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Nichols Michael D - - 2013
In this study, the coagulation-induced resistance to flow in small-diameter nonpermeable Tygon tubes and permeable expanded polytetrafluoroethylene (ePTFE) vascular grafts was characterized by measuring the upstream pressure needed to purge the coagulum from the tube lumen. This purging pressure was monitored using a closed system that compressed the contents of ...
Gopalakrishnan Senthil - - 2013
OBJECTIVES: Various devices have been used to measure the intracuff pressure (CP) of an endotracheal tube at the time of inflation; however, no device has found widespread acceptance for the continuous monitoring of CP. We devised a simple method to continuously measure the CP using an invasive pressure monitoring setup ...
Steele Catriona M - - 2013
BACKGROUND: It is estimated that approximately 50% of stroke survivors will experience swallowing difficulty, or dysphagia. The associated sequelae of dysphagia include dehydration, malnutrition, and aspiration pneumonia, all of which have can have serious medical consequences. To improve swallowing safety and efficiency, alternative nutritional intake methods (for example, a feeding ...
Jumah Miriam J - - 2013
Impaired Eustachian tube function can limit one's fitness to dive. This study investigated the effect of minimally invasive laser Eustachian tuboplasty (laser tuboplasty) on tube function in divers and its long-term effect on their diving habits. In a prospective surgical trial in nine divers with tubal dysfunction, laser tuboplasty was ...
Nishigawa G - - 2013
OBJECTIVE: A theoretical model, based on fluid dynamics, was developed to measure impression pressure. The purpose of this study was to evaluate the validity of this theoretical model by comparing its theoretical analysis against actual pressure measurements conducted using an impression tray and edentulous oral mucosa analog embedded with pressure ...
Ferrone Giuliano - - 2013
PurposeThe aim of this study was to compare helmet-NIV (non invasive ventilation), in terms of patientventilator interaction and performance, using two different circuits for connection: a double tube circuit (with one inspiratory and one expiratory line) and a standard circuit (an Y piece connected only to one side of the ...
Minonishi Toshiyuki - - 2013
To determine whether the supine-to-prone position change displaced the endotracheal tube (ETT) and, if so, whether the displacement related to this change modified ETT cuff pressure. Prospective study. Operating room of a university hospital. 132 intubated, adult, ASA physical status 1, 2, and 3 patients undergoing lumbar spine surgery. After ...
Gaihede Michael - - 2013
Eustachian tube function is important in pressure regulation of the middle ear. The efficacy or magnitude of pressure equilibration by tube openings should be determined by the gradient between middle ear and ambient pressure, but in theory also the duration of the tube opening may play a role. This study ...
Omeroglu Gokhan - - 2013
The aim of this study is to experimentally investigate the effect of the coiled wire insertions on dynamic instabilities and to compare the results with the smooth tube for forced convection boiling. The experiments were conducted in a circular tube, and water was used as the working fluid. Two different ...
Ruan Sy - - 2013
Previous studies have shown that spontaneous breathing trials (SBT) with a T-tube or low-level pressure support are comparable. However, low-level pressure support may overestimate the ability of a patient to sustain spontaneous breathing, resulting in premature extubation. Understanding factors contributing to different responses by patients to the two SBT methods ...
Roegholt Evelien - - 2013
A T-piece resuscitator (TPR) uses a built-in manometer to set the inflation pressures, but we are not informed what pressures are actually delivered distally. Aim of this study was to measure the proximal and distal pressures under different gas conditions when using a TPR. METHODOLOGYFINDINGS: A test lung was ventilated ...
Mahmoodpoor Ata - - 2013
Because microaspiration of contaminated supraglottic secretions past the endotracheal tube cuff is considered to be central in the pathogenesis of pneumonia, improved design of tracheal tubes with new cuff material and shape have reduced the size and number of folds, which together with the addition of suction ports above the ...
Singh Saurabh - - 2013
Poiseuille's equation describes the relationship between fluid viscosity, pressure, tubing diameter, and flow, yet it is not known if cold organ perfusion systems follow this equation. We investigated these relationships in an ex vivo model and aimed to offer some rationale for equipment selection. Increasing the cannula size from 14 ...
Carter A - - 2012
To reduce the risk of tracheostomy tube blockage, a removable inner tube can be used. However, this will reduce the size of the lumen and will increase airflow resistance and work of breathing. The magnitude of this increase in workload is unknown. We undertook a bench test to measure the ...
