The hepatorenal space (pouch of Rutherford-Morison)
is the most dependent part of the upper peritoneal cavity
and small amounts of intra-peritoneal fluid may collect
in this region first. Blood shows as a hypoechoic black
stripe between the capsule liver and the fatty fascia
of the kidney.
The probe is placed in the right mid- to posterior
axillary line at the level of the 11th and 12th ribs.
