The study was a randomised controlled trial of client-owned dogs and cats presenting as emergencies and requiring intravenous catheterisation.
Patient signalment and mentation score were recorded.
Patients were randomly allocated to either a swab saturated with vapocoolant spray or a swab saturated with saline applied to the clipped area before intravenous catheterisation.
Indirect application of vapocoolant spray via a swab before catheterisation was not found to significantly reduce the reaction of dogs and cats, nor to improve placement success rates.
The study did demonstrate a significantly greater adverse response to vapocoolant spray application to the skin via a swab when compared with the saline control in canine patients; feline patients demonstrated adverse responses to both vapocoolant spray and saline swabs.
It is unclear if the technique of application used in this study provided sufficient cooling effect to provide the required cryoanaesthesia to influence patient reaction.
The authors say future studies should be used to determine optimal vapocoolant spray application technique in dogs and cats, as well as examine its application in other populations and procedures.
Nicola Di Girolamo, Editor of JSAP concluded: “Pragmatic, adequately-powered, randomised controlled trials like the one presented here are essential to evaluate whether an intervention is not only efficacious in a controlled environment, but also effective during clinical practice.”
Full article: https://onlinelibrary.wiley.com/doi/full/10.1111/jsap.13504
Reference
Trinder, R, Humm, K, Phillips, S, and Cole, L (2022) The efficacy of vapocoolant spray for the improved tolerance of catheter pain in emergency patients in dogs Journal of Small Animal Practice, Available at: https://onlinelibrary.wiley.com/doi/full/10.1111/jsap.13504
PS: Whilst you're here, take a moment to see our latest job opportunities for vets.