horizontal and vertical information may be encoded in the same or different neural structures with equal or unequal sensitivity. Here, we investigated these possibilities using fMRI while participants were passively moved within a 3D lattice structure as if riding a rollercoaster...
April 19, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28306639/defining-the-role-of-the-lower-limbs-in-compensating-for-sagittal-malalignment
#16
Renaud Lafage, Barthelemy Liabaud, Bassel G Diebo, Jonathan H Oren, Shaleen Vira, Sébastien Pesenti, Themistocles S Protopsaltis, Thomas J Errico, Frank J Schwab, Virginie Lafage
STUDY DESIGN: Retrospective review OBJECTIVE.: Investigate the role of lower limbs compensation with progressive sagittal malalignment SUMMARY OF BACKGROUND DATA.: While lower limb compensatory mechanisms are an established response to progressive sagittal malalignment, their specific role and potential impact on surgical planning has not been evaluated. METHODS: Single center retrospective review of full body xrays was performed in patients >20 yrs. Parameters were measured with dedicated software...
March 16, 2017: Spine
https://www.readbyqxmd.com/read/28306330/effect-of-changing-the-head-position-on-accuracy-of-transverse-measurements-of-the-maxillofacial-region-made-on-cone-beam-computed-tomography-and-conventional-posterior-anterior-cephalograms
#17
Abbas Shokri, Amirfarhang Miresmaeili, Nasrin Farhadian, Sepideh Falah-Kooshki, Payam Amini, Najmeh Mollaie
OBJECTIVES: This study aimed to assess the effect of head position on the accuracy of transverse measurements of the maxillofacial region on CBCT and conventional posteroanterior (PA) cephalograms. The second objective of this study was to find skull positions with the greatest and smallest effect on transverse measurements in the maxillofacial region. METHODS: PA cephalograms and CBCT scans were obtained from 10 dry human skulls in 7 positions, namely the central position, 10° and 20° rotations, 10° and 20° tilts and 10° and 20° tips...
April 12, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28303383/surgical-management-of-coronal-and-sagittal-imbalance-of-the-spine-without-pso-a-multicentric-cohort-study-on-compensated-adult-degenerative-deformities
#18
Alessandro Ramieri, Massimo Miscusi, Maurizio Domenicucci, Antonino Raco, Giuseppe Costanzo
PURPOSE: Sagittal imbalance of severe adult degenerative deformities requires surgical correction to improve pain, mobility and quality of life. Our aim was a harmonic and balanced spine, treating a series of adult degenerative thoracolumbar and lumbar kyphoscoliosis by a non posterior subtraction osteotomy technique. METHODS: We operated 22 painful thoracolumbar and lumbar compensated degenerative deformities by anterior (ALIF), extreme lateral (XLIF) and transforaminal (TLIF) interbody fusion and grade 2 osteotomy (SPO) to restore lumbar lordosis and mobilize the coronal curve...
March 16, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28297177/kinematics-of-the-pelvis-torso-and-lower-limb-during-obstacle-negotiation-while-under-temporal-constraints
#19
Jesse C Christensen, Christopher R Wilson, Andrew S Merryweather, K Bo Foreman
Biomechanics of unobstructed locomotion consists of synchronized complex movements of the pelvis, torso, and lower limbs. These movement patterns become more complex as individuals encounter obstacles or negotiate uneven terrain. To date, limited research has explored how specifically the pelvis, torso, and lower limb segments relate to obstacle negotiation of varying sized objects combined with temporal constraints to perform the task. Understanding pelvis and adjoining segment movements during object negotiation will provide necessary information in identifying abnormal mechanics and potential fall risk characteristics in balance compromised patient populations...
April 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28248894/extensive-corrective-fixation-surgeries-for-adult-spinal-deformity-improve-posture-and-lower-extremity-kinematics-during-gait
#20
Hideyuki Arima, Yu Yamato, Tomohiko Hasegawa, Sho Kobayashi, Go Yoshida, Tatsuya Yasuda, Tomohiro Banno, Shin Oe, Yuki Mihara, Daisuke Togawa, Yukihiro Matsuyama
STUDY DESIGN: Longitudinal cohort. OBJECTIVE: This study aimed to document changes in posture and lower extremity kinematics during gait in patients with adult spinal deformity (ASD) after extensive corrective surgery. SUMMARY OF BACKGROUND DATA: Standing radiographic parameters are typically used to evaluate ASD patients. Previously, preoperative walking and standing posture discrepancy were reported in ASD patients. However, we didn't include comparison between before and after surgery...
February 28, 2017: Spine
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