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systemic filling pressure

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https://www.readbyqxmd.com/read/29783039/the-influence-of-bone-cement-and-american-society-of-anesthesiologists-asa-class-on-cardiovascular-status-during-bipolar-hemiarthroplasty-for-displaced-femoral-neck-fracture-a-multicenter-prospective-case-control-study
#1
Shuichi Miyamoto, Junichi Nakamura, Satoshi Iida, Tomonori Shigemura, Shunji Kishida, Isao Abe, Munenori Takeshita, Makoto Otsuka, Yoshitada Harad, Sumihisa Orita, Seiji Ohtori
BACKGROUND: Little is known about how bone cement and American Society of Anesthesiologists (ASA) classification influence the cardiovascular system in elderly patients with femoral-neck fractures treated with cemented hemiarthroplasty. Therefore, we performed a case-control study to investigate these questions and compared the following: 1) ≥ASA III with ≤ASA II patients who underwent cemented hemiarthroplasty; 2) cemented with cementless hemiarthroplasty in ≥ASA III patients. HYPOTHESIS: ASA classification influences the cardiovascular system during cemented hemiarthroplasty and bone cement influences intraoperative blood pressure [IBP] in patients rated ≥ASA III...
May 18, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29779995/factors-predicting-postoperative-febrile-urinary-tract-infection-following-percutaneous-nephrolithotomy-in-prepubertal-children
#2
Onur Kaygısız, Nihat Satar, Ali Güneş, Hasan Serkan Doğan, Ahmet Erözenci, Ender Özden, Mehmet Mesut Pişkin, Deniz Demirci, Serdar Toksöz, Tufan Çiçek, Serhat Gürocak, Hakan Kılıçarslan, Oktay Nazlı, Aykut Kefi, Volkan İzol, Ali Beytur, Şaban Sarıkaya, Serdar Tekgül, Bülent Önal
BACKGROUND: Predictive tables and scoring systems can predict stone clearance. However, there is a paucity of evidence regarding the prediction of complications during percutaneous nephrolithotomy (PCNL), particularly in children, which remains under-researched. To our knowledge, no studies have evaluated the risk factors for febrile urinary tract infection (FUTI) after pediatric PCNL. OBJECTIVES: To assess the predictive factors of FUTI in prepubertal children after PCNL and determine whether any prophylactic cephalosporins are superior for decreasing the FUTI rate...
May 5, 2018: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/29772397/grandmother-and-health-care-professional-breastfeeding-perspectives-provide-opportunities-for-health-promotion-in-an-american-indian-community
#3
Bailey Houghtaling, Carmen Byker Shanks, Selena Ahmed, Elizabeth Rink
RATIONALE: While breastfeeding is well recognized as beneficial, rates of breastfeeding among American Indian women are below average and contribute to health inequities. Culturally specific approaches to breastfeeding research are called for to inform appropriate interventions in American Indian communities. Specifically, a grandmother's role in breastfeeding promotion is of great import particularly in American Indian (AI) groups, although is an understudied topic to date. OBJECTIVE: This research seeks to fill a prominent literature gap by utilizing a grounded theory and community-based research approach to inform breastfeeding practices from the voices of grandmothers and health care professionals in a rural AI community in the United States...
May 8, 2018: Social Science & Medicine
https://www.readbyqxmd.com/read/29757966/cnt-foam-embedded-micro-gas-preconcentrator-for-low-concentration-ethane-measurements
#4
Janghyeon Lee, Si-Hyung Lim
Breath analysis has become increasingly important as a noninvasive process for the clinical diagnosis of patients suffering from various diseases. Many commercial gas preconcentration instruments are already being used to overcome the detection limits of commercial gas sensors for gas concentrations which are as low as ~100 ppb in exhaled breath. However, commercial instruments are large and expensive, and they require high power consumption and intensive maintenance. In the proposed study, a micro gas preconcentrator (μ-PC) filled with a carbon nanotube (CNT) foam as an adsorbing material was designed and fabricated for the detection of low-concentration ethane, which is known to be one of the most important biomarkers related to chronic obstructive pulmonary disease (COPD) and asthma...
