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https://www.readbyqxmd.com/read/29351678/endoscopic-transcranial-duraplasty-for-rhinoliquorrhea-a-cadaveric-study
#1
Andrea Bartoli, Jean H Fasel, Karl Schaller, Max Jägersberg
BACKGROUND: Repair of the anterior skull base for cerebrospinal fluid leak requires either endoscopic endonasal approach or open transcranial approach. OBJECTIVE: To present a less invasive surgical procedure for sealing of the entire anterior fossa floor for traumatic rhinoliquorrhea. METHODS: Cadaver study in 3 head specimens. Endoscopic placement of a furled bovine pericardial patch bilaterally along the sphenoid ridge and planum in guidewire technique...
February 1, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29351552/in-situ-recording-of-ionic-currents-in-projection-neurons-and-kenyon-cells-in-the-olfactory-pathway-of-the-honeybee
#2
Jan Kropf, Wolfgang Rössler
The honeybee olfactory pathway comprises an intriguing pattern of convergence and divergence: ~60.000 olfactory sensory neurons (OSN) convey olfactory information on ~900 projection neurons (PN) in the antennal lobe (AL). To transmit this information reliably, PNs employ relatively high spiking frequencies with complex patterns. PNs project via a dual olfactory pathway to the mushroom bodies (MB). This pathway comprises the medial (m-ALT) and the lateral antennal lobe tract (l-ALT). PNs from both tracts transmit information from a wide range of similar odors, but with distinct differences in coding properties...
2018: PloS One
https://www.readbyqxmd.com/read/29351507/-i-smoke-like-this-to-suppress-these-issues-that-are-flaws-of-my-character-challenges-and-facilitators-of-cessation-among-smokers-with-bipolar-disorder
#3
Jaimee L Heffner, Noreen L Watson, Jennifer B McClure, Robert M Anthenelli, Sarah Hohl, Jonathan B Bricker
OBJECTIVE: Smokers with bipolar disorder (BD) have low rates of successful quitting, yet no prior studies have evaluated the process of quitting among these smokers in the context of a current quit attempt. To facilitate development of more effective interventions, we conducted a qualitative exploration of challenges and facilitators of quitting in an intervention study for smokers with BD. METHODS: Participants were adult daily smokers with BD (n = 10) who completed a 10-week smoking cessation intervention consisting of Acceptance and Commitment Therapy (ACT) and nicotine patch...
January 19, 2018: Journal of Dual Diagnosis
https://www.readbyqxmd.com/read/29351460/macrophage-dependent-impairment-of-%C3%AE-2-adrenergic-autoreceptor-function-in-sympathetic-neurons-from-doca-salt-but-not-high-fat-diet-induced-hypertensive-rats
#4
Ryan Kwun-Yee Mui, Roxanne Fernandes, Hannah Garver, Nico van Rooijen, James J Galligan
DOCA-salt and obesity-related hypertension are associated with inflammation and sympathetic nervous system hyperactivity. Prejunctional α2-adrenergic receptors (α2ARs) provide negative feedback to norepinephrine release from sympathetic nerves through inhibition of N-type Ca2+ channels. Increased neuronal norepinephrine release in DOCA-salt and obesity-related hypertension occurs through impaired α2AR signaling, however, the mechanisms involved are unclear. Mesenteric arteries are resistance arteries that receive sympathetic innervation from the superior mesenteric and celiac ganglia (SMCG)...
January 5, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29351321/methylglyoxal-produces-more-changes-in-biochemical-and-biophysical-properties-of-human-igg-under-high-glucose-compared-to-normal-glucose-level
#5
Mohd Adnan Khan, Zarina Arif, Mohd Asad Khan, Moinuddin, Khursheed Alam
Hyperglycaemia triggers increased production of methylglyoxal which can cause gross modification in proteins' structure vis-a-vis function though advanced glycation end products (AGEs). The AGEs may initiate vascular and nonvascular pathologies. In this study, we have examined the biochemical and biophysical changes in human IgG under normal and high glucose after introducing methylglyoxal into the assay mixture. This non-enzymatic reaction mainly engaged lysine residues as indicated by TNBS results. The UV results showed hyperchromicity in modified-IgG samples while fluorescence data supported AGEs formation during the course of reaction...
