The value for the slope of the left ventricular (LV) end-systolic pressure-dimension and pressure-volume relations has been proposed as a quantitative measure of the LV inotropic state. This measure of LV inotropic state is attractive because it is independent of preload and incorporates afterload. To investigate the sensitivity of the slope of these relations to alterations in contractile stat...

BACKGROUND AND AIMS Although volume controlled ventilation (VCV) has been the traditional mode of ventilation in robotic surgery, recently pressure controlled ventilation (PCV) has been used more frequently. However, evidence on whether PCV is superior to VCV is still lacking. We intended to compare the effects of VCV and PCV on respiratory mechanics and haemodynamic in patients undergoing robo...

Cardiac catheterization of a 79-year-old woman with systemic sclerosis demonstrated severe pulmonary arterial hypertension: a peak systolic pulmonary pressure of 99 mmHg and a mean pulmonary artery pressure of 51 mmHg without an increase in the mean pulmonary capillary wedge pressure. Pulsus alternans was detected in the right ventricle (RV) and pulmonary artery (PA), but not in the pulmonary a...

To investigate whether the supine posture caused sustained bronchoconstriction and could thus contribute to the development of nocturnal asthma, nine patients with nocturnal asthma were studied on two consecutive days, lying supine for four hours on one day and sitting upright for four hours on the other, the order of the two postures being randomised. Peak expiratory flow (PEF), forced expirat...

Increasing numbers of patients are receiving hyperbaric oxygen therapy as an intensive care treatment, some of whom have pre-existing airway obstruction. Spirometers are the ideal instruments for measuring airway obstruction, but peak flow meters are useful and versatile devices. The behaviour of both types of device was therefore studied in a hyperbaric unit under conditions of increased press...

Gas explosion and gas-coal dust are serious disasters in coal mine production. To further study the hazards of gas under different conditions, experiments were done this paper a pipeline system containing an pressure relief pipeline. Flame propagation behavior overpressure dynamics analyzed. divided into three stages: spherical flame, round-finger pointed-finger flame. front position increases ...

INTRODUCTION The implication of high peak plantar pressure on foot pathology in individuals both with and without diabetes has been recognized. The aim of this study was to investigate and clarify the relationship between increasing body mass and peak and mean plantar pressure in an asymptomatic adult population during walking. METHODS Thirty adults without any relevant medical history, struc...

BACKGROUND Breast implant displacement or rupture can cause aesthetic problems and serious medical complications. Activities with prone positioning and loading of the anterior chest wall, such as massage, chiropractic or osteopathic therapies may increase the risk of implant failure and can also cause discomfort in women with natural breast tissue. Here we test the effectiveness of a newly deve...