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https://www.readbyqxmd.com/read/27913147/electro-kinetically-driven-peristaltic-transport-of-viscoelastic-physiological-fluids-through-a-finite-length-capillary-mathematical-modelling
#1
Dharmendra Tripathi, Ashu Yadav, O Anwar Bég
Analytical solutions are developed for the electro-kinetic flow of a viscoelastic biological liquid in a finite length cylindrical capillary geometry under peristaltic waves. The Jefferys' non-Newtonian constitutive model is employed to characterize rheological properties of the fluid. The unsteady conservation equations for mass and momentum with electro-kinetic and Darcian porous medium drag force terms are reduced to a system of steady linearized conservation equations in an axisymmetric coordinate system...
November 29, 2016: Mathematical Biosciences
https://www.readbyqxmd.com/read/27910055/selective-pressure-regulated-retroinfusion-for-gene-therapy-application-in-ischemic-heart-disease
#2
Rabea Hinkel, Christian Kupatt
Coronary heart disease is still the leading cause of death in industrialized nations. Even though revascularization strategies such as coronary artery bypass graft surgery, percutaneous coronary intervention and enhanced drug therapy significantly improved the outcome, about 30 % of patients develop chronic heart failure. Ischemic heart disease and heart failure are characterized by an adverse remodeling of the heart, featuring cardiomyocyte hypertrophy, increased fibrosis and capillary rarefaction. Therefore, gene therapeutic approaches for the treatment of heart failure, such as the modulating contractile function or therapeutic neovascularization, seem to be promising...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27908340/end-points-of-sepsis-resuscitation
#3
REVIEW
John C Greenwood, Clinton J Orloski
Resuscitation goals for the patient with sepsis and septic shock are to return the patient to a physiologic state that promotes adequate end-organ perfusion along with matching metabolic supply and demand. Ideal resuscitation end points should assess the adequacy of tissue oxygen delivery and oxygen consumption, and be quantifiable and reproducible. Despite years of research, a single resuscitation end point to assess adequacy of resuscitation has yet to be found. Thus, the clinician must rely on multiple end points to assess the patient's overall response to therapy...
February 2017: Emergency Medicine Clinics of North America
https://www.readbyqxmd.com/read/27904840/surgical-experience-on-chronic-constrictive-pericarditis-in-african-setting-review-of-35-years-experience-in-cote-d-ivoire
#4
Koffi Herve Yangni-Angate, Yves Tanauh, Christophe Meneas, Florent Diby, Anicet Adoubi, Manga Diomande
BACKGROUND: Surgical experience with chronic constrictive pericarditis (CCP) is rarely documented in Africa; the aim of this study is therefore to review our African experience with CCP from 1977 to 2012 in terms of clinical and surgical outcomes and risk factors of early death after pericardiectomy. METHODS: This retrospective study is related to 120 patients with CCP; there were 72 men and 48 women with an average age at 28.8±10.4 years standard deviation (SD) (8-51 years)...
October 2016: Cardiovascular Diagnosis and Therapy
https://www.readbyqxmd.com/read/27903671/sports-related-lung-injury-during-breath-hold-diving
#5
Tanja Mijacika, Zeljko Dujic
The number of people practising recreational breath-hold diving is constantly growing, thereby increasing the need for knowledge of the acute and chronic effects such a sport could have on the health of participants. Breath-hold diving is potentially dangerous, mainly because of associated extreme environmental factors such as increased hydrostatic pressure, hypoxia, hypercapnia, hypothermia and strenuous exercise.In this article we focus on the effects of breath-hold diving on pulmonary function. Respiratory symptoms have been reported in almost 25% of breath-hold divers after repetitive diving sessions...
December 2016: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/27901159/a-portable-and-reconfigurable-multi-organ-platform-for-drug-development-with-onboard-microfluidic-flow-control
#6
J R Coppeta, M J Mescher, B C Isenberg, A J Spencer, E S Kim, A R Lever, T J Mulhern, R Prantil-Baun, J C Comolli, J T Borenstein
The drug development pipeline is severely limited by a lack of reliable tools for prediction of human clinical safety and efficacy profiles for compounds at the pre-clinical stage. Here we present the design and implementation of a platform technology comprising multiple human cell-based tissue models in a portable and reconfigurable format that supports individual organ function and crosstalk for periods of up to several weeks. Organ perfusion and crosstalk are enabled by a precision flow control technology based on electromagnetic actuators embedded in an arrayed format on a microfluidic platform...
