Search Results
Results 401 - 450 of 943
< 4 5 6 7 8 9 10 11 12 13 14 >
Fogelberg Donald - - 2009
Individuals with spinal cord injury (SCI) use wheelchairs for mobility and for full participation in their daily activities. The use of wheelchairs, however, can increase the risk of pressure ulcers. This study focused on wheelchair users' perceptions of the interplay between their wheeled mobility and the development of pressure ulcers ...
Susic Dinko - - 2009
This brief review deals with some novel developments regarding the possible role of salt in the pathogenesis of cardiovascular and renal disorders. Studies in both humans and experimental animals are discussed. Increased salt intake is usually associated with an increase in arterial pressure although some controversies still exist. Salt sensitivity ...
Re Richard N - - 2009
Obesity-associated arterial hypertension is characterized by activation of the sympathetic nervous system, activation of the renin-angiotensin system, and sodium retention, among other abnormalities. In this review, the following 3 facets of the obesity/hypertension nexus will be discussed: the potential mechanisms by which obesity can lead to elevated arterial pressure, the ...
Rowe William J - - 2009
Space flight (SF) and dust inhalation in habitats cause hypertension whereas in SF (alone) there is no consistent hypertension but reduced diurnal blood pressure (BP) variation instead. Current pharmaceutical subcutaneous delivery systems are inadequate and there is impairment in the absorption, metabolism, excretion, and deterioration of some pharmaceuticals. Data obtained ...
Clipp Rachel B - - 2009
With few exceptions, previous models of the pulmonary vascular system have neglected the effects of respiration. This practice is acceptable for normal cardiac function; however, for compromised function, respiration may be critical. Therefore, we have initiated the steps to develop boundary conditions that incorporate the effects of respiration through the ...
T-M Wei W Department of Cardiology, Lishui City Central Hospital and the Fifth Affiliated Hospital of Wenzhou Medical College, Lishui, Zhejiang Province, 3 23000, PR - - 2008
Controversies exist on the nature of influence of body position on the level of blood pressure. This study was designed to investigate the impact of postures on blood pressures in healthy subjects. Blood pressure was measured in 6,485 healthy subjects in both supine and sitting positions, using a standard mercury ...
Hills Rachel W - - 2008
Emergency physicians are frequently called on to remove impacted nasal foreign bodies in children. Multiple positive pressure techniques for the removal of nasal foreign bodies have been described. This case report details a previously unreported complication of barotrauma after the use of a published positive pressure technique that uses unmodulated ...
McMichael Jessica Cole - - 2008
STUDY DESIGN: Pilot Study. OBJECTIVE: The objective of this study was to compare face tissue pressures for 3 different prone head positioners in healthy, conscious individuals in the prone position. SUMMARY OF BACKGROUND DATA: The incidence of intraoperatively acquired pressure ulcers has been reported to range from 12% to 66%; ...
Salihoglu Ziya - - 2008
BACKGROUND AND OBJECTIVE: The aim of this study was to evaluate the effects of pneumoperitoneum and patient positioning on respiratory mechanics and blood gases in chronic obstructive pulmonary disease (COPD) patients during laparoscopic Nissen fundoplication. METHODS: After the approval of the Ethical Committee, 32 patients were divided into 2 groups ...
Sosna Jacob - - 2008
OBJECTIVE: The purpose of this study was to prospectively evaluate the effect of the order of positions on sustained rectal pressure and factors affecting pain perceived by patients during air-insufflated CT colonography. SUBJECTS AND METHODS: Rectal pressure was measured in the supine and prone positions for CT colonography of 379 ...
Huang Zhiqun - - 2008
Weed control may improve the growth of forest plantations by influencing soil water and nutrient availability, but our knowledge of leaf-level physiological responses to weed control at different within-canopy positions is limited for tropical and subtropical plantations. Foliar carbon (delta(13)C) and oxygen (delta(18)O) isotope compositions, gas exchange, and nitrogen (N(mass)) ...
Aftanas L I - - 2008
The aim of the present work was to identify possible associations between individual balances in the activity of the positive and negative reinforcement motivation systems using a method based on emotional modulation of the startle reaction (EMSR) by motivationally significant emotionally positive and negative contextual visual stimuli and measures of ...
