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Are arteries supplying the same territory are often merged with one another forming arterial anastomoses?
yes
What is triple vessel disease?
This term is used in cardiology to denote significant blockages in three coronary arteries, often requiring stenting procedures (in order to hold the arteries open) or requiring triple coronary artery bypass graft (CABG) surgery.
My Dr found during hysterectomy surgery and commented that I have enlarged uterine arteries what does this mean?
Gynecologists often tell women after exploratory surgery or hysterectomy that the blood supply to their uterus consisted of large veins and arteries. It is not a problem or concern, there is no reason to worry about it.
What is an occluded left vertebral artery?
Arteries are the blood vessels that carry oxygen and nutrients to organs. The vertebral arteries are two major arteries that carry oxygen to the brain and spinal cord. There are two vertebral arteries, one right and one left. They begin in the chest and travel up along the sides of the vertebrae, the bony segments of the spine.An occluded vertebral artery means that there is a blockage in one of these arteries. Blockages can be partial or complete, and are often given on a percent scale (eg, 75% occluded, 80% occluded, etc.). The size of the blockage can help determine the risk of complications. Complications of blockages are varied and depend on the type of blockage being dealt with. For instance, if the blockage is due to a condition called atherosclerosis (where fatty plaques build up in the arteries), then a major complication is plaque rupture, where a piece of the plaque breaks off and lodges in a small blood vessel of the brain. This condition is called atheroembolism and can cause a stroke.If you have recently been diagnosed with an occluded vertebral artery, you should ask your doctor what the implications are. Only she will know how to best gauge your risk factors for potential complications.
What is the nickname for the Department of Defense?
The Department of Defense is often referred to as The DOD.
Which vessels are called capacitance vessels?
Veins are considered capacitance vessels because they collect 60-70% of the blood in systemic circulation. Small arteries and arterioles are considered resistance vessels because they represent where pressure is more greatly reduced.
What is the value of the transition capacitance for a silicon diode when VD 0?
The transition capacitance of a silicon diode, often referred to as junction capacitance, depends on the applied voltage across the diode. When the diode is reverse-biased (VD < 0), the transition capacitance is positive and becomes larger as the reverse voltage increases. However, when VD = 0, the transition capacitance is at its minimum value, which can be approximated using the formula (C_j = \frac{\epsilon A}{W}), where (W) is the depletion width, (A) is the junction area, and (\epsilon) is the permittivity of the semiconductor material. At VD = 0, the depletion region is narrow, resulting in a relatively small capacitance.
What shape is vessels?
Vessels can come in various shapes depending on their type and function. For example, blood vessels are generally tubular, with arteries being thicker and more muscular, while veins are usually thinner and have valves. In the context of shipping, vessels such as boats and ships are often designed with a hull shape that allows for efficient movement through water. Overall, the shape of vessels is tailored to their specific roles and environments.
What does a preset capacitor do in a circuit?
A preset capacitor, often referred to as a trimmer capacitor, is used in circuits to fine-tune capacitance values for specific applications. It allows for adjustments in capacitance, which can help in optimizing the performance of oscillators, filters, and tuning circuits. By providing a variable capacitance, it enables engineers to calibrate the circuit for desired frequency response or impedance matching. Once set, it can be left in place to maintain the desired circuit characteristics.
What is stray capacitance and how is different from ordinary capacitor?
Any two adjacent conductors can be considered a capacitor, although the capacitance will be small unless the conductors are close together for long. This (often unwanted) effect is termed "stray capacitance". Stray capacitance can allow signals to leak between otherwise isolated circuits (an effect called crosstalk), and it can be a limiting factor for proper functioning of circuits at high frequency. Stray capacitance is often encountered in amplifier circuits in the form of "feedthrough" capacitance that interconnects the input and output nodes (both defined relative to a common ground). It is often convenient for analytical purposes to replace this capacitance with a combination of one input-to-ground capacitance and one output-to-ground capacitance. (The original configuration - including the input-to-output capacitance - is often referred to as a pi-configuration.) Miller's theorem can be used to effect this replacement. Miller's theorem states that, if the gain ratio of two nodes is 1/K, then an impedance of Z connecting the two nodes can be replaced with a Z/(1-k) impedance between the first node and ground and a KZ/(K-1) impedance between the second node and ground. (Since impedance varies inversely with capacitance, the internode capacitance, C, will be seen to have been replaced by a capacitance of KC from input to ground and a capacitance of (K-1)C/K from output to ground.) When the input-to-output gain is very large, the equivalent input-to-ground impedance is very small while the output-to-ground impedance is essentially equal to the original (input-to-output) impedance.
Do arteries and nerves tend to travel together?
Yes, arteries and nerves often travel together, particularly in peripheral regions of the body. This is because nerves typically innervate the muscles and tissues supplied by the arteries, necessitating their proximity for efficient function. Additionally, the protective sheaths surrounding nerves can help shield adjacent blood vessels, creating a coordinated pathway for both structures.
What are the uses of Omniscan?
Omniscan is an agent which is used to assist with MR imaging and enables doctors to see the blood vessels. In medical circles it often referred to as Gadodiamide.
What does an angiologist specializes on?
An angiologist specializes in the diagnosis and treatment of disorders related to the blood vessels, specifically arteries, veins, and lymphatic vessels. They often focus on conditions such as peripheral artery disease, deep vein thrombosis, and varicose veins.
What are vessels that move through the water with minimum of propulsion called?
Vessels that move through water with minimal propulsion are often referred to as "passive vessels" or "sailing vessels." These types of vessels rely primarily on natural forces, such as wind or currents, to navigate. Examples include sailboats and certain types of rafts or canoes that use paddles or oars sparingly. Their design typically optimizes for efficient movement with little to no mechanical propulsion.
What is picofarad?
Picofarad is a unit of capacitance in the metric system representing one trillionth (10^-12) of a farad. It is commonly used to measure the small capacitance of electronic components, such as capacitors in integrated circuits.
Why does the concept of stray capacitance came into electronic circuits?
Any two objects that occupy the same universe have capacitance between them. In electronic circuits components are quite close to each other, and this capacitance is often a nuisance, causing cross-talk, instability, and signal losses.
What is the position of venous blood vessels in relation to arteriesnerves and other structures?
Venous blood vessels are typically located deeper within the body compared to arteries, which are often more superficial. In many areas, veins accompany arteries, running parallel to them, but they can also be found in more variable positions relative to nerves and other structures. Veins tend to have a more variable location and can be influenced by surrounding tissues, often lying closer to muscles or bones. Overall, their positioning is designed to facilitate efficient blood return to the heart while minimizing the risk of compression or injury.
