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https://www.readbyqxmd.com/read/29144131/twisting-and-tilting-1-1-bis-dialkylphosphino-ferrocene-bound-to-low-valent-tricarbonylmaganese-i-to-i
#1
K Michael Schäfer, Leonie Reinders, Jan Fiedler, Mark R Ringenberg
Recently we had reported the noninnocent behavior of 1,1'-bis(diphenylphosphino)ferrocene (dppf) in Fe(CO)3dppf [Ringenberg et al., Inorg. Chem., 2017, 56, 7501]. Moving to the left in the periodic table, HMn(CO)3(dRpf) where dRpf = dppf (1H) and 1,1'-bis(diisopropylphosphino)ferrocene (dippf) (2H) were synthesized. The hydride ligand was removed by protonation with [(Et2O)2H][B(Ar(F))4] ([B(Ar(F))4](-) = tetrakis[3,5-bis(trifluoromethyl)phenyl]borate), resulting in the rapid evolution of H2 followed by the formation of an Fe→Mn interaction...
November 16, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/29122127/fluoroscopic-iliosacral-screw-placement-made-safe
#2
Nadomir Gusic, Igor Grgorinic, Ivica Fedel, Domagoj Lemac, Nado Bukvic, Matko Gusic, Tedi Cicvaric, Zvonimir Lovric
AIM: Unstable posterior pelvic ring injuries should be stabilised successfully by percutaneous iliosacral screwing. The intervention takes place under intraoperative fluoroscopic guidance. The inlet and outlet views are crucial and are performed by tilting the image intensifier. Safely interpreting fluoroscopic views can be challenging in certain clinical scenarios. We demonstrated on a series of patients howpreoperative CT scans can be used to anticipate the appropriate intraoperative inlet and outlet fluoroscopic views and positioning of the patient on the operating table, thereby avoiding possible operating table obstacles...
November 2017: Injury
https://www.readbyqxmd.com/read/29090359/oblique-retroperitoneal-approach-for-lumbar-interbody-fusion-from-l1-to-s1-in-adult-spinal-deformity
#3
Ki-Tack Kim, Dae-Jean Jo, Sang-Hyun Lee, Eun-Min Seo
In recent years, with advancements in surgical techniques and instrumentation, the lateral lumbar interbody fusion is being used increasingly as an alternative procedure to anterior approach. In this study, we illustrated a oblique retroperitoneal approach for lumbar interbody fusion with one incision site and tilting of the operation table in adult spinal deformity and evaluate the radiographical findings and clinical outcomes of patients treated using this technique. This study included 32 patients scheduled to undergo anterior and posterior long-level fusions for lumbar degenerative kyphosis or degenerative lumbar scoliosis...
October 31, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/29042001/recovery-from-vegetative-state-of-patients-with-a-severe-brain-injury-a-4-year-real-practice-prospective-cohort-study
#4
Alessio Baricich, A de Sire, E Antoniono, F Gozzerino, G Lamberti, C Cisari, M Invernizzi
Patients who have suffered severe traumatic or nontraumatic brain injuries can show a progressive recovery, transitioning through a range of clinical conditions. They may progress from coma to a vegetative state (VS) and/or a minimally conscious state (MCS). A longer duration of the VS is known to be related to a lower probability of emergence from it; furthermore, the literature seems to lack evidence of late improvements in these patients. This real-practice prospective cohort study was conducted in inpatients in a VS following a severe brain injury, consecutively admitted to a vegetative state unit (VSU)...
July 2017: Functional Neurology
https://www.readbyqxmd.com/read/29027688/preoperative-ultrasonographic-assessment-of-the-anterior-pelvic-plane-for-personalized-total-hip-replacement
#5
Andrzej Kochman, Adrian Goral, Josef Kozak, Wojciech Marek, Monika Morawska-Kochman, Marek Synder
OBJECTIVES: Correct positioning of the acetabular component is a key factor in minimizing the risk of dislocation after total hip replacement (THR) surgery. A "safe" orientation of the cup is usually defined by 2 angles measured between its geometric axis and the anterior pelvic plane. However, in the current state-of-the-art approach to THR surgery, the intraoperative orientation of the anterior pelvic plane cannot be measured. Even less is known about the functional orientation of the pelvis, which determines the postoperative orientation of the cup during the patient's everyday activities...