Villoria Albert - - 2008
BACKGROUND AND AIM: We previously showed that colonic gas infusion increases the girth and modifies the muscular activity of the anterior abdominal wall. We hypothesized that abdominal accommodation to volume loads is an active process instrumented by the coordinated activity of the anterior wall and the diaphragm. METHODS: To increase ...
Hockett Jeffrey L - - 2008
The aim of this in vitro study was to determine whether irrigation with apical negative pressure was more effective than traditional positive-pressure irrigation in eradicating Enterococcus faecalis from preshaped root canals. Fifty-four extracted mandibular molars were instrumented to produce either a non-tapered or tapered preparation, sterilized, inoculated with E. faecalis ...
Kobara Kenichi - - 2008
PURPOSE: For some people with leg disorders, the alternative to becoming bedridden is sitting in a wheelchair for long periods of time. The purpose of this study was to investigate the relation between the backrest of a chair and the position of the pelvis on the maximum pressure at the ...
Pham V M - - 2008
We performed a study on 32 idiopathic scoliotic patients (30 females, 2 males) treated with a Chêneau brace. Eighteen patients had a single right thoracic curve and 14 had a single right thoracolumbar curve. We used the TekScan system (ClinSeat Type 5315 Sensor, TekScan, Boston MA, USA) to measure pressures ...
Hazell Tom J - - 2008
The purpose of this study was to determine the effect of vertical whole-body vibration (WBV) on heart rate (HR), mean arterial pressure (MAP), femoral artery blood flow (FBF), and leg skin temperature (LSk(temp)) during static exercise. These parameters were examined: seated next to the WBV device (passive, unloaded), with feet ...
Lee Hak J - - 2008
PURPOSE: The use of effective vascular clamps is key to successful laparoscopic partial nephrectomy. Based on our clinical experience the occlusive capabilities of vascular clamps appeared to be quite variable. We compared the occlusive force of currently available laparoscopic vascular clamps. MATERIALS AND METHODS: The jaw force of 3 laparoscopic ...
Richard Jean-Christophe - - 2008
OBJECTIVES: Prone positioning is frequently used during acute respiratory distress syndrome. However, mechanisms by which it improves oxygenation are poorly understood, as well as its interaction with positive end-expiratory pressure. This study was conducted to decipher the respective effects of positive end-expiratory pressure and posture during lung injury on regional ...
Lencioni Valeria - - 2008
The effects of temperature and oxygen saturation on the respiration rate of two cold stenothermal chironomids, Diamesa insignipes and Pseudodiamesa branickii were investigated. Fourth instar larvae were collected in winter in a glacio-rhithral stream (1300 m a.s.l., Alps, NE-Italy) and their respiration rate was measured with a Clark's electrode in ...
Deane Leslie A - - 2008
BACKGROUND AND PURPOSE: There have been several reports of rhabdomyolysis occurring after prolonged laparoscopic procedures in the flank position. Accordingly, we evaluated interface pressures between the skin and three commonly used operating room table surfaces. The aim of our study was to determine if pressure changes could be related to ...
Haneef Zulfi - - 2008
Ocular compression (OC) is a maneuver performed during EEG to demonstrate increased vagal reactivity in children with suspected syncope including breath-holding spells. We examined the relationship between the simulated OC pressure exerted by different physicians and the cardiac slowing responses that they had historically obtained as per EEG records. Simulated ...
Takada Jun-Ichi - - 2008
OBJECTIVE: To determine the effect of an imbalance in buccolingual pressure that may be involved in molar dental compensation in the mandible and asymmetry of the dental arch in subjects with facial asymmetry. MATERIALS AND METHODS: We performed simultaneous measurement of the buccolingual pressure on the mandibular right first molar ...
Demura Shinichi - - 2008
This study aimed to examine the effects of room temperature and body position changes on cerebral blood volume, blood pressure and center-of-foot pressure (COP). Cerebral oxygenation kinetics and blood pressure were measured by near infrared spectroscopy (NIRS) and volume-compensation, respectively, in 9 males and 9 females after rapid standing from ...
Yano Toshiyuki - - 2008
We compared the intracuff pressure (ICP) of a laryngeal mask airway (LMA) in the lateral and prone positions with that in the supine position. One hundred and eight patients, weighing 50-70 kg, scheduled for elective orthopedic and plastic surgery, were assigned to three groups, based on their body position during ...
