Objectives Perioperative prophylactic antibiotics (PPA) are widely used in
veterinary medicine to prevent surgical site infections (SSI). Current
guidelines advocate the use in clean procedures only if surgeries exceed
90 minutes, or in patients with an ASA score ≥3. Procedure
specific recommendations are currently lacking. The following study aimed to
analyze the protective effect of PPA in dogs undergoing open splenectomy.
Methods The electronic database of our institution was searched for dogs
that underwent splenectomy between 10/2017 and 01/2023. Data
collection included age at presentation, breed, weight, reason for splenectomy,
diagnosis, ASA class, PPA regime, surgery time, anesthesia time, lowest blood
oxygen concentration during anesthesia, lowest body temperature, and lowest
blood pressure during surgery as well as duration of hospitalization. Dogs were
included if a follow-up of 30 days after surgery was available, or if death
occurred within this timeframe.
Results A total of 112 dogs were included. Of these, 46 dogs received PPA,
and 66 did not. Most dogs were classified ASA 3 or higher (PPA 87%,
non-PPA 80.3%). One SSI (1.5% SSI rate) occurred in the non-PPA
group (overall SSI rate 0.9%). Due to the low SSI rate, statistical
analysis of risk factors for SSI development was not possible.
Conclusion The described infection rate of 1.5% without PPA
indicates, that splenectomy does not qualify as high-risk surgery for SSI, even
in patients with ASA class 3 or higher.
Clinical Relevance As splenectomies are frequently performed, the findings
of the current study could have a major impact on the overall antimicrobial
burden in routine veterinary practice.