October 13, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29023991/correlation-of-head-up-tilt-table-test-time-interval-with-future-risk-of-recurrent-syncope
#6
Bhanwar L Ranwa, Priti K, Sajal Gupta
BACKGROUND: Head-up tilt table test (HUTT) is widely used for investigation of syncope and presyncope. Time required for positive response has a probable relationship to the sensitivity of neural reflex mechanism underlying syncope. METHODS: We evaluated patients with history of syncope. Group A included patients with recurrent syncope defined as 2 or more episodes of syncope and group B included those with 1 episode of syncope. Time required for the test to become positive in both the groups was analyzed...
October 10, 2017: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29019905/bezold-jarisch-reflex-occurred-in-a-pediatric-patient-with-giant-intra-abdominal-teratoma-during-induction-of-anesthesia-a-case-report
#7
Kai-Ming Yuan, Shu-Ying Fu, Jun Li, Wang-Ning Shangguan, Qing-Quan Lian
RATIONALE: Bezold-Jarisch reflex (BJR) occurs when the cardioinhibitory receptors in the walls of ventricles are activated by various stimuli, with typical features of bradycardia, vasorelaxation, and hypotension. This reflex usually happens in parturient intrathecal anesthesia, as a result of decreased venous return by compression of inferior vena cava, but it is only rarely reported during general anesthesia. PATIENT CONCERNS: Severe bradycardia and hypotension, indicating BJR, occurred during the induction of general anesthesia in a 3-month-old female child with giant intra-abdominal teratoma...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28986003/postural-tachycardia-in-hypermobile-ehlers-danlos-syndrome-a-distinct-subtype
#8
Mitchell G Miglis, Brittany Schultz, Srikanth Muppidi
INTRODUCTION: It is not clear if patients with postural tachycardia syndrome (POTS) and Ehlers-Danlos syndrome (hEDS) differ from patients with POTS due to other etiologies. We compared the results of autonomic testing and healthcare utilization in POTS patients with and without hEDS. METHODS: Patients with POTS+hEDS (n=20) and POTS controls without hypermobility (n=20) were included in the study. All patients underwent autonomic testing, and the electronic medical records were reviewed to determine the number and types of medications patients were taking, as well as the number of outpatient, emergency department, and inpatient visits over the prior year...
October 2, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28960795/gastric-myoelectrical-and-neurohormonal-changes-associated-with-nausea-during-tilt-induced-syncope
#9
G L Heyer, L H Boles, R A Harvey, M J Cismowski
BACKGROUND: Nausea is a common prodromal symptom of neurally mediated syncope, but the biological factors linking nausea with syncope have not been studied. We aimed to characterize nausea during tilt-induced syncope by exploring related changes in gastric myoelectrical activity and plasma epinephrine, norepinephrine, and vasopressin concentrations across study phases of recumbency, tilt, syncope, and recovery. METHODS: Electrogastrographic and plasma hormone changes were compared between patients with tilt-induced syncope and nausea (n = 18) and control subjects (n = 6) without symptoms or hemodynamic changes during tilt-table testing...
September 27, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28939425/kinematic-analysis-of-a-drinking-task-in-chronic-hemiparetic-patients-using-features-analysis-and-statistical-parametric-mapping
#10
Gabriela Lopes Santos, Thiago Luiz Russo, Angela Nieuwenhuys, Davide Monari, Kaat Desloovere
OBJECTIVE: To compare sitting posture and movement strategies between chronic hemiparetic and healthy subjects while performing a drinking task using Statistical Parametric Mapping (SPM) and feature analysis. DESIGN: Cross-sectional study. SETTING: Department of Physical Therapy of University. PARTICIPANTS: Thirteen chronic hemiparetic and thirteen healthy individuals matched for gender and age. INTERVENTION: Not applicable...