Keller Geoffray - - 2008
INTRODUCTION: Pleth Variability Index (PVI) is a new algorithm that allows continuous and automatic estimation of respiratory variations in the pulse oximeter waveform amplitude. Our aim was to test its ability to detect changes in preload induced by passive leg raising (PLR) in spontaneously breathing volunteers. METHODS: We conducted a ...
Khalfa Stéphanie - - 2008
Respiration rate allows to differentiate between happy and sad excerpts which may be attributable to entrainment of respiration to the rhythm or the tempo rather than to emotions [Etzel, J.A., Johnsen, E.L., Dickerson, J., Tranel, D., Adolphs, R., 2006. Cardiovascular and respiratory responses during musical mood induction. Int. J. Psychophysiol. ...
Falabella Andres - - 2007
BACKGROUND: Haemodynamic changes associated with pneumoperitoneum and steep Trendelenburg position were investigated in non-obese, ASA I-II males, using general anaesthesia (sevoflurane in air/O2, 40%) undergoing robotic-assisted laparoscopic prostatectomy. METHODS: A trans-oesophageal echo-Doppler probe (Arrow International) measured cardiovascular changes in heart rate (HR), mean arterial pressure (MAP), cardiac output (CO), systemic ...
Thekkinkattil Dinesh K - - 2007
PURPOSE: Anorectal manometry is commonly used to investigate fecal incontinence. Traditional practice dictates that measurements are performed with the patient in the left-lateral position however, episodes of fecal incontinence usually occur in the erect position. The influence of erect posture on anorectal manometry has not been studied. METHODS: We examined ...
Krauza M L - - 2007
The purpose of this study was to examine the possibility that body position influences inspiratory airflow of submerged subjects. Our previous studies have suggested that for a given (negative) inspired gas pressure, exercising divers experience more dyspnea in the prone than in the upright position. METHODS: Six subjects performed maximal ...
Tsunoda Akira - - 2007
The dual switch valve (DSV), which switches between two parallel valve chambers depending on the patient posture, was evaluated in 101 consecutive adult patients with hydrocephalus who required shunt surgery. The opening pressure was 5 or 10 cmH(2)O for the supine position and 30 or 40 cmH(2)O for the upright ...
Leek Bryan T - - 2007
BACKGROUND: Acute compartment syndrome has been an underreported complication during spine surgery with the patient positioned on the so-called 90/90 kneeling frame (with 90 degrees of both hip and knee flexion), presumably because of elevated intramuscular pressures in the dependent leg compartments. The purpose of the present study was to ...
Oda T - - 2007
We have studied the ζ-phase of solid oxygen using the generalized gradient approximation in the density functional approach. Calculations of total energies and pressures have been carried out for the prototype of diatomic ζ-phase and other hypothetical monoatomic crystal structures. The diatomic phase was found to be stable over a ...
Brazhkin V V - - 2007
We present the in situ high-pressure-high-temperature x-ray diffraction study of the liquid AlCl(3) and ZnCl(2) halogenides having a quasi-molecular network structure in liquid state at normal pressure. These liquids are intermediate between pure covalent and ionic melts. Structural study of these liquid halogenides is indicative of a rapid and strong ...
Green N D C - - 2007
Forearm pain occurring during high +Gz exposure has been linked with vascular distension from elevated transmural pressure of hydrostatic origin and is exacerbated by positive pressure breathing (PBG). We postulated that at high vascular transmural pressure vascular autoregulation might be overcome and be associated with worsened pain. Six volunteers were ...
McBeth Paul B - - 2007
BACKGROUND: Intra-abdominal hypertension affects multiple organ systems. Current measurement standard requires supine positioning, which jeopardizes patient safety by increasing the risk for ventilator-associated pneumonia. This study evaluated the relationship between intra-abdominal pressure (IAP) and head-of-bed (HOB) positioning in critically ill intubated patients. METHODS: IAP measurements were performed using intravesical catheters ...
Soga Junko - - 2007
BACKGROUND: Measurement of flow-mediated vasodilation (FMD) is used to assess endothelial function in humans and according to the guidelines, subjects must remain supine during the study. However, measurement of FMD while seated would be more comfortable and convenient for patients, so the purpose of this study was to determine the ...