2018: PloS One
https://www.readbyqxmd.com/read/29350922/computing-curvature-sensitivity-of-biomolecules-in-membranes-by-simulated-buckling
#6
Federico Elias-Wolff, Martin Lindén, Alexander P Lyubartsev, Erik G Brandt
Membrane curvature sensing, where the binding free energies of membrane-associated molecules depend on the local membrane curvature, is a key factor to modulate and maintain the shape and organization of cell membranes. However, the microscopic mechanisms are not well understood, partly due to absence of efficient simulation methods. Here, we describe a method to compute the curvature dependence of the binding free energy of a membrane-associated probe molecule that interacts with a buckled membrane, which has been created by lateral compression of a flat bilayer patch...
January 19, 2018: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/29350688/laws-of-physics-help-explain-capillary-non-perfusion-in-diabetic-retinopathy
#7
E Stefánsson, Y K Chan, T Bek, S H Hardarson, D Wong, D I Wilson
The purpose is to use laws of physics to elucidate the mechanisms behind capillary non-perfusion in diabetic retinopathy. In diabetic retinopathy, loss of pericytes weakens capillary walls and the vessel dilates. A dilated capillary has reduced resistance to flow, therefore increased flow in that vessel and decreased in adjoining capillaries. A preferential shunt vessel is thus formed from the dilated capillary and the adjacent capillaries become non-perfused. We apply the laws of Laplace and Hagen-Poiseuille to better understand the phenomena that lead to capillary non-perfusion...
January 19, 2018: Eye
https://www.readbyqxmd.com/read/29350537/cartilage-morphological-and-histological-findings-after-reconstruction-of-the-glenoid-with-an-iliac-crest-bone-graft
#8
Alexander Auffarth, Herbert Resch, Nicholas Matis, Martin Hudelmaier, Wolfgang Wirth, Rosemarie Forstner, Daniel Neureiter, Andreas Traweger, Philipp Moroder
BACKGROUND: The J-bone graft is presumably representative of iliac crest bone grafts in general and allows anatomic glenoid reconstruction in cases of bone defects due to recurrent traumatic anterior shoulder dislocations. As a side effect, these grafts have been observed to be covered by some soft, cartilage-like tissue when arthroscopy has been indicated after such procedures. PURPOSE: To evaluate the soft tissue covering of J-bone grafts by use of magnetic resonance imaging (MRI) and histological analysis...
January 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29350395/early-results-of-aortic-arch-reconstruction-and-bilateral-pulmonary-arteries-banding-modification-of-the-norwood-operation-for-treatment-of-hypoplastic-left-heart-syndrome
#9
Jacek W Pająk, Michał Buczyński, Piotr Stanek, Grzegorz Zalewski, Marek Wites, Lesław Szydłowski, Lidia Tomkiewicz-Pająk
BACKGROUND: In the period from 2003 to the end of 2015, 96 Norwood I procedures were performed in Pediatric Heart Surgery Department in Katowice, Poland, in children with hypoplastic left heart syndrome (HLHS). AIM: This paper presents a retrospective analysis of early surgical results. METHODS: The patients consisted of two groups: Group I included 59 children operated on in the years 2003-2012 in whom the stage I Norwood procedure with the Sano modification was performed with the aortic arch reconstructed by use of a homogenous pulmonary artery patch or a bovine pericardial patch...
January 19, 2018: Kardiologia Polska
https://www.readbyqxmd.com/read/29350285/gut-shuttle-service-endozoochory-of-dispersal-limited-soil-fauna-by-gastropods
#10
Manfred Türke, Markus Lange, Nico Eisenhauer
Numerous important ecosystem functions and services depend on soil biodiversity. However, little is known about the mechanisms which maintain the vast belowground biodiversity and about the filters shaping soil community composition. Yet, biotic interactions like facilitation and dispersal by animals are assumed to play a crucial role, particularly as most soil animal taxa are strongly limited in their active dispersal abilities. Here, we report on a newfound interaction of potentially high ubiquity and importance in soil communities: the endozoochorous dispersal of soil fauna by gastropods...
