Equine Emergency Flashcards
what are the most common emergency surgeries performed in horses?
colic
dystocia
trauma
synovial sepsis
fracture repair
what is colic?
broad term for abdominal discomfort in horses
what body systems are potentially involved when a horse has colic?
GI tract
liver
urinary tract
reproductive organs
what can the colic work up help to identify?
body system that is involved
what questions should be asked of the owner of a colicking horse?
how long for
severity of signs
when were faeces last passed
breed/age/sex
has this happened before
any management changes recently
geographic location -sand
what questions should you ask the referring vet about a colic case?
TPR on initial presentation
and any subsequent
clinical findings so far
medications administered
response to any medications administered
suspected lesion
is surgery an option for the owner
are they insured
horse temperament
what tests may the referring vet have carried out on a colic case already?
NG tube
rectal exam
what drugs may be needed for colic assessment?
sedation
NSAIDs
buscopan / buscopan compositum
what sedation may be used for a colic case?
xylazine
detomidine
butorphanol
what equipment is needed for colic assessment?
drugs
clippers
prep solution
catheter
blood tubes
lactate reader
NG tube
rectal gloves and lubricant
fluids (isotonic and hypertonic)
US machine
where will colic workup often take place within the hospital?
stocks
if unsafe knockdown box
what essential equipment could go in a grab box if a colic case is moving straight to the knockdown box?
IVFT
bloods
what are the stages of a colic workup?
focused physical exam
rectal exam
pass NG tube
bloods
AFAST
abdominocentesis
what are the areas of the focused physical exam in a colic workup?
demenour
signs of pain
abrasions on face from rolling
TPR
borborygmi
MM
pulses
abdominal distension
what is indicated by purple MM?
endotoxaemia which is suggestive of GI rupture
when should TPR be performed if possible?
pre- medication
what may be required for rectal exam?
sedation
buscopan
why is passage of an NG tube before surgery so crucial?
horses unable to vomit
if obstruction present and stomach fills they are at risk of gastric rupture
what patient parameters suggest that gastric decompression should be performed?
high HR
significant pain
what does reflux on passage of an NG tube indicate?
SI obstruction
what amount of refluxed fluid would suggest a colic is surgical?
> 2L
what blood tests should be performed on colic patients?
PCV
TP
lactate
haem and biochem if time
what is being assessed dung an AFAST for colic?
distention
motility
displacement
what should fluid obtained through abdominocentesis in a colic exam be assessed for?
TNCC
TP
lactate
what is the aim of the initial hospital exam?
is the colic medical or surgical
what are the findings on clinical exam that would indicate surgical colic?
congested MM
CRT >3s
HR >60-80 bpm
poor PQ
uncontrolled pain
what are the findings on rectal exam that would indicate surgical colic?
distension or displacement of small or large intestine
what are the findings on NG intubation that would indicate surgical colic?
> 2L reflux
what are the findings on ultrasound that would indicate surgical colic?
amotile, distended loops of SI
what findings on bloods or abdominocentesis would indicate surgical colic?
high lactate
what other conditions may be indicated by amotile distended SI?
ileus
enteritis
what must be done if a colic patient is moving to surgery?
ensure IVC in place and patent
ensure gastric decompression has ben performed or NG tube is left in
start clipping abdomen if safe
remove shoes if safe
what is the size of clip required for colic surgery?
20cm either side of midline over whole ventral abdomen
what equipment is needed for knockdown and prep of colic patients?
theatre bed ready for horse in dorsal recumbency
anaesthetic machine and circuit
hoist
clippers
ucath and suture
surgical scrub
how may horses be prepped for colic surgery?
may hose first if lots of rolling to remove most gross debris
then use hibi and spirit after
what equipment is needed in theatre for colic surgery?
warmed fluids
CMC
surgical kit (2-3)
fresh gowns and gloves
drapes
hose
colon table and dump drum
what are warmed fluids needed for in colic surgery?
lavage
what is CMC?
carboxymethylcellulose
what is the role of CMC in colic surgery?
lubricant to prevent post op adhesions
why are multiple surgical kits needed for colic surgery?
need clean kit to close the abdomen and new kit if performing multiple enterotomies
why are fresh gowns and gloves needed for colic surgery?
in case of contamination, enterotomy or resection
what is a hose used for in colic surgery?
to clear the colon
where is the incision for colic surgery made?
ventral midline (~20cm)
what is involved in colic surgery?
all GI tract assessed for distension, thickening, viability and displacement
what should happen to any non-viable intestine?
resected and anastomosed
what is found within resection kit?
buster drapes
doyen bowel clamps
suture material
fluids for lavage
what suture material is likely to be used for anastomosis?
PDS 2-0 but check with surgeon
does large intestinal displacement require resection/anastomosis?
no
what must be done with LI displacements?
contents of pelvic flexure dumped via enterotomy
may use hosepipe to flush out colon
how should the colon table be placed when emptying the pelvic flexure?
tilt downwards so that contents run into the dump drum and away from the surgical field
how is the abdomen closed following colic surgery?
usually 3 layer closure
what are the 3 layers of the abdomen closed following colic surgery?
linea alba
SC tissue
skin
what material is used to close the linea alba?
vicryl 0 or 2
what suture material is usually used to close the SC tissue of the abdomen?
PDS usually