Page 126 - Clinical Manual of Small Animal Endosurgery

114 Clinical Manual of Small Animal Endosurgery

Instrument seen on monitor

Monitor

Instrument portal Instrument
Site of interest

Second instrument
portal

Endoscope Endoscope
portal
Fig. 4.6 Line drawing illustrating the principle of triangulation: the two instrument portals are
placed on either side of the scope portal so that all three converge on the area of interest. The
monitor is placed across the patient from the surgeon.

Fig. 4.7 Two trumpet valve trocars placed, one for the scope (left) and
one for an instrument (right).