September 19, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28904457/delayed-orthostatic-hypotension-a-pilot-study-from-india
#11
Arun Grace Roy, Siby Gopinath, Suresh Kumar, Sudheeran Kannoth, Anand Kumar
INTRODUCTION: Orthostatic hypotension is defined as a sustained decrease in systolic blood pressure of 20 mm Hg or a decrease in diastolic blood pressure of 10 mm Hg within three minutes of standing compared with blood pressure from the sitting or supine position or by head-up tilt-table testing (1). When sustained blood pressure (BP) drop is after three minutes of upright posture it is called delayed orthostatic hypotension (delayed OH) (2). AIM OF THE STUDY: To detect the incidence of delayed orthostatic hypotension in patients referred to our autonomic lab...
July 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/28885987/theoretical-and-experimental-comparison-of-lag-based-and-time-based-exponential-moving-average-models-of-qt-hysteresis
#12
Vincent Jacquemet, Hugo Gravel, Daniel Curnier, Alain Vinet
In the electrocardiogram, adaptation of the QT interval to variations in heart rate is not instantaneous. Quantification of this hysteresis phenomenon relies on mathematical models describing the relation between the RR and QT time series.These models reproduce hysteresis through an effective RR interval computed as a linear combination of the history of past RR intervals. This filter depends on a time constant parameter that may be used as biomarker. The most common hysteresis model is based on an autoregressive filter with an impulse response that decreases exponentially with the beat number (lag-based model)...
September 8, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28859846/the-influence-of-the-hips-position-on-measurements-of-posterior-tilt-in-a-valgus-impacted-femoral-neck-fracture
#13
Sigurd Erik Hoelsbrekken, Filip C Dolatowski
INTRODUCTION: Lateral radiographs are important for the evaluation of Garden I and II femoral neck fractures. These fractures appear undisplaced in the anteroposterior view, but posterior tilt of the femoral head may still be present in the lateral view. The influence of posterior tilt is, however, debated, which could be caused by the use of non-standardized cross-table radiographs in the conflicting reports. The aim of this bone-model study was therefore to evaluate the influence of the hips position on measurements of posterior tilt...
August 26, 2017: Injury
https://www.readbyqxmd.com/read/28827487/clinical-and-laboratory-profiles-of-idiopathic-small-fiber-neuropathy-in-children-case-series
#14
Jafar Kafaie, Ali Al Balushi, Minsoo Kim, Alan Pestronk
The role of autoimmune mechanisms in idiopathic small fiber neuropathy (SFN) is not completely understood. Serum IgM binding to trisulfated disaccharide IdoA2S-GlcNS-6S (TS-HDS) and IgG to fibroblast growth factor receptor 3 were associated with sensory motor polyneuropathies and sensory neuronopathy among others. In this retrospective case review, we describe the clinical and laboratory findings of idiopathic SFN in a small cohort of pediatric patients. Eight children were diagnosed with SFN clinically and confirmed by reduced epidermal nerve fiber density...
September 2017: Journal of Clinical Neuromuscular Disease
https://www.readbyqxmd.com/read/28816725/effect-of-citalopram-for-the-treatment-of-neurocardiogenic-syncope
#15
Amer N Kadri, Leen Nusairat, Samah Kadri, Ammar Alqaid, Adrian V Hernandez, Nazih N Kadri
BACKGROUND: Neurocardiogenic syncope (NCS) is a common form of syncope. Although selective serotonin reuptake inhibitors and other medications have been used to treat NCS with variable success, there is no consensus regarding a first-line therapy. STUDY QUESTION: To assess the effects of citalopram in NCS and to examine the effect of diagnostic use of the head-up tilt table (HUTT) versus empirical diagnosis on patient outcome. STUDY DESIGN: A retrospective case series of 1000 consecutive patients who were diagnosed with NCS and treated with citalopram...
