This paper derives the difference in pressure between the beginning and the end of a rectangular microchannel through which a flowing liquid (water, with or without surfactant, and mixtures of water and glycerol) carries bubbles that contact all four walls of the channel. It uses an indirect method to derive the pressure in the channel. The pressure drop depends predominantly on the number of b...

This article examines the causes of pressure ulcers and provides an overview of the best advice available in preventing them in the clinical setting. This should enable nurses to provide more effective interventions for preventing patients from developing pressure ulcers.

PURPOSE The purpose of this study was to compare the pressure required to abolish apneas as predicted from a previously derived algorithm (Ppred) with the true effective pressure (Peff) determined during a continuous positive airway pressure (CPAP) titration study. SETTING Sleep clinic of a university hospital. METHODS We prospectively studied 329 patients with sleep apnea undergoing CPAP t...

introduction atmospheric processes and their interactions with ground surface responsible for formation and evolution of a heavy dust storm are important for identifying dust transport pathways. spatial and temporal distribution of middle eastern dust for a severe dust event during 4-8 july 2009 was analyzed by weather research and forecasting with chemistry (wrf/chem) model simulations, in-sit...

purpose: to compare the short and long-term efficacy and complications of releasable suture vs conventional interrupted suture for scleral flap in trabeculectomy. methods: in a prospective randomized clinical trial, 42 eyes of 42 consecutive patients requiring trabeculectomy for uncontrolled primary glaucoma underwent conventional trabeculectomy (group a) and trabeculectomy with releasable sutu...

Measurement of plasma volume before and after the acute infusion of commercial dextran revealed that all brands tested were hyperoncotic by a factor of approximately 2. By mixing 6% dextran with 0.9% saline in 1:1 proportion a 3% dextran solution was obtained which was nearly isoncotic in our dogs. The most likely explanation for the discrepancy is that the 6% solution contains a high proportio...