Cattle- Abomasal Dz, Intestinal Dz
Card Set Information
Cattle- Abomasal Dz, Intestinal Dz
vetmed cattle abomasum
vetmed cattle diseases
What are the functions of the forestomachs? (3)
fermentation, particle size, water absorption
What are the functions of the abomasum? (2)
secreting HCl, secreting digestive juices
What are pre-disposing factors to abomasal displacement? (5)
GI (abomasal) atony due to change in diet/high conc diet/ketosis, calving
What are the clinical signs of a simple DA? (5)
decreased milk, decreased appetite, ketosis, ping, splashing
What are the signs of abomasal volvulus? (5)
all those of simple DA + colic, tachycardia, shock, death
What are the metabolic derangements associated with DA? (4)
hypochloremia, hypokalemia, metabolic alkalosis, (very late stages) lactic acidosis
Describe the pathogenesis of LDA.
atony causes abomasum to fill with gas--> becomes buoyant and floats up to left side of rumen--> becomes trapped b/w rumen and left body wall--> partial outflow obstruction
Right DA aka ________.
right abomasal dilatation
Describe the pathogenesis of RDA.
atony causes abomasum to float up to right side--> partial outflow obstruction
Describe the pathogenesis of right abomasal volvulus.
starts as RDA--> twists along a line perpendicular to its long axis--> complete abomasal obstruction--> strangulation of tissue
What are the right flank techniques for correction of a DA? (2)
What is the left flank technique for correction of a DA?
With a right flank abomasopexy, the __________ is secured to the body wall.
What are the indications for left flank abomasopexy? (3)
adhesions, pregnancy, LDA only
With a left flank abomasopexy, suture is placed in the _________ and then passed through the ________ to the ______ of the midline, careful to avoid the _______.
greater curvature of the abomasum; ventral body wall; right; milk vein
Why is it important to remove sutures two weeks after a left flank abomasopexy?
it will wick abomasal fluid through the hole and cause a fistula
How do you roll a DA?
right side down, roll to dorsal recumbancy
What are the types of abomasal ulcers?
perforating and bleeding ulcers
What factors predispose to abomasal ulcers? (3)
stress, NSAIDs, lymphosarcoma
What 2 things are protective against abomasal ulcers?
progesterone of pregnancy, prostaglandin
What are clinical signs of absomasal ulcers? (5)
off feed, melena, anemia, ileus, abdominal pain
How do you treat abomasal ulcers?
bleeding: correct metabolic disturbances, reduce stress; perforating: surgery, treat peritonitis, abdominal lavage
Left side pings.
LDA, rumen gas (usually lower pitched because under less pressure)
Right sided pings that require surgery.
RDA, RAV, cecal volvulus
Right sided pings that do not require surgery.
cecal dilation, intestinal gas, uterine gas, abdominal gas
What is really the only disease process that requires a left flank exploratory?
What aspect of surgical treatment of cecal volvulus is very important?
exteriorization before draining- very contaminated viscous
What is functional intestinal obstruction? What causes it?
ileus-decreased intestinal motility; mastitis, metritis, toxemia, vagal indigestion
What is anatomic intestinal obstruction? What are types of anatomical obstruction?
physical obstruction; intraluminal, extraluminal, strangulating, non-strangulating
What type of intestinal obstruction is a surgical emergency?
What are clinical signs of non-strangulating intestinal obstruction? (7)
depression, anorexia, decrease GI motility, bloating, low milk, no feces, tenesmus
What are clinical signs of strangulating intestinal obstruction? (5)
abdominal pain, tachycardia, dehydration, shock, death
What is a consistent finding with all intestinal obstructions?
dilation of intestines on rectal palpation
How does obstruction cause metabolic alkalosis?
increased Cl- in rumen, which is more severe the more proximal the obstruction is; K+ follows Cl---> hypokalemia
What will you see on the biochem profile of an animal with intestinal obstruction?
hypochloremia, hypokalemia, metabolic alkalosis
What is highly suggestive of intestinal obstruction on exploratory?
distended and non-distended loops of intestine
Invagination of a portion of the intestine into the lumen of adjacent bowel?
The portion of intestines that is inside the adjacent bowel.
The portion of intestine that is receiving the intussusceptum (recipient).
Intussusception tends to occur where...
the mesentery is longer (jejunojejunal, jejunoileal)
Intussusception is usually ___________ and therefore a surgical emergency.
What are clinical signs of mesenteric root torsion? (6)
colic, abdominal distension, no feces, distended bowl loops on palpation, tachycardia, dehydration
__________ is a real danger when you correct an obstruction or intestinal volvulus.