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Results 401 - 450 of 969
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Urban Frantisek - - 2010
This paper describes steps involved in the design and realization of a new type of pressure sensor based on the optical fiber Bragg grating. A traditional pressure sensor has very limited usage in heavy industrial environments, particularly in explosive or electromagnetically noisy environments. Utilization of optics in these environments eliminates ...
Gorman Peter H - - 2010
Outpatient clinic of a spinal cord injury rehabilitation center. Case report. A 40-year-old man with a 20-year history of C4 complete tetraplegia complained of 5 years of excessive intermittent left-sided sweating. The sweating occurred only in the seated upright position. There was no associated headache, blurred vision, or blood pressure ...
Lapalu Jordane - - 2010
Totally implanted ports (TIP) have become a standard part of patient care, providing long-term central venous access for treatment administration and other procedures. Despite overall the safety and effectiveness of TIP, complications still occur. Negative pressure created during needle withdrawal induces blood reflux and subsequent catheter occlusion. Application of positive ...
Effenberger Andrew J AJ Jr Idaho National Laboratory (INL), 1765 W. Yellowstone HWY, Idaho Falls, ID 83415-2208, USA. - - 2010
Laser-induced breakdown spectroscopy (LIBS) is typically performed at ambient Earth atmospheric conditions. However, interest in LIBS in other atmospheric conditions has increased in recent years, especially for use in space exploration (e.g., Mars and Lunar) or to improve resolution for isotopic signatures. This review focuses on what has been reported ...
Kim Joo-Han JH Department of Biomedical Engineering, Yonsei University, Republic of - - 2010
Heartbeat and respiration are fundamental vital signs used for estimation of patient's status. In this study, we have proposed a simple method to monitor the heartbeat and respiration based on displacements of human body which occur due to periodic heartbeat and breathing.
Donina Zh A - - 2009
Effect of posture on the hypercapnic ventilatory response was studied on the anaesthetized rats by using rebreathing techniques in the supine and head-down positions. There were no statistically significant alterations in tidal volume, frequency, minute ventilation, and P(ET)CO(2)between the head-down and supine positions during breathing at rest. However, the esophageal ...
Gordon Susan - - 2011
What effect does body position have on cardio-respiratory variables in active older people? An experimental laboratory study was undertaken measuring heart rate, systolic and diastolic blood pressure and oxygen saturation when 26 active people aged 60 years and over adopted five standardized body positions. Measurements were taken every 2 min ...
Georgiou C - - 2010
To investigate the proposed mechanism by which intrauterine balloons achieve their tamponade effect of creating an 'intrauterine pressure that is greater than the systemic arterial pressure'. To determine the intraluminal pressures within a Bakri balloon during the establishment of a positive 'tamponade test' in the management of postpartum haemorrhage. To ...
Sagar Sam S - - 2009
This study investigated how aspects of perfectionism in athletes (N = 388) related to the fears of failure proposed by Conroy et al. (2002), and how perfectionism and fears of failure predicted positive and negative affect after imagined success and failure in sports competitions. Results showed that perfectionistic personal standards ...
Tang Clarice Y - - 2010
OBJECTIVES: To examine the effectiveness of chest physiotherapy for patients admitted to hospital with an acute exacerbation of chronic obstructive pulmonary disease (COPD). DATA SOURCE: CINAHL, MEDLINE, Embase, Cochrane, Expanded Academic Index, Clinical Evidence, PEDro, Pubmed, Web of Knowledge and Proquest were searched from the earliest available time to September ...
Paddock Natasha - - 2009
Complete inversion of the body in a seated position may occur in exceptional circumstances such as in overturned vehicles and during military maneuvers, with direct consequences on health and fatalities. However, the physiological responses to this condition have not been published previously. The purpose of this study was to compare ...
Cheatham Michael L - - 2009
OBJECTIVE: Elevated intra-abdominal pressure (IAP) is a frequent cause of morbidity and mortality among the critically ill. IAP is most commonly measured using the intravesicular or "bladder" technique. The impact of changes in body position on the accuracy of IAP measurements, such as head of bed elevation to reduce the ...
Chuckpaiwong B - - 2009
INTRODUCTION: Doing repetitive push-ups is among the most common exercise for the upper body and shoulder stabiliser muscle strength training. However, adverse effects such as neck pain, back pain, palmar pain and wrist pain have been reported. To date, to our knowledge, palmar pressure when performing push-ups has not been ...
