This document provides information about radiological procedures used to examine the gastrointestinal (GI) tract. It discusses various imaging modalities like fluoroscopy, upper and lower GI tests, ultrasound, CT, MRI and angiography. Specific procedures examined include barium swallow, upper GI series, small bowel series, and barium enema. Contrast agents used include barium sulfate and iodinated contrast. Safety, side effects, doses, and appropriate use of different contrast materials are outlined. Key anatomical planes and regions visualized by different procedures are also mentioned.
Learn Barium Meal & Follow Through for the beginners from a Radiology Resident.For some image description please go through the text book "David Sutton" because i have described these image during my presentation Verbally..There are many animations used inside this presentation so to see all the pictures which are placed layer by layer with the help of animations you simple need to download this presentation first.... Thanx.
Barium meal ppt presentation is very important for radiology resident , radiologist and radiographers. this slide contents lots of barium image and technique, position, indication and modification and lots of information. this presentation help alot thanks .
Learn Barium Meal & Follow Through for the beginners from a Radiology Resident.For some image description please go through the text book "David Sutton" because i have described these image during my presentation Verbally..There are many animations used inside this presentation so to see all the pictures which are placed layer by layer with the help of animations you simple need to download this presentation first.... Thanx.
Barium meal ppt presentation is very important for radiology resident , radiologist and radiographers. this slide contents lots of barium image and technique, position, indication and modification and lots of information. this presentation help alot thanks .
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Bile canaliculi >> Canals of Hering >> intrahepatic bile ductule (in portal tracts / triads) >> interlobular bile ducts >> left and right hepatic ducts >>
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Together these form the common bile duct which joins the pancreatic duct
These pass through the ampulla of Vater and enter the duodenum
personality development.
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Anatomy and imaging of wrist joint (xray and MRI).
this ppt was made as the class presentation by Kajal Jha as the part of the course of BSC MIT at BPKIHS,Dharan . It covers the part of syllabus of third year of BSC MIT of this institution.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
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Model Attribute Check Company Auto PropertyCeline George
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Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
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Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
4. WHERE ARE YOU???
Liver, gall bladder Stomach,spleen,left
colic flexure
Stomach,
duodenu
m,pancre
ase
Aorta,IV,
Coils of
SI,Stoma
ch
Rt kidney and
ureter and
decending
colon
Caecum,vermi
form
appendix
Urinary
bladde
r,coils
of
SI,enla
rged
Lt kidney and ureter ,
decending colon
Sigmoid
colon
6. The complete human digestive system is made up of the
gastrointestinal tract (esophagus, stomach, and
intestines) and the accessory organs of digestion
(the tongue, salivary glands, pancreas, liver and
gallbladder).
The tract is divided as
Upper GI tract and
Lower GI tract
7. On embryologic grounds, the GI tract should be divided
into-
upper (mouth to major papilla in the duodenum),
middle (duodenal papilla to mid-transverse colon),
and
lower (mid-transverse colon to anus)
according to the derivation of these 3 areas from the
foregut, midgut, and hindgut, respectively.
8.
9.
10.
11. What types of tests are used to
examine the gastrointestinal tract?
1. Fluoroscopy
2. Upper GI test
1. Types of Upper GI Tests
1. Barium swallow (esophagography)
2. Upper GI series
3. Small bowel series
3. Lower GI test
1. Types of Lower GI Tests
1. Air contrast barium enema (also called double contrast
barium enema)
2. Barium enema
13. 8. Radionuclide imaging
Inflammatory bowel disease
Gastro-oesophagel reflux
Gastric emptying
Bile reflux study
Meckel’s scan(A Meckel's scan is an imaging test used to detect a Meckel's
diverticulum. This is a small, abnormal pocket that forms in the wall of your child's small
intestine)
Gastrointestinal bleeding
14.
15. Fluoroscopy
Fluoroscopy is a type of X-ray that allows part
of the body to be studied in motion and
recorded on a video monitor.
This type of X-ray is used to examine the
gastrointestinal (GI) tract (esophagus,
stomach, small intestine, large intestine
(colon) and rectum) so that your physician
can detect abnormalities in the size, shape,
position or functioning of these organs.
16. Upper GI test
the patient drinks a contrast solution that
contains barium.
