Displaced Abomasum (DA) Flashcards

Vocabulary flashcards covering the classic presentation, diagnostics, treatments, and herd pearls for Displaced Abomasum (DA) in dairy cattle based on the lecture transcript.

Displaced abomasum (DA) classic presentation

A multiparous dairy cow within 30 d of calving presenting with partial anorexia, decreased milk production, and scant stool with different consistency from herdmates.

Popped or sprung rib cage

A physical sign where ribs are pulled outward, observed in cases of displaced abomasum.

LDA ping location

A high-pitched tympanic or musical ping along a line between the L elbow and L tuber coxae (hip) along ribs 9-13.

RDA ping location

A high-pitched tympanic or musical ping on the R side +/- abomasal volvulus along ribs 10-13.

Papple shape

An abdominal contour describing a shape that is pear on L, apple on R, characteristic of RDA with volvulus.

Expected acid-base abnormality in DA

Hypochloremic metabolic alkalosis due to sequestration of acid (HCl) by the twisted abomasum (with possible acidosis if progressed to circulatory failure).

Liptak test

A diagnostic test performed by inserting a 4.5-inch spinal needle transabdominally just ventral to the ping and aspirating fluid; an acidic result confirms abomasal fluid.

Medical treatment for LDA

Non-surgical management indicated only in LDA (often unrewarding) that can include IV or oral calcium supplementation, transfaunation, and gastric stimulants.

Surgical options for DA

Procedures including roll and toggle/blind stitch, abomasopexy, and omentopexy.

Herd intervention threshold for DAs

A threshold requiring herd intervention if the prevalence of DAs exceeds 1%.

DA predisposing factors

Ketosis, subclinical hypocalcemia, and uterine disease.