BACKGROUND Minor differences in technique may account for the wide range of published normal values of maximum expiratory and inspiratory pressures. The effects of holding the lips while the subject performed a maximal expiratory pressure manoeuvre were investigated in this study. METHODS Maximum static expiratory pressures (PEmax) obtained with a cylindrical tube by means of lip compression ...

BACKGROUND AND OBJECTIVES To evaluate the relationship between age and anesthesia method used for tympanostomy tube insertion (TTI) and to provide evidence to guide the selection of an appropriate anesthesia method in children. SUBJECTS AND METHODS We performed a retrospective review of children under 15 years of age who underwent tympanostomy tube insertion (n=159) or myringotomy alone (n=17...

a 62-yr-old woman with a history of papillary carcinoma of thyroid who had undergone thyroidectomy and tracheostomy 5 years prior to admission, presented with bleeding from the site of tracheostomy. attempts to control the bleeding failed, and the patient was immediately transported to the operating room. awake intubation was performed and the endotracheal tube was sutured to the skin. a tear i...

background: in patients undergoing mechanical ventilation, mucus production and secretion is high as a result of the endotracheal tube. because endotracheal suction in these patients is essential, chest physiotherapy techniques such as expiratory rib cage compression before endotracheal suctioning can be used as a means to facilitate mobilizing and removing airway secretion and improving alveol...

A crucial step in image compression is the evaluation of its performance, and more precisely the available way to measure the final quality of the compressed image. Usually, to measure performance, some measure of the covariation between the subjective ratings and the degree of compression is performed between rated image quality and algorithm. Nevertheless, local variations are not well taken ...

BACKGROUND Blunt trauma causes short-term compression of some or all parts of the chest, abdomen or pelvis and changes hemodynamics of the blood. Short-term compression caused by trauma also results in a short-term decrease in the diameter of blood vessels. It has been shown that with a sudden change in the diameter of a tube or in the direction of the flow, the slower-moving fluid near the wal...

The energy absorption of concrete filled, hollow-steel bracing was analyzed respect to geometric and mechanical parameters including the width-to-thickness section ratio, slenderness level, and strength of the steel and concrete. Local buckling and ductility were also investigated with respect to variation in the cross-section. The infill increased the compression resistance, even after multipl...

Abstract Experimental and numerical studies on the static behaviour of eccentrically compressed recycled aggregate concrete filled steel tube (RACFST) slender columns with rectangular cross-section are reported in this paper. Fifteen specimens were tested under eccentric compression. The factors considered experimental investigation included: 1) depth-to-width ratio (?), from 1.0 to 2.0; 2) loa...