Wang Wei - - 2007
Poststenting restenosis is a significant clinical problem that involves vascular smooth muscle cell (VSMC) proliferation. We primarily investigated the effect of c-myc antisense oligodeoxynucleotides (ASODNs) combined with 188Re radiation therapy on VSMC proliferation in rabbit common iliac arteries injured by the porous balloon catheter to explore the therapeutic potential of ...
Bisceglia M - - 2007
AIM: Nasal continuous positive airway pressure and nasal intermittent positive pressure ventilation have both been proposed as a form of gentle respiratory support for neonatal respiratory distress syndrome. We have compared these two respiratory support methods in the management of early stages of mild-moderate, neonatal respiratory distress syndrome. METHODS: A ...
Huang Georgeanna J - - 2007
Abdominoplasty is associated with a 1.1 percent risk of deep venous thrombosis. This has been attributed to rectus plication causing intraabdominal hypertension, known to effect decreased venous return, venous stasis, and thus thrombosis. The authors conducted a pilot study to determine which components of the abdominoplasty procedure (i.e., general anesthesia, ...
Tsuiki S - - 2007
Neck extension because of contraction of cervical extensor muscles often brings about a lower-positioned tongue secondary to jaw opening in patients with congenital myopathy (CM). We hypothesized that neck extension in control subjects would reproduce the lower position of the tongue similar to that found in a CM patient. A ...
Schellongowski Peter - - 2007
OBJECTIVE: To establish whether prolonged lateral steep position during continuous rotation therapy leads to improvement on pulmonary gas exchange, respiratory mechanics and hemodynamics. DESIGN: Prospective observational study. SETTING: Intensive care unit of a university hospital. PATIENTS: Twelve consecutive patients suffering from acute lung injury or adult respiratory distress syndrome undergoing ...
Kotani K - - 2007
OBJECTIVES: The objective of our study is to investigate extrinsic influences on heart rate variability using respiratory-phase domain analysis. Swallowing, coughing and vocalization (reading aloud and conversation) are adopted as extrinsic influences. METHODS: In this study, an instantaneous R-R interval (RRI) is sampled at each pi/10 rad of the respiratory ...
Jaccard Yves - - 2007
Recently silver fiber-containing compression stockings for the use in patients with chronic venous insufficiency (CVI) were introduced to the market. In order to gain some first insight into the effects of these new fabrics on the cutaneous microcirculation, a double-blind, randomized cross-over trial was performed in 10 healthy volunteers. A ...
E┼čer Ismet - - 2007
AIM: The aim of the present study was to test the effects of different body on BP readings in a Turkish healthy young adults. BACKGROUND: It is known that many factors influence an individual's blood pressure measurement. However, guideliness for accurately measuring blood pressure inconsistently specify that patient's position and ...
Weiss Elisabeth - - 2007
To investigate temporospatial variations of tumor and normal tissue during respiration in lung cancer patients. METHODS AND MAterials: In 14 patients, gross tumor volume (GTV) and normal tissue structures were manually contoured on four-dimensional computed tomography (4D-CT) scans. Structures were evaluated for volume changes, centroid (center of mass) motion, and ...
Kopácová Marcela - - 2007
It has been hypothesized that Helicobacter pylori (Hp) infection may contribute to reduced stature, risk of hypertension or obesity. The aim was to evaluate body indices in Hp positive and negative persons. A total of 2436 subjects (4-100 years old) were tested for Hp status by (13)C-urea breath test. Data ...
Chow T T - - 2006
The severe acute respiratory syndrome (SARS) crisis led to the construction of a negative pressure operating theatre at a hospital in Hong Kong. It is currently used for treatment of suspected or confirmed airborne infection cases, and was built in anticipation of a return of SARS, an outbreak of avian ...
Agashe Geeta S - - 2006
BACKGROUND: This study investigated whether a tensioning headband that applies up to 20 mmHg pressure over a forehead pulse oximetry sensor could improve arterial hemoglobin oxygen saturation reading accuracy in presence of venous pooling and pulsations at the forehead site. METHODS: Healthy volunteers were studied breathing room air in supine ...
Rao Satish S C - - 2006
BACKGROUND: Whether defecation is influenced by body position or stool characteristics is unclear. AIM: We investigated effects of body position, presence of stool-like sensation, and stool form on defecation patterns and manometric profiles. METHODS: Rectal and anal pressures were assessed in 25 healthy volunteers during attempted defecation either in the ...
< 4 5 6 7 8 9 10 11 12 13 14 >