The barium solution is sweetened and
flavored, but does taste chalky.
As the barium passes through the digestive
tract, it provides an outline of the swallowing
process as well as the esophagus, stomach
and part of the small intestine.
17. This test is used to diagnose –
hiatal hernias (Hiatal hernia is a condition in which the upper portion of the stomach
protrudes into the chest cavity through an opening of the diaphragm called the esophageal hiatus.
This opening usually is only large enough to accommodate the esophagus)
ulcers, tumors,
Diverticulitis (medical condition that causes inflamed pouches in the lining of your intestine)
esophageal varices (Esophageal varices are enlarged veins in the esophagus.
They're often due to obstructed blood flow through the portal vein, which carries blood from the
intestine, pancreas and spleen to the liver),
obstruction, narrowing, or enteritis (inflammation of the small
intestine lining).
18. It may also be used to determine the causes
of swallowing problems, reflux, abdominal
pain, diarrhea, unexplained vomiting or
weight loss or bleeding
19. Contrast materials
used to improve pictures of the inside of the
body produced by x-rays, computed
tomography (CT), magnetic resonance (MR)
imaging, and ultrasound
allow the radiologist to distinguish normal
from abnormal conditions.
are not dyes that permanently discolor
internal organs.
20. are substances that temporarily change the
way x-rays or other imaging tools interact
with the body
help distinguish or "contrast" selected areas
of the body from surrounding tissue. By
improving the visibility of specific organs,
blood vessels or tissues, contrast materials
help physicians diagnose medical conditions.
21. Barium-sulfate is the most common contrast
material taken by mouth, or orally.
It is also used rectally and is available in
several forms, including:
powder, which is mixed with water before
administration
liquid
paste
tablet
22. used to enhance x-ray and CT images of the
gastrointestinal (GI) tract, including:
pharynx
esophagus
stomach
the small intestine
the large intestine (colon)
23. How safe are contrast
materials?
Contrast materials are safe drugs; adverse
reactions ranging from mild to severe do
occur but severe reactions are very
uncommon.
While serious allergic or other reactions to
contrast materials are rare, radiology
departments are well-equipped to deal with
them.
24. Side effects and adverse and
allergic reactions
tell your doctor if these mild side effects of
barium-sulfate contrast materials become
severe or do not go away
stomach
cramps
diarrhea
nausea
vomiting
constipation
25. Tell your doctor immediately about any of
these symptoms:
hives
itching
red skin
swelling of the throat
difficulty breathing or swallowing
hoarseness
agitation
Confusion
fast heartbeat
bluish skin color
26. You are at greater risk of an adverse reaction
to barium-sulfate contrast materials if:
you have a history of asthma, hay fever, or other
allergies, which will increase your risk of an allergic
reaction to the additives in the barium-sulfate agent.
you have cystic fibrosis, which will increase the risk of
blockage in the small bowel.
you are severely dehydrated, which may cause severe
constipation.
you have an intestinal blockage or perforation that could
made worse by a barium-sulfate agent
27. BARIUM
Barium suspension is made up of barium
sulphate.
(barium carbonate is poisonous)
BaSO4 is an ionic salt of barium (Ba), a
metallic chemical element with atomic
number 56.
28. Unlike barium and many of its other salts,
barium sulfate is insoluble in water and
therefore very little of the toxic barium metal
is absorbed into the body.
29. Indications
It is the preferential contrast agent for
gastrointestinal (GI) examinations due to:
high attenuation of x-rays
lack of absorption from the gut into the body
lack of toxicity (in the gut)
30. Contraindications
known or strongly suspected gastrointestinal perforation
may be used in evaluation for possible esophageal
perforations
large volume aspiration risk
prior allergic reaction (rare)
left-sided colonic obstruction (relative contraindication)
if the barium cannot exit the colon, it has the potential
to become inspissated and very hard, leading to a
quite problematic constipation
31. Complications
may cause a peritonitis if they leak into the
peritoneal space.
Barium migration into the bloodstream,
known as intravasation is a serious and rare
complication
recent research suggests that these concerns
are unfounded and no case reports of
clinically-significant barium-induced
pleural/mediastinal inflammation exist.