Guo Ning - - 2012
We demonstrate an improved low-pressure chemical vapor deposition method to fabricate hexagonal boron nitride (h-BN) domains of a few layers (one-four layers) from ammonia borane by adding a small quartz tube to stabilize the gas flow over the copper substrate and reducing the growing rate of h-BN. The h-BN grows ...
Segami Y - - 2012
Objective:To measure intraoral pressure and perioral movement in infants during breastfeeding (BF) and feeding with experimental teat (ET). The teat has a wide base, firm shaft and a valve at the base, such that milk flows only when the baby provides a hold pressure.Study Design:Twenty healthy term infants, between 1 ...
Stein Howard - - 2012
The electrical activity of the diaphragm (Edi) is measured by a specialized nasogastric/orogastric tube positioned in the esophagus at the level of the crural diaphragm. Neurally adjusted ventilatory assist (NAVA) uses the Edi signal as a neural trigger and intrabreath controller to synchronize mechanical ventilatory breaths with the patient's respiratory ...
Hannezo Edouard - - 2012
We study theoretically the morphologies of biological tubes affected by various pathologies. When epithelial cells grow, the negative tension produced by their division provokes a buckling instability. Several shapes are investigated: varicose, dilated, sinuous, or sausagelike. They are all found in pathologies of tracheal, renal tubes, or arteries. The final ...
Dusick Joshua R JR Division of Neurosurgery, UCLA David Geffen School of Medicine, Los Angeles, CA, - - 2012
The complex pathophysiology of traumatic brain injury (TBI) involves not only the primary mechanical event but also secondary insults such as hypotension, hypoxia, raised intracranial pressure and changes in cerebral blood flow and metabolism. It is increasingly evident that these initial insults as well as transient events and treatments during ...
Campbell Norm - - 2012
Increased blood pressure is a leading risk for premature death and disability. The causes of increased blood pressure are intuitive and well known. However, the fundamental basis and means for improving blood pressure control are highly integrated into our complex societal structure both inside and outside our health system and ...
Fink Ericka L - - 2012
To describe the use and feasibility of cold saline to decrease body temperature in pediatric neurocritical care. Retrospective chart review. Pediatric tertiary care university hospital. Children between 1 wk and 17 yrs of age admitted to the pediatric intensive care unit with acute brain injury and having received intravenous cold ...
De Nicola Luca - - 2011
Whether nephrology management improves over time achievement of blood pressure (BP) goal (<130/<80 mm Hg) in nondialysis CKD is still ill-defined. This historical cohort analysis evaluated the relationship between 1-year nephrology management and BP control in 275 incident CKD patients in an academic renal clinic. Comparative analysis between referral and ...
Asferg Camilla - - 2011
Abstract Objective. The mechanisms by which overweight and physical inactivity lead to hypertension are complex. Leptin, an adipocyte-derived hormone, has been linked with hypertension. We wanted to investigate the relationship between leptin, physical activity and new-onset hypertension. Methods. The study was a prospective cohort study of 744 women and 367 ...
Yip Jennifer L Y JL Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom. - - 2011
To examine the relationship between physical activity and ocular perfusion pressure (OPP), a consistent risk factor for glaucoma. The relationship between previous physical activity and current OPP in 5650 participants aged 48 to 90 who attended the first (1993-1997) and third (2006-2010) health check as part of the European Prospective ...
Exo Jennifer - - 2011
To compare the correlation of intracranial pressure (ICP) measurement and time to detection of ICP crises (defined as ICP ≥ 20 mm Hg for ≥ 5 mins) between an intraparenchymal (IP) monitor and external ventricular drain (EVD) in children for whom continuous cerebrospinal fluid diversion was used as a therapy ...
Takahashi O - - 2011
Blood pressure (BP) screening is important to identify those at risk of cardiovascular disease, but there has been little data on the appropriate interval of screening. We aimed to evaluate the optimal interval and the best measure for BP re-screening by estimating the long-term, true change variance ('signal') and short-term, ...
