Periparturient Arterial Ruptures in Mares

Arterial Rupture: a tear that occurs in anartery that leads to internal bleeding anddeath

Average of 34 died each year for 15 years in case study

Uterine artery most commonly affected area

Uterine tear can be anywhere along the uterine aretery

60% of ruptures within 20cm of artery origin

Symptoms

Typically occurs in older mares

Progressing restlessness,colic-like symptoms,

other signs of pain

Pale mucus membranes and showing signs of

shock

Abdomen containing mass amounts of blood

and blood clots

23% show no symptoms before death

Internal organs are pale

Past Health History

59% were barren within the past

year

Most mares hada mean foaling

history of 7 foals

14% had a history of Dystocia

Ruptures caused more because of

arterial weakeningand not trauma

from foaling

Age at which Mares are mostsusceptibility

Mean age of ruptures is 16.7 years

Mean age of uterine artery rupture is 18.9 years

30% of mares older than 15 years died from ruptures

Arterial ruptures tend to happen mostly in older mares

Spontaneous ruptures in older mares and previous injury to area in younger mares

highlighterruptures & Parturition

Of ruptures happened before parturition(average of 51 days prior to due date)

Of ruptures happened during parturition

Of ruptures 24 hours after parturition

Of ruptures happened 24 hours after parturtion

Of ruptures happened 24 hours after parturition

Most ruptures occur with parturition

Of ruptures happened 24 hours after parturition

61.3% of ruptures happen on side of

pregnant horn

Periparturient Arterial Rupture in Mares: Postmortem Study

By: Williams N.M and Bryant U.K (2011)

Information from:All

Infographic made by: Bianca Frank