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Bordessoule Alice - - 2012
Background:Neurally Adjusted Ventilatory Assist (NAVA) is a mode of ventilation controlled by the electrical activity of the diaphragm (Edi). The aim was to evaluate patient-ventilator interaction in infants during NAVA compared to conventional ventilation.Methods:Infants were successively ventilated with NAVA, pressure control (PCV) and pressure support (PSV). Edi and ventilator pressure ...
Fujii Naoto - - 2012
The arterial blood pressure and ventilatory responses to severe passive heating at rest varies greatly among individuals. We tested the hypothesis that the increase in ventilation seen during severe passive heating of resting humans is associated with a decrease in arterial blood pressure. Passive heating was performed on 18 healthy ...
Sweet Michael A - - 2012
BACKGROUND: A major risk factor for the development of bloodstream infection is the presence of a central venous catheter (CVC), especially in immunocompromised patients. CVC hub contamination is a risk factor for central line-associated bloodstream infection (CLABSI). METHODS: This observational before-after trial in a tertiary care hospital's oncology unit included ...
Kim Seung Hoon - - 2012
Purpose: To compare the infusion pressure shown by a vitrectomy device with the actual intraocular pressure (IOP) observed during pars plana vitrectomy. Furthermore, we evaluated the effects of variable parameters on the actual IOP during vitrectomy surgery. Materials and methods: Porcine eyes were obtained within 24 h of slaughter. Actual ...
Kasner Mario - - 2012
RATIONALE: Severe increase in right ventricular pressure can compromise left-ventricular function due to impaired interventricular interaction and aggravate the symptoms. OBJECTIVE: To elucidate how already mild/moderate idiopathic pulmonary arterial hypertension (IPAH) contributes to left-ventricular dysfunction due to impaired interventricular interaction. METHODS: Invasive pressure-volume (PV) loop analysis obtained by conductance catheterization ...
Ohta Yuko - - 2012
Blood pressure (BP) control in hypertensives has improved; however, it still remains to be insufficient. We have investigated the trend in BP control status of the hypertensive patients followed for 10 years in hypertension clinic. Subjects included 133 patients who have been followed from the first visit during 1998-2000 to ...
Poullis M - - 2012
No markers of quality of perfusion pressure and oxygen delivery during cardiopulmonary bypass (CPB), to complement rewarming rate, maximum temperature on rewarming, lowest haematocrit, and blood glucose, exist. Using the electronic acquisition of blood pressure on bypass (JOCAP system), the percentage of time perfusion pressure was below 30, 40, 50, ...
Panagiotopoulou Olga - - 2012
Foot pressure distributions during locomotion have causal links with the anatomical and structural configurations of the foot tissues and the mechanics of locomotion. Elephant feet have five toes bound in a flexible pad of fibrous tissue (digital cushion). Does this specialized foot design control peak foot pressures in such giant ...
Allegretti Ana Luiza - - 2012
There is a high incidence of pressure ulcers (PrUs) during long hours of surgery. Interface pressure and temperature are considered risk factors for PrU development. The objective of this study was to determine a methodology to measure interface pressure and temperature during long hours of surgery consistently. Five patients undergoing ...
Carll Alex P AP U.S. Environmental Protection Agency, Environmental Public Health Division, PO B143-01, Research Triangle Park, NC 27711, - - 2012
Epidemiological studies strongly link short-term exposures to vehicular traffic and particulate matter (PM) air pollution with adverse cardiovascular (CV) events, especially in those with preexisting CV disease. Diesel engine exhaust is a key contributor to urban ambient PM and gaseous pollutants. To determine the role of gaseous and particulate components ...
Rao Smita - - 2012
Regional plantar pressures during stair walking may be injurious in at risk populations. However, limited data are available examining the reliability of plantar pressure data collected during stair walking. The aims of this study were three fold; to assess the reliability of the plantar pressure data recorded during stair walking, ...
Hautamäki Hanna - - 2012
To compare the responses of heart rate and blood pressure to various autonomic tests in women with and without pre-treatment hot flushes during estradiol and estradiol+medroxyprogesterone acetate (MPA) use. Hundred and fifty recently postmenopausal women (72 with and 78 without hot flushes) were randomized to receive transdermal estradiol (1mg/day), oral ...
Vimláti L - - 2012
BACKGROUND: We investigated the haemodynamic stability of a novel porcine model of lung collapse induced by negative pressure application (NPA). A secondary aim was to study whether pulmonary shunt correlates with cardiac output (CO). METHODS: In 12 anaesthetized and relaxed supine piglets, lung collapse was induced by NPA (-50 kPa). Six ...
