Loss: Using hybrid splitters / hybrid dividers / hybrid combiners, much less power is lost than if a resistive function had been used. When used as a splitter or divider the main level reduction is caused by the action of dividing the power between several ports.
Most scientific study has focused on ANP and BNP. Measurement of BNP helps doctors diagnose and treat congestive heart failure. In this condition, the heart is unable to pump blood efficiently, and the heart chambers swell with blood. As the heart cells stretch, they produce extra BNP, which pours into the bloodstream. By measuring blood levels of BNP, doctors can spot signs of congestive heart failure in its early stages, when it may be hard to distinguish from other disorders. A normal BNP level is about 98% accurate in ruling out heart failure.
A: Your cardiologist ordered the BNP blood test to determine whether your symptoms of dyspnea (difficulty breathing) could be caused by heart failure. BNP is shorthand for brain (or B-type) natriuretic peptide. The name is somewhat misleading, as BNP has nothing to do with the human brain. BNP is a naturally occurring signaling hormone in the blood, and is produced by human heart muscle. Because the molecule was first discovered in the brain tissue of pigs, however, the âbrainâ term has persisted.