Internal medicine (gastroenterology) Flashcards
what are the clinical signs of oropharyngeal/oesophageal disease?
dysphagia
saliva drooling
halitosis
odynophagia (painful swallowing)
regurgitation
what is odynophagia?
painful swallowing
what are the ways in which dysphagia can be described?
difficulty lapping or forming bolus
excessive jaw/head motion
dropping food from mouth
saliva drooling
persistent/ineffective swallowing
nasal discharge
gagging/coughing
what are the two reason dysphagia can occur?
functional - abnormal neuromuscular activity
morphological - structural abnormalities
what are some functional causes of neuromuscular dysphagia?
cricopharyngeal achalasia
myasthenia gravis
brainstem disease
peripheral neuropathy
polymyopathy
what could cause morphological dysphagia?
oropharyngeal inflammation/trauma
foreign bodies
neoplasia
congenital deformities
what is inflammation of the oral mucosa called?
stomatitis
what is inflammation of the lips called?
cheilitis
what is inflammation of the tongue called?
glossitis
what is inflammation of the gums called?
gingitvitis
what is inflammation of the pharynx called?
pharyngitis
what is inflammation of the tonsils called?
tonsilitis
what are some congenital morphological causes of dysphagia?
lip-fold deformities
cleft palate
malocclusion
craniomandibular osteopathy
how would regurgitation be described?
a passive event of undigested food covered in mucus/saliva being brought up the oesophagus (immediately after eating)
what is pseudoptyalism?
failure to swallow normal volume of saliva
what is ptyalism?
increased saliva production
what needs to be found out to define whether the animal is vomiting or regurgitation food?
what is brought up
when it is brought up (relation to feeding)
vomiting signs (active process)
concurrent disease
illness duration
what contrast can be used for GI tract?
barium mixed with food
iodine contrast (if perforation suspected)
what are some specialist test that can be used for oesophageal disease?
anti-ACh receptor antibody
2-M antibodies
ACTH stimulation test
what is the anti-ACh receptor antibody test used for?
primary oesophageal disease
what are 2-M antibody tests used for?
see if there are antibodies targeting the muscle of mastication (these are specific to there)
what is the definition of megaoesophagus?
oesophageal dilation with functional paralysis
what are the finding on radiograph of a patient with megaoesophagus?
uniformly dilated with gas/fluid filling
ventrally displaced trachea
possible secondary aspiration pneumonia
why is fluoroscopy occasional essential to diagnosing megaoesophagus?
can determine dysmotility of oesophagus
how can idiopathic megaoesophagus be treated?
feeding from a height (upright)
textured food/balls or slurry
metoclopramide (improve motility)
what is the prognosis for patients with idiopathic megaoesophagus?
guarded - often get aspiration pneumonia
what are possible causes of oesophagitis?
ingestion of caustics/irritants
foreign bodies
acute/persistent vomiting
gastric reflux
what are the clinical signs of oesophagitis?
anorexia
dysphagia
odynophagia
regurgitation
hypersalivation
how is oesophagitis treated?
(rest oesophagus)
frequent small soft feeds
liquid antacids
local anaesthesia
how can sucralfate aid oesophagitis treatment?
gastric protectant - coats mucosa of oesophagus
what is the aetiology of oesophageal strictures?
fibrosis after ulceration due to… foreign bodies, caustic agents, gastric reflux, drugs, severe oesophagitis
how can oesophageal strictures be treated?
dilation - bouginage or balloon
what is the disadvantage of using bougienage to dilate oesophageal strictures?
increased risk of perforations compared to balloon dilation
what is the most common place for oesophageal foreign bodies?
lower oesophageal sphincter (also heart base and thoracic inlet)
how are oesophageal foreign bodies treated?
removal via endoscopy (surgery is a last resort)
what should always be done after removal of an oesophageal foreign body?
radiograph (check for pneumomediastinum) - this can indicate a tear
what is primary vomiting due to?
underlying gastric disease
what is secondary vomiting due to?
non-GI disease
what is the events that happen after the vomiting centre is triggered to cause vomiting?
pylorus is contracted
stomach and lower oesophageal sphincter relaxes
abdominal muscles contract
glottis is closed
upper oesophageal sphincter opens
antiperastalsis propels food towards the mouth
what can switch on the vomiting centre of the brain?
duodenum
stomach
pharynx
vestibular system
chemoreceptor trigger zone
what are some possible secondary causes of vomiting?
infections, pyometra, renal failure, drugs, CNS disease, motion sickness, vestibular disease, neoplasia…
what can cause chronic vomiting?