Vijaya Gopalan - - 2012
OBJECTIVE: To investigate changes in the oxygenated and deoxygenated haemoglobin (Hb) of the bladder wall during voluntary and involuntary detrusor contractions. STUDY DESIGN: Women with lower urinary tract symptoms were recruited from a urodynamics clinic. Near infra-red spectroscopy, a non-invasive optical technique which monitors changes in tissue oxygenation, was used ...
Donadio V - - 2012
Mental stress often begins with a sudden sensory (or internal) stimulus causing a brief arousal reaction, and is followed by a more long lasting stress phase. Both arousal and stress regularly induce blood pressure (BP) increases whereas effects on muscle sympathetic nerve activity (MSNA) are variable. Here we have compared ...
Dubose Joseph J - - 2012
INTRODUCTION: The purpose of this study was to analyze the accuracy of capillary blood glucose (CBG) against laboratory blood glucose (LBG) in critically ill trauma patients during the shock state. METHODS: All critically ill trauma patients admitted to the Surgical Intensive Care Unit at the Los Angeles County + University ...
Sanders Natalie A - - 2012
Effects of Rhythm Control on Blood Pressure. Introduction: The long-term effects of atrial fibrillation (AF) on blood pressure (BP) in patients with hypertension (HTN) remain unclear. We hypothesized that restoration of normal sinus rhythm (NSR) results in a decrease in BP despite the expected increase in cardiac output. Methods and ...
LaMarca Babbette - - 2012
Preeclampsia (PE), new-onset hypertension with proteinuria during pregnancy, is associated with increased reactive oxygen species, the vasoactive peptide endothelin-1 (ET-1), T and B lymphocytes, soluble antiangiogenic factors sFlt-1 and sEndoglin (sFlt-1 and sEng), and agonistic autoantibodies to the angiotensin II type I receptor (AT1-AA). One important area of investigation for ...
de la Oliva Pedro - - 2012
To determine if neurally adjusted ventilatory assist (NAVA) improves asynchrony, ventilatory drive, breath-to-breath variability and COMFORT score when compared to pressure support (PS). This is a non-randomized short-term cross-over trial in which 12 pediatric patients with asynchrony (auto-triggering, double triggering or non-triggered breaths) were enrolled. Four sequential 10-min periods of ...
Gosmanov Aidar R - - 2012
Hyperglycemia and elevated free fatty acids (FFA) are implicated in the development of endothelial dysfunction. Infusion of soy-bean oil-based lipid emulsion (Intralipid®) increases FFA levels and results in elevation of blood pressure (BP) and endothelial dysfunction in obese healthy subjects. The effects of combined hyperglycemia and high FFA on BP, ...
Shinojima Ari - - 2012
To reveal subtle morphological changes in the eye during simulated microgravity for spaceflights, we measured subfoveal choroidal thickness and foveal retinal thickness during 10 degrees head-down tilt (HDT). We hypothesized that elevated ophthalmic vein pressure during simulated microgravity increases subfoveal choroidal thickness via enlargement of the choroidal vasculature and greater ...
Martínez-García Paola - - 2012
Objective: Our aim was to evaluate the effect of the baroreflex mechanism upon peripheral blood volume during ympathetic stimulation by orthostatism. Methods: Nineteen clinically healthy volunteers were included (12 men), 28.4 ± 6.2 years old. Blood pressure was monitored with a Finometer and blood volume with a photoplethysmograph during supine ...
Sleutjens Janneke - - 2012
Objective-To evaluate the effect of various head and neck positions on intrathoracic pressure and arterial oxygenation during exercise in horses. Animals-7 healthy Dutch Warmblood riding horses. Procedures-The horses were evaluated with the head and neck in the following predefined positions: position 1, free and unrestrained; position 2, neck raised with ...
García de Hombre Alina M - - 2012
Negative pressure pulmonary oedema (NPPO) is an anaesthetic complication due to acute obstruction of the upper airway, whose main cause is laryngospasm. The pathophysiology involves a strong negative intrapleural pressure during inspiration against a closed glottis, which triggers excessive pressure in the pulmonary microvasculature. Although its diagnosis can be difficult, ...
Rozé H - - 2012
It is no longer safe to use large tidal volumes (V(T)) (>8 ml kg(-1)) for one-lung ventilation (OLV), and limiting plateau pressure should be a major objective. Due to the specificity of OLV, the use of positive end-expiratory pressure (PEEP) remains controversial. This study determined whether at the same low ...
