Search Results
Results 301 - 350 of 2630
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Behrens A - - 2012
OBJECTIVE: The aim of this study was to investigate whether pulsations measured in the brain correspond to those measured in lumbar space, and subsequently whether lumbar punctures could replace invasive recordings. METHODS: In ten patients with normal pressure hydrocephalus, simultaneous recordings of the intracranial pressure (ICP; intraparenchymal) and lumbar pressure ...
Eguchi Kazuo - - 2012
BACKGROUNDS: Although the European Society of Hypertension International Protocol for the validation of blood pressure (BP) measuring devices has simplified the validation protocol, it is still not feasible for use in routine clinical practice. OBJECTIVES: We sought to devise a method for validating individual home blood pressure (HBP) monitors that ...
Rinehart Joseph - - 2012
OBJECTIVE: The authors compared the performance of a group of anesthesia providers to closed-loop (Learning Intravenous Resuscitator [LIR]) management in a simulated hemorrhage scenario using cardiac output monitoring. DESIGN: A prospective cohort study. SETTING: In silico simulation. PARTICIPANTS: University hospital anesthesiologists and the LIR closed-loop fluid administration system. INTERVENTIONS: Using ...
Zweifel Christian - - 2012
BACKGROUND:: It has been postulated that Gosling's pulsatility-index (PI) assessed with transcranial Doppler (TCD) has a diagnostic value for non-invasive estimation of intracranial pressure (ICP) and cerebral perfusion pressure (CPP). OBJECTIVE:: To revisit this hypothesis using a database of digitally stored signals from a cohort of head injured patients. METHODS:: ...
Sun Jing - - 2012
AIMS: Orthostatic intolerance (OI) is a common clinical problem; however, effective and applicable clinical prevention/treatment is limited. The aim of this study was to investigate whether electroacupuncture (EA) is a novel effective treatment in attenuating OI in healthy individuals.METHODS AND RESULTS: This study used a randomized, controlled, crossover design using ...
McBride William T - - 2012
OBJECTIVE: Negative-pressure ventilation (NPV) by external cuirass (RTX; Deminax Medical Instruments Limited, London, UK) in intubated patients after cardiac surgery improves hemodynamics measured by pulmonary artery catheter (PAC)-based methods, with an increased cardiac output (CO) and stroke volume (SV), without changing the heart rate (HR). The less-invasive pressure recording analytical ...
Mizokami Fumihiro - - 2012
A pressure ulcer is a localised injury of the skin and underlying tissue that usually develops over a bony prominence. A decrease in the pressure over the bony prominence effectively prevents pressure ulcers; however, no studies have systematically assessed the physical properties of existing pressure ulcers. To characterise pressure ulcers, ...
Klingenberg Claus - - 2012
ObjectiveThe 2010 ILCOR neonatal resuscitation guidelines do not specify appropriate inflation times for the initial lung inflations in apnoeic newborn infants. The authors compared three ventilation strategies immediately after delivery in asphyxiated newborn lambs.DesignExperimental animal study.SettingFacility for animal research.SubjectsEighteen near-term lambs (weight 3.5-3.9 kg) delivered by caesarean section.InterventionsAsphyxia was induced ...
Gonzales Joshua F - - 2012
Rationale: Inspiratory rise time and cycling criteria are important settings in pressure support ventilation. The purpose of this study was to investigate the impact of minimum and maximum rise time and inspiratory cycling criteria settings on six new generation ventilators. Our hypothesis is: there will be a difference in the ...
Hu Gufeng - - 2012
A novel side-hole two-core microstructured optical fiber (STMOF) is proposed for hydrostatic pressure sensing. The two solid fiber cores are surrounded by a few small air holes and two large air holes, and are separated by one small air hole in the center of the cross section of the STMOF. ...
Fox Karin A - - 2012
OBJECTIVE: The objective of the study was to determine whether perinatal nicotine exposure adversely affects cardiovascular health in adulthood. STUDY DESIGN: C57Bl/6J female mice were randomized to 200 μg/mL nicotine in 2% saccharin or 2% saccharin alone from 2 weeks before breeding until weaning. Offspring weight, vital signs, and carotid ...
Lee I-Te - - 2012
BACKGROUND: Hypertension is a prevalent condition that is closely associated with chronic complications in patients with diabetes. Fixed-dose combination therapy is currently recommended for the treatment of hypertension due to the advantage of reducing the pill burden. However, the effects of combination therapy may be diverse because of the different ...