November 30, 2016: Lab on a Chip
https://www.readbyqxmd.com/read/27894390/-effects-of-different-fluid-resuscitation-program-on-renal-function-in-swine-during-shock-stage-of-severe-burn
#7
G L Su, W X Huang, J Chen, D J Xue, J J Zhou
Objective: To explore the effects of different fluid resuscitation program on renal function in swine during shock stage of severe burn. Methods: Twenty-four Guangxi Bama miniature swine were inflicted with 40% total body surface area on the back, and then they were divided into four groups according to the random number table, with 6 swine in each group. At post injury hour (PIH) 2, swine in succinylated gelatin group (S), hydroxyethyl starch group (H), and allogeneic plasma group (A) were respectively resuscitated with succinylated gelatin, hydroxyethyl starch 130/0...
November 20, 2016: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/27894122/b-cell-lymphoma-2-modified-bone-marrow-derived-mesenchymal-stem-cells-transplantation-for-the-treatment-of-diabetes-mellitus-induced-erectile-dysfunction-in-a-rat-model
#8
Xiang Sun, Long-Hua Luo, Liang Feng, Dong-Shui Li, Ke-Zhao Zhong
OBJECTIVE: The study aimed to explore the effects of B cell lymphoma-2 (Bcl-2)-modified bone marrow-derived mesenchymal stem cells (BMSCs) transplantation for the treatment of diabetes mellitus-induced erectile dysfunction (DMED) in a rat model. METHODS: The DMED rat model was successfully established. Thirty-six DMED rats were assigned into the Bcl-2-BMSCs, null-BMSCs, BMSCs and phosphate buffered saline (PBS) groups. Meanwhile, 9 normal rats injected with PBS were taken as the normal control group...
November 29, 2016: Urologia Internationalis
https://www.readbyqxmd.com/read/27894069/association-between-left-atrial-dilatation-and-invasive-hemodynamics-at-rest-and-during-exercise-in-asymptomatic-aortic-stenosis
#9
Nicolaj Lyhne Christensen, Jordi Sanchez Dahl, Rasmus Carter-Storch, Rine Bakkestrøm, Kurt Jensen, Flemming Hald Steffensen, Eva Vad Søndergaard, Lars Videbæk, Jacob Eifer Møller
BACKGROUND: Transition from an asymptomatic to symptomatic state in severe aortic stenosis is often difficult to assess. Identification of a morphological sign of increased hemodynamic load may be important in asymptomatic aortic stenosis to identify patients at risk. METHODS AND RESULTS: Thirty-nine patients with asymptomatic severe aortic stenosis (aortic valve area <1 cm(2), peak jet velocity >3.5 m/s) underwent exercise testing with simultaneous invasive hemodynamic monitoring and Doppler echocardiography...
October 2016: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/27893186/the-relative-influence-of-hematocrit-and-red-blood-cell-velocity-on-oxygen-transport-from-capillaries-to-tissue
#10
Adrien Lücker, Timothy W Secomb, Bruno Weber, Patrick Jenny
OBJECTIVE: Oxygen transport to parenchymal cells occurs mainly at the microvascular level, and depends on convective red blood cell (RBC) flux, which is proportional in an individual capillary to the product of capillary hematocrit and red blood cell velocity. This study investigates the relative influence of these two factors on tissue oxygen partial pressure (PO2 ). METHODS: A simple analytical model is used to quantify the respective influences of hematocrit, RBC velocity and flow on tissue oxygenation around capillaries...
November 28, 2016: Microcirculation: the Official Journal of the Microcirculatory Society, Inc
https://www.readbyqxmd.com/read/27886759/capillary-electrophoresis-tandem-mass-spectrometry-combined-with-molecularly-imprinted-solid-phase-extraction-as-useful-tool-for-the-monitoring-of-5-nitroimidazoles-and-their-metabolites-in-urine-samples
#11
Maykel Hernández-Mesa, Carmen Cruces-Blanco, Ana M García-Campaña
A novel capillary electrophoresis-tandem mass spectrometry approach is proposed for the determination of eleven 5-nitroimidazoles in urine samples for therapeutical drug monitoring purposes. A comparison between two separation modes, namely micellar electrokinetic chromatography and capillary zone electrophoresis was carried out, obtaining higher selectivity when 1M formic acid (pH 1.8) was selected as background electrolyte. 5-Nitroimidazoles were hydrodynamically injected in water for 40s at 50mbar and their separation was performed at 28kV and 25°C...