intestinal/peritoneal disease
primary gastric disease
diffuse GI disease involving stomach
what are some causes of chronic vomiting secondary to intestinal/peritoneal disease?
inflammatory bowel disease
intestinal neoplasia
small intestinal obstruction
pancreatitis
peritonitis
what primary gastric diseases can cause chronic vomiting?
chronic gastritis
gastric retention disorders
gastric ulcers
gastric neoplasia
what diffuse GI diseases involving the stomach can cause chronic vomiting?
inflammatory bowel disease
alimentary lymphoma
what are the three basic models of the pathophysiology of gastric disease?
gastric outflow obstruction
gastroparesis
disruption of mucosal barrier
what diagnostic clinical pathological tests can be done for vomiting animals?
electrolytes
haematology
bile acid stimulation test
ACTH stimulation
urinalysis
pancreatic lipase
what are some possible causes of chronic gastritis?
dietary intolerance
chronic gastric parasites
hairballs
immune mediated
what are the clinical signs of chronic gastritis?
intermittent chronic vomiting
periodic early morning vomit with bile
poor appetite
gastric bleeding
what are the possible treatment options for chronic gastritis?
removal of aetiological agent
diet - trials, multiple small meals…
acid blockers
corticosteroids
what is the best diet for chronic gastritis cases?
hydrolysed protein diet
when does bilious vomiting usually occur?
vomiting occurs overnight/morning in dogs fed once a day (especially in the morning)
what is the presumed aetiology of bilious vomiting?
abnormal internal motility allowing bile reflux into the stomach
how can bilious vomiting be treated?
feed more often (later in the day)
prokinetics - ranitidine…
what is a gastric retention disorder?
food is retained in the stomach for >8 hours causing delayed vomiting of food (way longer than it should be retained)
what are the possible causes of gastric retention disorders?
anatomical obstruction
functional disorders - motility, inflammatory disease…
what are the possible outflow obstructions to the stomach causing gastric retention disorders?
pyloric stenosis
neoplasia/polyps
foreign bodies
chronic hypertrophic pyloric gastropathy
what prokinetics can be used to treat gastric retention due to a functional problem?
metoclopramide
ranitidine
erythromycin
how does metoclopramide work as a prokinetic for gastric retention?
stimulates normal gastric peristalsis
how does ranitidine work as a prokinetic for gastric retention?
stimulates peristalsis and hydrogen antagonist
how does haematemesis look if blood has been in then stomach for a while?
coffee grounds
what are some possible causes of haematemesis?
generalised bleeding
swallowed blood (oropharyngeal, nasal…)
severe gastritis
gastric ulcer
gastric neoplasia
duodenal disease
what are the clinical signs of gastric ulcers?
haematemesis
melaena
anaemia
weight loss
pain
peritonitis
what posture in associated with abdominal pain?
prayer posture
what are the possible causes of gastric ulcers?
drugs - NSAIDs, corticosteroids
head and spinal injuries
gastritis
liver/kidney disease
bile reflux
mastocytosis
helicobacter
what species of helicobacter causes gastric ulcers?
H. pylori
how are gastric ulcers treated?
sucralfate
acid blockers - antacids, H2 antagonists, proton pump inhibitors
what are some H2 antagonists used to treat gastric ulcers?
cimetidine
ranitidine
nizatidine
what proton pump inhibitor is used for gastric ulcer treatment?
omeprazole
what should not be given with omeprazole to treat gastric ulcers? and why?
NSAIDs as they can worsen intestinal ulceration
what is used to treat helicobacter?
triple therapy (two antibiotic plus an acid blocker)
what is an example of a triple therapy used to treat helicobacter?
amoxicillin, metronidazole, clarithromycin (triple antibiotics)
amoxicillin, metronidazole, omeprazole (2 antibiotics and acid blocker)
what are the majority of the neoplasms found in the stomach of dogs?
adenocarcinomas
where do gastric adenocarcinomas often metastasise to?
local lymph nodes and liver
when would you suspect a gastric adenocarcinoma?
older animals with chronic vomiting, anorexia, weight loss, haematemesis, anaemia and saliva drooling
what is the prognosis for gastric adenocarcinomas?
hopeless (surgical resection is rarely curative and often painful)
what is chronic diarrhoea?
diarrhoea that has been present for more than 2 weeks
what are the steps for approaching diarrhoea cases?
history/physical exam
symptomatic therapy
laboratory investigations
diagnostic imaging
GI biopsy
therapeutic trials
what are the main alimentary disease differentials diagnoses for diarrhoea?
adverse food reactions
inflammatory bowel disease
antibiotic responsive diarrhoea
lymphangiectasia
lymphoma/tumour
infectious diarrhoea
partial obstructions