32. Ba as Contrast agent
A non ionic suspension is used(for otherwise
the barium particles would aggregate into
clumps)
Ba particle size must be small(0.1-3
micrometer)
The resultant solution has the PH of 5.3
which makes it stable in gastric acid.
33. Barium Studies For GI Tract
s/no Type of study Proprietary
name
Density(W/V) Volume
(ml)
Parts to be examined
1 Barium
swallow
E-Z HD 250% 100 Oesophagus
2 Barium Meal E-Z HD 250% 135 Stomach
3 Barium follow
through
E-Z Paque 60-100% 300 Small bowel
4 Small bowel
enema
E-Z Paque 60% 1500 Small bowel
5 Barium enema Polibar 115% 500 Rectum,sigmoid
colon,decening,transve
rse and acending
colon,caecum
34.
35. Doses and concentration of
Barium Sulphate used
S/NO STUDY TYPE CONCENTRATION
(W/V)
APPROX.QUA
NTITY (ml)
1 Barium Swallow Single contrast 100% varriable
Double contrast
250%
varriable
2 Upper GIT study Single contrast 82-100% 300-350
Double contrast 200-250% 200
50% 500-600
3 Ba MFT
Enteroclysis
Single contrast 20% 800-1200
Double contrast 85% 200
4 Barium enema Single contrast 15-20% Varriable
Double contrast 60-110% varriable
5 CT Abdomen 1-5% 800-1000
36. Choice of contrast media
Non ionic contrast media are the prefered
agents in almost all contrast rdiographic
studies:
Low osmolarity
Higher radiographic density
Lower incidence of idiosyncreatic and nin
iodiosyncreatic reactions
37. The only limiting factor in their widepread use
is their cost.
The current trend is to weight the cost benefit
of use of various contrast media.
38. s/no study indication Agent used Comments
1 IVP Routine Ionic water soluble
contrast
Low cost
Congestive heart
failure in eldery
children
Non ionic water
soluble contrast
agents
Low osmolarity,
therefore less
hemodynamic impact.
Less water loss
through kidney
Atropy,asthama,p
revious drug or
contrast reaction
Non ionic water
soluble
Low incednce of
idiosyncrar=tic
reaction as compared
to ionic contrast agent
2 GIT
STUDIES
Routine single
contrast
95% w/v BaSo4
suspension
Routine double
contrast
250% w/v BaSo4
suspension
39. s/no study indication Agent used Comments
2
(contd)
Ba
Swallow
H/O aspiration in
child Non ionic
water
soluble
contrast
Because of its high osmolarity
ionic contrast agents draw
water into alveoli if aspirated,
causing sever pulmonary
odema. Therefore ionic
contrast agents are totally
contraindicated in these
conditions,and non ionic
agents are used
Suspected tracheo-
oesophageal fistula
Oesophageal
perforation
Ionic or non
ionic
contrast
agents
Leakage of BaSo4 into
mediastinum can lead to
mediastinal fibrosis
3 Ba Meal
or Ba
Enema
Routine BaSo4
suspension
•Abdominal trauma
•Perforation
peritonitis
•Post operative
Water
soluble
contrast
agent
Ionic or non ionic agents may
be used as BaSo4
suspension. Leakage can
cause peritoneal adhesion and
uretric or bowel obstruction
40. s/no study indication Agent used Comments
3 Ba Meal or Ba
Enema
Pre operative Water soluble
contrast agent
Study with BaSo4
suspension will
preclude any abdominal
surgery for 7 days
Meconium ileus Ionic contrast
agent
Because of their high
osmolarity these agents
draw water into bowel
lumens and can soften
the meconium and
relive obstruction.
41. s/no study indication Agent
used
Comments
4 Follow
through
examination
Suspected
large bowel
obstruction
Water
soluble
contrast
BaSo4 suspension can cause
impaction because of water
resorption in colon. Ideally in these
conditions a barium enema or
colonscopic examination must be
done. If, however , an oral follow
through contrast examination is
indicated a water soluble contrast
agent should be used.
5 angiography Cerebral
angiograph
y routine
Non ionic
contrast
media
•Non ionic contrast media are more
comfortable in a conscious patient
as they cause less vasodialation
•Na+ containing ionic contrast
agents are toxic to vascular
endothelium and may cause
disruption of BBB and cerebral
odema. So if ionic contrast are used
meglumine salts are prefered over
Na+.
