Lab 7: Calving Difficulties in Dairy Cattle (Risco) Flashcards
Ferguson Reflex
oxytocin released, which helps push calf forward via contractions
-dilation of vulva/vagina by hand/calf elicits it
abnormal birth positions see slide 8
:)
abnormal birth position: calf upside down
- anterior present.
- vet usually turns calf, or delivers backward
abnormal birth position: head bent back
- anterior present.
- vet pushes calf back into cow and brings head into position
abnormal birth position: foreleg retained
- ant. present.
- vet brings up retained leg joint by joint
abnormal birth position: backward-upside down
- post. present.
- calf must be turned in uterus until it assumes norm. position for delivery
abnormal birth position: calf backward***
- called a “true breech”: posterior present. with both hind legs under calf
- vet tries to straighten hindlegs then deliver calf backward
abnormal birth position: hindlegs forward
- ant. present.
- dorso-sacral
- serious abnormal position
- fetus must frequently be dismembered
- calf usually large
calf widest at:
greater trochanters (therefore must come out at angle)
hip lock can put pressure on which nerves?
obturator and sciatic –> paralysis
excessive forced extraction w/o rotation –>
hip lock
causes of dystocia***
twins
fetal monsters
uterine torsion
calf to large for cow**
methods of correcting uterine torsion
manual detorsion per vaginam
rolling the cow (roll toward the side/direction of the torsion; 84% success)
C-section
indications for rolling the cow
cow is recumbent
fetus can’t be reached (location/severity)
animal is preparturient
know what Krey hook looks like
slide 33; placed on lumbar area of calf after calf cut to pull calf closer to vulva so you can finish procedure