January 15, 2017: Talanta
https://www.readbyqxmd.com/read/27884796/can-the-measurement-of-pulmonary-diffusing-capacity-for-nitric-oxide-replace-the-measurement-of-pulmonary-diffusing-capacity-for-carbon-monoxide
#12
Gerald S Zavorsky, Ivo van der Lee
Pulmonary diffusing capacity for carbon monoxide (DLCO) has been an important pulmonary function test used since the 1950's. It measures the uptake of CO from the alveolar space into pulmonary capillary blood, following the same path as oxygen. It's used to evaluate/follow the progress of various lung diseases. In the eighties, a new test was developed similar to the DLCO test: pulmonary diffusing capacity for nitric oxide (DLNO). About 81-90% of the variance in DLNO is shared by DLCO in patients with cardiopulmonary disease and in healthy subjects...
November 21, 2016: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/27875533/pulmonary-arterial-capacitance-predicts-cardiac-events-in-pulmonary-hypertension-due-to-left-heart-disease
#13
Koichi Sugimoto, Akiomi Yoshihisa, Kazuhiko Nakazato, Yuichiro Jin, Satoshi Suzuki, Tetsuro Yokokawa, Tomofumi Misaka, Takayoshi Yamaki, Hiroyuki Kunii, Hitoshi Suzuki, Shu-Ichi Saitoh, Yasuchika Takeishi
BACKGROUND: Although pulmonary hypertension due to left heart disease (LHD-PH) accounts for the largest proportion of pulmonary hypertension, few reports on the epidemiological analysis of LHD-PH exist. Recently, pulmonary arterial capacitance (PAC) has attracted attention as a possible factor of right ventricular afterload along with pulmonary vascular resistance. We therefore investigated the clinical significance of PAC in LHD-PH. METHODS: The subject consisted of 252 LHD-PH patients (145 men, mean age 63...
2016: PloS One
https://www.readbyqxmd.com/read/27874085/silicon-deposition-in-nanopores-using-a-liquid-precursor
#14
Takashi Masuda, Narihito Tatsuda, Kazuhisa Yano, Tatsuya Shimoda
Techniques for depositing silicon into nanosized spaces are vital for the further scaling down of next-generation devices in the semiconductor industry. In this study, we filled silicon into 3.5-nm-diameter nanopores with an aspect ratio of 70 by exploiting thermodynamic behaviour based on the van der Waals energy of vaporized cyclopentasilane (CPS). We originally synthesized CPS as a liquid precursor for semiconducting silicon. Here we used CPS as a gas source in thermal chemical vapour deposition under atmospheric pressure because vaporized CPS can fill nanopores spontaneously...
November 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27867733/multi-wavelength-photoplethysmography-method-for-skin-arterial-pulse-extraction
#15
Jing Liu, Bryan Ping-Yen Yan, Wen-Xuan Dai, Xiao-Rong Ding, Yuan-Ting Zhang, Ni Zhao
In this work, we present a multi-wavelength (MW) PPG method exploiting the wavelength dependence of light penetration in skin tissue to provide depth resolution of skin blood pulsation. The MW PPG system requires two to three light sources in different wavelengths and extracts the arterial blood pulsation through a multi-wavelength multi-layer light-skin interaction model, which removes the capillary pulsation (determined from the short-wavelength PPG signal) from the long-wavelength PPG signal using absorption weighting factors that are quasi-analytically calibrated...
