General
Stats:
- Description: While
performing endoscopy, a contrast material is injected via the endoscope
into the pancreas and bile ducts. X-ray pictures are obtained allowing for
abnormalities to be identified and sometimes treated. A Gastroenterologist
performs the test in a hospital or endoscopy center with the assistance
of nurses and technicians. The Gastroenterologist and a Radiologist interpret
the results. If specimens are obtained, a Pathologist interprets the results.
The test takes 30 to 60 minutes to complete.
- Discomfort - An intravenous
line has to be placed. Depending on the level of sedation, there may be
discomfort associated with swallowing the endoscope. After the procedure,
there may be discomfort related to a sore throat and air that has been placed
into the intestines.
- Results - The Gastroenterolgist's
results are generally available at the end of the study. The results from
the x-rays may take 1-2 days. Results of tissue samples in 2-3 days.
- Risks of Procedure
- Complications occur in 1-5% of cases and include inflammation of the pancreas
(pancreatitis), bleeding, infection, perforation of the intestines, and
adverse reaction to the medications used in the procedure.
- Average Cost - $$-$$$
- Other names: ERCP
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Indication for Test
- To identify the cause
of obstruction of the bile ducts (gallstones, tumors, and strictures), that
may cause abnormal liver tests, pain and/or jaundice.
- To evaluate tumors
of the pancreas when identified by CT or sonogram.
- To identify the cause
of inflammation of the pancreas (pancreatitis). To evaluate the pancreas
before surgery is performed.
- To treat blockages
of the bile ducts or pancreas.
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Preparation
- Nothing should be
consumed for 8 hours before the test, except medications as directed by
your doctor.
- Aspirin, non-steroidal
anti-inflammatory drugs (aspirin substitutes), blood thinners, anticoagulants,
and iron supplements should not be taken for five days before the test to
reduce the risk of bleeding.
- Arrangements should
be made for someone to drive you home after the test.
- Some patients may
receive antibiotics prior to the test.
- You wear a hospital
gown and lie on a x-ray table.
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Procedure
- Your blood pressure
and oxygen levels are monitored during the procedure.
- An intravenous line
is placed for a sedative to be given. A local anesthetic may be sprayed
into the throat to suppress the gag reflex. Supplemental oxygen is given
via the nose.
- A mouthpiece is placed
between your teeth to prevent you from accidentally biting the endoscope.
- After you are sedated,
an endoscope is passed through your mouth and guided down into the duodenum
(the first part of the small intestines just beyond the stomach). The image
from the endoscope is displayed on a TV monitor and the image from the x-ray
machine is displayed on the fluoroscope monitor.
- Air is instilled
into the intestines via the endoscope to aid in viewing the inside lining
of the intestines. Additional medications may be given to suppress contractions
in the intestines and to remove gas bubbles.
- After the endoscope
is positioned correctly in the duodenum, a smaller tube (cannula) is passed
through the endoscope and into the opening of the ampulla of vater in the
duodenum. Contrast dye can then be injected through the cannula into the
common bile duct and into the pancreatic duct.
- X-rays of the ducts
filled with the contrast are then taken.
- If needed, the opening
of the ampulla of vater may be enlarged, gallstones may be removed, tissue
samples may be obtained or a stent (a small tubular structure that supports
open the duct) may be placed to allow drainage of a duct.
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After the Procedure
- Same as for EGD. After
the gag reflex returns, consume only light foods for 24 hours.
- There may be some
cramping of the abdomen as the air instilled during the test passes through
the intestines.
- Pancreatitis (inflammation
of the pancreas) can be induced by the test. If severe abdominal pain or
nausea/vomiting should develop, contact your doctor.
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Factors affecting results
- Same as for EGD.
- The pancreatic or
bile duct may be impossible to fill with contrast dye, particularly if there
is significant disease present.
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Advantages
- The bile ducts and
pancreas can be viewed in great detail allowing for the identification of
abnormalities.
- Tissue samples can
be obtained if needed.
- Some diseases such
as gallstones in the ducts or blockages of the ducts can be treated thus
avoiding the need for surgery.
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Disadvantages
- It may cause discomfort.
- Risk of pancreatitis.
- There is a small
amount of radiation exposure.
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