| controlled respiration | Intermittent application of mechanically or manually generated positive pressure to gas(es) in or about the airway as a means of forcing gases into the lungs in the absence of spontaneous ventilatory efforts. Synonym: controlled respiration. (05 Mar 2000) |
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| controlled substance | A substance subject to the Controlled Substances Act (1970), which regulates the prescribing and dispensing, as well as the manufacturing, storage, sale, or distribution of substance's assigned to five schedules according to their 1) potential for or evidence of abuse, 2) potential for psychic or physiologic dependence, 3) contributing a public health risk, 4) harmful pharmacologic effect, or 5) role as a precursor of other controlled substance's. (05 Mar 2000) |
| controlled thermonuclear fusion | <radiobiology> The process in which light nuclei, heated to a high temperature in a confined region, undergo fusion reactions under controlled conditions, with associated release of energy which may be harnessed for useful purposes. (09 Oct 1997) |
| controlled thermonuclear research | General label for research on controlled thermonuclear fusion reactions. (09 Oct 1997) |
| controlled trial | A clinical study in which one group of participants receives an experimental drug while another group receives either a placebo or an approved standard therapy. When participants do not know which group they are in, the trial is blinded. See: Double-Blind. (09 Oct 1997) |
| controlled ventilation | Intermittent application of mechanically or manually generated positive pressure to gas(es) in or about the airway as a means of forcing gases into the lungs in the absence of spontaneous ventilatory efforts. Synonym: controlled respiration. (05 Mar 2000) |
| pressure-controlled respirator | A respirator that provides a predetermined pressure to gases during inhalation, the volume of gas moved being variable, depending upon resistance. (05 Mar 2000) |
| noncondensing, controlled extraction turbine | A turbine that bleeds part of the main steam flow at one (single extraction) or two (double extraction) points. (05 Dec 1998) |
| environment, controlled | A state in which the environs of hospitals, laboratories, domestic and animal housing, work places, spacecraft, and other surroundings are under technological control with regard to air conditioning, heating, lighting, humidity, ventilation, and other ambient features. The concept includes control of atmospheric composition. (12 Dec 1998) |
| anovular ovarian follicle | A follicle that does not contain an ovum. (05 Mar 2000) |
| atretic ovarian follicle | A follicle that degenerates before coming to maturity; great numbers of such atretic follicle's occur in the ovary before puberty; in the sexually mature woman, several are formed each month. Synonym: corpus atreticum. (05 Mar 2000) |
| cancer, ovarian | Cancer of the egg sac of females (ovary). In women under age 30, most ovarian growths are benign, fluid-filled sacs called cysts. There are several types of ovarian cancer. Symptoms of ovarian cancer can be vague. Detection of ovarian cancer involves physical examination (including pelvic exam), ultrasound, X-ray tests, CA-125 blood test and biopsy of the ovary. (12 Dec 1998) |
| vesicular ovarian follicle | A follicle in which the oocyte attains its full size and is surrounded by an extracellular glycoprotein layer (zona pellucida) that separates it from a peripheral layer of follicular cells permeated by one or more fluid-filled antra; the theca of the follicle develops into internal and external layers. Synonym: folliculus ovaricus vesiculosus, graafian follicle, secondary follicle. (05 Mar 2000) |
| mature ovarian follicle | A follicle ready for ovulation; in the human ovary its antrum attains a diameter of 6 to 8 mm and presents a surface bulge; a first maturation (meiotic) division of the ovum usually occurs just prior to the rupture of the follicle. (05 Mar 2000) |
| granular layer of a vesicular ovarian follicle | The layer of small cells that forms the wall of an ovarian follicle. Synonym: granular layer of a vesicular ovarian follicle, granulosa, membrana granulosa, stratum granulosum ovarii. (05 Mar 2000) |