Borrone Roberto - - 2012
Purpose. To investigate whether there is agreement between intraocular pressure (IOP) readings in the supine position at 6 am upon awaking (before getting out of bed) and the IOP at 8 am, also measured in supine position after remaining 30 minutes in this position. Methods. In a sample of 50 ...
Mossello Enrico - - 2012
BACKGROUND: Older subjects living in nursing homes (NHs) show a high prevalence of multimorbidity, disability, and cognitive impairment. The clinical meaning of arterial hypertension (AH) in this population is unclear, and few studies have adopted ambulatory blood pressure monitoring (ABPM) with this purpose. The aims of the study were to ...
Gritti Fabrice - - 2012
The theory of gradient elution usually assumes a constant flow rate. This works extends it to gradients performed under constant pressure drop and variable flow rates. The peak capacity is derived under both constant flow rate and constant pressure gradient chromatography by integrating the rate of increase of the peak ...
Sato Shinji - - 2012
A small-sized sonochemical reactor in which the absolute value of the sound pressure amplitude can be estimated from the vibration velocity of the transducer was investigated. The sound pressure distribution in the reactor and the relationship between the vibration velocity and the sound pressure amplitude were derived through Helmholtz wave ...
Klarenbeek Pim - - 2013
Enlarged Virchow-Robin spaces (EVRS) are considered to be a sign of cerebral small vessel disease. Hypertension is an important risk factor for cerebral small vessel disease, whereas ambulatory blood pressure (BP) is the strongest predictor of hypertension-related brain damage. However, the association between ambulatory BP levels and EVRS has never ...
Lavrentieva A - - 2012
OBJECTIVE: The purpose of this study was to assess the usefulness of stroke volume variations to monitor the early fluid resuscitation in mechanically ventilated burn ICU patients. METHODS AND RESULTS: Data of 29 burn patients (APACHE II - 9.8±3.6, SAPS II - 29±5, TBSA - 39.5±14) were prospectively included in ...
Loenneke Jeremy P - - 2012
Skeletal muscle may be viewed as an endocrine organ that releases numerous factors with the potential to influence vascular tone. Previous cross-sectional studies have shown an inverse relationship between muscle mass and arterial stiffness. We examined the relationship between muscle mass, arterial pressure in the aorta and brachial artery, and ...
Laurent Alexandra - - 2012
The distribution of pressure coefficient formed when the fluid contacts with the kayak oar-blade is not been studied extensively. The CFD technique was employed to calculate pressure coefficient distribution on the front and rear faces of oar-blade resulting from the numerical resolution equations of the flow around the oar-blade in ...
Wikstrom Erik A - - 2012
The purpose of this investigation was to determine if stereotypical patterns of gait initiation are altered in those with post-traumatic ankle osteoarthritis. Ten subjects: five with unilateral ankle osteoarthritis and five uninjured controls participated. Subjects completed the SF-36 and Ankle Osteoarthritis Scale to quantify self-reported disability as well as 10 ...
Alperin N - - 2012
BACKGROUND AND PURPOSE:Impaired CSF homeostasis and altered venous hemodynamics are proposed mechanisms for elevated pressure in IIH. However, the lack of ventricular expansion steered the focus away from CSF homeostasis in IIH. This study aims to measure intracranial CSF volumes and cerebral venous drainage with MR imaging to determine whether ...
Paal Peter - - 2012
Background and aim: The majority of avalanche victims who sustain complete burial die within 35min due to asphyxia and injuries. After 35min, survival is possible only in the presence of a patent airway, and an accompanying air pocket around the face may improve survival. At this stage hypothermia is assumed ...
Miranpuri Amrendra S - - 2012
BACKGROUND: Although, the relationship of spontaneous subarachnoid hemorrhage (SAH) to climatic or circadian factors has been widely studied, epidemiologic, circardian and climatic factors in non-aneurysmal SAH (naSAH), particularly perimesencephalic SAH (PMH), has not been reported before. OBJECTIVE: For the first time, demographic, climatic, and circadian variables are examined together as ...
Rooban Nirooshan - - 2012
OBJECTIVES: Intra-abdominal pressure (IAP) is most commonly measured via the bladder with the patient in the supine position. In the ICU, patients are nursed with the head of the bed elevated at 30° (HOB30) to reduce the risk of ventilator-associated pneumonia. This study investigated whether gastric pressure at HOB30 can ...
