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A second bypass may be required if a blockage forms in the bypass graft later on. Over time, there is a decreasing trend of percentage patency (likelihood a vessel will remain open) in popliteal bypass surgery, 88% in the first year, 79% and 76% at 3 and 5 years respectively. [13]
A crossed-field amplifier (CFA) is a specialized vacuum tube, first introduced in the mid-1950s and frequently used as a microwave amplifier in very-high-power transmitters. Raytheon engineer William C. Brown 's work to adapt magnetron principles to create a new broadband amplifier is generally recognized as the first CFA, which he called an ...
The common femoral artery (CFA) is located between the inferior margin of the inguinal ligament, and the branching point of the deep femoral artery. Its first three or four centimetres are enclosed, with the femoral vein, in the femoral sheath.
The current-feedback operational amplifier (CFOA or CFA) is a type of electronic amplifier whose inverting input is sensitive to current, rather than to voltage as in a conventional voltage-feedback operational amplifier (VFA). The CFA was invented by David Nelson at Comlinear Corporation, and first sold in 1982 as a hybrid amplifier, the CLC103.
In the legs, bypass grafting is used to treat peripheral vascular disease, acute limb ischemia, aneurysms and trauma.While there are many anatomical arrangements for vascular bypass grafts in the lower extremities depending on the location of the disease, the principle is the same: to restore blood flow to an area without normal flow.
Crossed field test antenna installed in Silsden, U.K. A crossed field antenna (CFA) is a controversial type of radio antenna for long and mediumwave broadcasting, patented by F. M. Kabbary and M. C. Hately in 1986, which was claimed to have the same efficiency as a conventional antenna but only one-tenth the overall height.
The progressive Georgia district attorney who was prosecuting nursing student Laken Riley’s illegal immigrant killer refused to seek the death penalty even after removing herself from the case.
Coronary artery bypass surgery during mobilization (freeing) of the right coronary artery from its surrounding adipose tissue (yellow). The tube visible at the bottom is the aortic cannula , which returns blood from the heart–lung machine .