Lakhal K - - 2012
OBJECTIVE: The passive leg raising maneuver (PLR) for fluid responsiveness testing relies on cardiac output (CO) measurements or invasive measurements of arterial pressure (AP) whereas the initial hemodynamic management during shock is often based solely on brachial cuff measurements. We assessed PLR-induced changes in noninvasive oscillometric readings to predict fluid ...
Tveita Torkjel - - 2012
INTRODUCTION: Due to adverse effects of β- receptor agonists reported when applied during hypothermia, left ventricular (LV) cardiac effects of milrinone, a PDE3 inhibitor which mode of action is deprived the sarcolemmal β- receptor - G protein - PKA system, was tested during cooling to 15°C. METHODS: Sprague Dawley rats ...
Briski Elizabeta - - 2012
Increasing empirical evidence indicates the number of released individuals (i.e. propagule pressure) and number of released species (i.e. colonization pressure) are key determinants of the number of species that successfully invade new habitats. In view of these relationships, and the possibility that ships transport whole communities of organisms, we collected ...
Kill Clemens - - 2012
PURPOSE OF REVIEW: Artificial ventilation is one of the best known resuscitation procedures. It is generally accepted that there must be oxygen delivery to vital organs during cardiac arrest and resuscitation in order to prevent irreversible damage, but there is an increasing number of ventilation concepts for resuscitation. Traditional and ...
Williams Erin Marie - - 2012
Modern humans possess a highly derived thumb that is robust and long relative to the other digits, with enhanced pollical musculature compared with extant apes. Researchers have hypothesized that this anatomy was initially selected for in early Homo in part to withstand high forces acting on the thumb during hard ...
Northcott Carrie A - - 2012
Within the paraventricular nucleus (PVN), there is a balance between the excitatory and inhibitory neurotransmitters that regulate blood pressure; in hypertension, the balance shifts to enhanced excitation. Nitric oxide (NO) is an atypical neurotransmitter that elicits inhibitory effects on cardiovascular function. We hypothesized that reduced PVN NO led to elevations ...
Trepte C - - 2012
BACKGROUND: /st>Cardiac output (CO) monitoring can be useful in high-risk patients during one-lung ventilation (OLV), but it is unclear whether thermodilution-derived CO monitoring is valid during OLV. Therefore, we compared pulmonary artery (CO(PATD)) and transcardiopulmonary thermodilution (CO(TPTD)) with an experimental reference in a porcine model. METHODS: /st>CO(PATD) and CO(TPTD) were ...
Breskovic Toni - - 2012
The growing urge to breathe that occurs during breath-holding results in development of involuntary breathing movements (IBMs). The present study determined whether IBMs are initiated at critical levels of hypercapnia and/or hypoxia during maximal apnoea. Arterial blood gasses at the onset of IBM were monitored during maximal voluntary breath-holds. Eleven ...
Adolfsson Peter - - 2012
Abstract Background: The performance and accuracy of the Enlite(™) (Medtronic, Inc., Northridge, CA) sensor may be affected by microbubble formation at the electrode surface during hypo- and hyperbaric conditions. The effects of acute pressure changes and of prewetting of sensors were investigated. Materials and Methods: On Day 1, 24 sensors ...
Prtenjak Maja Telišman - - 2012
We examined the atmospheric conditions favourable to the occurrence of maximum concentrations of ragweed pollen with an extremely high risk of producing allergy. Over the 2002-2009 period, daily pollen data collected in Zagreb were used to identify two periods of high pollen concentration (> 600 grains/m(3)) for our analysis: period ...
Dörfelt René - - 2012
Objective  To evaluate the influence of fentanyl on intra-abdominal pressures in spontaneously breathing dogs during capnoperitoneum. Study design  Prospective clinical study. Animals  Eleven healthy client-owned and five healthy experimental dogs undergoing laparoscopy. Methods  Dogs were premedicated with acepromazine (0.03 mg kg(-1) IV) and carprofen (4 mg kg(-1) IV). Anaesthesia was induced with propofol and ...
Jeitziner M-M - - 2012
BACKGROUND: Critically ill patients often undergo unpleasant procedures. We quantified the effects of an unpleasant stimulus on physiological and behavioral parameters and evaluated how they are modified by sedation and analgesia. METHODS: A 6-month study in the 30-bed intensive care unit (ICU) of a university hospital examined 21 sedated patients ...