42. s/no study indication Agent
used
Comments
5 angiogr
aphy
Renal
arteriography
Non ionic
contrast
media
Ionic contrast media can causse renal
tubular damage and therefore best
avoided for this application.
Coronary
arteriography
Nonionic
contrast
media
•They have safe hemodynamics and
myocardial profile.
•Experimental research suggests that
addition of Na + to these agents reduce
the risk of arrhythmias associated with
the procedures.
Ionic
contrast
agents
•If use, these agents should have
physiological level of Na+ which reduces
the risk of arrhythmias.
•Pure solutions of both meglumine and
Na+salts is cardiotoxic, therefore a
combination of the two should be used.
•Should have Ca++ binding property,
therefore Ca++ EDTA is used as a
stablising agent instead of Na+EDTA.
43. s/no study indication Agent used Comments
5 angiography Peripheral
arteriography
routine
Non ionic
contrast
agent
Prefered as they cause less pain,
warmth and discomfort and obviate
the need of general anethesia.
Ionic dimer
agent(Hexa
brix)
Second best to non ionic contrast
agents, but have toxicity for vascular
endothelium because of Na+
content.
If used, meglumine containing salts
are prefered as Na + containing
salts are toxic to vascular
endothelium and cause more pain
Ionic
monomers
Angiography
with
angioplasty
Ioxaglate(H
exabrix):
It is preferred agent for angiography
because of its antip;atelet and
antithrombotic action.
Ionic dimer Bacause of its Na+ content, it
maintains physiological level of Na+
and therefore preferred in coronary
interventions.
44. s/no study indication Agent
used
Comments
5 Angiograph
y
Peripheral
angiography
in patient with
previous
sever
contrast
reaction
CO2 CO2 has been used as a negative
contrst for peripheral angiography using
digital substraction unit with varriable
results.
Renal or
peripheral
angiography
ina a patient
with renal
failure
Gadolini
um
chelates
Radiodensity of Gd is less than iodine
and their cost is high. But theoritically
Gd chelated can be used in patients
with renal failures, because of their safe
profile in such patients.
6 CT Routine
abdominal
scanning
Iodinate
d
contrast
agent 2-
5 % w/v
Poor taste and acceptance by the
patiens.
Because of osmotic movement of water
across the bowel mucosa, there is
dilution of contrast at the interphase of
mucosa and bowel lumen. Therefore
mucosal delineation is less clear
compared to BaSO4 suspension.
45. s/no study indication Agent used Comments
6 CT
Routine
abdominal
scanning
BaSO4 suspension 1-
3%
Gives better delineation
of mucosa than
iodinated water soluble
agents.
water Gives excellent bowel
wall details when used
with intravascular
contrast enhancement
in high resolution fast
scanning syatem
47. Pharynx, (Greek: “throat”) cone-shaped
passageway leading from the oral and nasal
cavities in the head to
the esophagus and larynx.
The pharynx chamber serves both
respiratory and digestive functions.
Extends from base of the skull to the T6.
48. The anterior portion is the nasal pharynx, the
back section of the nasal cavity.
The nasal pharynx connects to the second
region, the oral pharynx, by means of a
passage called an isthmus.
The oral pharynx begins at the back of
the mouth cavity and continues down the throat to the
epiglottis, a flap of tissue that covers the air passage
to the lungs and that channels food to the esophagus
49. The third region is the laryngeal pharynx,
which begins at the epiglottis and leads down
to the esophagus.
Its function is to regulate the passage of air to the
lungs and food to the esophagus.
50. The oesophagus is a fibromuscular tube,
approximately 25cm in length, that transports food
from the pharynx to the stomach.
It originates at the inferior border of the cricoid
cartilage (C6) and extends to the cardiac orifice of
the stomach (T11).
The oesophagus passed via a hole in the
diapgragm called oesophageal hiatus which is
situated at the level of the 10th thoracic vetebra
51. Oesophageal Sphincters
There are two sphincters present in the
oesophagus, known as the upper and lower
oesophageal sphincters.
They act to prevent the entry of air and the
reflux of gastric contents respectively.
52. Upper Oesophageal Sphincter
The upper sphincter is an anatomical, striated muscle
sphincter at the junction between the pharynx and
oesophagus.