May 14, 2018: Sensors
https://www.readbyqxmd.com/read/29757656/multilevel-morphology-of-complex-nanoporous-materials
#5
Ahmad Motahari, Naiping Hu, Amir Vahid, Abdollah Omrani, Abbas Ali Rostami, Dale W Schaefer
This work exploits gas adsorption and small-angle X-ray scattering (SAXS) to illuminate morphology of complex nanoporous materials. We resolve multiple classes of porosity including previously undetected large-scale texture that significantly compromises the canonical interpretation of gas adsorption. Specifically, a UVM-7 class mesoporous silica was synthesized that has morphological features on three length scales: macropores due to packing of 150-nm globules, 1.9-nm-radius spherical mesopores inside the globules and >7-nm pockets on and between the globules...
May 14, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29738798/rapid-automated-process-development-of-a-continuous-capsule-filling-process
#6
Bernhard Wagner, Thomas Brinz, Stephanie Otterbach, Johannes Khinast
This paper introduces a rapid automated process-development approach for a continuous capsule-filling process. In our proposed method, both the material attributes and the critical process parameters were varied to understand and to optimize the overall process. Using our approach a statistical process model can be generated with unprecedented speed (2 days), which is the prerequisite for effectively developing and operating continuous process platforms. In a first set of experiments a process model was developed using different mixture compositions of ascorbic acid, lactose and magnesium stearate while changing simultaneously the critical process parameters of the capsule filler (speed, pressure, immersion depth and powder bed height)...
May 5, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29737842/an-ultrahigh-co-2-loaded-silicalite-1-zeolite-structural-stability-and-physical-properties-at-high-pressures-and-temperatures
#7
Tomas Marqueño, David Santamaria-Perez, Javier Ruiz-Fuertes, Raquel Chuliá-Jordán, Jose L Jordá, Fernando Rey, Chris McGuire, Abby Kavner, Simon MacLeod, Dominik Daisenberger, Catalin Popescu, Placida Rodriguez-Hernandez, Alfonso Muñoz
We report the formation of an ultrahigh CO2 -loaded pure-SiO2 silicalite-1 structure at high pressure (0.7 GPa) from the interaction of empty zeolite and fluid CO2 medium. The CO2 -filled structure was characterized in situ by means of synchrotron powder X-ray diffraction. Rietveld refinements and Fourier recycling allowed the location of 16 guest carbon dioxide molecules per unit cell within the straight and sinusoidal channels of the porous framework to be analyzed. The complete filling of pores by CO2 molecules favors structural stability under compression, avoiding pressure-induced amorphization below 20 GPa, and significantly reduces the compressibility of the system compared to that of the parental empty one...
May 8, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29729484/high-efficiency-dual-cycle-conversion-system-using-kr-85
#8
Mark A Prelas, Modeste Tchakoua Tchouaso
This paper discusses the use of one of the safest isotopes known isotopes, Kr-85, as a candidate fuel source for deep space missions. This isotope comes from 0.286% of fission events. There is a vast quantity of Kr-85 stored in spent fuel and it is continually being produced by nuclear reactors. In using Kr-85 with a novel Dual Cycle Conversion System (DCCS) it is feasible to boost the system efficiency from 26% to 45% over a single cycle device while only increasing the system mass by less than 1%. The Kr-85 isotope is the ideal fuel for a Photon Intermediate Direct Energy Conversion (PIDEC) system...
April 26, 2018: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/29723777/circulating-macrophage-migration-inhibitory-factor-mif-in-patients-with-heart-failure
#9
Peter Luedike, Georgios Alatzides, Maria Papathanasiou, Martin Heisler, Julia Pohl, Nils Lehmann, Tienush Rassaf
BACKGROUND: Heart failure (HF) is characterized by impaired systolic ejection capacity and/or diastolic filling of the heart, leading to a multisystem disorder. Remote organ failure, systemic inflammation or pulmonary hypertension (PH) are hallmarks of the pathophysiological changes in HF. The Macrophage migration inhibitory factor (MIF) is a pro-inflammatory cytokine that is involved in a variety of cardiovascular and inflammatory diseases. Circulating MIF levels and their potential role as a disease marker in the different subgroups of HF have not been investigated yet...
