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Discussion on Research Summary: Caserian Survival, PostOp Complicaton, Fertility Statistics
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Moderator:
DrO
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Posted on Wednesday, Mar 13, 2013 - 6:40 pm:
J Am Vet Med Assoc. 2012 Oct 1;241(7):927-34.
Survival rates of mares and foals and postoperative complications and fertility of mares after cesarean section: 95 cases (1986-2000).
Abernathy-Young KK, LeBlanc MM, Embertson RM, Pierce SW, Stromberg AJ.
Rood and Riddle Equine Hospital, Lexington, KY 40511, USA.
Abstract
OBJECTIVE:
To assess survival-to-discharge rates of mares and foals and postoperative complications and fertility in mares following cesarean section (C-section).
ANIMALS:
95 mares.
PROCEDURES:
Medical and breeding records of mares that underwent C-section were reviewed; signalment, surgical technique, complications, survival-to-discharge rate, and pregnancy and foaling rates were recorded and evaluated. Foaling rates in the 3 years after C-section were compared with the cumulative foaling rate before C-section.
RESULTS:
C-section was performed because of dystocia (n = 71) or concurrent maternal disease (20) or was elective (4). Overall survival-to-discharge rate was 84% (80/95) for mares and 35% (28/80) for foals. Six of 15 mares that had partial fetotomies prior to C-section did not survive. Mares that had dystocia for < 90 minutes had the fewest complications. Cumulative foaling rate before C-section was 77% (394/509). Overall foaling rate for the 3 years after C-section was 52% (30/58) and 68% (13/19) when duration of dystocia was ≥ 90 minutes and < 90 minutes, respectively, and was 31 % (9/29) for mares ≥ 16 years old. Foaling rate was significantly lower for mares bred in the same year as C-section than for mares bred in later years.
CONCLUSIONS AND CLINICAL RELEVANCE:
Breeding in the same year as C-section, dystocia for ≥ 90 minutes before C-section, and mare age ≥ 16 years were associated with poor foaling rates. Prognosis for delivery of a live foal in years following C-section was good if duration of dystocia was < 90 minutes and the mare was < 16 years old at the time of surgery.
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