Normally, it is constricted to prevent the entrance of air into
the oesophagus.
Lower Oesophageal Sphincter
The lower oesophageal sphincter is a physiological
sphincter located in the gastro-oesophageal
junction (junction between the stomach and
oesophagus)..
53. Recommended imging
procedures
Ba examination/endoscopy (most common)
Radionuclide imaging(to acess gastro-
oesophageal reflux)
Ct and MRI (to determine the extent of
oesophageal carcinoma and for radiotherapy
planning)
54. Barium swallow
Normal Ba Swallow
Barium swallow showing
esophageal dilatation and
beaking
Ba swallow showing
cervical stricture
55. Indication
Dysphagia (most common)
Carcinoma of oesophagus
Oesophageal strictures, varices and ulceration
Hiatus hernia
Oesophageal reflux
Anaemia
Pain
Assessment of tracheo-oesophageal fistulae
Assessment of site of perforation
56. Contraindication
Oesophageal perforation esulting in leakage
into mediastinal,pleural or periotenal cavities
In such case it is normal to commene the
examination using a water based ionic contrast
agent.
57. Preliminary film
A control film is advised prior to a water
soluble study if perforation is suspected.
58. Imaging technique
The patient is in the erect, right anterior
oblique (RAO) position to throw the
oesophagus clear of the spine.
An ample mouthful of barium is swallowed,
and spot films of the upper and lower
oesophagus are taken.
Oesophageal varices are better seen in the
prone, right posterior oblique (RPO) position,
as they will be more distended.
59. the patient is turned prone and placed in
the right anterior oblique position with a
bolster under the rib cage.
The patient is observed drining barium via
straw to demonstrate the presense of hiatus
hernia.
A hiatal hernia is when your stomach bulges up into your
chest through an opening in your diaphragm, the muscle
that separates the two areas. The opening is called
the hiatus, so this condition is also called a hiatus hernia.
61. Stomach and small bowel
the stomach lies between the oesophagus
and the duodenum (the first part of the small
intestine). It is in the left upper part of
the abdominal cavity.
The four main sections of the stomach are
the cardia, fundus, body, and pyloric part.
62.
63. The small intestine (small bowel) lies
between the stomach and the large intestine
(large bowel) and includes the duodenum,
jejunum, and ileum.
The small intestine is so called because its lumen
diameter is smaller than that of the large intestine,
although it is longer in length than the large
intestine.
64. The duodenum continues into the jejunum at
the duodenojejunal junction or flexure, which
lies to the left of L2 vertebra and is fixed to
the retroperitoneum by a suspensory
ligament of Treitz.
The inferior mesenteric vein (IMV) lies to the
left of the duodenojejunal junction.
65.
66. From proximal (at the stomach) to distal,
these are the duodenum, jejunum, and ileum
The shortest region is the 25.4-cm (10-
in) duodenum, which begins at the pyloric
sphincter.
subdivided into four segments: the superior,
descending, horizontal, and ascending
duodenum.
67. The jejunum is about 0.9 meters (3 feet)
long (in life) and runs from the duodenum to
the ileum.
The ileum is the longest part of the small
intestine, measuring about 1.8 meters (6 feet)
in length.
68. Recommended studies
Barium meal (to investigate the stomach and the proximal
portion of the small bowel.
Hypotonic duodenography can provide
additional information where lesions of the
duodenogram are suspected including
lesions of the head of pancrease.
Small bowel enema and barium follow
through( to examine the small bowel in its entirety)
69. Fibreoptic endoscopy (examination of the upper GI Tract and
used particularly in the assessment of the gastric wall and assiociated
viscera)
Radionuclied imaging(assess the rate of gastric
emptying.also in Mickel’s diverticulum and inflammatory bowel
disease)
CT (to investigate mass lesion of assiociated structures such as
pancrease.)
USG (can be used in the case of pyloric stenosis to measure the
antral wall thickness but isnot the modality of choice.)
70. BARIUM MEAL
Methods
1. Double contrast – the method of choice to
demonstrate mucosal pattern.
