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Miedinger David - - 2010
BACKGROUND: Breathing dry, cold air may cause bronchoconstriction in asthmatics working with self-contained breathing apparatus (SCBA). Air delivered by SCBA is cooler than ambient air. It is unclear whether a bronchial challenge test using mannitol (BCTM) can predict a fall in forced expiratory volume in one second (FEV(1)) during exercise ...
Tomich Georgia Miranda - - 2010
To evaluate breathing pattern and thoracoabdominal motion during breathing exercises. Twenty-four patients with class II or III obesity (18 women; 6 men) were studied on the second postoperative day after gastroplasty. The mean age was 37 +/- 11 years, and the mean BMI was 44 +/- 3 kg/m(2). Diaphragmatic breathing, ...
Lamberg Eric M - - 2010
Clear evidence links voluntary breath control, intra-abdominal pressure and lumbar stability. However, little is known regarding optimal breath control during manual materials handling. No studies have examined natural breath control while lifting a maximal load. Fourteen healthy subjects lifted a loaded crate from the floor to a table while respiratory ...
Carlo Capelli - - 2011
This article summarises the pros and cons of different algorithms developed for estimating breath-by-breath (B-by-B) alveolar O(2) transfer ([Formula: see text]) in humans. [Formula: see text] is the difference between O(2) uptake at the mouth and changes in alveolar O(2) stores (∆VO(2s)), which for any given breath, are equal to ...
Gimenez Manuel - - 2010
OBJECTIVE: To compare the effects of comprehensive directed breathing retraining with traditional diaphragmatic breathing on male smokers with exertional dyspnea but normal spirometry. DESIGN: This is a prospective randomized clinical trial in an exercise laboratory at a university hospital. Twenty-four nonmedicated exertional dyspnea subjects were randomly assigned to experimental (comprehensive ...
Robergs Robert A - - 2010
There is currently no universally recommended and accepted method of data processing within the science of indirect calorimetry for either mixing chamber or breath-by-breath systems of expired gas analysis. Exercise physiologists were first surveyed to determine methods used to process oxygen consumption ((.)VO2) data, and current attitudes to data processing ...
Rousseau A - - 2010
Hyperoxia causes vasoconstriction in most tissues, by mechanisms that are not fully understood. We investigated microvascular effects of breathing 100% oxygen in healthy volunteers, using iontophoresis to deliver acetylcholine (ACh) and sodium nitroprusside (SNP). Aspirin and vitamin C were used to test for involvement of prostaglandins and radical oxygen species. ...
Padkao Tadsawiya - - 2010
Does a new positive expiratory pressure device (conical-PEP) decrease lung hyperinflation during exercise in patients with chronic obstructive pulmonary disease compared to normal breathing? Does it increase the duration of exercise? A randomised, cross-over trial with concealed allocation. Thirteen patients with moderate to severe chronic obstructive pulmonary disease (mean FEV1 ...
Padkao Tadsawiya - - 2010
Question: Does a new positive expiratory pressure device (conical-PEP) decrease lung hyperinflation during exercise in patients with chronic obstructive pulmonary disease compared to normal breathing? Does it increase the duration of exercise? Design: A randomised, cross-over trial with concealed allocation. Participants: Thirteen patients with moderate to severe chronic obstructive pulmonary ...
Lema?tre Fr?d?ric - - 2010
The physiological responses to apnea training exhibited by elite breath-hold divers may contribute to improving sports performance. Breath-hold divers have shown reduced blood acidosis, oxidative stress and basal metabolic rate, and increased hematocrit, erythropoietin concentration, hemoglobin mass and lung volumes. We hypothesise that these adaptations contributed to long apnea durations ...
Spungen Ann M - - 2009
Blunted ventilatory responses to carbon dioxide indicate that respiratory control is impaired when ventilation is stimulated in individuals with tetraplegia; however, respiratory control during resting breathing has not been extensively studied in this population. Our objective was to evaluate respiratory control and sigh frequency during resting breathing in persons with ...
Lykidis Christos K - - 2010
In this study, we aimed to assess the ventilatory and cardiovascular responses to the combined activation of the muscle metaboreflex and the ventilatory chemoreflex, achieved by postexercise circulatory occlusion (PECO) and euoxic hypercapnia (end-tidal partial pressure of CO2 7 mmHg above normal), respectively. Eleven healthy subjects (4 women and 7 ...