January 19, 2018: Oecologia
https://www.readbyqxmd.com/read/29349988/-comparison-of-analgesic-effects-between-multimodal-and-patient-controlled-intravenous-analgesia-in-patients-with-rheumatoid-arthritis-in-the-perioperative-period-of-total-knee-arthroplasty
#11
Hua-Li Gao, Lian-Bo Xiao, Wei-Tao Zhai, Yong He, Fei Zhu, Lin Zheng, Xiu-Wei Han
OBJECTIVE: To compare the analgesic effect between multimodal and patient-controlled intravenous analgesia(PCIA) in patients with rheumatoid arthritis(RA) in the perioperative period of knee joint replacement. METHODS: From June 2015 to June 2016, 40 RA patients undergoing total knee arthroplasty were randomly divided into two groups. There were 20 patients in PCIA group, including 3 males and 17 females, with an average age of(59.6±2.3) years old, who received controlled instillation of sufentanil analgesia controlled by an intravenous analgesia pump...
April 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29349695/efficacy-of-atopy-patch-testing-in-directed-dietary-therapy-of-eosinophilic-esophagitis-a-pilot-study
#12
Jason D Eckmann, Karthik Ravi, David A Katzka, Dawn R Davis, Jacalyn A See, Debra R Geno, Lori A Kryzer, Jeffrey A Alexander
BACKGROUND: Atopy patch testing (APT) has shown potential for predicting dietary food triggers in studies of children and adolescents with eosinophilic esophagitis (EoE). AIMS: To assess the efficacy of APT in adults with EoE. METHODS: We conducted a prospective open-label pilot study of patients ≥ 18 years old with diagnosis of EoE at Mayo Clinic in Rochester, Minnesota, from November 2014 to January 2016. All patients underwent patch testing using intact food products, followed by a six food elimination diet and stepwise food reintroduction...
January 18, 2018: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/29349542/laparoscopic-pancreaticoduodenectomy-with-reconstruction-of-the-mesentericoportal-vein-with-the-parietal-peritoneum-and-the-falciform-ligament
#13
Safi Dokmak, Béatrice Aussilhou, Mélanie Calmels, Houcine Maghrebi, Fadhel Samir Ftériche, Olivier Soubrane, Alain Sauvanet
BACKGROUND: With the improvement of the surgical technique of Laparoscopic pancreaticoduodenectomy (LPD), indications will be extended to patients with vascular invasion. With LPD, vascular grafts for reconstruction are more frequently needed because adequate mobilization is not always done and vascular grafts can safely facilitate reconstruction. We describe our experience of reconstruction with the falciform ligament. METHODS: Venous reconstruction is performed after removal of the specimen...
January 18, 2018: Surgical Endoscopy
https://www.readbyqxmd.com/read/29349450/complex-patchy-colloids-shaped-from-deformable-seed-particles-through-capillary-interactions
#14
V Meester, D J Kraft
We investigate the mechanisms underlying the reconfiguration of random aggregates of spheres through capillary interactions, the so-called "colloidal recycling" method, to fabricate a wide variety of patchy particles. We explore the influence of capillary forces on clusters of deformable seed particles by systematically varying the crosslink density of the spherical seeds. Spheres with a poorly crosslinked polymer network strongly deform due to capillary forces and merge into large spheres. With increasing crosslink density and therefore rigidity, the shape of the spheres is increasingly preserved during reconfiguration, yielding patchy particles of well-defined shape for up to five spheres...
January 19, 2018: Soft Matter
https://www.readbyqxmd.com/read/29349429/repair-of-a-mycotic-abdominal-aortic-aneurysm-in-a-neonate-using-an-everted-jugular-vein-patch
#15
Samantha L Ahle, Jonathan A Cardella, Muriel A Cleary, David H Stitelman, Timur P Sarac, Michael G Caty
A 43-day-old boy presented with bacteremia after umbilical artery catheterization. Duplex ultrasound examination revealed a 1.1- × 1.6-cm mycotic infrarenal aortic aneurysm and an incidental asymptomatic occluded right common iliac artery. Resection and repair were completed by creating an everted, double-layered internal jugular vein patch. Screening ultrasound examination 10 months postoperatively demonstrated successful repair.
