B. Hansen et E. Hardie, PRESCRIPTION AND USE OF ANALGESICS IN DOGS AND CATS IN A VETERINARY TEACHING HOSPITAL - 258 CASES (1983-1989), Journal of the American Veterinary Medical Association, 202(9), 1993, pp. 1485-1494
The frequency of prescribing analgesics and administering them for the
treatment of apparent postoperative pain in 243 dogs and 15 cats was
evaluated. Surgeries performed on the animals evaluated included limb
amputations, limb-sparing bone cancer resection, thoracotomy, cervical
vertebral instability repair, and humeral fracture repair. Only 1 cat
was treated once with an analgesic after surgery, and cats were not e
valuated statistically. Dogs undergoing amputation, limb salvage proce
dure, or thoracotomy were more likely to be treated than dogs undergoi
ng the other surgeries. Ninety-six (40%) of the 243 dogs were under th
e influence of an analgesic at any time during their postoperative hos
pital stay, and 69 dogs (28%) received 1 or more doses of an analgesic
after recovery from general anesthesia. One hundred thirty-three dogs
were cared for in the intensive care unit (ICU) immediately after sur
gery. Written instructions for treatment with an analgesic were given
for 61 of those dogs, and 50 were given at least 1 dose of the prescri
bed analgesic. Dogs cared for in the icu were twice as likely to be gi
ven an analgesic as dogs cared for in the surgery ward. The estimated
duration of analgesic effect exceeded 8 hours in 46 (19%) of 243 dogs.
Small and juvenile dogs were least likely to be treated. Interns and
residents were twice as likely as faculty to administer analgesics. Mo
st written interpretations of pain behavior observed in the ICU were m
ade on the basis of vocalizations. Half of the dogs for which medical
record comments suggested moderate to severe pain were not given an an
algesic. The most frequently administered analgesic immediately follow
ing surgery was oxymorphone, followed by butorphanol and morphine. Asp
irin was never administered to dogs in the icu, but was used in 10 dog
s that were in the surgery ward for > 74 hours.