Disorders of Omasum and Abomasum

Question 1

What is the function of the omasum?

Answer 1

• Water absorption
• Electrolytes
• VFAs
• Reduces particles size

Question 2

Omasal disorders result in a _______ appearance

Answer 2

Papple

Question 3

How to treat omasal impaction?

Answer 3

• Fluids
• Change diet, give slurry

Question 4

Causes of abomasal ulcers?

Answer 4

- SARA
- NSAIDs (COX 1 inhib)
- Helicobacter
- Stress
- Mastitis
- Metritis
- Hypocalcemia

Question 5

List the 4 types of abomasal ulcers

Answer 5

1. Non perforating
2. Nonperforating but severe bleeding/blood loss
3. Perforating with local peritonitis
4. Perforating with diffuse peritonitis

Question 6

CS of abomasal ulcers?

Answer 6

• Melena
• Bruxism
• Anemia (Type 2 ulcer)
• HR > 100 (Type 3 and 4)

Question 7

How to diagnose abomasal ulcers?

Answer 7

• Fecal occult test (trust a +)
• U/S
• Ab tap (For Type 3 and 4)

Question 8

How to treat abomasal ulcers?

Answer 8

• Fluids
• PPIs (omeprazole)
• Sulcralfate
• Famotidine
• Fix underlying cause
• Correct diet

Question 9

What presents like abomasal lymphoma?

Answer 9

Type 2 abomasal ulcers

Question 10

How is the abomasum most commonly displaced?

Answer 10

LEFT displacement

Question 11

Cause of displaced abomasum?

Answer 11

• Post partum (off feed, stressed)
• High producing dairy cows

Abomasal hypomotility is a prerequisite

Question 12

CS of RDA/Volvulus?

Answer 12

• EMERGENCY
• HR > 100
• Shocky
• Ping on auscultation
• Absent rumen sounds

Question 13

How to diagnose abomasal displacement?

Answer 13

• Liptak test: pH < 4.5, almond odor
• Hypochloremic, hypokalemic, metabolic alkalosis, aciduria