GI SX- 2

Question 1

What is the main blood supply for SI & venous drainage

Answer 1

Cranial mesentery artery

Portal vein

Question 2

Differentiation in CS between partial/ distal obstruction &complete

Answer 2

Less profuse diarrhea with intermittent signs

Question 3

What intestinal changes are associated with simple complete obstructions?

Answer 3

Ischemia, devitalization and body wall edema that occurs orad to the obstruction

Question 4

What blood gas changes are associated with duodenal obstruction?

Answer 4

Hypochloremia hyponatremia metabolic alkalosis

D/T loss of secretions (becomes severely dehydrated)

Question 5

What blood gas changes are associated with low jejunal obstructions?

Answer 5

Metabolic acidosis (resorptive capacity maintained)

Question 6

Linear foreign bodies- anchor point (cat v dog)

Answer 6

Cat- under tongue

Dog- pylorus (can be under tongue )

Question 7

What type of obstruction is linear foreign bodies

Answer 7

Partial obstruction

Often has nonspecific CS

Question 8

Where would a string embed in a linear foreign body?

Answer 8

Mesenteric side

Question 9

Dog: Max SI diameter compared to L5 height

Answer 9

> 2x have greater chance of obstruction

Question 10

Cat: Max SI diameter

Answer 10

Should nit exceed 12 mm

Or SI diameter : cranial L2 endplate >3

Question 11

What are linear obstruction pattern

Answer 11

Accordian/ plication

Comma shaped

Question 12

How is a strangulation obstruction different from mechanical?

Answer 12

Diffuse gas dilation

Question 13

Entertomy- Pro

Answer 13

Less risk of surgical dehiscence

Retains absorptive capacity

Question 14

Where should you make your incision in an enterotomy?

Answer 14

Aborad, because tissue unhealthy/inflamed orad so harder to heal

Question 15

Intestinal R&A cons

Answer 15

Longer surgical time
Greater risk of leakage
Greater potential for stricture
Weight loss & diarrhea

Question 16

Short bowel syndrome

Answer 16

Malabsorption and malnutrition after SI resection (50-85%)

-proximal resection better tolerated than distal (b/c ileum & ileocecolic region is responsible for nutrient absorption)

Question 17

Abdominal policeman

Answer 17

Greater omentum that patches leak and hastens revascularizaton

Question 18

Why should colonic surgery not be performed?

Answer 18

Segmental circulation, anaerobic population, collagen lysis exceeds synthesis and collagenase production increased

Question 19

Healing phases

Answer 19

Inflammatory phase (all leakage occuring during this time)
Proliferative phase
Maturation phase

Question 20

What healing phase is the phase we are concerned with dehisence?

Answer 20

Inflammatory phase

-recheck 3-5 days

Question 21

Intussusception signalment

Answer 21

Dogs > cat

GSD & siamese

Question 22

Intussusception etiology

Answer 22

Hypermotility, distemper, parvo, intestinal parasitism and bowel manipulation

Question 23

Intussusception CS

Answer 23

Inapptetence, vomiting, tenesmus &melena

US: bulls eye

Question 24

How to manage intussusception?

Answer 24

Manual reduction, R&A

- recurrence: enteropexy and enteroplication

Question 25

Enteroplication:

Answer 25

Last resort for intussusception- segment of intestine side by side to reduce recurrence

Question 26

Intestinal volvulus and torsion- signalment

Answer 26

Young adult, male large breed [GSD]

Question 27

Intestinal volvulus and torsion CS

Answer 27

CV Collapse, vomiting, abd distension, hematochezia

Question 28

Intestinal volvulus and torsion prognosis

Answer 28

Grave; survivors have short bowel syndrome