What is Cholesterol?Cholesterol is a sterol (a combination steroid and alcohol). Cholesterol is a lipid found in the cell membranes of all tissues, and it is transported in the blood plasma of all animals. Because cholesterol is synthesized by all eukaryotes, trace amounts of cholesterol are also found in membranes of plants and fungi.The name originates from the Greek chole- (bile) and stereos (solid), and the chemical suffix -ol for an alcohol, as researchers first identified cholesterol in solid form in gallstones by Francois Poulletier de la Salle in 1769. However, it is only in 1815 that chemist Eugene Chevreul named the compound "cholesterine".[2]Most of the cholesterol is synthesized by the body and some has dietary origin. Cholesterol is more abundant in tissues which either synthesize more or have more abundant densely-packed membranes, for example, the liver, spinal cord and brain. It plays a central role in many biochemical processes, such as the composition of cell membranes and the synthesis of steroid hormones. Cholesterol is insoluble in blood, but is transported in the circulatory system bound to one of the varieties of lipoprotein, spherical particles which have an exterior composed mainly of water-soluble proteins. The main types, low-density lipoprotein (LDL) and high-density lipoprotein (HDL) carry cholesterol from and to the liver.According to the lipid hypothesis, abnormally high cholesterol levels (hypercholesterolemia) and abnormal proportions of LDL and HDL are associated with cardiovascular disease by promoting atheroma development in arteries (atherosclerosis). This disease process leads to myocardial infarction (heart attack), stroke and peripheral vascular disease. As high LDL contributes to this process, it is termed "bad cholesterol", while high levels of HDL ("good cholesterol") offer a degree of protection. The balance can be redressed with exercise, a healthy diet, and sometimes medication. |
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Blood Pressure Measurement - Definition, Purpose, Precautions The non-invasive blood pressure is taken using a sphygmomanometer, a hand bulb pump, and a cuff. The sphygmomanometer may be electronic or mercury-based. blood pressure monitor - Offers for blood pressure monitor DT-A102 Calibrated type Specification Calibrated nylon cuff Stop pin manometer 120G or 145G Related Keywords: mercury sphygmomanometer, blood pressure MedlinePlus Medical Encyclopedia: Blood pressure Blood pressure readings are measured in millimeters of mercury (mmHg) and All you need to perform a blood pressure measurement is a cuff and a device Older Blood Pressure Monitors May Still Be Best 3/3/01 The American Heart Association's Council for High Blood Pressure Research, caution that the new electronic and non-mercury blood pressure devices are seldom Home Monitoring of High Blood Pressure It's not often recommended for home use due to the hazards of mercury. Disadvantages include: Do blood pressure cuffs come in different sizes? Blood pressure - Wikipedia, the free encyclopedia The mercury manometer, considered to be the gold standard for arterial pressure When blood flow is nil (cuff pressure exceeding systolic pressure) or Sphygmomanometer, Mercury Sphygmomanometer, Aneroid Sphygmomanometer, Mercury Sphygmomanometer, Aneroid Sphygmomanometers, Parts, Mercurial Blood Pressure Monitors, Blood Pressure Cuff & Parts, Manufacturer, Blood Pressure Monitoring Equipment by W.A. Baum maker of the The importance of accurate blood pressure determinations cannot be When pressure is exerted by inflating the cuff the mercury rises in the glass tube. Modern devices to measure blood pressure Ambulatory Blood Pressure Monitor Mercury Sphygmomanometer This includes a mercury manometer, an upper arm cuff, a hand inflation bulb with a pressure Checking Up on Blood Pressure Monitors Despite environmental concerns about mercury-filled sphygmomanometers, Taking blood pressure measurement with a cuff that's too narrow could |
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