Large Animal Surgery Models Flashcards Preview

2021 ACLAM Images > Large Animal Surgery Models > Flashcards

Flashcards in Large Animal Surgery Models Deck (14)
Loading flashcards...
1

 

Olbe chronic esophageal Fistula 

Developed to study cephalic phase control of gastric, pancreatic and other gut function 

Allows “sham” feeding –the food is chewed and swallowed, but does not enter the stomach 

2

Name

Description

Purpose

 

Mann-Bollman Fistula

Intestinal loop isolated and anastomosed end-to-side with intact intestinal tract with other end connected to skin 

Orientation of intestinal loop allows peristalsis to occur away from skin to prevent leakage 

“Moving Backwards” 

Method used to make one or more fistulae at any level of intestinal tract 

Used to study secretions of intestine 

3

Name

Description

Purpose

 

Thiry fistula

Isolated loop of intestine with intact blood and nerve supply 

One end is closed and other opens into skin with peristalsis towards skin to facilitate collection 

End-to-end anastomosis restores continuity of remaining intestine

Used to obtain pure intestinal secretions 

4

Name

Description

Purpose

 

Thiry-Vella Fistula

Prepare same way as Thiry except both ends of blind loop are connected to skin 

Intact blood and nerve supply 

Used to obtain pure intestinal secretions 

“Two words –two holes” 

5

Name

Types

Descriptions

Purpose

 

Eck Fistulas

Artificial communication made between portal vein and vena cava 

Created by side-to-side anastomosis of portal vein to vena cava below liver 

Straight Eck: tie off the portal vein above last tributary 

Shunting of portal blood into inferior vena cava 

Reverse Eck: tie off vena cava 

Liver bypass 

Allows for study of hepatic encephalopathy and investigation of liver’s role  in metabolism 

6

Name

Description

Purpose

 

Witzel’sGastrostomy 

Foley catheter from stomach through skin is exteriorized 

Catheter partly buried in stomach wall and stomach fastened to anterior abdominal wall 

Used to treat gastric dilatation volvulus (GDV) in large dogs 

7

Name

purpose

 

Pavlov Cannula 

Spool-like device plugged with a cork 

Allows direct access to stomach 

Used to introduce food or fluid or to obtain stomach content samples 

8

Name

placement

effect

 

Goldblatt’s clamp

applied experimentally to renal artery 

Dampens pulse pressure and produces chronic hypertension by activation of renin-angiotensin system 

9

RITARD:

Stands for

Model for

Technique

Removable Intestinal Tie, Adult Rabbit Diarrhea

Surgical model of choice for studying pathogenesis of diarrheas of Campylobacter, E. coli, and Aeromonas origin

 

10

 

Pavlov’s Fundic Pouch 

Linear pouch of greater gastric curvature allowed to drain to outside of the abdomen 

Base of pouch still connected to stomach but mucosa cut at base and pouch separated from main stomach by infoldingmucosa of both 

Base remains in normal contact with rest of stomach allowing preservation of vagal innervation 

Study of nervous phase of gastric secretions 

11

Name

Features

Study of

 

Heidenhain pouch 

Linear pouch of greater gastric curvature allowed to drain to outside of the abdomen 

Vagal nerves severed while keeping gastro-epiploicartery intact 

Preserve vascular supply but not vagal innervation 

Can collect large quantities of gastric fluid without food contaminants 

Study effect of drugs on gastric secretions 

12

 

Mann-Williamson

Technique for duodenal drainage 

Allows diversion of gastric juices into 

intestine 

Connect jejunum to pylorus of stomach

 

and close both ends of duodenum 

Diverts gastric juices downstream from alkaline pancreatic and biliary secretions 

95% of animals develop chronic peptic ulcers just distal to gastric anastomosis 

Standard model for producing chronic peptic ulcer by duodenal drainage 

Study effect of ejected acid in producing ulcers 

13

Name

Description

Purpose

 

Duodenal reversal

Distal duodenum anastomosed to gastric antrum and proximal duodenum to distal jejunum 

Antiperistalsis of duodenum acts as physiological obstruction producing dilation of stomach and duodenum 

Chronic jejunalulcers occur in 70% of animals w/in 6 mos

14

Name

description

purpose

 

Polya Type pylorectomy

Developed to re-establish continuity of intestinal tract following resection of pyloric antrum 

Study differences in fundic(acid, pepsin) and pyloric (alkaline mucus, gastrin) secretory function