Al-Dorzi Hasan M - - 2012
BACKGROUND: The importance of intra-abdominal pressure (IAP) and abdominal perfusion pressure (APP) in cirrhotic patients with septic shock is not well studied. We evaluated the relationship between IAP and APP and outcomes of cirrhotic septic patients, and assessed the ability of these measures compared to other common resuscitative endpoints to ...
Niiranen Teemu J - - 2012
The objective of this study is to construct an International Database of HOme blood pressure in relation to Cardiovascular Outcome (IDHOCO). The main goal of this database is to determine outcome-based diagnostic thresholds for the self-measured home blood pressure (BP). Secondary objectives include investigating the predictive value of white-coat and ...
Hirota Shinichi - - 2012
Dietary salt restriction is recommended for the prevention of cardiovascular disease in patients with hypertension and heart failure as well as in the general population. However, salt reduction is very difficult without knowing the daily salt intake of individual patients. A total of 524 subjects (72±10 year old, 246 female) ...
Soler Morejón Caridad De Dios Cde - - 2012
Although the World Society for Abdominal Compartment Syndrome in its guidelines recommends midaxillary line (MAL) as zero reference level in intra-abdominal pressure (IAP) measurements in aiming at standardizing the technique, evidence supporting this suggestion is scarce. The aim of this study is to study if the zero reference position influences ...
Cresswell Adrian B - - 2012
Current assumptions rely on intra-abdominal pressure (IAP) being uniform across the abdominal cavity. The abdominal contents are, however, a heterogeneous mix of solid, liquid and gas, and pressure transmission may not be uniform. The current study examines the upper and lower IAP following liver transplantation. IAP was measured directly via ...
Kaussen Torsten - - 2012
The purpose of the present study was to quantify bacterial translocation to mesenteric lymph nodes due to different levels of intra-abdominal hypertension (IAH; 15 vs. 30 mmHg) lasting for 24 h in a porcine model. We examined 18 anesthetized and intubated pigs (52.3 ± 4.7 kg) which were randomly allocated ...
Teramoto Tamio - - 2012
We investigated the relationship between cardiovascular disease (CVD) and the achieved blood pressure, dietary habits and the presence/absence of metabolic syndrome (MetS) in hypertensive patients treated with olmesartan medoxomil. A prospective cohort study with a 3-year follow-up was conducted in 14 721 olmesartan-naive outpatients (mean age: 64.9 years, 49.6% women) with ...
Sveegaard Steffen Gralert - - 2012
A drainage/filtration apparatus was developed for automatically determining sedimentation velocity and dewatering rate. Pressure-step testing was used to study filter cake compressibility, resistance, and swelling. Activated sludge was analysed, and the data indicate that the sludge is highly compressible even at low pressures (10 kPa). Furthermore, compressed sludge cakes swell if ...
Cleary Daniel R - - 2012
Accurate monitoring of respiration is often needed for neurophysiological studies, as either a dependent experimental variable or an indicator of physiological state. Current options for respiratory monitoring of animals held in a stereotaxic frame include EMG recordings, pneumotachograph measurements, inductance-plethysmography, whole-body plethysmography (WBP), and visual monitoring. While powerful, many of ...
Torffvit Ole - - 2012
What is the prognostic significance of achieving a systolic blood pressure of <140 mmHg? Diabetic renal policlinic, university hospital of Lund, Sweden. 118 type 2 diabetic patients with micro-macroalbuminuria were followed for four years (range 1-8 years). METHOD AND MAIN OUTCOME MEASURES: The prognostic significance of office, day- and nighttime ...
Rodriguez L - - 2012
Describe the association of internal anal sphincter (IAS) relaxation with colonic high- amplitude peristaltic contractions (HAPCs). Retrospective review of colon manometry tracings of children with constipation to determine the IAS relaxation characteristics associated with HAPC's (HAPC-IASR) events and compare them to the those seen during the performance of the anorectal ...
Sakamoto R R Department of Health Promotion and Education, School of Public Health, Loma Linda University, 24951 North Circle Drive, Loma Linda, CA 92350, - - 2013
Accumulating epidemiological and clinical studies have suggested that vitamin D insufficiency may be associated with hypertension. Blacks tend to have lower vitamin D levels than Whites, but it is unclear whether this difference explains the higher blood pressure (BP) observed in Blacks in a population with healthy lifestyle practices. We ...
