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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Arterial Pressure Monitoring An arterial line is essential when accuracy in blood pressure measurement is needed or frequency of blood pressure is needed. Some of these are as follows: MedlinePlus Medical Encyclopedia: Peripheral arterial line - infants A peripheral arterial line (PAL) is a small, short plastic catheter The main reason to use a PAL is to continuously watch your babyâ™s blood pressure. (WO/2003/007816) ARTERIAL LINE EMULATOR An arterial line emulator (16) interfaces a non-invasive blood pressure monitor (14) with an invasive blood pressure monitor (18). Arterial line emulator - US Patent 6471646 An arterial line emulator interfaces a non-invasive blood pressure monitor with an invasive blood pressure monitor. The emulator receives pressure waveform Arterial line - Wikipedia, the free encyclopedia An arterial line is a thin catheter inserted into an artery. It is most commonly used in intensive care medicine to monitor the blood pressure real-time Placement of an Arterial Line An arterial line. allows for consistent and continuous monitoring of blood pressure to facilitate the. reliable titration of supportive medications. Arterial Line Placement | UncleHarvey.com Wiki As opposed to non-invasive blood pressure monitoring via a blood pressure cuff, an intra-arterial line (otherwise known as arterial lines, art lines, ICU-USA - Tour - Arterial Line Critically ill or injured patients frequently have profound abnormalities in their blood pressure. The arterial line provides a way to constantly measure a "A-Line" or "Intra-Arterial Catheters" An intra-arterial catheter (A-line) is a very small plastic tube (called catheter) Reasons for Placing A-Line. To watch your blood pressure very closely Arterial Blood Pressure Monitoring: An Introduction This article presents an introduction to one such type of invasive monitoring: the intra-arterial line, which measures blood pressure. |
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