DC Sem 2 Flashcards
What are some common ddx for oesophageal luminal obstructions?
FB Neoplasia Hiatal hernia Oesophageal stricture Infectious (spirocercosis)
What are some causes of acquired megaoesophagus?
- Neuromusc/ immune mediated (eg. myasthenia gravis)
- Endocrine (hypoA, hypoT?)
- Gastrointestinal (oesophagitis)
- Paraneoplastic (thymoma)
- Toxic (lead, OPs)
- Incidental (excitement, GA, vomiting)
What is pyridostigmine?
drug used in tx of MG. It works by inhibiting acetylcholine esterase (increases Ach signalling)
What would you use in a treatment trial to rule out parasites in a dog with diarrhoea?
Fenbendazole 50mg/kg every 24hours for 3 days
Would also do faecal screening (smear, Zn sulphate floatation and/ or Giardia ELISA)
What are some examples of oral protectants?
Kaolin-pectin
Bismuth
Activated charcoal
What are some examples of anti-acids?
Omeprazole
Famotidine/ ranitidine
What are the classifications of a hernia?
Congenital/acquired
True/ False
Reducible/ incarcerated
Strangulated
What are 9 nine locations of hernias? Which of these are associated with non-traumatic acquired or congenital hernias?
- Paracostal
- Dorsal lateral
- Inguinal**
- Umbilical**
- Femoral**
- Scrotal**
- Perineal***
- Prepubic rupture
- Ventral/ subxiphoid
What are breed dispositions for congenital inguinal hernias? What are predispositions for acquired inguinal hernias?
Congenital: young male dogs, CKCS, cocker spanie, daschund
Acquired: older entire females. obesity, perineal hernias in intact males
What is the difference between the two main types of abdominal hernias?
- Traumatic- lacks a true peritoneal sac increasing risk of incarceration (blunt force trauma at region of abdominal wall attachment)
- Incisional- rare. after OVH. fat entrapped in incision or inappropriate suture material/ handling
What are the breed dispositions for a perineal hernia? What are other potential causes?
Older entire male dogs Pekingese, boston terrier, corgi, boxer, poodle, bouviers, old english sheepdogs Pot causes: Androgens gender differences relaxin prostatic disease neurogenic atrophy
What are the surgical treatment options for a perineal hernia?
- Traditional herniorrhaphy
- Internal obturator muscle transposition
- Superficial gluteal transposition
- Semitendinosus
- Prosthetics- mesh
**always castrate at same time. May also consider colopexy, cystopexy, ductus deferopexy to prevent caudal movement
What is the difference between regurg and vomiting?
Regurg= passive process. No nausea or retching, no repeated swallowing. Sign of oesophageal disease. No bile or digested food
Vomiting is the opposite of this. Involves salivation (to neutralise gastric contents), swallowing, relaxation of GO sphincter, retrograde giant contractions (against a closed glottis) and expulsion of ingesta.
What are ddx for ACUTE vomiting?
Gastroenteritis Septic or other peritonitis Pancreatitis Acute haemorrhagic diarrhoea syndrome Intestinal obstruction
Where are the most common sites for intussusception? What are some predisposing causes?
Ileocolic junction and jejunojejunal
Active enteritis in young animals (deranged motility)
Acute renal failure, neoplasia or previous intestinal sx
What is cPLI?
Canine pancreatic lipase produced exclusively by pancreas. Not altered by pred and has very high sensitivity in acute forms.
What things may lead to the onset of acute pancreatitis? What are potential clinical signs?
High fat/ low protein diets (in dogs, not so much cats)
Hyperlipidaemia
Drugs (azathioprine, KBr)
Trauma
Hypoxia
Potential CSs:
vomiting, diarrhoea, anorexia*, jaundice, abdominal pain, DKA, cardiac arrhythmias, acute renal failure, resp distress, CNS signs
In regards to pancreatitis, gastric acid suppression should be avoided unless…?
there is melena, haematemesis or regurg consistent with reflux oesophagitis
In which breeds is myasthenia gravis as a cause of acquired non-obstructive regurgitation common?
GSDs, Golden retrievers, Abyssinian, Somali, Siamese
What are some causes of acquired non-obstructive regurgitation?
