Influence of an Axial-Electromagnetic Field Treatment Device with a Solenoid Structure on Crystallization Fouling on the Tube Side of a Shell-and-Tube Heat Exchanger.

In this study, the influence of an axial-electromagnetic field treatment device (AEFTD) with a solenoid structure using different electromagnetic frequencies on calcium carbonate (CaCO) crystallization fouling on the tube side of a shell-and-tube heat exchanger was investigated. The experimental results indicated that the application of the AEFTD could effectively reduce fouling resistance and decelerate the growth rate of CaCO fouling. The opposite trend between fouling resistance and the outlet temperature of an experimental fluid indicated that the application of the AEFTD could enhance heat transfer.

Volume-Targeted Versus Pressure-Limited Noninvasive Ventilation in Subjects With Acute Hypercapnic Respiratory Failure: A Multicenter Randomized Controlled Trial.

Background: Volume-targeted noninvasive ventilation (VT-NIV), a hybrid mode that delivers a preset target tidal volume (V) through the automated adjustment of pressure support, could guarantee a relatively constant target V over pressure-limited noninvasive ventilation (PL-NIV) with fixed-level pressure support. Whether VT-NIV is more effective in improving ventilatory status in subjects with acute hypercapnic respiratory failure (AHRF) remains unclear. Our aim was to verify whether, in comparison with PL-NIV, VT-NIV would be more effective in correcting hypercapnia, hence reducing the need for intubation and improving survival in subjects with AHRF.

[Clinical analysis of thoracoscopy of 30 coalworker's pneumoconiosiswith pleural effusion cases].

Objective: To investigate the diagnostic value of thoracoscopy on idiopathic coalworker's pneumoconiosis with pleural effusion in general medicine.

Method: Routine (general medicine) thoracoscopyof patients suffering from iIdiopathiccoalworker's pneumoconiosis with pleural effusion, pathological examination of lesions obtained (direct vision).

Result: Pathological examination revealed grayish-white miliary nodules with multiple protruding nodules, irregular focal pleura thickening, pulmonary congestion, edema, fibrous adhesion.

[Analysis of pathogen isolated from lower respiratory tract in coalminer's pneumoconiosis patients complicated with infection].

Objective: To investigate the composition and resistance of main pathogens isolated form Lower respiratory tract in coalminer's pneumoconiosis patients complicated with infection to provide the basis for clinical treatment.

Method: Coalminer's pneumoconiosis patients complicated with infection during 2009 to 2010 were divided into mechanical ventilation group and non mechanical ventilation group. Specimens were obtained from lower respiratory tract by fibrobronchoscopy with protected specimen brush in patients of both groups to perform isolation, culture, identification and susceptibility test of pathogen.