Equine Clinical Repro Flashcards
How does a “foal movement” colic present? Tx?
Mild-moderate colic
Tx: Buscopan/PBZ
What would be your main ddx if a pregnant mare present with signs of colic, peritonitis and endotoxaemia?
Ichaemia/Necrosis/Rupture of caecum and colon
due to foal weight!
How can you tell that a pregnant mare with colic is not just foaling/aborting?
Vaginal Exam - is the cervix open?
Which colic presents in the last trimester as low grade/intermittent, but in some cases may be severe?
Uterine Torsion
How is an equine uterine torsion diagnosed?
Rectal palpation - one broad lig will be much tighter than the other!
NB Vaginal not used as twist is AFTER cervix
What are the 4 Tx options available for a uterine torsion?
Surgery
Standing flank laparotomy
GA, midline laparotomy
GA, rolling (DONT)
What is a possible benign cause of ventral abdominal oedema in the mar?
Compression of lymphatic drainage by foal - will resolve post-foaling
or OBESITY
What are your 4 main DDx for the overly large mare?
Hydrops Amnion
Pre Pubic Tendon Rupture
Obesity
Lymphatic compression
Which horses are predisposed to Pre-pubic tendon rupture?
Older Mares
How does pre-pubic tendon rupturee present?
Colic signs
Large painful oedema consistent with udder (dropped udder)
Blood in milk
Mare Recumbent
What must be done for cases of pre-pubic tendon rupture?
PBZ for analgesia
Assistance foaling/caesar
May PTS if progresses
On rectal exam of a pregnant mare, you note a huge fluid filled uterus but foal out of reach. Main Ddx?
Hydrops Amnion/Allantois
How is hydrops amnion treated?
Induce foaling/abort:
Dilate cervix, drain fluid slowly.
Manually remove foal.
IVFT to systemic BP.
What is the danger of hydrops amnion?
Can cause colic, dyspnoea, recumbency, circulatory collapse.
Foal will likely be deformed
What are the clinical signs of placentitis?
premature udder development and lactation ± vaginal discharge
Which pathogens are responsible for placentitis?
Strep. spp, E.coli, Aspergillus.
All ascending from cervix
How is placentitis Dx/Tc?
Dx: signs, US (placental thickening), Cervical swabs.
Tx: TMPS, PBZ
What is the most common cause of vaginal bleeding in the horse?
Varicose veins
Which malpositions would immediately warrant a caesarian?
All 4 feet forwards (with or without head)
What should be done in cases of uterine tears?
Extract Foal and PTS mare if complete
If small, normal foaling and Tx mare peritonitis
How are uterine tears diagnosed?
Rectal/vaginal exam
US
Peritoneal tap
What should be done for minor perineal lacerations?
Will heal alone
AB/NSAID/Tetanus
What should be done for perineal lacerations which substantially disrupt the perineal anatomy?
Surgical repair - delay if severe bruising.
AB/NSAID/Tetanus
How do you treat 3rd degree perineal lacerations?
AB/NSAID/Tetanus
Surgery in 4-6 once granulation started - often need multiple surgeries
A mare begins to colic mildly after foaling and has no signs of endotoxaemia - major Ddx?
Uterine cramps
how are uterine cramps treated?
Buscopan/PBZ
A mare begins to colic and strain after foaling. Analgesia does not relieve her pain. Dx? Tx?
Inversion of uterine horn - diagnose via vaginal and rectal
Analgesia, buscopan, manual replacement, lavage
Which post-partum colic is rapidly fatal and requires surgical intervention?
Colonic torsion
What cause a mild to moderate post partum colic which may progress to haemorrhagic shock?
Uterine artery rupture
Into which 2 places may the uterine aretery haemorrhage?
BL or abdomen
How is uterine artery rupture diagnosed?
GENTLE palpation of the broad ligament per rectum
Abdo/rectal US
How is uterine artery rupture treated?
Sedate
Analgesia
IV fluids/transfusion
Clotting agents: aminocaprionic acid
What causes a uterine prolapse?
Pulling on RFM
Dystocia
What is/are the potential causes of death from a uterine prolapse?
Prolapse: rupture uterine vessels
Replacement: metritis/endotoxaemia
How is a uterine prolapse treated?
Clean uterus
Replace under epidural
Give oxytocin
BSABs and NSAID
Within what time frame are foetal membranes normally passed?
2h
What are retained foetal membranes?
Placenta still present >4h after foaling
How are RFMs treated?
Oxytocin 1-2ml
BSABs, flunixin, Tet
Repeat if not passed
How many RFMs be removed manually? (CONTROVERSIAL)
Gentle traction on allantois.
then gentle twisting of allantois.
then uterine lavage and oxytocin
MAINTAIN ON ABs and NSAIDs
How is metritis treated?
Oxytocin 1-2ml
BSABs, flunixin, Tet, lavage
How should orphan foals be raised?
BY FOSTER MARE ONLY!!!
Hand-rearing causes dangerous horses!!!!
When does puberty occur in colts?
12-24m
When is maximal sexual maturity reached in male horses?
4-5y
How long does equine spermatogenesis take?
60d
During which season do stallions produce the most sperm?
Summer
What does a breeding soundness exam of the stallion involve?
External genitalia exam Internal genitalia exam observe libido Semen evaluation Testicular Biopsy Testicular US Urethral Endoscopy
Where are stallion swabs taken for CEM?
Urethra
Urethral fossa
Penile Sheath
Pre-ejactulatory Fluid
what can be used to protect stallions against Equine Viral Arteritis?
Artervac vaccine - prevents EVA abortion
How should a traumatic testicular swelling be treated?
NSAID+/- corticosteroids Cold Massage Support \+/- diuretics
How should paraphimosis be treated?
Support with a truss
Can do purse string suture to hold in place
How is priapism treated?
Flush Corpus cavernosum w/heparinised saline under GA
Can amputate but not if horse wants to continue working
What are 3 extra sources of colic in the stallion?
Inguinal herniation
Scrotal Hernias
Testicular Torsion
What is a potential problem associated with scrotal/penile dermatitis?
Inflammation- can prevent mating/sperm production
How soon must fresh semen be used?
within a few hours - unless use extenders to inc lifespan
How long will chilled semen last?
48h - can transport
How long does frozen semen last?
Forever
How is fresh/chilled semen inserted into the mare?
Through the cervix via insemination catheter - NO RUBBER BUNGS!
How is frozen semen used?
Straws warmed to 37 in water bath
Inserted through the cervix or into uterine horn (ovulating side)
When should fresh/chilled semen be inserted?
48h pre-ovulation
When should frozen semen be inserted?
up to 12h before or 6h after ovulation
What is the stomach capacity of the foal?
1.5L/50kg
As a % of BW, how much milk does a foal consume in its 1st day of life?
10%
As a % of BW, how much milk does a foal consume in its 2nd day of life?
20%
As a % of BW, how much milk does a foal consume in its 1st week of life?
25-30%