August 16, 2017: American Journal of Therapeutics
https://www.readbyqxmd.com/read/28795253/autonomic-responses-to-head-up-tilt-test-in-children-with-autism-spectrum-disorders
#16
Véronique-Aurélie Bricout, Marion Pace, Léa Dumortier, Anne Favre-Juvin, Michel Guinot
Autism Spectrum Disorders (ASD) is a group of neurodevelopmental disorders often manifested by social and behavioral deficiencies. Autonomic dysfunction is frequently reported in the autistic population but the mechanisms remain largely unknown. We aimed to characterize the cardiac autonomic profile of children with autism during a head-up tilt test. Thirty-nine male children were recruited: 19 controls (9.9 ± 1.6 years) and 20 children with ASD without intellectual disability (10.7 ± 1.2 years). Each child underwent a head-up tilt test on a motorized tilt table...
August 9, 2017: Journal of Abnormal Child Psychology
https://www.readbyqxmd.com/read/28790467/current-concepts-in-acetabular-positioning-in-total-hip-arthroplasty
#17
Deepu Bhaskar, Asim Rajpura, Tim Board
Being one of the most successful surgeries in the history of medicine, the indications for total hip arthroplasty have widened and are increasingly being offered to younger and fitter patients. This has also led to high expectations for longevity and outcomes. Acetabular cup position has a significant impact on the results of hip arthroplasty as it affects dislocation, abductor muscle strength, gait, limb lengths, impingement, noise generation, range of motion (ROM), wear, loosening, and cup failure. The variables in cup position are depth, height, and angular position (anteversion and inclination)...
July 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28768776/the-validity-and-reproducibility-of-cross-table-radiographs-compared-with-ct-scans-for-the-measurement-of-anteversion-of-the-acetabular-component-after-total-hip-arthroplasty
#18
A Pankaj, A Mittal, A Chawla
AIMS: The aim of this study was to assess the reproducibility and validity of cross table radiographs for measuring the anteversion of the acetabular component after total hip arthroplasty (THA) and to compare it with measurements using CT scans. PATIENTS AND METHODS: A total of 29 patients who underwent THA between June 2010 and January 2016 were included. There were 17 men and 12 women. Their mean age was 43 years (26 to 65). Seven patients underwent a bilateral procedure...
August 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28754145/changes-in-cardiac-function-and-hemodynamics-during-robot-assisted-laparoscopic-prostatectomy-with-steep-head-down-tilt-a-prospective-observational-study
#19
Naomi Ono, Junko Nakahira, Shoko Nakano, Toshiyuki Sawai, Toshiaki Minami
OBJECTIVE: Robot-assisted laparoscopic prostatectomy requires the patient to be placed in a steep head-down tilt. The aim of our study was to investigate changes in cardiac index and left ventricular end-diastolic volume in a steep had-down tilt. This is a prospective observational study. We investigated the influence of steep head-down tilt on cardiac function and hemodynamics without fluid restriction in 12 men of American Society of Anesthesiologists physical status I-II undergoing robot-assisted laparoscopic prostatectomy...
July 28, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28717053/pure-autonomic-failure
#20
REVIEW
Thomas P Brown
Pure autonomic failure is a degenerative disorder of the peripheral autonomic nervous system. Patients experience symptomatic hypotension that requires them to sit, squat or lie down to prevent syncope. It is associated with characteristic histopathological findings, resulting in neuronal cytoplasmic inclusions in the peripheral autonomic nerves. These lesions are responsible for defects in the synthesis and release of norepinephrine from sympathetic nerve terminals, resulting in significant hypotension. Patients with autonomic failure also have exaggerated blood pressure responses to common stimuli such as food or fluid intake, heat, exercise and medications...
October 2017: Practical Neurology
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