Neutering Flashcards
when in the oestrus cycle should a bitch spay be performed?
during anoestrus (seasons must be avoided)
at what age is a bitch spay normally performed?
at 6 months (before first season)
or 3 months after the end of any season
what is the benefit of performing a bitch spay before or after first season?
maximum benefit in terms of prevention of mammary cancer
why should a bitch spay be performed 3 months after a season?
to avoid false pregnancy
should a bitch spay occur if there is false pregnancy?
no
at what age are dogs typically castrated?
6-9 months
may leave longer for larger breeds (>1 year) if there are no behavioural issues
when are cats spayed?
4-6 months
usually advocate saying as early as possible once over 2kg
can cats be spayed in season?
yes but uterine tissue likely to be more friable
when is cat castration performed?
4-6 months as long as testicles are big enough
what are the main reasons for spaying?
population control (especially cats)
prevention or treatment of health conditions
assisting management of diseases like DM or epilepsy
control of hereditary diseases
what health conditions can be prevented by spaying?
pyometra mammary cancer false pregnancy glandular hypoplasia prolapse ovarian cysts
what are the main indications for castration?
population control management and behavioural modifications prevention/treatment of disease control of hereditory diseases infectious disease control (e.g. FIV)
what behavioural modification may be achieved by castration?
control of: roaming male aggression unwanted sexual behaviour spraying and smell in tom cats
what diseases can be prevented by castration?
testicular disease
prostatic disease (BPH)
perineal rupture
what are the possible side effects of spaying?
weight gain coat change urinary incontinence perivulvar dermatitis hypoplasia of external genitalia increased risk of orthopaedic diseases and some cancers
what are the possible side effects of castration?
weight gain
coat change
worsening of nervous behaviour
increased risk of development of bladder and prostate cancer
delayed closure of growth plates in early neutering (giant breeds especially)
what are the 2 techniques available for spay?
surgical (most common)
medical
what is an ovariectomy?
surgical removal of both ovaries (common in lap spay)
what is ovariohysterectomy?
removal of both ovaries and uterus
what are the 2 ways of performing spay?
midline laparotomy
laparoscopically
why are laparoscopic spays more costly?
equipment costs more
what are the benefits of laparoscopic spays?
smaller incisions (especially in large breeds) faster return to normal activity reduced post op discomfort
how should the animal be positioned for a bitch spay?
midline approach
dorsal recumbancy
surgeon has dog’s head to their left
what clip is needed for a bitch spay?
umbilicus included and reaches pubis
2/3 of animal width
may need to be wider in a lap spay
why is a wide clip for a midline laparotomy needed?
drapes may move and incision may need to be extended
what prep is needed for all neutering surgeries?
routine aseptic scrub prep
what instruments are needed for a bitch spay?
soft tissue kit
at least 3 large artery forceps (curved or straight)
spay hook
what suture material may be requested by the vet during a bitch spay?
Ligatures: Synthetic absorbable multifilament or monofilament, e.g. Vicryl or PDS or Catgut (less common) Linea alba (midline): Synthetic absorbable long-duration monofilament, e.g. PDS - requires extra strength due to gravity Subcutaneous layer: Synthetic absorbable short-duration monofilament, e.g. Monocryl Skin (commonly using an intradermal suture pattern): Synthetic absorbable short- duration monofilament, e.g. Monocryl
what is the most common approach for a cat spay?
flank
when is a midline approach used for a cat spay?
if pregnant or not known if already neutered
how should the animal be positioned for a cat spay?
Cat lies in right lateral recumbency, surgeon has cat’s head to their left
Hindlegs often tied back but check with surgeon