Landberg Tobias - - 2009
It is reasonable to presume that locomotion should have a mechanical effect on breathing in turtles. The turtle shell is rigid, and when the limbs protract and retract, air in the lungs should be displaced. This expectation was met in a previous study of the green sea turtle, Chelonia mydas; ...
Balaban Dahlia Y - - 2009
BACKGROUND: Ventilatory muscle endurance training (VMET) involves increasing minute ventilation (V (E)) against a low flow resistance at rest to simulate the hyperpnea of exercise. Ideally, VMET must maintain normocapnia over a wide range of V (E). This can be achieved by providing a constant fresh gas flow to a ...
Sivasankar Mahalakshmi - - 2009
OBJECTIVES/HYPOTHESIS: Inhaled air must be adequately humidified to prevent vocal fold drying, which is detrimental to phonation. The water content of inspired air is reduced by parameters, such as increased breathing rate and oral route. Accelerated oral breathing challenges induce airway dehydration and are posited to affect airway function. The ...
Mourya Monika - - 2009
OBJECTIVES: Breathing exercises practiced in various forms of meditations such as yoga may influence autonomic functions. This may be the basis of therapeutic benefit to hypertensive patients. DESIGN: The study design was a randomized, prospective, controlled clinical study using three groups. SUBJECTS: The subjects comprised 60 male and female patients ...
Merget R - - 2009
To date, there is little information in the literature that hypersensitivity pneumonitis due to birds may occur without direct contact to birds. A 62-yr-old pensioner developed mild flu-like symptoms, fatigue and polyuria several hours after each meeting with his new female partner, either in hotels or his apartment. After divorcing ...
Kalsås Knud - - 2009
Perceived breathlessness at comparable minute ventilation (V(E)) is higher with cycling than with running. Different use of the upper extremities and chest wall may influence the breathing pattern. It was hypothetized that the relationship between tidal volume (V(T)) and V(E) throughout progressive incremental exercise is different with the two modes ...
Renault Julia Alencar - - 2009
To compare the effects of deep breathing exercises (DBE) and the flow-oriented incentive spirometry (IS) in patients undergone coronary artery bypass grafting (CABG) through the following variables: forced vital capacity - FVC, forced expiratory volume in 1 second - FEV(1), maximal respiratory pressures and oxygen saturation. Thirty six patients in ...
Lafond Danik - - 2009
The aims of this study were to evaluate the influence of breathing when measuring lumbar postural control during a clinical progressive lumbar stabilization test (LST) and to estimate the intrasession reliability of the LST. The lumbar postural control index was calculated by using a biofeedback pressure unit. The LST was ...
Bridgeman Bruce - - 2010
Performing Kegel exercises following prostatectomy is helpful in restoring continence, but requires concentration to accomplish the required contractions consistently. Confusion and effort with executing the procedure can reduce compliance. A new method subdivides the exercises into segments that can be executed without counting. The patient performs four sets of contractions ...
Kjeld Thomas - - 2009
The diving response is initiated by apnea and facial immersion in cold water and includes, besides bradycardia, peripheral vasoconstriction, while cerebral perfusion may be enhanced. This study evaluated whether facial immersion in 10 degrees C water has an independent influence on cerebral perfusion evaluated as the middle cerebral artery mean ...
Hårdemark Cedborg Anna I - - 2009
Co-ordination of breathing and swallowing is essential for normal pharyngeal function and to protect the airway. To allow for safe passage of a bolus through the pharynx, respiration is interrupted (swallowing apnoea); however, the control of airflow and diaphragmatic activity during swallowing and swallowing apnoea are not fully understood. Here, ...
Whyte Gregory - - 2009
Collapse after prolonged endurance exercise is common and usually benign. This case study reports a triathlete who suffered a vaso-vagal associated collapsed after exercise. Misdiagnosis of myocardial injury in the presence of elevated cardiac troponins and ECG anomalies led to inappropriate management and highlights the difficulty in treating the collapsed ...
Dhar Sanjay Kumar - - 2009
We report the case of a 58-year-old Caucasian woman with severe symptoms attributable to hypertrophic obstructive cardiomyopathy (HOCM). When supine there was no significant left ventricular outflow tract (LVOT) gradient on echocardiography or cardiac catheter measurements-despite provocation with supine leg exercise and right ventricular pacing. However, semi-supine bicycle exercise induced ...