December 2017: Journal of Vascular Surgery Cases and Innovative Techniques
https://www.readbyqxmd.com/read/29349426/development-of-a-pulsatile-tissue-based-versatile-vascular-surgery-simulation-laboratory-for-resident-training
#16
Brian Fletcher, Jaime De La Ree, James Drougas
Simulation in surgery is becoming an important component of surgical education. Training on bench top models has been demonstrated to improve technical skills. The objective of our project was to create a vascular surgery simulation model. The simulation model consists of a platform, artificial blood reservoir, artificial blood, inflow and outflow limbs, electric motor, battery, pulse generator, and cryopreserved vessel. Three different vascular surgery simulation stations were created: carotid endarterectomy with shunting and patch angioplasty, arterial bypass, and arteriovenous graft formation...
December 2017: Journal of Vascular Surgery Cases and Innovative Techniques
https://www.readbyqxmd.com/read/29349375/the-use-of-bovine-pericardial-patch-for-vascular-reconstruction%C3%A2-in-infected-fields-for-transplant-recipients
#17
Sandra Garcia Aroz, Mario Spaggiari, Hoonbae Jeon, Jose Oberholzer, Enrico Benedetti, Ivo Tzvetanov
Infectious vascular complications affecting transplant recipients may lead to severe morbidity and graft loss. This is a retrospective review of vascular repair with bovine pericardial patch (BPP) in infected fields for immunosuppressed patients. BPP was used as either a patch or an interposition graft. Five cases of arterial reconstruction in infected fields using BPP were performed. There were no complications related to bleeding, thrombosis, or recurrent infection. In our limited experience, the use of BPP as a vascular patch is successful, and it represents an alternative when vascular reconstruction is needed in the context of infected fields...
March 2017: Journal of Vascular Surgery Cases and Innovative Techniques
https://www.readbyqxmd.com/read/29349368/severe-generalized-dermatitis-in-a-nickel-allergic-patient-with%C3%A2-a%C3%A2-popliteal-artery-nitinol-stent
#18
Andres Guerra, Melissa Kirkwood
We present the case of a patient who developed a full-body desquamating macular-papular, pruritic rash after endovascular placement of a popliteal artery nitinol stent for acute limb ischemia. The rash was resistant to high-dose steroid and immunosuppressive treatment and intensive topical treatment. Patch testing revealed nickel allergy. The stented arterial segment was removed, with significant improvement in his symptoms that allowed the cessation of prednisone and topical treatments. The epidemiology, pathophysiology, and clinical effect of nickel allergy are discussed in addition to the use of nickel-alloy stents...
March 2017: Journal of Vascular Surgery Cases and Innovative Techniques
https://www.readbyqxmd.com/read/29349348/the-effect-of-tulobuterol-patches-on-the-respiratory-system-after-endotracheal-intubation
#19
Do-Won Lee, Eun-Soo Kim, Wang-Seok Do, Han-Bit Lee, Eun-Jung Kim, Cheul-Hong Kim
Background: Endotracheal intubation during anesthesia induction may increase airway resistance (Raw) and decrease dynamic lung compliance (Cdyn). We hypothesized that prophylactic treatment with a transdermal β2-agonist tulobuterol patch (TP) would help to reduce the risk of bronchospasm after placement of the endotracheal tube. Methods: Eighty-two American Society of Anesthesiologists (ASA) category I or II adult patients showing obstructive patterns were divided randomly into a control and a TP group (n = 41 each)...
December 2017: Journal of Dental Anesthesia and Pain Medicine
https://www.readbyqxmd.com/read/29348171/a-cationic-c-terminal-patch-and-structural-rearrangements-in-ebola-virus-matrix-vp40-protein-control-its-interactions-with-phosphatidylserine
#20
Kathryn Del Vecchio, Cary T Frick, Jeevan B Gc, Shun-Ichiro Oda, Bernard S Gerstman, Erica Ollmann Saphire, Prem P Chapagain, Robert V Stahelin
Ebola virus (EBOV) is a filamentous lipid-enveloped virus that causes hemorrhagic fever with a high fatality rate. Viral protein 40 (VP40) is the major EBOV matrix protein and regulates viral budding from the plasma membrane. VP40 is a transformer/morpheein that can structurally rearrange its native homodimer into either a hexameric filament that facilitates viral budding or a RNA-binding octameric ring that regulates viral transcription. VP40 associates with plasma-membrane lipids such as phosphatidylserine (PS), and this association is critical to budding from the host cell...
January 18, 2018: Journal of Biological Chemistry
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