HYPOTHESIS Intravenous magnesium sulfate improves objective measures of expiratory flow in patients with acute severe exacerbations of asthma. DESIGN Randomized, double-blind, placebo-controlled trial. SETTING Urban emergency department. PARTICIPANTS Forty-eight asthmatic patients aged 18 to 60 years with initial peak expiratory flow rate (PEFR) < 200 L/min who failed to double their init...

This paper describes a computational investigation on the response of thin wall structures due to dynamic compression loading. In this paper, the tubes subjected for both direct and oblique loading. Several different cross-sectional structures have been studied to specify the best one. Initially the tubes were subjected to direct loading, and then the tubes were subjected to oblique loading. Af...

BACKGROUND AND PURPOSE Parenterally administered MgSO4 is neuroprotective in standard animal models of focal cerebral ischemia and in many other paradigms of brain injury. Previous small clinical trials in stroke patients have explored the safety and tolerability of different infusion regimens. This study was undertaken to optimize the regimen for a multicenter trial. METHODS Within 24 hours ...

UNLABELLED The dynamic loading in human body, along with the corrosive body fluid, presents a great challenge for the practical use of biodegradable magnesium implants. In this study, a high purity magnesium (99.99wt.%) and two typical promising biodegradable magnesium alloys (binary Mg-1Ca and ternary Mg-2Zn-0.2Ca) were chosen as the experimental materials. Their dynamic mechanical performance...

Magnesium (Mg) deficiency has not usually been considered in clinical practice due to lack of relevant blood tests and because the symptoms are often vague and nonspecific. Serum concentrations may not adequately reflect Mg status. Mg Loading Test (MLT) can provide information on total body Mg stores. We prospectively studied 21 critically ill patients (10 male,11 female) admitted to the ICU, t...

with the expanding demand on application of magnesium alloys in automotive and aerospace industries, robust methods in fatigue characterization of commercially available magnesium alloys with high specific strength is anticipated. in this paper, rotating bending load controlled tests has been studied on specimens machined from an extrusion piece of az31b. due to asymmetric and anisotropic behav...

A selective test strip based on an ion-exchange mechanism to determine magnesium is described. This optical and reversible test strip, made on a transparent polyester sheet, has a circular polymeric film of plasticised PVC that contains all of the reagents necessary to produce a response to magnesium, namely, a cation-selective neutral ionophore, 2-amino-N,N'-diheptyl-N,N'-dimethyl-butanediamid...

OBJECTIVE To test the safety, efficacy, and acceptability of a simple, mechanically flow-controlled pump (Springfusor®) for the delivery of magnesium sulfate for the treatment of preeclampsia. DESIGN Eligible women (n=300) had blood pressure ⩾140/100mmHg, and proteinuria ⩾1+ (30mgdL); the clinic team determined that they were likely to benefit from magnesium sulfate. Women were randomized to ...

Several types of cyclic stress were applied to specimens made an extruded magnesium alloy, AZ31, elucidate twinning, detwinning, and fatigue crack initiation mechanisms by electron backscattered diffraction analysis. In both the texture random orientation, twinning occurred under compressive exceeding yield strength. Detwinning only in upon subsequent application tensile less than strength mono...