Displaced abomasum

1M post calving (Fresh dairy cows)

(Hypocalcemia, twinning, metritis, low fiber/high concentrates)

When do we most commonly see a LDA(Left displaced abomasum)?

Fever

Reduced millk yeild

Hunched position (Withers test)

Dehydration

Ketotic breath

What are clinical signs of LDA?

Roughage

Grain

A ruminant that is eating ___ and refusing ____ most should be investigated for abomasal displacement?

Rumen contractions in caudal paralubar fossa

Tinking/pinging sounds

What will we hear on auscultation of an LDA?

Paracentesis of fluid from where rumen should be

pH of 2, no protozoa

What is the Liptak test?

Stomach tube - blow and listen for bubble - if not present then likely something blocking Rumen

What is most commonly done to dx a LDA?

Hypochloremia, hypokalemic Metabolic ALKALOSIS

What clinpath abnormalities will we see w/ a LDA?

Paresis/ downers -> electrolyte abn

Diarrhea (decreases the prognosis)

What are complications that can be seen w/ Dispalaced abomasum?

Possible for farm staff to do

75% recurrence

poss to over correct

Explain Rolling as a tx for LDA?

R flank laperotomy -> Standing cow w/ distal paravertebral analgesia

-deflate abomasum and do an omentoplexy

What is the most common sx attempt to tx a LDA?

Cow rolled, then auscultated, blindly tied into place

-increased risks but cost-effective (NO PING, NO POKE) Done in dorsal recumbancy

What is toggling?

Hypocalcemia

Ketosis

Mastitis/ metritis

Ulcers

Name a few concurent dz that we should look for if we have a displaced abomasum?

Perforation/ entrapement of other viscera

What are complications of toggling?

Standing,

Exploritory

Safe

1 surgeon needed

What are advantages to a R Flank Omentoplexy?

Limited exploritory

2 people required

laceration/ entrapment of bowels

What are disadvantage of L flank omentoplexy?

Abx - acute endometritis

Fluids + Flunixin meglumine - toxemia/ dehydration

IV glucose -> ketosis

IV calcium

What supportive care should be done for a LDA?

Avoid high concentrates post calving

Acidifying diets for dry periods

How is LDA controled/ prevented?

3-6W Post calving

When is a RDA most likely to occur?

Atony - high concentrates w/ low Ca

What is the primary cause of RDA?

poor milk yeild

Wt loss

Afebrile

Static rumen

What are clinnical signs of RDA?

High pitched ping in R cranial abdomen

What is heard on auscultaion of RDA?

Shock - vasc compromised

Dehydration w/ metabolic desturbances

Type 3 pyloric outflow obstruction

Endotoxemia and necrosis

What will we see if we have volvulus w/ RDA?

R flank omentoplexy/

R paramedian abomasopexy

What is the prefered sx correction for RDA?

RDA - volvulus will happen in hrs to days

Is an RDA or an LDA more likely to result in a volvulus

Hypovolemia induces aldosterone, which tries to keep Na, so H+ is excreted b/c we already have hypokalemia, and it needs a positive ion to exchange for Na

Why do we see a paradoxical aciduria in some RDA cases?

if it has volvulused

When can we palpate a RDA rectally?

Fluids - ringgers/ k+ and poss Ca++

NSAIDS/ Banimine

ABX

What supportive care is given to a RDA volvulous pt?