Abomasal Ulcers and Obstructions, TRP/Ruminotomy, Choke Flashcards
surgery to remove FBs/Bezoars from abomasum
diagnosis if RIGHT flank laparotomy surgery for removal: RIGHT PARACOSTAL incision (MUST be in lateral- NOT standing, because intestines would fall out)
how to close rumen
double layer inverting
causes of intraluminal abomasal obstructions (4)
-FB (rare) -phytobezoars (calves) -trichobezoars (calves) -abomasal impactions (adults)
causes of extraluminal obstructions of abomasum
-incarceration (hernia) -fat necrosis -pyloric LSA
why should you NOT use a cannula and trocar to relieve ruminal tympany?
can lead to peritonitis; use needle or rumen fistula instead
pros and cons to suturing rumen to skin during ruminotomy
pros: least risk of contamination cons: longer to do; more incisional complications
withers test
if you pinch or press on withers and the cow goes into lordosis = no pain; if back remains straight= abdominal pain
TRP can cause which types of bloat?
either vagal type 1 (free gas- reverse D) or vagal type 2 (papple)
which ruminotomy technique has least risk of contamination?
suturing rumen to skin
what do you do to relieve free gas bloat secondary to choke?
use needle or rumen fistula NOT cannula/trocar (can lead to peritonitis)
surgical options for abomasal ulcers in calves
-burying of ulcer -excision Done in LEFT lateral
Choke causes what kind of bloat?
Free gas bloat (reverse D) due to type 1 vagal indigestion
choke causes what kind of metabolic disturbance?
metabolic acidosis
pros and cons of rumen board and weingarth appartus
pros: quick, less skin inflammation, fewer incision complications cons: increased risk of contamination
treatment for abomasal ompactions in adult cattle is to do a right laparotomy with MANUAL MASSAGE. what are the cons of this?
can NOT do an abomasotomy can NOT exteriorize abomasum
pH of ruminal saliva
8.2
indications for ruminotomy (5)
-TRP -choke (if you push it distally into rumen) -intoxication (monensin) -bloat -obstruction of reticulo-omasal orifice
compass test
placing compass over left paralumbar fossa to see if magnet already in reticulum
temporary rumen fistula: site
center of paralumbar fossa on LEFT side
types of ulcers
Type 1: nonperforating without major hemorrhage Type 2: nonperforating WITH major hemorrhage Type 3: perforating with LOCAL peritonitis Type 4: perforating with DIFFUSE peritonitis
prognosis for intraluminal abomasal obstructions
Best: if ONLY at pylorus (90%) Worse: if pylorus AND abomasal body (50%)
diagnosis of intraluminal obstructions in abomasum
RIGHT flank laparotomy
surgical options for abomasal impactions
RIGHT flank approach for MANUAL MASSAGE cons: can NOT do abomasotomy and can NOT exteriorize abomasum sometimes a right paracostal approach + abomasotomy is done. but difficult and rare
surgery for umbilical hernia
herniorrhaphy +/- partial abomasectomy
prognosis for TRP
guarded if it involves RIGHT side of reticulum Poor if penetrating ok otherwise
options for doing a ruminotomy
-rumen board -weingarth apparatus -sutures direct to skin -stay sutures or clamp fixation (do NOT use)
which position is ulcer surgery done in for calves
LEFT lateral