2. Single contrast – uses:
a. children – since it usually is not necessary
to demonstrate mucosal pattern
b. to demonstrate gross pathology only
71. Indications
1. Failed upper gastrointestinal endosocpy
2. Dyspepsia
3. Weight loss
4. Upper abdominal mass
5. Gastrointestinal haemorrhage (or unexplained iron-deficiency
anaemia)
6. Partial obstruction
7. Assessment of site of perforation – it is essential that a
watersoluble
contrast medium, e.g. Gastrografin or LOCM, is used.
73. Patient preparation
1. Nil orally for 6 h prior to the examination
2. It should be ensured that there are no
contraindications to the
pharmacological agents used.
Preliminary film
None.
74.
75. The double contrast method:
1. A gas-producing agent is swallowed.
2. The patient then drinks the barium while
lying on the left side,supported by the elbow.
This position prevents the bariumfrom reaching
the duodenum too quickly and so obscuring the
greater curve of the stomach.
Technique
76. 3. The patient then lies supine and slightly on
the right side, to bring the barium up against
the gastro-oesophageal junction.
This manoeuvre is screened to check for reflux,
which may be revealed by asking the patient to
cough or to swallow water while in this position.
The significance of reflux produced by tipping the
patient’s head down is debatable, as this is an
unphysiological position.
If reflux is observed, spot films are taken to record
the level to which it ascends.
77. 4. An i.v. injection of a smooth muscle
relaxant (Buscopan 20mg or glucagon 0.3mg) is given.
The administration of Buscopan has been shown not
to affect the detection of gastrooesophageal reflux or
hiatus hernia.
5. The patient is asked to roll onto the right
side and then quickly over in a complete
circle, to finish in an RAO position.
This roll is performed to coat the gastric mucosa
with barium. Goodcoating has been achieved if
the areae gastricae in the antrum are visible.
78.
79.
80.
81. From the left lateral position the patient
returns to a supine position and then rolls
onto the left side and over into a prone
position.
This sequence ofmovements is required to
avoid barium flooding into the duodenal loop,
which would occur if the patient were to roll
onto the right side to achieve a prone
position.
82. 2. Spot film of the duodenal loop (lying):
a. Prone – the patient lies on a compression
pad to prevent barium from flooding into the
duodenum.
An additional view to demonstrate the
anterior wall of the duodenal loop may be
taken in an RAO position
83. 3. Spot films of the duodenal cap (lying):
a. Prone
b. RAO – the patient attains this position from
the prone position by rolling first onto the left
side, for the reasons mentioned above
c. Supine
d. LAO.
84. 4. Additional views of the fundus in an erect
position may be taken at this stage, if there is
suspicion of a fundal lesion.
5. Spot films of the oesophagus are taken,
while barium is being swallowed, to complete
the examination
85. Aftercare
1. The patient should be warned that his
bowel motions will be white for a few days
after the examination and may be difficult to
flush away.
2. The patient should be advised to eat and
drink normally to avoid barium impaction.
Laxatives may be taken if required.
3. The patient must not leave the department
until any blurring of vision produced by the
Buscopan has resolved.
86. Complications
1. Leakage of barium from an unsuspected
perforation
2. Aspiration of stomach contents due to the
Buscopan
3. Conversion of a partial large bowel
obstruction into a complete obstruction by the
impaction of barium
4. Barium appendicitis, if barium impacts in
the appendix (exceedingly rare)
5. Side-effects of the pharmacological agents
used.
87. BARIUM FOLLOW-THROUGH
Methods
1. Single contrast
2. With the addition of an effervescent agent
3. With the addition of a pneumocolon technique.
Indications
1. Pain
2. Diarrhoea
3. Anaemia/gastrointestinal bleeding
4. Partial obstruction
5. Malabsorption
6. Abdominal mass.
88. Contraindications
1. Complete obstruction.
2. Suspected perforation (unless a water-soluble
contrast medium is used).
89. Patient preparation
Metoclopramide 20mg orally may be given before
or during the examination.
Preliminary film
Plain abdominal film is used if small bowel
obstruction is thought possible.
90. Technique
The aim is to deliver a single column of
barium into the small bowel.
This is achieved by laying the patient on his right
side afterthe barium has been ingested.
Metoclopramide enhances the rate of gastric
emptying. If the transit time through the small
bowel is found to be slow, the addition of an
osmotic water-soluble contrast agent may help to
speed it up.