October 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/27867292/new-impella-cardiac-power-device-used-in-patient-with-cardiogenic-shock-due-to-nonischemic-cardiomyopathy
#16
Marek Cena, Frances Karam, Rajesh Ramineni, Wissam Khalife, Alejandro Barbagelata
The new percutaneous Impella CP (Cardiac Power; Abiomed, Inc., Danvers, MA) was designed to provide a higher level of support than Impella 2.5 (Abiomed, Inc.). We present the first documented case of a patient that was transitioned from the Impella 2.5 to Impella CP. A 48-year-old male patient with no medical history was transferred to our institution with a one day history of worsening shortness of breath. The patient was unstable and found to have monomorphic ventricular tachycardia at 220 beats/min that was cardioverted to normal sinus rhythm...
December 2016: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/27855238/adrenal-crisis-secondary-to-bilateral-adrenal-haemorrhage-after-hemicolectomy
#17
Anthony Logaraj, Venessa H M Tsang, Shahrir Kabir, Julian C Y Ip
: Adrenal haemorrhage is a rare cause of adrenal crisis, which requires rapid diagnosis, prompt initiation of parenteral hydrocortisone and haemodynamic monitoring to avoid hypotensive crises. We herein describe a case of bilateral adrenal haemorrhage after hemicolectomy in a 93-year-old female with high-grade colonic adenocarcinoma. This patient's post-operative recovery was complicated by an acute hypotensive episode, hypoglycaemia and syncope, and subsequent computed tomography (CT) scan of the abdomen revealed bilateral adrenal haemorrhage...
2016: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/27852653/one-year-outcomes-after-transcatheter-insertion-of-an-interatrial-shunt-device-for-the-management-of-heart-failure-with-preserved-ejection-fraction
#18
David M Kaye, Gerd Hasenfuß, Petr Neuzil, Martijn C Post, Robert Doughty, Jean-Noël Trochu, Adam Kolodziej, Ralf Westenfeld, Martin Penicka, Mark Rosenberg, Antony Walton, David Muller, Darren Walters, Jorg Hausleiter, Philip Raake, Mark C Petrie, Martin Bergmann, Guillaume Jondeau, Ted Feldman, Dirk J van Veldhuisen, Piotr Ponikowski, Frank E Silvestry, Dan Burkhoff, Christopher Hayward
BACKGROUND: Heart failure with preserved ejection fraction has a complex pathophysiology and remains a therapeutic challenge. Elevated left atrial pressure, particularly during exercise, is a key contributor to morbidity and mortality. Preliminary analyses have demonstrated that a novel interatrial septal shunt device that allows shunting to reduce the left atrial pressure provides clinical and hemodynamic benefit at 6 months. Given the chronicity of heart failure with preserved ejection fraction, evidence of longer-term benefit is required...
December 2016: Circulation. Heart Failure
https://www.readbyqxmd.com/read/27836420/-introduction-of-capillary-glycosylated-haemoglobin-determination-in-a-primary-care-health-area-multicentre-study-of-the-evolution-of-patients-with-type-2-diabetes-mellitus
#19
M Á Núñez-Sánchez, M Á Cervantes-Cuesta, P Brocal-Ibañez, E Salmeron-Arjona, L P León-Martínez, M Cerezo-Sanmartin
PURPOSE: The aim of this study was to evaluate the efficiency of a joint intervention that included educational components, self-assessment, and information to optimise diabetes control through the introduction of instant capillary glycosylated haemoglobin (HbA1c) determination in Primary Care. MATERIALS AND METHODS: A multicentre prospective descriptive study was carried out over 3years in 10Primary Care Centres of the Area VII Murcia East. At the end of the study there were 804 patients with type 2 diabetes (DM2)...
November 8, 2016: Revista de Calidad Asistencial: Organo de la Sociedad Española de Calidad Asistencial
https://www.readbyqxmd.com/read/27835048/furosemide-in-postpartum-management-of-severe-preeclampsia-a-randomized-controlled-trial
#20
P Veena, Lakshmideepthi Perivela, S Soundara Raghavan
BACKGROUND: Hypertension in the postpartum period is a common phenomenon and is often a cause for concern. Following delivery, fluid that has been sequestered in the extravascular space is mobilized, producing a large auto-infusion of fluid from the extravascular to the intravascular compartment. As a result of this fluid mobilization process, there is an increase in central venous pressure and pulmonary capillary wedge pressure, which might favor the development of pulmonary edema. Thus, diuretics logically might be a better choice as antihypertensive medication in such a scenario...
November 11, 2016: Hypertension in Pregnancy
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