Large animal castration Flashcards Preview

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Flashcards in Large animal castration Deck (22)
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1

Pre operative considerations

systemically healthy

are there two testicles?

give tetanus toxoid

NSAIDs-Bute, Banamine

abx-depends on environment, penicillin, Ceftiofur

2

supplies

general instrument pack

sterile gloves

scrub

emasculators

suture

ropes

towels

+/- IV catheter

3

Standing castration

advantages: less cost & assistance, quicker, choice if poor anesthetic candidate

disadvantages-vulnerable position, avoid on small horses, donkeys and mules, assess temperament prior

sedation

local analgesia essential, spermatic cord/intra-testicular

position-tight to horse, keep head up and use reach of arms

4

recumbent castration

environment-field conditions, hospital conditions

anesthesia-xylazine followed by ketamine & diazepam

recumbency-left lateral vs dorsal

rope restraint-tie the limbs to maintain safety

5

open castration

incision-through both scrotum and parietal tunic

dissection-ligament of tail of epididymis

exteriorization-testicle and spermatic cord

+/- ligation-hemostasis, foreign material

masculation-leaves parietal tunic behind

6

emasculation

Nut to nut

held clamped from >1 min

variable types of emasculators

7

closed castration

incision-only through scrotum, not through parietal tunic!

stripping-dissection of scrotal fascia

emasculation

+/- primary closure- decreases ris of herniation, evisceration and foreign material

common

8

semi closed castration

incision-scrotum, 2 cm incision into parietal tunic

eversion of tunic

like closed castration-emasculate spermatic cords followed by parietal tunic

9

Scrotal healing

second intention-drainage, stretching incision, trim excess fascial tissue

primary closure-excellent hemostasis, if in sterile environment, increased cost

10

other procedures you can do during castration

remove wolf teeth 505 & 605

interferes with bit placement in the mouth

11

post-op reccommendations

open scroal incision-movement (trot daily), hydrotherapy (dec swelling)

closed-confinement to facilitate primary intention healing

isolation from mares-still has active spermatozoa for up to 2 days

12

Hemorrhage complication

common

emasculator application-thick cords, angle non-penpendicular, instrument condition

testicular artery-some dripping normal, active stream not normal

tx: wait 20-30 min and observe, sedate and regrasp cord to ligate

13

Evisceration complication

prolaspe of intestine/omental tissue through inguinal canal and scrotum

Standardbreds and Drafts

clean and replace contents back into abdomen-anesthesize and refer immediately

sequela-strangulation of tissue, septic peritonitis

14

edema complication

common, normal result

management-exercise and hydrotherapy

if non-responsive-reopen scrotal incision, promote further drainage

15

Septic funiculitis complication

infection of spermatic cord

open castration

tx: abx, drainage, sx

Champignon vs Scirrhous cord

strept vs staph

16

Clostridial infection complication

C. tetani-spastic paralysis

C. botulinum-flaccid paralysis

malignant edema-tissue necrosis, cellulitis, fever, depression, toxemia, death

poor px

17

septic peritonitis complication

vaginal cavity communicates with abdomen

tx: NSAIDs, abx, peritoneal lavage

referral

18

penile damage complication

inadvertant emasculation of penis

edema formation

paraphimosis

 

19

hydrocele complication

scrotal swelling-excess abdominal fluid in vaginal cavity

open castration

cosmetic problem

drainage not helpful

sx-remove parietal tunic

20

behavior

perpetual masculine behavior

learned response

older stallions

warn owners

21

Cryptorchidism

failure of one or more testicles to descend

inherited

dx: palpation, u/s exploratory, hormone assays

22

Food  animal castration

principels similar to equine castration

often done by producer

restrain alone vs sedation/anesthesia

scrotal incision

strip +/- ligate

Newberry knife-splits scrotum in half, good access and drainage

elastrator, callicrate

burdizzo

hendrson castrating tool