Ischemic ATN occurs when the tubular cells do not get enough oxygen, a condition that they are highly sensitive and susceptible to, due to their very high metabolism. Diagnosis. Acute tubular necrosis is classified as a renal (i.e. not pre-renal or post-renal) cause of acute kidney injury. Diagnosis is made by a FENa (fractional excretion of sodium) > 3% and presence of muddy casts (a type of granular cast) in urinalysis.
A Rhyming Couplet is two line of the same length that rhyme and complete one thought. There is no limit to the length of the lines. Rhyming words are words that sound the same when spoken, they don't necessarily have to be spelt the same.
Stanza forms. Stanzas can take many forms, most of which are unnamed. A few standard stanzas have stood the test of time. A couplet is a two-line stanza; if the two lines rhyme it is called a rhyming couplet. A tercet or triplet is a three-line stanza. A quatrain is a four-line stanza. Sometimes a stanza is called a verse or a stroph. The meaning is essentially the same, but stanza is the far more popular term. The important thing to remember is that, except when you are using a set form, you have a great deal of leeway in how you use stanzas.