April 30, 2018: Cytokine
https://www.readbyqxmd.com/read/29722225/-characteristics-of-co-2-flux-and-its-influence-factors-over-winter-wheat-agroecosystem-in-the-north-china-plain
#10
Dong Xing Wu, Guo Dong Li, Qiong Qiong Kang, Xi Zhang, Zi Hao Cao, Zhen Li
Using CO2 flux data of winter wheat recorded by eddy covariance system, combined with the meteorological data, we examined the diurnal variations of CO2 fluxes in four growth stages (tillering stage, overwintering stage, jointing stage and filling stage) of winter wheat in an agroecosystem of the North China Plain from 2013 to 2014. The seasonal variation of net ecosystem exchange and its relationship with meteorological factors were investigated. The results showed that the net ecosystem exchange in the whole growing season was -360...
March 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29721645/midazolam-increases-preload-dependency-during-endotoxic-shock-in-rabbits-by-affecting-venous-vascular-tone
#11
Jianxiao Chen, Tao Yu, Federico Longhini, Xiwen Zhang, Songqiao Liu, Ling Liu, Yi Yang, Haibo Qiu
BACKGROUND: Septic patients often require sedation in intensive care unit, and midazolam is one of the most frequently used sedatives among them. But the interaction between midazolam and septic shock is not known. The aim of this study is to investigate the effects of midazolam on preload dependency in an endotoxic shock model by evaluating systemic vascular tone and cardiac function. METHODS: Eighteen rabbits were randomly divided into three groups: Control group, MID1 group and MID2 group...
May 2, 2018: Annals of Intensive Care
https://www.readbyqxmd.com/read/29715645/fouling-resilient-perforated-feed-spacers-for-membrane-filtration
#12
Sarah Kerdi, Adnan Qamar, Johannes S Vrouwenvelder, Noreddine Ghaffour
The improvement of feed spacers with optimal geometry remains a key challenge for spiral-wound membrane systems in water treatment due to their impact on the hydrodynamic performance and fouling development. In this work, novel spacer designs are proposed by intrinsically modifying cylindrical filaments through perforations. Three symmetric perforated spacers (1-Hole, 2-Hole, and 3-Hole) were in-house 3D-printed and experimentally evaluated in terms of permeate flux, feed channel pressure drop and membrane fouling...
April 24, 2018: Water Research
https://www.readbyqxmd.com/read/29694776/apparent-softening-of-wet-graphene-membranes-on-a-microfluidic-platform
#13
Gustavo A Ferrari, Alan B de Oliveira, Ive Silvestre, Matheus J S Matos, Ronaldo J C Batista, Thales F D Fernandes, Leonel M Meireles, Gomes S N Eliel, Helio Chacham, Bernardo R A Neves, Rodrigo G Lacerda
Graphene is regarded as the toughest two-dimensional material (highest in-plane elastic properties) and, as a consequence, it has been employed/proposed as an ultrathin membrane in a myriad of microfluidic devices. Yet, an experimental investigation of eventual variations on the apparent elastic properties of a suspended graphene membrane in contact with air or water is still missing. In this work, the mechanical response of suspended monolayer graphene membranes on a microfluidic platform is investigated via scanning probe microscopy experiments...
April 27, 2018: ACS Nano
https://www.readbyqxmd.com/read/29692447/issues-and-opportunities-on-implementing-an-online-faculty-review-system
#14
Brian L Erstad, Maliaca G Oxnam, Tom P Miller, JoLaine R Draugalis
Intensifying accountability pressures have led to an increased attention to assessments of teaching, but teaching generally represents only a portion of faculty duties. Less attention has been paid to how evaluations of faculty members can be used to gather data on teaching, research, clinical work, and outreach to integrate clinical and academic contributions and fill in information gaps in strategic areas such as technology transfer and commercialization where universities are being pressed to do more. Online reporting systems can enable departments to gather comprehensive data on faculty activities that can be aggregated for accreditation assessments, program reviews, and strategic planning...
April 2018: American Journal of Pharmaceutical Education
https://www.readbyqxmd.com/read/29682266/bone-regeneration-in-aesthetic-areas-using-titanium-micromesh-three-case-reports
#15
A Scarano, B Assenza, A DI Cerbo, V Candotto, P Santos DE Oliveira, F Lorusso
Purpose: An adequate bone volume for complete circumferential coverage of the implants is very important for obtaining a long-term success of oral implants. To avoid these problems various membranes and biomaterials were used, but soft tissue pressure could cause a membrane collapse toward the defect. The present work describes a ridge augmentation with titanium mesh shaped by adapting it to a bone defect in aesthetic areas. Materials and methods: Three patients with alveolar crest defects received three implants (Bone System, Milano, Italy) and the defects were filled with bone chips...