Sookplung Pimwan P Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, WA, - - 2011
We describe institutional vasopressor usage, and examine the effect of vasopressors on hemodynamics: heart rate (HR), mean arterial blood pressure (MAP), intracranial pressure (ICP), cerebral perfusion pressure (CPP), brain tissue oxygenation (PbtO(2)), and jugular venous oximetry (SjVO(2)) in adults with severe traumatic brain injury (TBI). We performed a retrospective analysis ...
Asgari Shadnaz S Neural Systems and Dynamics Laboratory, Department of Neurosurgery, David Geffen School of Medicine, University of California, 18-265 Semel, 10833 Le Conte Avenue, Box 703919, Los Angeles, CA 90095, - - 2011
Intracranial pressure (ICP) remains a pivotal physiological signal for managing brain injury and subarachnoid hemorrhage (SAH) patients in neurocritical care units. Given the vascular origin of the ICP, changes in ICP waveform morphology could be used to infer cerebrovascular changes. Clinical validation of this association in the setting of brain ...
Chakhunashvili G - - 2011
The goal of the investigation was the estimation of functional condition of anthropometrical, physical and cardiovascular system of sportsmen-basketball players against the background of high physical loading. 100 basketball players at the age from 12 till 18 years underlay the study. Randomized and open controllable research was carried out during ...
Frese Ethel M - - 2011
Vital sign measurement and assessment are important components of the review of systems in a physical therapy examination for individuals with and without documented cardiopulmonary disease. The measurement of blood pressure gives the therapist information regarding the patient's baseline cardiovascular status, response to exercise/activity, and guides exercise prescription. Accurate measurement ...
Cheung Carol Y - - 2011
OBJECTIVE: The present study examined the effects of blood pressure on a spectrum of quantitative and qualitative retinal microvascular signs. METHODS: Retinal photographs from the Singapore Malay Eye Study, a population-based cross-sectional study of 3280 (78.7% response) persons aged 40-80 years, were analyzed. Quantitative changes in the retinal vasculature (branching ...
Jennersjö Pär E son - - 2011
To explore the association between nocturnal blood pressure (BP) dipper status and macro- and microvascular organ damage in type 2 diabetes. Cross-sectional data from 663 patients with type 2 diabetes, aged 55-66 years, were analysed. Nurses measured office BP and ambulatory BP during 24h. Individuals with ≥ 10% difference in ...
Suláková T - - 2011
Pulse pressure (PP) and ambulatory arterial stiffness index (AASI) can be calculated from ambulatory blood pressure (BP) monitoring (ABPM) and have been suggested as markers of arterial stiffness and predictors of cardiovascular mortality. We retrospectively evaluated PP and AASI from ABPM records in 84 children (43 boys) with diabetes mellitus ...
Aponte Judith - - 2011
The National Health and Nutrition Examination Survey 2003 to 2004 data set was utilized to examine trends and differences of individuals with asymptomatic and symptomatic peripheral arterial disease (PAD) and PAD risk factor variables, determined by Ankle-Brachial Index measurement. A descriptive secondary data analysis was conducted by using the variables ...
Grossman Ehud - - 2011
Hypertension is a major modifiable risk factor for cardiovascular morbidity and mortality in patients with diabetes. Lowering blood pressure (BP) to 135/85 mm Hg is the main goal of treatment. A nonpharmcologic approach is recommended in all patients. If BP levels remain above the target despite nonpharmacologic treatment, drug therapy should ...
Williams Mark E - - 2011
Lowering blood pressure may confer a benefit to diabetic microvascular complications comparable with glycemic control. Hypertension is causally related to kidney outcomes and is a risk factor for the development of diabetic retinopathy. The prevalence of hypertension increases as kidney disease progresses, so that it coexists with diabetes in up ...
Bowling Frank L - - 2011
High plantar pressures lead to ulceration in the diabetic foot, particularly in the forefoot region around the metatarsal heads. High plantar pressures persist during gait due to factors such as peripheral neuropathy, foot deformities, limited ankle dorsi flexion range of motion and reduced plantar tissue thickness. Strategies impinging upon gait ...
Apelqvist Jan - - 2011
Peripheral vascular disease (PVD) is an important limiting factor for healing in neuroischemic or ischemic diabetic foot ulcer. The purpose of this study was to identify factors related to healing in patients with diabetes with foot ulcers and severe PVD. Patients with diabetes with a foot ulcer, consecutively presenting at ...