91. If a follow-through examination is combined
with a barium meal, glucagon is used for the
duodenal cap views rather than Buscopan
because it has a short length of action and
does not interfere with the small-bowel transit
time.
92. Films
1. Prone PA films of the abdomen are taken every
15–20 min during the first hour, and subsequently
every 20–30 min until the colon is reached.
The prone position is used because the pressure on
the abdomen helps to separate the loops of small
bowel.
2. Spot films of the terminal ileum are taken
supine, using a compression pad.
93. Additional films
1. To separate loops of small bowel:
a. compression with fluoroscopy
b. obliques
c. with X-ray tube angled into the pelvis
d. with the patient tilted head down.
2. To demonstrate diverticula: erect film – this
position will reveal any fluid levels caused by
contrast medium retained within the diverticula.
94. Barium meal follow-through in the 70-year-old
patien
95. Lets ponder!!!
1. Preliminary film in any examination is taken
for:
I. To make adjustments in exposure factors
II. To check patient position
III. To demonstrate, identify and localise opacities
IV. All of above
96. II. Indication for water soluble contrast media
is:
a) Suspected perforation
b) Ileocaecal TB
c) Constipation
d) Gastroesophageal reflux disease
97. 3) Buscopan is contraindicated in all except:
1. Myasthenia gravis
2. Paralytic ileus
3. Pyloric stenosis
4. Open angel glaucoma
98. Water insoluble contrast media is used in all
except:
1. Barium meal folloe through
2. Barium swallow
3. Sinogram
4. Barium eneme
99. The method of choice to demonstrate
mucosal pattern in Ba studies is:
1. Single contrast
2. Non contrast
3. Double contrast
4. intravenous
100. In Ba meal sequence antrum and body of
stomach are visualised in the position:
1. Supine
2. Left ant obq
3. Right post obq
4. Left lateral
101. Reference
A guide to radiological procedures.
Research gates
Radiopedia
Clark’s Special procedure in diagnostic imaging.
Satish Bhargabhawa
Radiology refrense articles
BD Chaurasya anatomy book
NCBI book Self
MCQs in Radiology for Residents and Technologists-
Sumeet Bhargava and Satish K Bhargava
102. AIR AND FEELINGS ARE NOT ONLY THE
POWERFUL THINGS YET INVISIBLE. WE
HAVE SOMETHING MORE TO IT. NAME IT
X-RAY.
-Kajal Jha
Editor's Notes
The Primitive gut tube develops during week 3-4 by incorporating the yolk sac during craniocaudal and lateral folding of the embryo. The tube is divided into 3 distinct sections; foregut, midgut and hindgut. Foregut gives rise to the esophagus, stomach, liver, gallbladder, bile ducts, pancreas and proximal duodenum. The midgut develops into the distal duodenum, jejunum, ileum, cecum, appendix, ascending colon, and proximal 2/3 of transverse colon. The hindgut becomes the distal 1/3 of the transverse colon, descending colon, sigmoid colon and the upper anal canal.
Germ layers, formed during gastrulation, are present by two weeks and include endoderm, mesoderm and ectoderm. In humans, the germ tissues are the basis of all tissues and organs.
Endoderm - Epithelial lining and glands
Mesoderm - Lamina propria, muscularis mucosae, submucosa, muscularis externa and serosa
Ectoderm - Enteric nervous system and posterior luminal digestive structures .
Fluoroscopy shows a continuous X-ray image on a monitor, much like an X-ray movie. During the procedure, an X-ray beam is continuously passed through the specific body part being examined. The images are transmitted to a monitor to evaluate the organ’s movement.
The doctors can visualize many body parts, such as the digestive, skeletal, respiratory, urinary, and reproductive systems. In some instances, interventional fluoroscopy is performed. It uses ionizing radiation to guide small instruments such as catheters through blood vessels.
It is a promising procedure because it’s less invasive that only requires a small incision. It substantially reduces the risk of infection and can promote a briefer recovery time, compared to conventional surgical procedures.