October 2017: Oral & Implantology
https://www.readbyqxmd.com/read/29677073/outcomes-after-cardiac-transplant-for-wild-type-transthyretin-amyloidosis
#16
Andrew N Rosenbaum, Omar F Abou Ezzeddine, Martha Grogan, Angela Dispenzieri, Sudhir Kushwaha, Alfredo Clavell, Richard C Daly, Brooks S Edwards
BACKGROUND: The true prevalence of heart failure (HF) due to wild type transthyretin amyloidosis (ATTRwt) is likely underestimated. There is a paucity of data with regard to the management of ATTRwt-related advanced HF and the natural history of extracardiac ATTRwt. METHODS: We conducted a retrospective cohort study of patients undergoing cardiac transplant (HTx) for ATTRwt at a single institution. Comprehensive clinical data, including baseline hemodynamic and echocardiographic characteristics, and posttransplant outcomes were obtained...
April 19, 2018: Transplantation
https://www.readbyqxmd.com/read/29668375/evaluation-of-pelvis-postural-systems-in-spinal-cord-injury-patients-outcome-research
#17
Serena Dattoli, Mariele Colucci, Maria Grazia Soave, Rita De Santis, Leandro Segaletti, Claudia Corsi, Marco Tofani, Donatella Valente, Giovanni Galeoto
OBJECTIVES: Compare three commercially available postural systems to determine the best for treatment of patients suffering from spinal cord injury lesion below the cervical spine. DESIGN: Outcome Research. SETTING: Ambulatory. PARTICIPANTS: Thirteen patients were recruited for this study between March 2016 and July 2016 from the Occupational Therapy clinic of "Policlinico Umberto I" hospital in Rome and Occupational Therapy of "CPO" hospital in Ostia...
April 18, 2018: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/29664007/invasion-of-gas-into-mica-nanopores-a-molecular-dynamics-study
#18
Chao Fang, Fei Zhang, Rui Qiao
Invasion of gas into liquid-filled nanopores is encountered in many engineering problems but is not yet well understood. We report molecular dynamics simulations of the invasion of methane gas into water-filled mica pores with widths of 2-6nm. Gas invades into a pore only when the pressure exceeds a breakthrough pressure and a thin residual water film is left on the mica wall as the gas phase moves deeper into the pore. The gas breakthrough pressure of pores as narrow as 2nm can be modeled reasonably well by the capillary pressure if the finite thickness of residual liquid water film and the liquid-gas interface are taken into account...
April 17, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29650784/under-pressure-comparison-of-aspiration-techniques-for-endovascular-mechanical-thrombectomy
#19
O Nikoubashman, D Wischer, H M Hennemann, M Büsen, C Brockmann, M Wiesmann
BACKGROUND AND PURPOSE: Blood flow should be interrupted during mechanical thrombectomy to prevent embolization of clot fragments. The purpose of our study was to provide a handy overview of the most common aspiration devices and to quantify their flow characteristics. MATERIALS AND METHODS: We assessed volumetric flow rates generated by a 60-mL VacLok vacuum pressure syringe, a Pump MAX aspiration pump, and a Dominant Flex suction pump connected to the following: 1) an 8F long sheath, 2) an 8F balloon-guide catheter, 3) an ACE 64 distal aspiration catheter, and 4) an AXS Catalyst 6 Distal Access Catheter...
April 12, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29629260/acute-right-ventricular-failure-postintubation-in-a-mitral-stenosis-patient
#20
Sridhar Reddy Musuku, Saroj Pani, John Cagino
Mitral stenosis (MS) is prevalent in 0.02-0.2% of the population in developed countries. The pathophysiology of MS results in elevated left atrial pressures and over-time results in pulmonary hypertension (HTN) which ultimately affects the right ventricle. In addition, MS restricts the diastolic filling of the left ventricle. Therefore, during induction patients with MS are limited by their ability to increase cardiac output by increasing stroke volume. Anesthesia goals in severe MS are to avoid sudden changes in heart rate, as well as systemic and pulmonary artery pressures...
January 2018: Journal of Cardiovascular Echography
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