Tawa Hiroki H Department of Health science, Hiroshima Institute of Technology, Hiroshima 731-5193, Japan. - - 2009
We have developed a new wireless breathing-training support system for kinesitherapy. The system consists of an optical sensor, an accelerometer, a microcontroller, a Bluetooth module and a laptop computer. The optical sensor, which is attached to the patient's chest, measures chest circumference. The low frequency components of circumference are mainly ...
Bell Harold J - - 2009
Augmented breaths promote respiratory instability and have been implicated in triggering periods of sleep-disordered breathing. Since respiratory instability is well known to be exacerbated by hypocapnia, we asked whether one of the destabilizing effects of hypocapnia might be related to an increased prevalence of augmented breaths. With this question in ...
Roberge Marc R - - 2008
OBJECTIVE: To determine if using an N95 filtering face-piece respirator concurrently with a loose-fitting powered air-purifying respirator (PAPR) offers additional protection to the wearer. METHODS: We used a breathing mannequin programmed to deliver minute volumes of 25 L/min and 40 L/min. We measured the baseline protection factor of the PAPR ...
Andersson Johan P A - - 2009
Long-term training of breath-hold diving reduces the hypercapnic ventilatory response (HCVR), an index of the CO(2) sensitivity. The aim of the present study was to elucidate whether also short-term apnea training (repeating apneas with short intervals) reduces the HCVR, thereby being one contributing factor explaining the progressively increasing breath-holding time ...
Zoethout Remco W M - - 2008
AIMS: Alcohol effects or drug-alcohol interactions are preferably studied at constant blood levels. To achieve pseudo-steady state levels, various methods are used, which usually produce adequate averages but variable individual concentration profiles. The aim was to compare two modes of alcohol administration: a 'two-step prekinetic procedure' and a 'clamping method'. ...
Cherry A D - - 2009
During diving, arterial Pco(2) (Pa(CO(2))) levels can increase and contribute to psychomotor impairment and unconsciousness. This study was designed to investigate the effects of the hypercapnic ventilatory response (HCVR), exercise, inspired Po(2), and externally applied transrespiratory pressure (P(tr)) on Pa(CO(2)) during immersed prone exercise in subjects breathing oxygen-nitrogen mixes at ...
Randsøe T - - 2008
At altitude, bubbles are known to form and grow in blood and tissues causing altitude decompression sickness. Previous reports indicate that treatment of decompression sickness by means of oxygen breathing at altitude may cause unwanted bubble growth. In this report we visually followed the in vivo changes of micro air ...
Akaishi Satoko - - 2008
Although patients with heart disease sometimes complain of shortness of breath with rapid and shallow ventilation, its precise characteristics are unclear. We evaluated the relationship between exercise tolerance and the degree of rapidness and shallowness of breathing during exercise. Thirty-eight heart disease patients with shortness of breath during daily activity ...
Gimenez Philippe - - 2008
We tested that the breath-by-breath V(O2) determination by an algorithm termed BR did not bias the kinetics parameters. It was compared to two other algorithms using a correction for changes in lung gas stores between two successive breaths (AU, W) and one without correction (NC). Ten healthy male subjects cycled ...
Jiang Yandong - - 2008
Upper airway unidirectional breathing, nose in and mouth out, is used by panting dogs to facilitate heat removal via water evaporation from the respiratory system. Why some humans instinctively employ the same breathing pattern during respiratory distress is still open to question. We hypothesized that 1) humans unconsciously perform unidirectional ...
Sim M A B - - 2008
Oxygen is the commonest drug prescribed in hospitals. The inhaled concentration is altered by the administered oxygen flow rate, the characteristics of the delivery device and the patient's respiratory pattern. Using healthy volunteers we measured the inspired oxygen concentration achieved with different devices both at rest and when the breathing ...
Hallani Mervat - - 2008
BACKGROUND AND OBJECTIVE: Nasal breathing provides a protective influence against exercise-induced asthma. We hypothesized that enforced oral breathing in resting mild asthmatic subjects may lead to a reduction in lung function. METHODS: Asymptomatic resting mild asthmatic volunteers (n = 8) were instructed to breathe either nasally only (N; tape over ...