Pimenta Eduardo - - 2009
The renin-angiotensin-aldosterone system (RAAS) is a key mediator of blood pressure (BP) and volume regulation in both normotensive and hypertensive persons. Stimulation of RAAS also contributes to hypertension-related target organ damage. The renin-angiotensinogen reaction is the first and rate-limiting step in the generation of angiotensin II (Ang II) and has ...
Brummett B H BH Department of Psychiatry, Duke University Medical Center, Durham, North Carolina 27710, USA. - - 2009
Positive affect was examined as a predictor of (1) cardiovascular reactivity during a sadness and an anger recall task and recovery following the protocol, (2) epinephrine (EPI) and norepinephrine (NOREPI) reactivity and level during the recall protocol, and (3) the diurnal pattern of salivary cortisol. Sample was 328 individuals. Negative ...
Russell W J - - 2009
The effect of intermittent positive airway pressure to the non-ventilated lung was assessed in 10 patients who desaturated during one-lung ventilation. Once their saturation fell below 95% they were given a slow inflation of 2 l/min of oxygen into the non-ventilated lung for two seconds. This was repeated every 10 ...
De Keulenaer B L BL Fremantle Hospital, Intensive Care, Fremantle, Western Australia (WA), Australia. - - 2009
Intra-abdominal pressure (IAP) has traditionally been measured in the supine position, however, measuring the pressure in lateral semi-recumbent position has not been studied. A single centre prospective 1-day study. 10 patients admitted for more then 24 hours who were mechanically ventilated and had an indwelling urinary catheter. Inclusion criteria included ...
Morishita Yuichiro - - 2009
STUDY DESIGN: The clinical relationship between the local pressure of the intervertebral foramen and the clinical findings in lumbar spinal canal stenosis were evaluated. OBJECTIVE: To investigate the pathogenesis of neurogenic intermittent claudication in lumbar spinal canal stenosis. SUMMARY OF BACKGROUND DATA: The genesis of neurogenic intermittent claudication is generally ...
De Keulenaer B L - - 2009
PURPOSE: To describe what is defined as normal intra-abdominal pressure (IAP) and how body positioning, body mass index (BMI) and positive end-expiratory pressure (PEEP) affect IAP monitoring. METHODS: A review of different databases was made (Pubmed, MEDLINE (January 1966-June 2007) and EMBASE.com (January 1966-June 2007)) using the search terms of ...
Tempelhof Michael W - - 2009
This report describes an elderly patient evaluated for generalized fatigue, dyspnea, presyncopal episodes, and positional hypoxemia. Workup revealed posturally related oxygen desaturation, a patent foramen ovale (PFO), an atrial septal aneurysm, and primary adrenal insufficiency. Normal intracardiac pressures and a right-to-left PFO shunt were present only while the patient was ...
Topouzis Fotis - - 2009
The role of vascular risk factors in glaucoma is increasingly being supported by the literature, with the association between low ocular perfusion pressure (PP) and glaucoma being the most consistent result. However, we need to be cautious when interpreting these results and consider all possible confounders in the observed associations. ...
Ekmark Elaine McGarr - - 2009
The purpose of this article is to provide an overview of skin issues in children with spina bifida. Included in the discussion below is a review of the etiology of pressure ulcers and the updated 2007 pressure ulcer definition and pressure ulcer staging system as defined by the National Pressure ...
Kato Koji - - 2009
The RTX respirator is a biphasic external cuirass-style ventilator that supports both inspiration and expiration at various cycle rates and pressures, as well as allowing application of the vibration and cough modes. With this respirator, the duration and pressure can be altered in both the inspiratory and expiratory phases, and ...
Carpes Felipe Pivetta - - 2009
OBJECTIVE: There is a common belief that seat pressure during cycling can compress specific neurovascular tissues over the perineum leading to genital pathologies. This topic has seldom been discussed for women. The present study was conducted to verify the effect of trunk position and saddle design on saddle pressure in ...
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 ...
Strauss Gregory P GP University of Nevada, Las Vegas, - - 2009
Previous research demonstrates that the attentional system is capable of redirecting focus to threatening information under periods of pressure. This bias may enable specific action tendencies capable of initiating thoughts and actions that promote adaptive life functions. However, relatively little is known about whether the attentional system is biased to ...
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 ...
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