- Neuromusc or immune-mediated (MG, distemper)
- Gastrointestinal (oesophagitis)
- Toxins (Lead, OPs, snake venom)
- Endocrine (hypoA, hypoT)
- Paraneoplastic (thymoma)
- Incidental (excitement, aerophagia)
What are the four mechanisms of diarrhoea?
- Osmotic (poorly absorbable osmotically active solutes)
- Secretory (abnormal ion transport)
- Increased mucosal permeability
- Deranged motility
What are common clinical signs of parvo in dogs and what are some main differentials?
Anorexia, vomiting, haematochezia
- FB
- Int intussusception
- Garbage disease
- Severe parasite infestation
What are some DDx for bacterial enteritis?
- Parvo
- Parasite infestation
- Dietary indiscretion
- Acute haemorrhagic diarrhoea syndrome
- Tritrichomonas (in cats only)
Are antacids indicated for chronic vomiting?
Not unless the patient is uraemic (in which case it will bind to PO4). Otherwise it may cause a rebound gastric hyperacidity and/or interfere with drug absorption
How long should gastric acid modifiers be used for?
If ulcers are NSAID induced-> 2-4 weeks
If induced by severe oeophageal reflux-> 4-6 weeks
What are some disadvantages of using proton pump inhibitors?
When used with NSAIDs, causes duodenal ulceration
PPI causes dysbiosis
What are some differential diagnoses for chronic vomiting?
Infl bowel disease/ chronic enteropathy Dietary intolerance/ sensitivity Intestinal lymphoma Chronic pancreatitis Structural Neoplasia HyperT HypoA Liver disease/ renal failure etc
Before diagnosing gastric ulceration, what needs to be ruled out?
Drugs (incl. over the counter)
Systemic disease
Infl intestinal disease
Neoplastic disease
What dog breeds are predisposed to EPI?
Chow chows, collies and GSDs
Hypoalbuminaemia is albumin levels below…?
13g/L
How is FIP diagnosed?
It is a dx of exclusion. Take into account:
- Hx and signalment (young cats)
- Hyperglobulinaemia
- Mild-mod anaemia
- Stress leukogram
- green-yellow abdo fluid, often mucinous
- Rivalta’s test
- fluid immunohistochem
- RT-PCR
What are some differential diagnoses for chronic abdominal pain?
- Chronic infl of pancreas or urinary tract
- Chronic gastric dilatation
- Gastric ulceration
- Infiltrative neoplasia
- Functional Intestinal spasm
- MS disease
(any “-itis” or ulceration, distension, torsion or compression)
What are some signs of large intestinal disease? What about colitis?**
- mucoid faeces**
- haematochezia**
- tenesmus**
- dyschezia
- weight loss/ vomiting (occasionally)
- constipation
- rectal prolapse/ perineal swelling
What are our main differentials for colitis in Australia?
- Fibre responsive (idiopathic) colitis
- IBD
- C. perfringens overgrowth
- Trichuris vulpis
Most LI conditions can be diagnosed with rigid proctoscopy. Some cannot though. Examples include…?
- Occult trichuriasis
- Ileocolic or caecocolic -Intussusception
- Typhlitis
- Neoplasia localised to transverse or ascending colon
Tritrichomonas foetus causes colitis with increased frequency of defecation. What cat breeds are predisposed? How may it be diagnosed and treated?
Bengals Dx (in order of increasing sensitivity): -Faecal smear (look for it moving) -Specific culture system -PCR Tx: Ronidazole (beware of side effects- neurological)
IBS is a poorly defined disease of dogs. What may the disease involve?
Altered bowel motility, visceral hypersensitivity, psychosocial factors, NT imbalance, mucosal inflammatory cytokines
What are the different types of colitis?
- LP
- Clostridial
- Granulomatous
- Tritrichomonas foetus
- IBS
What are your main ddx for haematochezia?
- colitis
- infectious disease
- metabolic disease
- rectal adenocarcinoma
- rectal polyp
To dx idiopathic megacolon, what needs to be ruled out first?
Pelvic stenosis
Neurological disease
Neoplasia
Metabolic disease