When introduced into the body prior to an imaging exam, contrast materials make certain structures or tissues in the body appear different on the images than they would if no contrast material had been administered. Contrast materials help distinguish or "contrast" selected areas of the body from surrounding tissue. By improving the visibility of specific organs, blood vessels or tissues, contrast materials help physicians diagnose medical conditions. Contrast materials enter the body in one of three ways. They can be: swallowed (taken by mouth or orally) administered by enema (given rectally) injected into a blood vessel (vein or artery; also called given intravenously or intra-arterially)
An element (also called a "chemical element") is a substance made up entirely of atoms having the same atomic number; that is, all of the atoms have the same number of protons. Hydrogen, helium, oxygen, nitrogen, carbon, gold, silver, lead, and uranium are well-known examples of elements
It can also be found in some oral contrast preparations used for CT.
Barium can be mixed into high-density or low-density suspensions. Both suspensions typically attenuate x-rays more than water-soluble contrast. High-density barium is preferred over water-soluble contrast for fine-detail evaluation of the gastrointestinal system (e.g. evaluation for early changes from Crohn disease). Suspensions created for CT use are very low density.
Due to its insolubility in water, barium sulfate contrast media are supplied as fine particles of the barium sulfate suspended in water. Often artificial flavourings are added to make the mixture more palatable.
Its allergy profile is favourable with very few reported reactions 1. Historically, allergy was more common when excipients, such as chocolate, were used 1.
Complications
Barium contrast agents may cause a peritonitis if they leak into the peritoneal space. If bowel perforation is suspected, water-soluble contrast is generally preferred 3.
The evidence that barium causes a pleuritis and/or mediastinitis if it leaks into the pleural space and/or mediastinum respectively is weak. The initial work establishing a relationship between barium and pleuritis was performed in cats and the analogy extended to humans on theoretical grounds 4. However more recent research suggests that these concerns are unfounded and no case reports of clinically-significant barium-induced pleural/mediastinal inflammation exist. When looking for an esophageal tear, barium is safe to use after ruling out a large leak with water soluble-contrast 5.
Barium contrast is not directly toxic to the airways (unlike hyperosmolar water-soluble contrast (e.g. Gastrografin)), and in the past it has even been used to create bronchograms 6. Barium does, however, have the potential to plug the distal airways, diminishing the capacity for gas exchange, and barium aspiration may rarely be fatal 8.
Barium migration into the bloodstream, known as intravasation is a serious and rare complication, with the potential to cause fatal end-organ emboli - especially pulmonary, although it is incredibly rare if the contrast is used appropriately
Anatomical Course
The oesophagus begins in the neck, at the level of C6. Here, it is continuous superiorly with the laryngeal part of the pharynx (the laryngopharynx).
It descends downward into the superior mediastinum of the thorax, positioned between the trachea and the vertebral bodies of T1 to T4. It then enters the abdomen via the oesophageal hiatus (an opening in the right crus of the diaphragm) at T10.
The abdominal portion of the oesophagus is approximately 1.25cm long – it terminates by joining the cardiac orifice of the stomach at level of T11.
Modification of technique
To demonstrate a tracheo-oesophageal fistula in infants, a ‘pull back’
nasogastric tube oeosophogram may be performed. A nasogastric
tube is introduced to the level of the mid-oesophagus, and the contrast
agent (barium or LOCM) is syringed in to distend the oesophagus.
This will force the contrast medium through any small fistula
which may be present. It is important to take radiographs in the lateral
projection during simultaneous injection of the contrast
medium and withdrawal of the tube. Although some authors recommend
that the infant be examined in the prone position whilst
lying on the footstep of a vertical tilting table, satisfactory results
are possible with children on their side on a horizontal table. It is
important to watch for any possibility of aspiration into the airway
from overspill. Overspill may lead to the incorrect diagnosis of
tracheo-oesophageal fistula if it is not possible to determine whether
contrast medium in the bronchi is due to a small fistula which is
difficult to see or to aspiration.
Recently, it has been proposed that pull-back studies are not necessary
in the majority of children, as tracheo-oesophageal fistulas
can usually be demonstrated on standard contrast swallow examination,
providing the oesophagus is distended well with contrast
media.1 Pull-back studies are still necessary for intubated patients,
or those who are at high risk of aspiration. It is important to remember that fistulas are usually quite high, and the orifice can be
occluded by an endotracheal tube. This can prevent the fistula being
opacified. This can be rectified by altering the patients position, or
slightly withdrawing the ET tube.