ejection

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ejection

[ē′jek·shən]
(engineering)
The process of removing a molding from a mold impression by mechanical means, by hand, or by compressed air.
(ordnance)
The expelling, by the ejector, of the empty cartridge case from small arms and rapid-fire guns.

ejection

i. Escaping from an aircraft in an emergency by means of an independently propelled seat or capsule.
ii. In air armament, the process of forcefully separating an aircraft store from an aircraft to achieve satisfactory separation. This is normally done by an electromagnet release unit (EMRU), a pneumatic release unit, or a pyrocartridge(s).
References in periodicals archive ?
Stroke volume, at times, may increase normally during upright exercise, despite a decrease in left ventricular ejection fraction.
Clinical research by cardiologist Peter Langsjoen in 2008 found that ejection fraction could be boosted from 24% to 45% (the higher the percentage, the better) using 450 mg/day of the ubiquinol form of CoQ10 on congestive heart failure patients.
hospitals with a diagnosis of HF with decreased left ventricular ejection fraction in 20052009 and were eligible for treatment with aldosterone antagonists.
5) found that the calculation of the gallbladder ejection fraction (GBEF) was useful in selecting patients for surgery in 19 of 23 papers studied, including that of Yap et al.
If such trials prove that T-wave alternans and other new measures can supplement ejection fraction in clinical evaluation of patients, doctors may save more lives even though they implant fewer devices than they do now.
The National Institutes of Health-sponsored SCD-HeFT trial showed that preventive implantation of ICDs reduced death by 23 percent in people with heart failure and low ejection fraction, compared to those who did not receive defibrillators.
The patient's condition subsequently improved, and a repeat systolic ejection fraction 1 month later on a myocardial perfusion single photon emission computed tomography study was 51%.
Before the surgery, the average ejection fraction in the patients randomized to bypass surgery alone was 30.
Ejection fraction is a standard measure of heart performance determined by the total amount of blood the left ventricle pumps out with each beat.
The ejection fraction in people with a healthy heart normally exceeds 50 percent.
The patients left ventricular ejection fraction was determined before HDC and at several time points, up to 12 months, after HDC.