Leeman Jonathan E - - 2012
Ultrasound (US) mediated microbubble (MB) destruction facilitates thrombolysis of the epicardial coronary artery in acute myocardial infarction (AMI) but its effect on microvascular thromboemboli remains largely unexplored. We sought to define the acoustic requirements for effective microvascular sonothrombolysis. To model microembolization, microthrombi were injected and entrapped in a 40 μm ...
Vikholm Per - - 2012
OBJECTIVES: Right heart failure is a major cause of morbidity and mortality after left ventricular assist device implantation and is still hard to predict. This study investigated the haemodynamic effect of a modified Glenn shunt on induced right ventricular (RV) failure. METHODS: Isolated RV failure was induced by coronary ligation ...
Kusunose Kenya - - 2012
BACKGROUND: Accurate assessment of left ventricular (LV) function in patients with atrial fibrillation (AF) remains difficult, mainly because of the beat-to-beat variability of many echocardiographic parameters. The aim of this study was to assess the hypothesis that LV function can be estimated from an index-beat echocardiographic assessment in patients with ...
Agnoletti Davide - - 2012
Obtaining pulse pressure non-invasively from applanation tonometry requires the calibration of pressure waveform with brachial systolic and diastolic blood pressure. In the literature, several calibration methodologies are applied, and clinical studies disagree about the predictive value of central hemodynamic parameters. Our aim was to compare 4 calibration methodologies and assess ...
Ogura Chika - - 2012
Sympathetic nerve activity is augmented by calcium-channel blocker treatment as a result of decreased blood pressure. Dihydropyridine calcium-channel blockers are divided into three different types. The purpose of the present study was to investigate whether treatment effects on hemodynamics, cardiac autonomic nerve activity and plasma norepinephrine levels differ among amlodipine ...
Leunissen R W J - - 2012
Aims: To investigate the effect of birth size and weight gain during childhood on blood pressure and carotid intima-media thickness (cIMT) in young adulthood. Methods: The relationship of birth size with systolic blood pressure (SBP), diastolic blood pressure (DBP), and cIMT was investigated in 243 adults, aged 18-24 years. SBP, ...
Borel Jean-Christian - - 2012
Oronasal mask (ONM) can be used when mouth leaks impair nasal-CPAP effectiveness. However, ONM's constraint on the chin and straps' traction may alter upper airway (UA) mechanical properties. In contrast, mandibular advancement device associated with nasal-CPAP (NM+MAD) may reduce UA resistance. The aim of this exploratory study was to compare ...
Morillas Pedro - - 2012
Aim. The resistive index (RI) is a hemodynamic parameter that reflects local wall extensibility and related vascular resistance. We analyze the relationship between common carotid RI and target organ damage in treated hypertensive patients. Methods. We analyzed 265 consecutive hypertensive patients. Risk factors, cardiovascular history and treatments were collected; blood ...
Seeck A - - 2012
Today atrial fibrillation (AF) is the most common cardiac arrhythmia in clinical practice accounting for approximately one third of hospitalizations and accompanied with a 5 fold increased risk for ischemic stroke and a 1.5 fold increased mortality risk. The role of the cardiac regulation system in AF recurrence after electrical ...
Larstorp Anne Cecilie K - - 2012
Previous studies have found pulse pressure (PP), a marker of arterial stiffness, to be an independent predictor of atrial fibrillation (AF) in general and hypertensive populations. We examined whether PP predicted new-onset AF in comparison with other blood pressure components in the Losartan Intervention For Endpoint reduction in hypertension study, ...
Li J Q - - 2012
The intervention of pressure therapy on management of hypertrophic scar (HS) after burn is based on the theoretical assumption that the mechanical force added onto the scar tissue will reduce the growth of myofibroblasts which create the collagen clusters and the interstitial space, and to realign fibrous tissues, thus reducing ...
Ng Keith - - 2012
OBJECTIVE:: The effect of brief, prehypertensive therapy by angiotensin-converting enzyme inhibition (ACEi) with perindopril on the structure and function of large arteries was studied in rats. METHODS:: Spontaneously hypertensive rats (SHR) received perindopril (3 mg/kg per day) between the ages of either 6 and 10 weeks (early) or 20 and 24 ...
Mizuno Reiko - - 2012
Recently, coronary microvascular function was documented to be impaired even in patients with prehypertension. However, the impact of antihypertensive level on improvement of coronary microvascular dysfunction in hypertensive patients remains to be established. We investigated the optimal blood pressure achieved with treatment of antihypertensive agents for improvement of coronary microvascular ...
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