FA Med Q4, Retic/Abo II
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C/S of DA vs Volvulus? 5
- HR >100 + Ping
- Complete anorexia
- Sharp ↓Milk
- More abdominal pain and distention
Location for ping with LDA?
- Lower 1/3rd of abd
- 8th ICS to Paralumbar fossa
Classic location for ping with RDA?
- Last 5 ribs in Dorsal 1/2 of Abd
- (cranial to PLF)
DDx for RDA
- Abo Volvulus
- Cecal Dilation/Volv
- Gas in Spiral Colon
- Off Feed Ping (motility present)
DDx for LDA?
- *Rumen Tympany* (Liptak)
- Physometra (bilateral uterine gas)
Ping is heard in last 5 ribs on the right
How do you distinguish between RDA and volvulus?
- HR >100
- Severe C/S's
How can u differentiate RDA from volvulus?
Rectal palpation: Cecum ="french loaf"
how is physometra distinguished from DA?
- pings on R and L
- Palpable via rectal
what are expected CBC findings with DA?
- N unless concurrent disease
Chem & blood gas with DA? 6
- Metabolic alkalosis
- Hyperlactatemia (prognostic w/volvulus)
- Hyperbilirubin (GI stasis)
what circumstances lead to hyperglycemia vs. hypoglycemia?
- Hyper = Volvulus +Shock
- Hypo = 1' ketosis w/neuro signs
- Simple LDA: 80-90
- Volvulus: 60-80
(<60 is near death)
what is paradoxic aciduria in cow with DA/metabolic alkalosis?
- HypoK Cow
- Preserve K in kidney
- Secretes H+ in exchange
- Acidotic urine & Worsens alkalosis
Liptak test with...
(pH of N abomasum = < 4.5)
What type of DA can you do a...
- Blind: LDA only
- L: LDA
- R: LDA or RDA
- Toggle: LDA
Distal paravertebral block...
Where is needle inserted?
What nerves are blocked?
- Insert: L1, 2, 4
- Blocks: T13, L1, L2
for most DA's fluids can be given after surgery, but what circumstance warrants fluids prior to surgery?
volvulus - improve CO
what are some complications after correcting DA?
- Vagal indigestion
- Abscess at sx site
If needed, which Abx post DA Sx?
- Penn if mastitis
who gets abomasal ulcers and what predisposes them?
- All ages of cattle
- ↑Concentrate Diets
- LSA in older animals
1st sign of nonperforating ulcer?
Drop in milk production (esp. after stress of calving)
what mimics perforating ulcer?
what is most common form of abomasal ulcer?
What occurs 2'?
- ⇒lLocal abscesses
- ⇒Localized peritonitis
C/S of cow with diffuse ulcer present (rare)?
- Severe signs/shock
- Widespread peritonitis
What type of ulcer do calves usually get?
Associated with what deficiency?
Perforation w/ Peritonitis
CBC findings with ulcer?
- Leukocytosis w/Neutrophilia
What changes should be made if Dx ulcers?
- Diet: Hay only & No grain
- Reduce stress
what leads to primary functional obstruction of abomasum?
What diets known to predispose?
↓Fiber or ↓water
- Overwintering beef cattle
- Poor quality milk replacer
Contour seen with abomasum impaction?
- Bilateral ventral enlargement
- (Weight loss)
Expected Blood Gas & Chem w/ abomasal impaction?
- Metabolic alkalosis
- (doesnt happen in all)
Tx for abomasal impaction? 4
- Fluids + laxatives
- Terminate pregnancy
- Metaclopramide in early cases
- Rumenotomy - back flush contents
Species/breed likely to get abomasal emptying defect?
- Wt loss
- Abd enlargement
what is chloride level with emptying defect?
- >100 mEq/L
- (normal is 30)
Tx for emptying defect?
- Sx (rumenotomy or backflush)
Hereditary - don't breed
What would you like to do?
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