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For patients with coronary artery disease, a vascular bypass may be recommended to reroute blood around blocked arteries to restore and improve blood flow and oxygen to the heart. To create the bypass graft , a surgeon will remove or "harvest" healthy blood vessels from another part of the body, either arteries from an arm or the chest, or ...
The tendency of the arteries and veins to stretch in response to pressure has a large effect on perfusion and blood pressure. This physically means that blood vessels with a higher compliance deform easier than lower compliance blood vessels under the same pressure and volume conditions. [ 1 ]
Asset recovery, also known as investment or resource recovery, is the process of maximizing the value of unused or end-of-life assets through effective reuse or divestment. While sometimes referred to in the context of a company undergoing liquidation , Asset recovery also can describe the process of liquidating excess inventory , refurbished ...
A process flow diagram (PFD) is a diagram commonly used in chemical and process engineering to indicate the general flow of plant processes and equipment. The PFD displays the relationship between major equipment of a plant facility and does not show minor details such as piping details and designations.
A pressure exchanger transfers pressure energy from a high pressure fluid stream to a low pressure fluid stream. Many industrial processes operate at elevated pressures and have high pressure waste streams. One way of providing a high pressure fluid to such a process is to transfer the waste pressure to a low pressure stream using a pressure ...
The blood pressure in blood vessels is traditionally expressed in millimetres of mercury (1 mmHg = 133 Pa). In the arterial system, this is usually around 120 mmHg systolic (high pressure wave due to contraction of the heart) and 80 mmHg diastolic (low pressure wave). In contrast, pressures in the venous system are constant and rarely exceed 10 ...
An example of this phenomenon is measurement of blood pressure using the "pulse obliteration method" with a sphygmomanometer. At resting state the arterial critical closing pressure is ~ 20 mmHg . Critical closing pressure in arteries is higher than the mean vascular filling pressure that develops after death (~7 mmHg).
Rapid pressure swing adsorption, or RPSA, is frequently used in portable oxygen concentrators. It allows a large reduction in the size of the adsorbent bed when high purity is not essential and when the feed gas (air) can be discarded. [7] It works by quickly cycling the pressure while alternately venting opposite ends of the column at the same ...