Excretion of bile pigments in urine indicates

Blood is drained from a convenient $P$ of a patient and is pumped into a dialyzing unit after adding $Q$. After purification,$R$ is added to the blood,and it is returned to the body through $S$.
$\quad \quad P\quad \quad Q\quad \quad R\quad \quad S$

In this disorder,an insoluble mass of stones or crystalline salts is formed within the kidney.

The disease caused by the deficiency of $ADH$ is:

$A -$ Malfunctioning of kidneys can lead to accumulation of urea in blood,a condition called uremia.
$R -$ Blood drained from a convenient artery is pumped into a dialyzing unit after adding an anticoagulant like heparin.

Struvite stones are derived from . . . . . . .