(1) The liquid contrast is now introduced into the colon (under fluoroscopic
control) via the disposable enema kit--bag, tubing, and tip--using a gravity to allow the
flow of barium.
(2) The amount and rate of the flow of the contrast medium into the colon is
controlled by means of a clamp on the outlet tubing or by pinching the tubing between
(3) Posturing of the patient, fluoroscopy, palpation, spot-filming, and
radiography are carried out according to the established procedures or the particular
needs of the case.
(4) When administering air into the colon for double-contrast studies, the
procedure is as follows.
The outlet tubing is clamped off.
(b) The inflator bulb is pumped until the desired amount of air has been
administered to the colon (this is determined by the radiologist).
(c) Subsequent steps of the examination are carried out according to
Figure 2-13. Large bowel, PA (double-contrast study, post-evacuation view).