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Dystocia 1415

Dystocia
VetBooks.ir

Is stage II labor present?
(Abdominal efforts [tenesmus] coinciding with uterine contractions as detected with tocodynamometry)

Unknown, no Unknown, no No, stage Iis Yes, abdominal No, uterine Yes, and
tocodynamometry tocodynamometry present and efforts are contractions neonates
available. No available. appropriate (dam accompanying are weak or are viable
abdominal effort is Abdominal efforts may be restless uterine contractions infrequent
seen yet. are visible. or agitated, but no
abdominal
contractions
are present):
tooearly for
intervention

Monitor fetal heart Monitor fetal heart Monitor fetal • Monitor fetal heart Monitor fetal Continue
rates. Stage I might rates. If normal heart rates and rates heart rates monitoring
be present. If at term (>200 bpm), progression • Normal delivery and evaluate fetal HR and
(56-58 days from consider medical of labor to stage II should occur, condition uterine
diestrus day 1 or therapy if no in 12 to 24 hours typically within of dam contractions
64-66 days from the deliveries within 1- 1-1.5 hours until labor
initial rise in 1.5 hours complete
progesterone or the
LH surge), labor
should progress to
stage II within Fetal HR Fetal HR >200; Evaluate dam's
12-24 hours persistently <180 dam stable packed cell
volume, serum
total proteins,
electrolytes, glucose,
If no progression in and calcium.
24 hours, evaluate Start 5% dextrose or 2.5% Start 5% dextrose or
for prolonged dextrose in 0.45% saline at 2.5% dextrose
gestation 5-10 mL/kg IV in 0.45% saline
at 5-10 mL/kg IV
Medical Therapy

• Attempt medical If contractions weak, Treat according to
therapy give 1 mL/4.5 kg of abnormalities
• If no immediate 10% calcium gluconate detected
response, SQ (no more than 6 mL
cesarean section at any one site)
indicated

If no deliveries
10-15 minutes after
calcium administration,
give 0.25 U SQ or IM;
can be repeated q
30-60 minutes as
needed to max dose
4 U/DOG or 1 U/CAT Clinical Algorithms

AUTHOR: Autumn P. Davidson, DVM, MS, DACVIM
EDITOR: Michelle A. Kutzler, DVM, PhD, DACT

www.ExpertConsult.com