Deathwatch beetle. The deathwatch beetle, Xestobium rufovillosum, is a woodboring beetle. The adult beetle is 7 millimetres (0.28 in) long, while the xylophagous larvae are up to 11 mm (0.43 in) long.
In medicine, a stent is a tube or other device placed in the body to create a passage between two hollow spaces, and stenting is the placement of a stent.
A guide wire may be inserted with the aid of a fluoroscope, an imaging device that uses x-rays to see structures on a fluorescent screen. A stent is 10 to 15 inches long and less than a quarter inch thick. During a nephrostomy, a fluoroscope, or an ultrasound, and a needle are used to place a catheter in the kidney. A catheter is a long, thin plastic tube that is considerably smaller than a pencil lead, or approximately 1/8 inch in diameter.