OBSTETRIC ANAESTHESIA FOR VAGINAL DELIVERY + Vaginal manipulation D&C Flashcards
Where a complicated correction or fetotomy is
required, it is best to use general anaesthesia,
preferably in a veterinary hospital t/f?
t
it is relatively easy to place the mare
in dorsal or lateral recumbency with the use of?
hobble/hoist
elevation of the forelimbs will
allow the foal to fall back into the uterus in the
abdomen under the influence of gravity, t/f?
f - hindlimbs dapat
in cattle a single injection affects these 2 nerves
affecting the ___, __,__,__
coccygeal and
posterior sacral nerves
anus, perineum, vulva and
vagina
abolishing pelvic sensation, reflex abdominal contraction (‘straining’) is prevented. t/f?
4 benefits
t
intravaginal manipulations are facilitated,
retropulsion is made easier,
fetal fluid supplements are retained
defaecation is suspended
Cow: The epidural anaesthesia is useful whenever : 4 indications
straining is troublesome
uterus, vagina, rectum, bladder prolapse
episiotomy
suturing vulva or perineum
epidural anesthesia also inhibits myometrial contractions and has an effect in third stage of
labour or uterine involution
f - NO EFFECT
site of injection for epidural injection in CATTLE
middle of the first intercoccygeal space
(sacrococcygeal
space can also be used; however, it is smaller than
the first coccygeal space and in some older cows
becomes ossified.)
in cattle, Some inject a small volume of
local anaesthetic using a fine needle to desensitise
the skin over the injection site; others do not. t/f
t
in cattle:
gauge of needle and how long (Cm)
is inserted into the middle of the space at what angle?
18G 5 cm
right angle
some insert it in these angle
10^o from the vertical
there is no resistance to injection, the needle
point is in the epidural space t.f
t
cattle: Within ___ minutes of the injection the
tail becomes limp,
but it takes a slightly longer time
interval (10-20 minutes) before the ___ is
desensitised and the ____ reflex is completely
abolished.
2
perineum, straining
cattle: dose rate of 2% lidocaine
small cows/heifers - how many mL
large cows - how many mL
1.0 ml/100 kg,
injected at a rate of 1 ml
per second will produce obstetric anaesthesia
lasting about 30–150 minute
5 ml
7–10 mL
. The addition to the local
anaesthetic of 2% of _____ prolongs the
period of anesthesia
adrenaline
cattle: xylazine rate + how long its effects
f 0.05 mg/kg diluted to a volume of
5 ml
3 hours
e uterus of both species appears to be
more susceptible to rupture when manipulative
procedures are performed
ewe and doe
in sheep and goats, injection site is 1st intercoccygeal vertebrae but not in sacro coccygeal as well t.f
F - 1st inter + sacro pwede
s and G: needle and cm
dose of 2% 2% lignocaine
hydrochloride with adrenaline
3.5 cm, 20 gauge needle
1 ml/50 kg body weight
comibination of drugs that results in 36 hours of anesthe
1.75 ml
2% lignocaine hydrochloride and
0.25 ml 0.25% xylazine is injected into the epidural space at a dose
rate of 1 ml/50 kg
the first
coccygeal interspace is the preferred site in this animal
mare
5 cm cranial to the origin of the tail
hairs
small bleb of
local anaesthetic should be injected subcutaneously and into the surrounding tissue over the
site. in what animals?
horse
mare: needle gauge and cm
angle of insertion + cm in witdrawing
4–8 cm 18 gauge needle
10° from the vertical and
directed cranially until it strikes the floor of the
spinal canal; it should then be withdrawn 0.5 cm
before the injection is made.
2% lignocaine (lidocaine) hydrochloride is effective, using a volume of ___ ml in a
light hunter-type mare weighing 450 kg
6-8
large volume in mares causes ____
It also takes longer to take effect
in the horse than the cow t/f
ataxia
T
horse:
xylazine
detomidine
dilute where?
2% solutions of lignocaine hydrochloride
rapid-onset (5.3 minutes) and long-lasting (330 minutes)
(0.17 mg/kg)
(60 μg/kg)
10 ml 0.9% saline; the latter is used either
(0.22 mg/kg)
pig: indication for epidural anesth
replacing prolapses
of the vagina and uterus;
for a caesarian operation
site of onjection for pigs
lumbosacral space
pigs: angle of injection
20° caudal to the
perpendicular until it strikes the floor of the vertebral canal. The needle is then withdrawn slightly
and the injection mad
pigs: needle gauge and cm
10–15 cm 18 gauge needle for 100kg sow
Pig: how mny mL of 2% ligocaine HCl
1.0 ml per 4.5 kg
body weight injected at 1.0 ml per 2–3 seconds
should achieve anaesthesia by 10 minutes - 120 minutes
When parts
of the fetus have already passed through the pelvic
inlet, for instance, it is often possible by insinuating finger over the ___ , ____
space or in front of the fetal pelvis in posterior presentations, to apply sufficient traction to draw these
parts into the vulva
occiput
intermaxillary
Once
parts of the fetus are in the cervix, traction delivery
is generally simple t/f
F - vulva
also effective in posterior prsntn, ventral position
hook the fingers around the
retained limbs and draw them upwards and backwards into the maternal pelvis
breech presentation
insert the
finger beneath the fetal chin and, by drawing it
upwards, direct the muzzle in line with the birth
canal
vertex posture
fix the position of the
fetus in the uterus by gripping it with the right hand t.f
through the abdominal wall, and to direct the fetus
towards the pelvic inlet
f - left hand