Bhargava M - - 2011
Hypertension has profound effects on various parts of the eye. Classically, elevated blood pressure results in a series of retinal microvascular changes called hypertensive retinopathy, comprising of generalized and focal retinal arteriolar narrowing, arteriovenous nicking, retinal hemorrhages, microaneurysms and, in severe cases, optic disc and macular edema. Studies have shown ...
Kavros Steven J - - 2011
BACKGROUND: Increased plantar pressures have been shown to be a risk factor in ulceration of the neuropathic foot. Prescriptive footwear is a common medical treatment, yet evidence regarding the efficacy of these prescriptions is underdeveloped. The purpose of this study is to determine the off-loading properties of four provisional shoes; ...
Napan Sirikarn - - 2011
OBJECTIVES: Nondipping pattern of circadian blood pressure (BP) is associated with increased cardiovascular morbidity and mortality; however, limited data are available among obese African-Americans. We, therefore, aimed to evaluate the pattern of circadian BP variation and to identify clinical conditions associated with nondipping in this population. METHODS: A total of ...
Franklin Stanley S - - 2011
OBJECTIVES: To determine the features of isolated systolic hypertension (ISH), the most common hypertensive subtype in persons at least age 50, associated with greater cardiovascular disease (CVD) risk when accompanied by low diastolic blood pressure (DBP). DESIGN: Data were obtained from adult hypertensives at least age 18 in the National ...
Li Jie - - 2011
RATIONALE AND OBJECTIVES: To retrospectively analyze the significance of 3.0-T contrast-enhanced (CE) magnetic resonance angiography (MRA) with calf compression in the lower limbs of diabetic patients with peripheral vascular disease. MATERIALS AND METHODS: Sixty-one type 2 diabetes patients underwent both MRA and digital subtraction angiography (DSA) within 1 week. The patients ...
Sica Domenic - - 2011
Many small studies with varied surrogate end points and numerous preclinical data have suggested the likelihood of there being specific benefits that exceed simple blood pressure control with drug classes such as angiotensin-converting enzyme inhibitors, angiotensin receptor blockers, and calcium channel blockers, which may be particularly relevant to the patient ...
Glandt Mariela - - 2011
Treatment of blood pressure in the patient with diabetes remains a challenge. While data extrapolated from many trials seemed to imply that lower blood pressures leads to more favorable cardiovascular outcomes, this paper reviews newer trials designed to treat to blood pressure targets below 130/80 mmHg in patients with long term ...
Quinn T M - - 2011
Quinn TM, Taylor JJ, Magarik JA, Vought E, Kindy MS, Ellegala DB. Decompressive craniectomy: technical note. Acta Neurol Scand: 2011: 123: 239-244.© 2010 John Wiley & Sons A/S. Decompressive craniectomy is a neurosurgical technique in which a portion of the skull is removed to reduce intracranial pressure. The rationale for ...
Speck Verena - - 2011
We investigated the feasibility and accuracy of intracranial pressure (ICP)-measurement by lumbar drainage (LD) catheter in patients with post-hemorrhagic communicating hydrocephalus (PHCH). Patients with subarachnoid hemorrhage (SAH, n = 21) or spontaneous ganglionic hemorrhage (ICH, n = 22) with ventricular involvement and the need for external ventricular drainage (EVD) due to acute hydrocephalus were ...
Izzo Raffaele - - 2011
Left-ventricular hypertrophy (LVH) is a marker of organ damage in hypertension and helps stratifying cardiovascular risk. Initial left-ventricular mass (LVM) is also a predictor of progression to hypertension, independently of initial blood pressure (BP) and other confounders. To evaluate whether baseline LVM can influence BP control in treated hypertension. We ...
Philips Jean-Christophe - - 2011
The squatting test is an active posture manoeuvre that imposes one of the most potent orthostatic stresses. In normal subjects, the changes in blood pressure and heart rate are transient because of appropriate baroreflex homeostasis and do not provoke symptoms. However, in various pathological conditions, both the increase in blood ...
Laugesen E - - 2011
Patients with type 2 diabetes mellitus are at increased risk of cardiovascular disease (CVD). We examined the predictive ability of 24-hour ambulatory pulse pressure (24-h PP), ambulatory arterial stiffness index (AASI) and diurnal blood pressure (BP) parameters for fatal and non-fatal CVD in patients with type 2 diabetes mellitus. A ...
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