Abomasum

Question 1

• what is the abomasum

- if it reduces contractility what happens? (6)

Answer 1

• glandular stomach: HCL, pepsin, rennin
• controlled by gastrin and somatostatin
• contracts 18-20/day

if reduced contractility:

• hyponaturaemia
• hypocalcaemia
• hypochloraemia
• hypokalaemia
• metabolic acidosis
• ketosis and acidosis

Question 2

DA

Answer 2

• LDA: 90-95%
• 1 month PP
• high yeilding dairy coes
• change in postion between 30 and 60 days before parturition

Question 3

displacement prevention

Answer 3

• avoid ketosis

- reduce stress

Question 4

displacement diagnosis

Answer 4

• ping of a “tin can”
• puncture
• US

Question 5

Treatment

Answer 5

• roll cow
• blind tack/toggle pin
• surgical
• laparoscopic
• abomasaly pyloropexy/ omentopexy

Question 6

complications

• surigcal (5)
• -abomasaly pyloropexy/ omentopexy (2)

Answer 6

• reoccurrence
• rupture of abomasum
• reduced motility
• peritonitis
• milk vein perforation
• adhesions
• peritonitis

Question 7

RDA volvulus

Answer 7

volvulus has a distended abomasum and fluid
twist around the central axis in the lesser omentum is often clockwise
Dx:
- auscultation and percussion over ribs 9-13 on right
- ballotement: splashing sound
-hypochloraemia, hypokalaemia, metabolic alkalosis
Tx: counter clockewise: omentum is pulled ventrally

Question 8

Ulceration

Answer 8

1: non-perforating ulcers without bleeding
2: ulcers with bleeding in the abomasal lumen
3: perforating ulcers with local aseptic peritonitis
4: perforating ulcers with septic peritonitis

hyperacidity: mucous secretion
hypersecretion: bicarboate secretion
zytotoxic substances: epithelium regeneration

Question 9

ulceration CS

Answer 9

dcereased intake and rumination

• pain
• anaemia
• melaena

Question 10

ulceration Dx

Answer 10

• CS
• pain provocation test
• gastrin and pepsinogen concentration
• abdominocentesis

Question 11

ulceration Tx

Answer 11

• diet

- oral antacids (magnesium oxide, aluminium hydroxide)