Regan J - - 2012
Objective and reliable evaluation of upper esophageal sphincter (UES) opening during swallowing based on videofluoroscopy and pharyngeal manometry challenges dysphagia clinicians. The functional lumen imaging probe (FLIP) is a portable tool based on impedance planimetry originally designed to measure esophogastric junction compliance. It is hypothesized that FLIP can evaluate UES ...
Yamamoto Kazuya - - 2012
Acute hypotension during maintenance hemodialysis (HD) is not only a critical complication, but also an independent risk factor for mortality in patients with chronic renal failure (CRF). This study was designed to clarify the mechanisms underlying excessive fall of blood pressure during HD. Fifty-six CRF patients with HD thrice a ...
Heck Frauke M - - 2012
Heck FM, Doeltgen SH, Huckabee M-L. Effects of submental neuromuscular electrical stimulation on pharyngeal pressure generation. OBJECTIVE: To investigate the immediate and late effects of submental event-related neuromuscular electrical stimulation (NMES) on pharyngeal pressure generation during noneffortful and effortful saliva swallows. DESIGN: Before-after trial. SETTING: Swallowing rehabilitation research laboratory. PARTICIPANTS: ...
Cohen Mark S - - 2012
To evaluate the biomechanical alterations that occur after traditional scaphoid excision and midcarpal arthrodesis with and without excision of the triquetrum. The hypothesis of this study was that removal of the triquetrum increases the radiolunate contact pressure. We cyclically moved 10 fresh cadaver wrists using a wrist joint motion simulator ...
Singh Karen E - - 2012
A 79-year-old patient who underwent mitral valve replacement experienced prolonged elevated central venous pressure associated with poor venous return during a cardiopulmonary bypass. After the procedure, the patient was noted to have spontaneous bleeding from the left ear. Otolaryngologic examination in the operating room showed no trauma in the exterior ...
Beda Alessandro - - 2012
The physiological importance of respiratory sinus arrhythmia (RSA) and cardioventilatory coupling (CVC) has not yet been fully elucidated, but these phenomena might contribute to improve ventilation/perfusion matching, with beneficial effects on gas exchange. Furthermore, decreased RSA amplitude has been suggested as an indicator of impaired autonomic control and poor clinical ...
Ganio Matthew S - - 2012
During moderate actual or simulated hemorrhage, as cardiac output decreases, reductions in systemic vascular conductance (SVC) maintain mean arterial pressure (MAP). Heat stress, however, compromises the control of MAP during simulated hemorrhage, and it remains unknown whether this response is due to a persistently high SVC and/or a low cardiac ...
Paradis Norman A - - 2012
BACKGROUND: The fraction of cardiac arrest patients presenting with pulseless electrical activity is increasing, and it is likely that many of these patients have pseudo-electromechanical dissociation (P-EMD), a state in which there is residual cardiac contraction without a palpable pulse. The efficacy of cardiopulmonary resuscitation (CPR) with external chest compression ...
Amanpour Saeid - - 2012
PURPOSE: Although bronchoscopy can be safely performed through endotracheal tube in most intubated critically ill patients, sometimes it could lead to complications such as hypoxia and high airway pressures. Theoretically, transglottic bronchoscopy (TGB) does not interfere with mechanical ventilation and could avoid these complications. In a two-period crossover study, we ...
Kim Sang Hun - - 2012
PURPOSE: The main problem of one-lung ventilation (OLV) is hypoxemia. The use of a high tidal volume for preventing hypoxemia during OLV is controversial. We compared the effects of a high tidal volume versus a low tidal volume with or without PEEP on arterial oxygen tension (PaO(2)) and pulmonary mechanics ...
Volsko Teresa A - - 2012
BACKGROUND: Technological advances have increased ventilator mode complexity and risk of operator error. The study objective was to compare differences in volume control (VC) ventilation with set-point and dual targeting. Two hypotheses were tested; (1)VT delivery is different with VC using set-point versus dual targeting during active versus passive breathing ...
Son Jung Tae - - 2012
The purpose of this study was to examine whether drinking green tea can prevent postprandial drops in blood pressure in older adults. Participants included 29 older adults who had experienced postprandial drops in systolic blood pressure of more than 15 mmHg in a previous study. During the experimental phase, each ...
Omari Taher I - - 2012
INTRODUCTION: The measurement of the physical extent of opening of the upper esophageal sphincter (UES) during bolus swallowing has to date relied on videofluoroscopy. Theoretically luminal impedance measured during bolus flow should be influenced by luminal diameter. In this study we measured the UES nadir impedance (lowest value of impedance) ...
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