The study of the acoustic effect of perforated plates by Large-Eddy Simulations is reported. The ability of compressible Large-Eddy Simulations to provide data on the flow around a perforated plate and the associated acoustic damping is demonstrated. In particular, assumptions of existing models of the acoustic effect of perforated plate are assessed thanks to the Large-Eddy Simulations results...

The ingestion of non-steroidal anti-inflammatory drugs (NSAID) in 272 patients with bleeding or perforated peptic ulcer was compared with 272 age/sex matched controls. A significantly higher proportion of patients with gastric ulcers had received NSAID than those with duodenal ulcers. Twelve of 90 (13%) patients admitted with bleeding duodenal ulcers had received NSAID compared with 11 of 26 (4...

Main results 2 trials met the selection criteria: 1 trial compared the Prentif Cavity Rim Cervical Cap (Lamberts Ltd, Oxford, UK) with the Ortho diaphragm (Ortho Pharmaceutical Corporation, Raritan, NJ, USA) (n=1529, 6–24 mo follow up), and 1 trial compared the FemCap cervical cap (rubber manufactured by Hi-Tech Rubber, Anaheim, CA, USA) with the All-Flex diaphragm (Ortho) (n=841, 28 wk follow ...

Perforated appendix is a serious .surgical condition that carries a high morbidity. Antibiotic treatment is often started before the availability of bacteriological reports. The choice of antibiotics would depend on the bacteriology associated with perforated appendix. In a retrospective survey of the bacteriology of peritoneal pus obtained from cases of perforated appendix at the General Hospi...

During the past 10 years, intensive experimental research has focused on the effects of mechanical ventilation on the diaphragm. Whatever the animal species studied, all these studies have consistently shown that mechanical ventilation impaired diaphragm function, resulting in the so-called ventilatorinduced diaphragm dysfunction (VIDD) [1–9]. The development of this effect is rapid and worsens...

We investigated the dependence of electromechanical coupling and the piezoelectric response of a micromachined Pb(Zr₀.₅₂Ti₀.₄₈)O₃ (PZT) diaphragm on its curvature by observing the impedance spectrum and central deflection responses to a small AC voltage. The curvature of the diaphragm was controlled by applying air pressure to its back. We found that a depolarized flat diaphragm does not initia...

OBJECTIVE To examine whether density of providers or health care facility factors have a significant effect on the rates of perforated appendicitis in the pediatric population. DESIGN A retrospective database analysis. Data were linked to the Area Resource File to determine if there was an association between perforated appendicitis and density of provider and facility factors. SETTING The ...

The diaphragm is a sheet of muscle that separates the lungs from the abdomen. When a person takes a deep breath, the dome-shaped diaphragm contracts and flattens. In doing this, the diaphragm pulls air into the lungs. The left diaphragm contains a small hole through which passes the tube-shaped esophagus that carries food and liquid to the stomach. Normally this hole, called a hiatus, is small ...

Inspiratory muscle weakness in patients with COPD is of major clinical relevance. For instance, maximum inspiratory pressure generation is an independent determinant of survival in severe COPD. Traditionally, inspiratory muscle weakness has been ascribed to hyperinflation-induced diaphragm shortening. However, more recently, invasive evaluation of diaphragm contractile function, structure, and ...