Pathak Chander M - - 2008
BACKGROUND AND AIM: Previous studies have shown that while performing the (14)C-urea breath test ((14)C-UBT) for the detection of Helicobacter pylori (H. pylori), there is possibility of false-positive results due to the other urease producing bacteria present in oropharynx, if breath samples are obtained within 30 min after administration of ...
Scouten A A Medical Research Council, Cognition and Brain Sciences Unit, Cambridge, UK. - - 2008
As a simple, non-invasive method of blood oxygenation level-dependent (BOLD) signal calibration, the breath-hold task offers considerable potential for the quantification of neuronal activity from functional magnetic resonance imaging (fMRI) measurements. With an aim to improve the precision of this calibration method, the impact of respiratory rate control on the ...
Standley Thomas D A - - 2008
OBJECTIVES: To measure the extent of dilution of helium-oxygen (heliox) by room air when given via high concentration reservoir mask to spontaneously breathing subjects. Substantial dilution of heliox by room air under these circumstances might alter its physical properties sufficiently to negate any potential clinical benefit in obstructive respiratory failure. ...
Chan Cian - - 2008
BACKGROUND: Despite its importance, total body water (TBW) is usually estimated rather than measured due to the complexity of isotope dilution methods. The aim of this study was to demonstrate the applicability in haemodialysis (HD) patients of a recently developed on-line breath test, previously validated in healthy subjects, that uses ...
Danucalov Marcello Arias Dias - - 2008
The novelty of this study was to investigate the changes in cardiorespiratory and metabolic intensity brought about by the practice of pranayamas (breathing exercises of yoga) and meditation during the same hatha-yoga session. The technique applied was the one advocated by the hatha-yoga system. Nine yoga instructors-five females and four ...
Upadhyay Dhungel K - - 2008
Pranayama (breathing exercise), one of the yogic techniques can produce different physiological responses in healthy individuals. The responses of Alternate Nostril Breathing (ANB) the Nadisudhi Pranayama on some cardio-respiratory functions were investigated in healthy young adults. The subjects performed ANB exercise (15 minutes everyday in the morning) for four weeks. ...
Hartmann D - - 2008
INTRODUCTION: Daily change of breathing circuits in the operating theatre requires a lot of resources and is time and labour consuming. The extended use of breathing circuits could reduce the workload of the staff and health care costs. The aim of the present study was to evaluate the contamination rate ...
Dressel Holger - - 2008
BACKGROUND: The combined measurement of diffusing capacity of the lung for nitric oxide (Dlno) and diffusing capacity of the lung for carbon monoxide (Dlco) is a simple, noninvasive tool, but methodologic factors might influence results and reproducibility. We thus quantified the influence of breath-hold time on Dlco and Dlno in ...
Bayley D L - - 2008
The use of exhaled breath condensate (EBC) as a tool for noninvasive assessment of lung inflammation is becoming commonplace. Many authors use commercial ELISA kits to measure inflammatory mediators within EBC. However, the very low concentrations of mediators within EBC are often below the commercially validated concentration range of the ...
Rosias P P - - 2008
Optimal collection and analysis of exhaled breath condensate (EBC) are prerequisites for standardisation and reproducibility of assessments. The present study aimed to assess reproducibility of EBC volume, hydrogen peroxide (H(2)O(2)), 8-isoprostane and cytokine measurements using different condensers, including a newly developed glass condenser. At four points in time, 30 healthy ...
Yamauchi Motoo - - 2008
We examined whether acetazolamide (ACZ), a carbonic anhydrase inhibitor, would alter post-hypoxic ventilatory behavior and periodic breathing in the C57BL/6J (B6) mouse. Experiments were performed with unanaesthetized, awake adult male B6 mice (n = 5, 2.5 months old, 21.3 +/- 1.5 g, mean +/- SD) and ventilatory behavior was measured ...
Saatweber Margarete - - 2008
It has been shown that teachers are at high risk of developing occupational dysphonia, and it has been widely accepted that the vocal characteristics of a speaker play an important role in determining the reactions of listeners. The functions of breathing, breathing movement, breathing tonus, voice vibrations and articulation tonus ...
Gollee H - - 2008
Paralysis of the respiratory muscles in people with tetraplegia affects their ability to breathe and contributes to respiratory complications. Surface functional electrical stimulation (FES) of abdominal wall muscles can be used to increase tidal volume (V_{T}) and improve cough peak flow (CPF) in tetraplegic subjects who are able to breathe ...
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